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2016 Seventh International Conference on Intelligent Control and Information Processing (ICICIP)最新文献

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Robust filtering for multirate nonlinear networked control systems 多速率非线性网络控制系统的鲁棒滤波
Tong Wang, Wenqiang Ji, Jianbin Qiu
In this paper, the filtering problem is studied for a class of networked multirate nonlinear systems, where not only the network-induced delays but also the packet dropouts are considered. The objective is to design the corresponding filter to guarantee that the estimation errors under the effect of stochastic disturbance are bounded. The filter is designed via the idea that the associated multirate nonlinear system can be expressed as the nonlinear system with mixed delays. Finally, the simulation study of continuous stirred tank reactor (CSTR) system in double-layer architecture further demonstrates the proposed method.
本文研究了一类网络多速率非线性系统的滤波问题,该问题不仅考虑了网络引起的时延,而且考虑了丢包。目的是设计相应的滤波器,以保证在随机干扰作用下的估计误差是有界的。该滤波器的设计思想是将相关的多速率非线性系统表示为具有混合延迟的非线性系统。最后,对双层结构的连续搅拌槽式反应器(CSTR)系统进行了仿真研究,进一步验证了所提出的方法。
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引用次数: 1
An area coverage control protocol based on probabilistic coverage for wireless sensor networks 基于概率覆盖的无线传感器网络区域覆盖控制协议
Ying Tian, Xiaoqian Yang, Yang Ou, G. You
Coverage control in high dense wireless sensor network is an important way to make the network more efficient, which can schedule the sensors in active or sleeping state at the right time on the precondition of maintaining the network coverage. Aiming to make the best of redundant coverage of the high dense network, an area control protocol based on probabilistic coverage model is designed. To simplify the area coverage judgment, the area coverage problem is transformed into the several points coverage judgment, an area judging rule is presented base on the previous work. And then, using the promoted judging rule, a node self-schedule scheme is designed, which can turn the sensor into active state or sleep according to the information received from its active neighbors. Comparing with other coverage control protocol, our promoted protocol can maintain the network coverage quality and prolong the network lifetime more efficiently.
在高密度无线传感器网络中,覆盖控制是提高网络效率的重要手段,它可以在保证网络覆盖的前提下,在适当的时间调度处于活动或休眠状态的传感器。为了充分利用高密度网络的冗余覆盖,设计了一种基于概率覆盖模型的区域控制协议。为简化区域覆盖判断,将区域覆盖问题转化为若干点覆盖判断,在前人工作的基础上提出了区域判断规则。然后,利用改进的判断规则,设计节点自调度方案,根据从活动邻居处接收到的信息,将传感器切换到活动状态或休眠状态。与其他覆盖控制协议相比,我们改进的协议能够更有效地保持网络覆盖质量和延长网络寿命。
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引用次数: 3
Nonlinear interval regression analysis based on spline fuzzy model with interval coefficients 基于区间系数样条模糊模型的非线性区间回归分析
Lili Cai, Degang Wang, Wenyan Song, Hongxing Li
Interval regression analysis is an effective method of handling uncertain and imprecise data. In this paper, a kind of spline fuzzy model is designed for modeling interval data. Spline function is chosen as the membership function, and the coefficients of this model are taken as interval-valued numbers. A target function based on approximation errors and specificity is proposed to improve the quality of estimated interval data. Accordingly, gradient descent algorithm is employed to tune these interval weights. Some numerical simulations are carried out to validate the effectiveness of the proposed spline interval regression model.
区间回归分析是处理不确定和不精确数据的有效方法。本文设计了一种用于区间数据建模的样条模糊模型。选取样条函数作为隶属函数,模型系数取区间数。为了提高区间估计数据的质量,提出了一种基于近似误差和特异性的目标函数。因此,采用梯度下降算法来调整这些区间权重。通过数值模拟验证了样条区间回归模型的有效性。
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引用次数: 0
Consensus for a class of discrete-time heterogeneous networked agents 一类离散时间异构网络智能体的一致性
Huanyu Zhao, Hao Shen
This paper studies the consensus problem for a class of discrete-time linear heterogeneous networked agents. The heterogeneous networked agents considered is converted into a equivalent error system by a model transformation. We analyze whether the original networked system can achieve consensus by analyzing whether the error system is stable. A sufficient condition for the heterogeneous networked agents to achieve consensus is obtained. The results obtained are based on matrix theory and algebraic graph theory. At the last section, we give an example to show the usefulness of the obtained results.
研究了一类离散时间线性异构网络智能体的一致性问题。通过模型转换,将所考虑的异构网络智能体转化为等效误差系统。我们通过分析误差系统是否稳定来分析原网络化系统是否能达成共识。得到了异构网络智能体达成共识的充分条件。所得结果基于矩阵理论和代数图理论。在最后一节,我们给出了一个例子来说明所得结果的实用性。
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引用次数: 0
A novel model predictive control strategy in modified PLS framework 一种基于改进PLS框架的模型预测控制策略
Tianyi Gao, Shen Yin
A data-driven model predictive control (MPC) in modified partial least squares (PLS) framework is proposed in this paper after a brief summary of MPC strategy in PLS framework. A theoretical comparison between data-driven MPC strategy in these two framework is presented, which demonstrates that MPC in modified PLS framework benefits in both computation complexity and robustness. The feature of modeling rapidly makes it possible to update the correlation model online. The reliability of the model is guaranteed by the model update strategy to a certain degree. Performance of the proposed control strategy is verified through simulations of a numerical example. It can be illuminated from the simulation that the proposed method performances well.
在对修正偏最小二乘框架下的数据驱动模型预测控制策略进行简要总结的基础上,提出了一种修正偏最小二乘框架下的数据驱动模型预测控制策略。对两种框架下的数据驱动MPC策略进行了理论比较,结果表明,改进PLS框架下的MPC策略在计算复杂度和鲁棒性方面都有显著提高。建模速度快的特点使得在线更新相关模型成为可能。模型更新策略在一定程度上保证了模型的可靠性。通过一个数值算例的仿真验证了所提控制策略的性能。仿真结果表明,该方法具有良好的性能。
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引用次数: 0
Evaluating the density parameter in density peak based clustering 基于密度峰的聚类中密度参数的评价
Jian Hou, Wei-Xue Liu
The density peak based clustering algorithm is a simple yet effective clustering approach. This algorithm firstly calculates the local density of each data and the distance to the nearest neighbor with higher density. Based on the assumption that cluster centers are density peaks and they are relatively far from each other, this algorithm isolates the candidates of cluster centers from the non-center data. After the cluster centers are identified, the other data are assigned labels equaling to those of their nearest neighbors with higher density. In this way the clustering can be accomplished efficiently and clusters of arbitrary shapes can be obtained. The key of the density peak based clustering algorithm lies in the density calculation method. In this paper we study the influence of the data amount used in density calculation on the clustering results of the density peak based algorithm. As a result, we arrive at some conclusions on the selection of the data amount, which can be useful in applying this algorithm in real tasks.
基于密度峰的聚类算法是一种简单而有效的聚类方法。该算法首先计算每个数据的局部密度和到密度较高的最近邻居的距离。该算法假设聚类中心为密度峰,且聚类中心之间相对较远,将候选聚类中心从非中心数据中分离出来。在识别出集群中心后,其他数据被分配到与其密度更高的最近邻居相同的标签。这种方法可以有效地完成聚类,得到任意形状的聚类。基于密度峰的聚类算法的关键在于密度计算方法。本文研究了密度计算中使用的数据量对基于密度峰值算法聚类结果的影响。最后得出了一些关于数据量选择的结论,对实际任务中的应用具有一定的指导意义。
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引用次数: 2
Study on support vector machine based quality prediction of complex mechatronic systems 基于支持向量机的复杂机电系统质量预测研究
Yao Cheng, Xin Gao, Tianyi Gao, Zelin Ren
Aimed to build a health monitoring scheme of complex mechatronic systems, a quality prediction on Tennessee Eastman (TE) process based on support vector machine (SVM) is proposed in this paper after a brief investigation on the regression ability of SVM. The SVM model is builded using the datasets generated by TE process simulation platform. Furthermore the prediction precision of SVM is testified using the simulation of TE process compared with other prediction methods. It indicates from the results that SVM is more beneficial according to the root mean square errors (RMSE) between the actual and the predicted data.
为了构建复杂机电系统的健康监测方案,在简要研究支持向量机(SVM)回归能力的基础上,提出了一种基于支持向量机(SVM)的田纳西州伊士曼(TE)过程质量预测方法。利用TE过程仿真平台生成的数据集建立支持向量机模型。通过对TE过程的仿真,对比其他预测方法,验证了支持向量机的预测精度。结果表明,从实际数据与预测数据的均方根误差(RMSE)来看,支持向量机更为有利。
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引用次数: 1
New H∞ filter design approach for time-delay fuzzy-model-based system under imperfect premise matching 不完全匹配条件下时滞模糊模型系统的H∞滤波器设计新方法
Li Li, Qianqian Ma, Hongwei Xia, G. Ma, Dali Zhang
The paper concerns the issue of H∞ fuzzy filter design for T-S fuzzy-model based system involving time-delay. In the light of the Lyapunov stability theory, improved stability criteria for the filtering system are developed, and corresponding H∞ fuzzy filter design approaches are proposed as well, all the derived results are given as the feasibility of LMIs. Besides, the novel imperfect premise matching methodology is adopted to derive the H∞ fuzzy filter, which allows the H∞ fuzzy filter and the T-S fuzzy model have distinct membership functions and different number of fuzzy rules, such design can provide larger design flexibility and better robustness property. Finally, two numerical examples are offered to clarify the validity and the superiority of the designed method.
本文研究了基于T-S模糊模型的时滞系统的H∞模糊滤波器设计问题。根据Lyapunov稳定性理论,提出了滤波系统的改进稳定性判据,并提出了相应的H∞模糊滤波器设计方法,所有推导结果均作为lmi的可行性给出。此外,采用新颖的不完全前提匹配方法推导H∞模糊滤波器,使得H∞模糊滤波器和T-S模糊模型具有不同的隶属函数和不同数量的模糊规则,这样的设计可以提供更大的设计灵活性和更好的鲁棒性。最后,通过两个算例验证了所设计方法的有效性和优越性。
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引用次数: 1
New results on stability and stabilization analyses for T-S fuzzy systems with distributed time-delay under imperfect premise matching 不完全匹配条件下分布时滞T-S模糊系统稳定性与镇定分析的新结果
Qianqian Ma, Li Li, Hongwei Xia, Mingyang Yang, G. Ma
This paper investigates stability and stabilization analyses issue for T-S fuzzy-model-based systems involving distributed time-delay. The novel imperfect premise matching methodology is employed to derive fuzzy controller, unlike conventional PDC method, this novel technique allows the designed fuzzy controller and the T-S fuzzy model to have distinct membership functions and number of rules, as a result, great flexibility and better robustness can be achieved. Moreover, with the introduction of one novel inequality which is tighter than other existing ones, relaxed LMI-based stability and stabilization criteria are obtained in term of the Lyapunov stability theory. Lastly, two numerical examples are offered to prove the valadity of the derived results.
本文研究了包含分布时滞的T-S模糊模型系统的稳定性及稳定性分析问题。采用新的不完全前提匹配方法推导模糊控制器,与传统的PDC方法不同,该方法使所设计的模糊控制器和T-S模糊模型具有不同的隶属函数和规则数,从而具有较大的灵活性和较好的鲁棒性。此外,通过引入一个比现有不等式更紧的不等式,利用Lyapunov稳定性理论得到了基于松弛lmi的稳定性和镇定判据。最后,通过两个数值算例验证了所得结果的有效性。
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引用次数: 3
Parallel spatial-domain liver segmentation of CT abdominal images CT腹部图像肝脏并行空域分割
Xu-Lei Yang, Chengan Guo
Liver segmentation in abdominal CT images is vital prior to liver disease diagnosis and computer-aided diagnosis. Since an abdominal CT image is some complex in which the pixels of the liver region and some other adjacent parts often distribute in the same value range, commonly used value-based segmentation methods have difficulty in dealing with this situation. In order to overcome this shortcoming, in this paper we present a spatial-domain segmentation method in which both the value information of the pixels and the spatial relationship between them are utilized in the segmentation process and meanwhile the spatial information, such as the area, boundary or location, of the target is extracted, thus the target region to be segmented can be distinguished from the other parts in same value range by use of the spatial information. Furthermore, a parallel algorithm is designed and implemented on GPU for improving the computation efficiency of the spatial-domain segmentation method. Experiment results obtained in the work confirm the effectiveness of the new segmentation algorithm.
在肝脏疾病诊断和计算机辅助诊断之前,腹部CT图像中的肝脏分割是至关重要的。由于腹部CT图像较为复杂,肝脏区域和其他邻近部分的像素往往分布在相同的值范围内,常用的基于值的分割方法难以处理这种情况。为了克服这一缺点,本文提出了一种空域分割方法,该方法在分割过程中既利用像素的值信息,又利用像素之间的空间关系,同时提取目标的面积、边界或位置等空间信息,从而利用空间信息将待分割的目标区域与同一值范围内的其他区域区分开来。为了提高空域分割方法的计算效率,在GPU上设计并实现了一种并行算法。工作中得到的实验结果证实了新分割算法的有效性。
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引用次数: 4
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2016 Seventh International Conference on Intelligent Control and Information Processing (ICICIP)
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