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Coal and gas outburst mechanism of the “Three Soft” coal seam in western Henan

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Mining Science and Technology 2010年第5期20卷 712-717页

作者： LEI DongJi LI Chengwu zhang zimin zhang Yugui Faculty of Resources & Safety Engineering China University of Mining & Technology Beijing 100083 China School of Safety Science and Engineering Henan Polytechnic University Jiaozuo 454003 China

Based on the particularities of gas outbursts,i.e.,low gas bearing capacity and low gas pressure in the "Three Soft" coal seam in western Henan,we applied the theories of plate tectonics and regional structural evolution to investigate the mechanism of this seam and its impact on the coal seam gas *** investigation revealed that coal and gas outbursts are distributed in a strip in a NW direction,with a number of high-penetration mines scattered towards the south side and low-gas mines largely located on the north *** analyzed the statistics of 38 gas explosions and the rock-coal sturdiness number coefficient f of 167 sampling sites in the region and found the gas outburst mechanism that features a "low indicator outburst phenomenon".The mechanism is characterized by structural coal as its core,a low gas bearing capacity,low gas pressure and sturdiness coefficient f mostly less than *** research results provide a theoretical foundation for effective control of gas disasters.

关键词： coal and gas outburst mechanism investigation threshold sliding structure

The Application of LM-BP Neural Network in the Prediction of Total Output Value of Agriculture

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Asian Agricultural Research 2015年第2期7卷 88-91页

作者： zimin zhang Yanying FAN Guanping CHEN Center of Education Technology Hezhou University School of Computer Science and Information Engineering Hezhou University

Gross agricultural product is an important indication to measure the agricultural development level of a region. It would be affected by many factors,having the characteristics of non- linearity. For this reason,LM- BP neural network was put forward as the model and method for predicting gross agricultural product. Taking the indications of the sown area of crop,the output of grain,sugarcane,cassava,tea,meat,aquatic products,turpentine and camellia seed,etc. as inputs,during 2000 to 2012 in Guangxi,the gross agricultural product data from the analysis of simulation experiment show that the prediction of LM- BP neural network fits well with actual results.

关键词： Total output value of agriculture Artificial neura

6-48 Design of the LLRF System for Electron Linear Accelerator

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IMP & HIRFL Annual Report 2015年第1期 326-327页

作者： Zhou Youwei Cao Shuchun Shen Xiaokang zhang zimin 不详

Institute of Modern Physics (IMP) is planning to construct an Electron Linear Accelerator for the research of high energy electron radiography, which consists of a thermionic RF Gun, photo cathode RF Gun, low energy beam transport line, SLAC TW acceleration tube and imaging terminal. In order to meet the demand of high energy density physics, the energy of electron beam must be up to 100 MeV. Table 1 summarizes the primary parameters of the Electron Linear Accelerator.

关键词： Electron Linear Accelerator

Numerical Simulation Multicomponent Ion Beam Transport form ECR Ion Source

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2003年第1期 147-148页

作者： Ma Lei, Song Mingtao, zhang zimin and Cao Yun

In order to simulate the transport of multi-components ion beam extracted from an ECR ion source, we have developed a multi-charged ion beam transport program named MCIBS 1.0. The program is dedicated to numerical simulation of the behavior of highly-charged ion beam and optimization of beam optics in transport lines and is realized on a PC with Windows user interface of Microsoft Visual Basic. Among all the ions with different charge states in the beam, the exchanges of electrons between highly charged ions and low charged ions or neutral,atoms of residual gas are taken into account by using classical Molecular Over-barrier Model and Monte Carlo method. An advanced Windows graphical interface makes it; comfortable and friendly for the user to operate in an interactive mode. The present program is used for the numerical calculation and optimization of beam optics in a transport line consisting of various magnetic elements, such as dipole magnet, quadrupole and so on. It is possible to simultaneously simulate 200,000 particles, in a transport line of 340 m at most, and show every particle orbit. Beam cross section graphics and emittance phase pictures can be also shown at any position in the transport line.

关键词：数字仿真多成分离子束传送器离子源 ECR 磁元素作图法

4-32 Damage Effects of Mechanical Properties of Silicon Carbide Fiber Irradiated by Electron Beams

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IMP & HIRFL Annual Report 2016年第1期 150-151页

作者： zhang Liqing zhang Chonghong Chen Yuguang Yan Tingxing Xiao Rongqing zhang zimin 不详

Continuous silicon carbide fiber reinforced silicon carbide(SiCf/SiC)composites have been considered to be candidate materials of high temperature structural application in aerospace,energy conservation and power generation due to the excellent high temperature mechanical properties,good fracture resistance,corrosion resistance and thermodynamic ***,due to the high thermal stability,low induced radioactivity,quick decay of activity and low afterheat,SiCf/SiC composites have been recognized as the promising materials of fission and future fusion ***/SiC composites are composed of SiC fiber and SiC marix *** resistance,oxidation tolerance,fracture toughness and tensile strength of SiC fiber have a direct impact on the SiCf/SiC composites performance.

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6 - 12 Primary Studies of Dielectric Wall Accelerator

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IMP & HIRFL Annual Report 2010年第1期 275-276页

作者： Zhao Quantang zhang zimin Cao Shuchun Shen Xiaokan Yuan Ping

Experimental Research of Extremely High Spatial-resolution Cascaded High Energy Electron Radiography at HERPL

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IMP & HIRFL Annual Report 2022年第1期 278-279页

作者： Ran Zhaohui Li Jia Zhou Youwei Cao Shuchun zhang zimin 不详

To study the structure and characteristics of nuclear materials,many diagnostic tools has been *** the main features of the strong penetrating power,high space-time resolution,and large area density diagnostic range H... 详细信息

关键词： materials Electron resolution

6-47 Primary Research of ILC Positron Source Target Cooling

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IMP & HIRFL Annual Report 2015年第1期 325-326页

作者： zhang Xiaoming zhang zimin Cao Shuchun Shen Xiaokang Zhao Quantang Zong Yang Wang Yanru 不详

In recent years, the idea for undulator based Positron source had become a current design for international linear Collider (ILC). This design is that the beam from the electron main linac passes through a long helical undulator to generate a highly polarized and multi-Mev photon beam which hits a thin metal rotating target to generate showers of Positron[1]. During this procedure, the multi-Kev energy Positron will heat target and then damage the rotating target system[2].

关键词： Source Target Cooling

Crosslinking Degree Analysis of EB Irradiated PAN-PEO Gel

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IMP & HIRFL Annual Report 2011年第1期 223-224页

作者： Ma Yizhun zhang zimin Li Zhongping Cao Shuchun Xiao Rongqing Jing Yi