entropy compression 中文意思是什麼
entropy compression
解釋
熵壓縮- entropy : n. 1. 【物理學】熵。2. 【無線電】平均信息量。
- 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。
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The high entropy of the real and imaginary parts of sar raw data makes lossless - coding compression techniques unfit for sar raw data. in chapter 4, some compression algorithms for sar raw data compression, such as baq, upq, bavq and wt - subbandcade are analyzed and discussed. an improved unrestricted polar quantizer ( upq ), which can enhance the performance of the quantizer is put forward
第四章分別對塊自適應量化（ baq ）演算法、非約束式極坐標量化（ upq ）演算法、塊自適應矢量量化（ bavq ）演算法和小波變換子帶編碼演算法進行了分析和研究，並詳細討論了這些演算法在工程實際中的應用。 -
Constant entropy compression
等熵壓縮 -
This program can work out some changes made by the operation of wet compression, such as the maximal mass of water spray, the temperature in the outlet of supercharger, and the consumed energy by the supercharger. in addition, this thesis gives the definition of efficiency of wet compression when the entropy of compressed air keeps constant, and it can be the standard for the study of wet compression
本文首先對增壓柴油機濕壓縮研究的主要部分? ?壓氣機，建立濕壓縮的數學模型，從理論上分析濕壓縮的最大噴水量，壓氣機出口溫度，壓氣機耗功等變化情況，並給出了等熵濕壓縮的定義，為濕壓縮研究建立了比較標準。 -
Appropriate data compression methods are needed to assure the random nature of the information source and to enlarge its entropy. in this thesis, first, we present the theory of sess system, then the acquisition method of sess system is discussed in detail, finally, a acquisition model of sess system is built and simulated in the awgn channel, in the raleigh fading channel and in multi - address interfere condition. the simulation results show the acquisition method of sess system can be just as reliable as the conventional dsss systems
本文首先對自編碼擴頻通信的基本原理，自編碼擴頻序列的產生方法及其產生的序列的特性進行了概述，然後詳細討論了直擴通信系統中的擴頻碼的捕獲跟蹤問題，根據自編碼擴頻通信的特點，設計了其捕獲跟蹤方案，並在加性高斯白噪聲通道、瑞利衰落通道和多址干擾情況下進行了模擬。 -
Secondly, on the basis of understanding the theory of the core compression arithmetic in jpeg2000, we deal with some image by the second wavelet transform and entropy arithmetic encoding used in jpeg2000
為此，我們在充分了解jpeg2000標準的壓縮、解壓縮原理的基礎上，採用jpeg2000標準的核心壓縮演算法，即第二代小波快速演算法以及算術編碼過程，對一些圖像進行了處理。 -
3 ) furtherly, an entropy encoder can compress the quantified values losslessly, and give a better overall compression result, too. in this paper, a new adaptive arithmetic coding scheme is given
3 ）在熵編碼階段，比較了huffman編碼和算術編碼的優缺點，最後選取了一種自適應的算術編碼方案。 -
They all are snr scalable, and, especially ebcot is resolution scalable. these properties are essential in transmission of image on internet. because the performance of an entropy coder can be significantly improved by having the coder dynamically adapt to the current " context ", context models also have widely been adopted in image compression
基於小波的圖像壓縮已成為圖像壓縮研究的主流，一些小波系數模型也隨之產生，如ezw 、 spiht和用於jpeg2000的ebcot ，這三種模型都具有snr可擴展性質，其中ebcot還具有解析度可擴展性質。 -
Various data compression techniques are studied and summarized in this paper, including the traditional and the newly developed techniques, then analyses the features of pipeline leak signals, such as the mechanism of production, entropy and correlation coefficient, are analyzed, and finally a universal and low - complex lossless compression algorithm is proposed and implemented in the pipeline leak detection and location system
本文研究和總結了國內外傳統和最新發展的各種數據壓縮技術，然後分析了管道泄漏信號的特徵，包括管道泄漏信號的產生機理、信息熵和相關系數，提出了一種適合於管道泄漏檢測定位系統的通用、低復雜度的無損壓縮演算法。 -
Text is a kind of very common resource in digital library, and lossless techniques play an important role in compressing text. starting from the shannon ' s entropy theory, we analyze the lossless compression algorithms, and implement arithmetic coding algorithm in c. in the experiments, we compare four different lossless compression algorithms by their performances such as compression rate, compression rate tendency with the length of data, stability, and complexity, using 35 groups data series with 4 different length
本文從信息論中shannon熵定理出發，對無損壓縮技術進行系統地分析，用c語言實現了其中的算術編碼演算法，並用它對35組、四種不同長度數據序列進行了壓縮，給出了實驗結果，然後從壓縮比、壓縮比隨字元串長度的變換趨勢、演算法穩定性和演算法復雜性等四個方面對其與其它三種壓縮演算法lzw 、 lz77 、 rle進行了分析與比較。 -
Image compression with visual entropy - based segmentation
一種基於視覺熵的圖像分割壓縮方法
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