The method directly executes wavelet packet decomposition of handwriting texture using wavelet packet basis db6 at scaling 3 in 2D space, then reconstructs the decomposition coefficient of 15 wavelet packet best basis which are took by Shannon Entropy Cost Function.
该方法直接在二维空间上由db6小波包基对笔迹纹理实施3尺度小波包分解，再在由以香农熵为代价函数提取得到的15个小波包最好基处对分解系数实行重构。
参考来源 - 一种基于小波包分析和神经网络的笔迹鉴别方法In the light of the features of radar signals in aerial defense weapon system, a chosen method of optimal wavelet package radix is brought forward on the basis of inheritance algorithm and improved genetic algorithm.
针对防空武器系统中雷达信号的特点,在三个分类准则(距离准则、散度准则和熵准则)和改进遗传算法的基础上,提出了最佳小波包基的选择方法,并且给出了实例验证。
参考来源 - 小波理论及其在防空武器系统中的应用·2,447,543篇论文数据，部分数据来源于NoteExpress
小波包变换能作为一种有效工具对信号特性进行精细分析，同时提供具有良好时频局部性的正交小波包基。
Wavelet packet transform is used as an efficient tool for precisely analyzing signal property, and provides orthogonal wavelet packet bases with better time frequency localization function.
使用小波包基函数作为子载波的好处是，它具有两条十分突出的正交性质：相邻(尺度)正交性和平移正交性。
The advantage of wavelet packet is because of its two important properties that depend on orthogonality: the scaling function and wavelet are orthogonal over both scale and translation.
结果表明：在故障检测前先采用最优小波包基方法对故障信号进行消噪，有利于提高汽轮机振动检测的准确性。
Measure test results show that signal denoising with BWPB prior to fault measurement is advantageous to enhancing the accuracy of steam turbine vibration fault detection.
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