摘要的英文翻译

Because of the rapid growth of the population, human development and utilization of land resources is expanding constantly, improve the level of economic development, but because though behind production methods, not reasonable development patterns and make their own living environment fragile, natural disasters occurred frequently. Wetland soil is an environmental problem is very prominent place, mainly displays in: area of wetland is shrinking; The sand the natural environment of the wetland soil caused serious influence; Animals and plants a recession, biodiversity is threatened. Due to the special geographical position, it will directly destroy the deterioration of the local people's quality of life, but also restricted economic development. This paper mainly studies the sun island of wetland soil physical properties, chemical properties of the basic situation, for the local actual production and scientific research, and provide scientific data for wetland ecological environment and safety and the ecological restoration project to provide the basis. This paper chemical element analysis method of the soil physical and chemical properties of the basin, the selection of quantitatively determined the index mainly includes the chemistry of the wetland soil total nitrogen, total phosphorus, the determination of organic matter, total nitrogen, total phosphorus in the determination of organic matter, have a lot of methods, paper total nitrogen determination method we adopt diffusion method; The determination of total phosphorus set by NaOH melting a molybdenum antimony resistance to colorimetric method; The determination of organic matter in the us in the heat source conditions, and with a certain amount of standard heavy chromium acid potassium acid solution to oxidation soil organic matter (carbon), by the consumption of heavy chromium acid potassium quantity computation organic carbon content, and indirectly calculated the content of organic matter. Total nitrogen, total phosphorus and the measured results of organic matter in the second soil were the result of the census within the scope of total nitrogen content, including with secondary standard. Wetland soil physical properties such as moisture content, bulk density, saturated water holding capacity, capillary water holding capacity, porosity according to the dating results are in the northeast of land within range.

With the rapid development of urbanization in our country, building energy consumption is increasing year by year.In today's energy and environment problem is increasingly serious, the development and utilization of new energy has become one of the hottest topics in today's society.Solar energy is highly appreciated as a representative of the most important new energy, the heating technology from the previous monomer building small systems become large and medium-sized regional central heating system.Because of its advantages of energy-saving, environmental protection gradually become important design method of building energy efficiency design.In view of this, the design is mainly for lanzhou city a building to design the solar heating system, heating system plan in the design, then respectively to complete the structure of the heat load calculation, terminal device design calculation of hydraulic calculation, heating system, solar collector and auxiliary heat source, heat storage water tank, circulating pump, constant pressure equipment, water treatment equipment type selection design calculation, analysis of energy consumption in the end.As can be seen from the results of solar heating technology has obvious economic practicability, at the same time, hope that through this design can offer reference for the similar engineering reference, for the promotion of solar energy heating technology play a role.