毕业论文格式1.1版.docVIP

齐　齐　哈　尔　大　学 毕业设计（论文） 题　　目 能流密度矢量研究 学　　院 理学院 专业班级 物理 101 学生姓名 全秀萍 指导教师 郝斌政 成　　绩 2014年6月15日 摘　要 在电磁场中能量的流动主要用能流密度矢量来描述，在电磁场这种特殊的物质发生内部运动时，也伴随能量的流动，这时能量流动的情况主要应用能流密度矢量进行计算。 随着对能流密度矢量的深入研究，能流密度矢量的应用也非常广泛，利用能流密度矢量计算不同电磁场中能量流动的具体方式，和能量流动的功率等物理量。在本文中主要研究能流密度矢量在三个方面的应用。对能流密度矢量进行理论分析之，通过推导的方式，得出在稳恒电路中，能量是由电磁场携带，并且流动的方式是单向的从电源向负载流动，而不是在导线内通过自由电子的定向移动来传输；在交变电路中能量的流动就不是单一定向的，能量传输会被分为两部分，一部分是被传输到负载的有功功率，另一部分是进行震荡的无功功率，并且根据交流电路的不同，震荡形式也是不同的，这两部分能量传输的功率都需要通过能流密度矢量进行计算；同样应用理论分析的方式应用能流密度矢量描述电磁波在介质中的能量传输，从而分析出平面电磁波在特殊介质中传播而产生奇异现象的原因。 关键词：能流密度矢量；能量传输；稳恒电路；交变电路；左手介质 Abstract The flow of energy in the electromagnetic field Poynting vector is mainly used to describe the electromagnetic field in this particular matter when an internal movement, is also accompanied by the flow of energy, then the energy flow situation is mainly applied to calculate the Poynting vector. With the in-depth study of the energy flux density vector flux density vector is also widely used, the use of different energy flux density vector calculation flow of electromagnetic energy specific way flow of power and energy and other physical quantities. Poynting vector of theoretical analysis, derived by way of the circuit obtained in the steady energy is carried by an electromagnetic field, and the flow is unidirectional manner from a power source to the load current, rather than through the free inner conductors moving the orientation of the electronic transmission; alternating the flow of energy in the circuit is not a single orientation, the energy transmission is divided into two parts, the real power is transmitted to the load, the other is for the reactive power of the shock, and depending on the AC circuit, the oscillation form is different, the two power transfer part of the energy needed by the flux density vector is calculated; applied the same way as the application of theoretical energy flow density vector describes the transmission of electromagnetic energy in the medium, to