compression tool 中文意思是什麼

compression tool 解釋
壓塑模具
  • compression : n. 1. 壓縮；壓緊；濃縮，緊縮。2. 加壓；壓抑。3. （表現的）簡練。4. 應壓試驗。
  • tool : n 1 工具，用具，器具；【機械工程】刀具；工具母機 （＝machine tool）。2 爪牙，傀儡，走狗；〈美俚〉...
  1. In this thesis, we subsequently introduce the basic concepts of wavelet transform, especially the pyramidal algorithm and its fast realization - lifting scheme ; this scheme can decrease the time and space complexity of wavelet transform greatly. wavelet transform, the most perfect mathematical tool of signal processing theory, makes great success in the field of data compression. ezw and spiht are the milestones of wavelet image coding on the noiseless channels, and jpeg2000 adopts the ebcot algorithm

    嵌入式零樹小波編碼（ embeddedzerotreewavelets ）和多級樹集合分裂演算法（ setpartitioninginhierarchicaltrees ）都是迄今為止最為優秀的理想通道情形下的小波編碼方案：而jpeg2000靜態圖像壓縮國際標準採用的是嵌入式碼流優化截斷塊式編碼演算法（ embeddedblockcodingwithoptimizedtruncationoftheembeddedbit - streams ） 。
  2. Continuous wavelet transform ( cwt ) is the strong tool to analysis the non - steady signals, also it ' s algorithm is more suitable for data compression than that of discrete wavelet transform ( dwt )

    而連續小波變換（ cwt ）是分析非平穩信號的有力工具，且其演算法在數據壓縮等方面的性能優于離散小波變換。
  3. 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變換中通過使用dct查詢標的方式代替dct常規變化，達到減少計算機乘除運算次數的目的；量化過程中通過使用矢量量化代替標量量化，達到在保證最小失真度的前提下提高壓縮比，並因此省略了jpeg壓縮中的熵編碼過程，簡化了壓縮過程，同時獲得最佳壓縮效率。
  4. The validation of the programs is verified by the good agreement between the simulation results and experimental results in the single - stage compression system. it is also verified that only a qualitative analysis can be obtained using the one - dimensional unsteady lumped model ; but the one - dimensional unsteady stageby - stage model is more suitable for actual compressor operating conditions and can serve as an effective analytic tool for studying the post - stall behavior and improving recoverability of compression systems

    判明了一維非定常總體模型只能定性的分析壓縮系統的過失速性能，在定量的分析上存在著一定的局限性；而一維非定常單元容積模型更能反映壓縮系統實際情況，從而為研究壓縮系統的過失速性能和改善壓縮系統的失速可恢復性提供了有力的工具。
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