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检索条件"机构=Key Laboratory of Services Computing Technology and System"

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Super-resolution image reconstruction based on K-means-Markov network

Super-resolution image reconstruction based on K-means-Marko...

引用

5th International Conference on Natural Computation, ICNC 2009

作者： Ma, Yanjie Zhang, Hua Xue, Yanbing Zhang, Simiao Tianjin Key Laboratory of Intelligence Computing Novel Software Technology Tianjin University of Technology 300191 Tianjin China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin 300191 China

ISBN: (纸本)9780769537368

We address a learning-based method for super resolution. Training sample set provide a candidate highresolution interpretation for the low-resolution images. Modeling image patches as Markov network node, and we learn the parameters of the network from training set, compute probability distribution by K-means algorithm. Given a new low-resolution image to enhance, we select from the training data a set of 10 candidate high-resolution patches for each patch of low-resolution image. In Bayesian belief propagation, we use compatibility relationship between neighboring candidate patches to select the most probable high-resolution candidate. The experimental results show that this method can obtain better result. © 2009 IEEE.

关键词： Belief propagation

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An intelligent home middleware system based on context- Awareness

An intelligent home middleware system based on context- Awar...

引用

5th International Conference on Natural Computation, ICNC 2009

作者： Wang, Chun-Dong Mo, Xiu-Liang Wang, Huai-Bin Tianjin Key Laboratory of Intelligence Computing Novel Software Technology Tianjin University of Technology 300191 Tianjin China Key Laboratory of Computer Vision and System Tianjin University of Technology Ministry of Education 300191 Tianjin China

ISBN: (纸本)9780769537368

An intelligent home system is designed and implemented based on the context-awareness technology, which minimizes users' interventions and maximizes functional autonomy of systems. A multi-agent technology is proposed based and service oriented approach to build our middleware which supports tasks including acquiring, discovering, interpreting, reasoning, accessing various contexts and interoperability between different context-aware systems. In order to simplify the design of our middleware and make it convenient for users, a third-party, "Internet service providers", is proposed which is responsible for the service updating and service composition. © 2009 IEEE.

关键词： Middleware

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Using SMS and Web technology in mobile government information services platform

Using SMS and Web technology in mobile government informatio...

引用

2010 International Conference on Educational and Information technology, ICEIT 2010

作者： Wang, Fayu Zhang, Hua Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin 300191 China

ISBN: (纸本)9781424480340

With the fast development of communication technology based on Internet, the mobile phones become widely to be used in daily life. Short message plays the most important role in our daily life, mobile users can obtain information timely and conveniently via SMS. According to the characteristics and the practical needs of current government information services system, this paper first briefly introduced the SMS platform's research background and the research present situation, the system structure of the short message platform, the primary functions of the mobile government information services platform and the key technology of its design and realization, in detail described the SMS technology and Ajax web technology, etc. the system design technology has a certain referent value for the design of such kind of short message services platform. © 2010 IEEE.

关键词： Web services

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SAR image segmentation based on Markov random field model and multiscale technology

SAR image segmentation based on Markov random field model an...

引用

6th International Conference on Fuzzy systems and Knowledge Discovery, FSKD 2009

作者： Jiao, Xu Wen, Xian-Bin Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin 300191 China Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China

ISBN: (纸本)9780769537351

A valid multiscale classification method of synthetic aperture radar (SAR) imagery is proposed based on Multiscale technology and Markov Random Field (MRF) mode. Firstly, we employ multiscale autoregressive model for extracting the feature of SAR image. which is modeled by Markov Random Field (MRF) Model that relies on the Gaussian distribution. Secondly, using the joint probability distribution in terms of an energy function, estimation of parameters can be performed by the stochastic relaxation algorithm. Then the maximum posteriori (MAP) is designed as the optimal criterion and the final labels are obtained by the simulated annealing algorithm. Experimental results show that this method is accurate, efficient and robust. © 2009 IEEE.

关键词： Simulated annealing

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Design and realization of maintenance information services platform based on SMS and internet

Design and realization of maintenance information services p...

引用

2010 2nd International Conference on Communication systems, Networks and Applications, ICCSNA 2010

作者： Wang, Fayu Zhang, Hua Xu, Guangping Zhang, Lan Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin 300191 China

ISBN: (纸本)9781424474769

This paper introduces the design and realization of information service system based on the Internet and mobile communications. The system considers the short message processing as a Web Service located in a remote server. SMS Server as the client of this Web Service calls the services provided by the Web Service, special SMS Format is given, Ajax ,Asynchronous Web services and Multi-threading are used to develop the system. Based on user-role-right three-level model, the control of user rights is realized and the system security is ensured. This system provides referenced values for the designs of all kinds of short message service platforms. ©2010 IEEE.

关键词： Web services

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A new intrusion detection system based on protocol acknowledgement

A new intrusion detection system based on protocol acknowled...

引用

International Conference on Multimedia technology

作者： Wang, Chundong Deng, Quancai Chang, Qing Zhang, Hua Wang, Huaibin Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology 300191 Tianjin China Key Laboratory of Computer Vision and System Tianjin University of Technology Ministry of Education 300191 Tianjin China

ISBN: (纸本)9781424478743

Pattern matching method has been used in this paper, and intrusion detection method based on protocol acknowledgement is proposed. We analyze how to determine the time interval value of ΔT and the threshold value of N, and the existence of direct proportion relationship between ΔT and N is proved. The protocol acknowledgement module includes packet filtering and state protocol analysis techniques. Packet filtering technology can filter out the packet that the system does not care about to improve the efficiency of intrusion detection and security of the system itself;state protocol analysis technology that captures the data and maps for the state sequence accurately characterizes the process and attack steps of the protocol, which can effectively detect the invasion of multiple data packets collaboration. DDoS attack device is used to simulate the attack in the experiment. Experimental results show that the protocol acknowledgement method can effectively detect the attack that is similar to "TCP SYN FLOOD" and "Ping probe" attacks. ©2010 IEEE.

关键词： Pattern matching

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Otsu thresholding segmentation algorithm based on Markov Random Field

Otsu thresholding segmentation algorithm based on Markov Ran...

引用

2011 7th International Conference on Natural Computation, ICNC 2011

作者： Wang, Qian Zhang, Hua Qi Dong Niu, Qingxiao Xu, Guangping Xue, Yanbing Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology Tianjin 300384 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology 300384 Tianjin China

ISBN: (纸本)9781424499533

Since Otsu algorithm does not take the image spatial neighbor information into consideration, we combine the Markov random field with Otsu algorithm to integrate gray level information and spatial correlation information for the pixels. In this paper, Otsu thresholding algorithm based on Markov Random Field is proposed. In this algorithm, the neighborhood rejectability function is imported to Otsu algorithm and an threshold selection function is improved. The experiment results verify that applying our algorithm to road image segmentation can achieve good effects. © 2011 IEEE.

关键词： Image segmentation

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Neural network detection of shilling attack based on user rating history and latent features

Neural network detection of shilling attack based on user ra...

引用

2019 International Conference on Machine Learning, Big Data and Business Intelligence, MLBDBI 2019

作者： Yuan, Wanqiao Xiao, Yingyuan Jiao, Xu Ming, Yidong Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology Tianjin300384 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin300384 China

ISBN: (纸本)9781728150949

The recommendation system is a significant field to solve the problem of information overload today. However, the recommendation system relies heavily on the user's behavior information, which is easy to suffer attacks. Therefore, how to prevent the recommendation system from effecting by the attacks is a major issue in the research field of protection recommendation system. In response to the above questions, we found that the shilling attack has the features of short rating history, large number of rating and other potential features compared with normal user profiles. Therefore, we propose a neural network structure to learn the latent features between users and items and we construct shilling attack detection model based on neural network. The experimental results show that the detection method of this paper has achieved the expected goal. © 2019 IEEE.

关键词： Recommender systems

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A novel secure access method for remote databases based on mobile agents

A novel secure access method for remote databases based on m...

引用

5th International Conference on Natural Computation, ICNC 2009

作者： Huang, Jing Xiao, Yingyuan Liang, Yi Tianjin Key Laboratory of Intelligent Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin 300191 China

ISBN: (纸本)9780769537368

With the rapid development of network, some novel applications like remote database access, electric commerce, etc. bring forth many new requirements for network loads, network communication efficiency and network security. This paper adopts mobile agent technology to achieve remote access to databases. Compared to the traditional C/S computing model, this method can significantly improve the communication efficiency and system performance when a large number of data located at remote sites must be handled. In addition, the security of data can be enhanced to some extent by using message digest, encryption and decryption techniques on the results carried by mobile agents. The experimental result shows that this access method for remote databases based on mobile agents is security and feasible. Especially to a large number of remote data processing, this technology gets more advantages over the C/S computing model in the aspect of performance. © 2009 IEEE.

关键词： Mobile agents

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A Hippocampus Spatial Cognition Model based on Predictive Coding 43

A Hippocampus Spatial Cognition Model based on Predictive Co...

引用

43rd Chinese Control Conference, CCC 2024

作者： Yu, Naigong Lv, Zexuan Yan, Jinhan Beijing University of Technology Faculty of information Technology Beijing100021 China Beijing Key Laboratory of Computing Intelligence and Intelligent System Beijing100021 China

ISBN: (纸本)9789887581581

In current computation neuroscience, it is widely accepted that the mammalian entorhinal-hippocampus complex provides representations of spatial environment, exhibiting specific responses to particular locations and directions. Various computation models of spatial cell firing have been proposed to unravel the mysteries of spatial cognition representation in the brain. However, an increasing body of experimental evidence suggests that the brain operates more akin to a predictive system. Actively acquiring and utilizing limited environmental information, the brain constructs internal models during interaction with the external world, generating predictive representations of internal states following environmental changes. Building upon this premise, we propose a predictive coding theory-based entorhinal-hippocampus spatial cognition model. This model incorporates vestibular proprioceptive cues and border vector cells discharge responses to initially derive unimodal place cell discharge fields, followed by hippocampal place cells projecting to the entorhinal cortex via excitatory-inhibitory synaptic connections, ultimately generating periodic hexagonal grid cell discharge fields. Experimental results demonstrate that the neuronal discharge patterns obtained by this model align with physiological research findings, thereby providing new insights for further investigations into brain cognitive mechanisms. © 2024 Technical Committee on Control Theory, Chinese Association of Automation.

关键词： Mammals

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