It is the first case to bring forward the issue of effects of wet compression on performances of compression system and model the compression system with wet compression , which will be a very important reference to boost application of wet compression 本文首次研究了湿压缩对压缩系统不稳定工作特性的影响，推导出了湿压缩系统稳定性分析的数学模型，为湿压缩的推广应用提供了重要的参考。
So the purpose of this project is not only research of a video compression / decompression system , but also in order to prove the value and potential of application of wavelet transform in the area of video compression and decompression 因此，本课题的主要目的不仅仅是研究开发出一种基于小波变换的视频压缩解压缩系统，更重要的是证明小波分析理论在视频压缩解压缩技术领域的巨大潜力。
The major pillars supporting this success include highly efficient illumination , compressed - air systems , new designs for heating and air conditioning , funneling heat losses from compressors into heating buildings , and detailed energy measurement and billing 成功的主因包括高效率照明设备、空气压缩系统、新设计的暖气和空调、减少热从压缩机进入建筑物时的损失，以及在能源计量和财务上精打细算。
We concluded that designing dsp and wavelet transform + spiht coding + mrme method based video compressing system is applicable . if real - time video data collection part is added , we can get a perfect real time video collecting and compressing system 在dsp上实现小波分解+ spiht编码+小波域内运动预测方法进行视频压缩具有较好的实用性，如果在系统中加入实时视频信号采集，可形成完整的视频采集压缩系统。
Furthermore , these two techniques are unified under the jpeg2000 frame , and a rs image compression system based on roi is designed . the experimental results show that the system can compress the rs with automatic roi coding , and the roi could be saved 使用该方法对本文设计的基于roi的遥感图象压缩系统的编码结果进行了评价,实验结果证明,该方法可较准确地评价roi编码结果,其评价结果与主观评价结果吻合。
This model can be used to reveal system transient responses during surge / rotating stall and effects of wet compression on these transient responses . simulation results show that wet compression can affect system performance because pressure output is higher and operating point is changed when wet compression is used 该模型和初步的仿真结果表明湿压缩对压缩系统的影响，表现为湿压缩（在消耗的压缩功相同的情况下）使压缩系统的运行点发生了改变。
Vb link with fortran language is realized and solved successfully . both program interfaces are friendly and convenient to operate . the post - stall behavior of three specific compression systems is analyzed by the application of the post - stall behavior simulation programs developed in this paper 以三种特定的压缩系统为研究对象，展示了这两种过失速性能模拟技术的实用性和有效性，单级压缩系统的过失速状态的数值模拟结果得到了实验结果的很好支持。
This paper introduces the origin of jpeg 2000 , jpeg 2000 itself and its application background as well as the still - image compression and coding system . jpeg 2000 standard is thoroughly analyzed in this paper . the features of jpeg 2000 such as region of interest coding , random access and progressive transmission are discussed in this paper Jpeg2000是目前国际上最新的静态图像压缩编码标准，本文分析了jpeg2000的由来和应用背景，并由静态图像编码压缩系统的背景知识出发，对jpeg2000标准进行了深入的研究，对该标准的新特性，包括roi编码、随机访问技术、渐进传输等进行了探讨。
Computer network and information science , digital video surveillance system is becoming the first choice in modem society , in which real - time and first - hand digital monitoring is provides after video frames are captured by video cameras installed in various locations , and then transformed to digital images , which can be effectively archived on digital media after compression 随着数字视音频压缩技术、计算机网络和信息科学的迅猛发展，数字化的视频监控系统成为时代的必然产物。数字视频监控系统就是通过设置在不同位置的摄像头采集数据，经过变换系统、视频压缩系统将数据汇集并处理，在监视器上显示并管理，为管理人员提供实时及直观的视觉资料。
Furthermore , the one - dimensional unsteady stage - by - stage model program is extended to study the recoverability of compression systems . the recoverability of three specific compression systems and some influence factors of recoverability are analyzed to make use of the program developed in this paper . they are verified for some experiment results on hand 本文进一步发展了一维非定常单元容积模型的应用分析范围，以三种特定的压缩系统为研究对象，研究了压缩系统的失速可恢复性及其影响因素，取得了已有实验结果的证实。
