查询词典 electric current

From the formula for the field strength of a point charge,by means of the transformation of the field strength tensor in the special theory of relativity,the laws of electrostatic field and magnetic field of steady current s are derived in this paper to give the students a better understanding of the consistency of electric field and magnetic field.

从点电荷的场强公式出发，根据狭义相对论中场强张量的变换，推导出了静电场和稳恒电流磁场的诸定律，使学生对电场和磁场的统一性有了更为深刻的认识。

Furthermore, the at least one elongated structure (120) further comprises an electrode arrangement (190) for applying an electric field to the at least one elongated structure (120) for causing bending of its bandgap characteristic for modulating a wavelength of the light radiation emitted in operation from the at least one structure (120) in response to the current flow therethrough.

而且，该至少一个细长结构(120)还包括电极排列(190)，该电极布置用于将电场施加到至少一个细长结构(120)，用于引起其带隙特性的弯曲，用于响应流过其的电流来调整运行中从至少一个结构(120)发出的光的波长。

In order to investigate the distribution of underground thermal water of the hot spring, we used the direct current prospecting to determine the fracture belt bearing underground thermal water with the near source field electric profiling.

从而确定了开发地下热水的钻孔位置，为当地政府开发利用地热能提供了必要的资料。

It shows that the thermionic emission current can be influenced by the temperature, the work function, the diameter of the surplus RE particleand the electric field. The "nanometer particles" theory modification concentrates mainly on two parts. First, the active layer was described.

对"纳米微粒子"发射模型进行两方面的完善：其一、描述了表面活性物质层是非连续的薄膜；其二、当稀土氧化物晶体中的氧缺位浓度超过临界值的时候，即开始有纳米稀土粒子的形成和生长。

This topic take the thermoelectricity boiler control system as the research object, according to current collection control system development direction and form, design development network distributional DCS hot electric stove process examination and control system .

本课题以热电锅炉控制系统为研究对象，根据当前集散控制系统的发展方向与形式，设计开发网络化分布式DCS热电炉过程检测及控制系统。

Therefore, before an electric service is started, the line must be charged with electricity. The necessary current may be carried in a third rail, just outside one of the normal rails.

因此，在供电前，必须安装好电线，或者，电流可以通在第三根铁轨里，它位于某一条普通铁轨的外侧。

Uses the 89S51 monolithic integrated circuit to take the system the control core, the crystal thyratron zero has triggered the way realization alternating current supply the soft start, finally uses the multi-purpose board to build the overall system electric circuit.

采用89S51单片机作为系统的控制核心，晶闸管的过零触发方式实现交流电源的软启动，最终采用万用板来搭建整个系统电路。

Korea put the company at electric power control device - the general type STR (thyratron thyristor power controller) CPU upgrade to system memory type, and early in 2003 to develop cutting-edge new product type constant current, constant voltage type collectively referred to as STR (may silicon-controlled thyristor power controller) the inherent brand. In 2000 to develop the motor starting device - soft starter motor new products and the inherent SMC brand available at the area of power control both at home and abroad alike. Market in 2000 and 2002 patent SSC (packaged solid-state thyratron power controller), as well as sales from the company since its inception back filter with Pulse Timer and other products in the same trade firmly occupy The largest market. Also in 2002 the development of the supply of silicon wafer characterization equipment and sub-Plasma Ion Plating with the most cutting-edge power supply devices and so on, so if the company has high-speed development.

本公司在韩国把电炉电力控制装置-一般型STR升级为CPU系统内存型，与2003年初新开发的尖端产品恒电流型、恒电压型统称为STR 这一固有品牌。2000年开发电动机启动装置-电动机软启动器新产品并以SMC这一固有品牌面市，在电力控制领域受到国内外的一致好评。2000年面市并2002年取得专利的SSC(封装固态闸流功率控制器)，还有从公司创立初期销售至今的 back filter 用 Pulse Timer等产品在同行业中牢牢占据着最大的市场。2002年又开发供应硅wafer分段定性装备及Plasma Ion Plating用最尖端动力供应装置等，因此公司具备了高速发展的依据。

The use of temperature control through the transformation of the main pressure control for variable frequency control Shop for closed-loop motor pumps, water pumps, electric power saving rate of the average at more than 30%; 90KW chilled water pump motor current by adjusting the valve at the changes between the 163-148A, the average section less than 6% of electricity by the transformation of the closed-loop control of VVVF, the saving rate is more than 30%.

通过改造采用温度控制为主，压力控制为铺进行闭环变频控制水泵电机，水泵电机平均节电率都在30％以上；90KW冷冻水泵电机靠调节阀门电流在163—148A之间变化，平均节电不足6％，经闭环控制变频调速改造后，节电率平均也在30％以上。

The mutual inductor of the item is used to test vector differential value of protected circuit of personal electric shock is up to or over leakage operating current, the tripper will act and cut off so that the item will take effect of protection.

该项目的互感器用来检测值向量微分电路保护个人触电由以上运行泄漏电流旅行者的行为将被切断，使项目生效的保障。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。