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A Robust Descriptor based on Weber's Law

A Robust Descriptor based on Weber's Law

引用

26th IEEE Conference on computer Vision and Pattern Recognition (CVPR 2008), vol.8

作者： Jie Chen Shiguang Shan Guoying Zhao Xilin Chen Wen Gao Matti Pietikainen School of Computer Science and Technology Harbin Institute of Technology Harbin China Machine Vision Group Department of Electrical and Information Engineering University of Oulu Finland Languages Informatics Systems and Software Engineering Department Faculty of Computer Science Chinese Academy and Sciences Beijing China

Inspired by Weber's Law, this paper proposes a simple, yet very powerful and robust local descriptor, Weber Local Descriptor (WLD). It is based on the fact that human perception of a pattern depends on not only the change of a stimulus (such as sound, lighting, et al.) but also the original intensity of the stimulus. Specifically, WLD consists of two components: its differential excitation and orientation. A differential excitation is a function of the ratio between two terms: One is the relative intensity differences of its neighbors against a current pixel;the other is the intensity of the current pixel. An orientation is the gradient orientation of the current pixel. For a given image, we use the differential excitation and the orientation components to construct a concatenated WLD histogram feature. Experimental results on Brodatz textures show that WLD impressively outperforms the other classical descriptors (e.g., Gabor). Especially, experimental results on face detection show a promising performance. Although we train only one classifier based on WLD features, the classifier obtains a comparable performance to state-of-the-art methods on MIT+CMU frontal face test set, AR face dataset and CMU profile test set.

关键词： Robustness Face detection Humans Content addressable storage Testing Psychology Laboratories Machine intelligence Information processing computers

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Using DSL for Automatic Generation of software Connectors

Using DSL for Automatic Generation of Software Connectors

引用

International IEEE Conference on Commercial-off-the-Shelf (COTS)-Based software Systems

作者： Tomas Bures Michal Malohlava Petr Hnetynka Department of Software Engineering Faculty of Mathematics and Physics Charles University Prague Czech Republic Institute of Computer Science Academy of Sciences슠of the슠Czech Republic Prague Czech Republic

Component-based engineering is a recognized paradigm, which models an application as a collection of reusable components. The key idea behind components is that they contain only the business logic and communicate with one another only via well-defined interfaces. The communication paths among components (so called bindings) are in modern component systems realized by software connectors, which allow explicit modeling of communication and also its implementation at runtime. An important aspect of using connectors is the possibility of their automatic generation, which saves a significant amount of development work. However, the generation itself is not a trivial task, since there is a big semantic gap between the abstract specification of a connector at design time and its implementation at runtime. In this paper, we present an approach to generating implementations of software connectors. The approach is based on a new domain specific language for describing templates of connector implementations and a transformation framework using the Strate-go/XT term rewriting system for generating source code of connectors.

关键词： DSL Connectors Application software Runtime software reusability computer architecture Middleware Network servers software systems software engineering

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The Power of MOF-Based Meta-modeling of Components

The Power of MOF-Based Meta-modeling of Components

引用

Advanced software engineering and Its Applications, ASEA

作者： Petr Hnetynka Frantisek Plasil Department of Software Engineering Faculty of Mathematics and Physics Charles University Prague Czech Republic Institute of Computer Science Academy of Sciences슠of the슠Czech Republic Prague Czech Republic

To allow comfortable and easy development, component systems have to provide a rather a big set of development supporting tools including at least a tool for composition and repository for storing and retrieving components. In this paper, we evaluate and present advantages of using MOF and meta-modeling during definition of component system and also during development of the supporting tools. Most of the presented arguments are based on a broad practical experience with designing the component systems SOFA and SOFA 2; the former designed in the classical ad hoc manual way, while the latter via meta-modeling.

关键词： Metamodeling Application software software engineering computer science Mathematics Physics Manuals Containers Large-scale systems Natural languages

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A Hybrid Model for Distributed Semantic Queries

A Hybrid Model for Distributed Semantic Queries

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The 9th International Conference for Young computer Scientists(第九届国际青年计算机大会)

作者： Yinglong Ma Beihong Jin Shipeng Zhang School of Computer Science and Technology North China Electric Power University Beijing 102206 P.R. Technology Center of Software Engineering Institute of Software Chinese Academy of Sciences P.O.Box School of Computer Science and Technology North China Electric Power University Beijing 102206 P.R.

Semantic based queries are greatly paid attention to because its aim is to help users to find what they really want. In this paper, we proposed an efficient hybrid model for distributed semantic queries based on open distributed environments. Meanwhile, a feasible ranking strategy based on semantic overlap is introduced to rank answering results of semantic queries from multiple sources. Multi-agent technologies can be successfully applied to develop our case system across multiple and distributed ontologies. The experimental evaluations show that our approximate model is efficient to perform semantic query tasks in heterogenous environments.

关键词： ontology multi-agent system distributed semantic query.

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Prioritizing Default Rules Embedded in Description Logic Knowledge Base

Prioritizing Default Rules Embedded in Description Logic Kno...

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ACIS International Conference on software engineering, Artificial Intelligence, Networking, and Parallel/Distributed Computing (SNPD)

作者： Shaohua Liu Junsheng Yu Yinglong Ma Xu Zhang Xiaoming Liu Hansheng Su International Research Laboratory School of Telecommunication Engineering Beijing University of Posts and Telecommunications Beijing China Technology Center of Software Engineering Institute of Software of Chinese Academy of Sciences Beijing China School of Computer Science and Technology North China Electric Power University Beijing China

ISBN: (纸本)9780769532639

Description logic based semantic query needs complete information from sources of knowledge where available information is often incomplete. To solve such incomplete reasoning problem, this paper embedded default logic into the description logic knowledge base, meanwhile prioritized the default rules, which preferred more specific default rules over more general ones. Then, an original incomplete query could be transformed into a complete query relative to the extended knowledge base, by checking default satisfiability of complex concept in accord with the query. Furthermore, the default satisfiability can be detected through a new extended tableau algorithm.

关键词： Cognition Knowledge based systems Algorithm design and analysis Materials Data structures Knowledge representation Boolean functions

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A Prioritized Default Extension to Description Logic Knowledge Base

A Prioritized Default Extension to Description Logic Knowled...

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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Shaohua Liu Junsheng Yu Yinglong Ma Bing Xu Yuan Mai Min Zhou International Research Laboratory School of Telecommunication Engineering Beijing University of Posts and Telecommunications Beijing China Technology Center of Software Engineering Institute of Software of Chinese Academy of Sciences Beijing China School of Computer Science and Technology North China Electric Power University Beijing China

Although some efforts have been made to endow description logics with default reasoning capabilities, we hardly heard about the considerable attention to the preference of default rules in extended description logic. This paper makes a new prioritized default extension to the description logic knowledge base for default reasoning. Introducing and prioritizing default rules, it provides the mathematic foundation for querying information from original incomplete description logic knowledge base. Thus, a complete information query based on the integrated systems with default information can boil down to checking default satisfiability of the complex concept.

关键词： Birds Fuzzy logic Mathematics Fuzzy systems Laboratories Knowledge engineering Power engineering and energy software engineering computer science Inference mechanisms

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Checking Session-Oriented Interactions between Web Services

Checking Session-Oriented Interactions between Web Services

引用

Euromicro Conference on software engineering and Advanced Applications (SEAA)

作者： Pavel Parizek Jiri Adamek Faculty of Mathematics and Physics Department of Software Engineering Distributed Systems Research Group Charles University Prague Czech Republic Institute of Computer Science Academy of Sciences슠of the슠Czech Republic Czech Republic

Although Web services are generally envisioned as being stateless, some of them are implicitly stateful. The reason is that the Web services often work as front-ends to enterprise systems and are used in a session-oriented way by the clients. Contrary to the case of stateless services, for a stateful Web service there exist constraints to the order in which the operations of the service may be invoked. However, specification of such constraints is not a standard part of a Web service interface, and compliance with such constraints is not checked by the standard Web service development tools. Therefore, we propose in this paper to extend a web service interface by a constraint definition that is based on behavior protocols. Also, we implemented a tool that checks whether a given BPEL code complies with the constraints of all stateful web services it communicates with. The key idea behind the tool is to translate the BPEL code into Java and then to check the Java program using Java PathFinder with behavior protocol extension.

关键词： Web services Java software engineering Simple object access protocol Standards development XML Application software Mathematics Physics computer science

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A new circuit representation method for Analog circuit design automation

A new circuit representation method for Analog circuit desig...

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Congress on Evolutionary Computation

作者： Feng Wang Yuanxiang Li Kangshun Li Zhiyi Lin Department of Computer Science Wuhan University Kowloon Hong Kong China Department of Computer Science City University of Hong Kong Kowloon Hong Kong China Laboratory of Software Engineering Wuhan University of China Wuhan China School of Information Engineering Jiangxi China and Institute of Automation Chinese Academy of Sciences Jiangxi University of Science and Technology Beijing China

The Analog circuits are very important in many high-speed applications such as communications. Since the size of analog circuit is becoming larger and more complex, the design is becoming more and more difficult. This paper proposes a new circuit representation method based on a two-layer evolutionary scheme with genetic programming (TLGP), which uses a divide-and-conquer approach to evolve the analog circuits. This representation has the desirable property which is more helpful to generate expectant circuit graphs. And it is capable of generating various kinds of circuits by evolving the circuits with dynamical size, circuit topology, and component values. The experimental results on the designs of the voltage amplifier and the low-pass filter show that this method is efficient.

关键词： Analog circuits Evolution (biology) Genetics Encoding Joining processes Evolutionary computation SPICE

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Triangular arbitrage in foreign exchange rate forecasting markets

Triangular arbitrage in foreign exchange rate forecasting ma...

引用

Congress on Evolutionary Computation

作者： Feng Wang Yuanxiang Li Li Liang Kangshun Li Department of Computer Science Wuhan University Kowloon Hong Kong China Department of Computer Science City University of Hong Kong Kowloon Hong Kong China Laboratory of Software Engineering Wuhan University of China Wuhan China Computer Science City University of Hong Kong Kowloon Hong Kong China School of Information Engineering Jiangxi University of Science and Technology Jiangxi China Institute of Automation Chinese Academy and Sciences Beijing China

The non-existence of triangular arbitrage in an efficient foreign exchange markets is widely believed. In this paper, we deploy a forecasting model to predict foreign exchange rates and apply the triangular arbitrage model to evaluate the possibility of an arbitrage opportunity. Surprisingly, we substantiate the existence of triangular arbitrage opportunities in the exchange rate forecasting market even with transaction costs. This also implies the inefficiency of the market and potential market threats of profit-seeking investors. In our experiments, neural network based model with back-propagation (BP-NN) is used for exchange rate forecasting.

关键词： Exchange rates Forecasting Artificial neural networks Training Predictive models Prediction algorithms Mathematical model

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Development and control of dolphin-like underwater vehicle

Development and control of dolphin-like underwater vehicle

引用

American Control Conference (ACC)

作者： Yonghui Hu Long Wang Junzhi Yu Jiyan Huo Yingmin Jia Languages Informatics Systems and Software Engineering Department Faculty of Computer Science Peking University Beijing China Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Academy of Sciences Beijing China Seventh Research Division Beihang University Beijing China

This paper is concerned with prototype development and motion control of a dolphin-like underwater robot. The propulsion and maneuvering of the robotic dolphin are realized with the flapping motion of the mechanical flippers and the combined heaving and pitching motions of the fluke. Mechanical design and control of the flipper apparatus and the flexible tail mechanism are presented. Through coordinated control of the propulsors, several swimming movements are designed. Preliminary experimental results verify the effectiveness of the proposed design scheme.

关键词： Underwater vehicles Dolphins Robot kinematics Propulsion Marine animals Motion control Tail Robot sensing systems Control systems Automotive engineering

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