本文用射影观点考察三角形的“五心”定理，通过配极变换推出五个新的命题。
The author of the essay studies the transmutation of the triangular theorem of "Five Centers" theorem from the projective viewpoint and puts forward five thoughtful propositions through polarization.
该文系统地讨论二极管工作在开关特性下所组成电路的频率变换的工作原理。
This paper tries to discuss the work principle of frequency transformation on the circuit where diodes work on on-off speciality.
论述了极指数栅格坐标和极对数坐标变换原理以及在测距方面的应用。
This paper described the transformation theory of polar_log grid coordinate and its application to distance_measuring.
采用单绕组变极方法实现速度变换。
Uses the simplex winding polarity reversal method to realize the speed transformation.
给出了函数的极态概念，讨论了极态变换的公式和应用。
The concept of limit form with function is given, then the transformation formulas of limit form and some applications are discussed.
对于地球极表象为直线的投影，本文运用对偶变换和广义轴位变换，得出了它们的几种新款式。
This paper obtains some new types by using dualistic transformation and generalized transformation of axis, the projections in straight line for earth pole.
通过对方向矩阵进行极分解构造聚焦矩阵，把各个窄带频率处的信号子空间变换到聚焦频率处的信号子空间。
Focus matrix is constructed by polar decomposition of location matrix and transforms signal subspace at different frequency bins to signal subspace at focusing frequency bin.
本文采用并矢格林函数和场量变换方法，给出了圆形波导中偶极天线辐射的普遍公式。
The general formulas of radiation from dipole antenna in a circular waveguide are given by means of dyadic Green's function and field transformation.
采用功率MOSFET取代普通二极管或肖特基二极管的同步整流技术，可以使低压大电流变换器的效率得到极大的提高。
Applying the synchronous rectifier technology in which MOSFET replaces common diodes or schottky diodes can increase the efficiency of low-voltage, great-current transformer.
利用相对论变换关系计算了沿轴线方向匀速运动的线性电四极子的电磁场。
The electromagnetic field of a linear electric quadrupole moving uniformly along the axis of the quadrupole has been calculated with the relativistic transformation relation.
二极管箝位多电平变换器在控制功率的双向流动方面有优势，因而在中压变频调速领域和交流柔性供电系统中有着良好的应用前景。
Being advantageous in control of bidirectional power flow, diode-clamping multilevel converters are more and more concerned, researched and applied in medium-voltage motor driving and FACTS equipment.
对于大功率的GTO逆变器，提出了一种零电压转换(ZVS)的三电平辅助谐振变换极逆变器(ARCPI)。
A zero-voltage-switching (ZVS) three-level auxiliary resonant commutated pole inverter (ARCPI) is presented for high power GTO ones.
传统交错并联双管正激组合变换器应用于高电压输出场合时存在变换器次级电压偏高、高频整流二极管电压应力大的问题。
The traditional interleaved two transistor forward converter exists high voltage stress of freewheeling diode when applied in high output voltage condition.
为了达到系统高性能的技术指标和多功能的自诊断目的，在控制系统中采用了双cpu，主电路采用了双极式可逆pwm变换器。
For the sake of high performance technique index sign and multi-function from examining the trouble, it adopts double - CPU in control system and double-pole type PWM in the power circuit.
提出了有源钳位准谐振变换器的一种新的驱动方式，它无需经过数字电路延时，只需一个电阻和二极管构成的小网络。
This paper proposes a new gate drive method for active clamped quasi resonant converters. Instead of a digital delay circuit, only a resistor and a diode are added to produce correct drive waveforms.
采用许瓦兹-克里斯托福变换，求得了以椭圆锥为发射体的真空微电子二极管区域的电位分布的解析解。
In this paper, a conformal mapping analysis of a vacuum microelectronic diode is presented, which uses an elliptic cone conductor as its cathode.
通过设置死区时间实现开关功率器件的零电压开通与关断，利用该变换器研制出GTO门极驱动用电源。
The turn-on and turn-off of power devices under zero voltage are realized with addition of dead time. The power supply for GTO gate driver is developed by use of the converter.
而该跟踪升压变换器级又包括输入扼流圈(10)、升压二极管(16)和大电容器(17)。
The boost converter stage in turn comprises an input choke (10), a boost diode (16) and a bulk capacitor (17).
传统二极管箝位变换器的电压变化率和共模电压较高，且波形谐波含量较大，使得输出滤波器的设计变得复杂。
Traditional diode-clamped converters have high voltage variation rate, common-mode voltage and harmonics, which make the design of its output filter complicated.
本文还分析了辅助谐振变换极软开关逆变器的谐振过程，以及辅助管的控制方式，提出了一种通用的谐振参数选取方法。
Moreover, this thesis analyzed the resonant process of ARCP soft-switching inverter, as well as the control strategies for auxiliary switches.
通过采用推挽变压器和两个附加的二极管，该变换器可以实现零电压开关，并且有较高的可靠性。
By using two additional diodes and a push-pull transformer, this converter achieves not only ZVS of all active switches but also high reliability.
每一路变换器都集成了一个主开关管和同步整流管以提高效率，无需外部肖特基二极管。
MP2109 Each converter integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode.
每一路变换器都集成了一个主开关管和同步整流管以提高效率，无需外部肖特基二极管。
MP2109 Each converter integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode.
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