以下为句子列表：
英文: Abstract：In this paper, the shunt active power filter can compensate the harmonics generated by the harmonic source of current source type well, and it is built into models and simulated by the Power System Blockset, toolbox of MATLAB.
中文: 摘要：并联型有源电力滤波器可较好的补偿电流源产生的谐波，利用MATLAB中的电力系统仿真工具箱对其进行建模与仿真。
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英文: According to the tests on ball-feed ratio, medium filling percent age, ground pulp density, active power and grinding efficiency, the authors anal yse main factors affecting ball mill′s active power and grinding efficiency, es tablishing the relationship
中文: 通过对球磨机球料比、介质充填率和磨矿浓度与有功功率和磨矿效率试验，分析了影响球磨机功率和磨矿效率的主要因素，建立了球磨机内部状态(球料比、介质充填率和磨矿浓度)与外部参数(有功功率、磨矿效率)之间的关系，提出了改善磨矿效率的合理操作参数。
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英文: Consider a cloud of gas that is contracting inward under the attractive power of its own gravity.
中文: 考虑一团云气在自身重力的吸引影响下向内收缩。
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英文: For excessive electric energy loss in distribution network in our country, optimal control of reactive power is put forward in distribution network to decrease the line loss and increase the energy utilization rate.
中文: 摘要针对我国电网电能损耗过大，提出在配电网装设无功优化控制以降低线损，提高电能利用率。
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英文: GCK low voltage draw-out switchgear conforms to requirements of standard GB7251.1, JB/T9661 and IEC439-1, it is suitable for power system of rated voltage 380-660V，AC three-phase 50-60HZ, to be used as distribution, motor control and reactive power compen
中文: GCK型低压抽出式开关设备符合GB7251.1、JB/T9661、IEC439-1等标准的要求，适用于额定电压380-660V，交流三相50-60HZ的电力系统中,作为配电和电动机控制以及无功功率补偿之用。
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