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检索条件"机构=Computer and Inf. Science and Engineering"

共 165 条记录，以下是81-90 订阅

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Latent Ontological Feature Discovery for Text Clustering

Latent Ontological Feature Discovery for Text Clustering

引用

IEEE International Conference on Research, Innovation and Vision for the Future

作者： Van T. T. Duong Tru H. Cao Cuong K. Chau Tho T. Quan Fac. of Inf. Technol. & Appl. Math. Ton Duc Thang Univ. Ho Chi Minh City Vietnam Faculty of Computer Science and Engineering HCM City University of Technology Ho Chi Minh City Viet Nam

The content of a text is mainly defined by keywords and named entities occurring in it. In particular for news articles, named entities are usually important to define their semantics. However, named entities have ontological features, namely, their aliases, types, and identifiers, which are hidden from their textual appearance. In this paper, we explore weighted combinations of those latent named entity features with keywords for text clustering. To that end, the traditional vector space model is adapted with multiple vectors defined over spaces of entity names, types, name-type pairs, identifiers, and keywords. Clustering quality is evaluated by both of the self purity-separation type and the relative comparison type of measures. Hard and fuzzy clustering experiments of the proposed model on selected data subsets of Reuters-21578 are conducted and evaluated.

关键词： Ontologies Vectors Cities and towns inf.rmation technology Mathematics computer science Labeling inf.rmation retrieval Clustering algorithms Entropy

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A study of the adoption of self-service technologies by consumers in convenience stores

A study of the adoption of self-service technologies by cons...

引用

International Conference on Advanced Communication Technology (ICACT)

作者： Dong-Her Shih I-Ching Chen Shueh-Cheng Hu Dept. of Inf. Manage. Nat. Yunlin Univ. of Sci.&Technol. Dept. of Information Management National Yunlin University of Science & Technology Taiwan Dept. of Information Management ChungChou Institute of Technology Taiwan Dept. of Computer Science & Communication Engineering Providence University Taiwan

The emerging self-service technologies (SSTs) make people's daily life become more and more convenient. The users' attitude toward and requirements about the SST also become diversified due to its widely applicable domains. This research aims to establish a model for investigating the factors that will affect the adoption of SST by consumers of convenience stores. Based on the technology acceptance model and prior research, a hypothesis model was built, and then was validated through an advanced statistics tool - structured equation model. The findings can guide the designers of the corresponding equipments and software to create a friendly and efficient environment for service consumers.

关键词： Equations inf.rmation management computer science Statistics Machine intelligence Merchandise inf.rmation technology Costs Customer service Privacy

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Simulation Experiment Result Forecast Method Based on Support Vector Machine

Simulation Experiment Result Forecast Method Based on Suppor...

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International Conference on Intelligent Computation Technology and Automation, ICICTA

作者： Shuguang Zhu Zhiqiang Li Xiaofeng Hu Guangya Si Liyan Qian Qian mo Guangqi Huang Center for Eng. Design & Res. Headquarters of Gen. Equip. Beijing China Dept. of Inf. Oper. & Command Training Nat. Defense Univ. Beijing China School of Electronics Engineering and Computer Science Peking University Beijing China Network Center Beijing Technology and Business University Beijing China School of Information System and Management National University of Defense Technology Changsha China

Simulation experiment result forecast method based on support vector machine (SVM) is put forward and elaborated. Two-class and multiclass forecast experiments are successfully performed. And SVMs are proved to be pow... 详细信息

ISBN: (纸本)9781424447411

关键词： Predictive models Support vector machines Support vector machine classification Analytical models Costs Training data Technology forecasting Design engineering Management training Solid modeling

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Locally adaptive selection of parameters in regularization-based denoising algorithms

Locally adaptive selection of parameters in regularization-b...

引用

5th IASTED International Conference on Signal Processing, Pattern Recognition, and Applications, SPPRA 2008

作者： Someya, Katsuhiko Kameyama, Keisuke Department of Risk Engineering Graduate school of Systems and Information Engineering University of Tsukuba 1-1-1 Tennoudai Tsukuba Ibaraki 305-8573 Japan Department of Computer Science Grad. Sch. of Sys. and Inf. Eng. University of Tsukuba 1-1-1 Tennoudai Tsukuba Ibaraki 305-8573 Japan

ISBN: (纸本)9780889867178

Noise removal from an observed signal is an important problem in signal processing. PDE-based methods have been widely used because of their common property being good at removing the noise while preserving the edges. These methods restore images by modifying towards cartoon-like images. Therefore, other important features such as textures and certain details tend to be degraded in the denoising process. In this work, we propose a modified variational denoising algorithm that adaptively selects the parameters according to the local nature of the image. In order to estimate the locally appropriate parameters, neural network based learning is employed. This method can adaptively change the denoising level by changing the regularization parameter and the smoothing kernel according to the local image. The results of denoising by the proposed method show both visual and objective improvements.

关键词： Parameter estimation

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Degraded Document Image Enhancement Using Hybrid Thresholding and Mathematical Morphology

Degraded Document Image Enhancement Using Hybrid Thresholdin...

引用

Indian Conference on computer Vision, Graphics & Image Processing (ICVGIP)

作者： Nija Babu Preethi N.G. S.S. Shylaja Department of Computer Science and Engineering PES Institute of Technology Bangalore India Dept. of Inf. Sci. & Eng. PES Inst. of Technol. Bangalore

The paper presents a hybrid thresholding approach for binarization and enhancement of degraded documents. Historical documents contain inf.rmation of great cultural and scientific value. But such documents are frequently degraded over time. Digitized degraded documents require specialized processing to remove different kinds of noise and to improve readability. The approach for enhancing degraded documents uses a combination of two thresholding algorithms. First, iterative global thresholding is applied to the smoothed degraded image until the stopping criteria is reached. Then a threshold selection method from gray level histogram is used to binarize the image. The next step is detecting areas where noise still remains and applying iterative thresholding locally. A method to improve the quality of textual inf.rmation in the document is also done as a post processing stage, thus making the approach efficient and better suited for character recognition applications.

关键词： Degradation Image enhancement Morphology Iterative algorithms Paper technology Histograms Pixel computer science Character recognition Ink

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Markov Chain-Based Trust Model for Analyzing Trust Value in Distributed Multicasting Mobile Ad Hoc Networks

Markov Chain-Based Trust Model for Analyzing Trust Value in ...

引用

IEEE Asia-Pacific Conference on Services Computing (APSCC)

作者： Ben-Jye Chang Szu-Liang Kuo Ying-Hsin Liang De-Yu Wang Department of Computer Science and Information Engineering Chaoyang University of Technology Taiwan Dept. of Comput. Sci. & Inf. Eng. Nan-Kai Univ. of Technol.

The multicast mobile ad-hoc network (multicast MANET) is proposed for a sender sending packets to several receivers through a multicast session. Since members of a multicast group changes frequently, the issue of supporting secure authentication and authorization in multicast MANET becomes more critical than the network provided a fixed central authentication (CA) server. This work thus proposes a two-step secure authentication approach for the multicast MANET. First, a Markov chain trust model is proposed to determine the trust value (TV) for each one-hop neighbors. A nodepsilas trust value is analyzed from its previous trust manner in this group. The proposed trust model is proven as an ergodic continuous-time Markov chain model. Second, a node with the highest TV of a group will be selected as the CA server. For increasing reliability, the node with the second highest TV will be selected as the backup CA server that will take over CA when CA fails. The procedures of the secure authentication for group management are detailed. The security analysis of each procedure is analyzed to guarantee that the proposed approach achieves a secure reliable authentication in multicast MANET. Numerical results indicate that the analytical trust value of each mobile node is very close to that of simulation under various situations. The speed of the convergence of the analytical trust value shows that the analytical results are independent of initial values and the trust classes.

关键词： Mobile ad hoc networks Authentication Peer to peer computing Wireless sensor networks Network servers Ad hoc networks TV Multicast protocols Data communication computer networks

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An RFID-Based Automatic Identification System on Modern Grain Logistics

An RFID-Based Automatic Identification System on Modern Grai...

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International Conference on Management of e-Commerce and e-Government, ICMECG

作者： Zhuang Er Fei Yu Lian Jin Gong Lian Zhejiang Gongshang University Hangzhou Zhejiang CN Sch. of Comput. Sci. & Inf. Eng. Zhejiang Gongshang Univ. Hangzhou School of Computer Science and Information Engineering Zhejiang Gongshang University Hangzhou Zhejiang China

ISBN: (纸本)9781479965441

Radio frequency identification (RFID) is a newly-developed automatic identification technology, superior qualities of which would make it possible to substitute the bar code system in the future. Most importantly, it plays a very important role in the area of logistics. Based on an analysis of the current situation of grain logistics, this paper has studied the applications of RFID technology in each link of grain logistics management, and designed a RFID-based automatic identification system for modern grain logistics.

关键词： Radiofrequency identification Logistics Vehicles Warehousing Algorithm design and analysis Partitioning algorithms Transportation

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Breaking instance I of new TTM cryptosystems

Breaking instance I of new TTM cryptosystems

引用

International Conference on Communications, Circuits and Systems (ICCCAS)

作者： Xuyun Nie Xin Jiang Lei Hu Jintai Ding Fengli Zhang University of Electronic Science and Technology of China Chengdu CN State Key Lab. of Inf. Security Grad. Sch. Chinese Acad. of Sci. Beijing Chinese Academy of Sciences Beijing Beijing CN School of Computer Science and Engineering University of Electronic Science and Technology Chengdu China

TTM is a type of multivariate public key cryptosystem. In 2007, the inventor of TTM proposed two new instances of TTM to resist the existing attack, in particular, the Nie et al attack. The two instances are claimed to achieve a security of 2 109 against Nie et al attack. In this paper, we show that the instance I is still insecure, and in fact, it do not achieve a better design in the sense that we can find a ciphertext-only attack utilizing the First Order Linearization Equations while for the previous version of TTM, only Second Order Linearization Equations can be used in the beginning stage of the previous attack. Different from previous attacks, we use an iterated linearization method to break the instances I. For any given valid ciphertext, we can find its corresponding plaintext within 2 31 F 2 to power of 8 -computations after performing once for any public key a computation of complexity less than 2 44 . Our experiment result shows we have unlocked the lock polynomials after several iterations, though we do not know the detailed construction of lock polynomials.

关键词： Equations Polynomials Cryptography Public key Public key cryptography Construction industry Security

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A Fine-Grained Digital Rights Transfer Policy and Trusted Distribution and Enforcement

A Fine-Grained Digital Rights Transfer Policy and Trusted Di...

引用

International Conference on Computational Intelligence and Security

作者： Zhiyong Zhang Qingqi Pei Jianfeng Ma Lin Yang Kefeng Fan Key Lab of Computer Network & Information Security (Ministry of Education) Xidian University Xi'an Shaanxi China Electron. Inf. Engineering Coll. Henan University of Science and Technology Luoyang Henan China Research Institute China Electronic Equipment and Systems Engineering Corporation Beijing China China Electronics Standardization Institute Beijing China

ISBN: (纸本)9781424441969

Existing digital rights management (abbr. DRM) approaches lack a flexible fine-grained digital rights transfer policy, also could not guarantee the trustworthy distribution and enforcement of the transferable rights policy by using DRM agent. First, descriptions of extensible ODRL-based rights transfer policy were presented to complete OMA REL. Then, we introduced a remote attestation mechanism among entities, such as RI and DRM agent, based on trusted computing platform in order to implement trusted distribution and enforcement of the policy, also mainly proposed trustworthy distribution protocols of the rights object and transfer, as well as a trusted policy enforcement protocol. Final, the approach is made comparison with existing DRM schemes as to several functionality aspects on transferable rights granularity, restricted sharing, temporal limitation, trust of DRM agent. A conclusion is drawn that the proposed scheme is not restricted within local domain environment, and accomplishes fine-grained rights transfer and contents sharing between users without direct participations of rights issuer or local domain manager.

关键词： Protocols Content management inf.rmation security Licenses Computational intelligence computer security computer networks computer science education Electrons Electronic equipment

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Morphological NNs with orthonormal basis dendrites 44

Morphological NNs with orthonormal basis dendrites

引用

44th Annual ACM Southeast Conference, ACMSE 2006

作者： Barmpoutis, Angelos Computer and Inf. Science and Engineering University of Florida Gainesville FL United States

ISBN: (纸本)1595933158

In this paper, a novel model of Morphological Neural Networks (MNN) is presented. MNNs use neurons with dendritic structure that bear a more faithful resemblance to the biological neurons of the celebral cortex than those used in various artificial neural networks. MNNs have the high capability of resolving some difficult non-linear problems and are getting more and more applicable. In this work we develop a new model of MNNs that are more powerful since each dendrite can work on a different orthonormal basis than the other dendrites in order to optimize the performance of the Orthonormal Basis Morphological Neural Network (OBMNN). OBMNNs compress automatically their size and show significantly better learning capabilities than the regular MNNs, which are a sub-group of OBMNNs. Validation experimental results are presented that demonstrate superior learning performance of OBMNNs over regular MNNs,.

关键词： Neural networks

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