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IEEE International Symposium on Parallel and Distributed Processing With Applications

作者： De Freitas, Edison Pignaton Heimfarth, Tales Pereira, Carlos Eduardo Ferreira, Armando Morado Wagner, Flávio Rech Larsson, Tony School of Information Science Computer and Electrical Engineering Halmstad University Halmstad Sweden Institute of Informatics Federal University of Rio Grande do Sul Porto Alegre Brazil Computer Science Department Federal University of Lavras Lavras Brazil Defense Engineering Graduate Program Military Institute of Engineering Rio de Janeiro Brazil

ISBN: (纸本)9780769541907

This paper presents a comparison among different strategies to coordinate the use of heterogeneous wireless sensors aimed for area surveillance. The heterogeneity among the sensor nodes is related to their sensing and mobility capabilities. The goal of the strategies is to provide coordination among the different nodes, in order to make the wireless sensor network perform its missions with higher efficiency. Strategies combine advantages of bio-inspired and utility-based approaches to coordination. Simulations of scenarios with different characteristics were performed and the results are compared and analyzed. © 2010 IEEE.

关键词： Sensor nodes

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Dilatometric study of ferroelectric Rb2CdI4 monoclinic crystal grown by czochralski method

Dilatometric study of ferroelectric Rb2CdI4 monoclinic cryst...

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12th International Meeting on Ferroelectricity, IMF-12 and the 18th IEEE International Symposium on Applications of Ferroelectrics, ISAF-18

作者： Yamaguchi, T. Gotou, S. Miyoshi, T. Kasano, H. Mitsui, T. Kurihama, T. Shimizu, F. Takashige, M. Department of Electrical Engineering School of Science and Engineering Meisei University Hino-shi Tokyo 191-8506 Japan Electrical Engineering Graduate School of Science and Engineering Meisei University Hino-shi Tokyo 191-8506 Japan Department of Physics Graduate School of Science and Engineering Yamaguchi University Yamaguchi-shi Yamaguchi 753-8512 Japan Laboratory of Developmental Program Faculty of Pharmaceutical Sciences Teikyo University Sagamihara-shi Kanagawa 229-0195 Japan Department of Electronics and Information Engineering College of Engineering Chubu University Kasugai-shi Aichi 487-8501 Japan Department of Electronics and Computer Science College of Science and Engineering Iwaki Meisei University Iwaki-shi Fukushima 970-8551 Japan

Crystal growth of Rb2CdI4 was performed by Czochralski method. Transparent colourless crystals with monoclinic structure were obtained. Temperature dependence of the dielectric constant along the b-axis was measured with variation of frequency. The thermal expansions x i (i = a, b, c and a′;a′ = a + c) along the four independent axes were measured both by clip-type strain-gauge dilatometer and X-ray diffraction methods. These results show distinct anomalies associated with the ferroelectric transition at TC= 210 K. Copyright © 2010 Taylor & Francis Group, LLC.

关键词： X ray diffraction

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Writer identification using fractal dimension of wavelet subbands in gabor domain

Writer identification using fractal dimension of wavelet sub...

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作者： He, Zhenyu You, Xinge Zhou, Long Cheung, Yiuming Du, Jianwei Harbin Institute of Technology Shenzhen Graduate School Harbin China Department of Electrical and Information Engineering Wuhan Polytechnic University Wuhan China Department of Electronics and Information Engineering Huazhong University of Science and Technology Wuhan China Department of Computer Science Hong Kong Baptist University Hong Kong Hong Kong Department of Mathematics and Physics Beijing Institute of Petrochemical Technology Beijing China

Writer identification is an important and active branch of biometrics, which means the methods for uniquely recognizing humans based upon their intrinsic physical or behavioral traits. In this paper, we propose one new method for off-line, text-independent writer identification by using the fractal dimension of wavelet subbands in Gabor domain of the handwriting images. In this method, the handwriting images are firstly decomposed into a series of Gabor subbands at different orientations and frequencies. Every Gabor subband is extended into one data sequence. Then, every sequence is decomposed into a series of wavelet subpatterns by wavelet transform. Afterwards, the mesh fractal dimensions of every wavelet subpattern are extracted as the feature for writer identification. Compared to the traditional Gabor method for off-line, text-independent writer identification, our method can extract more effective features to distinguish the handwritings, and hence achieve much better identification results. © 2010 IOS Press and the author(s).

关键词： Fractal dimension

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Ferromagnetic carbon-doped ZnO nanoneedles

Ferromagnetic carbon-doped ZnO nanoneedles

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IEEE International Nanoelectronics Conference (INEC)

作者： S. P. Lau T. S. Herng C. Q. Wei M. Tanemura Department of Applied Physics Hong Kong Polytechnic University Hong Kong China School of Electrical and Electronic Engineering Nanyang Technological University Singapore Singapore Graduate School of Engineering Nagoya Institute of Technology Nagoya Japan

Carbon doped ZnO (ZnO:C) nanoneedles exhibiting Curie temperature above room temperature were fabricated using ion beam technique. The structural and magnetic properties of the ZnO:C nanoneedles were studied. The magnetic moment of the ZnO:C nanoneedles was found to be around 0.7 ¿ B per carbon atom. The ZnO:C nanoneedles could be a promising intrinsic diluted magnetic semiconductor.

关键词： Zinc oxide Ion beams Temperature Magnetic properties Magnetic films Semiconductor films Substrates Semiconductor materials Fabrication X-ray diffraction

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Special session: Model-eliciting activities: A construct for better understanding student knowledge and skills

Special session: Model-eliciting activities: A construct for...

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2010 ASEE Annual Conference and Exposition

作者： Moore, Tamara Self, Brian Miller, Ronald Hjalmarson, Margret Zawojewski, Judith Olds, Barbara Diefes-Dux, Heidi Lesh, Richard Department of Mathematics/Engineering Education STEM Education Center University of Minnesota United States Mechanical Engineering Department California Polytechnic State University San Luis Obispo United States Department of Chemical Engineering Center for Engineering Education Colorado School of Mines United States Graduate School of Education George Mason University United States Department of Mathematics and Science Education Illinois Institute of Technology Chicago IL United States Department of Liberal Arts and International Studies Colorado School of Mines United States School of Engineering Education First-Year Engineering Program Purdue University United States Department of Learning Science Center for Research on Learning and Technology Indiana University United States

The ABET criteria for engineering programs include that students should have "an ability to apply mathematics, science and engineering", "an ability to design a system, component, or process to meet desired needs", "an ability to identify, formulate and solve engineering problems", and "an ability to communicate effectively", and "a knowledge of contemporary issues"1. One manner of integrating teamwork and engineering contexts in undergraduate engineering is through the educational construct of Model-Eliciting Activities (MEAs). MEAs are a class of interdisciplinary problems designed to simulate authentic, client-driven situations in classroom settings. MEAs allow teachers and researchers to observe student development of conceptual models by requiring students to make their models explicit through design-test-revise cycles. The solution of an MEA requires the use of one or more mathematical or engineering concepts that are unspecified by the problem - students must make new sense of their existing knowledge and understandings to formulate a generalizable mathematical model that can be used by the client to solve the given and similar problems. An MEA creates an environment in which skills beyond mathematical abilities are valued because the focus is not on the use of prescribed equations and algorithms but on the use of a broader spectrum of skills required for effective engineering problem solving. Carefully constructed MEAs can begin to prepare students to communicate and work effectively in teams;to adopt and adapt conceptual tools;to construct, describe, and explain complex systems;and to cope with complex systems. MEAs provide a learning environment that is tailored to a more diverse population than typical engineering course experiences as they allow students with different backgrounds and values to emerge as talented, and that adapting these types of activities to engineering courses has the potential to go beyond "filling the gaps" to "opening doors" to wom

关键词： Students

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A multi-source micro power generator employing thermal and vibration energy harvesting

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Procedia engineering 2010年 5卷 1176-1179页

作者： Hakan Töreyin Emre Topal Haluk Külah Middle East Technical University Department of Electrical and Electronics Engineering Ankara Turkey Middle East Technical University Micro and Nano Technologies Graduate Program Ankara Turkey METU-MEMS Research and Application Center Ankara TURKEY * Currently with School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta U.S.A.

This paper introduces a new cantilever type multi-source energy harvester generating electric power from both ambient heat and vibration. Harvesting energy from vibration was realized by electromagnetic conversion, whereas the energy generation from heat was supplied by making use of Seebeck effect of Cr–Al thermocouples implemented on the microcantilevers. The measured average Seebeck coefficient is 12 μV/K per thermocouple. A total voltage of 3.3 mV was generated from the thermoelectric part and 13.4 mV from the electromagnetic part of the device. Measured total power from the fabricated chip is 1.91 nW (1.12 nW from vibration, 0.79 nW from thermoelectric).

关键词： Energy harvesting Thermoelectric, electromagnetic Vibration Micro power generation

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Magnetotransport properties of carbon-doped ZnO thin films and nanoneedles

Magnetotransport properties of carbon-doped ZnO thin films a...

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第六届国际氧化锌及相关材料研讨会

作者： S.P.Lau T.S.Herng M.Tanemura Department of Applied Physics The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho Showa-ku Nagoya 466-8555 Japan

Carbon-doped ZnO (ZnO:C) thin films and nanoneedles exhibiting Curie temperature above 350 °C were fabricated using ion beam technique [1.2]. The magnetic moment of the ZnO:C thin films was found to be around 1.35 μB per carbon atom. Both the ZnO:C thin films and nanoneedles showed anomalous Hall effect and p-type conduction

关键词： ZnO Magnetotransport properties of carbon-doped ZnO thin films and nanoneedles

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Clonal Selection Algorithm with Oppositional Approach Applied to Trajectory Planning of a Robotic Manipulator

Clonal Selection Algorithm with Oppositional Approach Applie...

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Brazilian Symposium on Neural Networks

作者： Daniel C. Jeronymo Yuri C. C. Borges Leandro dos S. Coelho Department of Electrical Engineering Federal University of Paraná (UFPR) Curitiba Brazil Telecommunications and Control Department Polytechnique School University of São Paulo Sao Paulo Brazil Industrial and Systems Engineering Graduate Program Pontifical Catholic University of Paraná Curitiba Parana Brazil

A complex optimization problem in robotics is the optimum movement between certain physical configurations while minimizing certain criteria. The fundamental objective in movement planning for robot arms is to minimize movement time, total distance, joint torque, avoiding obstacles and the robot arm itself as an obstacle. This paper presents a study on clonal selection algorithm (CSA) and CSA with oppositional approach to optimize the 2D point to point movement of a 3-links robot arm. Simulations with MATLAB of the problem were implemented with both techniques to minimize an objective function depending on the mentioned criteria. Results of both methods are presented, showing that the CSA with oppositional approach presented better results than the classical CSA in terms of convergence and response quality.

关键词： Manipulators Joints Planning Torque Trajectory Optimization

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Empirical Studies on Application of Genetic Algorithms and Ant Colony Optimization for Data Clustering

Empirical Studies on Application of Genetic Algorithms and A...

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Computer Science Society (SCCC) International Conference Chilean FLAGGED

作者： Thelma Elita Colanzi Wesley Klewerton Guez Assunção Aurora Trinidad Ramirez Pozo Ana Cristina B. Kochem Vendramin Diogo Augusto Barros Pereira Computer Science Postgraduate Program Federal University of Paraná (UFPR) Curitiba Paraná Brazil Graduate School of Electrical Engineering and Computer Science (CPGEI) Federal Technological University of Paraná (UTFPR) Curitiba Paraná Brazil Informatics Department (DAINF)

Cluster analysis is used in several research areas to classify data sets in groups by their similar characteristics. Metaheuristic-based techniques, such as Genetic Algorithms (GAs) and Ant Colony Optimization (ACO), have been applied in order to increase the clustering algorithm performance. GA and ACO-based clustering algorithms are capable of efficiently and automatically forming natural groups from a pre-defined number of clusters. This paper presents a GA and an ACO algorithm to the clustering problem. Both algorithms were refined using local search in order to improve the clustering accuracy. The results are compared on numeric UCI databases.

关键词： Clustering algorithms Search problems Equations Mathematical model Gallium Genetic algorithms Memetics

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State Observation For Non-Linear Switched Systems Using Non-Homogeneous HOSM Observers

State Observation For Non-Linear Switched Systems Using Non-...

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2010 49th IEEE Conference on Decision and Control

作者： Hector Rios Jorge Davila Leonid Fridman Program of Mastery and Doctorate in Electrical Engineering Engineering Faculty National Autonomous University of Mexico C.P. 04510 Mexico D.F. Section of Graduate Studies and Research ESIME-UPT National Polytechnic Institute C.P. 07340 Mexico D.F. Department of Control Division of Electrical Engineering Engineering Faculty National Autonomous University of Mexico C.P. 04510 Mexico D.F.

ISBN: (纸本)9781424477456

This article presents the problem of finite time reconstruction of the state and operating mode for a class of non-linear switched systems. The proposed method is based on the non-homogeneous high-order sliding mode approach and it is able to reconstruct both the state and operating mode of the switched system based only on measurable outputs. The observability is derived in terms of certain geometric restrictions on the vector fields of the switched system that require the availability of all its modes. The method does not require the system to be transformed to any normal form. Simulation results support the proposed method.

关键词： High-order Sliding Modes Non-Linear Ob-servers Switched Systems

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