In this paper, the absolute stability of control systems with multi nonlinear feedback terms are studied. The sufficient and necessary conditions of absolute stability are obtained. Some applied sufficient conditions ...In this paper, the absolute stability of control systems with multi nonlinear feedback terms are studied. The sufficient and necessary conditions of absolute stability are obtained. Some applied sufficient conditions of absolute stability are given.展开更多
针对复杂工业生产过程具有高维度、多工况、非线性的特征以及扩散映射存在的新样本投影困难的问题,本文提出了一种基于可扩容式扩散映射和局部离群因子(expandable diffusion maps and local outlier factors, EDM-LOF)的工业过程故障...针对复杂工业生产过程具有高维度、多工况、非线性的特征以及扩散映射存在的新样本投影困难的问题,本文提出了一种基于可扩容式扩散映射和局部离群因子(expandable diffusion maps and local outlier factors, EDM-LOF)的工业过程故障检测方法.使用扩散映射方法提取训练样本的低维流形结构,构建局部投影矩阵将新样本投影至流形空间,并在流形空间中使用局部离群因子方法进行故障检测.将EDM-LOF应用于青霉素发酵过程进行故障检测,并与PCA、FD-kNN、LOF方法进行比较,结果表明EDM-LOF具有更高的故障检测性能,验证了该方法的有效性.展开更多
In this paper, the problenl of absohlte stability for general Lurie control systems with multi- nonlinear feedback terms is investigated. From the Lyapunov function approach. new necessary and sufficient conditious an...In this paper, the problenl of absohlte stability for general Lurie control systems with multi- nonlinear feedback terms is investigated. From the Lyapunov function approach. new necessary and sufficient conditious and some practical sufficient conditions of absolute stability are derived. which improve the absolute stability for the set. A numerical examplc illustrates the effectiveness of the proposed results.展开更多
文摘In this paper, the absolute stability of control systems with multi nonlinear feedback terms are studied. The sufficient and necessary conditions of absolute stability are obtained. Some applied sufficient conditions of absolute stability are given.
文摘针对复杂工业生产过程具有高维度、多工况、非线性的特征以及扩散映射存在的新样本投影困难的问题,本文提出了一种基于可扩容式扩散映射和局部离群因子(expandable diffusion maps and local outlier factors, EDM-LOF)的工业过程故障检测方法.使用扩散映射方法提取训练样本的低维流形结构,构建局部投影矩阵将新样本投影至流形空间,并在流形空间中使用局部离群因子方法进行故障检测.将EDM-LOF应用于青霉素发酵过程进行故障检测,并与PCA、FD-kNN、LOF方法进行比较,结果表明EDM-LOF具有更高的故障检测性能,验证了该方法的有效性.
基金The project is supported by the National Natural Science Foundation of China (No. 19871005)the Foundation of Doctoral Programme of the Educational Ministry of China (No. 1999000722)
文摘In this paper, the problenl of absohlte stability for general Lurie control systems with multi- nonlinear feedback terms is investigated. From the Lyapunov function approach. new necessary and sufficient conditious and some practical sufficient conditions of absolute stability are derived. which improve the absolute stability for the set. A numerical examplc illustrates the effectiveness of the proposed results.
