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18th Conference on Computational Linguistics and Speech Processing, ROCLING 2006

作者： Huang, Chung-Chi Chang, Jason S. Dept. of Information Systems and Application Taiwan International Graduate Program National Tsing Hua University Hsin Chu Taiwan Taiwan International Graduate Program Academia Sinica Nankang Taiwan Dept. of Computer Science National Tsing Hua University Hsin Chu Taiwan

We present a new method for learning to parse a bilingual sentence using Inversion Transduction Grammar trained on a parallel corpus and a monolingual treebank. The method produces a parse tree for a bilingual sentence, showing the shared syntactic structures of individual sentence and the differences of word order within a syntactic structure. The method involves estimating lexical translation probability based on a word-aligning strategy and inferring probabilities for CFG rules. At runtime, a bottom-up CYK-styled parser is employed to construct the most probable bilingual parse tree for any given sentence pair. We also describe an implementation of the proposed method. The experimental results indicate the proposed model produces word alignments better than those produced by Giza++, a state-of-the-art word alignment system, in terms of alignment error rate and F-measure. The bilingual parse trees produced for the parallel corpus can be exploited to extract bilingual phrases and train a decoder for statistical machine translation.

关键词： Forestry

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Reducing reconfiguration time of reconfigurable computing systems in integrated temporal partitioning and physical design framework 20

Reducing reconfiguration time of reconfigurable computing sy...

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20th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2006

作者： Mehdipour, Farhad Zamani, Morteza Saheb Ahmadifar, Hamid Reza Sedighi, Mehdi Murakami, Kazuaki Amirkabir University of Technology IT and Computer Engineering Department #424 Hafez Ave. Tehran Iran Kyushu University Dep. of Informatics Graduate School of Information Science and Electrical Engineering Fukuoka Japan Guilan University Engineering Faculty Rasht Iran

ISBN: (纸本)1424400546

In reconfigurable systems, reconfiguration latency is a very important factor impact the system performance. In this paper, a framework is proposed that integrates the temporal partitioning and physical design phases to perform a static compilation process for reconfigurable computing systems. A temporal partitioning algorithm is proposed which attempts to decrease the time of reconfiguration on a partially reconfigurable hardware, This algorithm attempts to find similar single or pair of operations between subsequent partitions. Considering similar pairs instead of single nodes brings about less complexity for routing process. By using this technique, smaller reconfiguration bit-stream is obtained, which directly decreases the reconfiguration overhead time at the run-time. A complementary algorithm attempts to increase the similarity of subsequent partitions by searching for similar pairs and using a technique called dummy node insertion, An incremental physical design process based on similar configurations produced in the partitioning stage improves the metrics over iterations. © 2006 IEEE.

关键词： computer systems

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The cache replacement problem for multimedia object caching

The cache replacement problem for multimedia object caching

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1st International Conference on Semantics, Knowledge and Grid, SKG 2005

作者： Qu, Wenyu Li, Keqiu Shen, Hong Jin, Yingwei Nanya, Takashi Graduate School of Information Science Japan Advanced Institute of Science and Technology 1-1 Asahidai Nomi Ishikawa 923-1292 Japan College of Computer Science and Technology Dalian Maritime University No 1 Linghai Road Dalian 116026 China University of Tokyo 4-6-1 Komaba Meguro-ku Tokyo 153-8904 Japan Department of Computer Science and Engineering Dalian University of Technology No 2 Linggong Rd. Ganjingzi Dist. Dalian 116024 China

ISBN: (纸本)0769525342

Multimedia object caching, by which the same multimedia object can be adapted to diverse mobile appliances through the technique of transcoding, is an important technology for improving the scalability of web services, especially in the environment of mobile networks. The performance of multimedia object caching mainly depends on how the objects are selected to be removed for a new object (multimedia object replacement) and where the different versions of a multimedia object are placed (multimedia object placement). In this paper, we address the problem of cache replacement for multimedia object caching. We first propose an optimal solution for this problem. The performance objective is to minimize the total access cost by considering both transmission cost and transcoding cost. The performance of the proposed solution is evaluated with a set of carefully designed simulation experiments for various performance metrics over a wide range of system parameters. The simulation results show that our solution consistently and significantly outperforms comparison solutions in terms of all the performance metrics considered. © 2006 IEEE.

关键词： Cache memory

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A privacy-enhanced access control

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Systems and computers in Japan 2006年第5期37卷 77-86页

作者： Saito, Takamichi Umesawa, Kentaro Okuno, Hiroshi G. Department of Computer Science Faculty of Science and Technology Meiji University Kawasaki 214-8571 Japan Graduate School of Science and Technology Science University of Tokyo Noda 278-8510 Japan Department of Intelligence Science and Technology Graduate School of Informatics Kyoto University Information Processing Society of Japan

It is sometimes necessary to access a server anonymously when the Internet or an electronic commerce application is used. In the present paper, for this need there is proposed a new system that uses an SPKI (Simple Public Key Infrastructure) framework in order to provide service with an emphasis on privacy. The proposed system does not require ID information and other personal information to be presented to the server. In short, only the information relating to the corresponding service is included in the certificate submitted to the server for utilization of the service, and not the ID information of the client. However, even though this is a system of anonymous access, it is not a framework that allows unlimited access, such as anonymous FTP (File Transfer Protocol). The SPKI framework itself only determines the format of the certificate, and does not provide a methodology for selecting or managing users. Therefore, in this paper, a new framework is proposed, and controlled anonymous access is shown to be obtainable by this framework. This paper will also discuss advantages of the proposed system, its anonymity, management, security, and the processing for certificate revocation. © 2006 Wiley Periodicals, Inc.

关键词： Data privacy

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Controlling the Perceived Vibrational Frequency and Amplitude of a Voice-Coil-Type Tactor

Controlling the Perceived Vibrational Frequency and Amplitud...

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International Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (HAPTICS)

作者： M. Niwa H. Noma Y. Yanagida K. Hosaka R.W. Lindeman Graduate School of Information Science and Technology Osaka Institute of Technology Japan ATR Media Information Science Research Laboratories Japan Faculty of Science and Technology Meijo University Japan Department of Computer Science Worcester Polytechnic Institute USA

When designing a vibrotactile information display, it is important to present correct, stable stimulation. However, the mechanical stability of the vibration is affected by many conditions such as how the vibrators are attached to the person, where they are attached, and other factors. In order to maintain the target frequency and amplitude of the vibration independent of the affective factors, we propose a feedback method for vibrotactile displays.

关键词： Vibration control Frequency Transfer functions Displays information science Stability Feedback Haptic interfaces Laboratories computer science

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Test environment for embedded cores-based system-on-chip (SOC) - Development and methodologies

Test environment for embedded cores-based system-on-chip (SO...

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25th IASTED International Conference on Modelling, Identification, and Control, MIC 2006

作者： Das, Sunil R. Biswas, Dhruv Petriu, Emil M. Assaf, Mansour H. Sahinoglu, Mehmet School of Information Technology and Engineering Faculty of Engineering University of Ottawa Ottawa ON K1N 6N5 Canada Department of Computer and Information Science Troy University Montgomery AL 36103 United States

ISBN: (纸本)0889865515

The evolution of the embedded cores-based design paradigm in recent times has created numerous challenging problems for the test design community. To develop suitable test environment and appropriate test methodologies for digital cores-based system-on-chip (SOC) is a fascinating area of research today. This paper attempts to develop viable solution options to these problems based on cores constructed from ISCAS 85 combinational and ISCAS 89 sequential benchmark circuits. The wrapper that separates the core under test from other cores is assumed to be IEEE P1500-compliant. The cores and test access mechanism (TAM) are described in the paper using Verilog HDL, while TAM is implemented as a plain signal transport medium, being shared by all the cores in the SOC. The fault injection is done by a simulator that also generates the tests for the core. The fault simulation process is carried out after successful compilation of the cores, the individual core selection being done by the program running in the background.

关键词： System-on-chip

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Low-Cost IP Core Test Using Multiple-Mode Loading Scan Chain and Scan Chain Clusters

Low-Cost IP Core Test Using Multiple-Mode Loading Scan Chain...

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IEEE International Symposium on Defect and Fault Tolerance in VLSI Systems

作者： Gang Zeng Youhua Shi Toshinori Takabatake Masao Yanagisawa Hideo Ito Graduate School of Information Science University of Nagoya Japan Department of Computer Science Waseda University Japan Department of Information Science Shonan Institute of Technology Japan Faculty of Engineering Chiba University Japan

ISBN: (纸本)9780769527062;076952706X

A fixing-shifting encoding (FSE) method is proposed to reduce test cost of IP cores. The FSE method reduces test cost by supporting multiple-mode loading test data, i.e., parallel loading, left-direction, and right-direction serial loading for each test slice data. Furthermore, the FSE that utilizes only two test channels can support a large number of internal scan chains and achieve further reduction in test cost by combining with scan chain clustering method. As a non-intrusive and automatic test pattern generation (ATPG) independent solution, the approach is applicable to IP core testing because it requires neither redesign of the core under test (CUT) nor running any additional ATPG for the encoding procedure. In addition, the decoder has low hardware overhead, and its design is independent of the CUT. Experimental results for some large ISCAS 89 benchmarks and an industry ASIC design have proven the efficiency of the proposed approach

关键词： Costs Automatic test pattern generation Circuit testing Automatic testing Decoding System-on-a-chip Hardware Design for testability Feedback information science

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Analysis of PVT composite structure images using a Search Through algorithm

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WSEAS Transactions on Systems 2006年第11期5卷 2708-2712页

作者： Shilbayeh, Nidal F. Iskandarani, Mahmoud Z. Faculty of Computer Science and Information Technology The University of Graduate Studies P.O.BOX 42 11610 Amman Jordan Faculty of Science and Information Technology Al-Zaytoonah Private University of Jordan P.O.BOX 911597 11191 Amman Jordan

An effective NDT (Non-Destructive Testing) image analysis technique for detecting materials damage and defects existence has been developed successfully and applied to PVT images of composite structures. The developed technique is based on converting an image to its equivalent pixel values and then applying Search Through (ST) algorithm to the converted image such that the presence of damage in the composite structure and its extent can be easily verified. The technique has a novel approach to data analysis by employing intensity, RGB signal re-mix. and wavelength variation of a thermally generated IR-beam onto the specimen under test which can be sensed and displayed on a computer screen as an image. Specimen inspection and data analysis are carried out through pixel level re-ordering and shelving techniques within a transformed image file using a sequence grouping and regrouping software system, which is specifically developed for this work.

关键词： Composite structures

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Studies on Estimation of the Sources Number in Blind Source Separation Problems

Studies on Estimation of the Sources Number in Blind Source ...

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SICE Annual Conference

作者： Takaaki Ishibashi Katsuhiro Inoue Hiromu Gotanda Kousuke Kumamaru Graduate School of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan Faculty of Humanity-Oriented Science and Engineering Kinki University Fukuoka Japan

ICA (Independent Component Analysis) can separate unknown source signals from their mixture signals without information on the transfer functions, provided that the sources are statistically independent. When the number of the source signals is equal to that of the observed signals, the original sources can be recovered except for indeterminacy of scale and permutation. However, the number of the sources is unknown in a real environment. In this paper, we propose an estimation method for the number of the sources based on the joint distribution of the observed signals under two-sensor configuration. From several simulation results, it is found that the number of the sources is coincident to that of peaks in the histogram of the distribution

关键词： Blind source separation Independent component analysis Speech recognition Acoustic noise Frequency Transfer functions Working environment noise computer science Systems engineering and theory Histograms

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Exploiting loop-level parallelism in the AES algorithm

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WSEAS Transactions on computers 2006年第1期5卷 125-132页

作者： Bielecki, Wlodzimierz Burak, Dariusz Faculty of Computer Science and Information Systems Szczecin University of Technology 49 Zolnierska St. PL-71210 Szczecin Poland

In this paper we present the parallelization process of the AES algorithm (Rijndael) based on loop-level parallelism along with the description of exploited parallelization tools. The data dependence analysis of the most time-consuming loops and appropriate loop transformations were applied in order to parallelize the sequential algorithm. The OpenMP standard was chosen for representing the parallelism of the AES algorithm. Speed-up measurements for a parallel program are presented. A strategy of the parallelization process of the standard modes of operation for the AES algorithm is also described.

关键词： Cryptography

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