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Chinese Science Bulletin 1999年第22期44卷 2040-2044页

作者： Changjun Liu Hong Zhang baoyi wang Zishu wang Xizhong wang Sichuan Univ Dept Radioelectr Chengdu 610064 Peoples R China Sichuan Univ Dept Biol Chengdu 610064 Peoples R China

The phenomenon of cell electroporation due to low-intensity transient electromagnetic pulses was studied by using a broad band transverse EM-wave cell (BTEM CELL). The experimental results and preliminary mechanism an... 详细信息

关键词： electromagnetic pulses electroporation cell fusion mechanism analysis.

Effect of Cu on the boron segregation at grain boundaries and vacancy-type defects in ultra-low carbon micro-alloy steels

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Science China(Technological Sciences) 2014年第6期57卷 1135-1141页

作者： YANG RuiJie WU Ping LI XiangLong ZHANG ShiPing CHEN Sen wang baoyi JU Xin Department of Physics School of Mathematics and PhysicsUniversity of Science and Technology Beijing Key Laboratory of Nuclear Analysis Techniques

By thermal neutron irradiation particle tracking autoradiography(PTA)technique,the development of boron segregation at grain boundaries in ultra-low carbon micro-alloy steels was investigated during cooling from 1150°C to 850°C,and the effect of Cu on boron segregation at grain boundaries was *** positron annihilation lifetime(PAL)technique,the changes of vacancy-type defects with temperatures and the effect of Cu on vacancy-type defects in the cooling process were *** show that,the concentration of boron at grain boundaries increases rapidly at the beginning of the cooling;after that,it begins to decrease;and then,it increases gradually *** addition of Cu not only increases the concentration of boron at grain boundaries but also speeds up the development process of boron segregation at grain *** the continuous cooling process,the addition of Cu significantly affects the change of vacancy-type defects with temperatures in ultra-low carbon micro-alloy steels.

关键词： particle tracking autoradiography(PTA) technique boron segregation at grain boundaries positron annihilation lifetime(PAL) technique vacancy-type defects ultra-low carbon micro-alloy steels

Influence of vacancy clusters on the atomic arrangement and displacement threshold energies in Ni_3Al

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Chinese Science Bulletin 1997年第17期42卷 1484-1487页

作者： GU Qiang, wang Yuexia, wang baoyi and wang TianminDepartment of Materials Science, Lanzhou University, Lanzhou 730000, China Department of Materials Science Lanzhou University Lanzhou China

A lot of work has been done to investigate the influence of irradiation on the structure and properties of nuclear reactor materials in high irradiation for the safety and reliability. Although the point defect survival and micromechanism by irradiation are important issues, the evolution of such a region is difficult to follow experimentally, so many results are

关键词： Ni3AI vacancy cluster atomic arrangement displacement threshold energy.

Application of Improved Grey Prediction Model to Petroleum Cost Forecasting

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Petroleum Science 2006年第2期3卷 89-92页

作者： Li Jia wang baoyi Zhang Baosheng School of Business Administration China University of Petroleum Beijing 102249 China

The grey theory is a multidisciplinary and generic theory that deals with systems that lack adequate information and/or have only poor information. In this paper, an improved grey model using step function was proposed. Petroleum cost forecast of the Henan oil field was used as the case study to test the efficiency and accuracy of the proposed method. According to the experimental results, the proposed method obviously could improve the prediction accuracy of the original grey model.

关键词： Grey forecast petroleum cost mutation smooth degree

A Secure Access Control Mechanism Web Service-based in, Extended Organization PKI Networks

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通讯和计算机（中英文版） 2005年第3期2卷 14-18页

作者： ZHANG Shaomin wang baoyi School of Computer North China Electric Power University Baoding 071003 China School of Computer Xidian University Xi＇an 710071 China

Influence of low-temperature sulfidation on the structure of ZnS thin films

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Chinese Physics B 2019年第2期28卷 288-293页

作者： Shuzhen Chen Ligang Song Peng Zhang Xingzhong Cao Runsheng Yu baoyi wang Long Wei Rengang Zhang Department of Applied Physics Wuhan University of Science and Technology Institute of High Energy Physics Chinese Academy of Sciences University of Chinese Academy of Sciences

ZnS thin films were prepared by sulfuring zinc thin films at different sulfuration temperatures. The crystal structure,surface morphology, defects, and optical properties of the thin films were characterized by x-ray diffraction(XRD), scanning electron microscopy(SEM), positron annihilation Doppler broadening, and UV-Vis spectrophotometer, *** was found that the(200)-plane preferred orientation of the ZnS thin films changed to(111)-plane with increasing sulfidation temperature. Moreover, a number of large holes were generated at 420?C and eliminated at 440?C. The concentration of defects was lowest when the sulfuration temperature was 440?C. The optical transmission of all samples was maintained at 60%–80% in the wavelength range of 400 nm–800 nm, and the band energy of the ZnS thin films was approximately3.5 e V for all treatment temperatures except 430?C.

关键词： ZnS thin films low-temperature sulfidation Doppler broadening measurements

Design of a high-sampling-rate electronic module for array-detector positron annihilation lifetime measurements

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Radiation Detection Technology and Methods 2019年第3期3卷 127-135页

作者： Jiale Cai Daowu Li Yingjie wang Zhiming Zhang Peilin wang Haohui Tang baoyi wang Xingzhong Cao Fuyan Liu Long Wei Beijing Engineering Research Center of Radiographic Techniques and Equipment Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

Introduction In this study,a high-time-resolution electronic module with a high channel density and low power consumption was designed for the measurement of the multi-detector array positron annihilation *** electronic module consisted of 32 input channels,and each channel provided a high sampling rate up to 5.12 GSPS based on a Domino Ring Sampler 4(DRS4)*** to the high-speed flash analog-digital converter(FADC),DRS4 chip has a higher channel density with an affordable lower price and power *** The developed electronic module was also capable of real-time data analysis for directly extracting the time information of input signals at the data acquisition site,thereby significantly decreasing the data *** digital constant fraction discriminator(DCFD)algorithm was implemented in the field programmable gate array(FPGA)for performing the time *** The coincidence time resolution of the electronic module was measured,and the test results revealed a value of 26 ps.A prototypical 16-pixel detector module of the multi-detector system was evaluated using this electronic module,and the coincidence time resolution of the prototypical module was 411.84 *** The electronic module was confirmed to satisfy the severe requirements of the multi-array-detector positron annihilation lifetime measurement *** was also suitable for other high-time-resolution,high-channel-density,costeffective,and low-power-consumption applications.

关键词： Digital constant fraction discriminator FPGA DRS4 Positron lifetime

COMPUTATION OF EM FIELD DISTRIBUTION IN A BIOLOGICAL MEDIUM AND EXPERIMENTAL CONFIRMATION

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Journal of Electronics(China) 1991年第1期8卷 36-43页

作者：王保义 Dept. of Radio Sichuan University Chengdu

Theory and numerical computation of EM field distribution rule in a biologicalmedium with irregular shape are described. Integral equations of induced EM field distributionin biological body are deduced from EM field scattering. Numerical computations are conductedby the moment method. In order to verify the effectiveness of the theory, a set of experimentalequipment is designed precisely. The results of numerical computation are compared with mea-sured values. It is shown that they are in good agreement. This theory can be used widely forits generality.

关键词： EM field Biological medium Moment method

A Cache Considering Role-Based Access Control and Trust in Privilege Management Infrastructure

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Wuhan University Journal of Natural Sciences 2006年第6期11卷 1827-1830页

作者： ZHANG Shaomin wang baoyi ZHOU Lihua Key Laboratory of Computer Network and Information Security Ministry of Education Xidian University Xi＇an 710071 Shaanxi China School of Computer North China Electric Power University Baoding 071003 Hebei China

PMI （privilege management infrastructure） is used to perform access control to resource in an E-commerce or E-government system. With the ever-increasing need for secure transaction, the need for systems that offer a wide variety of QoS （quality-of-service） features is also growing. In order to improve the QoS of PMI system, a cache based on RBAC （Role-based Access control） and trust is proposed. Our system is realized based on Web service. How to design the cache based on RBAC and trust in the access control model is deseribed in detail. The algorithm to query role permission in cache and to add records in cache is dealt with. The policy to update cache is introduced also.

关键词： access control RBAC(role-based access controd trust cache PMI (privilege management infrastructure)

Office Automation System and Its Security Design

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计算机工程 2002年第S1期28卷 92-96页

作者： wang baoyi,ZHANG Shaomin (Dept. of Computer Science and Engineering, North China Electric Power University, Baoding 071003, China) Dept. of Computer Science and Engineering North China Electric Power University Baoding 071003 China

Analyzing the specialties of OAS network based on Internet/Intranet, aiming to these specialties design the OAS network’s system structure. Analyzing the security threats that the OAS network faces to and the possible attacking means. This paper puts forward five security tactics and security design in detail, and a sensible conclusion is proposed at last.

关键词： Internet/Intranet Network security RSA MD3 ACL Firewall