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UKACC International Conference on Control (CONTROL)

作者： Jingjing Liu Hongbo Wang Hongnian Yu Lili Zhang Luige Vladareanu Adrian Bruja Gal I. Alexandru Parallel Robot and Mechatronic System Laboratory of Hebei Province Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao China College of Electrical Engineering Yanshan University Qinhuangdao China School of Design Engineering and Computing Bournemouth University Poole UK Robotics and Mechatronic Department Institute of Solid Mechanics Bucharest Romania

In recent years many researchers are trying to combine wheeled movement with legged movement or hopping movement to strengthen the robots adaptability to environment. Hybrid robots are playing a more and more important role in our modern life. However, their controls are mostly complicated. So in this paper we present a new solution for the wheeled hopping robot. Based on the mechanical design, this robot has two movement modes: wheeled and hopping movement mode. While the center of gravity of the mechanism is under the wheels center, the wheeled hopping robot which is like a tumbler can keep its stability even when the wheels' velocity is zero. In this paper, we firstly introduce the description and design of the wheeled hopping robot. Then we explain how to choose the robot parameters and lastly we describe, how the robot through hopping, successfully traverses obstacles and ditches.

关键词： Mobile robots Shafts Wheels Springs Robot kinematics Force

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An evaluation approach based on word-of-mouth for trust models in recommendation systems

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Computer Modelling and New Technologies 2014年第11期18卷 605-609页

作者： Jiang, Feng Gao, Min Xia, Hui Xiong, Qingyu Wen, Junhao College of Civil Engineering Chongqing University Chongqing China College of Construction Engineering Chongqing Technology and Business Institute Chongqing China School of Software Engineering Chongqing University Chongqing China Key Laboratory of Dependable Service Computing in Cyber Physical Society Ministry of Education Chongqing China

Recommendation systems have been recognized as an effective approach to heavy information load. In recommendation systems, trust/reputation has attracted increasing attention because it helps to improve the precision of recommendation and the robustness of systems to shilling attacks. Recommendation system oriented trust models, mostly rating-based, used to build the reputation and trustiness among users. They are often evaluated in terms of how accurately they help to predict user ratings and how robustly they resist shilling attacks. However, those evaluation techniques disregard the trust values themselves: how accurately they calculate the trust values themselves is not measured. To solve the problem, in this work, we propose an approach to measure the trust values based on electronic word-of-mouth (eWoM) theory. The eWoM believes a user is reliability if he is of good public praise. In our approach, firstly, according to eWoM, the reliability value of a user can be judged by other users' votes - whether the user's ratings or feedbacks are positive or negative. Secondly, the trust values of users can be calculated by a trust model. Finally, we compare trust values and reliability values. As a case study, we propose a simple rating-based trust model and then evaluate the trust model based on the proposed evaluation approach and Amazon dataset.

关键词： Recommender systems

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Research on domain ontology-based concept similarity calculation

Research on domain ontology-based concept similarity calcula...

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2nd International Conference on Engineering and technology Innovation 2012, ICETI 2012

作者： Li, Wenjie Shi, Shasha Liu, Si Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology 300384 Tianjin China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology 300384 Tianjin China

ISBN: (纸本)9783037856123

Similarity computing of ontological concept has made rapid progress in the field of data mining, information processing and artificial intelligence and becoming one of the hot research field of information technology, particularly the idea of the semantic Web was proposed in 2000, the concept of semantic similarity has gotten more attention, while also facilitating its further development and application in information retrieval. Considering the deficiencies of existing concept similarity algorithm, this paper design the method to reduce the candidate set of domain concept, and put forward a similarity calculation model based on the concept name, instances, properties, and semantic structure of domain ontology. Integrated several main influencing factors, the experiments show the proposed algorithm can express the impact of various factors on the similarity in the calculation concept similarity of domain ontology. By comparing with the traditional similarity method and expertise experience value, the experiment result shows that the effectiveness and correctness of the concept similarity calculation model. © (2013) Trans Tech Publications, Switzerland.

关键词： Data mining

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Predictive Control for Visual Servo Stabilization of Nonholonomic Mobile Robots

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自动化学报 2013年第8期39卷 1238-1245页

作者： CAO Zheng-Cai YIN Long-Jie FU Yi-Li LIU Tian-Long College of Information Science and Technology Beijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Embedded System and Service Computing Ministry of EducationTongji UniversityShanghai 201804China State Key Laboratory of Robotics and Systems Harbin Institute of TechnologyHarbin 150080China

活动机器人获得了的 nonholonomic 的视觉伺服稳定广泛的注意。当前，这个问题的解决方案不管多么不认为可见性限制和致动器是限制，因此设计控制器是困难的在实际申请认识到令人满意的性能。在这份报纸，为一个活动机器人的视觉伺服稳... 详细信息

活动机器人获得了的 nonholonomic 的视觉伺服稳定广泛的注意。当前，这个问题的解决方案不管多么不认为可见性限制和致动器是限制，因此设计控制器是困难的在实际申请认识到令人满意的性能。在这份报纸，为一个活动机器人的视觉伺服稳定的一个预兆的控制器被介绍。第一，利用产生速度的命令的一个运动学的预兆的稳定控制器被介绍。然后，来临以便 asymptotically 做活动机器人的实际速度到需要的，一个动态预兆的控制器被设计。建议预兆的控制器能容易处理限制。最后，几模拟被执行，并且结果说明建议控制计划是有效的解决视觉伺服稳定问题。

关键词：非完整移动机器人稳定化控制器预测控制器视觉伺服生成速度运动预测稳定问题控制方案

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A universally stable and energy-efficient scheduling protocol for packet switching network

A universally stable and energy-efficient scheduling protoco...

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12th Annual IEEE International Symposium on Network computing and Applications, NCA 2013

作者： Shi, Yangguang Zhang, Fa Liu, Zhiyong Institute of Computing Technology Chinese Academy of Sciences China University of Chinese Academy of Sciences China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences China

ISBN: (纸本)9780768550436

Energy efficiency is becoming an important issue in networks. Although some research works have been devoted to this topic, only a little attention has been paid to the stability of the network equipped with the energy conservation mechanisms. In fact, we find that the stability of networks can be undermined in the worst case if it isn't considered with care by the energy conservation *** this paper, we propose an energy-efficient scheduling protocol which can guarantee the stability of the network in all cases. We start by building a new model which can be used to verify the stability of the network equipped with the energy conservation mechanisms. With this model, we transform the packet scheduling problem to a Job Shop Scheduling problem. For this problem, we propose a time-stamp based work-conserving scheduling algorithm - G-FSA. Compared with existing methods, this scheduling algorithm guarantees a tighter bound on the make span of the jobs. Then, we integrate G-FSA with a time partition approach to generate our energy-efficient packet scheduling protocol. It is proved that the obtained protocol can guarantee the stability of network in all cases. And its approximation ratio in terms of energy efficiency can be bounded by O((1+ )) for any > 0, where is an input parameter depending on the hardware infrastructure. Typically, 1

关键词： Scheduling algorithms

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Two-dimensional color uncorrelated principal component analysis for feature extraction with application to face recognition

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2012 International Conference on service-Oriented computing, ICSOC 2012

作者： Zhao, Cairong Miao, Duoqian Department of Computer Science and Technology Tongji University Shanghai 201804 China Key Laboratory of Embedded System and Service Computing Ministry of Education Shanghai 7201804 China Ministry of Education Nanjing 210094 China

ISBN: (纸本)9783319029603

This paper proposes a two-dimensional color uncorrelated principal component analysis algorithm(2DCUPCA) for unsupervised subspace learning directly from color face images. The 2DCUPCA can be used to explore uncorrelated properties among color-based features, which contain minimum redundancy and ensure linear independence among features. Furthermore, the proposed 2DCUPCA provided the theoretical foundations analysis and proved the uncorrelated property between color-based features in theory. This makes it sure that the extracted features directly from three color image matrices will be uncorrelated. Finally, experimental results on the AR and FRGC-2 color face databases show that 2DCUPCA achieves better recognition performance than other color face recognition methods. © Springer International Publishing 2013.

关键词： Principal component analysis

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Research on real solutions number of the SHEPWM equations based on the mechanical proving and groebner bases theory

Research on real solutions number of the SHEPWM equations ba...

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Chinese Control Conference (CCC)

作者： Ke-hu Yang Ru-yi Yuan Wen-sheng Yu School of Mechanical Electronic & Information Engineering China University of Mining and Technology Xuzhou Jiangsu CN Integrated Information System Research Center Institute of Automation Institute of Automation Chinese Academy of Sciences Beijing Beijing CN Shanghai Key Laboratory of Trustworthy Computing East China Normal University Shanghai CN

The real solutions number of the switching angles for the SHEPWM inverter has been discussed in this paper. Firstly, the SHEPWM equations were transformed to polynomial equations with inequality constrains by using the multiple-angle formulas and variables substitution, then, the equivalent groebner bases of the polynomial equations were computed, finally, the real solutions number of the SHEPWM equations were discussed with the mechanical proving theory and algorithm of the semi-algebraic systems. The conclusion of there is only one solutions for the single phase SHEPWM inverter with less than 7 switching points in a quarter period and the theoretical maximum modulation ratio were derived for the first time. The experiments and simulations verify the correctness of these conclusions.

关键词： Inverters Switches Harmonic analysis Polynomials Mathematical model Modulation

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Model predictive control for HVAC systems - A review

Model predictive control for HVAC systems - A review

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2013 IEEE International Conference on Automation Science and Engineering, CASE 2013

作者： Kwadzogah, Roger Zhou, Mengchu Li, Sisi Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07013 United States Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 201804 China

ISBN: (纸本)9781479915156

The world faces an energy problem. Oil supply is gradually running out. Its use is polluting the planet with greenhouse gas. Most alternative energy sources also pose some environmental problems. Hence the efficient use of energy must be an integral part of any solution to them. Whenever possible, one must use advanced control engines and technologies to achieve the highest energy efficiency. In Heating Ventilation and Air Conditioning (HVAC) industry, much research has identified a number of energy-saving control methods. Derived from optimal control theory, Model Predictive Control (MPC) is one of them. This paper presents a comprehensive review of its applications to HVAC systems. © 2013 IEEE.

关键词： Model predictive control

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Cough signal recognition with gammatone cepstral coefficients

Cough signal recognition with gammatone cepstral coefficient...

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2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013

作者： Liu, Jia-Ming You, Mingyu Li, Guo-Zheng Wang, Zheng Xu, Xianghuai Qiu, Zhongmin Xie, Wenjia An, Chao Chen, Sili Key Laboratory of Embedded System and Service Computing Department of Control Science and Engineering Tongji University Shanghai 201804 China Department of Respiratory Medicine Shanghai 200065 China

ISBN: (纸本)9781479910434

Cough Recognition is a valuable classification problem in healthcare. Generally, feature representation contributes a lot to the overall classifying performance. In this paper, a novel feature extraction method, Gammatone Cepstral Coefficients (GTCC), is investigated for cough recognition. The accuracy of GTCC comparing with MFCC is evaluated on a designed cough dataset following a 10 fold cross-validation schemes. Considering the imbalance of that dataset, weighted SVM is applied as the base classifier. The results indicate that GTCC surpass MFCC in modeling cough signals. With combination of GTCC and MFCC, a better performance is achieved. This paper provides a better feature representation prototype in cough recognition. © 2013 IEEE.

关键词： Feature extraction

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Real-Time Communication Method for mHealth Base on Extended XMPP Protocol

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Communications and Network 2013年第3期5卷 590-595页

作者： Chenjie Shi Yu Fang The Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China

Considering characteristic of mHealth communication and problems of existing methods, this paper presents a real-time communication method for mHealth based on extended XMPP protocol. The method can maintain the role status efficiently and reduce data latency during the communication process. Meanwhile, it can be extended flexibly to meet increasing communication demands of mHealth services. Furthermore, a system framework is presented to support telemonitoring scene. Finally, system implementation and feasibility tests verify the effectiveness of the method and framework.

关键词： mHealth XMPP Protocol Real-Time Communication

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