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astronomy

Qian Weichang

Qian Weichang is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Qian Weichang rather than just read about it. In short: Qian Weichang or Chien Wei-zang (simplified Chinese: 钱伟长; traditional Chinese: 錢偉長; pinyin: Qián Wěicháng; Wade–Giles: Ch'ien Wei-ch'ang; 9 October 1912 – 30 July 2010) was a Chinese physicist and applied mathematician, as well as academician of the Chinese Academy of Sciences. He served as President of Shanghai University.

Qian Weichang — main illustration
Qian Weichang — illustration

Key takeaways

  • Qian Weichang belongs to astronomy; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Qian Weichang to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Qian Weichang from memory before moving on to harder problems.

Reference excerpt

Qian Weichang or Chien Wei-zang (simplified Chinese: 钱伟长; traditional Chinese: 錢偉長; pinyin: Qián Wěicháng; Wade–Giles: Ch'ien Wei-ch'ang; 9 October 1912 – 30 July 2010) was a Chinese physicist and applied mathematician, as well as academician of the Chinese Academy of Sciences. He served as President of Shanghai University.

Career Qian was born in Wuxi, Jiangsu, Republic of China, on 9 October 1912. His uncle was the historian Ch'ien Mu. After graduating from Tsinghua University with a Bachelor of Science in 1935, he entered its Graduate School and became an intern researcher at the National Central Research Institute under the guidance of Wu Youxun. He obtained a Doctor of Philosophy at the University of Toronto under the supervision of John Lighton Synge in 1942, and then worked as a research associate in the Jet Propulsion Laboratory of Caltech. In 1946, Qian returned to China and served as mechanics professor of Tsinghua University, Peking University and Yanjing University. In 1950s, he was dean of studies and vice president of Tsinghua University, vice director of the Institute of Mechanics of Chinese Academy of Sciences (CAS), director of the Institute of Automation of CAS, and a member of the standing committee of All China Federation of Scientific Societies. He was elected a founding academician of the CAS in 1955 and a foreign academician of the Polish Academy of Sciences in 1956. He was appointed vice-president of the Tsinghua University at the same year, but was seen as a "rightist" during the anti-rightist campaign because he criticised the removal of science majors in the 1950s. He was labelled an ultra-rightist in 1958, but this was redressed in 1983. During the Cultural Revolution (1966–1976), Qian worked at a Beijing steel company, invented the best hydraulic press in Beijing and was called "professor" by his workmates. In 1982, Qian became president of Shanghai University of Technology, which had been turned into shambles after the consolidation of four institutions of higher education in 1994. Qian was editor-in-chief of Applied Mathematics and Mechanics (English Edition), a member of the editorial boards of International Journal of Engineering Science (US), Advances in Applied Mechanics (US), Journal of Thin-walled Structure (Holland) and Journal of Finite Elements in Analysis and Design. He had been vice chairman of the National Committee of Chinese People's Political Consultative Conference since 1987. Qian was a specialist in applied mathematics, mechanics, physics, engineering science and Chinese information processing. He was generally acknowledged as one of the pioneers and founders of modern mechanics undertakings in China. His major research activities include; the intrinsic theory of plates and shells, the analysis of large deflection of thin plates and shells, the analysis of corrugated pipes, mechanics of armour penetration, singular perturbation methods, variational principles and generalized variational principles, finite element methods as well as the measurements of atmospheric electricity, spectral analysis of rare-earth elements, wave guide theory, lubrication theory, the development of high-energy batteries, his macro-coding of Chinese characters, etc. The joint work with J. L. Synge on the intrinsic theory of plates and shells is considered as a pioneering classical work in solid mechanics and his successive approximation method of treating large deflection problem is now named as "Chien's method". And he initiated a novel singular perturbation method, the method of composite expansions. He had published in academic monographs and hundreds of scientific papers. Due to his work on the problems of large deflation of circular elastic plates and the generalized variational principles, he won the State Natural Science Award (Second Class) twice, in 1965 and 1982. He also made great contribution to the engineering applications of sciences, such as the fluttering of airplanes, the design of submarines, armour penetration, the design of instruments and panpipe systems. In the early 1980s, Qian worked with Zhou Youguang and Liu Zunqi on creating a Chinese-language edition of Encyclopædia Britannica. During his presidency of Shanghai University (formerly Shanghai University of Technology), he devoted himself to the reconstruction of the university and to the accomplishment of reforms in higher education. He believed that the key role of higher education is to bring up excellent new generations with prefect personality and advanced expertise. For this purpose, he laid emphasis on raising the academic level of the university and showed great concerns to the publication of academic journals at the university. Qian also served as chairman of the Steering Committee of the Third International Conference on Linear Mechanics in Shanghai in 1998. He died in Shanghai at 6:20AM on 30 July 2010.

Awards and honors In 1965 and 1982, he won the State Natural Science Award (Second Class) twice. Asteroid 283279 Qianweichang, discovered by the PMO NEO Survey Program at Purple Mountain in 2007, was named in his memory. The official naming citation was published by the Minor Planet Center on 5 February 2020 (M.P.C. 121135).

References

External links

Cultural Revolution-era interview of Qian Weichang on YouTube (in English)

Illustrations

Qian Weichang illustration

Worked examples

Example 1 — a first encounter with Qian Weichang

Start with the simplest possible case. Write down what Qian Weichang claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Qian Weichang before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Qian Weichang ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Qian Weichang

In research
Qian Weichang appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Qian Weichang in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Qian Weichang is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1912 births, 2010 deaths, 20th-century Chinese science writers, so understanding it makes those chapters shorter.
In everyday life
Look for Qian Weichang outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Qian Weichang in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Qian Weichang means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Qian Weichang out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Qian Weichang in simple terms?

Qian Weichang or Chien Wei-zang (simplified Chinese: 钱伟长; traditional Chinese: 錢偉長; pinyin: Qián Wěicháng; Wade–Giles: Ch'ien Wei-ch'ang; 9 October 1912 – 30 July 2010) was a Chinese physicist and applied mathematician, as well as academician of the Chinese Academy of Sciences. He served as Preside…

Why does Qian Weichang matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Qian Weichang?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Qian Weichang.

Tags

  • 1912 births
  • 2010 deaths
  • 20th-century Chinese science writers
  • Academic journal editors
  • Academic staff of Shanghai University of Technology
  • Academic staff of Tsinghua University
  • Educators from Wuxi
  • Hong Kong Basic Law Drafting Committee members
  • Mathematicians from Jiangsu
  • Members of the Chinese Academy of Sciences
  • Physicists from Jiangsu
  • Presidents of Shanghai University

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