Fluctuation evaluation is an important task in promoting the accommodation of photovoltaic (PV) power generation. This paper proposes an evaluation method to quantify the power fluctuation of PV plants. This consists ...Fluctuation evaluation is an important task in promoting the accommodation of photovoltaic (PV) power generation. This paper proposes an evaluation method to quantify the power fluctuation of PV plants. This consists of an index system and a ranking method based on the RankBoost algorithm. Eleven indices are devised and included in the index system to fully cover diverse fluctuation features. By handling missing and invalid data effectively, the ranking method fuses multiple indices automatically and provides a systematic and comprehensive comparison of power fluctuation. Simulation results based on power data from six PV plants indicate that the evaluation list obtained by the RankBoost ranking method is better represented and more comprehensive than that derived by the equal weight method.展开更多
为研究数字电视节目推荐系统不同统计算法的性能,提出利用Rankboost排序算法、Bayes统计算法和简单统计算法三种基于统计模型的算法实现数字电视用户特征的提取与节目推荐。应用实际数字电视运营平台20名用户的测试数据表明,Rankboost...为研究数字电视节目推荐系统不同统计算法的性能,提出利用Rankboost排序算法、Bayes统计算法和简单统计算法三种基于统计模型的算法实现数字电视用户特征的提取与节目推荐。应用实际数字电视运营平台20名用户的测试数据表明,Rankboost算法、Bayes统计算法、简单统计算法排序的AUC(Area Under Curve)值分别为0.732、0.6222和0.6058。分析及测试表明,Rankboost算法因考虑了多重特征在排序中的不同作用,因此在数字电视节目推荐中具有较高的推荐性能。展开更多
基金supported by National Key R&D Program of China(Technology and application of wind power/photovoltaic power prediction for promoting renewable energy consumption,2018YFB0904200)eponymous Complement S&T Program of State Grid Corporation of China(SGLNDKOOKJJS1800266).
文摘Fluctuation evaluation is an important task in promoting the accommodation of photovoltaic (PV) power generation. This paper proposes an evaluation method to quantify the power fluctuation of PV plants. This consists of an index system and a ranking method based on the RankBoost algorithm. Eleven indices are devised and included in the index system to fully cover diverse fluctuation features. By handling missing and invalid data effectively, the ranking method fuses multiple indices automatically and provides a systematic and comprehensive comparison of power fluctuation. Simulation results based on power data from six PV plants indicate that the evaluation list obtained by the RankBoost ranking method is better represented and more comprehensive than that derived by the equal weight method.
文摘为研究数字电视节目推荐系统不同统计算法的性能,提出利用Rankboost排序算法、Bayes统计算法和简单统计算法三种基于统计模型的算法实现数字电视用户特征的提取与节目推荐。应用实际数字电视运营平台20名用户的测试数据表明,Rankboost算法、Bayes统计算法、简单统计算法排序的AUC(Area Under Curve)值分别为0.732、0.6222和0.6058。分析及测试表明,Rankboost算法因考虑了多重特征在排序中的不同作用,因此在数字电视节目推荐中具有较高的推荐性能。
