共查询到20条相似文献,搜索用时 174 毫秒
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寇秉成 《光纤与电缆及其应用技术》1985,(6)
一、序言连接器作为电子设备能量和信号传输线路的一部分,它对电磁干扰特别敏感。外部干扰可能会渗透进连接器而在触点上感应出电流和电压;反之,连接器触点的射频能量可能泄漏出而干扰邻近的设备。再则,制造连接器的表 相似文献
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评价同轴连接器镀金层质量需检测连接器触点表面镀金层的抗磨损能力,以防止镀金层磨穿后基底非贵金属材料暴露,在连接器长期使用中发生腐蚀,而造成电接触失效.连接器触点表面硬度、磨损前后镀金层厚度变化可以作为连接器镀金层抗磨损能力的参考数据.使用潮湿二氧化硫单一气体加速腐蚀,并配以光学显微镜、扫描电子显微镜检测镀金层磨穿的特征点,是检测同轴连接器镀金层抗磨损能力的一种较好的方法. 相似文献
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《电子产品世界》2006,(4):42-45
AmphenolIndustrialOperations无磁多芯连接器AmphenolIndustrialOperations推出改进型Amphe-Lite系列连接器,符合面向MRI或其他要求使用无磁互连的应用的无磁规范。这些连接器壳体采用耐腐蚀复合材料制成,可实现IP67等级的轻型接合。可为电源、信号和同轴应用提供非磁触点,从单个Twinax触点到128个22D号触点,可在大量嵌入组合中压接22AWG到28AWG的导线。标准压接触点用于端接离散导线,PC尾触点用于端接印刷电路板或柔性电路。该系列符合UL和RoHS要求。每对起价20美元。AriesElectronics公司μBGA器件DIP适配器AriesElectro… 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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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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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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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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水的光学特性对光学成像质量有着重要的影响,水对光的吸收、散射作用可造成光在水介质传播中的衰减,本文就水的光学特性及其对水下光学成像质量的影响进行了分析,以为成像系统在水下的应用提供基础的理论依据。 相似文献