Reconciling Motor Performance Indicators From Theoretical Calculations And Laboratory Tests,
2010
Missouri University of Science and Technology
Reconciling Motor Performance Indicators From Theoretical Calculations And Laboratory Tests, Himanshu Hirlekar, Badrul H. Chowdhury, Stephen Ruffing
Electrical and Computer Engineering Faculty Research & Creative Works
Quite often because of the complexity in the design of large industrial motors, the theoretical motor parameter calculations do not match actual results from laboratory tests. Thus, it becomes important to predict the amount of discrepancy between the two methods to develop confidence in the motor parameter calculations. This paper discusses the development of multiple artificial neural networks (ANNs) designed to predict the ratios of measured parameters to calculated parameters, given the geometry and construction of the motor. These ratios represent correction factors which can be applied to the values calculated from the theoretical program, which, in this case, is …
Implementing Frequency Regulation Capability In A Solar Photovoltaic Power Plant,
2010
Missouri University of Science and Technology
Implementing Frequency Regulation Capability In A Solar Photovoltaic Power Plant, Venkata Ajay Kumar Pappu, Badrul H. Chowdhury, Ravi Bhatt
Electrical and Computer Engineering Faculty Research & Creative Works
Photovoltaic power plants pose some challenges when integrated with the power grid. the PV plants always focus on extracting the maximum power from the arrays. This makes the PV system unavailable for helping in regulating the grid frequency as compared to conventional generators. the objective of this paper is to introduce a pseudo power point tracking which provides frequency regulation functionality to PV systems. This method is fast and helps in creating a reserve which can be utilized for frequency stability. Control technique discussed in this paper allows the control over the amount of active power injected into the grid. …
Eit, Slow Light, And Sealing Methods For Embedding Rubidium Into The Arrow System,
2010
Brigham Young University - Provo
Eit, Slow Light, And Sealing Methods For Embedding Rubidium Into The Arrow System, Katherine Barnett Hurd
Theses and Dissertations
Light-matter interactions are fundamentally based on the quantum mechanical principles that govern photons, electrons and other fundamental particles. One very interesting phenomenon within all of light-matter interactions is Electromagnetically Induced Transparency(EIT). This phenomenon causes an otherwise absorbing atomic transition to stop absorbing through quantum mechanical interference of probability wave functions. Corresponding to that change in absorption, will be a sudden, large change in the index of refraction. This change in the index of refraction leads to another phenomenon in which the group velocity of light can be slowed down dramatically. In the past, many researchers have been able to achieve …
Sidescan Sonar Image Processing:Correcting Brightness Variation And Patching Gaps,
2010
Department of Digital Entertainment and Game Design, Taiwan Shoufu University, Tainan County, Taiwan, R.O.C
Sidescan Sonar Image Processing:Correcting Brightness Variation And Patching Gaps, Yet-Chung Chang, Shu-Kun Hsu, Ching-Hui Tsai
Journal of Marine Science and Technology–Taiwan
Sidescan sonar data are typically presented as gray level images. However, sidescan images often show striking variations in brightness. These variations, caused by the sonar beam pattern and the constantly changing attitude of the towfish, make the images difficult to read as pictures of the seabed. This reduces the utility of the images for marine geologists. In this paper, the effects of the sonar beam pattern across the swath are corrected using a normalization process based on the average signal intensity for each grazing angle. Noise along the track, which is generally caused by changes in the attitude of the …
The Sensitivity Analysis Of A Mems Microphone With Different Membrane Diameters,
2010
Department of Marine Engineering, National Kaohsiung Marine University, Kaohsiung, Taiwan, R.O.C
The Sensitivity Analysis Of A Mems Microphone With Different Membrane Diameters, Cheng-Ta Yang
Journal of Marine Science and Technology–Taiwan
In MEMS capacitive microphone design, it is very critical to get highest yielding rate and sensitivity as the two major factors dominate structure design of microphone. The centralpost MEMS microphone is introduced in this paper to differentiate from traditional fixed membrane boundary microphone since the construction is simple and only few masks are required in the process so that the yielding can be greatly enhanced. Thus, it is necessary to find the relationship between the sensitivity and dimension of the diameter of the membrane. The main research steps described in this paper include using CoventorWarer to develop one analysis model …
A New Calibration Method For Low Cost Mems Inertial Sensor Module,
2010
Department of Systems and Naval Mechatronic Engineering, National Cheng Kung University, Tainan 701, Taiwan, R.O.C.
A New Calibration Method For Low Cost Mems Inertial Sensor Module, Sheng-Chih Shen, Chia-Jung Chen, Hsin-Jung Huang
Journal of Marine Science and Technology–Taiwan
This paper presents a new calibration method to overcome the challenges of MEMS inertial sensors for underwater navigation. The MEMS inertial sensor module is composed of an accelerometer, a gyroscope and a circuit of signal process. For navigation estimation, it is easy to be influenced by errors which come from MEMS inertial sensors. In general, the sources of error can be categorized into two groups, deterministic type and stochastic type. The former primarily includes bias errors, misalignment and nonlinearity; the latter contains temperature effect and signal drifting. Subsequently, the linearity calibration is used to modify the deterministic error and the …
The Performance Of Indium Tin Oxide Films Deposited On Plastic Substrate Applied For Solar-Cell Buoy,
2010
Department of Electrical Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan, R.O.C.
The Performance Of Indium Tin Oxide Films Deposited On Plastic Substrate Applied For Solar-Cell Buoy, Chien-Kun Wang, Jyh-Jier Ho, Sung-Jen Nien, Yuang-Tung Cheng, William Lee, Chih-Chiang Lu, Bao-Shun Yau, Hsing-Wang Tsai, Chung-Cheng Chang
Journal of Marine Science and Technology–Taiwan
In this paper, we report the indium tin oxide (ITO) films deposited on the polyethyene terephthalate (PET) substrate, which surface is treated with detergent solution. The ITO films are deposited on room temperature by direct current (DC) magnetron sputtering from a ceramic target of a 90% In-10% Sn alloy. The deposited opto-electric ITO films on PET with detergent treatment are 83.4% average visible transparency, and 5.8 × 10-4 Ω-cm resistivity, respectively. And then, we use the spin coating to form the polymer solar cell. Under optimal conditions of surface treatment and film deposition, the experimental result shows 2.12% of the …
Signal Subspace Transformation For Direction-Of-Arrival Estimation Of Wideband Sources In Near Field,
2010
Department of Communications, Navigation and Control Engineering, National Taiwan Ocean University, Taiwan, R.O.C
Signal Subspace Transformation For Direction-Of-Arrival Estimation Of Wideband Sources In Near Field, Lena Chang
Journal of Marine Science and Technology–Taiwan
A novel adaptive signal subspace transformation for direction-of-arrival (DOA) estimation of wideband sources in the near-field is proposed in this paper. The method is composed of two transformations: signal subspace focusing (SSF) and far-field transformation (FFT). SSF aligns the signal subspaces for different frequencies in the bandwidth of the sources based on focusing matrices. FFT transforms the near-field steering vector to be the far-field steering vector with same direction-of-arrival (DOA) allocation. By the way, we simplify the location estimation of wideband sources in the near-field to be narrowband sources in the far field. The proposed method can track the DOAs …
The Study On The Asymptotic Profile And The Flow Patterns In Front Of A Long Bubble Through A Circular Tube,
2010
Department of Mechanical Engineering, Chung-Yuan Christian University, Chung-Li 32023, Taiwan, R.O.C
The Study On The Asymptotic Profile And The Flow Patterns In Front Of A Long Bubble Through A Circular Tube, Cheng-Hsing Hsu, Chia-Chuan Kuo, Ching-Chuan Chang, Kuang-Yuan Kung
Journal of Marine Science and Technology–Taiwan
Department of Civil Engineering, Army Academy, Chung-Li, Taoyuang, Taiwan, R.O.C
An Algorithm For Predicting Attitudes Of Floating Bodies With Arbitrary Configurations In Liquids,
2010
Department of Mechanical and Automation Engineering, I-Shou University, Taiwan, R.O.C.
An Algorithm For Predicting Attitudes Of Floating Bodies With Arbitrary Configurations In Liquids, Jiann-Lin Chen, Chun-I Chen, Li-Ming Chu
Journal of Marine Science and Technology–Taiwan
A robust and efficient algorithm is proposed to quasiunsteadily predict attitudes of floating bodies with arbitrary configurations. Numerical techniques for accuracy and computing time saving are addressed. A floating cylinder was modeled as a benchmark, by theoretical and experimental approaches, to validate the developed program. Attitudes of two kinds of floating bodies, which are a body composed of multiple objects and a submarine-like submersible, were simulated to show the feasibility of the present algorithm. Interestingly, the simulated results of a slender body, such as a cylinder or a submersible, show that the attitude variation is very sensitive to the longitudinal …
Fast Block Motion Estimation With Edge Alignment On H.264 Video Coding,
2010
Department of Computer Science and Engineering, National Taiwan Ocean University, 2, Pei-Ning Road, Keelung 20224, Taiwan, R.O.C.
Fast Block Motion Estimation With Edge Alignment On H.264 Video Coding, Chi-Han Chuang, Chien-Hua Su, Shyi-Chyi Cheng
Journal of Marine Science and Technology–Taiwan
This paper presents a novel block matching scheme with edge alignment strategy on H.264 video coding, which uses multiple references and multiple block sizes for motion estimation in order to improve the rate-distortion performance. In H.264, the computational complexity is linearly dependent on the number of allowed reference frames and block sizes using the full exhaustive search. Many fast block-matching algorithms reduce the computational complexity of motion estimation by carefully designing the search patterns with different shapes or sizes which have significant impact on the search speed and distortion performance. However, the search speed and the distortion performance conflict often …
Improving The Emulsion Stability Of Sponge Cake By The Addition Of ?-Polyglutamic Acid,
2010
Department of Baking Technology and Management, National Kaohsiung University of Hospitality and Tourism, Taiwan, R.O.C
Improving The Emulsion Stability Of Sponge Cake By The Addition Of ?-Polyglutamic Acid, Yung-Shin Shyu, Wen-Chieh Sung
Journal of Marine Science and Technology–Taiwan
The batter properties of sponge cake with the addition of γ-polyglutamic acid (PGA) at different levels (0.05, 0.1, 0.5 gkg-1, w/w) was evaluated. The viscosity, emulsion stability and foam stability increased at the addition of 0.5 gkg-1 PGA level. PGA caused significant declines in the differential scanning calorimetry (DSC) enthalpy, onset and peak temperatures of ice-melting transition of sponge cake. Sponge cakes manufactured with 0.5 gkg-1 PGA addition were in general lighter on crumb color and white index than the control. Scanning electron microscopy showed that sponge cake with the addition of 0.1 and 0.5 gkg-1 PGA exhibited microstructures having …
Design Of S-Band Transition Based On Microstrip Quarter-Wave Transformers,
2010
Syracuse University
Design Of S-Band Transition Based On Microstrip Quarter-Wave Transformers, Bashir Souid, Josh Merchant, Michael Rice, Mahmoud El Sabbagh
Electrical Engineering and Computer Science - All Scholarship
In this technical report, the design of a high-frequency matching circuit is presented. This circuit is a transformer comprising a cascade of multisections of quarter-wavelength transmission lines. The transformer, also referred to as matching circuit, is implemented based on microstrip technology. The matching circuit is required to perform as a transition from a 10-Ω load to a 50-Ω source. Moreover, this transition is specified to have a return loss more than 20 dB over the entire S-band from 2 GHz to 4 GHz. Analytical model developed and verified by full-wave simulation results indicates that the design of a quarter-wavelength transformer …
2d Motion Detection Bounded Hand 3d Trajectory Tracking And Gesture Recognition Under Complex Background,
2010
Zhejiang University
2d Motion Detection Bounded Hand 3d Trajectory Tracking And Gesture Recognition Under Complex Background, Shuangqing Wu, Yin Zhang, Sanyuan Zhang, Xiuzi Ye, Yiyu Cai, Jianmin Zheng, Soumita Ghosh, Wenyu Chen, Jane Zhang
Electrical Engineering
In this paper, a 2D motion detection bounded hand 3D trajectory tracking and gesture recognition system is proposed for virtual reality interactions. First, the Bayes decision rule for classification of background and foreground is utilized to automatically locate the hand that bounded within a rectangle, and then the trajectory of the hand in 3D space is tracked by mean shift particle filter and stereo imaging. The skin color feature is exploited for image matting that effectively segment the hand contour in video sequence automatically. Finally the hand gesture is recognized by the connected component analysis and line approximation.
Real-Time 3d Markerless Multiple Hand Detection And Tracking For Human Computer Interaction Applications,
2010
Nanyang Technological University, Singapore
Real-Time 3d Markerless Multiple Hand Detection And Tracking For Human Computer Interaction Applications, Soumita Ghosh, Jianmin Zheng, Wenyu Chen, Jane Zhang, Yiyu Cai
Electrical Engineering
In this paper we present a purely vision based implementation of markerless hand detection and tracking system which effectively detects and tracks the hand positions irrespective of hand orientation. A shape based detection algorithm using a new line approximation technique followed by an adaptive minimum distance classifier based tracking technique is implemented. The technique is very generic and can be practically used in all types of immersive and semi-immersive environments like simulations, three-dimensional (3D) games, visually assisted medical surgery and other humancomputer interactive applications.
A Linear Combination Of Heuristics Approach To Spatial Sampling Hyperspectral Data For Target Tracking,
2010
Air Force Institute of Technology
A Linear Combination Of Heuristics Approach To Spatial Sampling Hyperspectral Data For Target Tracking, Barry R. Secrest
Theses and Dissertations
Persistent surveillance of the battlespace results in better battlespace awareness which aids in obtaining air superiority, winning battles, and saving friendly lives. Although hyperspectral imagery (HSI) data has proven useful for discriminating targets, it presents many challenges as a useful tool in persistent surveillance. A new sensor under development has the potential of overcoming these challenges and transforming our persistent surveillance capability by providing HSI data for a limited number of pixels and grayscale video for the remainder. The challenge of exploiting this new sensor is determining where the HSI data in the sensor's field of view will be the …
Theory And Applications Of Compressive Sensing,
2010
Electrical and Computer Engineering, Purdue University
Theory And Applications Of Compressive Sensing, Atul Divekar, Okan Ersoy
Department of Electrical and Computer Engineering Technical Reports
This thesis develops algorithms and applications for compressive sensing, a topic in signal processing that allows reconstruction of a signal from a limited number of linear combinations of the signal. New algorithms are described for common remote sensing problems including superresolution and fusion of images. The algorithms show superior results in comparison with conventional methods. We describe a method that uses compressive sensing to reduce the size of image databases used for content based image retrieval. The thesis also describes an improved estimator that enhances the performance of Matching Pursuit type algorithms, several variants of which have been developed for …
Optimization Design Of Electrodes For Anode-Supported Solid Oxide Fuel Cells Via Genetic Algorithm,
2010
University of South Carolina - Columbia
Optimization Design Of Electrodes For Anode-Supported Solid Oxide Fuel Cells Via Genetic Algorithm, Junxiang Shi, Xingjian Xue
Faculty Publications
Porous electrode is the critical component of solid-oxide fuel cells (SOFCs) and provides a functional material backbone for multi-physicochemical processes. Model based electrode designs could significantly improve SOFC performance. This task is usually performed via parameter studies for simple case and assumed property distributions for graded electrodes. When nonlinearly coupled multiparameters of electrodes are considered, it could be very difficult for the model based parameter study method to effectively and systematically search the design space. In this research, the optimization approach with a genetic algorithm is demonstrated for this purpose. An anode-supported proton conducting SOFC integrated with a fuel supply …
Supporting Islanded Microgrid Operations In The Presence Of Intermittent Wind Generation,
2010
Missouri University of Science and Technology
Supporting Islanded Microgrid Operations In The Presence Of Intermittent Wind Generation, Nikhil K. Ardeshna, Badrul H. Chowdhury
Electrical and Computer Engineering Faculty Research & Creative Works
Although microgrids have the potential to solve several sticky problems that beset the present-day grid, indiscriminate application can cause serious problems. Thorough studies are needed on many aspects to identify the potential problems and to develop effective mitigation techniques. Microgrids can operate in parallel with the main grid or as an isolated system to support customers isolated from the grid. during parallel operations, the microgrid supplies only a fraction of the power demand of the grid. However, in islanded operations, the microgrid must continue to supply 100% of power to the customers. Both types of operations are studied to identify …
Study Of Solid State Fault Interruption Device For Medium Voltage Distribution Systems With Distributed Generators,
2010
Missouri University of Science and Technology
Study Of Solid State Fault Interruption Device For Medium Voltage Distribution Systems With Distributed Generators, Mehul K. Madan, Badrul H. Chowdhury
Electrical and Computer Engineering Faculty Research & Creative Works
Solid state fault interruption devices (FID) can interrupt fault currents much faster than the presently available circuit breakers. Due to their current inability to block system level voltages, presently available semiconductor devices are connected in series to increase blocking capability of the fault interrupting device. to verify the ability of the interruption device for use in a medium voltage distribution system, a FID model is subjected to simulated tests for continuous current carrying capability, rated fault current interruption, and lightning impulse withstand tests. a simulation to demonstrate the ability of the FID to interrupt fault currents in a 7.2kV distribution …
