Z-I关系最优化处理法改进研究

Study on modification to optimization method of Z-I relationship

通过对在雷达—雨量计联合估测区域降水量研究中广泛使用的Z-I关系最优化处理法进行深入分析发现,使用该处理方法存在两个问题,一个是其判别函数的推理基础薄弱,需对该判别函数的科学合理性进一步探讨;另一个是该处理方法所提供的寻找判别函数达到最小的方法有必要进行改进,否则将对最小值点的精准确定有一定影响。针对上述两个问题,本文提出了Z-I关系最优化处理法的衡量标准,建立了新型的判别函数,同时提出了寻找新型判别函数达到最小值的改进计算方法—变步长循环计算法。

Through deeply analysis towards an optimization method of Z-I relationship which was prevailing in the aspect of precipitation-measuring field of weather radar,two main problems were discovered.One was weak basic inference of the CTF,so its convincing was to be discussed further;the other was the way minimizing the CTF, which was not reasonable.Confronted with the problems uncovered above,this paper proposed brand-new criteria, namely,an optimization method.Meanwhile,a completely different CTF and an improved algorithm were brought up,which was named ＆quot;Various-step Circulating Calculation＆quot;,approaching the minimum of the CTF additionally.