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Full-Text Articles in Electrical and Computer Engineering
Implementation Of A Coal Level Sensing And Control System Comparing Range Sensor Modalities, Ralph Lee Taylor
Implementation Of A Coal Level Sensing And Control System Comparing Range Sensor Modalities, Ralph Lee Taylor
Electrical Engineering Theses
A coal-fired power plant typically has silos, bunkers or stockpiles in which the fuel is placed for storage purposes. Real-time feedback sensors are utilized to sense the coal height so data can be sent to downstream systems for further processing. These systems are required to accurately sense the height of coal within the bunker or stockpile. The range information is then fed in a real-time fashion to a control system. Inaccurate measurements can result in severe environment and safety consequences. The coal-fired power plant application is especially daunting due to the particularly harsh operating conditions and reliability requirements. There are …
Analysis And Improvement Of Multiple Optimal Learning Factors For Feed-Forward Networks, Praveen Jesudhas
Analysis And Improvement Of Multiple Optimal Learning Factors For Feed-Forward Networks, Praveen Jesudhas
Electrical Engineering Theses
The effects of transforming the net function vector in the Multilayer Perceptron (MLP) are analyzed. The use of optimal diagonal transformation matrices on the net function vector is proved to be equivalent to training the MLP using multiple optimal learning factors (MOLF). A method for linearly compressing large ill-conditioned MOLF Hessian matrices into smaller well-conditioned ones is developed. This compression approach is shown to be equivalent to using several hidden units per learning factor. The technique is extended to large networks. In simulations, the proposed algorithm performs almost as well as the Levenberg Marquardt (LM) algorithm with the computational complexity …
A Tutorial On Lte Evolved Utran (Eutran) And Lte Self Organizing Networks (Son), Dhruv Sunil Shah
A Tutorial On Lte Evolved Utran (Eutran) And Lte Self Organizing Networks (Son), Dhruv Sunil Shah
Electrical Engineering Theses
The third-generation (3G) cellular communication technology, Universal Mobile Terrestrial System (UMTS), based on Wideband Code-Division Multiple Access (WCDMA), has been widely deployed all over the world providing faster download speeds for data (packet) communications. To further improve the throughput and overall performance of the cellular communication system established by UMTS, the Third Generation Partnership Project (3GPP) in November 2004 launched an ambitious project called the Long Term Evolution (LTE) of UMTS. This would ensure the continued competitiveness of the UMTS in the future. The technical specifications of the LTE project are formally known as the Evolved UMTS Terrestrial Radio Access …
Convert Uhf Rfid Tag From Passive To Semi-Passive Tag Using External Power Sources, Tanvi Mehta
Convert Uhf Rfid Tag From Passive To Semi-Passive Tag Using External Power Sources, Tanvi Mehta
Electrical Engineering Theses
In this thesis, I present novel circuit designs that convert a passive radio frequency identification (RFID) tag into a semi-passive RFID tag. Passive RFID tags are relatively inexpensive to purchase and to integrate into objects and devices. However, in some environments and on some objects the performance of the pure passive tags is not sufficient for the intended applications. A semi-passive tag, in comparison to a pure passive tag, has significantly greater communication range since the semi-passive tag derives its operational power from an on-tag power source instead of just from an interrogator's communication signal. As a result, semi-passive tags …
Capacitive Strain Sensors For Measurement Of Large Strain For Structural Health Monitoring, Clement Jacob
Capacitive Strain Sensors For Measurement Of Large Strain For Structural Health Monitoring, Clement Jacob
Electrical Engineering Theses
Structural health monitoring (SHM) is increasingly used to replace time based management, with a more efficient Condition Based Maintenance (CBM). The traditional scheme of scheduling down time for aircraft inspection or periodic evaluation of civil infrastructure costs millions of dollars in maintenance due to either downtime or lack of timely maintenance. SHM involves periodic, real time sampling and analysis of signals, from onboard sensors like accelerometer, pressure, strain or acoustic sensors to determine the condition of the structure. This can be used to carry out immediate repairs as well as predict failure. We report the development of a new high …
Tutorial On Network Quality And Ims Services Used In Lte, Ayush Maheshwari
Tutorial On Network Quality And Ims Services Used In Lte, Ayush Maheshwari
Electrical Engineering Theses
3rd Generation or 3G technologies like WCDMA, HSPA and GPRS are very advanced technologies in themselves. They allow data downlink speeds of up to 7Mbps and will soon be offering up to 14Mbps. The number of people using these networks has crossed 70 million users worldwide and with ever increasing users we need to provide a solution to handle the new and improved services which are being designed daily to work on mobile devices. Long Term Evolution (LTE), will be one of the two technologies which will meet the ITU's IMT-Advanced requirements for 4G technologies. 3G Partnership Project (3GPP) is …
A Tutorial On Functionality Of Wimax And It's Performace Evaluation, Amay Dhirendra Umradia
A Tutorial On Functionality Of Wimax And It's Performace Evaluation, Amay Dhirendra Umradia
Electrical Engineering Theses
Recently, there have been tremendous developments on wireless communication technology which have predicted to replace the wirelined system and provide incredible bandwidth to the consumers. The IEEE standard for this technology is known as 802.16e (Mobile WiMAX) which was officially published in the year 2006. WiMAX would provide broadband access to rural and developing countries where the option of DSL, cable and Wi-Fi is unavailable. This Thesis provides a tutorial overview of 802.16. The information for this article is gathered from The Institute of Electrical and Electronics Engineers (IEEE) website, the WiMAX forum website and other resources on the internet. …
An Ultra Wide Band Cmos Low Noise Amplifier Design, Nahusha Bhadravati Mohankumar
An Ultra Wide Band Cmos Low Noise Amplifier Design, Nahusha Bhadravati Mohankumar
Electrical Engineering Theses
An RF ultra wide band low noise amplifier designed for the frequency range of 12-18 GHz of operation is presented in this paper. The low noise amplifier is designed using the state-of-the-art complementary metal oxide semiconductor 45 nm technology. Berkeley's Predictive Technology Model (PTM) is used to generate a fairly accurate mathematical model and the SPICE data is implemented into the BSIM 4 version of the Advanced Design Systems (ADS) program. The low noise design strategy is mainly based on the analysis of high frequency CMOS operation. This LNA has two stages: the first stage is a RL feedback amplifier …
A High Fill Factor Cmos Image Sensor For Ir Camera Applications, Daniel Mcbride
A High Fill Factor Cmos Image Sensor For Ir Camera Applications, Daniel Mcbride
Electrical Engineering Theses
In this thesis, a unit cell for high-SNR applications is presented. The proposed circuit is significantly smaller than other circuits that perform dark current subtraction because less circuitry is used inside the unit cell. The proposed circuit uses only two transistors and one resistor inside each unit cell to suppress the dark current. The size of the circuit in the layout is 25 um x 25 µm. With this new unit cell and routing approach, the size of the unit cell was reduced by 300% compared to other circuits which also suppress dark current.
Complexity Reduction For Vp6 To H.264 Transcoder Using Motion Vector Reuse, Jay R. Padia
Complexity Reduction For Vp6 To H.264 Transcoder Using Motion Vector Reuse, Jay R. Padia
Electrical Engineering Theses
VP6 is a video coding standard developed by On2 Technologies, Inc. It is the preferred codec for Macromedia Flash 8 video. VP6 gained importance with Macromedia Flash emerging as a widely adopted video streaming technology over the internet. H.264 is currently one of the most widely accepted video coding standards in the industry. It enables high quality video at low bitrates. Adobe adopted H.264 for its Flash video in August 2007. Adobe looks at adoption of H.264 as a major step towards enabling high quality video on the web. Hence there is increasing importance of techniques which can convert video …
Alternative Matching Schemes For Automatic Fingerprint Identification Systems, Michael Jason Futer
Alternative Matching Schemes For Automatic Fingerprint Identification Systems, Michael Jason Futer
Electrical Engineering Theses
Biometrics is a recognition technology that uses the unique behavioral and physiological traits of the human body as identifiers. The fingerprint is one of the oldest and most widely used forms of biometric identifiers. In this thesis, an automatic fingerprint identification system designed by a previous Electrical Engineering graduate student at The University of Texas at Arlington is upgraded with the purpose of improving matching accuracy. A review of the baseline automatic fingerprint identification system is provided as a reference point for improvements in the system. Then, improvements to the image enhancement stage of the baseline system are discussed. They …
Implementation And Performance Analysis Of 2-D Order 16 Integer Transforms In H.264/Avc And Avs-Video For High Definition Video Coding, Madhu Peringassery Krishnan
Implementation And Performance Analysis Of 2-D Order 16 Integer Transforms In H.264/Avc And Avs-Video For High Definition Video Coding, Madhu Peringassery Krishnan
Electrical Engineering Theses
H.264/AVC and AVS-video are two video coding standards that have a wide range of applications ranging from high-end professional camera and editing systems to low-end mobile applications. They strive to achieve maximum compression efficiency without compromising the quality of video. To this end many coding tools are defined in them. Transform coding is one among them. Transform coding represents the signal/image (that is currently in time/spatial domain) in another domain (transform domain), where most of the energy in signal/image is concentrated in a fewer number of coefficients. Thus the insignificant coefficients can be discarded after transform coding to achieve compression. …
Mems Piezoresistive Pressure Sensor On Flexible Substrates Using Nichrome And Cnt/Polyimide Nanocomposites Piezoresistors, Gaviraj Nadvi
Mems Piezoresistive Pressure Sensor On Flexible Substrates Using Nichrome And Cnt/Polyimide Nanocomposites Piezoresistors, Gaviraj Nadvi
Electrical Engineering Theses
Micro pressure sensors using nichrome as piezoresistor were fabricated on silicon and flexible substrates. The pressure sensors on flexible substrate can be used for prosthetic skin applications. The devices were successfully tested using different methods.Micromachined pressure/force sensors using nickel chromium piezoresistors have been investigated experimentally and through finite element mesh analysis. The pressure/force sensors were designed using a suspended aluminum oxide membrane with optimally placed piezoresistors to measure the strain in the membrane when deflected with an applied force or pressure. Different devices, each with varying size and shape of both the membrane and the piezoresistors were designed, fabricated, and …
Improved Classification In Flat Networks, Madhu Gannapal
Improved Classification In Flat Networks, Madhu Gannapal
Electrical Engineering Theses
It is shown that optimal flat networks can be found as solutions to least squares problems. An algorithm is presented to improve existing classifier training methods by changing the desired outputs. The algorithm is based on minimum probability of error. The algorithm's performance is compared with those of other algorithms including the Bayes Gaussian classifier. The Convergence of training and the effects of outliers are analyzed in all the algorithms presented here.
Develpoment Of An Electronically Controlled Cold Plasma Reformer For Hydrogen Harvest From Bio-Fuels, Job Brunet
Develpoment Of An Electronically Controlled Cold Plasma Reformer For Hydrogen Harvest From Bio-Fuels, Job Brunet
Electrical Engineering Theses
The energy demand on the world market due to the limited resources has forced governments and scientists to find an alternative source of fuel to ease the burden on its populous and environment. Moreover, the rate of global warming is increasing with the rate of carbon dioxide released from emissions from coal burning power plants and also from vehicle exhaust. This trend of burn now and fix later has to end and a new source of fuel must be developed. Wind, solar, and even nuclear are great substitutes for reducing the global pollution but a new tangible fuel is required. …
A Comparison Method To Evaluate Motion Splicing Techniques, George Thekkanath Raphael
A Comparison Method To Evaluate Motion Splicing Techniques, George Thekkanath Raphael
Electrical Engineering Theses
The development of methods for the re-use and modification of motion data is an activearea of research. Among these methods, we find automatic techniques to generate a spliced motion by combining different actions recorded in separate sessions. Motion splicing allows capturing motion independently and later combining them to create a new natural looking motion. Even though there have been a lot of research on motion editing techniques, less focus has been given to evaluate these edited motions. In this thesis, we present a novel methodology to quantitatively evaluate the synthesized motion generated by different motion editing techniques. We implemented three …
Low Complexity H.264 To Vc-1 Transcoder, Vidhya Vijayakumar
Low Complexity H.264 To Vc-1 Transcoder, Vidhya Vijayakumar
Electrical Engineering Theses
The high definition video adoption has been growing rapidly for the last five years. The H.264 and VC-1 coding standards are two of the recent and dominant coding standards. Compared to H.264, VC-1 is less complex but capable of achieving the same visual quality as H.264. Hence there is increasing importance of techniques which can convert video from H.264 to VC-1 and thereby enable mobile devices to work with less complex codecs. While there has been recent work on VC-1 to H.264 transcoding, the published work on H.264 to VC-1 transcoding is nearly non-existent. This has created the motivation to …
Predition Of Torque And Radial Forces In Permanent Magnet Synchronous Machines Using Field Reconstruction Method, Banharn Sutthiphornsombat
Predition Of Torque And Radial Forces In Permanent Magnet Synchronous Machines Using Field Reconstruction Method, Banharn Sutthiphornsombat
Electrical Engineering Theses
Due to their high torque-to-loss ratio, permanent magnet synchronous machines (PMSM) have received increasing attention in automotive applications over the past decade. Because of this unique characteristics, many applications have utilized PMSM. In addition to high efficiency, quiet operation of the machines is desirable in automotive, naval and military applications. In order to operate at high efficiency quietly, the torque pulsation or torque ripple needs to be monitored and mitigated accurately. Magnitude of the torque ripple is influenced by the magnetic design (cogging torque) and excitation, and the pattern of ripple is affected by the machine's geometry (stator slots).Field reconstruction …
Optimal Output Gain Algorithm For Feed-Forward Network Training, Babu Hemanth Kumar Aswathappa
Optimal Output Gain Algorithm For Feed-Forward Network Training, Babu Hemanth Kumar Aswathappa
Electrical Engineering Theses
A batch training algorithm for feed-forward networks is proposed which uses Newton's method to estimate a vector of optimal scaling factors for output errors in the network. Using this vector, backpropagation is used to modify weights feeding into the hidden units. Linear equations are then solved for the network's output weights. Elements of the new method's Gauss-Newton Hessian matrix are shown to be weighted sums of elements from the total network's Hessian. The effect of output transformation on training a feed-forward network is reviewed and explained, using the concept of equivalent networks. In several examples, the new method performs better …
Detection And Severity Classification Of Rotor Imbalance Faults In Induction Machines, Himanshu Jain
Detection And Severity Classification Of Rotor Imbalance Faults In Induction Machines, Himanshu Jain
Electrical Engineering Theses
As world economy continues to globalize, increased competition has lead to a reduction in profit margins. To remain competitive in such an economy, an industry needs to reduce the downtime of critical components even for maintenance purposes. However, this should not jeopardize the genuine maintenance needs of the equipments. In other words, an optimized maintenance strategy is needed, in which maintenance is performed only when a need for it arises; unlike the currently popular periodic maintenance. Condition based Maintenance (CBM) is one such strategy. Induction machines are work horse of an industry. Their criticality to industry may be gauged by …
Low Complexity H.264 Encoder Using Machine Learning., Thejaswini Purushotham
Low Complexity H.264 Encoder Using Machine Learning., Thejaswini Purushotham
Electrical Engineering Theses
H.264 is currently one of the most widely accepted video coding standards in the industry. Several software and hardware solutions for the H.264 video encoder exist in the market at present. H.264 is used in such applications as Blu-ray Disc, videos on the internet, digital video broadcast, direct-broadcast satellite television service, cable television services, and real-time videoconferencing. This thesis uses the WEKA (Waikato Environment for Knowledge Analysis) tool to generate the classification rule. WEKA is detailed in Chapter 3. The input attributes to the WEKA have been calculated from the video sequence to be encoded. The procedure has been elaborated …
Physics Behind Rfid Smart Card Security In Context Of Privacy, Kirti Chopra
Physics Behind Rfid Smart Card Security In Context Of Privacy, Kirti Chopra
Electrical Engineering Theses
In this thesis I prove that existing HF protocol is not secure. Lack of security in turn leads to violation of privacy.The unique ID on the HF RFID smart card can be sniffed by any eavesdropper. Not only eavesdropping, but cloning of the card is another significant problem that poses a privacy threat. An attacker can skim the information on a proximity card and clone it to use for his malicious purposes.RFID smart cards are now widely being used in credit cards,access system, transit system and many more such application. Tampering or malicious usage of data on aforementioned cards raises …
A Planar Cavity Backed Slot Antenna Array For Ultra-Wideband Monopulse Radars, Vinay Magadi Vikram
A Planar Cavity Backed Slot Antenna Array For Ultra-Wideband Monopulse Radars, Vinay Magadi Vikram
Electrical Engineering Theses
In this thesis, a wideband cavity backed slot antenna is designed for automotive-borne monopulse radar applications. A rectangular slot is used to realize broad bandwidth; the slot is backed by a cavity and vertical walls of the cavity are implemented by discrete vias; and the slot is fed by an inverted microstrip line. The antenna in this letter is compact, robust, fully planar, and easy to integrate. A two-element array is fabricated and tested. Measured input impedance is matched to 50-ohm within band [2.61 GHz, 3.44 GHz] (27.5% bandwidth); and monopulse beam-scanning is successfully demonstrated.
Dispersion Engineering With Leaky-Mode Resonance Structures, Xin Wang
Dispersion Engineering With Leaky-Mode Resonance Structures, Xin Wang
Electrical Engineering Theses
In the thesis, a numerical method for the analysis of optical pulses propagation through leaky-mode/guided-mode resonance (GMR) structures is implemented by integrating a Fourier decomposition technique and the rigorous coupled-wave analysis (RCWA) method. Dispersion properties of several GMR structures such as single-grating-layer GMR filters, coupled GMR filters, and cascaded GMR filters are studied and their interaction with optical pulses investigated. For device applications, a high-Q transmission filter is formed by coupling GMR reflection filters which can withstand typical attenuation in silicon. Wavelength division multiplexing (WDM) filters are proposed by cascading a number of GMR transmission filters. Generally, a N channel …
Optimization Of Phev Charging Station, Feiran Huang
Optimization Of Phev Charging Station, Feiran Huang
Electrical Engineering Theses
Plug-in hybrid vehicles are the most feasible approach towards significantly lowering the consumption of oil and improve fuel economy with today's existing technology. In Electric Power Research Institute and the Natural Resources Defense Council (EPRI-NRDC) 2007 study already proved that PHEVs will reduce emissions if they are broadly adopted. However, the charging infrastructures/station become key factor in the success of prevail of PHEVs.The research of this paper is focusing the operation of the PHEV charging station with battery storage units. The battery units conserve the low price clean energy and discharge when demanded. The on-site installed photovoltaic (PV) and off-site …
Real Time Location Tool For Precision Tracking Of Passive Uhf Rfid Tags In Two Dimensions, Nasir Kenarangui
Real Time Location Tool For Precision Tracking Of Passive Uhf Rfid Tags In Two Dimensions, Nasir Kenarangui
Electrical Engineering Theses
This thesis addresses this problem of a precise RTLS (Real Time Location System) by implementing a Passive UHF RFID system. A software is created that connects to an RFID reader and accesses it's functionality to collect the tag's backscatter power which is the RSSI (Received Signal Strength Indicator), and the tag's ID. The software also connects with a web camera, and locates the tags within the camera's point of view by using only the RSSI of the tag. This software is capable of computing the locations of tags by locking on each tag's unique EPC, and marking their location and …
Tutorial On Functionality And Performance Of Uu Link (Air Interface) Of Lte System, Prashant Srivastava
Tutorial On Functionality And Performance Of Uu Link (Air Interface) Of Lte System, Prashant Srivastava
Electrical Engineering Theses
In this thesis we have discussed about the air interface for LTE. We have shown the extensive details of the two different types of access that is downlink access- Orthogonal frequency multiple access (OFDMA) and uplink access- Single carrier frequency division multiple access (SC-FDMA).We started with basic concepts about these techniques and proceeded ahead by discussing the operation and design of both types of methods. Also we have shown the transmission chain for downlink and uplink showing step by step that how the data and control information are transmitted over air in LTE. We have presented a brief overview of …
A Tutorial On The Functionality On Core Network Mobility, Jatinder Jasbir Singh
A Tutorial On The Functionality On Core Network Mobility, Jatinder Jasbir Singh
Electrical Engineering Theses
Long Term Evolution (LTE) is next generation Mobile Broadband Technology, which promises to offer significantly higher data rates, better quality, and more economical. Many of the service providers are planning to offer this service by 2010-2012. LTE is vast change in the telecommunication industry from circuit switched network to packet switched network and now all IP-network. In the fast changing mobile telecommunications seamless handover is important for any technology to succeed. It is desirable and beneficial from operator as well as user perspective to have seamless handover with cost effectiveness, enhanced features, and location independence not only in the case …
High Detectivity Pyroelectric Infrared Detector, Annand Balasubramaniyam
High Detectivity Pyroelectric Infrared Detector, Annand Balasubramaniyam
Electrical Engineering Theses
The sensors which measure physical quantities by sensing them as thermal quantities and then converting the thermal signals into electrical signals are called thermal sensors. One such type of thermal sensor is a pyroelectric infrared sensor. Thermal sensors are not popular mainly because they are slow devices, and they have low sensitivity when compared to photon detectors. One major advantage of thermal detectors over photon detectors is that they can operate at room temperature. This is one of the main motivations for this research. The aim of the thesis is to design an uncooled, high detectivity pyroelectric infrared detector. The …
H.264 Standard Based Side Information Generation In Wyner-Ziv Coding, Subrahmanya Maira Venkatrav
H.264 Standard Based Side Information Generation In Wyner-Ziv Coding, Subrahmanya Maira Venkatrav
Electrical Engineering Theses
The traditional video coding involves a high complexity encoder and relatively low complexity decoder. The complexity of the encoder is mainly due to motion estimation [3] and other prediction techniques employed . There is a new paradigm emerging in video coding - Distributed video coding (DVC). This is based on Slepian-Wolf and Wyner-Ziv6 theorems. In Wyner-Ziv video coding, encoder is less complex compared to the decoder. The decoder is very complex due to prediction involved for side information (SI) generation. There is lot of research done previously on linear density parity check codes (LDPC) and H.263 standard based SI generation …