New advances in nanotechnology are driving a wave of technology revolution impacting a broad range of areas in agricultural production. The current work reviews nanopesticides, nano-fabricated fertilizers, and nano activity-based growth promoters reported in the last several years, focusing on mechanisms revealed for preparation and functioning. It appears to us that with many fundamental concepts have been demonstrated over last two decades, new advances in this area continue to expand mainly in three directions, i.e., efficiency improvement, material sustainability and environment-specific stimulation functionalities. It is also evident that environmental and health concerns associated with nano agrochemicals are the primary motivation and focus for most recent work. Challenges and perspectives for future development of nano agrochemicals are also discussed.

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By analyzing the present status of water supply system of our country, the concept of subarea of city water supply system is detailed. Pointing out that the subarea is the foundation of optimal control. Then the method of subarea based on the boundary of water supply and the pressure of the nodes is brought forward, and how to programming between and in the small area is discussed. Through subarea, the functions of pipes are definite. So we can more easily compute the flow of some area, control the pressure of pipes, optimize the water supply system. Thus, the aim to reducing the pipe leaks and improving the benefit on economy is obtained.

With the rapid development and promotion of Internet technology and information technology, the complexity of college student management is increasing. China has stepped into the era of big data. In order to ensure the smooth implementation of college student management, universities need to actively apply big data technology, strengthen the optimization of top-level design, and improve the level of student management information. At the same time, it is necessary to introduce and cultivate management talents capable of analyzing big data. They are especially responsible for the management of college students; scientifically formulating data standards, establishing a "university engineering system", and improving the efficiency and quality of management work.