查询词典 air current

In the case of short - circuit,the output current amplitude and phase of PWM converter are controlled to adjust the equivalent impedance of current - limiter for fault current suppression.

故障发生后，通过变流器控制变压器二次侧注入电流的相位和幅值，进而调节限流器的等效阻抗，从而实现抑制短路电流的目的。

A fter analyzed the quick-current reflowing and the slow-current reflowing control methods, the author brings forward a mew method named mixed-current reflowing control.

在分析快续流和慢续流控制方式的基础上，提出了一种混合续流的新控制方法。

Based on Combination of the MMF equation and the branch current equation, an expanded equation about the winding currents and current-limiting reactances is obtained. According to the feature that the control windings are short-circuited in turn, the current-limiting reactances are calculated for each control winding step by step.

把磁势平衡方程和支路电流方程相结合，推导并得到了关于绕组电流和限流电抗的增广方程，再根据控制绕组顺次短路工作的特点，提出了CRT的各级限流电抗值的一种递推算法。

In the recent years,supported by National Natural Science Foundation of China,the faculty in Zhejiang University have begun the research of solid states power switch and fault current limiting technology. They provide a novel solid states fault current limiting technology,which possesses flexible control mode. It is feasible to develop a well-performed fault current limiter.

近年来，浙江大学有关人员在国家自然科学基金的支持下，开展&固态功率开关及短路限流技术的研究&，提出了一种全新的固态短路限流技术，具有许多灵活的控制方式，完全有条件开发成一种性能优良的短路限流装置。

L Intelligent three-phase charge mode: We adopt constant current technology at the beginning of charge, which can made current invariable and avoid battery broken or accelerating battery aging. It can convert to constant- voltage and current-limiting charge when charge voltage achieves upper limit voltage, which can improve effectively the capacity conversion efficiency of battery. Trickle and floating charge make each single cell battery constant receive electricity and ensure battery capacity can be recall most, which solved the unbalanced phenomenon of single cell battery and avoid the danger of voltage change and the end of battery charge, extend battery life.

l 智能三阶段充电模式：充电初期采用恒流技术，使充电电流恒定，避免损坏电池，加速电池的老化；充电电压达到上限电压时自动转换为恒压限流充电，有效的提高了蓄电池的容量转换效率；涓流浮充使各单体电池均衡受电，保证电池容量得以最大限度恢复，有效解决单体电压不均衡现象，避免了市电电压的变化和蓄电池充电的末期造成的蓄电池过压充电的危险，大大延长了蓄电池的使用寿命。

Allowable current density is firstly confirmed by analyzing the variation of current efficiency with current density. Effects of content of ammonia ions, pH value and the content of sodium formate upon the throwing power, covering power and ability of anti-impurities, were measured.

首先通过分析电流效率随电流密度的变化情况确定了镀液的许用电流密度，然后测定了氨的含量、镀液pH值、甲酸钠的含量等因素对分散能力、深镀能力、抗杂性能等镀液性能的影响。

And base on topological structure of SVG for three-phase three-wire system, it puts forward a control method of compensation current which is based on forecasting current strategy to improve the tracking accuracy of dictation current.

同时，在三相三线制电压型静止无功发生器拓扑结构的基础上，论证了两种直接电流控制方法：滞环控制和三角波控制。

The main formation causes of storm current are convergence of tidal current and special topography and the strength of storm current depends mainly on the released disordered potential energy .

对滦河口近海激流的形成进行了讨论，认为潮流的辐合和特殊的地形是激流形成的主要原因，而激流的大小则主要取决于无序位能的释放量。

Although forest canopy layer could prevent splash erosion effectively, clay was taken away by overland flow and run off easily, the erosion amount became less after removing the forest canopy and surface soil, while the splash erosion still produced in the surface layer; the splash function weakened after having water current, the starting particles were less than bareland, so removing the surface disturbed soil made the erosion amount and clay less, silty sand more than bareland, but unsteady, the wear and tear energy used by raindrop splash and current function for overcoming sediments separating and starting were comparatively large, sediments were very difficult to be started and transported, it explained that forest root systems could increase anti-erosion capability of forest vegetation, make rainfall-current system splash and export finer particles than bareland.

虽然林冠层能有效防止溅蚀的发生，但坡面流还是能带走粘粒部分，粘粒还是容易流失。去除林冠和表层土后，侵蚀量变得更少，但表层还是会被溅蚀，有水流后，溅蚀作用减弱，颗粒起动的比裸地的少，所以，去除表层扰动土后，侵蚀量更少，粉沙多，粘粒比裸地更少一些，但不稳定，雨滴击溅和水流作用用于克服泥沙分离起动损耗的能量较大，很难被起动输移，这说明森林植被根系的作用增加了林地植被的抗蚀力，使降雨一水流系统仅能溅起输出比裸地坡面更细小的泥沙颗粒。

Projector speaking of the ideal tool for speech, take you from a speech in front of the liberation of equipment, no longer have to make a gesture of sly next to the computer so that colleagues to the edge of your slides replacement pages # large and clear indication of the current slides of the title and location # let you precise control speech rhythm, the timer will display the current time and cost of the lecture time and rapid # privacy from cell phone screen to access the current slide pages Notes # speech outline WM system to support all of their phone screen resolution # Wireless, the most remote computer up to 10m, or 30 feet now he can finally use : Devlex PhonePoint v3.0 for sp some computers unusable above you in RI Your computer installation.

的语音投影机上的理想工具，从一个设备的解放阵线在施政报告中，没有必要再狡猾的姿态下的计算机，以便对您的幻灯片更换网页的优势大，同事＃的标题和地点目前的幻灯片清楚地表明＃让你精确的控制演讲的节奏，计时器会显示当前时间和演讲时间和快速＃从手机屏幕隐私成本来访问当前幻灯片页笔记＃发言提纲西医系统，以支持其手机屏幕分辨率＃无线，由现在至10米，或30英尺，现在终于可以使用：Devlex PhonePoint 3.0对菌在某些计算机里无法使用你的电脑上面安装你最偏远的计算机上的所有。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48