At the first working meeting of the 'Key Technical Standard PromotionProject', an important project of the national scientific and technical support plan during the'11th Five Year' held recently in Bei...At the first working meeting of the 'Key Technical Standard PromotionProject', an important project of the national scientific and technical support plan during the'11th Five Year' held recently in Beijing, the first group of 11 research topics for the 'KeyTechnical Standard Promotion Project' was formally introduced. According to Ms. Yu Xinli, who is incharge of the project as Deputy Director of the China National Institute of Standardization, theproject comprises four aspects: the international standards key breakthrough project, the technicalstandards promotion project of adapting technical trade measures, the technical standards innovationproject of basic public welfare, and the technical standard enhancement project of public security.展开更多
At the present stage, the contaminated site restoration project is one of the important projects in the social development process, and has received people's attention. In order to better realize the application v...At the present stage, the contaminated site restoration project is one of the important projects in the social development process, and has received people's attention. In order to better realize the application value of the project and continuously optimize the project, attention must be paid to the restoration project. This paper mainly analyzes from two aspects of secondary pollution and quality control, hoping to provide reference for the future development and progress of environmental supervision of restoration projects.展开更多
Under the influence of the rapid development of modern industry, the market demand for energy is increasing day by day, which makes the existing energy reserves decrease day by day. At present, the world's power e...Under the influence of the rapid development of modern industry, the market demand for energy is increasing day by day, which makes the existing energy reserves decrease day by day. At present, the world's power energy is mostly dependent on thermal power generation. However, the polluted dust and gas released from it will directly affect human health and the natural environment, which is contrary to the concept of sustainable development. Under this background, wind energy has attracted the attention of the energy market due to its renewable and pollution-free advantages. Especially under the background of increasingly mature wind power generation technology, the application rate of wind turbines has been gradually increased, effectively easing the pressure on electricity consumption in the market. In this regard, this paper will analyze the principle of wind power generation and the key points of wind power generation technology, aiming at promoting the promotion of economic and social benefits of wind power generation by improving the control degree of wind power application.展开更多
This paper first briefly introduces the installation of building electrical engineering, then briefly analyzes the preparatory work for the construction of building electrical installation, and finally discusses the k...This paper first briefly introduces the installation of building electrical engineering, then briefly analyzes the preparatory work for the construction of building electrical installation, and finally discusses the key points of building electrical engineering installation technology and its application, hoping to provide some reference for relevant people.展开更多
Apple is an important cash crop. Because of its rich nutrition, sweet taste and rich iron, it is an important fruit to improve human immunity. Because the demand for apples in the market is relatively large, high yiel...Apple is an important cash crop. Because of its rich nutrition, sweet taste and rich iron, it is an important fruit to improve human immunity. Because the demand for apples in the market is relatively large, high yield and quality should be considered by growers. When fruit trees are cultivated, the technique of dwarfing and close planting can advance the fruit bearing time of fruit trees and help people to obtain economic benefits. At the same time, it can also make efficient use of the orchard. Therefore, in the cultivation stage, people can use this technology to dwarf the apple trees, effectively control the crown area, increase the single volume and increase the economic benefits. Based on the in-depth analysis of the technical points such as dwarfing dense planting and management, and according to the market demand, the present situation of dwarfing cultivation of fruit trees is analyzed, and the technical points such as scientific land selection, dwarfing rootstocks, density control, crown pruning, water and fertilizer management, orchard clearing and pest prevention are put forward, so as to explore the efficient management technology of apple tree dwarfing culture.展开更多
Simply-supported tied arch is a zero-thrust arch bridge with clear structural force,large stiffness,low height,beautiful appearance and economic efficiency.In Xuzhou-Shanghai section of Beijing-Shanghai HSR,the simply...Simply-supported tied arch is a zero-thrust arch bridge with clear structural force,large stiffness,low height,beautiful appearance and economic efficiency.In Xuzhou-Shanghai section of Beijing-Shanghai HSR,the simply-supported tied arch is systematically studied and widely applied for the first time.A total of 21 simplysupported tied arch bridges with the spans of 96 m,112 m and 128 m respectively are constructed for the route.The simply-supported tied arch is an external static and internal super-static parallel arch or basket arch of Nielsen system in structure;single-box,threechamber and equal-height prestressed concrete box girder is adopted for the tie beam;dumbbell steel pipe concrete section is adopted for the arch rib;PES(FD)low-stress anticorrosion cable body is adopted for the suspender.The rational structural form is determined by comparative study on the key technical parameters such as the layout form of suspender,rise-span ratio and arch axis alignment.This paper summarizes the optimization of simplysupported tied arch structure and looks forward to the development of bridge structure.展开更多
In recent years, with the further implementation of the state's grain subsidy policy for wheat planting, the farmers' enthusiasm for planting wheat has been further strengthened. How to improve the yield and q...In recent years, with the further implementation of the state's grain subsidy policy for wheat planting, the farmers' enthusiasm for planting wheat has been further strengthened. How to improve the yield and quality of wheat per unit area has become a key issue for many growers. Green wheat planting is an innovation to traditional wheat planting. It is beneficial to improve the yield and quality of wheat per unit area, ensure the green ecological safety of the produced wheat, and better meet the demand of consumers for high-quality food products. In the following, the paper studies the planting technology of green high-quality wheat with high yield.展开更多
文摘At the first working meeting of the 'Key Technical Standard PromotionProject', an important project of the national scientific and technical support plan during the'11th Five Year' held recently in Beijing, the first group of 11 research topics for the 'KeyTechnical Standard Promotion Project' was formally introduced. According to Ms. Yu Xinli, who is incharge of the project as Deputy Director of the China National Institute of Standardization, theproject comprises four aspects: the international standards key breakthrough project, the technicalstandards promotion project of adapting technical trade measures, the technical standards innovationproject of basic public welfare, and the technical standard enhancement project of public security.
文摘At the present stage, the contaminated site restoration project is one of the important projects in the social development process, and has received people's attention. In order to better realize the application value of the project and continuously optimize the project, attention must be paid to the restoration project. This paper mainly analyzes from two aspects of secondary pollution and quality control, hoping to provide reference for the future development and progress of environmental supervision of restoration projects.
文摘Under the influence of the rapid development of modern industry, the market demand for energy is increasing day by day, which makes the existing energy reserves decrease day by day. At present, the world's power energy is mostly dependent on thermal power generation. However, the polluted dust and gas released from it will directly affect human health and the natural environment, which is contrary to the concept of sustainable development. Under this background, wind energy has attracted the attention of the energy market due to its renewable and pollution-free advantages. Especially under the background of increasingly mature wind power generation technology, the application rate of wind turbines has been gradually increased, effectively easing the pressure on electricity consumption in the market. In this regard, this paper will analyze the principle of wind power generation and the key points of wind power generation technology, aiming at promoting the promotion of economic and social benefits of wind power generation by improving the control degree of wind power application.
文摘This paper first briefly introduces the installation of building electrical engineering, then briefly analyzes the preparatory work for the construction of building electrical installation, and finally discusses the key points of building electrical engineering installation technology and its application, hoping to provide some reference for relevant people.
文摘Apple is an important cash crop. Because of its rich nutrition, sweet taste and rich iron, it is an important fruit to improve human immunity. Because the demand for apples in the market is relatively large, high yield and quality should be considered by growers. When fruit trees are cultivated, the technique of dwarfing and close planting can advance the fruit bearing time of fruit trees and help people to obtain economic benefits. At the same time, it can also make efficient use of the orchard. Therefore, in the cultivation stage, people can use this technology to dwarf the apple trees, effectively control the crown area, increase the single volume and increase the economic benefits. Based on the in-depth analysis of the technical points such as dwarfing dense planting and management, and according to the market demand, the present situation of dwarfing cultivation of fruit trees is analyzed, and the technical points such as scientific land selection, dwarfing rootstocks, density control, crown pruning, water and fertilizer management, orchard clearing and pest prevention are put forward, so as to explore the efficient management technology of apple tree dwarfing culture.
文摘Simply-supported tied arch is a zero-thrust arch bridge with clear structural force,large stiffness,low height,beautiful appearance and economic efficiency.In Xuzhou-Shanghai section of Beijing-Shanghai HSR,the simply-supported tied arch is systematically studied and widely applied for the first time.A total of 21 simplysupported tied arch bridges with the spans of 96 m,112 m and 128 m respectively are constructed for the route.The simply-supported tied arch is an external static and internal super-static parallel arch or basket arch of Nielsen system in structure;single-box,threechamber and equal-height prestressed concrete box girder is adopted for the tie beam;dumbbell steel pipe concrete section is adopted for the arch rib;PES(FD)low-stress anticorrosion cable body is adopted for the suspender.The rational structural form is determined by comparative study on the key technical parameters such as the layout form of suspender,rise-span ratio and arch axis alignment.This paper summarizes the optimization of simplysupported tied arch structure and looks forward to the development of bridge structure.
文摘In recent years, with the further implementation of the state's grain subsidy policy for wheat planting, the farmers' enthusiasm for planting wheat has been further strengthened. How to improve the yield and quality of wheat per unit area has become a key issue for many growers. Green wheat planting is an innovation to traditional wheat planting. It is beneficial to improve the yield and quality of wheat per unit area, ensure the green ecological safety of the produced wheat, and better meet the demand of consumers for high-quality food products. In the following, the paper studies the planting technology of green high-quality wheat with high yield.
