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作者： Yokoyama, Tsutomu Hoashi, T. Nakamiya, T. Department of General Education Sojo University 4-22-1 Ikeda Kumamoto 860-0082 Japan Department of Electronics Computer and Network Sojo University 4-22-1 Ikeda Kumamoto 860-0082 Japan Department of Electronics and Intelligent Systems Engineering Tokai University 9-1-1 Toroku Kumamoto 862-8652 Japan

ISBN: (纸本)9781934142141

In this paper, a novel design method for two band antenna using monopole antenna with Sperrtopf for mobile communication and Digital communications System is presented. We made a trial two-band antenna, with operating frequencies of 800MHz and 2.04 GHz, and examined the design method by the comparing measured VSWR of the antenna with the simulation results using simulation soft WIPL-D Microwave and Nec-2. The simulation results of the VSWR were in good agreement with the experimental results.

关键词： Monopole antennas

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The quasi-sliding mode control for a class of discrete-time bilinear systems

The quasi-sliding mode control for a class of discrete-time ...

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IEEE International Conference on systems, Man and Cybernetics

作者： Ti-Hung Chen Jui-Yiao Su Chung-Chun Kung Shin-Huang Li Department of Computer Information and Network Engineering Lunghwa University of Science and Technology Taoyuan Taiwan Mechanical and Systems Research Laboratories Industrial Technology and Research Institute Hsinchu Taiwan Department of Electrical Engineering Tatung University Taipei Taiwan

In this paper, we propose the two quasi-sliding mode control for bilinear systems. By proper choice of the parameters in the control law, the system states will move within the quasi-sliding mode control band. Finally... 详细信息

关键词： Radio access networks Helium

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Optical power budget and cost estimation for Intelligent Fiber-To-the-Home (i-FTTH)

Optical power budget and cost estimation for Intelligent Fib...

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International Conference on Photonics (ICP)

作者： Ng Boon Chuan Aswir Premadi Mohammad Syuhaimi Ab-Rahman Kasmiran Jumari Spectrum Technology Research Division Computer & Network Security Research Group Department of Electrical Electronics & Systems Engineering Faculty of Engineering & Built Environment Universiti Kebangsaan Malaysia Bangi Selangor Darul Ehsan Malaysia

This paper calculates the optical power budget and power margin for designing a conventional passive optical network (PON)-based Fiber-To-the-Home (FTTH) and Intelligent Fiber-To-the-Home (i-FTTH) with different link length of drop fiber and optical power splitting ratio of 1×N passive optical splitter. A simple calculation is used to determine how much loss and power are available for each individual fiber link in both networks with different type of signals. The cost estimation for both networks including the additional optical monitoring, switching, and protection systems are calculated and compared.

关键词： Optical fibers Passive optical networks Integrated optics Optical network units Optical transmitters

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Operon Prediction Using Particle Swarm Optimization and Reinforcement Learning

Operon Prediction Using Particle Swarm Optimization and Rein...

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International Conference on Technologies and Applications of Artificial Intelligence (TAAI)

作者： Li-Yeh Chuang Jui-Hung Tsai Cheng-Hong Yang Department of Chemical Engineering & Institute of Biotechnology and Chemical Engineering I-Shou University Kaohsiung Taiwan Department of Computer Science and Information Engineering National University of Kaohsiung Kaohsiung Taiwan Department of Electronic Engineering National Kaohsiung University of Applied Sciences Kaohsiung Taiwan Department of Network Systems Tokyo University Chiayi Taiwan

An operon is a fundamental unit of transcription contains a specific function of genes for the construction and regulation of networks at the whole genome level. The operon prediction is critical for the understanding of gene regulation and functions in newly sequenced genomes. Various methods for operon prediction have been proposed in the literature shows that the experimental methods for operon detection are tend to be non-trivial and time-consuming. In this study, a binary particle swarm optimization (BPSO) and reinforcement learning (RL) are used for operon prediction in bacterial genomes. The intergenic distance, participation in the same metabolic pathway and the gene length ratio property of the Escherichia coli genome are used to design a fitness function based on the conception of RL. Then the three genomes are used to test the prediction performance of BPSO with RL. Experimental results show that the prediction accuracy of this method reached to 92.8%, 94.3% and 95.9% on Bacillus subtilis, Pseudomonas aeruginosa PA01 and Staphylococcus aureus genomes respectively. The proposed method for the predicted operons with the highest accuracy contains the three test genomes.

关键词： Genomics Bioinformatics Accuracy Sensitivity and specificity Learning Microorganisms

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Conductivity of ZnS: Mn nanocrystal layers with various Mn Ion concentrations

Conductivity of ZnS: Mn nanocrystal layers with various Mn I...

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IEEE International Conference on Semiconductor Electronics (ICSE)

作者： Mohd Syuhaimi Ab Rahman Noor Azie Azura Mohd Arif Abang Annuar Ehsan Computer and Network Security Department of Electrical Electronic & Systems Engineering Institute of Micro Engineering & Nanoelectronics Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Bangi Selangor Darul Ehsan Malaysia Photonics Laboratory Institute of Micro Engineering & Nanoelectronics Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Bangi Selangor Darul Ehsan Malaysia

Transition metal-doped ZnS materials have received broad attention due to their well-known performance in electronics and optics. It has been observed previously by other researchers that Mn is one of interesting dopant. This dopant inside of ZnS offers a feasible means of fine tuning band gap. Because of this property, we interested to study the effect on electrical part. Hence, the aim of this work is discussed in term of electrical dark conductivity and photoconductivity of ZnS: Mn. Zn (1-x) Mn x S samples with various x values (0.05 ≤ x ≤ 0.35) are synthesized by using sol gel spin coating method. Surface morphology and I-V characteristics of the samples are investigated by using FE-SEM and dc electrical measurement with and without UV exposure. It is found that the average diameters are between 25 and 27 nm. The increase of Mn site doping concentration leads to an increase of the electrical dark conductivity and photoconductivity of the samples. Moreover, we have found that the current increases greater with the increment of Mn concentration by using UV source.

关键词： Conductivity Zinc compounds Nanocrystals Photoconductivity Conducting materials Inorganic materials Optical materials Particle beam optics Optical tuning Photonic band gap

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Dynamic stability and control design of modern electric energy systems with large penetration of distributed generators

Dynamic stability and control design of modern electric ener...

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iREP Symposium on Bulk Power System Dynamics and Control

作者： M. Honarvar Nazari M. Ilić J. Peças Lopes Electrical Engineering K.N. Toosi University of Technology Iran Energy Systems Engineering Sharif University of Technology Iran Carnegie Mellon University Pittsburgh PA USA Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA USA University of Illinois Urbana-Champaign USA Control of Future Electricity Network Operations in the Faculty of Technology Delft University of Technnology Delft Netherlands Cornell University Ithaca NY USA Department of Electrical Engineering of the Faculty of Engineering of University of Porto Portugal

This paper investigates dynamic stability and control design of modern electric energy systems as many MW-scale distributed generators (DG) of various types are deployed in the distribution side of electric systems. The paper is mainly concerned about small-signal frequency stability of distribution systems with decentralized or centralized control systems. The Gerschgorin Circle Theory and Hicks Stability Theory are used for verifying sufficient conditions for small-signal stability. The paper also discusses about designing advanced enhancing robustness methods to ensure both safety and stability of modern distribution systems. Finally, the paper closes with a discussion of policies needed to support large penetration of DG units in distribution systems to ensure safety and robustness of the system.

关键词： Stability criteria Centralized control Power system stability Distributed control Frequency control Mathematical model

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Improved infrared thermography based image construction for biomedical applications using Markov Chain Monte Carlo method

Improved infrared thermography based image construction for ...

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31st Annual International Conference of the IEEE engineering in Medicine and Biology Society: engineering the Future of Biomedicine, EMBC 2009

作者： Umadevi, V. Suresh, S. Raghavan, S.V. Network Systems Laboratory Department of Computer Science and Engineering IIT Madras Chennai India Department of Mechanical Engineering IIT Madras Chennai India

ISBN: (纸本)9781424432967

Breast Thermography is one of the scanning techniques used for breast cancer detection. Looking at breast thermal image it is difficult to interpret parameters of tumor such as depth, size and location which are useful for diagnosis and treatment of breast cancer. In our previous work (ITBIC) we proposed a framework for estimation of tumor size using clever algorithms and the radiative heat transfer model. In this paper, we expand it to incorporate the more realistic Pennes bio-heat transfer model and Markov Chain Monte Carlo (MCMC) method, and analyze it's performance in terms of computational speed, accuracy, robustness against noisy inputs, ability to make use of prior information and ability to estimate multiple parameters simultaneously. We discuss the influence of various parameters used in its implementation. We apply this method on clinical data and extract reliable results for the first time using breast thermography. ©2009 IEEE.

关键词： Thermography (imaging)

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An adaptive cross-layer mapping algorithm for MPEG-4 video transmission over IEEE 802.11e WLAN

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Telecommunication systems 2009年第3-4期42卷 223-234页

作者： Lin, C.-H. Shieh, C.-K. Ke, C.-H. Chilamkurti, N.K. Zeadally, S. Department of Electrical Engineering National Cheng Kung University Tainan 701 Taiwan Department of Computer Science and Information Engineering National Kinmen Institute of Technology Kinmen Taiwan Department of Computer Science La Trobe University VIC Australia Network Systems Laboratory Department of Computer Science and Information Technology University of the District of Columbia Washington DC United States

This paper proposes an adaptive cross-layer mapping algorithm to improve the transmission quality of MPEG-4 video stream over an IEEE 802.11e wireless network. Instead of classifying video data to a specific access category in an 802.11e network, we propose an algorithm that dynamically maps MPEG-4 video packets to appropriate access categories according to both the significance of the video data and the network traffic load. Our proposed cross-layer architecture passes information about the significance of video packets from the application layer to the media access control layer. The queue length of a specific access category is used to deduce the network traffic load. We conducted a performance evaluation of our proposed cross-layer approach under both light and heavily loaded network conditions. Our simulation results demonstrate: (a) superior performance of our proposed approach (under both light and heavy loads) over 802.11e (Enhanced Distributed Channel Access (EDCA) and static mapping schemes, (b) not only guarantees prioritized transmission of essential video data but also provides efficient queue length utilization. © 2009 Springer Science+Business Media, LLC.

关键词： Motion Picture Experts Group standards

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Restoration scheme implementation in automatic protection unit for FTTH passive optical network

Restoration scheme implementation in automatic protection un...

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2009 International Conference on Electrical engineering and Informatics, ICEEI 2009

作者： Che Aziz, Siti Asma Ab-Rahman, Mohamad Syuhaimi Hassan, Siti Rahayu Jumari, Kasmiran Computer and Network Security Research Group Department of Electrical Electronics and Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia

ISBN: (纸本)9781424449132

this paper focused on the implementation of automatic device switching to perform in restoration scheme located at distribution fiber section. This protection device is potentially will improve the system efficiency in order to provide the continuous data flow until it reach to the end user. We proposed for immediate split structure in EPON network when the signal is totally split when it pass through the optical splitter. The restoration scheme proposed in this paper was presented and the simulation results proved the system feasibility. The bit error rate (BER) performances are measured by a 1.25 Gp/s non- return-to zero (NRZ) pseudo random binary sequence (PBRS) with a pattern length of 231-1 for the downstream traffic between OLT and 8 ONUs. Our results were obtained by observing bit error rates, eye diagram, and optical power levels. © 2009 IEEE.

关键词： Restoration

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Vanets: Case study of a peer-to-peer video conferencing system

Vanets: Case study of a peer-to-peer video conferencing syst...

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2009 6th IEEE Consumer Communications and networking Conference, CCNC 2009

作者： Hossain, Tareq Cui, Yi Xue, Yuan Vanderbilt Advanced NETwork Systems Laboratory Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN 37212

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