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Soft switching can improve the converters efficiency and reduce EMI. In comparison of some methods of approaching soft switching, this thesis presents a Diode Auxiliary Resonant Commutating Network which is composed by an auxiliary bridge and a resonant commutating inductor. This topology not only well realizes zero voltage switching, but also overcomes the parasitic oscillation in the secondary side Diodes. Simultaneously, this topology makes both the secondary side diodes and auxiliary diodes operate on the soft switching state too, which reduces more switching losses and provides requirement for the system to run stably under the condition of self-cooled.

软开关能够提高变换器的效率和降低EMI，通过比较目前多种实现软开关技术方案，本文研究了一种由辅助桥臂和谐振电感组成的二极管辅助谐振换流网络，不但很好地实现了ZVS，并且克服了副边二极管上寄生振荡；同时，该拓扑也使副边二极管和辅助二极管都工作于软开关状态，进一步降低了开关损耗，为系统能够在自冷的条件下稳定运行创造了条件。

They are particularly very promising energy storage systems to replace traditional secondary batteries for space application since URFCs have distinctive advantages over secondary batteries in that they are long-term energy storage systems with extreme high specific energy and without permanent losses by self discharge and capacity limit.

一体式可再生燃料电池是可再生燃料电池中最先进的一种，它是在同一组件上既可以实现燃料电池功能又可以实现水电解功能的储能和供电系统，具有能量密度高、使用寿命长、使用中无自放电且无放电深度及电池容量的限制等优点，是极有希望在空间、军事及可移动电源领域替代传统二次电池的储能系统。

In this thesis, I also give my own ideas on the moral education and the moral evaluation of secondary school students, such as, to infiltrate moral disciplines into secondary school students being the professional ethics of teachers, the evaluation of the infiltration of moral education in teaching being included in the evaluation of teachers, and so on.

在本论文的研究中，笔者根据自己的思考，提出了一些在中学生道德教育和道德评价中的新观点，如在教学中对学生进行德育渗透应该是教师的职业道德、将对教师的学科渗透德育评价纳入对教师的考核评价中等等。

When the positive curving angle increases, the total losses of cascades increase, the outlet flow angles vary acutely along the spanwise, the intensity and size of outlet trailing vortex increase obviously, however the intensity and scale of outlet passage vortex vary slightly, secondary flow at both midspan and endwall increase and the total averaged kinetic energy of secondary flow increases..

随着叶片正弯曲角的增大：叶栅总损失增加；叶栅出口气流角沿叶高剧烈变化；叶栅出口尾缘涡的强度和尺度明显增大，而叶栅出口通道涡的强度和尺度变化都不大；叶栅中部和端部二次流均增强，总平均的二次流动能增大。

From the macro-point view of Christianity history in China, the development of Christian secondary schools after registration in West China indicates that Christian secondary schools was forced to Sinicization under the guide of "Christianizing China".

以整个基督教来华传教的宏大角度观之，华西基督教会中学在立案后的发展状况无不表明，教会中学在&基督化中国&的目标指引下最终走上了中国化的道路。

The thesis puts emphasis on the simulation method of the secondary object and achieves the following accomplishments:1 Non-physical simulation method of trampolineWe can adopt two kinds of method on the secondary objectssuch as the trampolines.

本论文重点研究了次物体的模拟方法，并取得了如下研究成果： 1 提出了蹦床的非物理模拟方法对蹦床这类次物体的模拟传统上都采用物理方法。

Was also expressed that the city's public schools In addition to city-owned public school extracurricular, as well as their subordinates public schools and provincial public schools, the latter two are not the municipal financial burden, the proposed regulations open to the public school sports facilities in schools be limited to the financial burden of the municipal the city-run primary and secondary schools, secondary vocational and general colleges and universities.

还有意见认为市内公办学校除了市属公办学校外，还有部属公办学校和省属公办学校，后两者并不由市财政负担，建议规定向公众开放学校体育设施的学校限于由市财政负担的本市公办的中小学校、中职和普通高校。

The inflammatory infiltrate in the cutaneous lesions of secondary syphilis was investigated using immunohistochemical technique. Results: The TP-specific DNA was found in 10 of 24 (45.8％) lesions of secondary syphilis.

用巢式PCR方法对24例10％甲醛溶液固定、石蜡包埋的二期梅毒疹标本进行了梅毒螺旋体DNA检测；用免疫组化方法对二期梅毒皮损中的浸润细胞进行检测。

Name of secondary stress ,, A Summary of secondary stress simple ...

二次应力名称，，二次应力简单概说。。。。

At the same time and hope that through the investigation of primary and secondary school teachers can be found in the pressure of the main reasons for their career, with a view to grasp the primary and secondary school teachers occupational stress in China the latest progress in the status quo, in order to provide a theoretical reference for further study and learn from.

同时，也希望通过对中小学教师的调查可以找出其职业压力的主要原因，以期把握我国中小学教师职业压力现状问题的最新进展，为进一步研究提供理论参考和借鉴。

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。