BOD降解耗氧系数K_1估算方法的程序实现

Program Implementation on Estimating Method of the Degradation of Oxygen Consumption Coefficient K_1

对BOD实验室测定值估算降解耗氧系数K_1的两种方法最小二乘法和单变量求极值法进行了程序实现,并通过实例进行了验证。结果表明:两个程序均可以完成降解耗氧系数K_1的估算,并讨论了最小二乘法不同初值k对结果的影响,k在一定的范围内,可以得出正确的结果,在这个范围之外则结果无效。采用最小二乘法进行降解系数推求时,初值k选定为0.5d-1结果较为合理,这两种方法对初值的要求不同,单变量极值法的0.618法,对于初值区间的选定需要进一步分析研究。

Two methods of estimating the oxygen consumption coefficient K1 in the BOD laboratory, the least square method and the single variable extreme value method are to be implemented and tested by the actual example. The results show both procedures can complete the estimation of the degradation oxygen consumption coefficient KI and discuss the effect of the least squares initial value k on the results. K In a certain range, the correct result can be obtained, and the result is invalid out- side this range The When the least squares method is used to derive the degradation coefficient, the initial value k is chosen to be 0.Sd-1 The two methods have different requirements on the initial value. The 0.618 method of the univariate extreme value method is chosen for the initial value interval. Need to further analysis of the study.