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Application of Evolutionary Computation for Identification of Parameters of Sky Luminance Distributions

机译:进化计算在识别天空亮度分布参数中的应用

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The International Commission on Illumination has adopted a set of fifteen standard sky luminance distributions (SSLD). One of our previous papers uses a least squares method to sort sky luminance measurements from a station located north of Bangkok into fifteen slots, each corresponding to each type of SSLD, to appraise the statistics of occurrence of each sky type at the location. The paper also uses Kittler's method (Kittler; and others, 1997) to prepare paired values from the measurements sorted and obtains parameter values of the gradation function and those of the indicatrix function separately from measurements in each slot. This paper applies evolutionary computation to obtain a set of parameter values for both gradation Junction and indcatrix function simultaneously under least squares criterion. This method enables all measurements in each slot to be used. The resulting luminance distribution function thus obtained for each sky type possesses lower bias error and lower mean square error than those of the corresponding type of SSLD when both are evaluated against measurements.
机译:国际照明委员会采用了一套十五种标准天空亮度分布(SSLD)。我们之前的一篇论文使用最小二乘法将曼谷北部某站点的天空亮度测量结果分为15个时隙,每个时隙对应于每种SSLD类型,以评估该位置每种天空类型的发生统计信息。本文还使用Kittler方法(Kittler;等,1997)从排序的测量值中准备配对值,并分别从每个时隙的测量值中获得灰度函数和indicatrix函数的参数值。本文应用进化计算方法,以最小二乘法为标准,同时获得了灰度交界处和indicatrix函数的一组参数值。这种方法可以使用每个插槽中的所有测量值。因此,针对每种天空类型获得的最终亮度分布函数比相应的SSLD类型具有更低的偏差误差和更低的均方误差,两者均针对测量进行评估。

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