查询词典 combination frequency

The thyristor static state invertor's frequency range is narrow, if time sensor change, cannot carry on the frequency control.

晶闸管静态逆变器的频率范围窄，如感应器改变时，不能进行频率调节。

A detailed analysis of the main circuit introduction, control method and working principle of the direct-drive wind energy conversion system are given to introduce the two important parts a of this paper: First part is the control method of the multiple boost convertor, the important instantaneous current control method of this paper is given through the analysis of the main circuit structure, control method and working principle. Then a steady-state analysis for low-frequency, a high-frequency component analysis, and a closed-loop tracking performance analysis for dynamic response are provided to analyze the method proposed; And the second part is the control method of invertor.

在系统变流器整体结构分析的基础上，引出本文重点研究的两个变流环节的控制：第一部分是系统升压斩波器的控制，通过分析相关主电路结构、原理，建立了数学模型，引出本文重点研究的瞬时值控制策略的概念和具体实现，并对升压斩波器的瞬时值控制策略进行了详细的高频、低频模型分析和稳态、动态性能分析；第二部分是系统并网逆变器的控制，通过对逆变器主电路的数学建模和控制要求分析，研究了并网逆变器的瞬时值控制策略，包括电感电流控制内环和直流电压控制外环的具体设计和实现方法。

The present thesis aims mainly at studying power absorption of high frequency electromagnetic waves in partially ionized plasma layer in atmospheric conditions, with effects of negative ions in atmosphere, collision rate between electron and neuter gas, the external magnetic field, and nonlinear effects on power absorption of high frequency electromagnetic waves in partially ionized plasma layer under atmospheric conditions.

本文主要研究了高频电磁波在大气压等离子体层中传播和吸收的特性，着重考虑了大气中的负离子、电子与中性气体的碰撞频率、外加磁场、以及非线性现象对高频电磁波在大气压等离子体层中的传播的物理机制和吸收的影响。

But for Irkutsk to the Great Wall Station circuit,there is little relationship between the fading depth and frequency.It seems that the relationship between fading depth and frequency is controlled by the factors such as location,distance etc.

但依尔库茨克－南极长城站电路的衰落深度与频率、时间无关，说明衰落深度与频率、时间的关系还要受距离、位置等因素的影响。

This paper analyses the operation characteristic of portal jib crane,and discuss selecting principle and calculation formulas of motor and capacity which frequency inverter and it's brake type and accessory of the AC variable frequency and speed regulation applied to portal jib crane , finally introduce case which CHV190 inverter applied in portal jib crane .

本文分析了门座式起重机的运行特点，详细阐述了英威腾 CHV190起重机专用变频器用于门座式起重机调速时的电动机、变频器及其制动方式的选型原则和变频器周边设备的容量计算方法，最后介绍了 CHV190变频器在门座式起重机中的应用案例。

Melting adopted from German Junker 5-ton double furnace double electric supply medium frequency induction furnace, 15-ton double furnace double electric supply medium frequency induction holding furnace, 2sets of 8-ton per hour water cold continuously melting cupola .

熔化采用德国容克公司5吨双炉体双供电中频感应熔炼炉，15吨双炉体双供电中频感应保温炉，两台8吨/小时水冷连续熔化冲天炉；混砂采用德国爱立许砂处理系统，处理能力每小时可达160吨；制芯采用德国兰佩F40数控热芯盒射芯机、F40数控冷芯盒射芯机，适应各种缸盖、缸体、飞轮、排气歧管等制芯。

The results showed that the kerf width increases with the increase of the power density, pulse frequency and pulse width; the cutting speed is increased and the cutting quality is improved with increasing the pulse frequency.

结果表明，缝宽随激光功率密度、频率以及脉宽的增加而加大；提高激光输出重复频率，不仅有利于提高加工质量，而且可以增大切割速度，提高加工效率。

6800G Blu-ray version of the wireless kit is a colorful Technology recently recommended a new suite of wireless power, using zero-latency 2.4GHZ radio frequency technology, can receive information from up to 10 meters; 16 radio channels, can be automatically frequency-hopping; keyboard with full - The new ultra-thin keycap, laser character, mute better effect, and the permanent lossless.

多彩科技是国内著名的外设厂商，商品性价比非常高。6800G蓝光版无线套件是多彩科技近期全新推荐的一款无线省电套件，采用零延迟2.4GHZ无线射频科技，接收距离可达10米；16个无线频道，可自动跳频；键盘采用全新超薄键帽，镭射字符，静音效果更佳，且永久不掉字。

By using low-frequency dynamic frequency density wave, the OA kneepad could regulate many aspects of pathological process of knee OA including: inhibition of biological effects of cytokine, MMP-3, HA, oxygen free radicals and NO; enhancing the biological activity of SOD; up-regulating the mRNA expression of Bcl-2 as well as down-regulating the mRNA expression of P53, thereby to inhibit the apoptosis of cartilage cells and delay the cartilage degeneration of the macro-morphology, cartilage cells and cartilage matrix.

OA护膝采用低频温热动态变频疏密波，针对膝OA病理过程中的多个环节进行调节，能有效抑制细胞因子、MMP－3、HA、氧自由基、NO的生物学效应，增强SOD的生物学活性，提高关节软骨细胞Bcl-2mRNA表达，减弱软骨细胞P53mRNA表达，从而抑制软骨细胞凋亡，延缓膝关节软骨宏观形态、软骨细胞及软骨基质的退变。

The Company mainly operates and acts as the agent for the following products including:frequency conversion cabinet,frequency converter,soft starter,automated control system,series of low-voltage circuit breaker,contactor,control relay,protective relay,knife switch,isolating switch,capacitor,dual power switching unit,low-voltage mutual inductor,low-voltage fuse,high-voltage vacuum circuit breaker,high-voltage mutual inductor,high-voltage load switch,high-voltage fuse,microcomputer integrated protection device and components and parts including automatic control products, Lights,button,terminal,electric meters and electromechanical products including pump,valve fan,motor,voltage transformer,wires and cables.

公司主要经营及代理的产品有：变频柜、变频器、软启动器、自动化控制系列及系列低压断路器、接器、控制继电器、保护继电器、刀开关、隔离开关、电容器、双电源切换装置、高压真空断路器、高低压互感器、高压负荷开关、高低压熔断器、微机综合保护装置及自动化控制产品、信号灯、按钮、端子、电度表等元器件及水泵、阀门、风机、电机、变压器、电线电缆等机电产品约1000多个品种、20000余种常用规格。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。