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Optimization of a z-source DC circuit breaker

Optimization of a z-source DC circuit breaker

引用

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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MODEL-BASED FOOD VOLUME ESTIMATION USING 3D POSE

MODEL-BASED FOOD VOLUME ESTIMATION USING 3D POSE

引用

IEEE International Conference on Image Processing

作者： Chang Xu Ye He Nitin Khanna Carol J. Boushey Edward J. Delp School of Electrical and Computer Engineering Purdue University Department of Electronics and Communication Engineering Graphic Era University Dehradun India Cancer Epidemiology Program University of Hawaii Cancer Center

ISBN: (纸本)9781479923427

We are developing a dietary assessment system to automatically identify and quantify foods and beverages consumed by analyzing meal images captured with a mobile device. After food items are segmented and identified, accurately estimating the volume of the food in the image is important for determining the nutrient content of the food. In this paper, we proposed a novel food portion size estimation method for rigid food items using a single image. First, we create a 3D graphical model during the training step using 3D reconstruction from multiple views. Then, for each food image, we determine the translation and elevation parameters of each of the food items, which are relative to the camera coordinate through camera calibration. Using these geometric parameters we project the pre-built 3D model of each food item back to the image plane. Subsequently, the remaining degrees-of-freedom (DOF) for the final pose is estimated by image similarity measure. The experimental results of our volume estimation method for four food categories validate the accuracy and reliability of our model-based approach.

关键词： dietary assessment 3D reconstruction 3D model rendering image segmentation pose estimation three-dimensional displays Food pose estimation image segmentation images Posing Imagery (Psychotherapy) image plane camera calibration Image Three Dimensions geometric parameter

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CONTEXT BASED FOOD IMAGE ANALYSIS

CONTEXT BASED FOOD IMAGE ANALYSIS

引用

IEEE International Conference on Image Processing

作者： Ye He Chang Xu Nitin Khanna Carol J. Boushey Edward J. Delp School of Electrical and Computer Engineering Purdue University Department of Electronics and Communication Engineering Graphic Era University Dehradun India Cancer Epidemiology Program University of Hawaii Cancer Center

ISBN: (纸本)9781479923427

We are developing a dietary assessment system that records daily food intake through the use of food images. Recognizing food in an image is difficult due to large visual variance with respect to eating or preparation conditions. This task becomes even more challenging when different foods have similar visual appearance. In this paper we propose to incorporate two types of contextual dietary information, food co-occurrence patterns and personalized learning models, in food image analysis to reduce ambiguity in food visual appearance and improve food recognition accuracy. We evaluate our model on 1453 food images acquired by 45 participants in natural eating conditions. The result shows that incorporating contextual dietary information improves the food categorization accuracy by about 10%.

关键词： Dietary Assessment Contextual Information Food Recognition Image Segmentation Fodder Food image segmentation Food Intake image analysis images

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Assessing Organizational Learning in IT Organizations: An Experience Report from Industry

Assessing Organizational Learning in IT Organizations: An Ex...

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Joint Conference of the Int'l Workshop on and International Conference on Software Process and Product Measurement Software Measurement

作者： Güven Özen N. Alpay Karagöz Oumout Chouseinoglou Semih Bilgen Software Management Program METU Ankara Turkey Statistics and Computer Science Department Başkent University Ankara Turkey Electrical and Electronics Engineering Department METU Ankara Turkey

With the increase in demand for higher-quality and more capable IT services, IT organizations in order to obtain competitive advantage require extensive knowledge that needs to be shared and reused among different entities within the organization. The existing IT Service Management (ITSM) mechanisms mention the importance of organizational learning (OL) and knowledge management (KM) for IT organizations. However, they do not explicitly address how OL capabilities of an IT organization can be assessed. This paper, by using an OL assessment model developed for software organizations, namely AiOLoS, shows that with the proper adjustment, the application of the model to IT organizations is feasible. We report the results of applying the model in four functional teams in an IT organization from private sector.

关键词： Organizations Software Software measurement Phase measurement Training Length measurement

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Band classification based on chromosome shapes

Band classification based on chromosome shapes

引用

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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On the development of a small hand-held multi-UAV platform for surveillance and monitoring

On the development of a small hand-held multi-UAV platform f...

引用

International Conference on Unmanned Aircraft Systems (ICUAS)

作者： Gustavo S. C. Avellar Gonçalo D. Thums Rogério R. Lima Paulo Iscold Leonardo A. B. Tôrres Guilherme A. S. Pereira Graduate Program in Electrical Engineering Federal University of Minas Gerais Belo Horizonte Minas Gerais Brazil Mechanical Engineering Department Federal University of Minas Gerais Belo Horizonte Minas Gerais Brazil Electronics Engineering Department Federal University of Minas Gerais Belo Horizonte Minas Gerais Brazil Electrical Engineering Department Federal University of Minas Gerais Belo Horizonte Minas Gerais Brazil

This paper addresses the ongoing process of development of a small hand-held multiple unmanned aerial vehicle platform for surveillance and monitoring. The project cover all phases of development, from aerodynamic design and mechanical assembly, through fine tuning low level control loops and design of an attitude and heading reference system, up to implementation of navigation algorithms and finally flight testing. Commercial hardware is used to speed up development, allowing the team responsible for implementing the navigation algorithms to execute and test while the team responsible for the aerodynamics and electronics can design and compare results.

关键词： Global Positioning System Aircraft Sensors Aerodynamics Algorithm design and analysis Hardware

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Optimization of a z-source DC circuit breaker

Optimization of a z-source DC circuit breaker

引用

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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A room temperature, zero force, wafer-level attachment method for MEMS integration

A room temperature, zero force, wafer-level attachment metho...

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IEEE International Conference on Micro Electro Mechanical Systems

作者： Levent Beker Özge Zorlu Haluk Külah METU MEMS Center Micro and Nanotechnology Graduate Program Middle East Technical University Ankara Turkey METU MEMS Center Middle East Technical University Ankara Turkey METU MEMS Center Micro and Nanotechnology Graduate Program Department of Electrical and Electronics Engineering Middle East Technical University Ankara Turkey

This paper presents a wafer level attachment method for handling various shaped structures for MEMS processes, using parylene as an interlayer material. In this method, a handle wafer containing pillars and perforations is utilized, and structures are attached to the handle wafer through a parylene coating process realized at room temperature with no applied force. It is observed that pillars with 20 μm height, 2.5 mm side length, and 4.5 mm spacing can successfully be used to attach two 4" substrates to each other. The shear strength between the attached substrates is measured as 0.49 MPa, proving the feasibility of the method for integrating various materials into MEMS processes.

关键词： Substrates Bonding Force Micromechanical devices Coatings Silicon

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Development of a Brain-Computer Interface system based on sensorimotor rhythms

Development of a Brain-Computer Interface system based on se...

引用

2012 ISSNIP Biosignals and Biorobotics Conference: Biosignals and Robotics for Better and Safer Living, BRC 2012

作者： Carra, Michel Balbinot, Alexandre Federal University of Rio Grande Do sul Postgraduate Program in Electrical Engineering Laboratory of Instrumentation Electrical and Electronics Brazil

ISBN: (纸本)9781467324762

In this work we developed a Brain-Computer Interface system using brain signals from somatosensory cortex. As stimulus, arrows were shown to the right and left to five subjects, who perform imaginary hand movement tasks to the side indicated by the arrow. Subject-specific parameters were selected using DSLVQ (Distinctive Sensitive Learning Vector Quantization) and Lateralization Index (LI), in order to extract the most relevant features, resulting in a higher hit rate in the classification stage. Online classification was performed with Linear Discriminant Analysis resulting in hit rates between 81 and 92.1%. © 2012 IEEE.

关键词： Brain computer interface

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Frictional characteristics measurement of a ceramic aerostatic linear bearing 5

Frictional characteristics measurement of a ceramic aerostat...

引用

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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