检索结果-内蒙古大学图书馆

A reinforcement learning based tag recommendation

作者： Ge, Feng He, Yi Liu, Jin Lv, Xiaoming Zhang, Wensheng Li, Yiqun State Key Laboratory of Software Engineering Computer School Wuhan University 430072 China Logistics Group Wuhan University 430072 China State Key Laboratory of Intelligent Control and Management of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China Baidu Inc. 100085 China

ISBN: (纸本)9783642256578

This paper proposes a reinforcement learning based tag recommendation algorithm to deal with the data sparseness that affects the performance stability of collaborative filtering algorithms. Our algorithm integrates user tags into traditional collaborative filtering algorithms and attaching importance to user interest shift in the process of user interest learning process. Empirical Cases of comparing with traditional collaborative filtering algorithms indicate that our recommend algorithm exhibits better performance competition. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Reinforcement learning

来源：评论

学校读者我要写书评

暂无评论

Investment decision model of crime prevention system based on expected monetary values of the economic loss caused by risks

Investment decision model of crime prevention system based o...

引用

International Conference on Computer Research and Development

作者： Lv, Haitao Hu, Ruimin Huang, Bin Lu, Tao Dai, Jingjing National Engineering Research Center for Multimedia Software Wuhan University Wuhan 430072 China Center for Information Technology Jiujiang University. Jiujiang Jiangxi 332000 China Hubei Province Key Laboratory of Intelligent Robot Wuhan Institute of Technology Wuhan 430070 China

ISBN: (纸本)9781612848372

In recent years more and more cities are planning to construct crime preventing systems in order to reduce the loss caused by risks. There are many kinds of crime preventing systems with different variety and price in the market so far. It is the problem that each decision-maker faces jointly that how to select a crime preventing system for a city which would be a perfect fit. From the stand point of decision-makers, this paper proposed an investment decision-making model for the construction of crime preventing systems. This model measures the quality of a crime prevention system through expected monetary values of the economic loss caused by risks. This article also introduced two decision-making methods, which were optimistic rule and pessimistic rule. Finally this paper proved the model reasonable through an actual application. © 2011 IEEE.

关键词： Crime

来源：评论

学校读者我要写书评

暂无评论

Active collision avoidance maneuver design under constant thrust

Active collision avoidance maneuver design under constant th...

引用

作者： Qi, Yongqiang Jia, Yingmin Du, Junping Yu, Fashan Beijing 100191 China Beijing 100191 China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan China

ISBN: (纸本)9783902661937

In this paper, the relative position parameters of the target spacecraft are obtained by using the vision measurement and the target maneuver positions are calculated through the isochronous interpolation method. Furthermore, new switch control laws under constant thrust are designed for active collision avoidance maneuver of the chaser along a specified trajectory. The switch control laws are obtained based on the acceleration sequences and the working times of thrusters in three axes which can be respectively computed by the time series analysis method. The perturbations and fuel consumptions are addressed during the computation of the working times. The simulation results show that the constant thrust maneuver can effectively guarantee the chaser maneuvering along the specified trajectory. © 2011 IFAC.

关键词： Time series analysis

来源：评论

学校读者我要写书评

暂无评论

Risk-sensitive cubature filtering for jump Markov nonlinear systems and its application to land vehicle positioning

Risk-sensitive cubature filtering for jump Markov nonlinear ...

引用

作者： Li, Wenling Jia, Yingmin Du, Junping Yu, Fashan Beijing 100191 China Ministry of Education Beijing 100191 China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan China

ISBN: (纸本)9783902661937

In this paper, a risk-sensitive filter for a class of jump Markov nonlinear systems is proposed. By using a set of weighted cubature points to approximate the intractable risk-sensitive recursions, the proposed filter could exhibit improved numerical stability with respect to the derivation of the square-root covariance, for which the unscented transform technique might halt the operations due to the presence of non-positive definite covariance. The performance of the proposed filter is illustrated through a simulation study of tracking a land vehicle with maneuvers. © 2011 IFAC.

关键词： Kalman filters

来源：评论

学校读者我要写书评

暂无评论

High-order MRF prior based bayesian deblurring

International Journal of Digital Content Technology and its ...

引用

International Journal of Digital Content Technology and its Applications 2011年第12期5卷 383-392页

作者： Zhao, Bo Zhang, Wensheng Liu, Jin Ding, Huan State Key Laboratory of Intelligent Control and Management of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China State Key Laboratory of Software Engineering Computer School Wuhan University China

A novel image deblurring method based on high-order non-local range Markov Random Field (NLR-MRF) prior is proposed in the paper. NLR-MRF provides an effective framework to model the statistical prior of natural images and leads to excellent performance in the application of image denoising and inpainting. Moreover, the framework will be extended to image deblurring in our work. Instead of commonly used maximum a-posteriori (MAP) estimation, which has several shortcomings, the high-order NLR-MRF prior is integrated into Bayesian minimum mean squared error (MMSE) estimation framework. Then, an efficient Gibbs sampling algorithm is adopted to compute MMSE estimation. The proposed method frees the user from determining regularization parameter beforehand, which relies on unknown noise level. We perform experiments on synthetic and real-world data to demonstrate the effectiveness of our method. Both quantitatively and qualitatively evaluations show superior or comparable results to the state-of-art deblurring methods.

关键词： Image denoising

来源：评论

学校读者我要写书评

暂无评论

Implementation of behavioral subtyping in aspect-oriented program

International Journal of Digital Content Technology and its ...

引用

International Journal of Digital Content Technology and its Applications 2011年第2期5卷 206-215页

作者： He, Chengwan Li, Zheng Computer School of Science and Engineering Wuhan Institute of Technology Wuhan 430073 China Hubei Province Key Laboratory of Intelligent Robot Wuhan 430073 China State key laboratory of Software Engineering School of Computer Wuhan University China

Semantic conflicts may appear in the process of weaving aspects in the aspect-oriented program. This paper proposes an approach to check such semantic conflicts based on the concept of behavioral subtyping, and presents the conditions of behavioral subtyping. Through extracting the preconditions and postconditions defined in the base program and aspects, then automatically transforming them into the code to check conditions of behavioral subtyping, consequently it achieves checking of semantic conflicts, and guarantees correctness of the program's behavior after weaving aspects. These codes for checking semantic conflicts are implemented by using aspects, and the implementation method is explained through an example.

关键词： Aspect oriented programming

来源：评论

学校读者我要写书评

暂无评论

Study of hybrid strategy for ambulatory ECG waveform clustering

Journal of Software

引用

Journal of software 2011年第7期6卷 1257-1264页

作者： Zheng, Gang Yu, Tian Laboratory of Biological signal and Intelligent Processing Tianjin University of Technology Tianjin China Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology Tianjin China School of Computer and Communication Engineering Tianjin University of Technology Tianjin China Laboratory of Biological signal and Intelligent Processing Tianjin University of Technology Tianjin China Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology Tianjin China

A hybrid strategy has been proposed to reduce the wrong clustering on Ambulatory ECG (electrocardiogram). Since Ambulatory ECG is usually composed by 24 hours data, the number of individual ECG waveform can reach to 100,000, the request for accurate clustering result is highly required. The proposed strategy adopted some intelligent algorithms to solve the above problem. It clusters ECG waveform sample (selected from Ambulatory ECG) synchronously by Max-Min distance clustering algorithm, K-means algorithm and Simulated annealing algorithm first. And then, it adopted all three outputs from the above three algorithms as input on Back Propagation Artificial Neural Network (BP ANN). In the end, we got more accurate clustering result from the output of ANN. For testing the results, data of MIT/BIH arrhythmia database were used for experiments. After the controlled trial on MIT/BIH data, it can be safely concluded that the clustering result achieved by improved strategy can got more accurate than that by the traditional clustering algorithm. An average accuracy ratio is about 94.6%, 1.6% higher than k-means algorithm averagely and 1.3% higher than Simulated Annealing algorithm averagely. © 2011 ACADEMY PUBLISHER.

关键词： Electrocardiograms

来源：评论

学校读者我要写书评

暂无评论

Integrating Multi-Criteria Collaborative Filtering and Trust filtering for personalized Recommender Systems

Integrating Multi-Criteria Collaborative Filtering and Trust...

引用

IEEE Symposium on Computational Intelligence in Multi-Criteria Decision-Making, MCDM

作者： Qusai Shambour Jie Lu Laboratory of Decision Systems and e-Service Intelligence School of Software Centre of Quantum Computation and Intelligent Systems Faculty of Engineering and Information Technology University of Technology-Sydney NSW Australia Laboratory of Decision Systems and e-Service Intelligence School of Software Centre of Quantum Computation and Intelligent Systems Faculty of Engineering and Information Technology Sydney University of Technology NSW Australia

Recommender Systems are information systems that attempt to recommend items of interest to particular users based on their explicit and implicit preferences. Multi-Criteria Decision Making (MCDM) aims at assisting the decision maker in the decision making process, or giving the decision maker a recommendation, concerning a set of actions, alternatives, items etc. Thus, despite their differences, Recommender Systems and Multi-Criteria Decision Making share the same objective which is supporting the decision making process and reducing information overload. In this paper we propose a novel hybrid Multi-Criteria Trust-enhanced CF (MC-TeCF) approach. The proposed MC-TeCF approach combines the MC user-based CF and the MC user-based Trust filtering approaches to alleviate the standard Single-Criteria user-based CF limitations. Empirical results demonstrate the significance and effectiveness of the proposed MC-TeCF approach in terms of improving accuracy, as well as in dealing with very sparse data sets or cold start users compared with the standard Single-Criteria user-based CF approach.

关键词： Recommender systems Motion pictures Measurement Decision making Decision support systems Social network services

来源：评论

学校读者我要写书评

暂无评论

Adaptive iterative learning control for uncertain delay systems based on model matching technique

Adaptive iterative learning control for uncertain delay syst...

引用

作者： Su, Haixia Jia, Yingmin Du, Junping Yu, Fashan Beijing 100191 China Beijing 100191 China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan China

ISBN: (纸本)9781457700804

In this paper, an adaptive iterative learning control (ILC) scheme is proposed for trajectory tracking of uncertain delay systems based on model matching technique. The reference model is a delay system operating over in a finite time interval. An iterative model matching controller is designed and an iteration domain adaptive law is chosen to estimate the unknown parameters. It shows that the model matching technique can be applied in a straightforward method to ILC problem. A simulation example is included to illustrate the designed scheme. © 2011 AACC American Automatic Control Council.

关键词： Iterative methods

来源：评论

学校读者我要写书评

暂无评论

Gaussian mixture PHD smoother for jump Markov models in multiple maneuvering targets tracking

Gaussian mixture PHD smoother for jump Markov models in mult...

引用

作者： Li, Wenling Jia, Yingmin Du, Junping Yu, Fashan Beijing 100191 China Beijing 100191 China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan China

ISBN: (纸本)9781457700804

This paper presents a Gaussian mixture probability hypothesis density (GM-PHD) smoother for tracking multiple maneuvering targets that follow jump Markov models. Unlike the generalization of the multiple model GM-PHD filters, our aim is to approximate the dynamics of the linear Gaussian jump Markov system (LGJMS) by a best-fitting Gaussian (BFG) distribution so that the GM-PHD smoother can be carried out with respect to an approximated linear Gaussian system. Our approach is inspired by the recognition that the BFG approximation provides an accurate performance measure for the LGJMS. Furthermore, the multiple model estimation is avoided and less computational cost is required. The effectiveness of the proposed smoother is verified with a numerical simulation. © 2011 AACC American Automatic Control Council.

关键词： Probability density function

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：