交流性,communication
1)communication[英][k?,mju:n?'ke??n][美][k?'mjun?'ke??n]交流性
1.At present, the research reveals the public and communication character of the outdoor furniture through analyzing its definition, meaning and the relation with landscape environment, and brings forward the view that modern outdoor furniture design must base on the integrative environment and social culture.本文通过对户外家具概念及内涵和户外家具与城市景观环境关系的分析 ,揭示了户外家具具有的公共性和交流性的特征 ,提出了现代户外家具的设计应适应整体环境和社会文化的设计观
2)A.C. magnetic properties交流磁性
英文短句/例句

1.Soft magnetic alloys-Measuring method for alternative magnetic propertiesGB/T3658-1990软磁合金交流磁性能测量方法
2.Study of Field-weakening and Design for Permanent Magnet Alternating Current Traction Motor;永磁交流牵引电动机弱磁特性研究及其设计
3.automatic a.c.d.c.B-H curve tracer交、直流磁特性自动记录装置
4.The Control Strategy and Characteristic Analysis of Dual PWM AC-Excited Machine;双PWM交流励磁电机控制及特性分析
5.Study on Nonlinear Control of Alternate Permanent Magnet Synchronous Motor(APMSM)交流永磁同步电机的非线性控制研究
6.ElectroMagnetic Compatibility Design of AC/DC/AC Converter Used in Wind Power Generator;风力发电用交直交变流器电磁兼容性设计
7.STABILITY OF ROTATING FLEXIBLE DISK UNDER AC ELECTROMAGNET交流电磁铁作用的旋转弹性圆盘稳定性
8.Research in Linearized Decoupling Control of PMSM in AC Servo System交流伺服系统中交流永磁同步电机线性化解耦控制研究
9.Calculation of Dynamic Characteristic of AC Electromagnetic Machanism Considering Iron Loss考虑铁损时交流电磁机构动态特性的计算
10.Analysis and Simulation of Static and Dynamic Characteristic for Electromagnetic Mechanism of AC Contactor;交流接触器电磁机构的动静态特性分析与仿真
11.The Design and Study of High Performance AC Permanent Magnet Synchronous Speed Regulation System高性能交流永磁同步调速系统的设计与研究
12.Controller for AC-DC magnetic bearings based on linear quadratic strategy基于线性二次型策略的交直流磁轴承控制器
13.Parameter Design and Characteristic Analysis for Three-Phase AC Active Magnetic Bearing三相交流主动磁轴承参数设计与特性分析
14.Research on Electromagnetic Compatibility of Atternating-direct Current Hybrid Power Supply System交直流混合供电系统的电磁兼容性研究
15.Numerical Analysis for the Load Characteristic in a Salient-Pole Permanent Magnet Synchronous Generator凸极永磁同步交流发电机负载特性的数值分析
16.Mathematics model and performance analysis for a 3-phase AC hybrid magnetic bearings一种三相交流混合磁轴承数学模型与性能分析
17.Unloading Performance Analysis of AC Exciter in Aeronautic AC Power Supply Based on Maxwell 2D基于Maxwell 2D的航空电源交流励磁机空载特性研究
18.Effect of alternate magnetic field on damping capacity of Fe-16Cr-2.5Mo alloy交流磁场对Fe-16Cr-2.5Mo合金阻尼性能的影响
相关短句/例句

A.C. magnetic properties交流磁性
3)AC characteristic交流特性
1.The irradiation degeneration of AC characteristic of 54HCT244 high-speed CMOS circuits;54HCT244高速CMOS电路交流特性辐照退化研究
2.This article mainly take MAX1324 as an example, from aspect and DC characteristic, error source, temperature effect and AC characteristic, in detail discussed the ADC error to the system performance influence, and proposed the partial adjustments measure.本文主要以MAX 1324为例,从直流特性、误差源、温度效应及交流特性等方面,详细讨论了ADC误差对系统性能的影响,并提出了部分校正措施。
3.Th effect of ADC error on system performance is discussed from four aspect as following:DC characteristic,error source,temperature effects and AC characteristic,and some rectifying measurements are also put forword.本文主要从直流特性、误差源、温度效应及交流特性等方面 ,详细讨论了ADC误差对系统性能的影响 ,并提出了部分校正措施。
4)sexual communication两性交流
1.Functions of bioluminescence include sexual communication, prey attraction, warning, intimidation of predators, illumination, camouflage and population regulation.对国内外萤火虫两性交流闪光信号的研究进行了综述,萤火虫发光器因种而异,多数发出黄绿色萤光,闪光信号的频率、光谱、强度及其时空分布的闪光模式包含着两性交流信息。
5)AC electrical properties交流电性能
1.Magnetostrictive properties and AC electrical properties of activated carbon black filled polypropylene composites;PP/活化炭黑复合材料磁致伸缩与交流电性能
6)a.c. arc stability交流稳弧性
延伸阅读

交流-交流直接变频调速交流-交流直接变频调速variable frequency AC motor speed control by direct AC-AC converter  J一Qoi一u一J一oollu zh一J旧blonP一nt一oosu交流一交流直接变频调速(variable frequeney给定值相对应的三相基准电压。再经过比较器形成触发晶闸管的触发角,并产生触发脉冲,经放大后触发晶闸管。 由于交流一交流变频器中,交流输人侧会产生很大的无功功率,从而降低电源设备利用率;交流输人侧存在着高次谐波电流,将使电源电压的波形发生畸变.如要降低无功功率,可采用中点偏压法、环流控制法、级联法等控制方法。如要降低高次谐波,可采用输出电流波形控制法、两台交流一交流变频器谐调运行等。近来,价格低廉、性能良好的微机控制电路已经产生,从而简化了电路、提高了控制性能。 应用交流一交流变频器为一级(直接)换能,效率可高达90%以上;其换流为电源自然换流,不需要辅助换流电路,简化了主电路;直接变频容易实现四象限运行。但由于交流一交流变频器中晶闸管是靠电网电压进行换流,变频器最高输出频率不超过电网频率的1/2~1/3,否则,输出波形将发生严重的畸变和不对称。因此,这种变频调速适于低速大容量的电动机负载,如球磨机、矿井提升机、轧钢机、卷扬机、风洞等传动;或者将中频变为较低频率供电给电动机进行调速,如电动车辆上将I000H:中频发电机的电能转变为400H:以下的电能供给电动机进行调速。如果交流一交流变频器所带负载是容性的,例如在无换向器电动机中,电流超前于电压,或者采用其他措施进行强迫换流,使晶闸管能及时关断,则交流一交流变频器的输出频率将不受限制,甚至可以做到输出颇率高于电源频率,从而可能实现对高速电动机进行调速。AC motor speed eontrol by direet AC一AC eon-verter)采用交流一交流直接变频器实现交流电动机调速的技术。交流电动机的极对数一定时,其同步转速与供电电源频率成正比,改变频率就能调节电机的转速(见变频调速)。交流一交流变频器就是直接将恒压恒频的交流电通过电力变流器变换为变压变频的交流电源,供电给交流电动机进行调速。常用的交流一交流直接变频调速的线路如图1所示,图l(a)为三相零式线路,图1(b)为三相桥式线路,均采用三组晶闸管反并联可逆变流装置构成三相输出。