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

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On stabilization of a class of nonlinear systems with quantized feedback 一类具有量化反馈的非线性系统的镇定问题
Chuang Zheng, Lin Li, Chanying Li
In this paper, we study the input-to-state stabilization for a class of nonlinear systems with completely unknown disturbances. If the growth rate of the nonlinear system is slower than linearity, we show that the system is stable by a feedback controller based on an adjustable parameter quantizer. Especially, when the systems are linear, the systems under consideration degenerates to the stablizable systems in the conventional sense.
本文研究了一类具有完全未知扰动的非线性系统的输入-状态镇定问题。如果非线性系统的增长速度比线性系统慢,我们通过基于可调参数量化器的反馈控制器来证明系统是稳定的。特别是当系统为线性时,所考虑的系统退化为传统意义上的可稳系统。
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引用次数: 0
Support Vector Machine-recursive feature elimination for the diagnosis of Parkinson disease based on speech analysis 基于语音分析的帕金森病诊断支持向量机递归特征消除
Hengbo Ma, Tianyu Tan, Hongpeng Zhou, Tianyi Gao
Parkinson disease has become a serious problem in the old people. There is no precise method to diagnosis Parkinson disease now. Considering the significance and difficulty of recognizing the Parkinson disease, the measurement of samples' voices is regard as one of the best non-invasive ways to find the real patient. Support Vector Machine is one of the most effective tools to classify in machine learning, and it has been applied successfully in many areas. In this paper, we implement the SVM-recursive feature elimination which has not been used before for selecting the subset including the most important features for classification from the original features. We also implement SVM with PCA for selecting the principle components for diagnosis PD set with 22 features in order to compare. At last, we discuss the relationship between SVM-RFE and SVM with PCA specially in the experiment. The experiment illustrates that the SVM-RFE has the better performance than other methods in general.
帕金森病已成为老年人的严重问题。目前还没有精确的诊断帕金森病的方法。考虑到识别帕金森病的重要性和难度,测量样本的声音被认为是寻找真实患者的最佳非侵入性方法之一。支持向量机是机器学习中最有效的分类工具之一,在许多领域得到了成功的应用。在本文中,我们实现了以前没有使用过的svm递归特征消除,从原始特征中选择包含最重要特征的子集进行分类。我们还将支持向量机与主成分分析相结合,用于选择22个特征的诊断PD集的主成分,以便进行比较。最后,在实验中重点讨论了SVM- rfe和SVM与PCA之间的关系。实验结果表明,SVM-RFE算法总体上具有较好的性能。
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引用次数: 9
High accuracy method of positioning based on multi-star-sensor 基于多星敏感器的高精度定位方法
Jian Han, C. Wang, B. Li
Star-sensor has an excellent capability of providing high accurate attitude, which depends on the accuracy of location to a large extent. At present, star-sensor is restricted by the accuracy of its location information which is normally given by Initial Navigation System, but this location information involves non-ignorable inaccuracy due to the accumulated error. In prior research, star-sensor needs to sense horizon level to do positioning, but this needs cooperation of other equipment or specific maneuvering which diminishes the nature of autonomy and concealment, at the same time, lowers dynamic performances and introduces more integration error. In this paper, a novel method has been proposed to solve the problems above, which needs no auxiliary information from outside. Location gained by this method is an absolute information which will not divergent over time. Above all, Celestial Navigation System can achieve better autonomous navigation capability and higher navigation accuracy by utilizing this method.
星敏感器具有提供高精度姿态的优良能力,而高精度姿态在很大程度上取决于定位精度。目前,星敏感器的定位信息通常由初始导航系统给出,其精度受到限制,但由于累积误差的影响,星敏感器的定位信息存在不可忽视的误差。在以往的研究中,星敏感器需要感知地平线进行定位,但这需要其他设备的配合或特定的机动,降低了星敏感器的自主性和隐蔽性,同时降低了星敏感器的动态性能,并引入了更多的积分误差。本文提出了一种不需要外界辅助信息的新方法来解决上述问题。通过这种方法获得的位置是一个绝对的信息,不会随着时间的推移而发散。综上所述,利用该方法可以使天体导航系统获得更好的自主导航能力和更高的导航精度。
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引用次数: 6
A using of just-in-time learning based data driven method in continuous stirred tank heater 基于实时学习的数据驱动方法在连续搅拌罐式加热器中的应用
J. Zheng, Hongfang Wang, Hongpeng Zhou, Tianyi Gao
As model-based methods have difficulty to solve more and more complex processes fault detection problems today, data-driven based techniques have been wildly used in industrial systems monitoring because of its ability to process unknown physical model. However, conventional static data-driven fault detection method have problems in processing nonlinear systems fault detection with deterministic disturbances in nonlinear system. In order to deal with this, a method called just-in-time learning based data-driven (JITL-DD) was invented. In this method, JITL is used for learning the nonlinear model and the disturbances to predict the output. The residuals of the predict and real one will be processed by static data-driven method to decide wether it has fault. In this article, A numerical example will be used to test the algorithm and a case study of CSTH are proposed to show the performance of JITL-DD method. As comparisons, JITL-PCA method is also employed to solve the same problem.
在基于模型的方法难以解决越来越复杂的过程故障检测问题的今天,基于数据驱动的技术由于其处理未知物理模型的能力而在工业系统监测中得到了广泛应用。然而,传统的静态数据驱动故障检测方法在处理非线性系统中具有确定性扰动的故障检测时存在问题。为了解决这个问题,发明了一种称为基于数据驱动的实时学习(jit - dd)的方法。在该方法中,使用JITL学习非线性模型和干扰来预测输出。通过静态数据驱动的方法对预测值和真实值的残差进行处理,判断是否存在故障。本文将用一个数值例子来验证该算法,并以CSTH为例来说明JITL-DD方法的性能。作为对比,我们也采用了JITL-PCA方法来解决同样的问题。
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引用次数: 1
Global asymptotic stability of anti-periodic solution for impulsive Cohen-Grossberg neural networks with multiple delays 多时滞脉冲Cohen-Grossberg神经网络反周期解的全局渐近稳定性
Q. Ma, Xinyu Pan, Sitian Qin
The global asymptotic stability of anti-periodic solution for Cohen-Grossberg neural networks (CGNNs) is investigated. The CGNNs we consider have impulsive effects and multiple delays. By constructing a suitable Lyapunov function, we prove the existence of the globally asymptotically stable anti-periodic solution for impulsive CGNNs. Several numerical examples are presented to illustrate the validity and improvement of our results.
研究了Cohen-Grossberg神经网络反周期解的全局渐近稳定性。我们考虑的cgnn具有脉冲效应和多重延迟。通过构造一个合适的Lyapunov函数,证明了脉冲型cgnn全局渐近稳定反周期解的存在性。最后给出了几个数值算例,说明了所得结果的有效性和改进。
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引用次数: 2
A KPI prediction approach with JITL for vehicular Cyber Physical System 基于JITL的车辆网络物理系统KPI预测方法
Hongpeng Zhou, Hao Ju, Tianyu Tan, Tianyi Gao
Intelligent transportation is a hot research field in Cyber-Physical System (CPS). In order to improve the driving safety, many studies have been conducted to predict collision probability and send out warning signal timely. However, most of these studies are model based with limited prediction accuracy. Moreover, the abundant historical data is leave-off. In this paper, a data-driven method is proposed to achieve the same objective, which could acquire a more satisfactory result and provide an accurate prediction for two key performance indicator(i.e. throttle and brake). A vehicle cyber-physical system (VCPS) benchmark is built on the professional software CarSim. The algorithm just-in time learning (JITL) would process motivation data produced by the benchmark and compute out the prediction result. For testifying the advantages of the proposed method, the other two fitting algorithms (i.e. PLS and KPLS) are compared with it. The simulation results prove that JITL could consume much lesser time and receive a more precise prediction.
智能交通是信息物理系统(CPS)中的一个研究热点。为了提高行车安全性,人们进行了大量的碰撞概率预测和及时发出预警信号的研究。然而,这些研究大多是基于模型的,预测精度有限。此外,丰富的历史资料是留下的。本文提出了一种数据驱动的方法来实现同样的目标,该方法可以获得更令人满意的结果,并对两个关键绩效指标(即:油门和刹车)。在专业软件CarSim上建立了车辆网络物理系统(VCPS)基准。jit (just-in - time learning)算法对基准测试产生的动机数据进行处理并计算预测结果。为了验证所提方法的优越性,将另外两种拟合算法(PLS和KPLS)与所提方法进行了比较。仿真结果表明,JITL可以节省大量的时间,获得更精确的预测结果。
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引用次数: 0
A picture is worth a thousand words: Introducing visual similarity into recommendation 一张图片胜过千言万语:在推荐中引入视觉相似性
Cheng Guo, M. Zhang, Yiqun Liu, Shaoping Ma
Recent recommender systems work well in terms of prediction accuracy, making use of a variety of features, such as users' personal information, purchasing history, browsing history and comments. However, traditional recommendation models have not made full use of item information and met difficulties with cold-start problems. On the other hands, visual information on item images is one of the most basic and informative features of the item, which has not been well-studied and applied in recommendation yet. In this paper, we introduce “visual similarity” between different items into recommendation, which measures the probability between items that are similar in terms of visual effect or “styles”. Observations on real e-commercial site data show that users tend to buy similar items, or items with similar “style”, indicating that visual information can be considered as a reliable feature in recommending process. Furthermore, a new matrix supplement approach is proposed to integrate item-item similarity matrix and traditional user-item matrix for collaborative filtering. Finally, a novel recommendation model is proposed which leverages visual similarity to collaborative filtering. Experiments on e-commercial website data shows that the proposed approaches result in superior performance compared with traditional recommendation algorithms, including Baseline Predictor, KNN (k-nearest-neighbors) and SVD (Singular Value Decomposition). Results also verifies that visual information does help relieve the “cold-start” problem in recommendation.
最近的推荐系统在预测准确性方面表现良好,利用了各种功能,如用户的个人信息、购买历史、浏览历史和评论。然而,传统的推荐模型没有充分利用项目信息,存在冷启动问题。另一方面,物品图像上的视觉信息是物品最基本的信息特征之一,在推荐中还没有得到很好的研究和应用。在本文中,我们将不同项目之间的“视觉相似性”引入到推荐中,它衡量的是在视觉效果或“风格”方面相似的项目之间的概率。对真实电子商务网站数据的观察表明,用户倾向于购买相似的商品,或者具有相似“风格”的商品,这表明视觉信息可以被认为是推荐过程中可靠的特征。在此基础上,提出了一种新的矩阵补充方法,将物品-物品相似度矩阵与传统的用户-物品矩阵相结合进行协同过滤。最后,提出了一种利用视觉相似性进行协同过滤的推荐模型。在电子商务网站数据上的实验表明,与Baseline Predictor、KNN (k-nearest-neighbors)和SVD (Singular Value Decomposition)等传统推荐算法相比,本文提出的推荐方法具有更好的性能。结果还验证了视觉信息确实有助于缓解推荐中的“冷启动”问题。
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引用次数: 4
Spherical image based visual servoing via nonlinear model predictive control 基于球面图像的非线性模型预测视觉伺服控制
Geng Wang, Guoqiang Ye
For cameras obeying the unified projection model, a set of independent visual features are designed with a virtual unitary spherical projection process. Then, image based visual servoing is formulated as a nonlinear constrained optimization problem by nonlinear model predictive control in the feature space. Feature jacobian is calculated to define the local model, which is used to predict the evolution of the visual features with respect to the camera velocity over a finite-prediction horizon. Iterative equations for constrained variables about visibility, camera velocity and task space limitation, are designed to meet both 2D and 3D constraints. Finally, simulation results with a classical perspective camera are presented to verify the effectiveness and improved behaviors of proposed method.
对于服从统一投影模型的摄像机,采用虚拟统一球面投影过程设计了一组独立的视觉特征。然后,将基于图像的视觉伺服转化为特征空间中的非线性模型预测控制的非线性约束优化问题。计算特征雅可比矩阵来定义局部模型,该模型用于在有限预测范围内预测视觉特征相对于相机速度的演变。设计了能见度、相机速度和任务空间限制等约束变量的迭代方程,以满足二维和三维约束。最后,给出了经典视角相机的仿真结果,验证了所提方法的有效性和改进行为。
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引用次数: 0
A trail detection method using statistical analysis of trail features in dense forest 基于统计分析的茂密森林中步道特征检测方法
Jeonghyeok Kim, Sanggil Kang, Heezin Lee
Small-footprint airborne LiDAR scanning systems are effective in modelling forest structures and can also improve trail detection. We propose a trail detection method through a statistical analysis from the LiDAR points. To do that, we statistically analyze features of trails for detecting a trail and digitized each feature and combine the results to distinguish between trail and non-trail areas. Our proposed method shows the feasibility of trail detection by using airborne LiDAR points gathered in dense mixed forest.
小足迹机载激光雷达扫描系统是有效的模拟森林结构,也可以提高跟踪检测。我们提出了一种基于激光雷达点的尾迹检测方法。为了做到这一点,我们统计分析痕迹的特征来检测痕迹,并将每个特征数字化,并结合结果来区分痕迹和非痕迹区域。本文提出的方法证明了利用机载激光雷达在茂密混交林中采集的点进行航迹检测的可行性。
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引用次数: 0
Event-based control for first-order unstable processes 一阶不稳定过程的事件控制
Qiancheng Xu, Hao Xia
This paper proposed an event-triggered mechanism for first-order unstable processes. A control system based on a new event-triggered mechanism and a PI controller is designed for set-point tracking and the load disturbance rejection. A stability analysis and a tuning method are provided. The effectiveness and feasibility of the proposed method is demonstrated by a simulation example.
提出了一种一阶不稳定过程的事件触发机制。设计了一种基于新的事件触发机制和PI控制器的控制系统,用于设定值跟踪和负载干扰抑制。给出了稳定性分析和调谐方法。通过仿真算例验证了该方法的有效性和可行性。
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引用次数: 0
期刊
2016 Seventh International Conference on Intelligent Control and Information Processing (ICICIP)
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