最新刊期
      卷 0 ， 期 0 ， 2020
      • SUN Xiaoying SHEN Liren DAI Zhimin
        Issue 8, (2004)
        摘要：In this paper, the drawback of usual two-tier database architecture was analyzed and the Shanghai Deep Ultraviolet-Free Electron Laser database system under development was discussed. A project for realizing the multi-tiered database architecture based on common object request broker architecture (CORBA) component and middleware model constructed by C++ was presented. A magnet database was given to exhibit the design of the CORBA component.  
        关键词：Database;Common object request broker architecture (CORBA);Free electron laser   
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        发布时间：2021-03-12
      • TONGYongpeng TAN Mingguang LI Yan CHEN Jianmin ZHANG Guilin HWU Yeukuang Tsai Wen-Li Hsu Pei-Cheng Jung Ho Je SONG Weimin IIANG Rongfang G Margaritondo
        Issue 8, (2004)
        摘要：PM2.5 aerosol solution was instilled into Sprague-Dawley (SD) rats’ lungs that were then extracted and examined by synchrotron refractive-index microradiography. The instilled lung tissues were fixed by formalin and the corresponding lung tissues for histopathologic study were embedded in paraffin. X-ray microradiographs revealed an increase in the number of air filled vesicles that correlated with inflammation derived from histopathologic graphs. Microradiography also detected bleeding in some areas of the inflamed lung tissue with trapped air. These results suggest that the physiologic functions of the lung alveolus change shortly after inflammation and that bleeding areas develop from areas where air is trapped - eventually leading to lung cell death.  
        关键词：Synchrotron;X-ray microradiograph;Phase contrast;Lung tissue;PM2.5 toxicity   
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        发布时间：2021-03-12
      • SUN Litao GONG Jinlong ZHU Zhiyuan ZHUDezhang HE Suixia WANG Zhenxia
        Issue 8, (2004)
        摘要：The transformation of carbon nanotubes to nanocrystalline diamond was accomplished by combining carbon ion irradiation with H2 plasma, which led to a process of order-to-disorder-to-order transition. Transmission electron microscopy (TEM), selected-area electron diffraction (SAED) and Raman spectroscopy were carried out to investigate microstructure of the crystalline grain. The mechanism of transition from carbon nanotubes to diamond nanoparticles was discussed.  
        关键词：Carbon nanotubes;Ion irradiation;Diamond   
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        发布时间：2021-03-12
      • LI Rongwu ZHAO Weijuan LI Guoxia XIE Jianzhong GUOMin ZHANG Bin WU Xiaoli YAO Guifang GAO Zhengyao FENG Songlin HUANG Zhongxiang JIA Xiuqin
        Issue 8, (2004)
        摘要：11 samples of ancient Chinese Ru porcelain from Qingliangsi kiln, 23 samples of ancient Chinese Guan porcelain from Jiaotanxia kiln and 4 samples of modern archaized Guan porcelain were obtained to determine the contents of elements in each of them by neutron activation analysis (NAA). The NAA data were further analyzed using fuzzy cluster analysis to obtain the fuzzy cluster trend diagrams for the bodies samples and the glazes samples respectively. The analysis shows that the raw material origins of the Jiaotanxia ancient Chinese Guan porcelain bodies samples are very concentrated; those of the Qingliangsi ancient Chinese Ru porcelain bodies samples are a little dispersed; those of ancient Chinese Guan porcelain glazes samples are relatively concentrated; those of ancient Chinese Ru porcelain glazes samples are dispersed; and the origins of the raw material of ancient Chinese Guan porcelain glazes samples are obviously different from those of ancient Chinese Ru porcelain glazes samples. The bodies samples and glazes samples of Jiaotanxia ancient Chinese Guan porcelain and those of Qingliangsi ancient Chinese Ru porcelain have some difference but can be compared with each other.  
        关键词：Jiaotanxia ancient Chinese Guan porcelain;Qingliangsi ancient Chinese Ru porcelain;Neutron activation analysis;Provenance relation   
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        发布时间：2021-03-12
      • LI Xinnian FANG Xiaoming
        Issue 8, (2004)
        摘要：Since bismuth germanate (BGO) crystal, a well known inorganic scintillator, has been widely used in high energy physics and in nuclear radiation detection, it is necessary to consider its irradiation hardness (radiation resistance. In this work, the BGO crystals were irradiated by 14 MeV fast neutrons with two differential fluences and used as the detector of a 7 spectrometer. The background spectra and 137Cs γ spectra were measured respectively. The irradiation hardness of the BGO crystals has been investigated through the changes of the spectra after irradiation and the recoveries after annealing at different temperatures .  
        关键词：Bismuth germanate crystal;Radiation-induced damage;Irradiation hardness   
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        发布时间：2021-03-12
      • CUI Shuai YU Xuefeng REN Diyuan ZHANG Hualin
        Issue 8, (2004)
        摘要：The influences of irradiation condition, annealing temperature and gate bias on CC4007 NMOS FETs, with and without F+ implanted, have been compared. It is found that the radiation-induced shift of threshold voltage can be restrained by implanting minute amount of fluorine ions. And , reliability of the F+ implanted devices was verified by smooth changes of both interface state charge and oxide state charge during the annealing.  
        关键词：Irradiation;F+ implantation;NMOS;Threshold voltage;Annealing;Reliability   
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        发布时间：2021-03-12
      • LU Xinxin LIU Rong WANG Mei JIANG Li LIN Jufang WEN Zhongwei WANG Dalun
        Issue 8, (2004)
        摘要：High-threshold-energy activation reaction rates were measured in cylindric combined materials bombarded by D-T neutrons with 6 threshold-energy detectors Fe, Al, Nb, F, Zr and Cu. The experimental results are discussed. MCNP/4B code was used to calculate the activation reaction rates on the experimental device. The calculated results are compared with the experimental ones. It shows that the discrepancies are 10%-30% except for the F activation reaction rate.  
        关键词：Threshold-energy detector;Absolute activation reaction rate;Mounte Carlo N-Particle Transport code;Nuclear database   
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        发布时间：2021-03-12
      • LU Qingfeng DU Baoli LI Xigui
        Issue 8, (2004)
        摘要：The positron lifetime spectra of La2-xMxCuO4 (LMCO, M=Sr, Ba, x=0.05, 0.10, 0.125, 0.15, 0.2) were measured at room temperature for studying the long-standing mystery of "1/8 abnormal" in doped lanthanum cuprate. Electron density ne and void concentration (number density) CV were calculated as a function of substitution content x. The appearance of peak (ne) and valley (Cv) at x=0.125 and the correlation with superconductivity were discussed.  
        关键词：La2-xMxCuO4 superconductor;Positron lifetime spectra parameters;Doping;Peak value response   
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        发布时间：2021-03-12
      • YUYanbao WANG Yongxian YU Junfeng YIN Duanzhi
        Issue 8, (2004)
        摘要：Radiation synovectomy is an attractive alternative to surgical or chemical synovectomy for the rheumatoid arthritis. The procedure requires only an intra-articular injection of a radiopharmaceutical with the appropriate nuclear radiation to counteract and control synovial inflammation. Lots of patients and studies have responded well or shown the effectiveness. In this article the biological and clinical results obtained with radiation synovectomy are summarized and reviewed. Radionuclide characteristics, kinds of carriers, evaluation of dosimetry and methods of controlling particle size so as to minimize the leakage from the cavity are thoroughly discussed.  
        关键词：Radiation;Synovectomy;Rheumatoid arthrosis;Rhenium   
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        发布时间：2021-03-12
      • SUN Liang
        Issue 8, (2004)
        摘要：The principle of Vondrak smoothing method was introduced briefly. After smoothing practical biokinetic data, the expressions of activity in tissues or organs vs time were obtained by index fitting. Internal radiation doses were estimated subsequently. The results show Vondrak method was useful in practice.  
        关键词：Vondrak smoothing;Pretreatment;Internal radiation dose   
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        发布时间：2021-03-12
      • QIANG Yonggang LIAO Yonghua
        Issue 8, (2004)
        摘要：The process of preparing an imaging micro-probe 99Tcm-CLP from bovine nose cartilage is described in detail. Both labeled rate and radiochemical purity of 99Tcm-CLP are greater than 90%, and KA is 1.12 × 109L/mol in vitro. After the Balb/c nu/nu mice with lung cancer were intravenously injected by the 99Tcm-CLP, the radioactivity was found to be well concentrated at the lung-cancer region, which suggests that the 99Tcm-CLP micro-probe can be used in imaging study of desmohemoblast on lung carcinoma.  
        关键词：Lung carcinoma;Imaging probe;99Tcm-CLP   
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        发布时间：2021-03-12
      • HANG Jianzhong CAO Weiguo BAOBorong HUANG Wei CHEN Jie
        Issue 8, (2004)
        摘要：The synergistic extraction of U(VI) with HCBMPPT[4-(2-chloro)benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione] and TBP in toluene from nitric acid solution was studied. The result shows that the distribution ratio of U(VI) increases rapidly when the concentrations of HCBMPPT, TBP and the salting-out agent increase. Meanwhile, with the increasing of the aqueous phase pH, the distribution ratio of U(VI) also increases. The chemical composition of the synergistic extracted complexes and the mechanism of the synergistic extraction reaction were also discussed.  
          
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        发布时间：2021-03-12
      • LIU Linli QIANG Sheng SONG Xiaoling
        Issue 8, (2004)
        摘要：To evaluate the possibility of gene flow through observation of the sexual compatibilities of transgenic herbicide-resistant rice with wild relatives by using isotope tracer to label pollen grains, the experiments on radioactivity, tracer mode, autoradiography film and time were conducted. Better procedure was to label pollen grains of transgenic herbicide-resistant rice by culturing the rice in a 1.48 × 107 Bq /L 32P nutrient liquid, to pollinate the labelled pollen grains on the stigmas of barnyard grass (Echinochloa crusgalli var. mitis),Oryza officinalis and weedy rice(Oryza saliva) respectively, and then 3 hour later, to fix these pistils on a piece of glass plate and cover the film of Luck 400 on it for autoradiography . The autoradiographs show that the tube of the transgenic rice’s pollens cannot penetrate the stigma of barnyard grass and arrive at embryo sacs to fertilize, so that the possibility of gene flow between them is the lowest; the tube of the labelled pollens can penetrate the stigma of O.officinalis and enter the style but can not arrive at embryo sacs to fertilize, so the possibility of gene flow between them is relatively low; and the pollen tube can arrive at the embryo sacs of the weedy rice, so that the possibility of gene flow is relatively high from transgenic herbicide-resistant rice to weedy rice.  
        关键词：32P isotope tracer;Autoradiography;Transgenic rice;Gene flow   
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        发布时间：2021-03-12
      • XU Ruinian ZHAO Liying CHEN Huanguang CAO Hongping LI Deming
        Issue 8, (2004)
        摘要：A prototype interface device with an MCU core used for controlling a high-stability switch-mode huge power supply with high precision has been developed in our institute. This interface adopts a structure of the main case separated from the panel. The main functions include current setting and acquisition, detection of running status and error, and communication with computer. In this paper, the structure of the device, both hardware and software design, and test results are described.  
        关键词：Intelligence interface;MCU;High precision;Magnet power supply   
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        发布时间：2021-03-12
      • LI Hui GUO Wenkang XU Ping YUAN Xingqiu ZHAO Taize
        Issue 8, (2004)
        摘要：A combustion device of coal powder using arc plasma is designed and studied, which has simple structure and can keep steady combustion. It takes full advantage of the characteristics of arc plasma, such as high temperature, high thermal power density of unit volume of fuel, high chemical reactivity and so on. Coal powder injected into the device can drastically bum with a great deal of air after the coal powder is gasified and activated by the arc plasma with fixed rate of thermal power input. The elementary experiment results show that the device can keep steady combustion and the temperature of the flame center is about 1150-1260℃ at the outlet of the main combustion chamber, and that the ratio of the input power of arc plasma to the thermal power of coal powder is about 1 : 25.  
        关键词：Plasma combustion device;Coal powder;Arc plasma;Clean combustion   
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        发布时间：2021-03-12
      • CHEN Yong LUO Qinlin LV Xiafu
        Issue 8, (2004)
        摘要：A system for automatically diluting and dividing radioisotopes is introduced. Its executive equipment is composed of step motors, exact screws, and precise syringes. In addition, the programmed software makes all these parts work together properly, stably and effectively. The system satisfies the request of iatrical radioisotope diluting and dividing, that is, with high precision, zero-pollution, and so on. The tryout of this system has achieved good result.  
        关键词：Automatic diluting and dividing system;Dividing;Diluting;Executive equipment;latrical radioisotopes   
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        发布时间：2021-03-12
      • JIANG Chao ZHUYuqun LIU Yuan ZHOU Gang
        Issue 8, (2004)
        摘要：BWR ( Benedict-Webb-Rubin) formula, we have studied the relationships between the required inner pressure at 500 K, 400 K, 300 K, 77 K, 35 K, respectively, in the micro balloon’s diameter of 100 μm, 200 μm, 400 μm, 520 μm, respectively, and the thickness of liquid layer in the target at 22 K . We found that the fuel pressure at low temperature is much more lower than that at room temperature.  
        关键词：Inertial confinement fusion target;Filling parameters;Low temperature   
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        发布时间：2021-03-12
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