介电常数

For imaging oil/water two-phase flow with noticeable difference between permittivities in pipelines, an image reconstruction model based on BP neural networks was proposed.

针对介电常数差异显著的油水两相管流，提出了基于BP网络的ECT图象重建法，并对相应的图象重建模型进行了仿真实验测试。

The measurements and simulations are performed in real labs. Before the simulations, the size, structures and layout of labs are determined, specially, including the permittivities of materials in labs.

在实际实验室内进行仿真和测量，仿真前对实验室房间的尺寸、结构、内部布局都进行了认真的测定，特别是对每种物体在仿真频率上的介电常数进行了认真的测定。

Relationship between the measured capacitances and the permittivities of the porous media was derived by an appropriate simplification. A three-point calibration method was presented.

该文针对通道型多孔介质的结构，经适当简化，导出了测量电容与被测物质介电常数的标定关系式，根据该关系式提出一种三点标定法。

Dielectric cylinders of unknown permittivities are buried in one space and scatter a group of unrelated waves incident from another space where the scattered field is recorded.

设一未知的不均匀双轴性介质复杂物体掩埋在其中一空间中(不论是在半空间或三层空间中)，吾人可在另外的空间中适当的安排一组具有不同入射和极化方向的无关联波照射物体并量测在此之散射场，利用简单的矩阵运算，我们就可以克服非线性和不良情况的发生的困扰，进而重建双轴性复杂物体的介电常数分布。

The approximate calculating method is proposed for the low loss and thin flake material perturbation outside of the cavity. The measured complex permittivities of teflon,polyvinyl chloride ,pure ceramic flake are in good agreements with the standard data.

在隙缝辐射较小的条件下，提出适于损耗小，厚度薄(1mm左右)的片状材料腔外微扰的近似计算方法，测得聚四氟乙烯、聚氯乙烯、纯陶瓷片等复介电常数与准确值相当吻合的结果。

The samples have lower permittivities by adding MgO before Ba0.6Sr0.4TiO3 powder be pre-synthesized, but have higher tunabilities and lower high frequency losses by adding MgO after Ba0.6Sr0.4TiO3 powder be pre-synthesized. The tunabilities of the samples prepared by adding 15%~25% MgO after Ba0.6Sr0.4TiO3 powder be pre-synthesized are all higher than 20% at 103 V/mm.

MgO添加量相同时，在预合成BSTO前加入，样品的介电常数较低；在预合成BSTO后加入，样品的高频损耗较小，可调性较高，当添加质量分数为15%~25%的MgO，样品在10^3V/mm电场强度下的可调性均高于20%。

The article considers that the magnetic material layer of MPCs is bismuth-substituted yttrium iron garnet which is ferromagnetic material, and the isotropic material layers are GGG, GaAs, SiO2, etc. Those materials have different relative permittivities.

文中所模拟的磁性光子晶体，其主要磁性层为亚铁磁性材料的渗入铋之钇铁石镏石(Yttrium Iron Garnet， YIG，)，而等向性介质则采用、GaAs等材料，其分别具有不同的相对介电常数。

By sandwiching a layer of Teflon between the silicon wafer and the ground plane, the novel micromachined shortened stacked patch antenna printed on high index wafer has superior performance over those of traditional design, while its bandwidth has been increased by as much as 8.6%, and its length of patch has been miniaturized to only an eighth wavelength.

本文提出了一种在高介电常数上用微机械工艺制作的短接层叠式贴片天线，该天线在硅片和接地板间夹一层Te flon ，这样天线的性能得到了提升，相对带宽增加到 8.6 %，而几何尺寸仅为波长的 1 8。

By sandwiching a layer of Teflon between the silicon wafer and the ground plane, the novel mi-cromachined shortened stacked patch antenna printed on high-index wafer has superior performance o-ver those of traditional design, while its bandwidth has been increased by as much as 8.6 ％, and itslength of patch has been miniaturized to only an eighth wavelength.

传统的半波天线尺寸较大，在小型通信设备中使用会出现许多问题。本文提出了一种在高介电常数上用微机械工艺制作的短接层叠式贴片天线，该天线在硅片和接地板间夹一层Tef-lon，这样天线的性能得到了提升，相对带宽增加到8.6％，而几何尺寸仅为波长的1/8。

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%。

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。