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Many monitoring systems at home and abroad have established corresponding databases. For example, the Global Resource Information Database (GRID) established by the Global Environment Monitoring System (GEMS) collects global environmental information and widely provides users with a monitoring network. GEMS also tried to build GRID into the United Nations on the end of the environmental data management system. During the “one-in-five-five†period, China established the “National Environmental Information Database Research†research project, conducted research and development of the database, and built a “National Circular Pit Information System†that initially had the function of environmental management services. Many departments and provinces and cities have also established or are in the process of establishing environmental information databases of different sizes. The agricultural environmental monitoring station can effectively monitor the agrochemical environment and obtain relevant data.
China's agricultural environmental monitoring network has formed a total of wood. Over the past 20 years, many national or regional areas have been developed: agricultural environmental monitoring, such as the investigation of the Agricultural Circle Office of the Sewage Irrigation District, research on the value of agricultural environmental backgrounds, and the status of agricultural environmental inversions. And the survey of development trends, the nationwide survey of animal husbandry and product quality stars, and so on, have received a great deal of valuable attention. In the database, it has also done some work in conjunction with monitoring. Ear vomiting is still far from being able to meet the needs of the work and it needs to be further strengthened in the future. The development of agricultural environmental monitoring databases is a complex process, but it can be divided into four phases. The first stage is user requirements analysis. Its purpose is to clarify the goal of development, that is, to understand all possible users of the database and what kind of problems the user will solve with the database. At this stage, we must combine the scientific and practical aspects, conduct research and analysis of technical feasibility and economic feasibility, and formulate practical goals. The second stage is to turn agricultural environmental monitoring into a computer-storage model. The model must not only reflect the interrelationships between the original agricultural environmental entities, but also facilitate computer storage and use.
The development of agricultural environmental monitoring databases for agricultural environmental monitoring stations requires the mastery of many computer knowledge, but in a sense, the development of software is closer to an art, using the same language, to the same problem, different people. The effect of the compiled program will be very different. Therefore, in the development, only continuous research and continuous practice can improve the ability and level of software development.
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In the construction project, the large water mouth mold plays a crucial role. As a kind of support structure, the large water mouth mold has significant significance in ensuring the safety and stability of the project and improving the construction efficiency. This paper will introduce the related problems of large water mouth mold frame in detail to help readers better understand its application in construction engineering.
Large water mouth mold erection originated in the early 20th century, with the rapid development of the construction industry, its application gradually popularized. The large water frame is mainly used in the construction of large structures such as Bridges, high-rise buildings, factories, etc., to provide reliable support for reinforced concrete structures. The mold frame is composed of steel members and support system, which has high bearing capacity and stability.
In the construction project, the application scenarios of large water mouth mold are wide. For example, in bridge construction, the large water mouth mold can provide reliable support for the pier, beam plate and other parts of the bridge; In the construction of high-rise buildings, the large water frame can be used for cast-in-place floor slab and prefabrication of wall and column. In the construction of the plant, the large water mouth mold can be used to support the large-span beam, column and other parts.
The advantages of large water mouth die frame mainly include: improve construction efficiency, reduce labor intensity, save materials, shorten the construction period and so on. At the same time, there are also some shortcomings, such as high one-time investment costs, the need for professional design and installation teams. In view of these problems, the construction unit should fully consider the needs of the project and its own conditions, weigh the advantages and disadvantages, and choose the appropriate large water mouth mold scheme.
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