共查询到20条相似文献,搜索用时 62 毫秒
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首先,我代表《电信技术》杂志社的全体人员向应邀出席今天(2004.10.26)会议的各位领导、各位作者和读者、各位来宾和朋友们表示热烈的欢迎和衷心的感谢。《电信技术》创刊于1954年。今天,在我国通信事业取得举世瞩目的成就,通信事业跃居世界前列之际,迎来了她50岁的生日,我们感到无比的欣慰和自豪。50年来,尤其是近20多年来,在各级领导的关心下,在广大作者、读者和各界朋友的热心指导下,《电信技术》经受住了市场的锤炼和考验,已经成为一本非常有影响、非常有特色、有非常高质量的电信领域的主流媒体;是读者面最广、发行量最大的电信类杂志… 相似文献
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祝《电信技术》越办越好邮电部电信总局局长栾正禧当我们刚刚跨进1994年的时候,《电信技术》杂志迎来了创刊40周年。我作为她的读者、编委会主任委员,在此表示热烈的祝贺!向人民邮电出版社的领导和《电信技术》杂志的全体编辑以及出版、发行工作的同志们表示衷心... 相似文献
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首先,我代表《电信技术》杂志社的全体人员向应邀出席今天(2004.10.26)会议的各位领导、各位作和读、各位来宾和朋友们表示热烈的欢迎和衷心的感谢。 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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Moshrefzadeh R.S. Radcliffe M.D. Lee T.C. Mohapatra S.K. 《Lightwave Technology, Journal of》1992,10(4):420-425
The temperature dependence of refractive index of polymer films was determined for a number of slab waveguides by a grating coupling method. This dependence was examined as a function of parameters such as molecular weight and glass transition temperature of the polymer. Temperature-induced changes in N TE-N TM , N being the effective index, were studied systematically for different slab waveguide compositions. It is shown that with proper device design and choice of polymeric materials, thermal effects can be reduced 相似文献
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罗晓羽 《信息技术与标准化》2008,(6):37-39
论述了推进电子行业标准制修订项目计划管理信息化的必要性.并提出了具体措施;详细介绍了电子行业标准制修订项目计划管理数据库的设计思路和实现方法.阐述了对后续工作的几点思考. 相似文献
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对影响镍镀层内应力的因素做了介绍和分析,提出了对收缩应力的一种解释,提供了排除这些因素影响的方法,指出重视镀液的管理是减少各种影响内应力因素的主要办法。 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