查询词典 dielectric constant

First, we deduce theoretical formulae of calculating equivalent dielectric constant and resonance frequency of rectangular microstrip antennas with air gaps from electromagnetic field theory based on the modified theory of cavity model. Then, we discusses the radiant principle of microstrip antennas on the base of transmission line theory and analyzes the problem of air gaps how to influence pattern and other idiocratic parameters of a microstrip antenna in detail.

本论文的主要工作是根据修改的微带天线的腔模理论，利用电磁场理论推导了具有空气隙的矩形微带天线的等效介电常数和谐振频率的理论计算公式，同时以传输线理论为基础，论述了微带天线的辐射原理。

Based on the theory of radio-freqency impendence, the dielectric constant of water is much greater than that of oil, so they show different properties in the respect of radio impedance.

水的介电常数远大于油的介电常数，因而两者呈现不同的射频阻抗是油品含水量测量的理论依据。

Featured by wide band gap, high breakage electric field, high electron mobility, low dielectric constant, strong irradiation proo...

非晶硅薄膜和SiC薄膜由于其优异的光电特性，在半导体产业中占有重要的地位。

The solvents commonly used in the solvothermal synthesis include alcohols (such as methanol, ethanol, isopropanol, alcohol, ethylene glycol, glycerine, etc.), amines (such as hexamethylenediamine, dimethylformamide, triethanolamine), Acetonitrile and Propionitrile, the differences of functional groups, varieties of kinds together with a wide differences of polarity, dielectric constant and boiling point of organic solvents greatly increase the diversities of the product.

溶剂热合成常用的溶剂有醇类(如甲醇、乙醇、异丙醇、正丁醇、乙二醇、甘油等)，胺类(如己二胺、二甲基甲酰胺、乙醇胺)，乙腈和丙腈等，有机溶剂由于带有不同的官能团，种类繁多，具有不同的极性、介电常数、沸点等，大大增加了合成产物的多样性。

According to the preview study, the low dielectric constant will reduce the self-oxidation of the pyrogallic, which lead to the result of the lower self-oxidation rate in vesicles than that in solutions.

根据前面的研究结果，低的介电常数会抑制其自氧化，因此就出现了在囊泡中自氧化速率低于在水溶液中的现象。

The activty of SOD in vesicle solution is then determined. But still no apparent superactivty is found due to the following reasons: 1. The lowered dielectric constant reduces not only the self-oxidation rate of pyrogallic, but also the activity of SOD; 2. There are no efficient enough interaction between vesicles and SOD.

在上述体系中进行的SOD的活性研究中，没有发现表观超活性，估计是两方面的原因：一是囊泡周围低的介电常数同样也降低了SOD酶的活性，二是由于表面活性剂浓度较小，仅为0.5％左右，使得囊泡体积分数较小，不能与SOD酶发生充分有效的结合。

The results obtained form theoretical calculations indicate that the hydroxyl-tautomer predominate in the gas phase or nonpolar solvents, while in solvents of high dielectric constant, the tautomeric equilibria is shift in favor of the oxo-tautomer can be mainly ascribed to the polarization effects.

结果表明，2（1H）-吡啶酮类化合物在极性溶剂中表现出与气相或非极性溶剂中截然不同的的优势结构主要是由于各异构体分子极性上的差异引起的。

In part two, Writer analyses the electric field with catalyst theorically. The results show: The most intensive electric field of pellets in the electric field occurs at the two ends along electric field, and the larger the dielectric constant, the more intensive the electric field.

第二部分，对有催化剂情况下的电场分布进行了较为详细的理论分析，结果表明：电场中的催化剂小球表面沿电场方向两端部场强最强，并且表面场强随催化剂介电常数的增加而增加。

Extraction rate of artemisinin increased obviously with the decrease of dielectric constant of the mixed trichloromethane and dichloromethane, which was opposite to the results of mixed solvent of hexane and cyclohexane.

用正己烷、环己烷以及它们的混合溶剂作溶剂时，青蒿素的提取率随着溶剂的介电常数的增大而增大，而用二氯甲烷、三氯甲烷以及它们的混合溶剂作溶剂时，青蒿素的提取率随溶剂的介电常数的增大而减小。

At pH=10.3, barium oxide is decreased by 92.86%, electric strength increasd by 29.50%, maximal dielectric constant increased 15.41%.

在pH=10.3时，合成的BaTiO3中BaO含量降低了92.86%，电气强度提高了29.50%，介电常数峰值提高了15.41%。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。