What does South Korea contribute to the world? What the South Korean team contributed to World War I

Inventing a modern means of transportation - the automobile There is a Korean named Park Chi Ben, who did not use any tools, and just thought about it out of thin air, he miraculously invented a new means of transportation - the automobile. When he saw that foreign culture and technology were so backward, he found one of his German friends, Mr. Mercedes, and through him, he generously dedicated his great invention to the German people. 10 Founded the Theory of Evolution Not much to say, the founder is called Cheng Dawen, and the puppet is Darwin of England.

South Korea has a very strong strength and influence in the fields of science and technology, culture, entertainment, and sports.

In terms of culture, Korea has a rich cultural heritage and traditional culture, such as Korean dramas, Hallyu, Korean cuisine, and many more.

In terms of entertainment, South Korea has many well-known singers, actors, hosts, etc., and their **, movies, TV dramas, etc. are widely popular around the world.

In terms of sports, South Korea also has a high level in the field of sports, such as football, basketball, swimming, and so on.

In short, South Korea has a very strong strength and influence in various fields, and has also made important contributions to the world.

The electrostatic precipitator of the second burning machine head was transformed in 2009. The original factory site is limited, only the location of the new dust collector on the east side of the original dust collector, and the other 1 needs to be newly built at the original dust removal location. Since the electrostatic precipitator of the sintering machine head is the best production equipment, in order to reduce the impact on the production time.

Construction plan: build a new dust collector in the open space on the east side, and connect the east flue to this dust collector for the first time after the dust collector is completed. Dismantle the original Dongtai dust collector and build another dust collector, after the dust collector is completed, the second contact will be connected to the west flue to the new dust collector, the second burner head electrostatic precipitator was completed at the end of 2009, and the design emission concentration of the dust collector is 50mg m3.

The electrostatic precipitator of the second and third burning heads can meet the new national standards under normal production conditions. However, the emissions of western burning and new burning cannot meet the requirements of the new national standards. Domestic and foreign sintering head flue gas purification all use electrostatic precipitator, the new national standard requires the emission to be less than 50mg m3, which is difficult to achieve at present, although the electrostatic precipitator increases to 4 electric fields, but the sintering head electrostatic precipitator is affected by the process temperature, humidity, specific resistance is fluctuating, and the emission of sintering head electrostatic precipitator is also fluctuating, especially the fluctuation of sintering production, sintering machine start-up and shutdown, etc.

At present, more than half of the sintering machines in the country have completed flue gas desulfurization, that is, the dust in the flue gas has been further processed by the desulfurization process after passing through the electrostatic precipitator, and the exhaust flue gas can fully meet the new national emission standards. According to the requirements of the national "Eleventh Five-Year Plan" emission reduction plan, the ironmaking plant began to adopt the Danish rotary spray semi-dry desulfurization process in 2009, and successively completed the flue gas desulfurization facilities of 6 sintering machines, and the dust emission of 6 sintering heads of the ironmaking plant after desulfurization bag dust emission of 30mg m3 fully meets the requirements of the new national standard. In order to meet the requirements of the new national standard of 30mg m3, the existing electrostatic precipitator can be increased and transformed

The first is to increase the circulation area, reduce the wind speed of the electric field, and prolong the residence time of the flue gas medium in the dust collector, which is equivalent to dismantling the existing dust collector and widening and heightening it on the original basis; The second is to increase the number of electric fields, the original dust removal is retained, and the original inlet or outlet bell mouth is removed and increased to an electric field, so as to increase the area of the dust collection plate of the electric field, prolong the time for the flue gas to stay in the electric field, so as to improve the dust removal efficiency; Another solution is the electric bag reform scheme: retain the original electrostatic precipitator foundation, shell, ash hopper, bell mouth and ash conveying system, only remove the plate line and rapping system of the original electric field, and remake the upper box to install the cloth bag, but due to the increased resistance of bag dust removal, the original motor needs to be increased. The above scheme is comprehensively considered from the stability, effect, investment, construction period, site, etc., and the electric bag modification scheme is the best.

Discharge cooling is another type of convection cooling. Unlike regenerative cooling, the coolant used for exhaust cooling absorbs heat to the thrust chamber and is discharged out of the combustion chamber instead of entering the combustion chamber to participate in combustion. Direct drain coolant reduces the thrust chamber specific impulse, so the coolant flow for drain cooling needs to be minimized while only using drain cooling at the outlet section of the nozzle that is relatively less heated.

There is also radiative cooling, in which the heat flow is transferred from the combustion products to the thrust chamber, and then the heat is radiated by the thrust chamber wall to the surrounding space. Radiative cooling is characterized by simplicity and small structural mass. It is mainly used in the extension section of large nozzles and the thrust chamber of small thrust engines using high-temperature resistant materials.

When cooling in the thrust chamber of the tissue, a relatively low temperature liquid or gas protective layer is established on the surface of the thrust chamber wall to reduce the heat flow to the thrust chamber wall, reduce the wall temperature, and achieve cooling. Internal cooling is mainly divided into three methods: internal cooling (shield cooling), membrane cooling and diaphoretic cooling of head tissues. After the internal cooling measures are adopted in the thrust chamber, the mixing ratio near the wall of the combustion chamber is different from the optimal mixing ratio in the central area (in most cases, the near-wall layer rich in fuel is used) due to the need to reduce the temperature of the protective layer, resulting in the uneven distribution of the mixing ratio along the cross-section of the combustion chamber, so that the combustion efficiency is reduced to a certain extent.

Membrane cooling is similar to shield cooling in that it cools the thrust chamber wall by establishing a uniform and stable coolant film or air film protective layer near the inner wall surface, except that the coolant used to establish the protective layer is not injected by the injector, but is supplied through a special cooling belt. The cooling band is generally arranged in a cross-section of the combustion chamber or the convergence section of the nozzle. There can be several cooling bands along the length of the combustion chamber.

In order to improve the stability of the membrane, the coolant often flows through the gaps or small holes in the cooling belts, and when sweating is used, the thrust chamber wall or part of the inner wall is made of porous material with a pore diameter of tens of microns. Porous materials are usually sintered with metal powders or pressed with metal mesh. In this case, the number of pores per unit area is increased by making the micropores in the material as evenly distributed as possible.

The liquid coolant penetrates into the inner wall, creating a protective film that reduces the density of the heat transferred to the wall. When the flow rate of liquid coolant used for sweat cooling is above a certain threshold, a liquid film is formed near the wall of the thrust chamber. When the coolant flow rate is below the critical flow, the inner wall temperature will be higher than the coolant boiling point at the current pressure, and some or all of the coolant will evaporate, forming an air film.

In addition to the above thermal protection, there are other thermal protection methods such as: ablation cooling, thermal insulation cooling, hot melt cooling and composite protection of chamber walls. 3. Thermal protection scheme of high enthalpy gas generator Based on the above methods and the actual situation, the thermal protection method of high enthalpy gas generator is obtained.

The combustion chamber of a high-enthalpy gas generator differs from that of a liquid rocket engine, eliminating the front thrust chamber part, making its structure simpler and more effective. Then, the thermal protection involved is the thermal protection part of the combustion chamber wall. As the fuel enters the combustion chamber, it quickly decomposes and releases large quantities.

South Korea has been a world leader in the information technology industry for many years, and in addition to being world-renowned for its high-speed Internet services, it is also a world market leader in memory, flat panel displays such as LCD and plasma displays, and mobile**.

South Korea has strong international competitiveness in the manufacturing industry of steel, shipbuilding, automobiles, semiconductors and digital products, and most of its products have their own brands, and their position in the international industrial chain is constantly improving.

The steel industry is one of the leading industries in Korea and has contributed greatly to the country's economic growth over the past half century. South Korea is currently the world's fifth-largest steel manufacturer and the world's first-largest per capita steel consumption.

South Korea's major steel producers are POSCO, Hyundai Steel, Dongguk Steel, etc., of which POSCO is the world's largest and the most competitive steel manufacturer in the world.

South Korea is the world's shipbuilding power, and for a long time it was also the world's largest shipbuilding country. South Korea occupies seven of the top 10 shipyards in the world.

South Korea is a world leader in electronics, with a leading position in the world market for flat panel displays such as memory, LCD and plasma displays, as well as mobile**. The world-renowned Korean electronics manufacturers include Samsung, LG, SK, etc., of which Samsung is the world's largest information technology company.

If there is still a contribution, it is that a large number of soldiers have been sent to the Japanese army. He made indelible contributions to Japan's war of aggression. Of course, in World War II, there were also Taiwanese in the Japanese army.

At that time, Korea, Taiwan, was occupied by Japan) After the defeat of Japan, Korea was divided into two parts, North Korea was administered by the Soviet Union, and South Korea was administered by the United States, which was basically like this.

There is no contribution, and of course it is not in our light, but in fact, it is in the light of the United States.

Japan and South Korea have not done anything big.

South Korea, because the whole world is Smecta Korea.

10 years in Japan and 10 years in Korea.

Excellent works have no borders, for example, the previous "Train to Busan" is still very popular in the United States, if it is a TV series, most of what I see on the Internet is still American dramas. But again, good works have no borders.

There are four major cultural heritages in the world, one is China's first-class, the second is Hollywood movies, and the third is Japanese anime.

Since China has given a certain reality to Korean entertainment, the promotion of Korean entertainment should be that I have reached the bottom. But I have to say that South Korea really spares no effort in creating entertainment. In addition, there is a lot of competition and pressure, so the Korean entertainment industry is still very, very competitive in the world.

According to the important criteria for Oscar awards, the highest level of shooting in Asia is currently the level of Korean films. There are many Korean films that can be shortlisted for the Oscars.

The level of film and television in South Korea is not very high, so such a level in South Korea may be hyped up, and the impact is still great.

Very good, indeed. The screenwriters in South Korea always have very big brains, and the directors are also very good at shooting.

Some of them are okay, **The experience is better than that of domestic ones. The world level is also an idea that I want to look at again in many years.

Cottage, pretty much the same thing.