engineering

Lin Xiangdi

Lin Xiangdi is a engineering 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 Lin Xiangdi rather than just read about it. In short: Lin Xiangdi (Chinese: 林祥棣; 8 February 1934 – 29 July 2018) was a Chinese optoelectronic engineer. He was an academician of the Chinese Academy of Engineering and served as president of the Southwest University of Science and Technology in Sichuan.

Key takeaways

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

Reference excerpt

Lin Xiangdi (Chinese: 林祥棣; 8 February 1934 – 29 July 2018) was a Chinese optoelectronic engineer. He was an academician of the Chinese Academy of Engineering and served as president of the Southwest University of Science and Technology in Sichuan.

Biography Lin was born 8 February 1934 in Nantong, Jiangsu, China. After graduating from Zhejiang University in 1956, he worked for the Changchun Institute of Optics, Fine Mechanics and Physics of the Chinese Academy of Sciences (CAS). In 1972, Lin moved to Sichuan Province to help establish the Institute of Optics and Electronics of the CAS, and became vice president of the institute. He was elected an academician of the Chinese Academy of Engineering in 1997, and served as president of the Chengdu branch of the CAS. He served as president of the Southwest University of Science and Technology in Mianyang from December 2000 to October 2004, and continued to be president emeritus until his death. Lin died on 29 July 2018 in Chengdu, aged 84.

References

Worked examples

Example 1 — a first encounter with Lin Xiangdi

Start with the simplest possible case. Write down what Lin Xiangdi claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, 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 Lin Xiangdi 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 Lin Xiangdi 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 Lin Xiangdi

In research: Lin Xiangdi appears in engineering 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 Lin Xiangdi 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: Lin Xiangdi is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1934 births, 2018 deaths, Engineers from Jiangsu, so understanding it makes those chapters shorter.
In everyday life: Look for Lin Xiangdi 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 Lin Xiangdi in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Lin Xiangdi 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 Lin Xiangdi out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Lin Xiangdi in simple terms?

Why does Lin Xiangdi matter?

Because it connects several engineering 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 Lin Xiangdi?

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 Lin Xiangdi.