摘要
介绍电能质量数据的二维图像表示方法,说明该二维图像的相关特点,分析小波消失矩、正则性、紧支性、对称性和正交性对电能质量数据压缩性能的影响。在此基础上运用小波相关理论构造9/11双正交小波,并将9/11小波与EZW编码联合用于电能质量谐波信号的二维数据压缩。最后通过仿真实验证明该方法的可行性。
This paper first introduces the two-dimensional image representation method for power quality data, illustrates the characteristics of the two-dimensional image, analyses the influence of vanishing moment, regularity properties, compact support, symmetry and orthogonally of different wavelets to data eompressionproperty. Based onwavelet theory the 9/11 biorthogonal waveletis constructed and used for data compression of two-dimensional harmonic signal power quality with EZW algorithm. Finally, experimental results demonstrate the feasibility of the method.
出处
《舰船科学技术》
北大核心
2014年第2期90-96,共7页
Ship Science and Technology
关键词
电能质量
二维数据压缩
小波变换
双正交小波构造
power quality
2 - dimensional data compression
wavelet transform
biorthogonal wavelet construction
