In order to reduce carbon pollution of micro channel plate (MCP) caused ins sputtering process of ion barrier film, use principle of ultraviolet-ozone decomposition, then the oxygen has been flowed into ultraviolet-ozone decomposition instrument, and 4 pieces of MCP have been Irradiated 30 hours to decompose Carbon and organic. It is showed by testing and analysis after the test that the carbon pollution reduced significantly, and ion barrier film was not damage and electrode was not oxidative. Current gain increased 3.95% after this method finally.
Hybrid vehicular power system is a complicated and nonlinear system, and its energy management strategy is one key factor for vehicle performance. The hybrid powertrain consisting of engine, Ni-MH battery and ultra-capacitor is designed, and the energy management strategy for a hybrid vehicular power system is proposed by Haar wavelet which makes vehicle power demand into high frequency and low frequency parts, then distributed among engine, Ni-MH battery and ultra-capacitor by genetic algorithm with the aim of reducing fuel consumption, therefore, improves the system performance and lengthens the service life of components. System modeling and simulation are conducted in Matlab, and the results show that this method of power distribution can meet the design requirements, and have better fuel economy compared to fuzzy control strategy.
The paper puts forward and discusses a 1/2 order net-grid-type analog fractance circuit. Furthermore, it finds out that our 1/2 order net-grid analog fractance circuit is superior to the classical 1/2 order tree-type one by comparing the structure and function of each other. On this bases, it further puts forward and discusses a general recursive net-grid-type analog fractance circuit for any order fractional calculus. The results educing by the paper are the basis for further theoretic research and engineering implement for structuring fractance circuit of any order fractional calculus
Micro-channel Plate (MCP) with Ion Barrier Film(IBF) is one of the main technical indicators that restrict the performance of the third generations of Low Light Level Image Intensifier(LLLII). IBF with inferior quality can be a direct impact on the performance of the third generations of LLLII or even makes it not work, and it’s very unfavorable in the tube mass production and promotion. In response to this urgent requirement, in order to improve the quality and preparation of the finished product of the Al2O3 on the input side of MCP prepared by magnetron sputtering, the paper carries out the process optimization of magnetron sputtering used for image intensifier. By simulation of Ar ion bombarding Al2O3 target, while under the guidance of the working principles of the magnetron sputtering and thin film growth theory, we change the working pressure、 sputtering power、 argon flow and other process parameters by using magnetron sputtering machine developed in China, to change the coating deposition rate of Al2O3, and to increase the lateral migration of the film-forming process of Al2O3. Finally we prepare a uniform、 continuous and compact Al2O3 Ion Barrier Film. At last the optimal technique is obtained: Sputtering pressure is 2.6×10-1Pa, Ar2 flux is 90sccm, sputtering power is 170W, and the thickness of film is 80Å. We test the performance of MCP with optimized films by using the MCP performance testing devices, contrasting with pre-fabricated thin-film quality, and the results show that the average gain decline is dropped, the dead volt is lower, and the quality of the films prepared by this process is significantly better, yield and view pass rate is as high as 90%, meeting the dual demands of high electronic transmittance and high ion blocking rate of IBF.
The noise factor, which is the main factor affecting the noise performance of image intensifier and can accurately reflect the noise characteristics of the microchannel plate, is the ratio of the input signal to noise ratio and the output signal to noise. According to definition of noise factor of microchannel plate and test principle, filmed MCP test system was established in order to study the technical way to reduce noise factor of MCP. The input surface of the MCP was covered with ion feedback film, which had a great impact on the noise factor of the MCP. Hence, noise factor of filmed MCP and un-filmed MCP were measured respectively, and the noise factor with different material, different channel pore, different incident electrons and MCP voltage were measured too. Relationships between noise factor and incident electron, noise factor and MCP voltage was obtained. That was valuable to reduce the noise of filmed MCP.
In this paper the degradation behavior of leachate of dump sites is studied respectively in natural environment condition and in artificial environmental condition in order to analyze that environmental factors that affect the stabilization process of the dump sites in the north cold area.The degradation procedures of COD,BOD and ammonia nitrogen of landfill leachate in different environmental conditions are investigated.The results show that the degradation velocity of leachate of dump sites is affected significantly by seasonal factor in the north cold area.The degradation velocity in natural environment condition is faster than that in artificial environmental condition,which indicates the degradation procedure of leachate is affected significantly by the natural precipitation,microbial diversity and heat dissipation.
'/%3e%3cuse xlink:href='%23a' transform='rotate(23.036 .093 25.536)'/%3e%3cuse xlink:href='%23a' transform='rotate(45.87 1.273 16.18)'/%3e%3cuse xlink:href='%23a' transform='rotate(69.945 .996 12.078)'/%3e%3cuse xlink:href='%23a' transform='rotate(20.66 -19.689 31.932)'/%3e%3c/svg%3e)