交流分析

It is important to analyze the characteristics of magnetic system in the optimization design of the AC contactor.

交流接触器电磁机构特性包括静态特性和动态特性，合理的电磁机构特性仿真分析对于接触器的优化设计具有重要意义。

The dynamic characteristic of intelligent AC contactor was simulated,then the effect on characteristic by intelligent control and optimization were analyzed.

仿真了智能交流接触器的动态特性，分析了智能控制对其特性的影响和优化。

In this paper, based on the analysis of the structure, movement principle and math model of PMSM, fundamental theories of vector control, coordinates transform and algorithm of space vector PWM are introduced and PI control, speed and position calculation methods are discussed.

本论文在分析了PMSM的结构、运动原理及数学模型的基础上，系统地阐述了PMSM交流伺服系统矢量控制的基本原理、坐标变换方法及空间矢量脉冲宽度调制波的生成算法，论述了PI控制算法和速度位置计算方法。

This article intended to analyze and compare its function in English and Chinese social communication from the following aspects: protocol function in personal communication; active function in language speaking; humorous function in making the meaning of words more funny; deceit function in coving up the truth; ironic function in lashing out against the society and human nature.

本文从五个方面分析和比较了委婉语在中英社会交际中的功能，即：人际交流中的礼仪功能，言谈措辞的积极功能，使语言妙趣横生的幽默功能，掩盖事实真相的欺骗功能和鞭挞社会，人性的讽刺功能。

Two LVRT methods are compared in this dissertation. One is to use VSC valve with larger current capacity, and the other is to use reference current limiter in control system.

对VSC阀在交流电网低电压故障下的过流现象进行分析并提出了一种考虑正负序分量影响的指令电流限制器，保证了故障限流效果。

According to diffusionism , analysis of geographic distribution of traditional sports in different areas can reveal the clues of migration of human populations and cultural intercourse of sport.

应用文化传播论对不同地区传统体育的地理分布进行分析，可以发现人类群体迁徙和体育文化交流的线索。

And the thesis is divided into 4 parts.In the first part, the development of technology on Adjustable Speed AC Dirve is introduced. And the theory of DTC is analyzed. Besides the two classic DTC strategy, the hexagon flux track and approximate circle flux track controlling system, the thesis introduces some DTC strategies modified and some new controlling arithmetics.

论文共分为四个部分：第一部分介绍了交流调速技术的发展，分析了异步电机直接转矩控制的基本原理，除六边形磁链和近似圆形磁链两种经典的DTC控制之外，还介绍了改进型DTC及其他新型的控制算法。

Research of Engineering Design Simulation Model and Application on Double Loop Speed Control System;2. The double loop series adjustable speed system is worth to use in pratice bec.

为了改善串级润达系统的性能指标，根据交流调速理论及自动控制的系统的原理，介绍了Pn控制的双闭环串级调速系统的组成、工作原理和操作步骤，简要分析了调速系统的动态性能。

With the change of the internal and external environments for Wushu to communicate with "others", such five obstructions to transcultural communication as egocentrism in Wushu development, inferiority complex in Wushu development, special presentation forms of Wushu content structure, pursuit of Wushu for "moralism", and "misinterpretation" of Wushu, have occurred in the process of transcultural communication.

随着武术与"他者"交流内外部环境的改变，在跨文化传播过程中出现了武术发展的自我中心主义、武术发展的自卑情结、武术内容结构的特殊表现形式、武术对"道"的追求，以及对武术的"误读"五方面跨文化传播的障碍，对这五方面障碍的深入分析，对于武术真正走向世界具有重要意义，切实理解武术自身和所需跨越的环境才能为武术的跨文化传播做出贡献。

It was carried out successfully to microarc electrodeposit ceramic coatings on the anode and cathode of AZ91D magnesium cast alloy with AC pulse method. The thicknesses, morphologies, composition and micro-structures of the coatings were studied by scanning electron microscopy and X ray diffraction.

利用交流脉冲方法在AZ91D铸造镁合金表面成功实现阴、阳极微弧电沉积陶瓷膜，并使用SEM和xRD等手段对陶瓷膜的厚度、组织形貌、成分、结构和耐蚀性作了相应研究分析。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。