This paper proposes a two - armed push - pull inverter , including its topologies , power distributions in every switching devices and modulation schemes . the major parameters such as thd and df of this vsi are analyzed . comparison study shows that the quality of two - armed push - pull vsi is better than those of square - wave vsi . and the switching loss is lower than that of pwm scheme at same time , especially used in wide frequency range . detailed calculating formulae and experimental results are presented 该文介绍了一种双臂推挽式逆变器,包括其电路拓扑、每个开关器件的功率分布和调制策略.分析了这种电压源逆变器的主要参数,如总谐波失真度( thd )和失真指数( df ) .比较研究表明,这种逆变器的质量明显优于方波逆变器,同时开关损耗明显低于pwm调制方式,特别适用于宽频范围.介绍了计算公式和实验结果
As well as , using vector operation substitute scale operation in order to improve compression rate condition on keeping on distortion . by tool of vc + + simulate the result of research . finally , compared with jpeg , we can draw on a condition : using dct table substitute dct calculate and using vector operation substitute scale operation which can attain that is high compression rate and steady distortion 其中，在dct变换中通过使用dct查询标的方式代替dct常规变化，达到减少计算机乘除运算次数的目的；量化过程中通过使用矢量量化代替标量量化，达到在保证最小失真度的前提下提高压缩比，并因此省略了jpeg压缩中的熵编码过程，简化了压缩过程，同时获得最佳压缩效率。
Based on the discussion of the nonlinearity of the vibrator , the mathematic model of ultra - low - frequency vibrator is established . then , on the basis of the ziegler - nichols pid controller , pid control parameters are modified according to the control requirements of object , and the computer simulation is done . finally , low - frequency feedback system is built up , which solves the problem of high distortion of the output of vibrator under ultra - low frequency 从分析标准振动台在超低频时的非线性因素入手，建立了超低频标准振动台的数学模型；然后在zieglernichols法设计pid的基础上，根据控制对象的性能要求修正了pid参数，并作了仿真研究；最后设计出低频反馈系统，解决了振动台超低频失真度较大的问题。
Block motion estimation using full search is computationally intensive , many fast algorithm have proposed to reduce the computation at the expense of less accuracy of motion estimation . in this paper , we present a new fast and efficient search algorithm for block motion estimation . the proposed algorithm is based on the ideas of predicted starting search point , subsampled block distortion measure , center - biased distribution of motion vector , multiple - candidate diamond search . from the experimental results , the proposed algorithm is superior to many other well - known fast algorithms in both quality performance and computational complexity 算法采用多步搜索方法，利用相邻块之间的运动相关性，选择反映当前块运动趋势的预测点作为初始搜索点用子采样块匹配失真度量来减少计算量利用运动矢量的中心倾向的分布特性，用多侯选点钻石形状搜索方法来提高运动估计的速度和准确性。
This part makes an analysis and comparison of the advantages and disadvantages of news with photographs and news with words respectively from the foliowng five aspects : the degrees of reliability and distortion , the speeds of the comprehension of words and photographs , the contents of the information the photographs and words of the same size convey , the multiplicity and singuldrity of the conveyed information , and the previous investment 从可信度或失真度的大小，理解文字与图片的快慢，同等印刷面积上图片与文字信息含量的多少，所传达信息的多元性与一元性，以及对比图片新闻和文字新闻各自的优势与不足，指出新闻图片的五点优势和文字新闻的五点优势，也指出了图片与文字的各自局限性。
Therefore , more and more academic attention has been paid to and converged at how to minimmize information distortion in the course of administrative communication , improve administrative efficiency , advance management expertise and save administrative cost in china from a new perspective 因此如何最大限度的降低行政沟通信息失真度,提高行政效率、提升管理水平、节约行政成本成为管理界、学术界关注的焦点。本论文的研究要点如下:第一,行政沟通的重要性其现实表现的不足。
Applying the self - organization theory including system approach and dissipative structure , combining the current situation of the securities markets , researching the legal misrepresentation - balancing regulations system , this article is to demonstrate the importance of the legal balancing mechanism and to modify specific regulations for the sake of amendment to the legal misrepresentation - balancing regulations system in the securities law system . it will help strengthen the relevance and manipulation of correlative regulations , and low the degree of information distortion caused by asymmetry 为完善证券法律体系中有关虚假陈述的法律制衡制度体系，本文运用包括系统论和耗散结构在内的自组织理论结合证券市场发展的现实状况，通过对虚假陈述法律制衡制度的研究，论证了制衡机制的重要性以及如何结合证券市场的发展现状完善相关制度，既可以增强相关制度之间的关联性和可操作性，又有利于降低信息不对称造成的失真度。
The exaltation of the intelligent degree therefore the gain lose the true degree to price of , therefore be used as the true box of high to speak , want to guarantee the restoring of tone color the degree and reappear the ability and then must lower some request intelligent degreeses . therefore say that , we can t think the box for quality certainly not goodly , but low and intelligent degree of high box of intelligent degree certain good 灵敏度的提高是以增加失真度为代价的，所以作为高保真音箱来讲，要保证音色的还原程度与再现能力就必须降低一些对灵敏度的要求。所以说我们不能认为灵敏度高的音箱音质一定不好，而低灵敏度的音箱一定就好。
Many fast block - based motion estimation algorithms have been proposed to reduce the computational complexity , for examples , three - step search , four - step search , new three - step search , etc . most of the fast block matching algorithms are based on the assumption that the block distortion measure increases monotonically as the check point moves away from the global minimum block distortion measure point 这些快速搜索算法大多基于块失真度量随着搜索点偏离最佳匹配点而单调增加的假定,但是这种假定往往只在局部范围成立,对于块失真度量是多极值分布的情况,搜索过程就可能陷入局部最优。
