practical duty

The influences of different switching mode of PWM are discussed. Then a practical method, "three-state algorithm of invariable duty cycle under forced output mode" is brought out to eliminate the commutation dead band generated by switching among the output interfaces of PWM waveform.

详细分析了PWM脉冲的不同切换方式对电机换相控制的影响，提出消除换相死区的具体算法&强迫输出方式下的2001年上海大学博士学位论文三状态恒定占空比算法。

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Practical and Theoretical Considerations on Duty Crime Prevention in Universities

预防高校职务犯罪的实践与理论思考

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Introduces three methods that can adjust refrigerating output according to the variation of load aimed at the varying duty condition during the practical operation process of refrigeration system, frequency inverter technique, parallel unit with several compressors and liquid refrigerant storing method.

针对制冷系统实际运行过程中存在的变负荷工况，介绍三种根据负荷变化调节制冷量的方法：变频技术、多机并联压缩机组以及液体制冷剂储存方法。

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According to the practical fabrication process of CSG, a comprehensive fabrication error model of CSG including alignment error, duty cycle error, depth error and stair slope error is built up.

根据色分离光栅的实际制作过程建立了包含对位误差、占空比误差、刻蚀深度误差、塌边误差等多种制作误差的色分离光栅加工误差模型。

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Objective: To give the Decision of Sample-forming Medical Units for Manoeuvre in case of Sudden Affairs, providing highly practical and visible auxiliary decision tool for departments of military health management, to raise the decision level of regional military health resources on reserve duty deployment.

目的：解决应对突发事件抽组机动卫勤力量的决策问题，为军队卫生管理部门提供实用性强、可视化的辅助决策工具，以提高区域预编军队卫生资源配置决策水平。

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