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IEEJ Transactions on Electronics, Information and systems 2009年第11期129卷 7+2004-2013页

作者： Sato, Akihiro Satake, Shinsuke Inai, Hiroshi Faculty of Computer Science and System Engineering Okayama Prefectural University 111 Kuboki Soja Okayama 719-1197 Japan

In web service, the server is normally responsible for the connection termination. That would produce useless connections. In this paper, to improve quality of web service, we propose two methods in which a client terminates the connection, and evaluate their performance via simulation. One method is to terminate a persistent connection under HTTP/1.1 by the client. As the simulation result, we confirmed the effectiveness of this method by comparing with the existing one. The other method is that, by using a TCP reset packet, a client terminates the suspended connection which is revealed when the client quits the browse. As the simulation result, we confirmed that this method reduces a connection loss probability when the listenbacklog parameter value is large. © 2009 The Institute of Electrical Engineers of Japan.

关键词： Web services

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An access method by using fixed backoff for wireless LANs

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, Information and systems 2008年第11期128卷 1610-1618+3页

作者： Nakamura, Kazutoyo Satake, Shinsuke Inai, Hiroshi Faculty of Computer Science and System Engineering Okayama Prefectural University 111 Kuboki Soja Okayama 719-1197 Japan

In a wireless LAN, since two or more terminals in a service area do the random access in a signal channel, it is necessary to achieve an efficient access that reduces the frame collision. Under the standard IEEE 802.11 protocol, each terminal sets a random backoff. Collision avoidance are being achieved while it generates useless standby time and acheives low throughput. To solve that problem, this paper proposes a channel access method which fixed backoff after success transmission. Via simulation, the proposed method reduces frame collisions and improves throughput. Furthermore, our method provides less frame loss probability and smaller file transfer delay. © 2008 The Institute of Electrical Engineers of Japan.

关键词： IEEE Standards

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Deployment of Polar Codes for Mission-Critical Machine-Type Communication Over Wireless Networks

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computers, Materials & Continua 2022年第4期71卷 573-592页

作者： Najib Ahmed Mohammed Ali Mohammed Mansoor Rodina Binti Ahmad Saaidal Razalli Bin Azzuhri Department of Software Engineering Faculty of Computer Science and Information TechnologyUniversity of Malaya50603Kuala Lumpur Malaysia 2Department of Computer System&TechnologyFaculty of Computer Science and Information TechnologyUniversity of Malaya50603Kuala LumpurMalaysia

Mission critical Machine-type Communication(mcMTC),also referred to as Ultra-reliable Low Latency Communication(URLLC),has become a research *** is primarily characterized by communication that provides ultra-high reliability and very low latency to concurrently transmit short commands to a massive number of connected *** the reduction in physical(PHY)layer overhead and improvement in channel coding techniques are pivotal in reducing latency and improving reliability,the current wireless standards dedicated to support mcMTC rely heavily on adopting the bottom layers of general-purpose wireless standards and customizing only the upper *** mcMTC has a significant technical impact on the design of all layers of the communication protocol *** this paper,an innovative bottom-up approach has been proposed for mcMTC applications through PHY layer targeted at improving the transmission reliability by implementing ultra-reliable channel coding scheme in the PHY layer of IEEE 802.11a standard bearing in mind short packet transmission *** achieve this aim,we analyzed and compared the channel coding performance of convolutional codes(CCs),low-density parity-check(LDPC)codes,and polar codes in wireless network on the condition of short data packet *** Viterbi decoding algorithm(VA),logarithmic belief propagation(Log-BP)algorithm,and cyclic redundancy check(CRC)successive cancellation list(SCL)(CRC-SCL)decoding algorithm were adopted to CC,LDPC codes,and polar codes,***,a new PHY layer for mcMTC has been *** reliability of the proposed approach has been validated by simulation in terms of Bit error rate(BER)and packet error rate(PER)***-to-noise ratio(SNR).The simulation results demonstrate that the reliability of IEEE 802.11a standard has been significantly improved to be at PER=10−5 or even better with the implementation of polar *** results also show that the general-purpose wireless net

关键词： Machine-type communication mission-critical applications MTC URLLC M2M wireless networks polar codes

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A systematic Review of Multi-Sensor Information Fusion for Equipment Fault Diagnosis

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IEEE Transactions on Instrumentation and Measurement 2025年

作者： Lin, Tantao Ren, Zhijun Zhu, Linbo Zhu, Yongsheng Feng, Ke Ding, Weiping Yan, Ke Beer, Michael Xi'an Jiaotong University Key Laboratory of Education Ministry for Modern Design & Rotor-Bearing System Xi'an710049 China Xi'an Jiaotong University Frontier Institute of Science and Technology Xi'an710049 China Xi'an Jiaotong University School of School of Chemical Engineering and Technology Xi'an710049 China Xi'an Jiaotong University School of Mechanical Engineering Xi'an710049 China Nantong University School of Artificial Intelligence and Computer Science Nantong226019 China City University of Macau Faculty of Data Science Macau999078 China Leibniz University Institute for Risk and Reliability Hannover30167 Germany University of Liverpool Department of Civil and Environmental Engineering LiverpoolL69 3BX United Kingdom Tongji University International Joint Research Center for Resilient Infrastructure International Joint Research Center for Engineering Reliability and Stochastic Mechanics Shanghai200092 China

In contrast to fault diagnosis relying solely on a single sensor, the method of multi-sensor information fusion for fault diagnosis (MSIFFD) broadens the spectrum of available information sources. It is renowned for its high accuracy and reliability, traits that have attracted growing attention within the research community and led to the generation of a substantial body of publications. However, there is currently a lack of a comprehensive and systematic review in this domain. Thereby, this review aims to thoroughly explore all research achievements in the field of MSIFFD. At the outset, an analysis is undertaken to delineate the fusion level of multi-sensor information, with a specific focus on its location and types of inputs and outputs within the information flow. Subsequently, an examination of the six primary fundamental operations for amalgamating multi-sensor information is undertaken to clarify the motivations and processes involved in information fusion across various operations. Following this, factors influencing fusion diagnostics and strategies aimed at improving their performance are examined to explore approaches for enhancing fusion accuracy. The subsequent sections delve into the analysis of sensor types and application scenarios, providing a reference guide for practical applications. Finally, this review outlines potential future challenges in the field of MSIFFD and provides a range of recommendations and possible solutions for consideration. © 1963-2012 IEEE.

关键词： Information fusion

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Adaptive Parallel Model Combination for Reduced Environmental Mismatch in Noisy Speech Recognition

Adaptive Parallel Model Combination for Reduced Environmenta...

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International Conference on Electronic Design

作者： Tan, S. S. Ahmad, Abdul Manan Software Engineering Department Faculty of Computer Science and Information System University of Technology Malaysia Malaysia Speech Laboratory Faculty of Computer Science and Information System University of Technology Malaysia Malaysia

ISBN: (纸本)9781424423149

Due to environmental mismatch, speech recognition systems often exhibit drastic performance degradation in noisy conditions. This paper presents a model-based technique termed Adaptive Parallel Model Combination (APMC) which compensates the initial acoustic models to reduce the discrepancy. APMC used the well-known PMC technique to composite a set of corrupted speech models, while fine tuning the mean parameter of the models using a transformation-based adaptation technique called Maximum Likelihood Spectral Transformation (MLST). Evaluated on a context-independent phone recognition task, APMC was found to be superior to both PMC and MLST, especially in non-stationary noisy conditions. On average, APMC has achieved 48.81% improvement over the initial models, whereas PMC and MLST have improved the accuracy by 34.12% and 35.23% respectively.

关键词： Maximum likelihood

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Some optical and quasi-optimal binary codes from cyclic codes over GF (2(m))

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND computer scienceS 1996年第10期E79A卷 1737-1738页

作者： Sakakibara, K Kasahara, M Yuba, Y Faculty of Computer Science and System Engineering Okayama Prefectural University Soja-shi 719-11 Japan Faculty of Engineering and Design Kyoto Institute of Technology Kyoto-shi 606 Japan

It is shown that five optimal and one quasi-optimal binary codes with respect to the Griesmer bound can be obtained from cyclic codes over GF(2(m)). An [m(2(em)-1), em, 2(em-1)m] code, a [3(2(2e)-1), 2e, 3 . 2(2e-1)] code, a [2(2(2e)-1), 2, (2(2e+2)-4)/3] code, a [3(2(2e)-1), 2, 2(2e+1)-2] code, and a [3(2(2e)-1), 2(e+1), 3 . 2(2e-1)-2] code are optimal and a [2(2(2e)-1)2(e+1), 2(2e)-2] code is quasi-optimal.

关键词： optimal binary codes binary image of cyclic codes Griesmer bound concatenated structure

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Decision making model for Electronic Tender Evaluation (eTE) using fuzzy AHP with extent analysis method

International Journal of Digital Content Technology and its ...

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International Journal of Digital Content Technology and its Applications 2012年第22期6卷 79-89页

作者： Alias, Ros Haslinda Noor, Noor Maizura Mohamad Selamat, Ali Saman, Md. Yazid Mohd Abdullah, Mohd Lazim Computer Science Department Universiti Malaysia Terengganu Malaysia Software Engineering Department Faculty of Computer Science and Information System Universiti Teknologi Malaysia Malaysia Department of Mathematics Faculty of Science and Technology Universiti Malaysia Terengganu Malaysia

Transformation in procurement technique aims to create a sustainability development and innovative outsourcing strategy. It can increase the probability of project success with quality and give an added value in money and contract times. Wide range of issues should be considered in producing a sincere and trusted decision within respective agencies. Our research proposed a procurement transformation model for selecting the optimal result of contractor selection under multi criteria environments. The corresponding data are centralizing, easy to manage and can be updated accordingly. Fuzzy comparing judgment is used as the method to overcome the ambiguity aspects in selecting significant preferences by decision maker regarding to the subjective opinion. Decision making process is represented by the integration of evaluation model to produce a final result. Finally, the model was tested in tender evaluation processes to determine the most beneficial contractor to perform the construction project.

关键词： Contractors

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Hybrid splitting criteria based on purity measures

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WSEAS Transactions on computers 2007年第5期6卷 843-850页

作者： Povalej, Petra Kokol, P. Laboratory for System Design Faculty for Electrical Engineering and Computer Science University of Maribor Smetanova ulica 17 2000 Maribor Slovenia

Decision trees are one of the most transparent methods probably most often used for solving classification, tasks. In the process of decision tree induction a lot of input parameters have to be fine-tuned in order to obtain good results. However the most important and probably most influential parameter in top-down induction method is a splitting criterion, which can vary from one classification task to another. In this paper we empirically tested four of them, based on well known purity measures, on 54 UCI databases. Although none of the proposed splitting criterion in the literature has proved to be universally better than the rest, they are not always suitable for solving any classification task. Therefore we propose two new splitting criteria: hybrid linear combination of purity measures and voting of purity measures, which obtain at least comparable results to other well-known criteria used in greedy decision tree induction method, while their structure makes them ideal for non-expert users. Boosting was also applied as one of the most successful ensemble methods, which once again proved the ability to significantly improve the classification accuracy on many databases.

关键词： Classification (of information)

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Development of a machine learning model for predicting abnormalities of commercial airplanes

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Data science and Management 2024年第3期7卷 256-265页

作者： Rossi Passarella Siti Nurmaini Muhammad Naufal Rachmatullah Harumi Veny Fara Nissya Nur Hafidzoh Department of Computer Engineering Faculty of Computer ScienceUniversitas Sriwijaya30662Indonesia Intelligent System Research Group(ISysRG) Faculty of Computer ScienceUniversitas Sriwijaya30662Indonesia Department of Informatics Faculty of Computer ScienceUniversitas Sriwijaya30662Indonesia College of Engineering Studies Universiti Teknologi MARA(UiTM)Shah Alam40450Malaysia

Airplanes are a social necessity for movement of humans,goods,and *** are generally safe modes of transportation;however,incidents and accidents occasionally *** prevent aviation accidents,it is necessary to develop a machine-learning model to detect and predict commercial flights using automatic dependent surveillance–broadcast *** study combined data-quality detection,anomaly detection,and abnormality-classification-model *** research methodology involved the following stages:problem statement,data selection and labeling,prediction-model development,deployment,and *** data labeling process was based on the rules framed by the international civil aviation organization for commercial,jet-engine flights and validated by expert commercial *** results showed that the best prediction model,the quadratic-discriminant-analysis,was 93%accurate,indicating a“good fit”.Moreover,the model’s area-under-the-curve results for abnormal and normal detection were 0.97 and 0.96,respectively,thus confirming its“good fit”.

关键词： Automatic dependent surveillance-broadcast data Commercial airplanes accident Data-labeling Machine learning Prediction model

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Towards ontology driven semantic conflicts detection in web services at message level

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International Journal of Web Portals 2013年第3期5卷 71-80页

作者： Al-Baltah, Ibrahim Ahmed Ghani, Abdul Azim Abdul Department of Software Engineering and Information System Faculty of Computer Science and Information Technology Universiti Putra Malaysia Serdang Selangor Malaysia

One of the biggest problems for establishing semantic interoperability is semantic conflicts, which prevent seamless message exchange between heterogeneous Web services. Consequently, numerous work has been done to establish semantic interoperability by solving semantic conflicts. However, the current work has not reached its maturity level to solve this problem effectively. Therefore, this paper proposes a new ontology driven approach to detect semantic conflicts between heterogeneous Web services at message level. This new approach will advance the process of establishing semantic interoperability in order to allow heterogeneous Web services to exchange their messages seamlessly. The main purpose of our approach is to detect the potential conflicts that occur during message exchange process. Copyright © 2013, IGI Global.

关键词： Web services

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