查询词典 electric current

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。

The selective harmonic compensation based on FFT is proved effective to suppress the harmonic amplification by field operation of shunt APF compensating harmonic current generated by electric load in office building.

经过对办公楼负载的实际并网谐波补偿实验证明基于FFT的有选择谐波补偿方法对于抑制谐波放大是有效的。

Firstly,describes the current status of the self-generation power plants and the impact to electric power supply and demand. Secondly,analysis the ZhengZhou grid company's risk and construct risk measurement modles. Finally,from a fair and impartial perspective, analysises the grid company how to avoid the risk.

首先对郑州地区自备电厂的发展现状及其对供用电的影响进行分析；接着对自备电厂给供电公司带来的风险进行分析，并构建了风险评估模型；最后，从公平、公正的角度，分析供电公司如何规避自备电厂带来的风险。

Based on the current impulse which is used to describe sensitivity of initiating explosive devices,a method for safety design of bridge-wire electric explosive device is put forward.With the method,we can make products to meet the requirement of safety under a certain margin.

本文在用电流冲量表征火工品感度的基础上，提出考虑裕度的桥丝式电火工品安全性设计方法，使新设计的火工品在一定裕度条件下满足安全性的要求。

A Rotary Arc Gap－switch in axial magnetic field is designed and built with high voltage, high current, large charge transfers, slight electrode erosion and long lifetime. The magnetic field, electric field distributions and move mechanism of the arc in axial magnetic field are studied.

为了满足高电压、大电流、高电荷转移量、电极烧蚀小、寿命长的要求，文中设计了一个由轴向磁场控制的旋转电弧间隙开关，研究了其电磁场分布及轴向磁场下电弧的运动机制，并进行了初步实验。

The current production of "Three Parallel Rivers" brand a variety of manual, electric, pneumatic, hydraulic, Pneumatic-hydraulic core pulling rivets gun; ring groove rivet gun; rivet nut gun; all kinds of specification aluminum rivet, stainless steel rivets, ring groove rivet, rivet nuts and thread wire set installation and removal tool.

目前生产&三江&牌各类规格铝铆钉、不锈钢铆钉、环槽铆钉、铆螺母及螺纹丝套安装和拆卸工具；各种手动、电动、气动、液动、气液联动抽芯铆钉枪；环槽铆钉枪；铆螺母枪。门类繁多，规格齐全，生产量大，销售面广。

In all the resistances through which a current flows, electric energy is converted into heat energy.

在电流流过的所有电阻中，电能被转换成了热能。

The distributions and variations of the convection electric field,the region l and region 2 field aligned currents, the ionospheric disturbance current system including the auroral electrojet,and ionospheric conductivity all together compose a self consistent organic whole.

对流电场、一区和二区场向电流、电离层扰动电流系，以及电导率的分布和变化乃是一有机整体，对其每一环节的深入认识均与对整体的全面了解密不可分。

Through the medium of designing and reckoning the electric main connection, designing and counting house supply, counting short-circuit current, selecting and verifying electrical equipment as well as designing switching arrangement, it have accomplished the design of the primary distribution system of the （110KV）substation that have been given.

通过对电气主接线的设计和计算、所用电的设计和计算、短路电流的计算、电气设备的选择和校验以及配电装置的设计，完成了对所给（110KV）变电所的电气一次部分的设计。

Adopting multiplexing technique and making use of communication line between CSC and CS to achieve simultaneous transmission of ISDN signal and electric power. According to the variation of circuit equivalent resistance to design detection circuit, which can judge that the line is short circuit or open circuit and the commercial power is working normally or failure. When the reserve power supply is working, the system judges its operation status by voltage and current detection circuit. Making use of the characteristic of the gas discharge tube to achieve suspension system detection of power line touching. Transmitting information collected up to PC by RS485 for the purpose of centralized monitoring.

采用复用技术，利用基站控制器和基站间的通信线路实现ISDN信号和电力的共同传输；根据线路等效电阻的变化设计探测电路，来判断开路、短路、市电供电、市电停电等情况；在后备电源工作时，通过电压、电流采样电路判断电源的运行情况；利用气体放电管的特性实现悬浮系统动力线搭接的检测；采用RS-485通信方式将采集到的现场信息上传以实现集中监控。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。