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Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

Published by Createspace Independent Publishing Platform, United States (2012)

ISBN 10: 1481129481 ISBN 13: 9781481129480

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About this Item: Createspace Independent Publishing Platform, United States, 2012. Paperback. Condition: New. Language: Romanian. Brand new Book. Motoarele termice cu ardere interna in linie (fie ca lucreaza in patru timpi, ori in doi timpi, motoare de tip Otto, Diesel, sau Lenoir) sunt in general cele mai utilizate. Problema echilibrarii lor este una extrem de importanta pentru buna lor functionare. Exista doua tipuri de echilibrari posibile: statice si dinamice. Echilibrarea statica (totala) face ca suma fortelor inertiale dintr-un mecanism sa fie zero. Exista insa si echilibrari statice partiale. Echilibrarea dinamica inseamna anularea tuturor momentelor (sarcinilor) inertiale din mecanism. Seller Inventory # APC9781481129480

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Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

Published by Createspace Independent Publishing Platform, United States (2011)

ISBN 10: 146813082X ISBN 13: 9781468130829

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: Romanian. Brand new Book. Energia regenerabila este energia care provine din resursele naturale cum ar fi lumina soarelui, vantul, ploaia, mareele, si caldura geotermala, toate acestea fiind regenerate automat (pe cale naturala). In 2008, circa 19% din consumul total de energie al planetei a provenit din energiile regenerabile, grosul de 13% fiind obtinut din biomasa traditionala, care a fost utilizata in principal pentru incalzire, iar 3.2% a provenit din hidroelectricitate. Restul de 2,7% a fost obtinut prin metode moderne ca (micro hidrocentrale, biomasa moderna, vant, soare, geotermal, biocombustibili, etc), dar toate aceste energii regenerabile moderne sunt intr-o permanenta si rapida crestere. In cadrul energiei globale, cea electrica reprezinta circa 18%, fiind obtinuta in principal prin hidrocentrale (15%), iar restul de 3% prin noile energii regenerabile. Aceasta carte doreste sa propuna noi metode de obtinere a energiilor regenerabile. Dupa 1950 au inceput sa apara uzine nucleare pe fisiune. Energia de fisiune nucleara a reprezentat un rau necesar. Ea a reusit sa lungeasca viata petrolului si sa previna o criza energetica globala foarte grava. Chiar si asa, energia obtinuta din hidrocarburi (petrol, carbune, gaze, biomasa) reprezinta aproximativ 66% din totalul de energie produsa si utilizata astazi la nivel mondial. Daca mentinem acest nivel de productie si consum petrolul se va epuiza in circa 40 ani. Pe de alta parte, astazi, productia de energie nucleara (superioara), bazata pe fuziune nucleara, nu este inca perfect pusa la punct (desi studiile se afla intr-un stadiu foarte avansat). Insa timpul trece repede. Trebuie sa ne grabim sa implementam si sa dezvoltam noile energii regenerabile deja cunoscute, dar si noi posibile energii regenerabile. In aceste conditii, prezenta lucrare vine sa propuna noi posibile surse de energii regenerabile. Seller Inventory # APC9781468130829

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Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

Published by Createspace Independent Publishing Platform, United States (2011)

ISBN 10: 1467987646 ISBN 13: 9781467987646

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: English. Brand new Book. Development and diversification of machines and mechanisms with applications in all areas of scientific research requires new systematization and improvement of existing mechanical systems by creating new mechanisms adapted to the modern requirements, which involve more complex topological structures. Modern industry, the practice of engineering design and manufacture increasingly rely more on scientific research results and practical. The processes of robotisation of today define and influence the emergence of new industries, with applications in specific environmental conditions, handling of objects in outer space, and are leading teleoperator in disciplines such as medicine, automations, nuclear energetic, etc. In this context this book attempts to bring a contribution to science and technology applied in the kinematic and dynamic analysis and synthesis of mechanisms with gearings. Seller Inventory # APC9781467987646

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Dr Florian Ion Tiberiu Petrescu, Dr Relly Victoria V Petrescu

Published by Createspace Independent Publishing Platform, United States (2011)

ISBN 10: 1468092405 ISBN 13: 9781468092400

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: Romanian. Brand new Book. Cartea aduce cateva contributii importante in studiul angrenajelor cu roti dintate. Se prezinta o metoda noua de evitare a interferentei dintilor in angrenare, numarul minim de dinti al rotii 1 conducatoare fiind impus de raportul de transmitere al angrenajului cat si de unghiul de angrenare normal pe cercul de divizare, alpha 0. Se prezinta fortele din angrenare, distributia de forte, puterile si modul de determinare a randamentului angrenajelor, atat la mecanismele cu axe fixe cat si la cele cu axe mobile. Seller Inventory # APC9781468092400

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Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

Published by Createspace Independent Publishing Platform, United States (2013)

ISBN 10: 1494241528 ISBN 13: 9781494241520

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About this Item: Createspace Independent Publishing Platform, United States, 2013. Paperback. Condition: New. Language: English. Brand new Book. LAWS OF ROBOTICS: 1. The robot must not harm humans or through inaction allow anything to happen to a human being. 2. The robot must obey human commands, but only when they do not contradict the Law 1. 3. The robot must protect its existence, but only when self-care law does not contradict the law of 1 or 2. Moving mechanical structures are used increasingly in almost all vital sectors of humanity. The robots are able to process integrated circuits sizes micro and nano, on which the man they can be seen even with electron microscopy. Dyeing parts in toxic environments, working in chemical and radioactive environments, or at depths and pressures at the bottom of huge oceans, or even cosmic space conquest and visiting exo-planets, are now possible, and were turned into from the dream in reality, because mechanical platforms sequential gearbox. Robots were developed and diversified, different aspects, but to-day, they start to be directed on two major categories: systems serial and parallel systems. Parallel systems are more solid, but more difficult to designed and handled, which serial systems were those which have developed the most. In medical operations or radioactive environments are preferred mobile systems parallel to their high accuracy positioning. Seller Inventory # APC9781494241520

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Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

Published by Createspace Independent Publishing Platform, United States (2012)

ISBN 10: 1481083163 ISBN 13: 9781481083164

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About this Item: Createspace Independent Publishing Platform, United States, 2012. Paperback. Condition: New. Language: English. Brand new Book. In the first chapter the authors present an original method to calculate the efficiency of the cams mechanisms. The second chapter presents an original method in determining a general, dynamic and differential equation for the motion of machines and mechanisms, particularized for the mechanisms with rotation cams and followers. The third chapter presents an original method to determine the general dynamics of mechanisms with rotation cams and followers, particularized to the plate translated follower. First, it presents the dynamics kinematics. Then it solves the Lagrange equation and using an original dynamic model with one degree of freedom, with variable internal amortization, it makes the dynamic analysis. The fourth chapter briefly presents an original method for determining the dynamics of mechanisms with rotation cam and translated follower with roll. First, one presents the dynamics kinematics. Then one performs the dynamic analysis of a few models, for some movement laws, imposed on the follower, by the designed cam profile. The fifth chapter presents an original methods to determine the dynamic parameters at the classic distribution, and a new method is presented in the sixth chapter. The seventh chapter presents an original methods to determine the dynamic parameters at the camshaft with rotary cam and translated follower with roll. Seller Inventory # APC9781481083164

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Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

Published by Createspace Independent Publishing Platform, United States (2011)

ISBN 10: 1467987646 ISBN 13: 9781467987646

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: English. Brand new Book. Development and diversification of machines and mechanisms with applications in all areas of scientific research requires new systematization and improvement of existing mechanical systems by creating new mechanisms adapted to the modern requirements, which involve more complex topological structures. Modern industry, the practice of engineering design and manufacture increasingly rely more on scientific research results and practical. The processes of robotisation of today define and influence the emergence of new industries, with applications in specific environmental conditions, handling of objects in outer space, and are leading teleoperator in disciplines such as medicine, automations, nuclear energetic, etc. In this context this book attempts to bring a contribution to science and technology applied in the kinematic and dynamic analysis and synthesis of mechanisms with gearings. Seller Inventory # APC9781467987646

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Dr Florian Ion Tiberiu Petrescu, Dr Relly Victoria V Petrescu

Published by Createspace Independent Publishing Platform, United States (2011)

ISBN 10: 1468092405 ISBN 13: 9781468092400

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: Romanian. Brand new Book. Cartea aduce cateva contributii importante in studiul angrenajelor cu roti dintate. Se prezinta o metoda noua de evitare a interferentei dintilor in angrenare, numarul minim de dinti al rotii 1 conducatoare fiind impus de raportul de transmitere al angrenajului cat si de unghiul de angrenare normal pe cercul de divizare, alpha 0. Se prezinta fortele din angrenare, distributia de forte, puterile si modul de determinare a randamentului angrenajelor, atat la mecanismele cu axe fixe cat si la cele cu axe mobile. Seller Inventory # APC9781468092400

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Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

Published by Createspace Independent Publishing Platform, United States (2011)

ISBN 10: 146813082X ISBN 13: 9781468130829

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Quantity Available: 10

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: Romanian. Brand new Book. Energia regenerabila este energia care provine din resursele naturale cum ar fi lumina soarelui, vantul, ploaia, mareele, si caldura geotermala, toate acestea fiind regenerate automat (pe cale naturala). In 2008, circa 19% din consumul total de energie al planetei a provenit din energiile regenerabile, grosul de 13% fiind obtinut din biomasa traditionala, care a fost utilizata in principal pentru incalzire, iar 3.2% a provenit din hidroelectricitate. Restul de 2,7% a fost obtinut prin metode moderne ca (micro hidrocentrale, biomasa moderna, vant, soare, geotermal, biocombustibili, etc), dar toate aceste energii regenerabile moderne sunt intr-o permanenta si rapida crestere. In cadrul energiei globale, cea electrica reprezinta circa 18%, fiind obtinuta in principal prin hidrocentrale (15%), iar restul de 3% prin noile energii regenerabile. Aceasta carte doreste sa propuna noi metode de obtinere a energiilor regenerabile. Dupa 1950 au inceput sa apara uzine nucleare pe fisiune. Energia de fisiune nucleara a reprezentat un rau necesar. Ea a reusit sa lungeasca viata petrolului si sa previna o criza energetica globala foarte grava. Chiar si asa, energia obtinuta din hidrocarburi (petrol, carbune, gaze, biomasa) reprezinta aproximativ 66% din totalul de energie produsa si utilizata astazi la nivel mondial. Daca mentinem acest nivel de productie si consum petrolul se va epuiza in circa 40 ani. Pe de alta parte, astazi, productia de energie nucleara (superioara), bazata pe fuziune nucleara, nu este inca perfect pusa la punct (desi studiile se afla intr-un stadiu foarte avansat). Insa timpul trece repede. Trebuie sa ne grabim sa implementam si sa dezvoltam noile energii regenerabile deja cunoscute, dar si noi posibile energii regenerabile. In aceste conditii, prezenta lucrare vine sa propuna noi posibile surse de energii regenerabile. Seller Inventory # APC9781468130829

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Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

Published by Createspace Independent Publishing Platform, United States (2012)

ISBN 10: 1481083163 ISBN 13: 9781481083164

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About this Item: Createspace Independent Publishing Platform, United States, 2012. Paperback. Condition: New. Language: English. Brand new Book. In the first chapter the authors present an original method to calculate the efficiency of the cams mechanisms. The second chapter presents an original method in determining a general, dynamic and differential equation for the motion of machines and mechanisms, particularized for the mechanisms with rotation cams and followers. The third chapter presents an original method to determine the general dynamics of mechanisms with rotation cams and followers, particularized to the plate translated follower. First, it presents the dynamics kinematics. Then it solves the Lagrange equation and using an original dynamic model with one degree of freedom, with variable internal amortization, it makes the dynamic analysis. The fourth chapter briefly presents an original method for determining the dynamics of mechanisms with rotation cam and translated follower with roll. First, one presents the dynamics kinematics. Then one performs the dynamic analysis of a few models, for some movement laws, imposed on the follower, by the designed cam profile. The fifth chapter presents an original methods to determine the dynamic parameters at the classic distribution, and a new method is presented in the sixth chapter. The seventh chapter presents an original methods to determine the dynamic parameters at the camshaft with rotary cam and translated follower with roll. Seller Inventory # APC9781481083164

More information about this seller | Contact this seller 10.

Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

Published by Createspace Independent Publishing Platform, United States (2012)

ISBN 10: 1481129481 ISBN 13: 9781481129480

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Quantity Available: 10

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About this Item: Createspace Independent Publishing Platform, United States, 2012. Paperback. Condition: New. Language: Romanian. Brand new Book. Motoarele termice cu ardere interna in linie (fie ca lucreaza in patru timpi, ori in doi timpi, motoare de tip Otto, Diesel, sau Lenoir) sunt in general cele mai utilizate. Problema echilibrarii lor este una extrem de importanta pentru buna lor functionare. Exista doua tipuri de echilibrari posibile: statice si dinamice. Echilibrarea statica (totala) face ca suma fortelor inertiale dintr-un mecanism sa fie zero. Exista insa si echilibrari statice partiale. Echilibrarea dinamica inseamna anularea tuturor momentelor (sarcinilor) inertiale din mecanism. Seller Inventory # APC9781481129480

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Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

Published by Createspace Independent Publishing Platform, United States (2013)

ISBN 10: 1494241528 ISBN 13: 9781494241520

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About this Item: Createspace Independent Publishing Platform, United States, 2013. Paperback. Condition: New. Language: English. Brand new Book. LAWS OF ROBOTICS: 1. The robot must not harm humans or through inaction allow anything to happen to a human being. 2. The robot must obey human commands, but only when they do not contradict the Law 1. 3. The robot must protect its existence, but only when self-care law does not contradict the law of 1 or 2. Moving mechanical structures are used increasingly in almost all vital sectors of humanity. The robots are able to process integrated circuits sizes micro and nano, on which the man they can be seen even with electron microscopy. Dyeing parts in toxic environments, working in chemical and radioactive environments, or at depths and pressures at the bottom of huge oceans, or even cosmic space conquest and visiting exo-planets, are now possible, and were turned into from the dream in reality, because mechanical platforms sequential gearbox. Robots were developed and diversified, different aspects, but to-day, they start to be directed on two major categories: systems serial and parallel systems. Parallel systems are more solid, but more difficult to designed and handled, which serial systems were those which have developed the most. In medical operations or radioactive environments are preferred mobile systems parallel to their high accuracy positioning. Seller Inventory # APC9781494241520

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Dr Florian Ion Tiberiu Petrescu, Dr Relly Victoria Virgil Petrescu

Published by Createspace Independent Publishing Platform, United States (2012)

ISBN 10: 1475066139 ISBN 13: 9781475066135

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About this Item: Createspace Independent Publishing Platform, United States, 2012. Paperback. Condition: New. Language: Romanian. Brand new Book. Structurile seriale cele mai utilizate, contin in marea lor majoritate o componenta de baza, 3R, din care doua rotatii se situeaza intr-un plan, astfel incat se poate trece de la studiul spatial la cel plan, usurandu-se astfel mult modalitatile de calcul. Pentru lantul cinematic reprezentand cele doua rotatii plane, se urmareste, structura, geometria, cinematica directa si inversa, trecerea de la miscarea plana la cea spatiala, echilibrarea statica totala, cinetostatica lantului echilibrat, dinamica lantului echilibrat, cinematica dinamica directa si inversa. Seller Inventory # APC9781475066135

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Dr Florian Ion Tiberiu Petrescu, Dr Relly Victoria Virgil Petrescu

Published by Createspace Independent Publishing Platform, United States (2012)

ISBN 10: 1475066139 ISBN 13: 9781475066135

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About this Item: Createspace Independent Publishing Platform, United States, 2012. Paperback. Condition: New. Language: Romanian. Brand new Book. Structurile seriale cele mai utilizate, contin in marea lor majoritate o componenta de baza, 3R, din care doua rotatii se situeaza intr-un plan, astfel incat se poate trece de la studiul spatial la cel plan, usurandu-se astfel mult modalitatile de calcul. Pentru lantul cinematic reprezentand cele doua rotatii plane, se urmareste, structura, geometria, cinematica directa si inversa, trecerea de la miscarea plana la cea spatiala, echilibrarea statica totala, cinetostatica lantului echilibrat, dinamica lantului echilibrat, cinematica dinamica directa si inversa. Seller Inventory # APC9781475066135

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Dr Florian Ion Tiberiu Petrescu, Dr Relly Victoria Virgil Petrescu

Published by Createspace Independent Publishing Platform, United States (2012)

ISBN 10: 1480204889 ISBN 13: 9781480204881

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About this Item: Createspace Independent Publishing Platform, United States, 2012. Paperback. Condition: New. Language: Romanian. Brand new Book. Dezvoltarea si diversificarea autovehiculelor rutiere si a vehiculelor, mai ales cea a automobilelor, impreuna cu motoarele termice, in special cele cu ardere interna (fiind mai compacte, mai robuste, mai independente, mai fiabile, mai puternice, mai dinamice, etc.), a fortat si dezvoltarea intr-un ritm mai alert a dispozitivelor, mecanismelor, si ansamblurilor componente. Cele mai studiate fiind trenurile de putere si cel al transmisiei. Problema randamentului foarte scazut, a noxelor mari si a consumului foarte mare de putere si de combustibil, a fost mult ameliorata si reglementata in ultimii 20-30 ani, prin dezvoltarea si introducerea unor mecanisme motoare si de distributie moderne, care pe langa randamente mai ridicate (ce aduc imediat o mare economie de combustibili) realizeaza si o functionare optima, fara zgomote, fara vibratii, cu noxe mult diminuate, in conditiile in care turatia motorului maxima posibila a crescut de la 5000-6000 la circa 30000 [rot/min]. Astazi toate motoarele cu ardere interna (dar si cele cu ardere externa care mai sunt utilizate) functioneaza in general la standarde ridicate, cu consumuri mici de combustibili, cu nivele scazute de vibratii si zgomote, cu emisii de noxe extrem de reduse, comform reglementarilor actuale care sunt si ele din ce in ce mai pretentioase. Rezervele de petrol si cele energetice actuale ale omenirii sunt limitate. Pana la implementarea de noi surse energetice (care sa preia controlul real in locul combustibililor fosilici) o sursa alternativa reala de energie si de combustibili este chiar "scaderea consumului de combustibil al unui autovehicul," fie ca vom arde petrol, gaze si derivati petrolieri, fie ca vom implementa intr-o prima faza biocombustibilii (lucru ce s-a si realizat in unele tari, cum ar fi Brazilia, USA, Germania, etc), iar mai tarziu si hidrogenul (extras din apa). Aspectul cel mai grav al acestui fapt (care pare sa fi trecut neobservat de marile guverne ale lumii comtemporane) este ca poluarea si consumul datorate arderilor suplimentare de petrol, produse petroliere si gaze, in centrale energetice mondiale, au crescut foarte mult si foarte brusc, datorita consumului sporit de energie electrica obtinuta in mare parte tot din arderea combustibililor clasici, aflati pe cale de disparitie (rezervele de petrol ale Terrei s-ar putea epuiza efectiv in urmatorii 40-50 ani daca continuam tot asa, deoarece deocamdata energiile noi implementate, regenerabile si sustenabile abia daca realizeaza 2-3% nesemnificative dealtfel din productia globala energetica, circa 40% fiind totusi realizate din noii biocombustibili, din biomasa, din energia nucleara obtinuta prin fisiune si din hidrocentrale). Deocamdata energia eoliana, cea solara, cea obtinuta din maree, din valurile marilor si oceanelor, din izvoarele termice (gheizare), pe cale chimica, sau prin diverse alte cai, abia atinge acum circa 1-3% din productia mondiala de energie (inclusiv cea electrica). Generalizand brusc si automobilele electrice (desi nu suntem inca pregatiti real pentru acest lucru), vom da o noua lovitura rezervelor de petrol si gaze. Cine v-a putea casa rapid un parc auto de un miliard de autovehicule pentru a-l inlocui in totalitate cu unul electrificat? Cu ce bani, cand eforturile sporite ale guvernelor tuturor tarilor, abia reusesc sa retraga din circulatie anual circa 1-2% din parcul de autovehicule care depasesc 20-30 ani de cand sunt in circulatie? Dealtfel, incep deja sa apara si combustibilii de tip bemzina sau motorina obtinuti sintetic, inclusiv prin extragerea carbonului din aerul atmosferic, combustibilii obtinuti prin curatarea aerului inconjurator adaugandu-se astfel celor produsi din alge, plante, uleiuri vegetale, alcooli, etc. Hidrogenul se va putea in viitor disocia direct din apa, chiar pe vehicul, nemaifiind necesara stocarea hidrogenului. Seller Inventory # APC9781480204881

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Dr Florian Ion Tiberiu Petrescu, Dr Relly Victoria Virgil Petrescu

Published by Createspace Independent Publishing Platform, United States (2012)

ISBN 10: 1480204889 ISBN 13: 9781480204881

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About this Item: Createspace Independent Publishing Platform, United States, 2012. Paperback. Condition: New. Language: Romanian. Brand new Book. Dezvoltarea si diversificarea autovehiculelor rutiere si a vehiculelor, mai ales cea a automobilelor, impreuna cu motoarele termice, in special cele cu ardere interna (fiind mai compacte, mai robuste, mai independente, mai fiabile, mai puternice, mai dinamice, etc.), a fortat si dezvoltarea intr-un ritm mai alert a dispozitivelor, mecanismelor, si ansamblurilor componente. Cele mai studiate fiind trenurile de putere si cel al transmisiei. Problema randamentului foarte scazut, a noxelor mari si a consumului foarte mare de putere si de combustibil, a fost mult ameliorata si reglementata in ultimii 20-30 ani, prin dezvoltarea si introducerea unor mecanisme motoare si de distributie moderne, care pe langa randamente mai ridicate (ce aduc imediat o mare economie de combustibili) realizeaza si o functionare optima, fara zgomote, fara vibratii, cu noxe mult diminuate, in conditiile in care turatia motorului maxima posibila a crescut de la 5000-6000 la circa 30000 [rot/min]. Astazi toate motoarele cu ardere interna (dar si cele cu ardere externa care mai sunt utilizate) functioneaza in general la standarde ridicate, cu consumuri mici de combustibili, cu nivele scazute de vibratii si zgomote, cu emisii de noxe extrem de reduse, comform reglementarilor actuale care sunt si ele din ce in ce mai pretentioase. Rezervele de petrol si cele energetice actuale ale omenirii sunt limitate. Pana la implementarea de noi surse energetice (care sa preia controlul real in locul combustibililor fosilici) o sursa alternativa reala de energie si de combustibili este chiar "scaderea consumului de combustibil al unui autovehicul," fie ca vom arde petrol, gaze si derivati petrolieri, fie ca vom implementa intr-o prima faza biocombustibilii (lucru ce s-a si realizat in unele tari, cum ar fi Brazilia, USA, Germania, etc), iar mai tarziu si hidrogenul (extras din apa). Aspectul cel mai grav al acestui fapt (care pare sa fi trecut neobservat de marile guverne ale lumii comtemporane) este ca poluarea si consumul datorate arderilor suplimentare de petrol, produse petroliere si gaze, in centrale energetice mondiale, au crescut foarte mult si foarte brusc, datorita consumului sporit de energie electrica obtinuta in mare parte tot din arderea combustibililor clasici, aflati pe cale de disparitie (rezervele de petrol ale Terrei s-ar putea epuiza efectiv in urmatorii 40-50 ani daca continuam tot asa, deoarece deocamdata energiile noi implementate, regenerabile si sustenabile abia daca realizeaza 2-3% nesemnificative dealtfel din productia globala energetica, circa 40% fiind totusi realizate din noii biocombustibili, din biomasa, din energia nucleara obtinuta prin fisiune si din hidrocentrale). Deocamdata energia eoliana, cea solara, cea obtinuta din maree, din valurile marilor si oceanelor, din izvoarele termice (gheizare), pe cale chimica, sau prin diverse alte cai, abia atinge acum circa 1-3% din productia mondiala de energie (inclusiv cea electrica). Generalizand brusc si automobilele electrice (desi nu suntem inca pregatiti real pentru acest lucru), vom da o noua lovitura rezervelor de petrol si gaze. Cine v-a putea casa rapid un parc auto de un miliard de autovehicule pentru a-l inlocui in totalitate cu unul electrificat? Cu ce bani, cand eforturile sporite ale guvernelor tuturor tarilor, abia reusesc sa retraga din circulatie anual circa 1-2% din parcul de autovehicule care depasesc 20-30 ani de cand sunt in circulatie? Dealtfel, incep deja sa apara si combustibilii de tip bemzina sau motorina obtinuti sintetic, inclusiv prin extragerea carbonului din aerul atmosferic, combustibilii obtinuti prin curatarea aerului inconjurator adaugandu-se astfel celor produsi din alge, plante, uleiuri vegetale, alcooli, etc. Hidrogenul se va putea in viitor disocia direct din apa, chiar pe vehicul, nemaifiind necesara stocarea hidrogenului. Seller Inventory # APC9781480204881

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Dr Florian Ion Tiberiu Petrescu, Dr Relly Victoria V Petrescu

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ISBN 10: 1468030418 ISBN 13: 9781468030419

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: Romanian. Brand new Book. Cartea prezinta sistemele planetare mecanice cunoscute, dar si altele mai rare; istoric, structura, geometrie, cinematica, iar dinamic se determina randamentul mecanismelor de tip planetar. Formula exacta de determinare a randamentului la planetare este prezentata in premiera, pana acum circuland diferite variante aproximative, cea mai raspandita fiind cea a scolii rusesti de mecanisme. Importanta determinarii exacte a randamentului real al mecanismelor planetare deriva din faptul ca ele pot fi utilizate in aviatie, la autovehicule, in robotica, aplicatii medicale si militare, etc, fiind uneori extrem de important sa avem randamente ridicate in functionare; vezi cazul cutiilor automate de viteze, din aeronautica, sau din domeniul auto. Seller Inventory # APC9781468030419

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Dr Florian Ion Tiberiu Petrescu, Dr Relly Victoria V Petrescu

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ISBN 10: 1468030418 ISBN 13: 9781468030419

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: Romanian. Brand new Book. Cartea prezinta sistemele planetare mecanice cunoscute, dar si altele mai rare; istoric, structura, geometrie, cinematica, iar dinamic se determina randamentul mecanismelor de tip planetar. Formula exacta de determinare a randamentului la planetare este prezentata in premiera, pana acum circuland diferite variante aproximative, cea mai raspandita fiind cea a scolii rusesti de mecanisme. Importanta determinarii exacte a randamentului real al mecanismelor planetare deriva din faptul ca ele pot fi utilizate in aviatie, la autovehicule, in robotica, aplicatii medicale si militare, etc, fiind uneori extrem de important sa avem randamente ridicate in functionare; vezi cazul cutiilor automate de viteze, din aeronautica, sau din domeniul auto. Seller Inventory # APC9781468030419

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Dr Relly Victoria Petrescu, Dr Florian Ion Petrescu

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ISBN 10: 1481826883 ISBN 13: 9781481826884

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About this Item: Createspace Independent Publishing Platform, United States, 2012. Paperback. Condition: New. Language: English. Brand new Book. Lockheed Martin (NYSE: LMT) is an American global aerospace, defense, security, and advanced technology company with worldwide interests. It was formed by the merger of Lockheed Corporation with Martin Marietta in March 1995. It is headquartered in Bethesda, Maryland, in the Washington Metropolitan Area. Lockheed Martin employs 123,000 people worldwide. Robert J. Stevens is the current Chairman and Chief Executive Officer. Lockheed Martin is one of the world's largest defense contractors; In 2009, 74% of Lockheed Martin's revenues came from military sales. It received 7.1% of the funds paid out by the Pentagon. Lockheed Martin operates in four business segments. These comprise, with respective percentages of 2009 total net sales of $45.2 billion, Aeronautics (27%), Electronic Systems (27%), Information Systems & Global Solutions (27%), and Space Systems (19%). In 2009 US Government contracts accounted for $38.4 billion (85%), foreign government contracts $5.8 billion (13%), and commercial and other contracts for $900 million (2%). In both 2009 and 2008 the company topped the list of US Federal Contractors. The company has received the Collier Trophy six times. Most recently (in 2001) for being part of developing the X-35/F-35B LiftFan Propulsion System, and again in 2006 for leading the team that developed the F-22 Raptor fighter jet. Lockheed Martin is currently developing the F-35 Lightning II. Merger talks between Lockheed Corporation and Martin Marietta began in March 1994, with the companies announcing their $10 billion planned merger on August 30, 1994. The deal was finalized on March 15, 1995 when the two companies' shareholders approved the merger. The segments of the two companies not retained by the new company formed the basis for the present L-3 Communications, a mid-size defense contractor in its own right. Lockheed Martin later spun off the materials company Martin Marietta Materials. Both companies contributed important products to the new portfolio. Lockheed products included the Trident missile, P-3 Orion, F-16 Fighting Falcon, F-22 Raptor, C-130 Hercules, A-4AR Fightinghawk and the DSCS-3 satellite. Martin Marietta products included Titan rockets, Sandia National Laboratories (management contract acquired in 1993), Space Shuttle External Tank, Viking 1 and Viking 2 landers, the Transfer Orbit Stage (under subcontract to Orbital Sciences Corporation) and various satellite models. On April 22, 1996, Lockheed Martin completed the acquisition of Loral Corporation's defense electronics and system integration businesses for $9.1 billion, the deal having been announced in January. The remainder of Loral became Loral Space & Communications. Lockheed Martin abandoned plans for a $8.3 billion merger with Northrop Grumman on July 16, 1998, due to government concerns over the potential strength of the new group; Lockheed/Northrop would have had control of 25% of the Department of Defense's procurement budget. Lockheed Martin provided NASA with measurements in US Customary force units when metric was expected, resulting in the loss of the Mars Climate Orbiter at a cost of $125 million. The cost for spacecraft development was $193.1 million. In May 2001, Lockheed Martin sold Lockheed Martin Control Systems to BAE Systems. On November 27, 2000, Lockheed completed the sale of its Aerospace Electronic Systems business to BAE Systems for $1.67 billion, a deal announced in July 2000. This group encompassed Sanders Associates, Fairchild Systems, and Lockheed Martin Space Electronics & Communications. In 2001, Lockheed Martin won the contract to build the F-35 Lightning II; this was the largest fighter aircraft procurement project since the F-16, with an initial order of 3,000 worth some $200 billion before export orders. In 2001, Lockheed Martin settled a nine year investigation conducted by NASA's Office of Inspector General with the assistance of the Defense Contract Audit Agency. Seller Inventory # APC9781481826884

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Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

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ISBN 10: 1467913774 ISBN 13: 9781467913775

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: English. Brand new Book. Mechanical Engineering Design is the first edition of a largest old preocupation of the authors in this field. It presents the design of the Otto Motors, kinematics and dynamics, a new Otto engine, the efficiency of the engines with internal combustion, the design of the V engines, the design of the distribution mechanisms, the design of the power train and the design of the drivetrain. It presents as well the design of the planetary trains with their real efficiency. The book has 14 chapters. Since the predominant component in all chapters is the dynamics, the book might be called and dynamic design in mechanical engineering. Seller Inventory # APC9781467913775

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Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

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ISBN 10: 1467913774 ISBN 13: 9781467913775

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: English. Brand new Book. Mechanical Engineering Design is the first edition of a largest old preocupation of the authors in this field. It presents the design of the Otto Motors, kinematics and dynamics, a new Otto engine, the efficiency of the engines with internal combustion, the design of the V engines, the design of the distribution mechanisms, the design of the power train and the design of the drivetrain. It presents as well the design of the planetary trains with their real efficiency. The book has 14 chapters. Since the predominant component in all chapters is the dynamics, the book might be called and dynamic design in mechanical engineering. Seller Inventory # APC9781467913775

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Dr Relly Victoria Petrescu, Dr Florian Ion Petrescu

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ISBN 10: 1481826883 ISBN 13: 9781481826884

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About this Item: Createspace Independent Publishing Platform, United States, 2012. Paperback. Condition: New. Language: English. Brand new Book. Lockheed Martin (NYSE: LMT) is an American global aerospace, defense, security, and advanced technology company with worldwide interests. It was formed by the merger of Lockheed Corporation with Martin Marietta in March 1995. It is headquartered in Bethesda, Maryland, in the Washington Metropolitan Area. Lockheed Martin employs 123,000 people worldwide. Robert J. Stevens is the current Chairman and Chief Executive Officer. Lockheed Martin is one of the world's largest defense contractors; In 2009, 74% of Lockheed Martin's revenues came from military sales. It received 7.1% of the funds paid out by the Pentagon. Lockheed Martin operates in four business segments. These comprise, with respective percentages of 2009 total net sales of $45.2 billion, Aeronautics (27%), Electronic Systems (27%), Information Systems & Global Solutions (27%), and Space Systems (19%). In 2009 US Government contracts accounted for $38.4 billion (85%), foreign government contracts $5.8 billion (13%), and commercial and other contracts for $900 million (2%). In both 2009 and 2008 the company topped the list of US Federal Contractors. The company has received the Collier Trophy six times. Most recently (in 2001) for being part of developing the X-35/F-35B LiftFan Propulsion System, and again in 2006 for leading the team that developed the F-22 Raptor fighter jet. Lockheed Martin is currently developing the F-35 Lightning II. Merger talks between Lockheed Corporation and Martin Marietta began in March 1994, with the companies announcing their $10 billion planned merger on August 30, 1994. The deal was finalized on March 15, 1995 when the two companies' shareholders approved the merger. The segments of the two companies not retained by the new company formed the basis for the present L-3 Communications, a mid-size defense contractor in its own right. Lockheed Martin later spun off the materials company Martin Marietta Materials. Both companies contributed important products to the new portfolio. Lockheed products included the Trident missile, P-3 Orion, F-16 Fighting Falcon, F-22 Raptor, C-130 Hercules, A-4AR Fightinghawk and the DSCS-3 satellite. Martin Marietta products included Titan rockets, Sandia National Laboratories (management contract acquired in 1993), Space Shuttle External Tank, Viking 1 and Viking 2 landers, the Transfer Orbit Stage (under subcontract to Orbital Sciences Corporation) and various satellite models. On April 22, 1996, Lockheed Martin completed the acquisition of Loral Corporation's defense electronics and system integration businesses for $9.1 billion, the deal having been announced in January. The remainder of Loral became Loral Space & Communications. Lockheed Martin abandoned plans for a $8.3 billion merger with Northrop Grumman on July 16, 1998, due to government concerns over the potential strength of the new group; Lockheed/Northrop would have had control of 25% of the Department of Defense's procurement budget. Lockheed Martin provided NASA with measurements in US Customary force units when metric was expected, resulting in the loss of the Mars Climate Orbiter at a cost of $125 million. The cost for spacecraft development was $193.1 million. In May 2001, Lockheed Martin sold Lockheed Martin Control Systems to BAE Systems. On November 27, 2000, Lockheed completed the sale of its Aerospace Electronic Systems business to BAE Systems for $1.67 billion, a deal announced in July 2000. This group encompassed Sanders Associates, Fairchild Systems, and Lockheed Martin Space Electronics & Communications. In 2001, Lockheed Martin won the contract to build the F-35 Lightning II; this was the largest fighter aircraft procurement project since the F-16, with an initial order of 3,000 worth some $200 billion before export orders. In 2001, Lockheed Martin settled a nine year investigation conducted by NASA's Office of Inspector General with the assistance of the Defense Contract Audit Agency. Seller Inventory # APC9781481826884

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Dr Florian Ion Tiberiu Petrescu, Dr Relly Victoria V Petrescu

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ISBN 10: 1468052659 ISBN 13: 9781468052657

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: Romanian. Brand new Book. Prezenta carte isi propune sa rezolve problemele principale de dinamica, ce apar la mecanismele de distributie ale automobilelor si autovehiculelor rutiere. Sunt modulate si luate in calcul mai multe tipuri de mecanisme de distributie cu cama si tachet. Se porneste cu mecanismul clasic de distributie, avand cama rotativa si tachetul de translatie plat (cu talpa), construit clasic cu un unghi de 90 [grade sexazecimale] intre talpa si axa de translatie a tachetului. Se continua cu mecanismul de distributie care are cama rotativa si tachetul de translatie cu rola. Urmatorul modul prezentat pastreaza cama rotativa si tachetul cu rola, dar acesta din urma nu mai translateaza ci se roteste, rotatia fiind sub forma unui balans. Ultimul modul de distributie studiat in cadrul cartii are tot cama de rotatie si tachetul de rotatie (balansier) plat (cu talpa). La fiecare modul se prezinta pe scurt, geometria sa, cinematica, cinematica de precizie, cinetostatica (fortele care actioneaza in cupla mecanismului de distributie considerat), si dinamica mecanismului respectiv, care cuprinde doua aspecte principale, randamentul mecanismului, si cinematica sa dinamica (cinematica reala a mecanismului de distributie, influentata de toti parametrii functionali, inclusiv de fortele de inertie). The first chapter presents a brief history of the emergence and development of the internal combustion engines, because they have developed the distribution mechanisms. The second chapter presents some dynamic models used to study the mechanisms of distribution. Chapter 3 presents the actual dynamics of distribution mechanisms, exemplified by the traditional mechanism with rotary cam and follower (flat, with translant movement). Chapter 4 makes the dynamic analysis for traditional distribution system. Chapter 5, dealing with dynamic study of the mechanism with rotary cam and translant follower with roller. Chapter 6, dealing with F dynamic module, who is still as well with a roller follower, but which has a rotating movement. Chapter 7 (the last) presents more focused, module H, which representing the rotary cam with flat rotating follower. The book is written in Romanian. Seller Inventory # APC9781468052657

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Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

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ISBN 10: 1481129341 ISBN 13: 9781481129343

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About this Item: Createspace Independent Publishing Platform, United States, 2012. Paperback. Condition: New. Language: Romanian. Brand new Book. Motoarele termice cu ardere interna in linie (fie ca lucreaza in patru timpi, ori in doi timpi, motoare de tip Otto, Diesel, sau Lenoir) sunt in general cele mai utilizate. Problema echilibrarii lor este una extrem de importanta pentru buna lor functionare. Exista doua tipuri de echilibrari posibile: statice si dinamice. Echilibrarea statica (totala) face ca suma fortelor inertiale dintr-un mecanism sa fie zero. Exista insa si echilibrari statice partiale. Echilibrarea dinamica inseamna anularea tuturor momentelor (sarcinilor) inertiale din mecanism. Partile din relatiile fortelor care sunt egale in modul dar au semne contrare se anuleaza reciproc producand o echilibrare statica (partiala) a motorului. Celelalte doua parti din expresiile fortelor care au acelasi semn, desi sunt egale nu se anuleaza reciproc ci dimpotriva se aduna, producand o dezechilibrare statica (partiala) a motorului. Motoarele in V sunt dificil de echilibrat, deoarece au doi cilindri cu doua pistoane pe acelasi fus maneton. Fiecare din ele trage pe directia lui si produce forte si momente de inertie pe directii total diferite situate in plane diferite, foarte greu de echilibrat chiar si partial, atat static cat si dinamic. Seller Inventory # APC9781481129343

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Dr Florian Ion Tiberiu Petrescu, Dr Relly Victoria V Petrescu

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ISBN 10: 1468101447 ISBN 13: 9781468101447

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: Romanian. Brand new Book. Lucrarea reprezinta o viziune stiintifica, unitara, generala, cuprinzatoare si echidistanta a principalelor probleme pe care le ridica sistemele mecanice, mobile, seriale si paralele. Se face o prezentare generala, urmata de studiul geometro-cinematic separat al structurilor seriale si paralele. Se continua cu o introducere in dinamica acestor sisteme. Structura sistemelor paralele este vizualizata pe scurt. La sistemele seriale se studiaza atat cinematica directa cat si cea indirecta, in vreme ce la sistemele paralele se urmareste numai cinematica indirecta (aceasta fiind mult mai utila). Prezentarea metodelor de baza este strans legata de calculul matricial, care este introdus pas cu pas pentru usurarea intelegerii fiecarei secvente. Cartea este structurata in 14 capitole, care au avut ca baza de pornire cele 14 cursuri fundamentale pregatite pentru masteranzii de la disciplinele mecatronica, roboti industriali, manipulatori, sudare automatizata, etc. Lucrarea se adreseaza in egala masura tuturor specialistilor, si viitorilor specialisti (studenti) care lucreaza in aceste domenii, sau au tangente cu aceste frumoase discipline: mecatronica, robotica, automatizarea proceselor. Ea poate fi un instrument pretios si pentru proiectantii (designerii) acestor sisteme, pentru cei care construiesc, achizitioneaza, utilizeaza, sau intretin sisteme mecanice mobile seriale sau paralele. Autorii doresc sa multumeasca pe aceasta cale colegilor lor si tuturor celor care au contribuit direct sau indirect la aparitia acestei lucrari. Un gand pios ne aduce aminte de inaintasii nostrii, cu care am invatat, ne-am pregatit si format profesional, cu care am avut cinstea, dar si norocul de a lucra la Universitatea Politehnica din Bucuresti (chiar multi ani de zile), langa care am stat la frumoasele seminarii de robotica, din cadrul catedrei de Teoria Mecanismelor si a Robotilor, impreuna cu care am participat la Simpozioane, Conferinte si Congrese Nationale si Internationale, dar care acum nu mai sunt printre noi, si anume Profesorii Universitari, doctori docenti, ingineri: Acad. Nicolae MANOLESCU, Vicepresedinte IFToMM Christian PELECUDI, Ambasador Radu BOGDAN. Un gand de adanca multumire ni se indreapta si catre cei care ne-au sprijinit pas cu pas intreaga noastra activitate stiintifica, didactica si de cercetare, Profesorii Universitari Dr. Ingineri: Paun ANTONESCU, Adriana COMANESCU, Barbu GRECU, Victor MOISE, Leonard BUDA, Mihai DRANGA. Cu stima si respect, autorii. Seller Inventory # APC9781468101447

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Dr Florian Ion Tiberiu Petrescu, Dr Relly Victoria V Petrescu

Published by Createspace Independent Publishing Platform, United States (2011)

ISBN 10: 1468052659 ISBN 13: 9781468052657

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: Romanian. Brand new Book. Prezenta carte isi propune sa rezolve problemele principale de dinamica, ce apar la mecanismele de distributie ale automobilelor si autovehiculelor rutiere. Sunt modulate si luate in calcul mai multe tipuri de mecanisme de distributie cu cama si tachet. Se porneste cu mecanismul clasic de distributie, avand cama rotativa si tachetul de translatie plat (cu talpa), construit clasic cu un unghi de 90 [grade sexazecimale] intre talpa si axa de translatie a tachetului. Se continua cu mecanismul de distributie care are cama rotativa si tachetul de translatie cu rola. Urmatorul modul prezentat pastreaza cama rotativa si tachetul cu rola, dar acesta din urma nu mai translateaza ci se roteste, rotatia fiind sub forma unui balans. Ultimul modul de distributie studiat in cadrul cartii are tot cama de rotatie si tachetul de rotatie (balansier) plat (cu talpa). La fiecare modul se prezinta pe scurt, geometria sa, cinematica, cinematica de precizie, cinetostatica (fortele care actioneaza in cupla mecanismului de distributie considerat), si dinamica mecanismului respectiv, care cuprinde doua aspecte principale, randamentul mecanismului, si cinematica sa dinamica (cinematica reala a mecanismului de distributie, influentata de toti parametrii functionali, inclusiv de fortele de inertie). The first chapter presents a brief history of the emergence and development of the internal combustion engines, because they have developed the distribution mechanisms. The second chapter presents some dynamic models used to study the mechanisms of distribution. Chapter 3 presents the actual dynamics of distribution mechanisms, exemplified by the traditional mechanism with rotary cam and follower (flat, with translant movement). Chapter 4 makes the dynamic analysis for traditional distribution system. Chapter 5, dealing with dynamic study of the mechanism with rotary cam and translant follower with roller. Chapter 6, dealing with F dynamic module, who is still as well with a roller follower, but which has a rotating movement. Chapter 7 (the last) presents more focused, module H, which representing the rotary cam with flat rotating follower. The book is written in Romanian. Seller Inventory # APC9781468052657

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Dr Florian Ion Petrescu, Dr Relly Victoria Petrescu

Published by Createspace Independent Publishing Platform, United States (2012)

ISBN 10: 1481129341 ISBN 13: 9781481129343

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About this Item: Createspace Independent Publishing Platform, United States, 2012. Paperback. Condition: New. Language: Romanian. Brand new Book. Motoarele termice cu ardere interna in linie (fie ca lucreaza in patru timpi, ori in doi timpi, motoare de tip Otto, Diesel, sau Lenoir) sunt in general cele mai utilizate. Problema echilibrarii lor este una extrem de importanta pentru buna lor functionare. Exista doua tipuri de echilibrari posibile: statice si dinamice. Echilibrarea statica (totala) face ca suma fortelor inertiale dintr-un mecanism sa fie zero. Exista insa si echilibrari statice partiale. Echilibrarea dinamica inseamna anularea tuturor momentelor (sarcinilor) inertiale din mecanism. Partile din relatiile fortelor care sunt egale in modul dar au semne contrare se anuleaza reciproc producand o echilibrare statica (partiala) a motorului. Celelalte doua parti din expresiile fortelor care au acelasi semn, desi sunt egale nu se anuleaza reciproc ci dimpotriva se aduna, producand o dezechilibrare statica (partiala) a motorului. Motoarele in V sunt dificil de echilibrat, deoarece au doi cilindri cu doua pistoane pe acelasi fus maneton. Fiecare din ele trage pe directia lui si produce forte si momente de inertie pe directii total diferite situate in plane diferite, foarte greu de echilibrat chiar si partial, atat static cat si dinamic. Seller Inventory # APC9781481129343

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Dr Florian Ion Tiberiu Petrescu, Dr Relly Victoria V Petrescu

Published by Createspace Independent Publishing Platform, United States (2011)

ISBN 10: 1468101447 ISBN 13: 9781468101447

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About this Item: Createspace Independent Publishing Platform, United States, 2011. Paperback. Condition: New. Language: Romanian. Brand new Book. Lucrarea reprezinta o viziune stiintifica, unitara, generala, cuprinzatoare si echidistanta a principalelor probleme pe care le ridica sistemele mecanice, mobile, seriale si paralele. Se face o prezentare generala, urmata de studiul geometro-cinematic separat al structurilor seriale si paralele. Se continua cu o introducere in dinamica acestor sisteme. Structura sistemelor paralele este vizualizata pe scurt. La sistemele seriale se studiaza atat cinematica directa cat si cea indirecta, in vreme ce la sistemele paralele se urmareste numai cinematica indirecta (aceasta fiind mult mai utila). Prezentarea metodelor de baza este strans legata de calculul matricial, care este introdus pas cu pas pentru usurarea intelegerii fiecarei secvente. Cartea este structurata in 14 capitole, care au avut ca baza de pornire cele 14 cursuri fundamentale pregatite pentru masteranzii de la disciplinele mecatronica, roboti industriali, manipulatori, sudare automatizata, etc. Lucrarea se adreseaza in egala masura tuturor specialistilor, si viitorilor specialisti (studenti) care lucreaza in aceste domenii, sau au tangente cu aceste frumoase discipline: mecatronica, robotica, automatizarea proceselor. Ea poate fi un instrument pretios si pentru proiectantii (designerii) acestor sisteme, pentru cei care construiesc, achizitioneaza, utilizeaza, sau intretin sisteme mecanice mobile seriale sau paralele. Autorii doresc sa multumeasca pe aceasta cale colegilor lor si tuturor celor care au contribuit direct sau indirect la aparitia acestei lucrari. Un gand pios ne aduce aminte de inaintasii nostrii, cu care am invatat, ne-am pregatit si format profesional, cu care am avut cinstea, dar si norocul de a lucra la Universitatea Politehnica din Bucuresti (chiar multi ani de zile), langa care am stat la frumoasele seminarii de robotica, din cadrul catedrei de Teoria Mecanismelor si a Robotilor, impreuna cu care am participat la Simpozioane, Conferinte si Congrese Nationale si Internationale, dar care acum nu mai sunt printre noi, si anume Profesorii Universitari, doctori docenti, ingineri: Acad. Nicolae MANOLESCU, Vicepresedinte IFToMM Christian PELECUDI, Ambasador Radu BOGDAN. Un gand de adanca multumire ni se indreapta si catre cei care ne-au sprijinit pas cu pas intreaga noastra activitate stiintifica, didactica si de cercetare, Profesorii Universitari Dr. Ingineri: Paun ANTONESCU, Adriana COMANESCU, Barbu GRECU, Victor MOISE, Leonard BUDA, Mihai DRANGA. Cu stima si respect, autorii. Seller Inventory # APC9781468101447

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Florian Ion Petrescu, Relly Victoria Petrescu

Published by Books On Demand (2012)

ISBN 10: 3848230771 ISBN 13: 9783848230778

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About this Item: Books On Demand, 2012. Paperback. Condition: Used: Good. Seller Inventory # SONG3848230771

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Dr Florian Ion Tiberiu Petrescu, Dr Relly Victoria Petrescu

Published by BOOKS ON DEMAND, United States (2012)

ISBN 10: 3848209322 ISBN 13: 9783848209323

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About this Item: BOOKS ON DEMAND, United States, 2012. Paperback. Condition: New. Language: English. Brand new Book. The Northrop Grumman (formerly Ryan Aeronautical) RQ-4 Global Hawk (known as Tier II+ during development) is an unmanned aerial vehicle (UAV) used by the United States Air Force and Navy and the German Air Force as a surveillance aircraft. The Northrop Grumman B-2 Spirit (also known as the Stealth Bomber) is an American strategic bomber, featuring low observable stealth technology designed for penetrating dense anti-aircraft defenses; it is able to deploy both conventional and nuclear weapons. The bomber has a crew of two and can drop up to eighty 500 lb (230 kg)-class JDAM GPS-guided bombs, or sixteen 2,400 lb (1,100 kg) B83 nuclear bombs. The B-2 is the only aircraft that can carry large air-to-surface standoff weapons in a stealth configuration. The Northrop T-38 Talon is a twin-engine supersonic jet trainer. It was the world's first supersonic trainer and is also the most produced. The T-38 remains in service as of 2012 in air forces throughout the world. The United States Air Force (USAF) is the largest operator of the T-38. In addition to training USAF pilots, the T-38 is used by NASA. The Grumman C-2 Greyhound is a twin-engine, high-wing cargo aircraft, designed to carry supplies and mail to and from aircraft carriers of the United States Navy. Its primary mission is carrier onboard delivery (COD). The aircraft provides critical logistics support to carrier strike groups. The aircraft is mainly used to transport high-priority cargo, mail and passengers between carriers and shore bases, and can deliver items like jet engines, and special stores. The Grumman E-2 Hawkeye is an American all-weather, aircraft carrier-capable tactical airborne early warning (AEW) aircraft. This twin-turboprop aircraft was designed and developed during the late 1950s and early 1960s by the Grumman Aircraft Company for the United States Navy as a replacement for the earlier E-1 Tracer, which was rapidly becoming obsolete. The aircraft. Seller Inventory # LIB9783848209323

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