The integrated watershed water quality model is an important tool for studying the water environment of the basin. This study explores several comprehensive watershed water quality models, analyzes the development history, structural principle, characteristics and application of the model. This paper preliminary applied SWAT model in the Baihe River Basin, Beijing, China to analyze the water quality changes. Finally, this study briefly analyzes the development trend of the basin comprehensive water quality model.

Ionic liquids are widely used in the field of electrochemistry because of its low melting point, wide electrochemical window and outstanding electrical conductivity. Ionic liquids are used as fuel-cell electrolytes in order to optimize the overall performance of fuel cells. Four ionic liquids have been investigated, such as 1-methylimidazolium hydrogensulfate [Hmim]HSO 4 , 1-n-butyl-3-methylimidazolium bromide [Bmim]Br, 1-n-butyl-3-methylimidazolium trifluoroacetate [Bmim]CF 3 COO, 1-n-butyl-3-methylimidazolium hydrogensulfate [Bmim] HSO 4 . At the same time, fuel cell shells made of PTFE and stainless steel were designed and processed. The anode and cathode electrode materials were prepared; then the above ionic liquids were used as the fuel-cell electrolyte in turn, The performance of the fuel cell was measured by voltammetry using hydrogen as a fuel and air as an oxygen source.

With the development of economy and the increase of population, water resources are becoming more and more scarce. The total amount of water resources in the Taizi River Basin of Liaoning Province, China is 5.120 billion m 3 , and the per capita water resources amount is 845 m 3 . According to the United Nations standards, it is classified as a water shortage area.In order to better manage and protect water resources, this paper uses Hydrological Simulation Program-Fortran (HSPF) model to simulate runoff in the Taizi River Basin. The Parameter Estimation (PEST) procedure was used to calibrate the hydrological parameters. The results showed that the Nash-Sutcliffe efficiency (NSE) of the calibration period (2009-2011) was 0.78, the correlation coefficient (R 2 ) was 0.89; the Nash-Sutcliffe efficiency of the validation period (2012-2013) was 0.68, and the correlation coefficient was 0.85. It indicates that the HSPF hydrological model has good applicability in the Taizi River basin which will provide useful reference for future modeling research.

The integration and continuous development of vehicle network technology and charging network will provide new ideas for power dispatching and trading, and will also promote the participation of green energy in market transactions. First, this paper combed the development of the charging network and the vehicle network platform, and analyzed the situation of the participation of green energy in the current electricity market. On this basis, combined with the technical characteristics of the charging network and the vehicle network platform, the opportunities and challenges that green energy would face when participating in the market were analyzed. After that, in order to give full play to the technical advantages of the charging network and the network platform of the car, this article put forward two kinds of transaction mechanisms, the direct green energy transaction and the green certificate trading, further evade the market risk, and provide reference for the development of electric vehicles and the development of green energy trading mechanism in China.

The breeding environment of laying hens has an important influence on the growth of laying hens, the prevention and control of diseases, and the yield and quality of eggs. Therefore, the real-time collection and utilization of the environment information of laying hens is the key point of breeding laying hens. In this study, the environmental information monitoring and control equipment and systems for egg-breeding laying hens were integrated and developed. The real-time monitoring of the environment information of the laying hens and the information query function on the webpage and mobile devices was realized. The stability and versatility testing of equipment and systems were completed through the pilot deployment of equipment and systems in a laying hen farm in Beijing. The design and development of the equipment and system can provide technical support for the modernization, mechanization and information management of laying hens.

In order to effectively solve the problem of over-exploitation of groundwater in Hebei Province and achieve the balance of groundwater recovery, Hebei Province began to conduct pilot research on comprehensive management of groundwater over-exploitation in 2014. Taking Linyi County in the south of Hebei Province as an example, this paper studies the effect of pressure extraction on groundwater over-exploitation comprehensive treatment of water conservancy projects in 2015, analyzes and summarizes the experience, deficiencies and improvement measures of groundwater pressure mining work, in order to follow the groundwater pressure mining work. Provide guidance for reference. The results show that: Linyi County's 2015 water conservancy project achieved a pressure recovery capacity of 4.02 million m 3 , and the water-saving pressure mining effect was remarkable. Among them, the sprinkler irrigation water-saving facilities have an average water saving capacity of 105 m 3 /mu, and the water-saving efficiency is obvious. In addition, the next stage of work should pay attention to the study of water-saving measures based on water-saving management and regional agriculture represented by crop planting structure adjustment. Irrigation pattern, implementation of field engineering work, to form a regional scale, intensive water-saving irrigation pattern, promote the promotion and application of groundwater over-exploitation comprehensive treatment in Hebei Province.