查询词典 shielding constant

The relations of inducing skin current of shielding layer, core voltage and core current with the environment field were obtained. The change of shield layer current wave with grounding state of external shield and core voltage with loading resistance was analyzed. According to the dependence of shield layer current oscillating frequency on electromagnetic wave propagation velocity, conception of transporting line of shield layer-ground with equivalent relative dielectric constant was presented. fited equation of equivalent relative dielectric constant with change of cable height was given.

试验得到九芯电缆屏蔽层感应电流、芯线感应电压、芯线感应电流以及环境场之间的关系；分析了皮电流波形随外皮接地状态的变化，芯电压随负载电阻的变化；基于皮电流振荡频率与电磁波传播速度的关系，提出了屏蔽层-大地"传输线"等效相对介电常数概念，给出了等效相对介电常数随电缆高度变化的拟合式；皮电流计算与测量结果在波形、振荡周期、衰减规律等方面有较好的一致性。

MethodsUnder the conditions of constant temperature, constant humidity, auto-light and electromagnetic shielding, we gave experimental rats suanzaoren decoction at different doses and adopted chronicity electrode embedment technology to trace the EEG of hypodermal layer of freerunning rats , which rececived electric stimulation.

方法在恒温、恒湿、自动光控及电磁屏蔽条件下，给予实验动物不同剂量酸枣仁汤，采用慢性电极埋植技术描记电刺激所致失眠大鼠自由活动情况下的皮层脑电图。

Where is a screening or shielding constant for the various classes of protonic nuclei present within the molecule , and n assumes integer values of one or greater.

如果是一个不断筛选或屏蔽的各种类别的质子核本的分子，和N假设整数值的一个或更多。

Production of the Product has: Programmable constant temperature and humidity box, low-temperature chamber, oven, heat aging test chamber, salt spray test machine, drop test machine, tensile testing machine, testing machine with the current swing, elongation test machines, filling magnetic machines, shielding Net room, wave soldering, reflow, assembly line, such as environment, quality inspection equipment and production equipment, while custom-made a variety of unconventional instruments.

生产部的产品有：可程式恒温恒湿箱、低温试验箱、烤箱、热老化试验箱、盐雾试验机、跌落试验机，拉力试验机、带电流摇摆试验机、伸长力测试机、充磁机、屏蔽网房、波峰焊、回流焊、流水线等环境、质检仪器和生产设备，同时定做各种非常规仪器。

Performed tests based on seven kinds of important structural parameters which were wall thickness, shielding thickness, the radial wall shielding insertion depth, the width of the radial electrode, the electrode width, the relative dielectric constant of wall material and filler shield relative dielectric constant, and studied on structural parameters and the corresponding performances by RBF neural network, the optimization based on PSO was performed with the regression model.

该方法以敏感场整体灵敏度大小等系统性能为优化目标，基于管壁厚度、屏蔽层厚度、径向屏蔽插入管壁深度、径向电极宽度、电极宽度、管壁材料的相对介电常数、屏蔽层填充物相对介电常数7种重要的结构参数进行试验。应用RBF神经网络对多组结构参数以及对应的系统性能指标进行学习，得到回归模型，并应用粒子群算法进行寻优。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。