介

The studies ondielectric relaxation, dielectric nonlinearity and electrically tunablemechanism on barium stannate titanate ferroelectric ceramics are of bothacademic and practical importance.

以钛锡酸钡陶瓷为研究对象，开展铁电陶瓷的介电弛豫、介电非线性以及电场可调机理的研究具有重要的学术意义和应用价值。

A basic review on dielectric nonlinearity and electric tunable mechanism was performed in view of thermodynamics, ferroelectric domain, polar nanoregion, field induced phase transition, grain boundary layer and AC dielectric nonlinearity. The dielectric nonlinearity phenomena in barium stannate titanate ceramics were studied and the field dependences of dielectric constant and loss tangent were showed.

关于低温介电弛豫行为与极性微区关系的讨论涉及到了弛豫铁电体与扩散相变铁电体之间的相容关系，作者认为所有的扩散相变铁电体都应该是弛豫铁电体或潜在的弛豫铁电体，它们的区别仅在于能够观测到介电弛豫现象的测试频率范围不同。

To improve the dielectric performance of the syntactic foam ,a kind of a low density dielectric materisl with high dielectric comstant.

为改善复合泡沫塑料的介电性能，采用金属氧化物粒子填充改性双马来酰亚胺空芯玻璃微球复合泡沫塑料得到了高介电常数、低介质损耗因数、低密度、力学性能良好的电介质材料。

Incipient ferroelectrics or quantum paraelectrics constitutes a very unique subject of current interest due to its high value of dielectric constant , low dielectric losses and high degree of tenability by the external electric field and temperature .

等由于其高介电常数，低介电损耗，对外场和温度高度的可调协性等独特的性质和应用价值一直是一类人们广泛研究的晶体材料。

Both of the developed ABCs verified by examples can be used to truncate FDTD lattices of lossy media.

通过在Gedney PML中引入各向同性的复介电常数和复磁导率，并给张量介电常数、张量磁导率增加衰减因子。

Methods: Serum sICAM-1, IL-15 and monocyte ADCC of 66 Spleen-Deficiency patients were determined by enzyme-linked immunosorbent assay and modified thiazole blue test.

采用酶联免疫吸附法和改良噻唑蓝法对66例脾虚患者血清sICAM-1和白细胞介素-15(IL-15)及单核细胞抗体依赖性细胞介导的细胞毒反应进行检测。

However, mobility degradation and threshold voltage instability are the mainly concern.

然而，在高介电常数的介电质中所产生的迁移率衰减与临界电压的不稳定都是其主要的存在问题。

Dr. Tilson added that physicians may not be identifying children at moderate risk for diabetes."Physicians see so many kids that have BMIs off the chart — greater than the 95th percentile — so when we see kids with BMIs between the 85th and 95th percentile, we've been desensitized to referring them," she told Medscape.

Tilson医师附带表示，医师可能无法确认出糖尿病风险不高的儿童；她向Medscape表示，医师看到许多儿童的BMI过高，高於前95%，所以当我们看到儿童的BMI介於前85%至95%时，我们对於转介这些儿童并没有那麼敏感。

If a child had one or more risk factors present in addition to a BMI higher than the 85th percentile, he or she was referred for a fasting blood glucose test and an oral glucose tolerance test. Any child with a BMI higher than the 95th percentile was referred for a fasting blood glucose and a glucose tolerance test, even if no other risk factors were present because a BMI in this percentile is a strong risk factor for prediabetes or diabetes, Dr. Tilson said.

Tilson医师表示，如果该儿童除了BMI高於前85%之外还有一个以上的危险因子，这些儿童被转介接受空腹血糖或是口服葡萄糖测试；如果该儿童BMI高於前95%，则不论是否有危险因子都被转介接受空腹血糖或是口服葡萄糖测试，因为过高的BMI本身就是糖尿病前症或是糖尿病的危险因子。

Based on the recent progress in the field of mesoporous materials, the synthesis of mesoporous titania with crystalline walls was investigated in this paper.

在调研了国内外介孔材料研究领域的最新进展后，将合成具有晶型孔壁结构的介孔二氧化钛作为本论文的研究内容。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。