查询词典 resistivity

Because of the very low resistivity of metallic layered barium lead oxide , in this work, BaPbO3 or BP ( Pb3O4+ BaCO3) was added into barium titanate-based PTCR to reduced its resistivity at room temperature.

实验通过四种铅酸钡的加入方式，探讨在BaTiO3 中复合铅酸钡的最佳途径。

Geophysical method displays two information models:① high resistivity, high polarization, low K, relative low magnetism and low total counts, which correspond to silicic alterative zones;② low resistivity, low polarization, high K, relative high magnetism and high total counts, which correspond to quartz porphyry intrusive body.

地球物理测量结果显示两种信息模式：①高阻、高极化、相对低磁、低K和低总计数率在空间上对应硅化蚀变带地段；②低阻、低极化、相对高磁、高K和高总计数率对应于石英斑岩侵入体地段。

Reservoir bed is distinguished by providing the information about resistivity of formations using Electromagnetic Propagated Resistivity Logging method with several mega-hertz operation frequency. The information of dielectric constant of invaded zone is provided using Ultrahigh-frequency Electromagnetic Wave Logging method with above 200 mega-hertz operation frequency, which has no enough radial investigation depth but has a good vertical resolution.

几兆赫兹电磁波传播电阻率测井通过提取地层电阻率的信息来判别油层，以SPPRRYSUN公司源频率为2MHz的EWR-3D测井仪为代表。200 MHz以上的超高频电磁波传播测井具有很高的垂向分辨率，但探测深度太浅，基本上只能反映侵入带介电常数的信息，SCHLUMBERGER公司已推出源频率为1 。1GHz的EPT测井仪。

The surface resistivity and volume resistivity of zinc oxide whiskers were decreased by means of new aluminium-doping method.

采用新的铝掺杂力法，降低了氧化锌晶须的本体电阻率；研究了铝掺杂对氧化锌晶须电阻率的影响。

The effects of content of PAS in the composite on volume resistivity and surface resistivity were discussed in detail.

实验结果表明，所制备复合材料的渗流转变发生在纳米聚并苯质量分数为16.7%-28.6%范围内，当纳米聚并苯含量为28.6%时，体积电阻率下降至2.09×107 Ω·cm。

Humidity greatly affects the results of surface resistivity measurements and, to a lesser degree, volume resistivity measurements, as well.

湿度对表面电阻率测量有重大的影响，对体电阻率的测量也有影响，只是其程度要小一些。

However, because of ultra-high bulk resistivity and surface resistivity of PE and PP materials, the articles made of PP or PE have notorious static problem.

由于PE和PP具有极高的体积电阻率和表面电阻率而导致静电荷的积累，因此在使用中经常发生静电危害。

With this method the copper plating graphite powder was made up in 50% copper content .The silver- copper plating graphite composite was prepared while the silver- copper-graphite composite and the silver-graphite composite were also made up together .The mechanical and electric characteristics of the three kinds of composites were tested and it was found that the copper plating graphite powder can only optimize the properties of the silver matrix composite under the high content of the graphite ,the conductivity and the mechanical property was improved and the material could take higher current in the same carbon content .At 20% carbon content, the resistivity of Ag-graphite composite was 1.67 times as high as that of silver- copper plating graphite composite, the resistivity of Ag-Cu-graphite composite was 3.23 times as high as that of silver- copper plating graphite composite. The bending strength of silver-copper plating graphite composite was 2.17 times as high as that of silver- copper-graphite composite, and the bending strength was 2.11 times as high as that of silver- copper-graphite composite. The wearability of silver- copper plating graphite composite was also enhanced greatly at high carbon content.

利用该方法制备了50%铜含量的镀铜石墨粉，然后进一步制备了一系列相同碳含量的银-石墨复合材料、银-铜-石墨复合材料、银-镀铜石墨复合材料，对三种材料的机械、电气性能进行了综合对比，发现在低碳含量时镀铜石墨粉不能改善复合材料的上述主要性能，而在中高碳含量时则能明显优化复合材料的整体性能，提高了复合材料的电导率，使复合材料在中高碳含量时既具有较高的耐磨性同时也能负载较大的电流，复合材料的机械性能也因镀铜石墨粉的加入而大幅提高，20%碳含量时，银-石墨复合材料的电阻率是银-镀铜石墨复合材料的1.67倍，银-铜-石墨复合材料的电阻率为银-镀铜石墨复合材料的3.23倍，银-镀铜石墨复合材料抗弯强度是银-铜-石墨复合材料的2.17倍，是银-石墨复合材料的2.11倍，同时，在实验给定的条件下，中高碳含量时银-镀铜石墨复合材料的机械磨损耐磨性和通电磨损耐磨性都得以显著提高，银-镀铜石墨复合材料在实验时的接触电压降也更为稳定。

Electric methods include resistivity profiling, resistivity sounding,"mise-a-la-masse" method, induced polarization method and self-potential method.

在每一大类中，又有一系列的方法，例如直流电法中就包括电阻率剖面法，电阻率测深，充电法，激发极化法和自然电位法等

The results show that with the content of the synthetic compound increasing, the surface resistivity of PVC materials was decreased. When the content of the synthetic compound reached 4.5%, the surface resistivity of PVC materials was reduced below 3.0×108 ?.

结果表明：随合成长链季铵盐的添加量增大，PVC材料的表面电阻率降低，较小的添加量(4.5%)即可使材料的表面电阻率降低至3.0×108 Ω以下，达到了煤矿行业对高分子材料抗静电性能的要求。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。