What are some jargons that sound great?

The Gini coefficient is a metric proposed by Hirschman based on the Lorenz curve to judge the degree of distributive equality. Let the area between the real income distribution curve and the absolute equality curve of income distribution be a, and the area at the bottom right of the real income distribution curve is b. and divide a by the quotient of (a+b) to indicate the degree of inequality.

This value is known as the Gini coefficient or Lorenz coefficient. If a is zero, the Gini coefficient is zero, indicating that the income distribution is completely equal; If b is zero, the coefficient is 1, and the income distribution is absolutely unequal. The more equal the income distribution, the smaller the arc of the Lorenz curve, the smaller the Gini coefficient, and conversely, the more unequal the income distribution, the greater the arc of the Lorenz curve, the larger the Gini coefficient.

Alternatively, see the Pareto index (a measure of the degree to which income is unevenly distributed). Many scholars in China have explored the specific calculation methods of the Gini coefficient and put forward more than 10 different calculation formulas. Mr. Zhang Jianhua, College of Economics and Trade, Shanxi Agricultural University, proposed a simple and easy-to-use formula:

Assuming that a certain number of people are ranked in order of income from low to high, and divided into n groups with equal numbers, and the proportion of the cumulative income of the population from group 1 to group i is wi of the total income of the whole population, then it is explained that the formula is obtained by using the definition of definite integrals to divide the integral (area b) of the Lorenz curve into the sum of the areas of n contour trapezoids. <>

The market for lemons is also known as the defective market, also known as the Akerlof model. It refers to a market with information asymmetry, that is, in the market, the seller of the product has more information about the quality of the product than the buyer. In extreme cases, the market will stop shrinking and non-existent, which is contrarian selection in information economics.

Lemon"In American slang, it means "defective" or "something that doesn't work." The lemon market effect refers to the fact that in the case of information asymmetry, good goods are often eliminated, and inferior products will gradually occupy the market, thereby replacing good goods, resulting in inferior products in the market. The existence of the lemon market is due to the fact that one party does not know the true value of the commodity, and can only judge the average quality by the average ** in the market, and because it is difficult to distinguish between good and bad goods, it is only willing to pay the average **.

Since there are good and bad goods, for the average **, providing good goods will naturally suffer, and those who provide bad goods will benefit. As a result, good goods will gradually be withdrawn from the market. As the average quality decreases, the average will also fall, and the real value of the goods above the average will gradually withdraw from the market, and finally only the bad goods remain.

In this case, consumers will think that the goods on the market are all bad, even in the face of a good product, they will be skeptical, in order to avoid being deceived, and finally choose bad goods. This is how the lemon market behaves. <>

The term has

1. Freezing three feet, not a day's cold: It is a metaphor for the formation of a situation, which is accumulated and brewed over a long period of time.

2. Before the soldiers and horses move, the grain and grass go first: before pointing out the soldiers, prepare the grain and forage. The metaphor is to prepare for something in advance.

3. The difference is a thousand miles: although the difference is very small at the beginning, the result will be a big mistake.

4. Not in his position, not in his politics: if he does not hold this position, he will not ask about the things within the scope of this position.

5. I don't know if there is a Han Dynasty, how can I talk about the Wei and Jin dynasties: I don't know if there is a Han Dynasty, let alone the Three Kingdoms Wei and Jin Dynasty. It is described as being detached from reality for a long time, and ignorant of social conditions, especially new things. It also describes the lack of knowledge and shallowness of learning.

6. The tiger is rejected at the front door, and the wolf enters the back door: the metaphor drives away an enemy and another enemy comes.

Philosophically, Occam's razor. Don't add entities if it's not necessary, i.e., if both theories solve a practical problem, the one with fewer assumptions is more correct.

The jargon that sounds very powerful to me is program**, programming, break-even point, pop, elasticity of demand, and so on.

What is survivorship bias, that is, the reporter asks how hard is it to succeed? Jack Ma says success is simple. But you don't see the thousands of people who have failed to start their businesses.

For example, the clamping theorem from materials science is actually a very common mathematical theorem, and anyone who has studied advanced mathematics knows it.

Survivorship bias. This is at the root of many people's delusion that success is something very simple and easy.

When you have done a lot of work for one thing and finally face whether to give up, you often choose to continue to do it, which is the cost of silence.

Medical terminology: tenesmus! It's a symptom of diarrhea and dysentery!

For example, passive waiting, one-day living, survivorship bias, peak-end law, opportunity cost, diminishing marginal cost, placebo effect, etc.

Coulomb explosion (Coulomb explosion) Zhihu Chemical Zone, many middle two have done it, throwing the NA block (advanced secondary two may also use K) into the water, observing it violently react with the water to release hydrogen, melt into a small ball and fly on the water surface, and finally end its short and young life in ** Originally, it was generally believed that this ** was induced by the accumulation of hydrogen released by violent reactions, but it generally required a rapid reaction in a confined space to produce a large amount of gas or heat to cause** The hydrogen produced by the reaction of the alkali metal with the water will lift the metal block from the surface of the water, avoiding further reactions. However, the phenomenon of ** can still be observed in experiments done in an argon atmosphere, which indicates that this process may not be as simple as we think. In 2015, several scientists from the Czech Academy of Sciences published an article in Nature Chemistry to illustrate this process with the help of a high-speed camera from the perspective of Coulomb**.

The results of high-speed camera and molecular dynamics simulation show that at the moment when the alkali metal comes into contact with water (within a few picoseconds), the metal atoms on its surface instantly lose a large number of electrons, and the electrons enter the water to form solvent synthetic electrons, while the metal droplets carry a large number of positive charges, and the molecular dynamics simulation estimates that the repulsion between the charges is enough to exceed the Rayleigh instability limit (Rayleigh instability), resulting in the ** of the metal droplets.

Displays the system vertical and horizontal position indicator - mouse.

Infrared scattered light spots irradiate particles, light sources with light-emitting semiconductors and photoelectric sensors, pulse signal sensors. - Optical mouse.

Handheld mobile communication terminals. - Mobile phones.

Over the media converter – the light bulb.

Multi-functional virtual reality simulator - game console.

In the complex channel UHF wireless multi-** receiving instrument - TV set human useless side tissue excision surgery - haircut.

Parallel acral thermostat device. - Socks.

Single-cylinder manual circulating air compressor - pump.

Human epidermal dead cell separator! - Rubbing a bath towel.

Make a note of that.

Keep these things in mind, and that's the point!!

Our law and law teacher is a windy man, although he has no hair and likes to drink wind oil. And when he saw a student who was intoxicated with a sweet dream, he would always take out a bottle of wind oil essence from his arms and ask if you wanted to take a sip. He won't force you to drink it, maybe this simple, kind man just thinks you need wind oil essence, and he just has it.

Because after coming up with an answer you don't need, he will always, in front of you. Take a small sip gently, and the expression is quite intoxicating.

So every time he drank the wind oil essence, he talked about the key points, and said, "Remember", we always recorded the teacher's gifts with piety, and the elders gave them, and we didn't dare to forget. Real people and real things, lie to you that you are a puppy.

Claim that you feel that others can't stand you, tidy up your wounds and find someone else to lose money.

Every time, when the law and law teacher finishes telling a case, he always can't help but say how important the claim is in this case, and he can mention the importance of eleven claims in ten cases, so I can't help but think that the word "claim" is very awesome. After all, how dare you forget the love in the depths.

A counterclaim is when someone asks you for compensation, and you slap yourself in the face with your backhand, asking him to pay you money.

When the word was spoken, the teacher was even more excited!! After he finished speaking, he took a small sip of wind oil essence, but this word, he would drink it as he spoke, or take a big sip, and kept telling us, "Students, here must be, remember it"!!

Unified modulus system.

This word is awesome, and it is more serious, which means that the two houses A and B are made as the same as possible, and it is best to reach the first floor of Building A and put it in Building B. I'm going to say this more simply, so let's give you a feel for the original text. The so-called unified modular system is a set of basic rules formulated in order to realize the standardization of design, so that the dimensions of different buildings and various divisions are unified and coordinated, so that they are universal and interchangeable, so as to speed up the design and improve the construction efficiency.

Reduce the cost of construction. )

Defect Liability Period.

It means that during a certain period of time, there are breakdowns, defects, and problems in the building, and you need to take the blame.

Lien means that you don't complete the agreement on time, and what you pledge goes to someone else. Actually, I've been wondering if it would be easier to stay.

The meaning of the word "birth" is that the thief is uncomfortable... But there is nothing that the teacher can't understand after a mouthful of wind and oil, which means that the house is like a person, who it was, after several hands of a file sorting.

The professional terminology of our civil engineering is still relatively close to the people, and it is not difficult to understand. Moreover, the teacher spoke well, vividly and vividly, and these terms and nouns are even more difficult to forget.

I can't forget the happy time of studying, and the bald head of which love river wind and oil essence.

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