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2013 5th IEEE Electric Ship Technologies Symposium, ESTS 2013

作者： Prempraneerach, P. Angle, M.G. Kirtley Jr., J.L. Karniadakis, G.E. Chryssostomidis, C. Mechanical Engineering Department Rajamangala University of Technology Thunyaburi Pathumthani 12110 Thailand Electrical Engineering and Computer Science Department Research Laboratory for Electronics MIT Cambridge MA 02139 United States Division of Applied Mathematics Brown University Providence RI 02912 United States MIT Sea Grant College Program Department of Mechanical Engineering MIT Cambridge MA 02138 United States

ISBN: (纸本)9781467352437

DC faults may cause severe disruptions in continuity of service to vital loads in a shipboard integrated power system, hence detection, isolation, and protection against such faults must be incorporated in both medium-voltage DC (MVDC) and low-voltage DC (LVDC) systems. Here we consider the effectiveness of existing z-source breakers and propose several new designs more appropriate for fault detection in MVDC and LVDC systems. In particular, we perform an optimization study that aims to minimize dissipation and weight and we identify the key parameters for use in MVDC and LVDC systems. Preliminary verification and validation studies are also included. © 2013 IEEE.

关键词： Electric circuit breakers

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A flexible implementation of the PSO algorithm for fine- and coarse-grained reconfigurable embedded systems

A flexible implementation of the PSO algorithm for fine- and...

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International Conference on Reconfigurable Computing and FPGAs (ReConFig)

作者： Michael Rueckauer Daniel M. Munoz Timo Stripf Oliver Oey Carlos H. Llanos Juergen Becker Institute for Information Processing Technology Karlsruhe Institute of Technology Karlsruhe Germany Electronics Engineering Graduate Program University of Brasilia Brasilia DF Brazil Department of Mechanical Engineering University of Brasilia Brasilia DF Brazil

The large execution times demanded for solving complex optimization problems in embedded systems is one of the main challenges in the field of engineering optimization. One solution is the acceleration by a specialized hardware implementation. However, this is coming along with a loss of flexibility especially for the realization of the application-specific fitness function. In this paper we present novel solutions for the flexible implementation of the Particle Swarm Optimization (PSO) algorithm by targeting the coarse-gained reconfigurable Kahrisma architecture. Effectiveness of the proposed solutions was demonstrated for benchmark test problems by numerical simulations achieved by Kahrisma and the MicroBlaze soft-core processor mapped on fine-grained reconfigurable technology using the Open Virtual Platform (OVP) simulator as well as an FPGA implementation. Convergence results demonstrate that the proposed solutions achieve the optimal points for different scenarios. Finally, execution time results demonstrate that the Kahrisma implementation with 4-issue width provides the required flexibility to design high performance embedded optimization systems.

关键词： Computer architecture Optimization Particle swarm optimization Tiles Clocks Field programmable gate arrays Benchmark testing

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Binary Exponential Increment Half Decrement backoff algorithm for IEEE802.11 wireless LANs

Binary Exponential Increment Half Decrement backoff algorith...

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International Conference on Electrical engineering/electronics, Computer, Telecommunications and Information technology, ECTI-CON

作者： Jesada Sartthong Suvepon Sittichivapak Adisorn Kaewpukdee Ittibhoom Boonpikum Department of Telecommunications Engineering Faculty of Engineering King Mongkut's Institute of Technology Bangkok Thailand Telecommunications Engineering Program Faculty of Science and Technology Nakhon Pathom Rajabhat University Nakhon Pathom Thailand Department of Electronics Engineering Faculty of Engineering King Mongkut's Institute of Technology Bangkok Thailand

Backoff algorithm is a technique to reduce packet collisions and to improve throughput efficiency in wireless local area network (WLAN). In this research, we propose a new backoff algorithm which is named Binary Exponential Increment Half Decrement (BEIHD) backoff algorithm. Furthermore, we introduce a new discrete Markov chain model for modeling the performance analysis of wireless local area network. A new model is called the Fixed Backoff stages and Fixed Contention windows (FBFC) technique. In FBFC scheme, the accuracy of the transmission probability parameter is derived from step by step procedure using the global balance equation concept in steady state condition. The saturated throughput efficiency of all backoff algorithms is compared under the same Physical layer (PHY) parameters and Medium Access Control (MAC) scheme in IEEE802.11a/b/g standards. Our numerical results show that the throughput performance of BEIHD backoff algorithm is better than the Binary Exponential Backoff (BEB) algorithm. Moreover, the distinction of BEIHD backoff algorithm is near the realistic system, and it can be implemented without to modify hardware in physical layer.

关键词： Mathematical model Throughput Equations Algorithm design and analysis Multiaccess communication Wireless LAN Markov processes

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Band classification based on chromosome shapes

Band classification based on chromosome shapes

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Biomedical engineering International Conference (BMEiCON)

作者： Ravi Uttamatanin Peerapol Yuvapoositanon Apichart Intarapanich Saowaluck Kaewkamnerd Sissades Tongsima The Electrical Engineering Graduate Program Mahanakorn University of Technology Bangkok Thailand National Electronics and Computer Technology Center Pathum thani Thailand Electronic Engineering Department Mahanakorn University of Technology Bangkok Thailand National Center for Genetic Engineering and Biotechnology Pathum thani Thailand

For an automatic chromosome classification, band resolution information is required in order to perform diagnosis on numerical and structural abnormalities. Metaphases with low band resolution are normal used for numerical abnormality analysis while metaphases with high band resolution are used for structural abnormality analysis. In our work, we classify metaphases into low and high band resolution groups using chromosome shape. This band classification task can automatically perform without human intervention leading to faster the diagnosis process. The results showed that chromosome shape information is able to classify metaphases into low and high band resolution groups with the accuracy of 73.08% and 95.24%, respectively.

关键词： Biological cells Image resolution Probability density function Shape Accuracy Image segmentation Microscopy

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Frictional characteristics measurement of a ceramic aerostatic linear bearing 5

Frictional characteristics measurement of a ceramic aerostat...

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5th International Conference on Advanced Micro-Device engineering, AMDE 2013

作者： Kitabata, Kouki Iwashita, Hiroshi Takita, Akihiro Djamal, Mitra Pornsuwancharoen, Nithiroth Fujii, Yusaku Education Program of Electronics and Informatics Mathematics and Physics Graduate School of Science and Technology Gunma University 1-5-1 Tenjin-cho Kiryu Gunma376-8515 Japan Depatment of Electronics Graduate School of Engineering Gunma University 1-5-1 Tenjin-cho Kiryu Gunma376-8515 Japan Division of Mechanical Sience and Technology Graduate School of Tecnology Gunma University 1-5-1 Tenjin-cho Kiryu Gunma376-8515 Japan Theoretical High Energy Physics and Instrumentation Research Group Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Jl. Ganesa 10 Bandung40132 Indonesia Department of Electrical Engineering Faculty of Industry and Technology Rajamangala University of Technology Isan Sakonnakon47160 Thailand

ISBN: (纸本)9783038354659

The resultant force acting on the moving part of the ceramic aerostatic linear bearing is measured highly accurately as the inertial force of the moving part of the bearing by means of the levitation mass method (LMM). The measurement results of the ceramic aerostatic linear bearing and metal aerostatic linear bearing of different mass are compared. The regression equation of the ceramic aerostatic linear bearing and metal aerostatic linear bearing are calculated. The ceramic linear bearing and metal linear bearing have extremely small frictional force.. © (2015) Trans Tech Publications, Switzerland.

关键词： Aerodynamics

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Flexible electronics: Extremely Flexible Transparent Conducting Electrodes for Organic Devices (Adv. Energy Mater. 1/2014)

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Advanced Energy Materials 2014年第1期4卷

作者： Sunghoon Jung Sunghun Lee Myungkwan Song Do‐Geun Kim Dae Sung You Jong‐Kuk Kim Chang Su Kim Tae‐Min Kim Kwon‐Hyeon Kim Jang‐Joo Kim Jae‐Wook Kang Surface Technology Division Korea Institute of Materials Science (KIMS) Changwon 641‐831 Republic of Korea OLEDs Center WCU Hybrid Materials Program Department of Materials Science and Engineering Seoul National University Seoul 151‐744 Republic of Korea Professional Graduate School of Flexible and Printable Electronics Department of Flexible and Printable Electronics Chonbuk National University Jeonju 561‐756 Republic of Korea

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A problem-solving and project based introduction to engineering technology course

A problem-solving and project based introduction to engineer...

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119th ASEE Annual Conference and Exposition

作者： Ray, Biswajit Electronics Engineering Technology Program Bloomsburg University of Pennsylvania United States

ISBN: (纸本)9780878232413

The motivation and implementation of an Introduction to engineering technology course, offered to freshmen electronics engineering technology students, are presented. The primary objective of this course is to improve the quantitative and qualitative problem solving skill of freshmen students during their first semester of college experience. This in turn contributes to their preparedness for subsequent science, math, and engineering technology courses, positively impacting student retention rate. The course presented herein also includes a number of handson projects to introduce the concepts of engineering design, prototyping, and testing. Soft skills such as formal report writing and team work, and orientation to engineering profession and industry are also key components of this course. Course-embedded assessment data supporting the objectives and student outcomes are also presented. Assessment data clearly indicate that even though the students consider this introductory course to be demanding and challenging, they do benefit from its analytical rigor essential to performing well in subsequent math, science, and engineering technology courses. © 2012 American Society for engineering Education.

关键词： Students

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Developing undergraduate FPGA curriculum using Altium software and hardware

Developing undergraduate FPGA curriculum using Altium softwa...

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119th ASEE Annual Conference and Exposition

作者： Mayer, Erik A. Pittsburg State University Electronics Engineering Technology Program United States

ISBN: (纸本)9780878232413

In this paper, the development and assessment of a curriculum covering field programmable gate arrays (FPGAs) will be discussed. An FPGA is a programmable logic device which consists of programmable logic blocks with programmable interconnections. An FPGA may consist of millions of equivalent logic gates. The motivation for the development of the FPGA curriculum was the need for students to be proficient in FPGAs. This need was assessed by two events. At a meeting of the EET industrial advisory committee, the need for employees proficient in FPGAs was expressed. In addition, the software company Altium Limited expressed an interest in working with the EET program to develop FPGA curriculum material for a university program. In the fall semester of 2011, the FPGA curriculum was used in an advanced digital logic course. Previously, programmable array logic (PAL) devices and generic array logic (GAL) devices were used. This course serves as a required course in the newly created embedded systems emphasis area in the four-year undergraduate electronics engineering technology (EET) program at Pittsburg State University in Pittsburg, Kansas. It is planned to include the FPGA material in future offerings of the course. © 2012 American Society for engineering Education.

关键词： Curricula

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Optimization of a z-source DC circuit breaker

Optimization of a z-source DC circuit breaker

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IEEE Electric Ship Technologies Symposium, ESTS

作者： P. Prempraneerach M. G. Angle J. L. Kirtley G. E. Karniadakis C. Chryssostomidis Mechanical Engineering Department Rajamangala University of Technology Thunyaburi Pathumthani Thailand Electrical Engineering and Computer Science Department Research Laboratory for Electronics MIT Cambridge MA USA Division of Applied Mathematics Brown University Providence RI USA Department of Mechanical Engineering MIT MIT Sea Grant College Program Cambridge MA USA

关键词： Circuit faults Thyristors Switches Circuit breakers Capacitors Fault currents Optimization

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Chromosome Classification for Metaphase Selection

Chromosome Classification for Metaphase Selection

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International Symposium on Communications and Information Technologies

作者： Ravi Uttamatanin Peerapol Yuvapoositanon Apichart Intarapanich Saowaluck Kaewkamnerd Sissades Tongsima The Electrical Engineering Graduate Program Faculty of Engineering Mahanakorn University of Technology Bangkok Thailand Electronic Engineering Department Mahanakorn University of Technology Bangkok Thailand National Electronics and Computer Technology Center Pathumtani Thailand National Center for Genetic Engineering and Biotechnology Pathumtani Thailand

ISBN: (纸本)9781467355797

Identification of good metaphase spread is an important step in chromosome analysis for genetic disorder detection. In this paper, we propose a rule for chromosome classification to identify good metaphase spreads. The chromosome shapes were classified into four main classes. The first and the second classes refer to individual chromosomes with straight and bended shapes, respectively. The third class is characterized as those chromosomes with overlapping bodies and the forth class is for the non-chromosomal artifacts. Good metaphase spreads should largely contain the first and the second classes while the number of the third class should be kept minimal. Several image parameters were examined and used for creating rule-based classification. The threshold value for each parameter is determined using statistical model. We observed that the empirical probability density function of the parameters can be represented by Gaussian model and, hence, the threshold value can be easily determined. The proposed rules can efficiently and accurately classify the individual chromosome with > 90% accuracy.

关键词： Chromosome Metaphase selection Metaphase spread Rule base classification Gaussian model

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