Freshman Meditation Briefly What is the Concept of Happiness?

Marxism.

The concept of happiness is a scientific dialectical concept of happiness, which is the organic unity of many aspects. Marx said: "There is no human form of food for a hungry man, and the poor who are worried have no sense of even the most beautiful scenery."

On the basis of affirming man's material happiness, Marxism pays special attention to man's spiritual happiness and the unity of material happiness and spiritual happiness. Happiness is not only the enjoyment of life, but also the creation of life through labor, and the unity of enjoyment and labor; Social happiness determines personal happiness, and personal happiness enriches social happiness, which is the unity of personal happiness and social happiness. The Marxist concept of happiness points out that the greatest happiness in life lies in dedication and in seeking benefits for mankind. Marx said:

If we choose the profession in which we can best work for the welfare of mankind, then the burden cannot weigh us down, for it is a dedication to the common good; Then what we feel is not a pitiful, limited, selfish pleasure, our happiness will belong to millions, our cause will live on silently, but eternally, and noble people will shed tears in the face of our ashes.

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.

The following are examples of the correct view of happiness:

The correct concept of happiness should fully embody the unity of material happiness and spiritual happiness.

1. The unity of personal happiness and social happiness.

1. The unity of current happiness and long-term happiness.

1. Characteristics of the unity of creating happiness and enjoying happiness. Establishing a correct outlook on happiness is of great practical significance.

The Communist Party of China is a proletarian political party guided by Marxism, a party that builds the party to serve the public and governs for the people. To realize the Chinese dream of the great rejuvenation of the Chinese nation is to realize the prosperity and strength of the country, the rejuvenation of the nation, and the happiness of the people. The original aspiration and mission of the Chinese Communists is to seek happiness for the Chinese people and rejuvenation for the Chinese nation.

Happiness comes from struggle. To realize the Chinese dream of the great rejuvenation of the Chinese nation, every Chinese son and daughter should have the obligation to take responsibility, constantly give full play to their wisdom and talents, continue to contribute to the country and society, realize their own life value in work and creation, experience happiness and enjoy happiness in the face of fruitful and brilliant achievements, and maximize the overall improvement of personal happiness and social happiness. ”

Macroscopically, the country is stable, the society is tranquil. Something to rely on. These three aspects are happiness.

In order for a person to establish a correct sense of happiness, it is important to establish a correct outlook on life and values.

First, to establish a correct concept of happiness, we must first recognize ourselves, analyze ourselves, and see what strengths and weaknesses we have, and only in this way can we correctly evaluate ourselves.

Second, establish a correct concept of happiness, don't compare with other people who are stronger, whether it is material or career, since others are better than themselves, then he will naturally have his own reason, I just need to do my own thing.

Third, to establish a correct sense of happiness, we must study hard, work hard, and work hard. It is important to remember that personal happiness is not pie in the sky, and then you will smash yourself. Happiness is earned with one's own hands.

How to build independent happiness? The key to happiness is to have a sense of contentment.

To establish a correct concept of happiness is to do more meaningful things for the society and the people in real life, and to exert more positive energy in the big family of society.