介电常数

The angular distribution of the scattering coefficient of the HH polarization is obtained by numerical implementation, the influence of the fractal dimension, the special fundamental frequency, the scale interval, the permittivity of substrate medium, the permittivity and the mean layer thickness of intermediate medium, the root mean square of rough surface, and the frequency of the incident wave on the bistaticscattering coefficient is discussed.

通过数值计算得到了HH极化下双站散射系数随散射角的变化曲线，讨论了分维、空间基频、标度区间、底层介质介电常数、中间介质介电常数和厚度、粗糙面高度起伏均方根及入射波频率对双站散射系数的影响，得到了平面波入射一维带限Weierstrass分形分层介质粗糙面散射系数的分形特征、基本特征、分区特征和随频率变化的特征。

Firstly, the paper makes a detailed study on the dielectrical properties of coal and associated minerals. This paper proves that the dielectric constants of coal and each composition follow cube root addition law.

首先对煤及伴生矿物的介电性质进行了详细研究，根据电动力学理论证明了煤的介电常数与其中各组成部分的介电常数之间满足立方根相加规律。

The results suggest that the model proposed in this study for the porous layer with linearly distributed conductivity and dielectric constant can be expected to apply to other heterogeneous systems as well as membrane systems.

所提出的电导率和介电常数线性分布的多孔层的介电模型，也可用于具有其他电导率、介电常数分布规律的体系。

If a capacitance system consists of the measured pressboard and a capacitive sensor,the outputs of the system are effected by dielectric characters of measured pressboard.

如果将被测绝缘纸板和测量传感器看成一个电容系统，则绝缘纸板的介电性能直接影响系统的输出，而绝缘纸板的复介电常数又是其内部微量水分的函数，通过测量绝缘纸板的复介电常数，根据水分及温度对其的影响关系可以判断被测绝缘纸板的水分含量。

Complex permittivity includes abundant information, since its real part is the dielectric constant, and the imaginary part is proportional to conductivity.

复介电常数包含了丰富的信息，其实部即为介电率，虚部与导电率成比例；并且介电常数与很多生理参数有关，例如温度、含水量、血量、血氧浓度等。

The main content includes:B-Site , and substitutions greatly decrease the dielectric losses ofO3 system ceramics under electric field; because of the different characteristics of different ions and the influence of pyrochlore phase created in system, B-Site and ion substitutions increase the dielectric constant of the system, whereas ion substitutions decrease the dielectric constant of the system.

论文的主要研究内容包括：B位，及的取代均大大降低了O3体系陶瓷在电场下的介电损耗；由于各离子特性的不同及体系中生成的焦绿石相的影响，B位，离子的取代使得体系的介电常数上升，离子的取代却使的体系的介电常数有所下降。

Comparing with oxygen plasma treatment, the process has little impact on MSZ film, and has little change in the dielectric constant and leakage current. On the reliability, the electrical properties of supercritical CO2 fluid process are better than that of O2 plasma ashing process.

相对於氧电浆处理，本制程对低介电常数材料的影响较小，具有较小的介电常数和漏电流的改变，在可靠度上超临界二氧化碳流体制程更是在电性上明显优於氧电浆处理。

The existence ofpolar nanoregions dramatically influences the extrinsic dielectric nonlinearityof paraelectric phase. 5 Slow relaxations of field induced piezoelectricresonance of paraelectric barium stannate titanate were observed after eitherapplying or removing a DC bias field. This phenomenon is attributed to slowspace charge dipoles formed by injected homocharges and validated by theobservation of a negative piezoelectric constant. Isothermal study ondielectric constant and discharging current after application or removal of astep field were performed. The relaxation laws in ferroelectric andparaelectric phases are different. The transportation of homocharges arebelieved to be responsible for the strong relaxation behavior in paraelectricphase. Domain wall can trap space charges thus the relaxation in ferroelectricphase is relatively weak. Abnormal phenomena, such as slim-waisted hysteresisloops, abnormal C-V curves and clockwise reversible hysteresis loops observedin barium stannate titanate ceramics, were attributed to pinning of gatheredpoint defect on domain walls.

5研究了直流电场施加和撤除引起的钛锡酸钡顺电相场诱压电谐振慢弛豫现象，认为这是同极性空间电荷注入形成空间电荷慢偶极子导致的，观察到的负压电常数证实了这个观点；研究了等温条件下阶跃电压作用下介电常数和放电电流的慢弛豫现象，发现钛锡酸钡陶瓷的铁电相和顺电相呈现不同的宏观性能时间依赖规律，认为是同极性空间电荷的输运过程导致了顺电相样品呈现强的弛豫行为，铁电相中存在畴壁捕获空间电荷的机制因而其弛豫行为较弱；研究了钛锡酸钡陶瓷中束腰电滞回线、反常 C-V 曲线和顺时针可逆电滞回线等反常现象，将其归因于点缺陷的聚集对铁电畴畴壁的钉扎作用，多次电场循环有助于解除这种钉扎状态，减弱反常特征。

Curing kinetics of epoxy resin and the effects of different compositions on curing reaction were researched by using the differential scanning calorimeters. Relationship between curing temperature and curing converting rate had been studied. Curing conditions for the system were determined. Modified nano-Al2O3/epoxy resin and core shell/epoxy resin composites were prepared by means of blending method. The influence of the composition on the properties was discussed. The thermal and dielectric properties of these composites were investigated using differential scanning calorimetry, Thermogravimetry and dielectric analyzer.

首先，论文通过差示量热扫描仪分析研究了环氧树脂与酸酐固化体系的固化反应动力学及固化工艺；然后，通过共混法和超声分散法制备了一系列纳米氧化铝/环氧树脂及核壳粒子/环氧树脂两相复合材料；进而通过DSC及热重分析仪测试了复合材料的玻璃化温度、热降解温度等热学性能，并采用介电分析仪测试分析了复合材料的介电常数、介电损耗等介电性能，讨论了组成对复合材料的热学性能及介电性能的影响。

When above Curie temperature, crystal lattice occurs at the high-resistance layer and the ferroelectric constant decreases quickly. The potential barrier increases because the dielectric constant drops in accordance with the Curie-Weiss Law.

但在居里温度以上时，高阻层发生晶格转变，铁电性消失，介电常数急剧减小，由于介电常数按居里-外斯定律下降，所以势垒随之升高。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。