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Later, it makes some comparison with four kinds of modulation technique, and finally, it implements the three-level PWM switching power amplifier with the PWM technique. The power of the amplifier is 2kVA, and the frequency bandwidth is 10～3kHz. In the thesis, the author designs and makes the hardwares of the switching power amplifier. The hardwares contain power inverter rank circuit, control system circuit based on DSP, drive and isolation circuit, and protective circuit. The thesis also analyses the potential safety problems and put forward some solutions for the problems. Furthermore, the thesis accomplishes the software design of the control system, and successfully debugs it. The methods of designing higher power ampilfier are also discussed in the thesis. It analyses the feasibility of the methods, outlines the way of how to design higher power switching power amplifier, and does some experiments with the method of switches-parallelling.

根据电动振动试验系统对开关功放的要求，提出了以电感电流瞬时值控制技术为基础的三电平脉宽调制开关功放的设计方案，并通过系统仿真进行了原理性论证；然后设计并制作了开关功放的硬件，包括功率转换电路，基于DSP的控制电路，驱动、隔离电路以及保护电路；针对开关功放数学模型不易得出的特点，细致分析了模糊自适应PID控制方法，在此基础上编写了控制程序；研制出一台功率为2kVA，通频带为10～3kHz的三电平脉宽调制开关功放；论文中还探讨了实现大功率开关功放的方法，分析了各种方法的可行性，给出了实现大功率开关功放的思路，并进行了并联开关管实现大功率开关功放的实验。

The technique path of the research is : on the rules of obtainable of data, specialty, sensitivity, representative, characteristic of full-scale and perspicuity of indexes, used external statistic way which includes ways of a coefficient of variation, case cluster and relation analysis, variable cluster and subjective Delphi, sift from initial index system, and finally get a complete evaluation index system for labor relation which meet the external technique requirement and subjective theoretic and practical analysis.

本论文研究的技术路径为：以指标资料的可获得性，指标的特异性、敏感性、代表性、全面性和简明性为原则，运用包括变异系数法、样本聚类和相关分析法、指标聚类法等客观的数理统计方法和主观的德尔菲法，对初始的指标体系进行了筛选，最终确定了满足客观技术要求和主观理论经验的完整的劳动关系评价指标体系。

Then, designed reasonable grouting construction scheme combined with practical situation of the project. Also, studied key techniques about grouting in loosen rock mass, such as drilling technique, collaring sealing technique and so on.

接着，根据工程实际情况，设计出合理的注浆施工方案；并对松散体注浆工艺中的成孔技术、孔口封堵技术等关键技术问题进行了研究，这些问题的解决保证了松散体注浆工程的顺利进行。

The percutaneous balloon mitral valvuloplasty was performed in the patient with single thickened tendinous cordae.The valvular closed commissurotomy was performed in the patient with thickened non-calcified tendinous cordae.The ATC stereoscopic images that revealed by dynamic 3-D reconstruction technique could be not acquired in two-dimensional image technique.

结果：本组瓣膜病患者，有两组腱索增粗并钙化者及腱索稀疏与断裂者均行瓣膜置换术，仅单组腱索增粗者行瓣膜球囊扩张术，两组腱索增粗而无钙化者行瓣膜闭式分离术，动态三维重建技术展示了二维显像所不能获得的房室瓣腱索的立体图像。

In this paper, a kind of automatic parallel conversion technique is given. The serial Java program is transformed to parallel program utilizing the multithreading machanism and testing technique of commutativity operations.

提出一种Java程序的自动并行转换技术，并充分利用Java语言本身提供的多线程机制，通过操作冲突性检测等方法将串行化的Java程序自动转化成并行化程序。

The thought of combination of object oriented technique and complier construction technique is deeply used in the procedure of implementing.

在具体实现过程中，充分利用了面向对象技术与编译技术相结合的思想。

The drive system adopts 5 independent drive mechanisms and a common drive mechanism, therefore both the working space and cost are reduced. In the design of the control system, the hydraulic servo technique and modern control technique are applied. The hydraulic stepless variable speed device adopts compound open and closed static pressure drive pattern, ensuring the smoothness of the drive.

其中的传动方案设计中采用5个独立的传动系统和1个共用的传动系统，既节约了空间和成本，又满足了技术要求；控制系统设计中运用了液压伺服技术和现代控制理论技术；液压无级变速装置采用闭式和开式静压传动系统相结合的方式，传动系统平稳，波动小。

Chapter 4 combines quasi-square-wave converter technique and Nth order QRC technique, and develops a general concept of Nth (N≥2) order QSWC.

第四章结合准方波技术和N阶准谐振变换器技术，发展成N阶准方波变换器。

Arcangelo Corelli is remembered as influential for his achievements on the other side of musical technique- as a violinist who organized violin technique and pedagogy-and in purely instrumental music, particularly his advocacy and development of the concerto grosso.

克莱里则因为他在音乐技法上另一方面成就的影响力而被人们记得--他是一位将小提琴技巧与教学法组织起来的小提琴音乐家；而在纯器乐音乐方面，则尤其是他对于他对大协奏曲的支持和发展。

The confidence interval method and the confidence region method for the error analysis of extracted parameters are studied. The algorithm implementation of confidence analysis based on the AD technique and OOP technique is presented, which can distinguish the redundancy and the correlation of extracted parameters.

研究了模型参数误差分析的置信区间法和置信区域法，提出了置信分析在AD技术及面向对象设计基础上的算法实现，可以很好地实现了对模型参数的冗余或相关的识别。

Mr. Putin said there were signs of genocide against the Ossetian people.

普京说，有迹象表明对南奥塞梯人进行了种族清洗。

What I'm trying to say, Tristan is...

特瑞斯坦。我想说的是。