As the economic globalization deepens, trades among nations are steadily increasing. Therefore, the international business negotiations become more and more significant. In the process of negotiations, the application...As the economic globalization deepens, trades among nations are steadily increasing. Therefore, the international business negotiations become more and more significant. In the process of negotiations, the application of appropriate strategies is necessary for negotiators to reach an agreement smoothly. However, the non-verbal communication plays an important role to some extent in real international business negotiations. This article tends to explore the application of non-verbal strategies in the international business negotiations.展开更多
光伏发电是一种绿色环保技术,为了更好的研究外界环境对光伏电池输出功率的影响,该文建立了光伏电池在改变光强、温度参数下通用四参数工用模型,在此模型基础上,提出了一种基于功率前馈的变步长直接占空比扰动法的最大功率点追踪技术(Ma...光伏发电是一种绿色环保技术,为了更好的研究外界环境对光伏电池输出功率的影响,该文建立了光伏电池在改变光强、温度参数下通用四参数工用模型,在此模型基础上,提出了一种基于功率前馈的变步长直接占空比扰动法的最大功率点追踪技术(Maximum Power Point Trace,MPPT)。首先根据光伏电池等效电路和数学模型建立温度、光强改变时电池的工用模型,以Buck电路的直接占空比数学模型为理论依据对现有的直接占空比扰动观察法做了改进,设计出一种基于功率前馈的变步长直接占空比扰动法算法。结合所建立的光伏电池模型,使用Matlab中的Simulink模块对其进行了特性仿真。仿真结果表明,改进后的变步长直接占空比扰动观察法具有追踪速度快的优点,并且能够在临近最大功率点的地方有效减少扰动观察法的功率振荡损失,提高了追踪的稳定性。展开更多
文摘As the economic globalization deepens, trades among nations are steadily increasing. Therefore, the international business negotiations become more and more significant. In the process of negotiations, the application of appropriate strategies is necessary for negotiators to reach an agreement smoothly. However, the non-verbal communication plays an important role to some extent in real international business negotiations. This article tends to explore the application of non-verbal strategies in the international business negotiations.
文摘光伏发电是一种绿色环保技术,为了更好的研究外界环境对光伏电池输出功率的影响,该文建立了光伏电池在改变光强、温度参数下通用四参数工用模型,在此模型基础上,提出了一种基于功率前馈的变步长直接占空比扰动法的最大功率点追踪技术(Maximum Power Point Trace,MPPT)。首先根据光伏电池等效电路和数学模型建立温度、光强改变时电池的工用模型,以Buck电路的直接占空比数学模型为理论依据对现有的直接占空比扰动观察法做了改进,设计出一种基于功率前馈的变步长直接占空比扰动法算法。结合所建立的光伏电池模型,使用Matlab中的Simulink模块对其进行了特性仿真。仿真结果表明,改进后的变步长直接占空比扰动观察法具有追踪速度快的优点,并且能够在临近最大功率点的地方有效减少扰动观察法的功率振荡损失,提高了追踪的稳定性。