摘要：为避免带电作业人员在封闭的屏蔽服中因热应力而引发的事故,基于热应力理论,研发一套基于人体体征的作业人员安全预警系统。首先,分析人体状态参数,并将其设置为预警系统的阈值;然后,提出安全预警方法,并从电源、微处理器、无线上网(Wi Fi)通信、数据采集、报警等5个模块介绍安全预警系统的设计思路;最后,利用样机进行Wi Fi通信功能测试、心率检测功能测试以及电磁兼容试验。结果表明:该系统续航能力大于8 h,Wi Fi通信距离大于15 m,心率误差小于3%,可在300 kV高压环境下正常工作。

摘要：针对现有用于特高压带电作业的闭式卡存在的不足,通过对通用结构研究和材料选型设计,设计研制碳纤维通用闭式卡,并利用仿真力学计算对闭式卡具结构进行静力学分析。计算结果表明:闭式卡受力薄弱环节位于双耳螺栓孔,在3倍额定荷载(240 kN)下,卡具最大应力达到58.78 MPa,最大位移量为0.007 156 mm,最小安全系数为5.1。机械强度校核试验结果表明,闭式卡的破坏荷载达到260 kN,满足设计要求。该轻质化碳纤维闭式卡是特高压带电作业大吨位工器具的升级换代产品,具有重要的工程实际意义。

摘要：受自身以及外界环境的影响,大部分当代大学生对其生活满意程度较低。本教学设计旨在通过各种教学活动,引导大学生培养自己健康、积极的生活态度,学会生活,从而提高对生活的满意程度。

摘要：科学系统的阅读引导可以正向影响个体的学习行为,国内图书馆的阅读推广活动在内容定位、形式创新、推广渠道拓展、交流反馈和评价机制上还存在着不足。在借鉴部分图书馆阅读推广成果和经验的基础上,国内图书馆可从以下方面促进阅读推广的研究与实践:加强通过社交媒体进行的推广,建立图书馆的立体阅读推广模式,发挥品牌效应,制定分阶段参与机制,建立完善的阅读推广评价体系。

摘要：介绍一种区别于传统人字形波纹板式换热器的新型微板换热器,该换热器具有压降小而换热能力强,材料消耗少,可靠性好,制冷剂充注量小,设计灵活等特点,同时介绍其在应用和节能减排上的优势。

摘要：A state-of-the-art high energy heavy ion microbeam irradiation system is constructed at the Institute of Modern Physics of the Chinese Academy of Sciences. This microbeam system operates in both full current intensity mode and single ion mode. It delivers a predefined number of ions to pre-selected targets for research in biology and material science. The characteristic of this microbeam system is high energy and vertical irradiation. A quadrupole focusing system, in combination with a series of slits, has been designed to optimize the spatial resolution. A symmetrically achromatic system leads the beam downwards and serves simultaneously as an energy analyzer. A high gradient quadrupole triplet finally focuses a C^6＋ ion beam to 1 μm in the vacuum chamber within the energy range from 10 MeV/u to 100 MeV/u. In this paper, the IMP microbeam system is described in detail. A systematic investigation of the ion beam optics of this microbeam system is presented together with the associated aberrations. Comparison is made between the IMP microbeam system and the other existing systems to further discuss the performance of this microbeam. Then the optimized initial beam parameters are given for high resolution and high hitting efficiency. At last, the experiment platform is briefly introduced.