共查询到20条相似文献,搜索用时 62 毫秒
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文章对建筑物外墙产生污垢的原因及污垢种类、使用的清洗剂种类及其性能特点进行了介绍,并重点对铝材和石材的清洗做了详细描述。 相似文献
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文章对建筑物外墙产生污垢的原因及其种类、使用的清洗剂种类及其性能特点进行了介绍,并重点对铝材和石材的清洗做了具体介绍。 相似文献
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为适应高层建筑物外墙清洗技术在我国迅速发展的形势特编写此文,文章主要介绍了高层建筑物外墙清洗的设备和方法。针对建筑物污垢的成分、结构,附着方式和外墙材料理化性质及结构,指出清洗剂一般采用表面活性剂和助剂配成的水基洗济剂。并详细介绍了具体的清洗剂配方。 相似文献
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在“后非典时期”,一些用专业工具,清洗剂结合专业技术针对空调的冷凝器.蒸发器的散热片进行清洗的专业队伍应运而生。据了解,空调应每年清洗保养1-2次,因为空调在工作时抽进空气,过滤网和散热片上会耙聚大量灰尘、污垢、胺、碱、病毒等有害物质.空调停机后,温度恢复会使螨虫、细菌繁殖、霉变,并产生异味.易引发呼吸道疾病、皮肤病和非典的传播等,对人体 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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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