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中文摘要：
提出了基于小波变换的湍流积分尺度计算方法，避免了高频分量自相关函数振荡引起的积分尺度计算误差，并且能够细致地反映不同频率成分的小波分量对积分尺度的贡献。北京气象塔湍流积分尺度的计算结果表明，积分尺度的离散型很大，属于正偏斜分布。为了得到合理的积分尺度的统计结果，选取发生概率较大的积分尺度，舍弃积分尺度的奇异值。在积分尺度剖面拟合的基础上，提出了适用于北京城区的湍流积分尺度剖面的建议公式，并且比较了建议公式与各国规范规定的积分尺度剖面公式的异同。
英文摘要：
Based on the wavelet transform, an innovative method of calculating the turbulent integral length is presented, in which the errors of the integral length caused by the oscillating correlation of the higher frequency components are depressed. The contributions of the different wavelet components with different frequencies can be described in detail. The investigated re- suits of the turbulent integral length at the Beijing Meterological Tower show that the integral length scales are distributed scat- tered and that they are postive skewed. In order to obtain the reasonable results of the integral length scales, the integral length scales of the large probability occurred are remained while the singular integral length scales are discarded. A profile formula o{ the integral length scales for Beijing city is proposed after the fitted expression is found and then the comparison between the proposed formula and the formulas of the integral length scales in different codes.
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