共查询到20条相似文献,搜索用时 156 毫秒
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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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研究了温度循环对半导体集成电路气密性的影响,阐述了影响集成电路管壳气密性的各种因素;提出了一种摸底试验的方法;对5种集成电路管壳进行了温度循环试验,并对试验结果进行了分析。就试验的几种外壳来看,至少可以经受1000次温度循环,其气密性仍然满足要求。 相似文献
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P3、P4级生物安全实验室 总被引:4,自引:0,他引:4
介绍了生物安全实验室的重要性和级别划分,着重比较P3、P4级生物安全实验室的各种安全措施及一、二级屏障,并就中国相关标准中的一些条款进行探讨。 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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生物安全实验室,有时也称之为生物安全洁净室,是进行微生物和生物医学等研究和生物技术开发必不可少的特殊实验室建筑,广泛应用于生物病毒研究、生物技术开发、遗传基因工程、特殊医疗手术病房、生化武器反恐等多个方面。最近几年,特别是“非典”疫情发生之后,很多单位都将建设生物安全实验室。由于生物安全实验室的专业性强,加上我国相关的规范标准一直不完善,在生物安全实验室 相似文献
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The article describes a model representation of radar probing data in form of a mixture of background and target samples, which is the sum of two random variables with very different parameters. For model development we research the behavior of the central moments of the distribution mix without assuming the distribution law form. An example it is described the detection of the signal at the output of compression system of chirp ionosonde. 相似文献
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解决IP网QoS问题是目前通信领域的研究热点之一.虽然研究已经取得了一定的进展,但人们对于IP 网QoS本身的含义及相关的问题还有着不同的理解.本文将从IP网QoS的定义入手讨论相关的一些问题以及解决IP网QoS问题所做的各种努力. 相似文献
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《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1968,56(6):1024-1032
Assuming that visual responses are due to the action of particles on the membrane of the visual cells, the stochastic variability of the response should be a function of the number of particles producing it. Quantitative predictions can be made with the aid of a model proposed in previous articles. It is found that responses produced in visual cells of Limulus by absorption of a single photon have the stochastic properties which would be expected if the response to one photon were brought about by 25 particles. It is concluded from this that the processes leading to visual responses produce multiplication of particles. The effects of temperature and of metabolic poisons suggest that these processes are of chemical nature. 相似文献
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By means of exact conformal mapping method we have defined character of dependence of squares amounts of angular part of film
element on angled part dimension. We propose relations, approximating obtained dependence. Calculation results and experimental
researches of large-scale models are represented. 相似文献
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A. M. Emel’yanov 《Semiconductors》2010,44(9):1134-1139
A method for analyzing the luminescence spectra of semiconductors is suggested. The method is based on differentiation of
the spectra. The potentialities of the method are demonstrated for luminescence in the region of the fundamental absorption
edge of Si and SiGe alloy single crystals. The method is superior in accuracy to previously known luminescence methods of
determining the band gap of indirect-gap semiconductors and practically insensitive to different conditions of outputting
radiation from the sample. 相似文献
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“计算机组成原理”设计性实践教学模式研究 总被引:1,自引:0,他引:1
本文阐述了"计算机组成原理"设计性实验教学的重要性,对设计性实验教学的目的和基本特征进行了归纳,对"计算机组成原理"设计性实验教学的现状进行了调查,对存在的问题进行了较深入的分析;在此基础上.对组成原理设计性实验的教学模式进行了研究,对设计性实验的体系进行了初步设计,并对"计算机组成原理"设计性实验的实施方法进行了探讨. 相似文献