查询词典 direct current

Thesis bases on the actual conditions of JDZ PENG FEI building pottery and porcelain, direct towards the current situation,through detailed system investigating, describes the process of designing a set of practicals information management system of backstage supporter for this company.

摘要随着信息技术的不断发展和电子商务的不断普及，医疗对信息管理越来越重视，信息管理系统对于医疗来说已不是什么新鲜事物了，医疗在这方面的资金投入比例也在不断加大。

The article fully introduces the current situation of development and usage of downstream products of DSD Acidg intermediates which are OBA,Direct Dyes,Acid Dyes,and Active Dyes.

DSD酸及合成DSD酸过程中的中间过渡产物NTS酸、DNS酸和DNS酸单还原的产物ANSD酸，这四种化合物统称DSD酸系列中间体，它们是重要的有机化工原料。

To certificate responsibility at our country the current law system descend affirm of concept and property, direct influence judicatory practice medium to"important item fact true false not clear" type litigation press offer as proof a responsibility allotment principle to carry on verdict of reasonable and norm.

对证明责任在我国现行法律体制下概念与性质的认定，直接影响着司法实践中对&要件事实真伪不明&类诉讼按举证责任分配原则进行判决的合理和规范。

The technique problems such as quick charging of high voltage capacitor, uniform discharge in high pressure large aperture zone, uniform flow of high pressure gas, and laser resonator, high energy pulse output and high repetition pulse output, were solved by applications of ultraviolet preionization, two-circuit series and parallel discharge structure of graphite Ernst electrode, folded resonator that embodies super-thin water-cooled non-deforming mirror, closed circle direct cooling system of double loop and high-voltage high-current switch power supply.

采用紫外预电离双路Ernst石墨电极串并联放电结构、超薄水冷不变形镜折叠腔、双回路直冷式封闭循环流动系统和高压大电流快脉冲开关电源等技术，解决了高功率高压电容充电、高气压大体积均匀辉光放电、高气压高速均匀流场、激光谐振腔和高脉冲能量、高重复频率脉冲激光输出等技术难题。

This thesis proposed the design and implementation of an ASIC for the motor control with DTC technology. Note that this ASIC is implemented by cell-based Design style with Verilog language.The basic principle of the Direct Torque Control is to select the switch sequence of the inverter. Those switches will control the magnetism and torque of the stator, to induce a fast response of the induction motor. Furthermore, the d-q axle's static coordinate, which is transferred from both the three-phase current and voltage, is used to compute the stator's magnetism and torque. By comparing with original values, those magnetism and torque will be calculated and set to new data. Then the switching table and the hysteresis controller are decided with the new data to generate a voltage vector and to control the stator magnetism and torque.

直接转矩控制的基本原理为经由侦测马达定子磁通与转子转速，来适当的选择变频器功率电晶体的切换状态，以获得快速且不易受外在环境影响的马达控制响应；首先，根据量测三相电流与利用变频器的切换状态取得马达的三相电压，将其转换至d-q轴静止座标，然后藉此估测马达的磁通量与转矩量，再分别与侦测的定子磁通量和转矩量比较后，得到定子磁通量与转矩量比较的结果，再利用DTC电压向量切换表(DTC Voltage Vector Switching table)，依定子磁通与转矩的比较值及马达所在的角度位置，来选择一个适当的电压向量，进而依切换顺序来激发功率电晶体，达到控制感应马达的目的。

This paper introduces the control principle of the direct torque control system of an asynchronous motor,and proposes a new strategy to solve the problem of the large torque ripple and current ripple.

本文介绍了直接转矩控制系统的控制原理，并针对基于直接转矩控制的异步电动机运行时存在较大的电流及转矩脉动问题，提出一种新的控制方案，并基于Matlab 6。

This paper introduces the control principle of the direct torque control system of an asynchronous motor, and proposes a new strategy to solve the problem of the large torque ripple and current ripple. The Matlab 6.5 simulation shows that it can solve the problem efficiently.

本文介绍了直接转矩控制系统的控制原理，并针对基于直接转矩控制的异步电动机运行时存在较大的电流及转矩脉动问题，提出一种新的控制方案，并基于Matlab 6.5对这种新方法进行仿真，仿真结果表明该方案能有效的解决电流及转矩脉动的问题。

Direct electrochemical oxidation of hydrocarbon fuels is the current development trend of solid oxide fuel cells.

固体氧化物燃料电池的发展随着能源问题和环境问题的突显而越来越成为各国研究的热点。

Working directly with Production, Sales, Purchasing, Warehouse and direct reporting to the General Manager of Operations you will be charged with the responsibility of working and reporting across all boundaries to perform world's best practice in managing MRP through the ERP system, management of current and planned inventories, new materials requirements and the minimisation of SLOBS.

直接和生产、业务、采购、仓库一起工作，直接向公司运作总经理汇报工作，在通过ERP系统管理MRP、当前及计划库存、新材料需求及SLOBS最少量管理中，你将全责的跨部门地工作

Working directly with Production, Sales, Purchasing, Warehouse and direct reporting to the General Manager of Operations you will be charged with the responsibility of working and reporting across all boundaries to perform world's best practice in managing MRP through the ERP system, management of current and planned inventories, new materials requirements and the minimisation of SLOBS.

直接和生产、业务、采购、仓库一起工作，直接向公司运作总经理汇报工作，在通过ERP系统管理MRP、当前及计划库、新材料需求及SLOBS最少量管理中，你将全责的跨部门的工作

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。