共查询到20条相似文献,搜索用时 62 毫秒
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生物安全三级实验室的空调系统是影响风量、换气次数和压差三大设计参数的关键性要素。与洁净室的空调系统相比,其不仅控制洁净度级别与温湿度,而且更侧重于管理负压梯度与向内定向气流。总结了生物安全三级实验室空调系统联动调试的方案设计与步骤(尤其是风量和压差),并讨论了送排风方式、风量计算与控制、负压梯度控制、送排风机变频转换,压力梯度动态控制措施等。 相似文献
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关于生物安全实验室压力控制的探讨 总被引:1,自引:0,他引:1
生物安全实验室的安全性与通风空调系统的设计、施工、运行、管理密切相关,在空间上予以物理阻断,避免污染和交叉感染是保证人员和环境安全的主要措施。本文就生物安全实验室压力控制的不同方法进行比较,介绍了文丘里压力控制阀的基本原理、特点,及工程的实际应用效果。 相似文献
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艾滋病研究用P3级生物安全实验室 总被引:1,自引:0,他引:1
结合设计与施工体会,对艾滋病研究用P3级生物安全实验室的分级、生物安全操作、实验室建设中的问题进行了探讨,举例指明了目前生物安全实验室建造中的问题。 相似文献
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简要介绍了生物安全实验室的分级,就生物安全实验室施工中可能存在的某些问题进行探讨,供准备建造生物安全实验室的单位及施工单位参考. 相似文献
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微生物危害和生物安全防护实验室环境控制 总被引:5,自引:0,他引:5
本文介绍了中外生物安全防护实验室的分级标准及其操作对象。从空调通风的角度探讨了生物安全防护实验室的环境控制。最后分析了国内此类建筑建设方面的几种误区。 相似文献
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The authors describe the development trends and results of millimeter-wave systems in Japan in such fields as communication, radar, and measurement systems. The applications included are the W-40G waveguide transmission communication system, an automobile traffic control system using the 60-GHz band, a collision avoidance radar system for an automobile, a plasma electron density measuring system, and satellite communication. The authors describe the development of devices such as high-power FET amplifiers, traveling wave tube amplifiers (TWTAs), IMPATT amplifiers, low-noise amplifiers, and monolithic microwave integrated circuit (MMIC) devices used in constructing the millimeter-wave systems 相似文献
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《Electron Devices, IEEE Transactions on》1972,19(4):524-531
A review is given of the progress in electrophotographic science and technology in Western Europe during the years 1967 to early 1971. University research work is mainly directed towards two areas: 1) the electrical and physical properties of photoconductors, such as selenium, chalcogenides, oxides, and organic materials; and 2) the sensitization of these photoconductors. Industrial research teams report on the preparation of electrophotographic layers on development and on image evaluation. A bibliography including scientific papers and patents published on this subject during said period completes this review. 相似文献
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Experiments have been performed to investigate whether switching phenomena are observable in ion-irradiated GaAs. It is found that the V/I characteristics of H2+-and N+-irradiated layers show both negative resistance and switching from a high resistance to a low resistance state. Ion irradiation may thus be a useful method of fabricating switching devices. 相似文献
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Before the establishment of the People's Republic, China was a semi-colonial, semi-feudal society plagued by foreign interventions and internal power struggles. It was against this background that the electrical industry went through its infancy. Today, the People's Republic of China is facing an acute energy shortage, posing a problem which must be quickly overcome if the country's rapid industrialisation is to continue as planned. The author presents a brief history of power generation in China from 1949 to 1983 and examines possibilities for the future 相似文献
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Ghana has recognized the need for efficient and reliable telecommunication services. The widespread availability of these services will promote the nation's economic advancement and the decentralization of the government's activities. To achieve the objective of bringing telecommunications to all the people of Ghana, private sector participation is considered essential as a source of management skills, technology, and financing that will be required for the provision of services. In order to attract such participation, Ghana is putting in place the necessary policy, institutional, and regulatory frameworks to create an enabling environment for private sector investment in the telecommunication sector 相似文献
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游小明 《信息安全与通信保密》2003,(5):16-17
信息安全在IT业中的角色演变 在当今信息时代,信息技术日新月异,信息产业已经成为拉动GDP增长的第一支柱产业,并以每年20%—30%的速度迅猛发展。其发展过程也经历了从传统IT向新型IT的转变,其中一个重要的转变因素便是信息安全。 1.传统IT与信息安全的关系。传统IT涵盖了五大类:通信、网络、计算机、软件、电子材料及元器件。这五类IT行业本身的发展一度呈现结构失衡:一方面过度投资到“信息高速公 相似文献
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中国带电清洗技术的突破 总被引:2,自引:0,他引:2
一、电路故障的成因 通常,由于空气的污染和设备所处的环境及管理条件不同,空气中的灰尘、油污、酸碱及其气体、盐分、潮气、炭渍、金属尘埃、各种机械杂质等污染物质,不可避免地吸附在电路表面及其它部位,加之静电累积和在电场力的作用下,污秽的累积不断加重和变得牢固,各种污秽牢牢附着在线路表面,深层及各部位。灰尘、油污、酸碱及其气体、盐分、潮气、炭渍、金属尘埃、各种 相似文献