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In order to solve the application problem of conduction heating machining, this project investigates some problems, such as dynamic characteristics of heating power, features of circuit current and voltage, arc discharge states and so on. It also studies control characteristics of Uni-phase or Tri-phase Direct Current Power Supply and Inverse Switch Power Supply. A High Frequency Inverse Switch Commutate Power Supply is developed.

为了解决导电加热切削的应用问题，从加热电源的动态性能和回路的电流、电压特性及电弧放电状态等方面进行研究，分析比较了单、三相交直流电源和逆变开关电源的特点和控制特性，研制了高频逆变开关整流电源。

Theorem 1 If the power series is convergent at ,then for any that ,the power series absolutely converges at point ;if the power series is divergent at ,then for any that ,the power series diverges at point .

定理1 如果级数当时收敛，则适当不等式的一切使这幂级数绝对收敛；反之，如果级数当时发散，则适合不等式的一切使这幂级数发散。

And this paper assumes that resisting power is accordwith parabola, gets all arch as basic configuration, gets formulation from the condition that therelative corner , horizontal displacement and vertical displacement of vault section iszero,adds deformation condition of maximum resisting power and zero resisting power, solvesequation group to get the internal force of lining . And lining internal force computing methodunder bias load based on assumed resisting power method is formulized.

本文假定弹性抗力按二次抛物线分布，取全拱为基本结构，由拱顶截面的相对转角、相对水平位移和相对垂直位移为零的条件列出变形协调方程，再增加最大弹性抗力处的变形协调条件和弹性抗力为零处径向位移为零的变形协调条件，解方程组求解得出衬砌结构的弹性抗力分布及内力。

In Two-Transistor Flyback Converter circuit, a power semiconductor device in Flyback Converting circuit has been replaced by two power semiconductor devices which parallel connected with an ultra-fast diode with soft recovery characteristics. Two-Transistor Flyback Converter can reduce greatly the switching stress of the power switch and does not need to degausser, suitable for high input voltage Switching Power Supply.

反激变换是从Buck-Boost变换演变而来的，将反激变换电路中的单个功率开关管用两个替代，并在每个功率开关管上并联一十箝啦的快恢复二极管而形成的双晶体管反激变换电路，能大大降低功率开关管承受的开关应力，且不需要消磁电路，非常适用于高输入电压的开关电源。

A forward power saturation protecting method for CDMA communication system and its power controller are disclosed. Said controller is composed of an emitting power control unit, a transceiver and a TPC instruction counter for base station, or a transceiver, a received signal quality determinator and a TPC instruction generator for mobile station. It can ensure that the limited power is distributed to the user whose communication quality is very poor and the communication channel quality can be quickly compensated.

本发明公开了一种码分多址通讯系统前向功率饱和保护方法及功率控制装置，其特点是，控制装置包括：基站发射功率控制单元，基站收发信机，TPC指令计数器；移动台部分有收发信机，接收信号质量检测器，TPC指令产生器；通过饱和判决过程和饱和保护过程，保证将有限的功率分配给通信质量真正恶化的用户，并可迅速补偿用户由于深衰落而导致的信道质量的严重恶化；同时，该方法能平衡功率在用户之间的均匀分配，对急需提升功率的用户做出及时的反应。

Load important is not the nature of blackouts, in the actual operation of a dual Power supply when a power failure, while another power should not be damaged, and conversion to electricity, the management of an important load, to reduce Even in matters of unexpected losses, does not affect its Power supply situation.

重要负荷的性质是不能停电，因此在实际运行中采用双电源供电，当一个电源发生故障时，另一个电源不应同时受到损坏，且能够转换供电，对重要负荷的管理，能够减少甚至在突发事情中的损失，不影响其供电情况。

This article briefly introduced medium and small types of biomass gasification power generation technology, 1000kW stalk and paddy power plant engineering and its economic benefit analysis; it illustrated that medium and small types of biomass gasification power generation has huge developing potential and marketing competence in our country; and it analyzed the importance of medium and small types of biomass gasification power station in rural electrization

本文简要介绍了中小型生物质能气化发电技术、1000kW秸秆和稻壳发电厂工程及其效益分析；指出中小型生物质能发电在我国具有很大的发展潜力和市场竞争力；分析了中小型生物质能发电厂对实现农村电气化的重要作用。

Uses MATLAB software to carry on the computation to 6×4 the contractor power efficiency,discovers automobile each related parameter to the power efficient influence rule,determined the influence power efficient various essential parameter,through adjusts each kind of correlation disposition to achieve improves the entire vehicle power efficient goal.

采用MATLAB软件对6×4重型牵引车的动力性经济性进行了计算，确定影响动力性经济性的各关键参数，通过调整各种相关配置达到改善整车动力性经济性的目的，并通过整车道路试验验证计算结果，采取优化措施改善整车的动力性经济性。

He thought that not only the central power, but also the village power was controlled by laborers, which caused the Taiping Heavenly Kingdom to be a revolutionary regime, and that the village power had feudality to some extend, and the peasantry was a double class, thus the central power was with feudality to some extend.

他认为，除了中央政权，乡官政权也基本上掌握在劳动群众手里，因而太平天国是农民革命政权，但是，乡官政权带有一定的封建性，农民阶级带有双重性质，使得太平天国政权也带有一定的封建性。

It is mainly divided into five parts: the emergence of soft power theory in the field of international relations, the definition and the components of soft power, current situations and existing problems of China's soft power in international relations, attentive suggestions to China's soft power construction in the 21st century and the conclusion of this paper.

论文主要分为五部分：第一，国际关系中软实力理论的兴起；第二，国家对外软实力的概念和构成；第三，国际关系中的中国对外软实力的现状和存在的问题；第四，对于21世纪中国软实力建设的若干建议以及结论。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。