常数层

In this thesis, CAD formulas are obtained by synthetic asymptote for three structures, First, we obtain the simple CAD formulas of a microstrip line on two-layer substrate with loss

采用"合成渐近"法，本文首先推导出两层有耗介质上的微带线单位长度电容的CAD公式，从而可以计算出微带线特征阻抗和传播常数

Based on the characteristic equation of THz electromagnetic wave in metallic hollow waveguide, the dependence of the transformation attenuation and phase constant on the frequency of THz wave, inner radius of the waveguide and conductance of the metal material using Newton-Raphson iterative method.

从其传输的特性方程出发，利用Newton-Raphson迭代方法数值模拟了传输损耗和相位常数随太赫兹波频率、波导内径以及波导中金属镀层的电导率变化关系。

As an assembled nanostructure, nanoelectrode ensembles or arrays present many advantages such as enhanced mass transport, lower double layer charging current, short time constant, lower electrolyte voltage drop, higher ratio of signal to noise, as well as good maneuverability, with high sensitivity and reliability in electroanalysis. Therefore, they have found broad applications in a variety fields including the study of electrochemical theory, biosensor, electrocatalysis and electrode materials in high energy chemical batteries.

纳米阵列电极作为一种人工组装的纳米结构体系，具有高传质速率、低双电层充电电流、小时间常数、小IR降及高信噪比、可操作性强和测量灵敏度高等优势，因而在电化学理论研究、生物传感器、电催化材料和高能化学电源电极材料等方面具有广阔的应用前景。

The influence of local stiffness degression resulted from damage in the impact process is simulated by modifying the material constants of damaged layers.

另外，分类考虑了不同的损伤形式，通过修正损伤层的材料常数来模拟单层板损伤所造成的局部刚度下降对压痕过程的影响。

The partially resonant condition is related to the dielectric constants of the core and the shell and the depolarization factor.

椭球部分共振条件与核内及壳层的介电常数以及椭球形状因子有关。

Besides, A new method based on the AES depth profile and line shape analysis was developed in this thesis.

增加Pt层后，PZT薄膜的介电常数高达620，与体相PZT的介电性能相近（590）。

The deuterium desorption behavior of titanium deuteride with oxide layer on the surface in a constant volume system was investigated in the temperature range of 873 to

测定了3种不同氧化层厚度的氘化钛在873～1073K范围内的热解吸反应速率常数，得到673K下氧化5、2h的氘化钛和未经氧化处理的氘化钛热解吸氘的活化能分别为29。

An oxide coating is formed on the surface of the aluminum powder after the surface passivation treatment, so as to efficiently avoid the formation of leakage conductance due to mutual contact between eclectically-conducting additives and thereby to reduce the dielectric loss of the material. The composite material has high dielectric constant, low density and good flexibility. The production method of the composite material has the advantages of simple and controllable process, low hot-pressing temperature, energy conservation and environmental protection.

铝粉经过钝化处理，表面形成一层氧化物包覆层，有效地避免了导电添料因相互接触而形成漏电导，降低了材料的介电损耗；复合材料介电常数高，密度低，加工简单，并具有良好的柔韧性；复合材料的制备方法工艺易控简单、热压温度低、节能环保。

Non-uniform layer about 90 kilometers or more, because of the photochemical decomposition of oxygen molecules, as well as the proliferation of the role of gravity, so that the volume percentage of atmospheric composition varies with height, average molecular weight is no longer a constant, which is non-uniform layer.

非均匀层约90公里以上，由于氧分子的光化分解，以及重力扩散作用，使大气成分的体积百分比随高度而变，平均分子量不再是常数，即为非均匀层。

On CHE programming, the higher coupling ratio of control-gate makes the higher electrical field across TOX in Si than Ge. Also because of the continuity of displacement vector, the higher permittivity of Ge would cause the lower electrical field at interface. We get the higher gate current in Si than Ge. On CFN programming, the higher CT in Ge would show the higher electrical field across TOX. However, the parameters of F-N tunneling are calculated and showing the gate current in Si is larger than Ge. On the same mechanism of F-N tunneling erasing, the parameters also show the higher electrical filed of Si would cause the higher erasing speed. The continuity of displacement vector also explains the higher electrical field at interface for F-N tunneling programming/erasing.

从通道热电子穿隧写入的模拟结果发现，由於控制闸极耦合电容的影响，加上电位移向量在半导体-氧化层界面连续的观念，拥有较高介电常数的锗反而得到较小的等效电场，决定了穿隧电流反倒是不如矽基板；在F-N穿隧写入的模拟中，即便锗基板拥有较大的总耦合电容，使得在浮闸的耦合电压大於矽基板，但仍旧是半导体-氧化层界面的电场扮演了穿隧电流的决定性因素，得到的结果仍旧是矽基板的写入速度高於锗基板；在F-N抹除的模拟中，运用与F-N写入相同的数学模型，仍旧看见在锗基板上未能得到速度上的改善，同时用数学的计算展示了合理的解释。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。