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Combining feature selection and resample to improve classification accuracy

Journal of Computational Information systems 2012年第22期8卷 9539-9544页

作者： Liu, Jiaming Wang, Xiao Zhao, Qingce You, Mingyu Li, Guozheng The Key Laboratory of Embedded System and Service Computing Department of Control Science and Engineering Tongji University Shanghai Shanghai 201804 China

The paper provides the solution of the campion for CDMC2011, a data mining contest. The task for the data mining contest organized in conjunction with the ICONIP20II conference was to learn three predictive models (i.e. a classifier) capable of distinguishing between different classes for three separate tasks. Different combinations of data preprocess, feature selection and classifier learning methods were tried to obtain the best results. The performance of classifiers are improved by ensemble learning method. The final accuracy on test dataset shows our methods outperformed others. Copyright © 2012 Binary Information Press.

关键词： Intrusion detection

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service on demand of transportation information grid system model and analysis based on TCPN

Service on demand of transportation information grid system ...

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2012 International Conference on Computer Science and Electronics Engineering, ICCSEE 2012

作者： Li, Jingxia Zhao, Huijuan Wu, Guodong School of Information and Computer Science Anhui Agricultural University Hefei Anhui Province China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China Information College Shanghai Ocean University Shanghai China

ISBN: (纸本)9780769546476

Along with the application and popularity of transportation information grid system, users become more and more, original configuration can't meet actual demand. In this paper we establish timed colored Petri net process model for service On Demand process, which is one of the main service provided by the system. Through simulating increasing users and the amount of processes waiting for service On Demand request, we analysis request response time change, and provide beneficial reference for extension of system configuration. © 2012 IEEE.

关键词： Petri nets

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Adaptive rate-distortion prediction for multiple reference selection and inter-mode decision

Adaptive rate-distortion prediction for multiple reference s...

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13th Pacific-Rim Conference on Multimedia, PCM 2012

作者： Zhao, Tiesong Zhang, Yun Kwong, Sam Wang, Hanli Chen, Qian Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen China Department of Computer Science City University of Hong Kong Hong Kong Hong Kong Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China

ISBN: (纸本)9783642347771

To minimize Rate-Distortion (RD) cost in video coding, RD Optimization (RDO) technique is adopted, which also brings increasingly computational complexity in Motion Estimation (ME), multiple reference selection and mode decision. In this paper, a Gaussian model based adaptive RD cost prediction method is developed to jointly speed up multiple reference selection and inter-mode decision. Besides the ability of achieving good coding efficiency with much reduced computational power, our method is also with two major advantages. First, it can achieve robust performance, including computational complexity reduction and almost intact video quality, with a wide range of video sequences resolutions and even for various scene changes;second, it could be either individually used or combined with the other efficient mode decision algorithms, and in both cases, our method could achieve remarkable performance, which is revealed by exhaustive experimental results. © 2012 Springer-Verlag.

关键词： Image coding

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Association analysis between symptoms (signs) and syndromes of chronic gastritis based on associated density

Association analysis between symptoms (signs) and syndromes ...

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2012 International Conference on system Simulation, ICUSS 2012

作者： Liu, G.P. Li, G.Z. Yan, S.X. Li, F.F. Fu, J.J. Zhen, R.W. Laboratory of Information Access and Synthesis of TCM Four Diagnosis Basic Medical College Shanghai University of Traditional Chinese Medicine Shanghai 201203 China Key Laboratory of Embedded System and Service Computing Department of Control Science and Engineering Tongji University Shanghai 201804 China

ISBN: (纸本)9781849195386

Purpose: The analysis of syndrome distribution and the association between symptom((signs))-syndrome in chronic gastritis (CG) patients can provide references for research about Traditional Chinese Medicine (TCM) diagnosis and treatment of CG. Method: This paper applies the investigation method of clinical epidemiology, adopts probability statistics method and comes up with the concept of associated density to conduct association analysis of symptom-syndrome. Result: In the distribution of syndromes patients who have a single syndrome occupy 64.7% of the whole sample;some symptoms have been selected out, of which the associated density is more than 0.6. Conclusion: Through this comparison of the values, we found the obvious one-way relationship of the symptoms (signs) and syndromes, and the results are in line with traditional Chinese medicine theory. This method effectively complements and supports traditional Chinese medicine point of view and hypothesis.

关键词： Diagnosis

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Logical difference analysis based on variable precision lower approximation operator and graded upper approximation operator

Logical difference analysis based on variable precision lowe...

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2012 International Conference on Computer Science and Information Processing, CSIP 2012

作者： Zhang, Xianyong Miao, Duoqian Department of Computer Science and Technology Tongji University Shanghai 201804 China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 201804 China College of Mathematics and Software Science Sichuan Normal University Chengdu Sichuan 610068 China

ISBN: (纸本)9781467314114

This paper aims to construct and analyze an original logical difference based on the quantitative approximation operators. According to the variable precision lower approximation operator and graded upper approximation operator, we first put forward the specific logical difference;the new concept makes the specific logical combination on precision and grade, and has the practical multiple quantitative meaning. Then, both the fundamental structure and properties are investigated and obtained for the logical difference. Furthermore, two algorithms, the regular and structural algorithms, are proposed and analyzed, and the structural algorithm has more advantages. Finally, an example is provided. The proposed concept partially extends the graded and classical approximation operators;thus, some properties are achieved correspondingly for these previous approximation operators. © 2012 IEEE.

关键词： Rough set theory

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A relational taxonomy of services for large scale service repositories

A relational taxonomy of services for large scale service re...

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2012 IEEE 19th International Conference on Web services, ICWS 2012

作者： Wu, Yan Yan, Chungang Ding, Zhijun Wang, Pengwei Jiang, Changjun Zhou, Mengchu Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07102 United States School of Electronics and Information Engineering Tongji University Shanghai China

ISBN: (纸本)9780769547527

With the rapid development of service-oriented computing (SOC) and service-oriented architecture (SOA), the number of services is rapidly increasing. How to organize and manage services effectively in repositories to improve the efficiency of service discovery and composition is important. This paper proposes three categorization rules to classify services for a large scale repository to form a relational taxonomy. The service retrieve scope can be drastically narrowed by this taxonomy. Therefore, the efficiency of service discovery and service composition can be greatly improved. We evaluate and compare the performance of the proposed method and other related ones via a publicly available test set, ICEBE05. The experimental results validate the effectiveness and high efficiency of the proposed one. © 2012 IEEE.

关键词： Web services

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Algorithms and analyses of logical difference of graded lower and upper approximation operators

Algorithms and analyses of logical difference of graded lowe...

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2012 International Conference on Computer Science and Information Processing, CSIP 2012

ISBN: (纸本)9781467314114

Grade serves as a fundamental quantitative index, and the graded rough set model is a basic model. Thus, this paper aims to investigate an original logical difference in the graded rough set model. According to the specific logical requirement on the grade index, the logical difference is put forward based on the graded lower and upper approximation operators;the new concept has the practical logical quantitative meaning. Then, both the macroscopic essence and microscopic fundamental structure are obtained for the new concept. For calculation, two algorithms, the conventional and microscopic algorithms are proposed and analyzed emphatically, and we conclude that the microscopic algorithm has more advantages in time and space complexity. Finally, the logical difference and its algorithms are both illustrated by an example. © 2012 IEEE.

关键词： Rough set theory

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A study on the optimum state for classroom learning from brain cognition perspective-research on relaxed alertness

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Journal of Convergence Information Technology 2012年第23期7卷 564-571页

作者： Gu, Rong Li, Jie Department of Electronic Science and Technology Tongji University Shanghai China The Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China

Booming development in brain science injects new vitality into the reform of teaching methods. Based on the perspective of brain cognition, this article addresses the optimum state for classroom learning- the relaxed alertness. This is a good state of mind combined low threats with high challenges. Specially, the vigilance is estimated by extracting useful electroencephalogram (EEG) information in time-domain, frequency-domain and spatial distribution. It is used as an indicator to judge whether a student is in the optimum state. Focusing on how to achieve that ideal state, this article discusses some new teaching methods, including the use of Baroque music to stimulate alpha brainwave, the design of effective pattern of guiding class to arouse positive emotions of students and the conversion of teaching forms as novel stimuli to heip them improve vigilance and tide over thinking trough. The effectiveness of these methods is verified by the relevant experimental results.

关键词： Electroencephalography

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Transactional and QoS-aware selection algorithm for reliable Web service composition

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Journal of Computational Information systems 2012年第11期8卷 4633-4640页

作者： Shen, Hongjie Ding, Zhijun Wang, Pengwei Chen, Hongzhong Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China State Key Laboratory of Software Engineering Wuhan University Wuhan 430072 China

At present, most of the work has focused on Web services composition from the QoS side, little work being done on investigating how to implement service selection based on transactional and QoS requirements. In complicated network environment, composite services need transactional support for correct and reliable execution. Therefore, How to design a composite service to ensure not only correct and reliable execution but also optimal QoS is a challenging issue. This paper addresses the problem of selecting services by aggregating the transactional and QoS requirements. First, we presented global optimization selection algorithms based on two selection models of composite service with transactional requirements. Then, a heuristic selection algorithm is presented to select an approximately optimal transactional composite service within a reasonable time. Lastly, experiments are conducted to analyze the performance of our proposed algorithms. © 2012 Binary Information Press.

关键词： Quality of service

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Battery discharge characteristics of wireless sensors in building applications

Battery discharge characteristics of wireless sensors in bui...

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2012 9th IEEE International Conference on Networking, Sensing and Control, ICNSC 2012

作者： Guo, Wenqi Healy, William M. Zhou, MengChu Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07102 United States National Institute of Standards and Technology Gaithersburg MD 20899 United States Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China

ISBN: (纸本)9781467303880

Sensor nodes in wireless networks often use batteries as their source of energy, but replacing or recharging exhausted batteries in a deployed network can be difficult and costly. Therefore, prolonging battery life becomes a principal objective in the design of wireless sensor networks (WSNs). There is little published data that quantitatively analyze a sensor node's lifetime under different operating conditions. This paper presents several experiments to quantify the impact of key wireless sensor network design and environmental parameters on battery performance. Our testbed consists of MicaZ motes, commercial alkaline batteries, and a suite of techniques for measuring battery performance. We evaluate known parameters, such as communication distance, working channel and operating power that play key roles in battery performance. Through extensive real battery discharge measurements, we expect our results to serve as a quantitative basis for future research in designing and implementing battery-efficient sensing applications and protocols. © 2012 IEEE.

关键词： Zigbee

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