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Operational semantics of ambient calculus

Operational semantics of ambient calculus

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SOSE 2005: IEEE International Workshop on Service-Oriented System engineering

作者： Zhang, Jing Jin, Ying Guo, De-Gui Liu, Lei Jin, Cheng-Zhi Key Laboratory of Symbolic Computation and Knowledge Engineering Ministry of Education of P.R.China Juin University Changchun 130012 China

ISBN: (纸本)0769524389

Mobile ambients is a process calculus for modeling mobile agents in wide-area networks. It has important theoretical and practical values in studying concurrent and mobile computation as well as the security of interactive systems. In this paper a frame structure is given for Mobile Ambients. First we introduce the concept of ambient calculus frame. Then we propose a construction method for translating an ambient definition into the frame definition, a transformation function is given based on the method. Next the movement and interaction of the code are discussed based on the frame structure. Finally an operating semantics is developed basing on the frame structure, an example of a frame and its execution are given. Introducing frame structure for ambient calculus is an attempt to provide languages support for asynchronous, distributed, and mobile programming. The ideas and methods in this paper can also be applied to other calculi with concurrency and mobility. © 2005 IEEE.

关键词： Mobile computing

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Information flow security for interactive systems

引用

International Conference on Embedded and Ubiquitous Computing, EUC 2005

作者： Jin, Ying Liu, Lei Zheng, Xiao-Juan Key Laboratory of Symbolic Computation and Knowledge Engineering Jilin University Ministry of Education of P.R. China Changchun 130012 China Software College Northeast Normal University Changchun 130117 China

ISBN: (纸本)3540308075

The use of the Internet raises serious behavioural issues regarding, for example, security and the interaction among agents that may travel across links. Model-building such interactive systems is one of the biggest current challenges in computer science. A general model, action calculi, has been introduced by Robin Milner to unify the various emerging disciplines of interactive behaviour. In this paper action calculi is used as an abstraction of interactive systems and information flow security properties of such systems are studied. At first an information flow analysis for static action calculi is presented to predict how data will flow both along and inside actions and its correctness is proved;Next basing on the result of the analysis information security properties of both static and dynamic action calculi are discussed;Finally a general relationship are established between the static notation of information flow security and the dynamic one. © IFIP International Federation for Information Processing 2005.

关键词： Interactive computer systems

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An integration of cotraining and KNN for LPU problem

An integration of cotraining and KNN for LPU problem

引用

2nd Indian International Conference on Artificial Intelligence, IICAI 2005

作者： Xin, RuiMing Zuo, WanLi Yang, Ping Key Laboratory of Symbol Computation and Knowledge Engineering College of Computer Science and Technology JiLin University Changchun 130012 China

ISBN: (纸本)0972741216

Under the framework of LPU (learning from positive data and unlabeled data), this paper originally proposes a three-step algorithm. First, Co-Training is employed for filtering out the "suspect positive" data from the unlabeled dataset U. If CoTraining filter out the most of positive data mixed in U, the remainder of U can be viewed as a negative set with a little noise. Second, a constrained KNN approach attempts to pick out the positive data from "suspect positive" dataset which is produced in first step. Those data picked out can be supplied to positive dataset P. Finally, a linear SVM will learn from both the purified U as negative and the expanded P as positive. Because of the algorithm's characteristic of automatic expanding positive dataset, the proposed algorithm especially performs well in situations where given positive dataset P is insufficient. A comprehensive experiment proves that our algorithm is preferable to the existing ones. Copyright © IICAI 2005.

关键词： Artificial intelligence

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Noise suppression of fluorescein angiogram sequences using bilateral filter

Noise suppression of fluorescein angiogram sequences using b...

引用

International Conference on Machine Learning and Cybernetics, ICMLC 2005

作者： Guo, Xiao-Xin Lu, Yi-Nan Xu, Zhi-Wen Liu, Zhan-Hui Wang, Yun-Xiao Pang, Yun-Jie Key Laboratory of Symbol Computation and Knowledge Engineering Jilin University Ministry of Education Qianjin Street 2699 Changchun 130012 China

ISBN: (纸本)078039092X

In this paper, a relatively flexible filter called extended bilateral filter is proposed, by which some particular filters can be designed via selecting an appropriate pixel of interest (POI) and defining a kernel for the filter according to some specified requirements. Based on the filter, a fluorescein-angiogram-oriented filter, high-intensity preserving (HIP) filter is introduced to solve the problems of high-intensity preservation when denoising. The results of the experiments show that the HIP filter has the ability of noise suppression, and the ability of high-intensity preservation, which can keep the intensities of bright pixels from degrading via distributing the weights adaptively according to the location and the intensity of each pixel. © 2005 IEEE.

关键词： Image processing

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An application of Fourier-Mellin transform in image registration

An application of Fourier-Mellin transform in image registra...

引用

Fifth International Conference on Computer and Information Technology, CIT 2005

作者： Guo, Xiaoxin Xu, Zhiwen Lu, Yinan Pang, Yunjie Key Laboratory of Symbol Computation and Knowledge Engineering Jilin University Ministry of Education Qianjin Street 2699 Changchun 130012 China

Fourier-Mellin transform (FMT) is frequently used in content-based image retrieval and digital image watermarking. This paper extends the application of FMT into image registration and proposes an improved registration algorithm based on FMT for the alignment of images differing in translation, rotation angle, and uniform scale factor. The proposed algorithm can eliminate the conversion from Cartesian to log-polar coordinates, avoid the process of interpolation required in the conversion, and obtain a more significant improvement than the conventional method using cross-correlation. Experiments show that the algorithm is accurate and robust regardless of white noise. © 2005 IEEE.

关键词： Fourier transforms

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A Distributed Q-Learning Algorithm for Multi-Agent Team Coordination

A Distributed Q-Learning Algorithm for Multi-Agent Team Coor...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Jing Huang Bo Yang Da-You Liu Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun China

Q-learning is an effective model-free reinforcement learning algorithm. However, Q-learning is centralized and competent only for single agent learning but not multi-agent learning because in later case the size of state-action space is huge and will grow exponentially with the number of agents increasing. In the paper we present a distributed Q-learning algorithm to solving this problem. In our algorithm, the tasks of learning optimal action policy are distributed to each agent in team but not a central agent. In order to reduce the size of action-state space of multi-agent team we introduce a state-action space sharing strategy of agent team, through which one agent in team can use the states already explored by other agents before and need not take time to explore these states again. Additionally, our algorithm has the ability to allocate sub-goals dynamically among agents according to environment changing, which can make agent team coordinate more efficiently. Experiments show the efficiency of our algorithm when it is applied to the benchmark problem of predator-prey pursuit game, also called pursuit game, in which a team of predators coordinate to capture a prey.

关键词： Machine learning algorithms Pursuit algorithms Multiagent systems Educational institutions Computer science Educational technology Laboratories knowledge engineering Computer science education Learning systems

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Reasoning about ceteris paribus preference with constraint hierarchy framework

Reasoning about ceteris paribus preference with constraint h...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Yong-Gang Zhang Ji-Gui Sun Key Laboratory for Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun China

CP-networks provide a convenient means for expressing preferences in reasoning, but it is not good at handling preferences with hard constraints. The paper proposes a new approach, which transforms the CP-network with hard constraints into one constraint hierarchy, therefore one could process preferences and constraints in a single formalism with fruitful constraint solving algorithms. Furthermore, illustrates it with some examples, proves that the transformation preserves the ceteris paribus property and presents some complexity results. Finally compares it with related work and concludes the paper.

关键词： Artificial intelligence Graphical models Bayesian methods Sun Educational institutions Computer science Educational technology Laboratories knowledge engineering Computer science education

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Qualitative spatial relationships cleaning for spatial data mining

Qualitative spatial relationships cleaning for spatial data ...

引用

International Conference on Machine Learning and Cybernetics, ICMLC 2005

作者： Sun, Hai-Bin Li, Wen-Hui Key Laboratory of Symbol Computation and Knowledge Engineering of the Ministry of Education College of Computer Science and Technology Jilin University Changchun 130012 China

ISBN: (纸本)078039092X

In this article, we investigate the problem of preparing qualitative spatial relations before implementing spatial data mining by checking consistency in a constraint network, which includes topological and cardinal directional relations between pairs of spatial objects. We aim to explore potential spatial relations and possible inconsistency among the data of relationships for enforcing the correctness of spatial data mining. This task is carried out through qualitative spatial reasoning method, specifically consistency checking. We try to lay the theoretical foundation for this kind of problem. Instead of using conventional composition tables, we investigate the interactions between topological and cardinal directional relations with the aid of rules. These rules are shown to be sound, i.e. the deductions are logically correct. Based on these rules, an improved constraint propagation algorithm is introduced to enforce the path consistency. An example is presented to show the utility of these rules. © 2005 IEEE.

关键词： Data mining

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Super-resolution reconstruction from fluorescein angiogram sequences

Super-resolution reconstruction from fluorescein angiogram s...

引用

International Conference on Intelligent Computing, ICIC 2005

作者： Guo, Xiaoxin Xu, Zhiwen Lu, Yinan Liu, Zhanhui Pang, Yunjie Key Laboratory of Symbol Computation and Knowledge Engineering Jilin University Ministry of Education Qianjin Road 10# Changchun 130012 China

ISBN: (纸本)9783540282266

Intensity degradations are a familiar problem for fluorescein angiogram sequences. In this paper, we attempt to super-resolve a fluorescein angiogram, and to keep the high intensity pixels from degrading. To this end, we incorporate a new constraint, called intensity constraint, to Miller's regularization formulation with a smoothness constraint. Considering the specified requirement for fluorescein angiograms, we also modify the Q-th order converging algorithm for implementation purpose. In our scheme, including its formulation and implementation, super-resolution reconstruction can not only handle the traditional problems, such as blur, decimation, and noise, but also achieve an important feature, intensity preservation. The experiments show that our approach has satisfactory results in the two aspects. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Image reconstruction

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A Fuzzy neural network system based on generalized class cover and particle swarm optimization

A Fuzzy neural network system based on generalized class cov...

引用

International Conference on Intelligent Computing, ICIC 2005

作者： Huang, Yanxin Wang, Yan Zhou, Wengang Yu, Zhezhou Zhou, Chunguang College of Computer Science and Technology Jilin University Key Laboratory for Symbol Computation and Knowledge Engineering of the National Education Ministry Changchun 130012 China

A voting-mechanism-based fuzzy neural network system is proposed in this paper. When constructing the network structure, a generalized class cover problem is presented and its two solving algorithm, an improved greedy algorithm and a binary particle swarm optimization algorithm, are proposed to get the class covers with relatively even radii, which are used to partition fuzzy input space and extract fewer robust fuzzy IF-THEN rules. Meanwhile, a weighted Mamdani inference mechanism is adopted to improve the efficiency of the system output and a real-valued particle swarm optimization-based algorithm is used to refine the system parameters. Experimental results show that the system is feasible and effective. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Neural networks

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