astronomy

Li Yinyuan

Li Yinyuan 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 Li Yinyuan rather than just read about it. In short: Li Yinyuan (Chinese: 李荫远; pinyin: Lǐ Yìnyuǎn; 22 June 1919 – 22 August 2016) was a Chinese electrical engineer and physicist. He was an academician of the Chinese Academy of Sciences (CAS).

Key takeaways

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

Reference excerpt

Li Yinyuan (Chinese: 李荫远; pinyin: Lǐ Yìnyuǎn; 22 June 1919 – 22 August 2016) was a Chinese electrical engineer and physicist. He was an academician of the Chinese Academy of Sciences (CAS).

Biography Li was recommended to Sichuan University in 1938 and transferred to National Southwestern Associated University in 1941. He became a teaching assistant in National Southwestern Associated University after his graduation. He moved to Washington State University by government study abroad scholarship in 1947 and earned his master's degree in 1948. Li then obtained a doctor's degree from Illinois State Normal University in 1951. He was forbidden to leave the United States due to the Korean War. He made research at Carnegie Institute of Technology between 1952 and 1955, and worked for Westinghouse Electric Corporation in 1955. Li returned to China in 1956 after his travel ban was lifted. He was assigned to Institute of Applied Physics, Chinese Academy of Sciences. Li's main research field was solid-state physics and magnetism, especially in the theoretical interpretation of statistical theory of order–disorder phase transition for alloys and anti-ferromagnets, the magnetic structure and superconchange theory of transition element, Raman scattering effect of double frequency radiation in the nonlinear optics with mismatched phase angle and quasi–one–dimensional conductivity of non-linear optic crystal lithium iodate–α. Li was elected an academician of the Chinese Academy of Sciences in 1980. Li died on 22 August 2016 at the age of 97 in Beijing.

References

Worked examples

Example 1 — a first encounter with Li Yinyuan

Start with the simplest possible case. Write down what Li Yinyuan 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 Li Yinyuan 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 Li Yinyuan 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 Li Yinyuan

In research: Li Yinyuan 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 Li Yinyuan 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: Li Yinyuan is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1919 births, 2016 deaths, 20th-century Chinese engineers, so understanding it makes those chapters shorter.
In everyday life: Look for Li Yinyuan 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 Li Yinyuan in 20 minutes

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

Frequently asked questions

What is Li Yinyuan in simple terms?

Why does Li Yinyuan 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 Li Yinyuan?

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 Li Yinyuan.