平顶山市2010年麻疹疫苗强化免疫活动的分析

目的分析平顶山市2010年麻疹疫苗强化免疫活动的有关数据及经验,为加速控制和消除麻疹提供依据。方法对收集的平顶山市2010年麻疹疫苗强化免疫数据和现场评估资料进行流行病学分析。结果 2010年全市共摸底麻疹疫苗强化免疫1 043 294人,接种1 016 848人,接种率为97.47%;强化免疫期间,全市共报告麻疹疫苗相关疑似预防接种异常反应(Adverseeffects following immunization,AEFI)20例,发生率1.97/10万,其中严重AEFI 2例,发生率为0.19/10万;共调查了747 790名强化免疫目标儿童的免疫史,其中0剂次占1.01%,免疫史不详占3.81%;采取抽样调查方法对强化免疫活动进行了快速评估,全市共调查应种10 455人,实种10 146人,接种率为97.04%。结论我市首次实施的麻疹疫苗强化免疫活动迅速降低了目标人群的麻疹发病率,形成了有效的免疫屏障,为全市消除麻疹奠定了基础,同时也促进了全市免疫规划工作的规范开展。     

A Complete Detonator,Booster, and Main Charge Study of LX‐07/PBX 9502

A complete study of an exploding bridgewire detonator (EBW), an LX‐07 hemispherical booster and a PBX 9502 outer shell are described. Breakout times from all three are listed in terms of first impact on the booster, i.e., code times. Lucite windows are also used to obtain particle velocities at the edges of each explosive, and these are converted into explosive pressures. The key to modeling is the use of the profile of the aluminum detonator can as it impacts the booster, i.e., we need to know the curvature of the end of the booster can. Modeling even with coarse zoning shows that (i) using reactive flow in the booster is better than programmed burn, (ii) creating the flyer curvature helps, and (iii) creating the time differences of flyer impact helps even more.     

Current status and progresses of SSRF project

The Shanghai Synchrotron Radiation Facility （SSRF）, a third generation light source, comprises a 3.5GeV electron storage ring, a full energy booster, a 150 MeV linac, and seven beamlines in Phase I of the project. Beginning at the end of 2004 with a groundbreaking ceremony, the accelerators were installed in ten months from November 2006, and were successfully tested and commissioned in the past a couple of months. On December 21, 2007, storing electron beams in the storage ring was realized, and the first synchrotron radiations were observed three days later on the front-end of Beamline BL16B of the facility. Now, it runs 3 GeV 100 mA beams with a lifetime of 8-10 hours. Meanwhile, construction of the first seven beamlines （five ID beamlines and two bending magnet beamlines） is progressing on schedule.     

Excitation curve calibration for the SSRF booster magnets and applications in the commissioning

The Shanghai Synchrotron Radiation Facility (SSRF) is a low emittance third-generation synchrotron radiation light source under commissioning.The excitation curve calibration for the booster magnets is important to provide the magnet current configurations as reference.Calibration studies give the polynomial coefficients of each type of magnets and provide the magnet current configurations under different beam energies as beam is ramped at speed of 2 Hz.The applications of calibration in booster commissioning which show the accuracy of the magnetic excitation curve calibration are also discussed.     

一种新型传爆药的研究及应用

介绍了一种爆轰感度高，抗静电，装药性能优良的传爆药，性能测试与应用试验结果表明，该药传爆可靠，爆轰波形对称性好。     

浅谈大型防爆异步电动机防爆型式的选择

介绍了大型防爆异步电动机正确选择防爆型式的重要性,电动机防爆型式的种类及其优缺点,大型防爆异步电动机的最佳防爆型式,可供实际工程设计中防爆电动机的选型作参考.     

增压器单层超高压缸体的强度设计计算

增压器是超高压水射流发生装置的关键设备 ,其设计的合理与否至关重要。文章根据塑性失效设计准则 ,爆破失效设计准则 ,以及相关的计算公式 ,在研究设计中 ,计算了单层缸体的壁厚 ,经实践检验 ,具有可操作性     

大直径直缝焊管用40MN水压试验机组及其流体系统的设计开发

为满足钢管生产企业对大直径钢管进行承压能力试验的需求,太原重型机械集团有限公司设计开发了大直径直缝焊管用40MN水压试验机。该水压试验机组试验压力高,适应产品规格广,生产节奏快。简述了该机组的设备构成、主要技术参数及试验流程;重点介绍了该机组流体系统的设备组成和参数设计以及设计特点等。     

2 GeV增强器高频加速站

按1:1试制了2GeV增强器高频加速站,它由加速腔、宽带放大器、偏流源及频率自动微调回路等组成。经过调试后,指标达到了设计要求。文中阐述了对加速器的技术要求和各主要部件的设计及测试结果。