engineering

Li Fung Chang

Li Fung Chang 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 Li Fung Chang rather than just read about it. In short: Li Fung Chang (Chinese: 張麗鳳) is a Taiwanese communications engineer, since 2015 the chief architect of Taiwan's 5G cellular communications network program office in the ministry of economic affairs, and a chair professor of electrical and computer engineering at National Chiao Tung University. Education and career Chang completed a PhD in 1985 at the University of Illinois Urbana-Champaign, with the dissertation An…

Key takeaways

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

Reference excerpt

Li Fung Chang (Chinese: 張麗鳳) is a Taiwanese communications engineer, since 2015 the chief architect of Taiwan's 5G cellular communications network program office in the ministry of economic affairs, and a chair professor of electrical and computer engineering at National Chiao Tung University.

Education and career Chang completed a PhD in 1985 at the University of Illinois Urbana-Champaign, with the dissertation An Information-Theoretic Study of Ratio-Threshold Antijam Techniques supervised by coding theorist Robert McEliece. Prior to her current position in Taiwan, she has worked for Telcordia, AT&T Labs, and Broadcom.

Recognition Chang was named a Fellow of the IEEE in 2001, "for contributions to the design and analysis of radio links and networks for wireless voice/data services".

References

External links Home page at NCTU

Worked examples

Example 1 — a first encounter with Li Fung Chang

Start with the simplest possible case. Write down what Li Fung Chang 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 Li Fung Chang 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 Fung Chang 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 Fung Chang

In research: Li Fung Chang 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 Li Fung Chang 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 Fung Chang is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fellows of the IEEE, Grainger College of Engineering alumni, Living people, so understanding it makes those chapters shorter.
In everyday life: Look for Li Fung Chang 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 Fung Chang in 20 minutes

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

Frequently asked questions

What is Li Fung Chang in simple terms?

Why does Li Fung Chang 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 Li Fung Chang?

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 Fung Chang.