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International Conference on Wavelet Analysis and Pattern Recognition (ICWAPR)

作者： Rong Sun Yihenew Wondie Marye Hua-An Zhao Graduate School of Science and Technology Computer Science and Electrical Engineering Department Kumamoto University Japan

ISBN: (纸本)9781479904143

The application of digital signal processing for detection and preservation of different species has been progressing rapidly. In this paper, one such better approach as applied to wild bird species is presented. Feature extraction is done by first performing wavelet transform on sampled bird sounds. After which frequency conversion and determination of mean value that determine the strength of the frequency ingredient is obtained; furthermore, the uniqueness of the modulation spectrum is used as an additional input for the detection mechanism of the birdcall's frequency. The obtained feature quantities then become input to the neural network to simplify classification of nocturnal wild bird species.

关键词： Birds Abstracts Seals

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High density impulse noise removal based on linear mean-median filter

High density impulse noise removal based on linear mean-medi...

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Korea-Japan Joint Workshop on Frontiers of computer Vision

作者： Fitri Utaminingrum Keiichia Uchimura Gou Koutaki Computer Science and Electrical Engineering Graduate School of Science and Technology Kumamoto University Kumamoto Japan

This paper presents Linear Mean-Median (LMM) filter that used to reduce impulse noise. LMM filter is a combination between Mean and Median filter. Wherein, linear value is acquired from the linearity between mean and median value. Mean and Median filter are only applied for free-noise pixel on the 3×3 windows that has been sorted from the smallest to the largest value. The mean value is obtained from the average value of all free-noise pixels without including the median pixel position. Meanwhile, median pixel is the middle position of the pixel that has been sorted. LMM uses nine sample pixels to determine a pixel for replacement a corrupted pixel. Our filter also provides the impulse noise prediction systems that serve as a facilitator to give information about noise content. If the noise is greater than 30%, the performance of LMM filter needs to be improved by an adaptive rank order mean filters. The filtering results have shown satisfactory results in terms of the quality result and the computation time process. A good image quality can be evidenced by PSNR (Peak Signal to Noise Ratio). Our methods always have higher PSNR value than the comparison methods. In addition, the speed computation time of our method is faster than the comparison method.

关键词： Noise Filtering theory Nonlinear filters Maximum likelihood detection Information filters

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Perspective of strategic plasma therapy for prognostic improvement of patients with ovarian cancer

Perspective of strategic plasma therapy for prognostic impro...

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2013 JSAP-MRS Joint Symposia

作者： Kajiyama, Hiroaki Utsumi, Fumi Nakamura, Kae Tanaka, Hiromasa Hori, Masaru Kikkawa, Fumitaka Department of Obstetrics and Gynecology Nagoya University Graduate School of Medicine Tsurumai-cho 65 Showa-ku Nagoya 466-8550 Japan Department of Electrical Engineering and Computer Science Graduate School of Engineering Nagoya University Furo-cho Chikusa-ku Nagoya 464-8603 Japan

Epithelial ovarian carcinoma (EOC) is the leading cause of cancer-related death in women in Western countries. Once patients experience recurrence, complete cure is almost impossible. We elucidated the effect of nonequilibrium atmospheric pressure plasma on the growth of EOC, particularly in plasma-activated medium (PAM). Furthermore, we examined the role of reactive oxygen species (ROS) or their scavengers in chronic antineoplastic-resistant EOC cells. As a result, we showed PAM induced the antitumor effect of EOC cells in vitro and in vivo, even in chemoresistant cells. To apply the plasma treatment for advanced or recurrent EOC, we suggest adopting indirect plasma therapy instead of direct plasma considering intraperitoneal administration in the future. However, there are several problems under investigation, including intracellular mechanism of antitumor effect by PAM and adverse event in vivo. Copyright © Materials Research Society 2013.

关键词： Deposition

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Data retention time of a new composed cell for dynamic random access memory

Data retention time of a new composed cell for dynamic rando...

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IEEE Conference on Electron Devices and Solid-State Circuits

作者： Yoshiro Riho Kazuo Nakazato Department of Electrical Engineering and Computer Science Graduate School of Engineering Nagoya University Nagoya Japan

ISBN: (纸本)9781467325240

Demand has been placed on systems that use a dynamic random access memory (DRAM) to not only increase the total capacity and data transfer speed but also reduce the operating and standby currents. Owing to data retention time restrictions, a refresh operation to rewrite data in memory cell capacitor is necessary, and power consumption for a refresh operation increases in proportion to the memory capacity. A new proposed method, partial access mode (PAM) is executed by conversion from 1 cell/bit to 2 N cells/bit to reduce the refresh power consumption and the frequency of disturbance effectively extending the memory cell retention time. Conventional computer systems generate a new low-power mode PAM in which all conventional functions and operations are maintained as a full array access mode. The effect of PAM is expressed as the refresh operation interval which is 2 N × 2 N times longer than that of conventional full array access mode. The extension of refresh operation interval is proved by the data retention time of 2 N cells/bit memory cell.

关键词： Random access memory Time-frequency analysis ISO standards

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Loss evaluation for ARCP Matrix Converter

Loss evaluation for ARCP Matrix Converter

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International Conference on Power Electronics and Drive Systems (PEDS)

作者： Syotaro Nagafuchi Takashi Abe Tsuyoshi Higuchi Division of Electrical Engineering and Computer Science Graduate School of Engineering Nagasaki University Nagasaki Japan

In order to reduce the EMI and to improve the efficiency of a Matrix Converter (MC), the auxiliary resonant commutated pole (ARCP) method, a variation of the soft switching technology, is applied to a MC and ARCPMC has been proposed. The ARCP soft switching technology is able to reduce the switching loss of main switches. This paper aims to clarity the switching and conduction losses of main switches and auxiliary switches. And also, those losses characteristics are compared with the loss of conventional MC.

关键词： Switches Matrix converters Switching loss Soft switching Pulse width modulation Insulated gate bipolar transistors Capacitors

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A Study of Rotor Position Control for Switched Reluctance Motor

A Study of Rotor Position Control for Switched Reluctance Mo...

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IEEE International Conference on Power Electronics and Drive Systems

作者： Yoshitaka Niwa Takashi Abe Tsuyoshi Higuchi Division of Electrical Engineering and Computer Science Graduate School of Engineering Nagasaki University Nagasaki Japan

ISBN: (纸本)9781467317900

This paper describes an approach to realize precision and quick position control for Switched Reluctance Motor (SRM). But the magnetic nonlinearity of SRM makes the torque and current control complex and unstable. However, with regard to the high torque and rapid response, SRM has the potential to achieve higher performance. The proposed position control system has the torque controller which considers the magnetic nonlinearity and manufacturing flaw. In the torque controller, the reference current is calculated using the look-up tables tabulated by measured torque characteristics. The experimental results show that the proposed method has the position control capability at arbitrary rotor position.

关键词： position proposed manufacturing

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Hardware-based parallel firefly algorithm for embedded applications

Hardware-based parallel firefly algorithm for embedded appli...

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2013 NASA/ESA Conference on Adaptive Hardware and Systems, AHS 2013

作者： Muñoz, Daniel M. Llanos, Carlos H. Dos Santos Coelho, Leandro Ayala-Rincón, Mauricio Electronics Engineering Graduate Program Faculty of Gama University of Brasilia Brasilia DF Brazil Department of Mechanical Engineering Automation and Control Group/GRACO University of Brasilia Brasilia DF Brazil Industrial and Systems Engineering Graduate Program LAS/PPGEPS Pontifical Catholic University of Parana Curitiba Parana Brazil Departments of Computer Science and Mathematics University of Brasilia Brasilia DF Brazil

ISBN: (纸本)9781467363839

The firefly algorithm (FA) is a new population-based metaheuristic bioinspired on the behavior of the flashing characteristics of fireflies. As a population-based algorithm, the FA suffers from large execution times specifically for embedded optimization problems with computational limitations. For reducing execution times we propose a hardware parallel architecture of the FA algorithm that facilitates the implementation in Field programmable Gate Arrays (FPGAs). In addition, this work proposes the application of the opposition-based learning (OBL) approach to the FA algorithm. The respective hardware implementation (HPOFA) was mapped into a Virtex5 FPGA device and numerical experiments using four well-known benchmark problems demonstrate that the opposition-based approach allows the FA algorithm to improve its functionality, preserving the swarm diversity and avoiding the premature convergence problem. Synthesis results point out that the HPOFA architecture is effectively mapped in hardware and is suitable for embedded applications. © 2013 IEEE.

关键词： Parallel architectures

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Wavelength dependence of photon-induced interface defects in hydrogenated silicon nitride/Si structure during plasma etching processes

Wavelength dependence of photon-induced interface defects in...

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作者： Fukasawa, Masanaga Matsugai, Hiroyasu Honda, Takahiro Miyawaki, Yudai Kondo, Yusuke Takeda, Keigo Kondo, Hiroki Ishikawa, Kenji Sekine, Makoto Nagahata, Kazunori Uesawa, Fumikatsu Hori, Masaru Tatsumi, Tetsuya Semiconductor Technology Development Division Advanced Device Technology Platform Sony Corporation Atsugi Kanagawa 243-0014 Japan Department of Electrical Engineering and Computer Science Graduate School of Engineering Nagoya University Nagoya 464-8603 Japan

The wavelength dependence of SiNx:H/Si interface defect generation caused by vacuum ultraviolet (VUV)/UV radiation from plasma etching processes was investigated. VUV radiation (λ x:H/Si interface, since all the radiation in this wavelength range was absorbed in the upper SiN x:H film. However, UV radiation (200 x:H/Si interface and damage the interface. Direct UV radiation reaching the SiNx:H/Si interface dissociated the chemical bonds at the interface and generated interface-trapped charges. The estimated total energy of absorbed photons (Etotal;200 it) measured by capacitance-voltage measurement. However, the mechanism underlying the relationship between Etotal and Dit is not yet clear. Visible radiation (λ>400nm) had no influence on damage generation on the SiNx:H/Si structure, since the visible radiation was transmitted through upper SiNx:H film and underlying interface layer. The results revealed that UV radiation transmitted through the upper dielectrics can cause the electrical characteristics of underlying metal-oxidesemiconductor (MOS) devices to fluctuate. © 2013 The Japan Society of Applied Physics.

关键词： Capacitance

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Multiscale, dictionary-based speckle denoising

Multiscale, dictionary-based speckle denoising

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Computational Optical Sensing and Imaging, COSI 2013

作者： Krishnamurthy, Kalyani Mrozack, Alex Maggioni, Mauro Brady, David Duke Imaging and Spectroscopy Program Department of Electrical and Computer Engineering Duke University Box 90291 Durham NC 27708 United States Departments of Mathematics and Computer Science Duke University Box 90320 Durham NC 27708 United States

We propose a multiscale, dictionary-based, data-adaptive estimation method to recover intensities from multiplicative, speckle data. The proposed method preserves the edges and textures in the underlying image while s... 详细信息

ISBN: (纸本)9781557529756

关键词： Speckle

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Towards real-time communication between in vivo neurophysiological data sources and simulator-based brain biomimetic models

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Journal of computational surgery 2014年第12期3卷 1-23页

作者： Giljae Lee Andréa Matsunaga Salvador Dura-Bernal Wenjie Zhang William W Lytton Joseph T Francis José Ab Fortes Department of Electrical and Computer Engineering University of Florida P.O. Box 116200 216 Larsen Hall Gainesville 32611 FL USA. Department of Physiology and Pharmacology State University of New York Downstate Medical Center 450 Clarkson Avenue Brooklyn 11203 NY USA. Department of Physiology and Pharmacology State University of New York Downstate Medical Center 450 Clarkson Avenue Brooklyn 11203 NY USA Department of Neurology State University New York Downstate Medical Center 450 Clarkson Avenue Brooklyn 11203 NY USA Department of Neurology Kings County Hospital 450 Clarkson Avenue Brooklyn 11203 NY USA Joint Program in Biomedical Engineering at Polytechnic Institute of New York University and State University of New York Downstate 450 Clarkson Avenue Brooklyn 11203 NY USA Program in Neural and Behavioral Science at State University of New York Downstate 450 Clarkson Avenue Brooklyn NY 11203 USA The Robert F. Furchgott Center for Neural & Behavioral Science State University of New York Downstate Medical Center 450 Clarkson Avenue Brooklyn NY 11203 USA. Department of Electrical and Computer Engineering University of Florida P.O. Box 116200 216 Larsen Hall Gainesville 32611 FL USA Department of Computer and Information Science and Engineering University of Florida P.O. Box 116120 E301 CSE Building Gainesville 32611 FL USA.

Development of more sophisticated implantable brain-machine interface (BMI) will require both interpretation of the neurophysiological data being measured and subsequent determination of signals to be delivered back to the brain. Computational models are the heart of the machine of BMI and therefore an essential tool in both of these processes. One approach is to utilize brain biomimetic models (BMMs) to develop and instantiate these algorithms. These then must be connected as hybrid systems in order to interface the BMM with data acquisition devices and prosthetic devices. The combined system then provides a test bed for neuroprosthetic rehabilitative solutions and medical devices for the repair and enhancement of damaged brain. We propose here a computer network-based design for this purpose, detailing its internal modules and data flows. We describe a prototype implementation of the design, enabling interaction between the Plexon Multichannel Acquisition Processor (MAP) server, a commercial tool to collect signals from microelectrodes implanted in a live subject and a BMM, a NEURON-based model of sensorimotor cortex capable of controlling a virtual arm. The prototype implementation supports an online mode for real-time simulations, as well as an offline mode for data analysis and simulations without real-time constraints, and provides binning operations to discretize continuous input to the BMM and filtering operations for dealing with noise. Evaluation demonstrated that the implementation successfully delivered monkey spiking activity to the BMM through LAN environments, respecting real-time constraints.

关键词： Biomimetic models Brain-machine interfaces Computational neuroscience Neuroprosthetics

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