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This topology, combining four switches with double half-wave rectifier and using variable frequency control mode with a refined small times together, achieves the effect of Zero Voltage Switching and the effect of Zero Current Switching by the resonance of resonant capacitance, resonant inductor and the magnetic inductor of the transformer.

该拓扑是一种四开关和双半波组合的结构，采用固定死区的互补调频控制方式，充分利用电路本身的特征，通过谐振电感、谐振电容和变压器的激磁电感谐振，实现零电压开关和零电流开关。

This topology, combining four switches with double half-wave rectifier and using variable frequency control mode with a refined small times together, achieves the effect of Zero Voltage Switching and the effect of Zero Current Switching by the resonance of resonant capacitance, resonant inductor and the magnetic .

该拓扑是一种四开关和双半波组合的结构，采用固定死区的互补调频控制方式，充分利用电路本身的特征，通过谐振电感、谐振电容和变压器的激磁电感谐振，实现零电压开关和零电流开关。

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Through analysis to multilevel invertor a method of switching angle control for Diode-clamping Multilevel Inverter is introduced. The quantity of wave for output voltage is improved and the content of harmonics is reduced. And a design is carried on to realize the control mode based on TMS320F2407DSP.

通过分析多电平逆变器的拓扑结构，选择二极管箝位型多电平逆变器为研究对象，提出在二极管箝位型逆变电路中实现开关角控制的方法，该方法减少了谐波的含量，改善了输出电压的波形，并以TMS320F2407DSP为平台进行了设计实现了该控制策略。

In chapter 3, we study monatomic chain with power-law long-range interactions and get non-propagating intrinsic localized mode in other wave-vector as well as that in the boundary of the phonon Brillouin zone.

第三章研究了长程关联作用下的单原子链中，不仅仅在Brillouin边界处存在非传播的内在局域模：而且 Brillouin边界之外也存在非传播的内在局域模。

Gold the analysis,physics experiment,voice management mode for wave probe intoing waiting,forerunner examining in the equipments,here multifariously revolving,for product quantity providing authentic sciences basis,tiny machine net supervise and controlling managing,completely duct intoing the ISO9001 quantity managing the system,pyramid type,display a new century the norm chemical engineering the industry park District to people of this world.

金相分析、物理试验、超声波探测等，先进检测设备中，在这里频繁运转，为产品质量提供可信的科学依据，微机联网监控管理，全面导入I S O 9 00 1质量管理体系。金字塔式的管理模式，向世人展示一座新世纪规范化工业园区。

In order to solve the fault location problem, this paper analyzes the electric structure of automatic blocking and continuous power transmission line, investigating the transient characteristics of traveling waves generated by different fault in the lines on the basis of traveling wave theory. The results show that transient process of earth fault and short fault in neutral noneffective grounding systems produce aerial mode component of traveling waves with steadyparameters.

为了解决自闭/贯通线路故障自动定位问题，分析了自闭/贯通线路电气结构的特殊性，以行波理论为基础研究了接地故障和相间短路故障产生的暂态电压、电流行波特征，发现接地故障和相间短路故障都存在参数比较稳定的行波线模分量。

In the meantime, mutual to shock wave of wing section surface and attrib border layer interference and turn turn problem undertakes analytic computation, the result makes clear, the numeric method with proper union of mode of Gao-Yong compressible onflow can succeed ground imitate wing section steps sonic and agglutinant flow.

同时，对翼型表面激波和边界层相互干扰以及转捩新问题进行分析计算，结果表明，Gao-Yong可压缩湍流模式结合适当的数值方法能够成功地模拟翼型跨音速粘性流动。

After a description of the basic principle of vertical ultrasonic guided wave, this paper has made an analysis on the variation of the displacement offset of vertical mode variant with frequency; it has also presented an approach by which a pectinate symmetrical transducer be used to effectively detect pipeline flaws.

在纵向超声导波基本原理的基础上，分析了两种纵向模式位移分量随频率的变化而变化的情况，给出了一种梳状对称换能器对管道缺陷的有效检测。

To bring the charm of Debussy's music, people often think of the piano song "Moonlight" It's a transparent floating slowly down the soft light;"Night in Granada," which is slightly lost in the guitar and pizzicato sound of distant ring sound board decorated by the Spanish style;"water reflection" in the reverse position to carry out the chords to the music mode constitutes a symbol of water ripple, ripple the surface, the dynamics of continuous proliferation; symphonic sketch "spray games" are short motive , the phrase cheerful, bright colors and sound, the playing of the background chatter String outlined noisy waves, wave jumping, laughing water, sunlight flashing screen play.

提起德彪西音乐的魅力，人们常常会想起钢琴曲《月光》那缓缓向下漂浮的透明的柔和光芒；《格拉纳达之夜》中稍现即逝的吉他拨奏与远方响起的响板声所点缀的西班牙情调；《水中倒影》中反向进行的和弦对位构成的音乐模式象征水波荡漾、涟漪泛起，不断扩散的动态；交响素描《浪花游戏》则以短小动机、欢快的乐句，色彩明朗的和声，弦乐颤奏的背景勾勒出波涛喧闹、浪花跳跃、水珠欢笑、阳光闪烁的嬉戏画面。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。