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反馈精英鲸鱼优化算法优化LSSVM的热耗率软测量建模 被引量:5
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作者 左智科 陈国彬 +2 位作者 刘超 牛培峰 李一龙 《计量学报》 CSCD 北大核心 2019年第2期259-265,共7页
提出一种基于反馈精英鲸鱼优化算法(FEWOA)和最小二乘支持向量机(LSSVM)的综合建模方法。首先,针对鲸鱼优化算法(WOA)寻优精度低的问题,提出了反馈精英WOA算法,通过精英策略对当前最优解进行变异操作以避免算法陷入局部最优解;同时,在... 提出一种基于反馈精英鲸鱼优化算法(FEWOA)和最小二乘支持向量机(LSSVM)的综合建模方法。首先,针对鲸鱼优化算法(WOA)寻优精度低的问题,提出了反馈精英WOA算法,通过精英策略对当前最优解进行变异操作以避免算法陷入局部最优解;同时,在鲸鱼位置更新后期增加反馈阶段,提高算法的全局搜索能力。数值仿真实验验证了FEWOA算法的优越性。在此基础上,提出了基于FEWOA优化LSSVM的热耗率软测量模型。最后采用某汽轮机组现场收集的运行数据建立汽轮机热耗率预测模型,将FEWOA-LSSVM模型预测结果与其它模型预测结果相比较,结果表明,FEWOA-LSSVM预测模型更能准确地预测汽轮机的热耗率。 展开更多
关键词 计量学 热耗率 汽轮机 鲸鱼优化算法 最小二乘支持向量机 反馈精英
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The Effect of Different Types of Corrective Feedback on L2 Writing Accuracy of college students
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作者 Li Deng 《International Journal of Technology Management》 2014年第6期73-75,共3页
Since the process writing was raised in the L2 writing in 1970s, the feedback has been an important part of teaching. A range of researchers have investigated the effect of different types of error feedback to find wh... Since the process writing was raised in the L2 writing in 1970s, the feedback has been an important part of teaching. A range of researchers have investigated the effect of different types of error feedback to find whether the feedback can help L2 writers improve the accuracy of their writing. Similar to the previously discussed question, they have also reached rather controversial conclusions. Most often, these studies have categorized corrective feedback as either direct or indirect. To explore the effects of corrective feedback in L2 writing, the paper investigated the types of feedback given to 30 college students of Tianhe College in Guangdong province. The study improved that correction feedback can improve accuracy in student writing. 展开更多
关键词 FEEDBACK corrective feedback L2 writing ACCURACY
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