| 1. | Boundary integral equation of electromagnetic field with line current element of external source
存在外源线电流元的电磁场边界积分方程 |
| 2. | The near and far field properties of line current of arbitrary shape is demonstrated in this example
本例以赫芝电偶极电磁场合成之近似结果，验证偶极天线远场及近场之特性。 |
| 3. | In the term of restoration reconfiguration , it is necessary to assure that all lines current and nodes voltage are in the limits of safety
故障恢复过程中保证所有的线路电流或节点电压在安全范围限度内。 |
| 4. | Each segment of line current can be approximated as a hertzian dipole if each segment is much smaller then a wave length
因此任意线电流在三度空间之三维向量电磁场即可以赫芝电偶极完整之远场及近场近似合成之。 |
| 5. | The poynting vector that represent the flow of electromagnetic power density on a sphere from a linear dipole antenna is approximated by the summation of the field of segmented line current as hertz dipoles
以赫芝偶极之电磁场合成任意长度偶极天线在球面上电磁功率密度流之时变玻因亭向量。 |
| 6. | Abstract : the ever increasing number and power of polluting loads ( non - linear , time - variant loads and so on ) connected to the electric power network cause a significant distortion in the line voltage and line current
文摘:电力系统电网中逐渐增多的“污染性”负荷（如非线性负荷、时变负荷等）正在使电网中的电流、电压出现越来越多的、显著的畸变。 |
| 7. | These new methods adopt the circuit information contained in the power supply line current to realize the fault diagnosis . it can increase the fault coverage , reduce testing cost and improve the quality and reliability of ics
它通过从电源电流信号中提取有效的信息来进行故障诊断,能够提高故障覆盖率,降低测试成本并提高集成电路产品的质量与可靠性。 |
| 8. | To reduce the harmonics in the line current , the random pwm mode is adapt . related to the typically constant pwm carrier frequency and its high harmonics , modulation of this frequency can be used to decrease emi and cost no more gain
为了抑制输入电流中一些幅值较大的谐波成分，利用dsp控制的特点，电路采用了随机pwm方式，在不增加系统成本的前提下，有效地抑制了输入电流的高次谐波含量。 |
| 9. | An arbitrary shaped line current on a horizontal plane is divided into many small line segments and approximated by hertzian diploes , then both the near and far em - field of the line curennt is approximated by the summation of the complete near and far fields of hertz dipoles
水平面上任意形状线电流分割为许多小段之电流，每一小段之电流近似为赫芝偶极，则在三度空间任意座标平面上无论远近之电磁场即可以赫芝偶极之远近完整电磁场加总合成近似之。 |
| 10. | The conventional switching power supply usually use a diode rectifier followed by a bulk capacitor to convert ac voltage to dc voltage , resulting in the pulsating waveform of the input ac line current , low power factor ( generally 0 . 65 ) and high harmonic line current
传统的开关电源设备通常采用二极管桥来进行整流和一个较大的电解电容来进行滤波以实现输入电压的交直流转换，导致输入电流为一个很窄的脉冲波并含有较多的谐波分量，功率因数变低(通常只有0 . 65 ) 。 |
