小波变换方法评价曲线的分形特征

应用小波变换对Kiesswetter工线和3种方法生成的分数维布朗运动（FBm）进行了分析，验证了该方法计算分形维数具有较高的精度。在宽广的分形维数范围内，与其他7种计算方法比较表明，小波变换方法的精确性和一致性都最好。小波变换为进一步分辨确定性信号、分形特征的信号或完全随机性的信号提供了一种有效工具，为评价精糙表面形貌的分形特征提供了前提条件。

Comparison of salt titration and potentiometric titration methods for the determination of zero point of charge

the salt ritration metod was evaluated as a method to determine zpc in comparison with the potentiometric titration method for 26 soil with variable charge clays,i.e.,Oxisols and Ultisols from Thailand and Andisols from Japan. In addition to the determination of ST-pH0 as the zero point of charge, a calculation procedure was adopted here in order to acquire more information from the titration curve . fuithermore, for the purpose of cross-checking of zpc determined by the pt method, the st procedure was successively applied to the samples analyzed by the pt method.