A model made up of pulse compression grating pair with wavefront aberration is applied to calculate the effect of the wavefront aberration on pulse compression 理论分析结果表明:脉冲压缩光栅系统最大波像差不大于/ 4时,脉冲压缩比的最大变化率约为2 % 。
Main contents are listed as follows : 1 . survey the present status of motorcycle industry engine valve phase and compression ratio measuring technology in our country 本文主要包括如下的内容: 1 、目前我国摩托车行业发动机气门相位、压缩比测量技术现状的调研。
Mpeg - 1 layers describes the 3th layers digital audio algorithms of the mpeg organization , and it has high compression and excellent audio quality Mpeg1 - layer3是mpeg - 1国际标准音频( iso iec11172 )第三层编码解码算法,它具有压缩比例高,还原音质好等诸多优点。
Thus , 21mj of single pulse energy has been obtained . in the case of 10 % reflectivity , less than 3 . 7ns with 8 . 6 : 1 pulse - compression ratio has been observed 应用200 m光纤获得了21mj的四通放大输出能量并在能量反射率10的情况下获得了高达8 . 6倍的脉冲压缩比。
This paper presents the establish process of motorcycle valve phase and compression ratio measuring system during the development of motorcycle engine for the jia ling industry group 本文介绍了嘉陵工业集团摩托车发动机开发中,气门相位和压缩比测量系统的建立过程。
Secondly , mpeg4 technology and mpeg4 video compression card are use in this plan . thirdly , for video transmission , the size of the pictures are shortened to make the bit - rate smaller 三、采用mpeg4优化算法,在视频图像失真尽量小的情况下,达到对视频的更大的压缩比。
Two different measuring methods of compression ratio are compared and discussed for different applied limits , merits and defects of each are analyzed relevantly 本文还对两种不同测量压缩比的方法进行了比较研究,提出了两种方法的使用范围,对各自的优缺点进行了相应的分析。
The jacquin algorithm of fractal image coding is modified according to the modern optimization theory . the aim is to reduce the coding time 本文采用现代优化算法对分形图像压缩编码的简库恩算法进行改进,以期达到在不降低分形编码峰值信噪比和压缩比的前提下使编码时间减少的目的。
The i is an inside to compress , and not use the sport the repair , and provide the medium compression ratio . does not depend on because of the i in the other , therefore is a I帧是帧内压缩,不使用运动补偿,提供中等的压缩比。由于i帧不依赖于其它帧,所以是随机存取的入点,是基准帧。