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Frases de Qian Xuesen

Qian Xuesen foi um engenheiro chinês.

Realizou trabalhos fundamentais para os programas espaciais e de mísseis dos Estados Unidos e da República Popular da China. Documentos históricos dos Estados Unidos normalmente referem-se a ele com a ortografia segundo a pronúncia de seu nome, Hsue-Shen Tsien ou H.S. Tsien.Durante a década de 1940 Qian foi um dos fundadores do Jet Propulsion Laboratory no Instituto de Tecnologia da Califórnia, Durante

a segunda ameaça vermelha nos Estados Unidos na década de 1950, o governo dos Estados Unidos acusou Qian de ter simpatias comunistas, e ele foi destituído de sua credencial de segurança em 1950. Qian então decidiu retornar à China, mas foi detido na Terminal Island próximo a Los Angeles. Apos passar 5 anos em prisão domiciliar virtual, Qian foi solto em 1955, em troca da repatriação de pilotos estadunidenses capturados durante a Guerra da Coreia. Notificado por autoridades estadunidenses que estava livre para partir, Qian imediatamente providenciou sua partida, indo para a China em setembro de 1955, no navio de passageiros SS President Cleveland da American President Lines, via Hong Kong. Ele retornou a seu país para liderar o programa de foguetes chinês, e se tornou conhecido como o "pai dos foguetes chineses" .O asteroide 3763 Qianxuesen e a malfadada nave espacial Tsien do livro de ficção científica 2010: Odyssey Two levam seu nome. Wikipedia  

✵ 11. Dezembro 1911 – 31. Outubro 2009
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Qian Xuesen: 4   citações 0   Curtidas

Qian Xuesen: Frases em inglês

“An engineering science aims to organize the design principles used in engineering practice into a discipline and thus to exhibit the similarities between different areas of engineering practice and to emphasize the power of fundamental concepts. In short, an engineering science is predominated by theoretical analysis and very often uses the tool of advanced mathematics.”

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Qian Xuesen

Fonte: Engineering cybernetics, (1954), p. vii

“The purpose of "Engineering Cybernetics" is then to study those parts of the broad science of cybernetics which have direct engineering applications in designing controlled or guided systems. It certainly includes such topics usually treated in books on servomechanisms. But a wider range of topics is only one difference between engineering cybernetics and servomechanisms engineering. A deeper - and thus more important - difference lies in the fact that engineering cybernetics is an engineering science, while servomechanisms engineering is an engineering practice.”

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Qian Xuesen

Fonte: Engineering cybernetics, (1954), p. vii

“I do not plan to come back. I have no reason to come back.. I plan to do my best to help the Chinese people build up the nation to where they can live with dignity and happiness.”

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Qian Xuesen

Qian (1955) to reporters after returning to China. Cited in: " Qian Xuesen dies at 98; rocket scientist helped establish Jet Propulsion Laboratory http://www.latimes.com/news/nationworld/nation/la-me-qian-xuesen1-2009nov01,0,2865408.story" Obituary Nov 1, 2009

“The celebrated physicist and mathematician A. M. Ampere coined the word cybernetique to mean the science of civil government (Part II of "Essai sur la philosophic des sciences", 1845, Paris). Ampere's grandiose scheme of political sciences has not, and perhaps never will, come to fruition. In the meantime, conflict between governments with the use of force greatly accelerated the development of another branch of science, the science of control and guidance of mechanical and electrical systems. It is thus perhaps ironical that Ampere's word should be borrowed by N. Wiener to name this new science, so important to modern warfare. The "cybernetics" of Wiener ("Cybernetics, or Control and Communication in the animal and the Machine," John Wiley & Sons, Inc., New York, 1948) is the science of organization of mechanical and electrical components for stability and purposeful actions. A distinguishing feature of this new science is the total absence of considerations of energy, heat, and efficiency, which are so important in other natural sciences. In fact, the primary concern of cybernetics is on the qualitative aspects of the interrelations among the various components of a system and the synthetic behavior of the complete mechanism.”

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Qian Xuesen

Fonte: Engineering cybernetics, (1954), p. vii. About the origin of the word Cybernetics