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Full-Text Articles in Engineering
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
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, Soumita Ghosh, Jianmin Zheng, Wenyu Chen, Jane Zhang, Yiyu Cai
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.
On The Solution Of A Class Of Large Body Problems With Full Or Partial Circular Symmetry By Using The Finite-Difference Time-Domain (Fdtd) Method, Wenhua Yu, Dean Arakaki, Raj Mittra
On The Solution Of A Class Of Large Body Problems With Full Or Partial Circular Symmetry By Using The Finite-Difference Time-Domain (Fdtd) Method, Wenhua Yu, Dean Arakaki, Raj Mittra
Electrical Engineering
This paper presents an efficient method to accurately solve large body scattering problems with partial circular symmetry. The method effectively reduces the computational domain from three to two dimensions by using the reciprocity theorem. It does so by dividing the problem into two parts: a larger 3-D region with circular symmetry, and a smaller 2-D region without circular symmetry. An finite-difference time-domain (FDTD) algorithm is used to analyze the circularly symmetric 3-D case, while a method of moments (MoM) code is employed for the nonsymmetric part of the structure. The results of these simulations are combined via the reciprocity theorem …
A New Multiphase Multi-Interleaving Buck Converter With Bypass Lc, Taufik, Randyco Prasetyo, Dale Dolan, Dodi Garinto
A New Multiphase Multi-Interleaving Buck Converter With Bypass Lc, Taufik, Randyco Prasetyo, Dale Dolan, Dodi Garinto
Electrical Engineering
As the number of transistors in microprocessors increases, their power demand increases accordingly. This poses design challenges for their power supply module called VRM (Voltage Regulator Module) especially when operated at sub voltage range. This paper presents the design of a new multiphase multi-interleaving topology that addresses these challenges. A lab scaled hardware prototype of the new topology shows improved load regulation, output voltage ripple and dynamic response time compared to a commercially available power supply module.
A New Ac-Dc Converter Using Bridgeless Sepic, M. R. Sahid, A. H. M. Yatim, Taufik
A New Ac-Dc Converter Using Bridgeless Sepic, M. R. Sahid, A. H. M. Yatim, Taufik
Electrical Engineering
A new bridgeless power factor correction circuit (PFC) based on single ended primary inductance converter (SEPIC) is proposed. The number of component conducted at each subinterval mode is reduced compared to the existing topologies. Analysis of the converter operated in discontinuous-conduction mode (DCM) is discussed. Experimental circuit for the proposed converter is developed with universal input voltage capability for 50V DC output voltage connected to 100W load. The simulation and experimental results are presented to show the performances of the proposed circuit.
Improved Rf Power Extraction From 1.55Μm Ge/Si N-I-P Photodiodes With Load Impedance Optimization, Andrew L. Huard, Molly Piels, Anand Ramaswamy, John E. Bowers, Dennis J. Derickson
Improved Rf Power Extraction From 1.55Μm Ge/Si N-I-P Photodiodes With Load Impedance Optimization, Andrew L. Huard, Molly Piels, Anand Ramaswamy, John E. Bowers, Dennis J. Derickson
Electrical Engineering
The RF output power of Ge/Si n-i-p waveguide photodetectors is improved by increasing the load impedance. The maximum extracted RF power at 3GHz is 17.13dBm with a compression current of 42mA using a 100Ὠ load.
Application Of Differential Evolution To Determine The Hepwm Angles Of A Three Phase Voltage Source Inverter, N Bahari, Z. Salam, Taufik
Application Of Differential Evolution To Determine The Hepwm Angles Of A Three Phase Voltage Source Inverter, N Bahari, Z. Salam, Taufik
Electrical Engineering
This paper presents an efficient Differential Evolution (DE) based solution for harmonic elimination pulse-width modulation (HEPWM). The aim is to solve for the set of transcendental equations that determine the switching angles of the HEPWM waveform. The objective function of the DE is designed to minimize (to near zero) the selected harmonics and at the same time allows for the fundamental component of the output voltage to be controlled independently. To verify the method, simulation is carried out using MATLAB simulink. The computed switching angles are applied to a three phase voltage source inverter. Typical results are shown and discussed.
Analysis And Simulations Of Z-Source Inverter Control Methods, B. Y. Husodo, M. Anwari, S. M. Ayob, Taufik
Analysis And Simulations Of Z-Source Inverter Control Methods, B. Y. Husodo, M. Anwari, S. M. Ayob, Taufik
Electrical Engineering
In this paper, two different control methods for Z-source inverter are examined. The Simple Boost and the Maximum Boost control methods of the inverter are analyzed and compared each other using simulation with MATLAB/Simulink. The Simple Boost control with independence relation between modulation index and shoot-through duty ratio is also simulated and analyzed. The selection of high modulation index and shoot-through duty ratio can reduce the inverter’s dc link voltage overshoot and increasing power delivery capacity of the inverter.
Study Of Top And Bottom Photonic Gratings On Gan Led With Error Grating Models, Simeon S. Trieu, Xiaomin Jin
Study Of Top And Bottom Photonic Gratings On Gan Led With Error Grating Models, Simeon S. Trieu, Xiaomin Jin
Electrical Engineering
The gallium nitride (GaN) light-emitting-diode (LED) top-bottom (or transmission-reflection) grating simulation results with error grating model are presented. The microstructure GaN bottom hole and top pillar gratings are calculated and compared with the non-grating (flat) case. Grating shapes simulated are either conical or cylindrical. A direct comparison of 181 different combined transmission-reflection grating cases using the finite difference time domain method is presented. The simulation results show that simple or direct combinations of the optimized top grating with the optimized bottom grating only produce a 42% light extraction improvement compared to the non-grating case, which is much lower than that …
R&D Of A Dual Mode Acoustic Modem Testbed For Shallow Water Channels, Feng Tong, Shengyong Zhou, Bridget Benson, Ryan Kastner
R&D Of A Dual Mode Acoustic Modem Testbed For Shallow Water Channels, Feng Tong, Shengyong Zhou, Bridget Benson, Ryan Kastner
Electrical Engineering
Recent years witnessed an increasing requirement of marine missions like oceanographic investigation, environmental monitoring, underwater structure inspection and sea bottom resource exploitation, which urged the R&D of high performance underwater acoustic (UWA) modems. However, as underwater acoustic channels pose multiple difficulties such as multipath, time-space selectivity, frequency dependent noise, and Doppler shifts on transmission, currently there is not a single modulation strategy that can provide high data rate, energy efficiency and channel robustness simultaneously. Enlightened by the similar dual mode (DM) systems developed in wireless channels, this paper presents the R&D of a DM UWA modem testbed system, which enables …
Design Of A Low-Cost Underwater Acoustic Modem, Bridget Benson, Ying Li, Brian Faunce, Kenneth Domond, Don Kimball, Curt Schurgers, Ryan Kastner
Design Of A Low-Cost Underwater Acoustic Modem, Bridget Benson, Ying Li, Brian Faunce, Kenneth Domond, Don Kimball, Curt Schurgers, Ryan Kastner
Electrical Engineering
There has been an increasing interest in creating short-range, low data rate, underwater wireless sensor networks for scientific marine exploration and monitoring. However, the lack of an inexpensive, underwater acoustic modem is preventing the proliferation of these sensor networks. Thus, we are building an underwater acoustic modem starting with the most critical component from a cost perspective-the transducer. The design substitutes a commercial transducer with a homemade transducer using cheap piezoceramic material and builds the rest of the modem's components around the properties of the transducer to extract as much performance as possible. This letter describes the high level design, …
Ant Colony Optimization Algorithm For Robot Path Planning, Michael Brand, Michael Masuda, Nicole Wehner, Xiao-Hua Yu
Ant Colony Optimization Algorithm For Robot Path Planning, Michael Brand, Michael Masuda, Nicole Wehner, Xiao-Hua Yu
Electrical Engineering
Path planning is an essential task for the navigation and motion control of autonomous robot manipulators. This NP-complete problem is difficult to solve, especially in a dynamic environment where the optimal path needs to be rerouted in real-time when a new obstacle appears. The ACO (Ant Colony Optimization) algorithm is an optimization technique based on swarm intelligence. This paper investigates the application of ACO to robot path planning in a dynamic environment. Two different pheromone re-initialization schemes are compared and computer simulation results are presented.
Bioinformatics Data Mining Using Artificial Immune Systems And Neural Networks, Shane Dixon, Xiao-Hua Yu
Bioinformatics Data Mining Using Artificial Immune Systems And Neural Networks, Shane Dixon, Xiao-Hua Yu
Electrical Engineering
Bioinformatics is a data-intensive field of research and development. The purpose of bioinformatics data mining is to discover the relationships and patterns in large databases to provide useful information for biomedical analysis and diagnosis. In this research, algorithms based on artificial immune systems (AIS) and artificial neural networks (ANN) are employed for bioinformatics data mining. Three different variations of the real-valued negative selection algorithm and a multi-layer feedforward neural network model are discussed, tested and compared via computer simulations. It is shown that the ANN model yields the best overall result while the AIS algorithm is advantageous when only the …
Channel Equalization Based On Data Reuse Lms Algorithm For Shallow Water Acoustic Communication, Feng Tong, Bridget Benson, Ying Li, Ryan Kastner
Channel Equalization Based On Data Reuse Lms Algorithm For Shallow Water Acoustic Communication, Feng Tong, Bridget Benson, Ying Li, Ryan Kastner
Electrical Engineering
In recent years, there has been increasing interest in the design of underwater acoustic modems for marine environmental monitoring, underwater structure inspection and sea bottom resource exploitation. As underwater acoustic channels pose difficulties such as multipath, time-space selectivity, frequency dependent noise, and Doppler shifts on transmission, research on adaptive equalizers play an important role in the design of underwater modems. This paper presents a data reuse least mean square (DR-LMS) algorithm to achieve equalization performance with low computational complexity to facilitate a practical hardware implementation. Experimental results obtained in physical shallow water channels demonstrate the effectiveness of the proposed method …
Hardware Implementation Of Symbol Synchronization For Underwater Fsk, Ying Li, Xing Zhang, Bridget Benson, Ryan Kastner
Hardware Implementation Of Symbol Synchronization For Underwater Fsk, Ying Li, Xing Zhang, Bridget Benson, Ryan Kastner
Electrical Engineering
Symbol synchronization is a critical component in the design of an underwater acoustic modem. Without accurate symbol synchronization, higher bit error rates incur thus reducing the reliability and quality of service of the wireless network. This paper provides a practical description of the design choices and hardware implementation details required to build a compact and efficient symbol synchronizer suitable for a short-range, low-power underwater FSK acoustic modem. Experimental results show the design meets the timing requirements of the underwater modem and provides accurate synchronization while consuming only 0.240W power in a Spartan3 xc3s2000 FPGA.
Design Of A Low-Cost, Underwater Acoustic Modem For Short-Range Sensor Networks, Bridget Benson, Y. Li., R. Kastner, B. Faunce, K. Domond, D. Kimball, C. Schurgers
Design Of A Low-Cost, Underwater Acoustic Modem For Short-Range Sensor Networks, Bridget Benson, Y. Li., R. Kastner, B. Faunce, K. Domond, D. Kimball, C. Schurgers
Electrical Engineering
A fundamental impediment to the use of dense underwater sensor networks is an inexpensive acoustic modem. Commercial underwater modems that do exist were designed for sparse, long range, applications rather than for small, dense, sensor nets. Thus, we are building an underwater acoustic modem starting with the most critical component from a cost perspective - the transducer. The design substitutes a commercial transducer with a homemade transducer using cheap piezoceramic material and builds the rest of the modem's components around the properties of the transducer to extract as much performance as possible. This paper presents the design considerations, implementation details, …
Simulation Of Three-Fold Symmetric Photonic Crystal Structures On Top Of Gan Leds, Simeon Trieu, Xiaomin Jin, Chang Xiong, Xingxing Fu, Xiangning Kang, Guoyi Zhang, Bei Zhang
Simulation Of Three-Fold Symmetric Photonic Crystal Structures On Top Of Gan Leds, Simeon Trieu, Xiaomin Jin, Chang Xiong, Xingxing Fu, Xiangning Kang, Guoyi Zhang, Bei Zhang
Electrical Engineering
A 3-fold symmetric photonic-crystal grating is simulated using improved FDTD-model. Transmission gratings are optimized. Then, the best cases are simulated in GaN-LED models. The maximum extraction efficiency improvement is 40× greater compared to conventional LEDs.
Increased Performance Of Fpga- Based Color Classification System, Junguk Cho, Bridget Benson, Sunsern Cheamanukul, Ryan Kastner
Increased Performance Of Fpga- Based Color Classification System, Junguk Cho, Bridget Benson, Sunsern Cheamanukul, Ryan Kastner
Electrical Engineering
This paper presents a hardware architecture for increased performance of color classification. In our architecture, color classification, based on an AdaBoost algorithm, identifies a pixel as having the color of interest or not. We designed the proposed architecture using Verilog HDL and implemented the design in a Xilinx Virtex-5 FPGA. The architecture for color classification can have 598 times performance improvement over an equivalent software solution and 1.9 times performance improvement over the leading hardware color classifier.
Teaching Sustainability Analysis In Electrical Engineering Lab Courses, David Braun
Teaching Sustainability Analysis In Electrical Engineering Lab Courses, David Braun
Electrical Engineering
Laboratory courses represent an incompletely tapped opportunity to teach sustainability concepts. This work introduces and evaluates a simple strategy used to teach sustainability concepts in electrical engineering laboratory courses. The technique would readily adapt to other disciplines. The paper presents assessment data and a wiki containing student sustainability analyses.
Multiphase Interleaving Buck Converter With Input-Output Bypass Capacitor, Taufik, Randyco Prasetyo, Arief Hernadi, Dodi Garinto
Multiphase Interleaving Buck Converter With Input-Output Bypass Capacitor, Taufik, Randyco Prasetyo, Arief Hernadi, Dodi Garinto
Electrical Engineering
As the number of transistors in microprocessors increases per Moore's Law their power requirement increases accordingly. This poses design challenges for their power supply module especially when microprocessors operate at sub voltage range. This paper presents a new multiphase topology that addresses these challenges. Laboratory tests on a hardware prototype of the topology shows improved performance compared to a commercially available power supply module.
Gusto: An Automatic Generation And Optimization Tool For Matrix Inversion Architectures, Ali Irturk, Bridget Benson, Shahnam Mirzaei, Ryan Kastner
Gusto: An Automatic Generation And Optimization Tool For Matrix Inversion Architectures, Ali Irturk, Bridget Benson, Shahnam Mirzaei, Ryan Kastner
Electrical Engineering
Matrix inversion is a common function found in many algorithms used in wireless communication systems. As FPGAs become an increasingly attractive platform for wireless communication, it is important to understand the trade-offs in designing a matrix inversion core on an FPGA. This article describes a matrix inversion core generator tool, GUSTO, that we developed to ease the design space exploration across different matrix inversion architectures. GUSTO is the first tool of its kind to provide automatic generation of a variety of general-purpose matrix inversion architectures with different parameterization options. GUSTO also provides an optimized applicationspecific architecture with an average of …
High-Speed Concatenation Of Frequency Ramps Using Sampled Grating Distributed Bragg Reflector Laser Diode Sources For Oct Resolution Enhancement, Brandon George, Dennis J. Derickson
High-Speed Concatenation Of Frequency Ramps Using Sampled Grating Distributed Bragg Reflector Laser Diode Sources For Oct Resolution Enhancement, Brandon George, Dennis J. Derickson
Electrical Engineering
Brandon George and Dennis Derickson California Polytechnic State Univ. (USA) Wavelength tunable sampled grating distributed Bragg reflector (SG-DBR) lasers used for telecommunications applications have previously demonstrated the ability for linear frequency ramps covering the entire tuning range of the laser at 100 kHz repetition rates1. An individual SG-DBR laser has a typical tuning range of 50 nm. The InGaAs/InP material system often used with SG-DBR lasers allows for design variations that cover the 1250 to 1650 nm wavelength range. This paper addresses the possibility of concatenating the outputs of tunable SGDBR lasers covering adjacent wavelength ranges for enhancing the resolution …
Facility Power Usage Modeling And Short Term Prediction With Artificial Neural Networks, Sunny Wan, Xiao-Hua Yu
Facility Power Usage Modeling And Short Term Prediction With Artificial Neural Networks, Sunny Wan, Xiao-Hua Yu
Electrical Engineering
Residential and commercial buildings accounted for about 68% of the total U.S. electricity consumption in 2002. Improving the energy efficiency of buildings can save energy, reduce cost, and protect the global environment. In this research, artificial neural network is employed to model and predict the facility power usage of campus buildings. The prediction is based on the building power usage history and weather conditions such as temperature, humidity, wind speed, etc. Different neural network configurations are discussed; satisfactory computer simulation results are obtained and presented.