Briefly describe the main functions of family community culture?

Answer: Blood cohesion.

Each family within the family recognizes the ancestors according to the paternal lineage and passes on the monoline. In order to seek sympathy and support, immigrants with foreign surnames often recognize relatives with the big surnames within the original society and seek social relations.

Protection of the network. Geo-cohesion. The emotional belonging of the family community is inseparable from a specific region, and the common land resources are the basis for them to share the happiness of life, and it is the same bloodline that raises all families

1. Recognition of family members.

2. The inheritance and development of family style.

3. Unity and cohesion of family members.

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.

In the pluralistic and integrated community culture of Chinese culture, the Han culture is undoubtedly in the dominant position and is the mainstream culture, while the other 55 minority cultures are in a subordinate position and are non-mainstream cultures. Han culture and national culture are the relationship between the mainstream and the non-mainstream, that is, the relationship between the main contradiction and the non-main contradiction, and this relationship is dialectical.

First, due to the characteristics of the historical development conditions and the structure and function of the culture itself, the cultures of different nationalities are relatively prosperous, developed, and popularized in this or that historical period. There are also those that are prosperous, developed, and popularized to a slightly worse degree. However, the culture of every nation will not lose its distinctive national characteristics because of this. Because each national culture is unique, they are all in an equal position as a value of the cherry blossom shed, which is equally important for this or that nation itself, and is indispensable for the formation and development of Chinese culture.

Second, in the history of China, the development level of the material productive forces of the Han society and the mode of production corresponding to the level of productivity of the Han society have always been in a leading position, which determines that the development of its culture is also in the lead, and it plays a leading role in the formation and development of the Chinese cultural community, influencing, uniting and condensing the cultures of all ethnic groups.

Third, in the process of historical development, the diverse cultures of various ethnic groups have exchanged, influenced, penetrated and promoted each other with the Han culture.

As a community, the family has an important function in the retirement culture. First, families can create a sense of security and belonging for the elderly. As older people age, they often lose social support and independence for a variety of reasons, including health, financial, and social integrity, and they may also feel lonely and helpless.

In this case, the family can create a social circle and caring network for the elderly, so that the elderly feel noticed and respected. Secondly, the family can inherit and carry forward the cultural tradition of pension. With the development of society, many traditional family pension methods have gradually disappeared or changed.

However, by inheriting the tradition and culture of family care, the elderly can feel the warmth and affection of the family, which is conducive to the psychological stability and life satisfaction of the elderly.

From another perspective, the family as a retirement community can also provide care and support for the elderly. In the traditional family culture, it is generally the elders who take on the responsibility of caring for and caring for the elderly. When an elderly person needs care and attention, family members can share these responsibilities and provide the necessary material support.

In addition, through the rational allocation of resources within the family and the planning of the common well-being of the family, it also helps to solve the financial and material problems faced by the elderly.

In short, the family as a community has an important function in the retirement culture. It can create a sense of security and belonging for the elderly, inherit and carry forward the traditional culture of elderly care, and provide care and support for the elderly. In the future pension culture, the status and role of the family will be more pivotal, and it is necessary to continuously strengthen the cognition and understanding of family pension to better realize the common well-being of the elderly and the family.