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A Bit-level Text Compression Scheme Based on the ACW Algorithm 认领 引用 被引量:2
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作者 Hussein Al-Bahadili Shakir M. Hussain 《International Journal of Automation and computing》 2010年第1期123-131,共9页
This paper presents a description and performance evaluation of a new bit-level, lossless, adaptive, and asymmetric data compression scheme that is based on the adaptive character wordlength (ACW(n)) algorithm. Th... This paper presents a description and performance evaluation of a new bit-level, lossless, adaptive, and asymmetric data compression scheme that is based on the adaptive character wordlength (ACW(n)) algorithm. The proposed scheme enhances the compression ratio of the ACW(n) algorithm by dividing the binary sequence into a number of subsequences (s), each of them satisfying the condition that the number of decimal values (d) of the n-bit length characters is equal to or less than 256. Therefore, the new scheme is referred to as ACW(n, s), where n is the adaptive character wordlength and s is the number of subsequences. The new scheme was used to compress a number of text files from standard corpora. The obtained results demonstrate that the ACW(n, s) scheme achieves higher compression ratio than many widely used compression algorithms and it achieves a competitive performance compared to state-of-the-art compression tools. 展开更多
关键词 Data compression bit-level text compression ACW(n) algorithm Huffman coding adaptive coding
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面向数字化工艺设计的MBD模型轻量化技术研究 认领 引用 被引量:1
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作者 李辉 郑炜 +2 位作者 刘琦 邓亚东 崔海华 《机械制造与自动化》 2025年第1期143-145,157,共3页
由于复杂三维产品模型中,零部件产品模型数量庞大,层次结构深,结构关系复杂,显示速度慢,不利于工艺设计过程中对模型的浏览和引用。通过对三维数字化工艺设计模型的研究,对MBD模型的构建进行定义,采用自适应哈夫曼无损压缩算法对三维模... 由于复杂三维产品模型中,零部件产品模型数量庞大,层次结构深,结构关系复杂,显示速度慢,不利于工艺设计过程中对模型的浏览和引用。通过对三维数字化工艺设计模型的研究,对MBD模型的构建进行定义,采用自适应哈夫曼无损压缩算法对三维模型的数据信息进行压缩处理以达到MBD模型的轻量化,使数据占用内存空间小、传输快,适应数字化工艺设计应用的要求。 展开更多
关键词 MBD技术 自适应哈夫曼无损压缩算法 MBD模型轻量化
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