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检索条件"机构=Computer and Network System Research Laboratory Department of Computer Engineering"

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Non-linear FE-based modeling of induction machine for integrataed drives

Non-linear FE-based modeling of induction machine for integr...

引用

IET 8th International Conference on Computation in Electromagnetics (CEM 2011)

作者： A. Sarikhani O. A. Mohammed Energy System Research Laboratory Department of Electrical and Computer Engineering Florida International University Miami FL USA

The linear and non-linear FE-based model of a three phase wound rotor induction machine is presented. The effect of stator and rotor currents on the self and mutual inductance is considered. The mathematical representation of the machine in presence of saturation is developed. The calculated model is compared with a simple d-q model, full FE- model, and a linear FE-based phase variable model. The calculated result shows a good match in accuracy with full-finite element model and in run-time with the d-q model.

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An application of fractional intelligent robust controller for electromechanical valve

An application of fractional intelligent robust controller f...

引用

2011 World Congress on Information and Communication Technologies, WICT 2011

作者： Banerjee, Tribeni Prasad Saha, Suman Das, Swagatam Abraham, Ajith Dept. of Electronics and Telecommunication Engineering Jadavpur University Kolkata 700 032 India CSIR-Central Mechanical Engineering Research Institute Drives and Control System Laboratory Durgapur-713209 West-Bengal India Scientific Network for Innovation and Research Excellence WA United States EU Center of Excellence Faculty of Electrical Engineering and Computer Science VSB - Technical University of Ostrava Czech Republic

ISBN: (纸本)9781467301251

The paper analyzed and model of a fault tolerant electromechanical controlled worm gear driven fuel shut off valve for aerospace application. The analysis is mainly on design a reduced order fractional controller. This is for controlling the velocity of worm gear so that the friction torque due to uneven rotational speed can be avoided. Because with the friction and stiction and backlash the valve system performance is reduced and more and more unstable this leads the system to failure. The proposed controller can provide robustness against the uncertain loading torque and system parameter. © 2011 IEEE.

关键词： Controllers

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Electrically controlled pulse compression using a silicon waveguide

Electrically controlled pulse compression using a silicon wa...

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CLEO: Science and Innovations

作者： Gao, Shiming Tien, En-Kuang Huang, Yuewang Liu, Qiang He, Sailing Boyraz, Ozdal Centre for Optical and Electromagnetic Research State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou 310058 China Advanced Photonics Device and System Laboratory Department of Electrical Engineering and Computer Science University of California Irvine CA 92697 United States

The electrical control of pulse width in a two-photon absorption-based silicon pulse compressor is demonstrated. Approximately 30% improvement in pulse compression rate is experimentally measured under a forward volta... 详细信息

ISBN: (纸本)9781557529107

关键词： Two photon processes

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Multi-rate low density generator matrix code for satellite laser communications

Multi-rate low density generator matrix code for satellite l...

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International Conference on Space Optical systems and Applications

作者： Matsuo, Hirotaka Okamoto, Eiji Iwanami, Yasunori Shoji, Yozo Toyoshima, Morio Takayama, Yoshihisa Department of Computer Science and Engineering Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho Syowa-ku Nagoya 466-8555 Japan Space Communication Systems Laboratory Wireless Network Research Institute National Institute of Information and Communications Technology 4-2-1 Nukui-Kitamachi Koganei Tokyo 184-8795 Japan

ISBN: (纸本)9781424496853

We propose a new transmission scheme of multi-rate low density generator matrix (LDGM) code suitable for optical satellite communications. Since the proposed scheme doesn't utilize a preamble transmission of the rate information nor the repeat request scheme, a long feedback delay in the satellite link and a decrease of transmission efficiency can be avoided. Then, an adaptive rate transmission only with forward error correction (FEC) is achieved and the transmitter can choose the quality or the rate-efficiency of transmission from the transmitter-side state. In the receiver, an exact rate-decision and decoding are conducted without the preamble. It is shown that the proposed scheme is effective in the satellite-to-ground optical link by the computer simulations. © 2011 IEEE.

关键词： Iterative decoding

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Scalable control plane architecture for optical flow switched networks

Scalable control plane architecture for optical flow switche...

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Optical Fiber Communication (OFC) Conference

作者： Vincent W.S. Chan Zhang Lei Claude E. Shannon Communication and Network Group Research Laboratory of Electronics Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology USA

In this paper an OFS architecture that exploits the strength of optics to serve large transactions is described. The shift towards OFS requires some architectural elements of the network- from the physical layer to the higher network layers, as well as network management and control, be substantially redesigned at the fundamental level for the network architecture to be scalable and implementable.

关键词： Optical switches Entropy Wide area networks Optical fiber networks Image motion analysis computer vision computer architecture

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Assessing lung volumetric variation to detect and stage COPD

Assessing lung volumetric variation to detect and stage COPD

引用

2011 1st Middle East Conference on Biomedical engineering, MECBME 2011

作者： Hosseini, M. Parsa Soltanian-Zadeh, Hamid Akhlaghpoor, Shahram Department of Electrical Engineering Islamic Azad University Science and Research Branch of Tehran Tehran Iran Image Analysis Laboratory Department of Radiology Henry Ford Health System Detroit MI United States Department of Radiology Tehran University of Medical Sciences Sina Hospital Tehran Iran Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran

ISBN: (纸本)9781424470006

Chronic obstructive pulmonary disease (COPD) is a devastating disease. In this paper, we propose a novel method for scoring of air trapping in the lungs for detection and evaluation of COPD. The proposed method finds volumetric changes of the lungs from inspiration to expiration. To this end, trachea CT images at full inspiration and expiration are compared. For this comparison, the lungs parenchyma in the inspiration and expiration images are found and changes in the surface and volume of the lungs between inspiration and expiration are used to define quantitative measures (features). Using these features, the subjects are classified into two groups of normal class and COPD patients using a Bayesian classifier. In addition, t-tests are applied to evaluate discrimination powers of the features for this classification. The main advantage of the proposed method is its ability to estimate air trapping in the lungs from CT images without human intervention. The proposed method may assists radiologists in the detection of COPD as a computer aided diagnosis (CAD) system. It may also assist them with the scoring of the disease (severity of air trapping in the lungs). © 2011 IEEE.

关键词： computerized tomography

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A novel method for identification of COPD in inspiratory and expiratory states of CT images

A novel method for identification of COPD in inspiratory and...

引用

2011 1st Middle East Conference on Biomedical engineering, MECBME 2011

ISBN: (纸本)9781424470006

Chronic obstructive pulmonary disease (COPD) refers to a group of lung diseases that block airflow and cause a huge degree of human suffering. While there is no cure for COPD and the lung damage that results in this disease cannot be reversed, it is very important to diagnose it as early as possible. Additional to diagnosis, using a mathematical model to estimate severity of disease would be helpful for evaluation of treatment effects. This paper presents a new method for identifying COPD from three-dimensional (3-D) pulmonary X-ray CT images. The method has five main steps. First, corresponding positions of lungs in inspiration and expiration are found based on anatomical structures. Then, lung regions are segmented from the CT images by active contours. Next, the left and right lungs are separated using a sequence of morphological operations. Then, parenchyma variations in each lung are found as a relationship between inspiratory and expiratory states. Finally, a classifier is used to decide about the disease and its severity. A t-test is done to evaluate the results. Twelve patients with variable severity of COPD and twelve normal adults were included in this study. The proposed method may assist radiologists in the detection of COPD as a computer aided diagnosis (CAD) system. © 2011 IEEE.

关键词： Pulmonary diseases

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Toward a common framework for analysis of high performance controls of PMS motor drives

Toward a common framework for analysis of high performance c...

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Power Electronic and Drive systems and Technologies Conference (PEDSTC)

作者： Rohollah Shafaie Sadegh Vaez-Zadeh Department of Electrical Engineering Iran University of Science and Technology Tehran Iran Advanced Motion System Research Laboratory School of Electrical and Computer Engineering University of Tehran Tehran Iran

An analysis of permanent magnet synchronous (PMS) motors is carried out to establish a basis for high performance control of the motors. It is then used to formulate vector control and direct torque control of the machines. This provides an insight into the advanced AC motor control methods in general and into vector control and direct torque control in particular, providing new opportunities for proposing novel AC motor control methods.

关键词： Stators Permanent magnet motors Torque Hysteresis motors Couplings

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Voxel based treatment prediction using diffusion anisotropy indices and spatial information in Glioblastoma Multiform tumor

Voxel based treatment prediction using diffusion anisotropy ...

引用

2011 18th Iranian Conference of Biomedical engineering, ICBME 2011

作者： Sabahi, Hadi Soltanian-Zadeh, Hamid Scarpace, Lisa Mikkelsen, Tom Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran 14395-515 Iran Image Analysis Laboratory Radiology Department Henry Ford Hospital Detroit MI 48202 United States Hermelin Brain Tumor Research Center Neurosurgery Department Henry Ford Health System Detroit MI 48202 United States

ISBN: (纸本)9781467310055

In this paper, we propose a method to predict the outcome of Bevacizumab therapy on Glioblastoma Multiform (GBM) tumors. The method uses diffusion anisotropy indices (DAI) and spatial information to predict the treatment response of each tumor voxel. These DAIs are Fractional Anisotropy, Mean Diffusivity, Relative Anisotropy, and Volume Ratio, extracted from Diffusion Tensor Imaging (DTI) data before treatment. The spatial information is considered as the distance of each tumor voxel from the tumor center, extracted from pre-treatment post-contrast T1-weighted Magnetic Resonance Images (pc-T1-MRI). DAIs and spatial information of each tumor voxel are considered as feature vector. DTI and pc-T1-MRI are gathered before and after the treatment of seven GBM patients. First, DAIs of all brain voxels and the distance of each tumor voxel from the tumor center are calculated. Second, the method registers pre-treatment DAI maps and post-treatment pc-T1-MRI to pre-treatment pc-T1-MRI. Next, the tumor is segmented using thresholding technique from pc-T1-MRI. Then, Gd-enhanced voxels of the pre- and post-treatment pc-T1-MRI are compared to label the feature vectors. Three classifiers were evaluated, including Support Vector Machine, K-Nearest Neighbor, and Artificial Neural network. Classification results show a preference for K-Nearest Neighbor based on well-established performance measures. © 2011 IEEE.

关键词： Tumors

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Multi-granularity dynamic analysis of complex software networks

Multi-granularity dynamic analysis of complex software netwo...

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： Bing Li Weifeng Pan Jinhu Lü State Key Laboratory Software Engineering and School Computer and Complex Network Research Center Wuhan University of China Wuhan China State Key Laboratory Software Engineering Wuhan University of China Wuhan China School Electrical Computer Engineering RMIT University Melbourne Australia Acad. Mathematics System Science Chinese Academy and Sciences Beijing China

Software systems represent one of the most complex man-made systems. In this paper, we analyze the evolution of Object-Oriented (OO) software using complex network theory from a multi-granularity perspective. First, the software net works are constructed for a multi-version software system at different levels of granularity. Then, some parameters used in complex network theory are introduced to study the topological characteristics of these software networks. By investigating the parameters' values in consecutive software networks, we have a better understanding about software evolution. A case study on an open source OO project, Azureus, is conducted as an example to illustrate our approach. It uncovers some underlying dynamic characteristics of OO systems. These results provide a different dimension to our understanding of software system dynamics and also are very useful for the design and development of OO software systems.

关键词： Logic gates Communities US department of Defense

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