查询词典 current

After that, the author investigated the current condition of the feeding of the old peasants from two aspects: 1 the domestic condition of the aged peasants and the changes from generation to generation; 2 the essential condition of the aged peasants and their degrees of approbation on the issue of the current endowment insurance.

然后从两个方面对我国老年农民养老的现状展开了实证调查：一是农民老人的家庭状况及代际变化情况；二是老年农民的个人情况及对目前养老保险的认可程度。

One of the main characteristics of circuit breaker is that the breaker can open normal current and short circuit current.

本文综合前人所做工作，详细描述了智能操作断路器控制器的工作原理及其主要控制基础，而电网的信号处理、断路器机构调整的方式、频率跟踪等是控制器的重要组成部分。

This article discussed the problem of the relationship between the language nationality and sociality, putting forward oppugnation about "Han mandarin" and country current mandarin, considering that the constitution prescropt about "the whole country current mandarin extended by nation" should be comprehended correctly, in order to take more achievement in whole country extending mandarin.

文章论述了语言的民族性与社会性的关系问题，对"汉语普通话"和"国家通用的普通话"等说法提出了质疑，认为应该正确理解宪法关於"国家推广全国通用的普通话"的规定，使全国推广普通话的工作取得更大成绩。

ABSTRACT The researches of this thesis are carried out around the development of high performance machine tool spindle permanent magnet synchronous motor and its drive system. Five parts are included: First of all, concerning the operating characteristics of the machine tool spindle drive system, the optimum current control strategies of spindle PMSM are determined; The design rules of spindle PMSM's key parameters are summarized, based on the study on the influences of the design parameters on the performances of the PMSM operating at different current control strategies; The practical methods to improve the flux-weakening ability of the PMSM are presented; Based on the analysis and comparison of the operating performances of PMSM with different rotor structures, a novel PMSM rotor structure, which is of excellent mechanical performance, suitable for fluxweakening operation and can improve the torque output capacity in the same time, is presented.

本文围绕高性能机床主轴永磁同步电动机及其传动系统的设计研究展开，所做工作主要包括五部分：首先，确定了主轴永磁同步电动机定子电流的最优控制策略；通过对不同控制策略下主要设计参数对主轴永磁同步电动机性能影响的计算研究，总结了参数设计规律；提出了永磁同步电动机弱磁扩速的实用措施；在分析比较不同转子磁路结构电机的性能，尤其是弱磁扩速能力的基础上，提出了一种机械性能优越，易于弱磁扩速，同时能保证电机恒转矩运行时的转矩输出能力的新型转子磁路结构。

The space quadrature vector oriented control can decouple between output current and frequency of the inverter by Park transformation, which guarantee the quite high accuracy of the 90 degree phase angle between the two-phase output current that supply for two phase electromagnetic stirrer in quite low frequency.

提出了一种基于空间矢量定向的二相电磁搅拌器逆变电源的结构和控制策略，该逆变器采用六桥臂式主电路拓扑结构，逆变器的第三相桥臂与两相电磁搅拌器的中点相连。

For the current situations that electrical power operation environment is more complex, the power organization reformconstantly, the electricity market is formed step by step, the current electrical equipment is outdate, and for the so many problems that lowenergy efficiency, poor power quality, less interaction between customers and power grid company, this paper defines the smart grid that is suited to China's power grid situation, and summarizes five features for the smart grid such as self-healing, interactive, optimization,compatibility, integration and the differences between smart grid and traditional grid, then introduces the four systems of smart grid and two foundations before building the smart grid, and finally concludes that smart grid is the inevitable result for the economical and technological development.

针对目前电力运行环境的日趋复杂、电力体制改革的不断前进、电力市场的逐步行成、现有的电力设备亟待更新、能源利用率低、电能质量差、用户与电网公司交互作用少等诸多问题，讨论了适合中国电网情况的智能电网的定义，总结出了智能电网自愈、互动、优化、兼容、集成五大特点，概括出了智能电网和传统电网的区别，并详细介绍了构成智能电网的四大体系和建立智能电网的两大基础，最后总结出智能电网是经济和技术发展的必然结果，我国应加快智能电网的研究发展。

Under all conditions,the difference of output current between inverters is less than 2 % of rated current.

同时具有较好的负载适应性，在各种情况下，各逆变电源的输出电流差小于额定电流的2%。

In theory, the wavy frequency of the APU output current is six times of the generator phase current.

从理论上讲，波浪频率的辅助动力装置的输出电流6倍的发电机相电流。

Steady output voltage and current,high quality welding,advanced control technology,wide current scope.

输出电压和电流稳定，焊接质量高，控制技术先进，电流调节范围宽。

Our country current industrial economic benefits comprehensive evaluation index system by total assets contribution rate, such seven indexes as capital value preserving and appreciation rate , asset-liability ratio , turnover rate of the current assets , expenses profit rate of the cost , sales rate of the products , overall labour productivity ,etc.

对我国工业经济效益的考核，迄今为止采用的仍是1998年进行试算，1999年按月对外发布的工业经济效益考核指标体系，经过6年多的运行，已经趋于成熟，一些问题却也随之暴露出来。同时，随着工业经济形态向知识经济形态的转变，可持续发展问题日益被人民所重视，客观上对工业经济效益的考核提出了新的要求，故对我国现行工业经济效益考核的指标体系做如下探讨。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。