查询词典 power supply

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Due to the current, induced by a lightening strike or a fault , flows into the mesh , a potential rise and an influx of circumambient current could induce a major fault .In order to maintain a safe and stable power supply system and to protect workmen and equipments form being damaged.

为使电力系统供电之稳定与安全，变电所接地系统相对重要，而变电所接地系统的主要目的，除了确保人员的安全之外，并须保护机器设备免於受损。

FEATURES Clickless Bilateral Audio Switching Guaranteed Break-Before-Make Switching Low Distortion: 0.003% typ Low Noise: 1 nV/Hz Superb OFF-Isolation: 120 dB typ Low ON-Resistance: 60 typ Wide Signal Range: VS = 18 V; 10 V rms Wide Power Supply Range: 20 V max Available in Dice Form

特点无杂音双边音频切换保先断后接开关低失真：0.003％典型值低噪声：1纳伏/赫兹卓越的隔离性：120分贝典型值低导通电阻：60典型宽信号范围：比= 18伏； 10 V RMS的宽电源电压范围：20 V的最大可用表格中骰子

Secondly, models for performance evaluation of power supply enterprises are constructed, which are based on date envelopment analysis and principal compone...

最后，通过案例分析，证明该评价体系及模型是有效和可行的，并提出相应的提高供电企业绩效水平的措施。

4 All exposed dead metal parts of a cord-connected appliance that is equipped with a grounding conductor, and all dead metal parts within the enclosure that are exposed to contact during any user servicing and are likely to become energized, shall be conductively connected to the grounding conductor of the power-supply cord.

27.4一个有接地导体的线连接电器的所有的外露金属件及在外壳内外露且用户在使用过程中可能触及的带电固定金属件，都应同电源线的接地导体相连。

1 In an appliance intended for permanent connection to the power supply by a metal-enclosed wiring system (such as rigid metal conduit or armored cable), all exposed dead metal parts and all dead metal parts inside the enclosure that are exposed to contact during any servicing operation (including maintenance and repair) and that are likely to become energized shall be conductively connected to the point at which the cable armor, conduit, and the like, is attached to the appliance.

27.1电器通过金属密封系统同电源永久性连接，所有的外露金属固定件及电器工作时，在外壳内裸露连接的金属固定件及那些可能带电的物体，都应在导电连接处加上作为电器附属物的保护壳，导管及类似的东西。

Experiment results show that the method enhances the efficiency of power supply consumedly.

试验结果证明该方法极大地提高了电源的效率。

An optimization model of electricity and heat efficiency about intermediate frequency coreless induction furnace in the nonmagnetic process is established by using some restriction parameters such as power supply frequency and the diameter of steel stab,and its optimization design is done based on particle swarm optimization algorithms.

以电源频率和坯料直径为约束参数，建立了无芯中频感应电炉无磁性期电热效率优化模型，采用粒子群优化算法对其进行了优化。

Recently,the control of power supply of high frequency switch has been developed towards the "high refined and cuspidate" direction.Although the parts of apparatus have small volume and refined precision,the Electro Magnetic Interference and radiation are much stronger than before.

现在的高频开关电源控制已向&高、精、尖&方向发展，这些器件体积小、精度高，但电源内部的电磁干扰、辐射比原来更强了，为了使高频开关电源在预期的电磁环境下能正常工作、无性能降低及故障，并对电磁环境中的任何事物不构成电磁干扰，必需对其进行电磁兼容。

For example, with 0.5 mM diethanolamine as the pump carrier, only 1 minute was required to make its flow rate stable after switching on the pump power supply.

而且电渗流量更容易达到稳定，尤其是在泵启动初期或电极极性改变时，所需达到稳定的时间大大缩短，只需要1分钟就可以达到稳定流量并保持稳定工作2小时以上。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。