Electrical and Computer Engineering Commons^™

Positive Control With Maximum Stability Radius For Continuous-Time Dynamic Systems, Amirreza Oghbaee

Electrical and Computer Engineering Master's Theses

Positive systems have attracted much attention nowadays due to their numerous applications in modeling and control of physical, biological and economical systems. The state trajectory of such system remains in the nonnegative quadrant of the state space for any given nonnegative initial condition. This class of systems have nice stability and robustness properties. One can take advantage of these interesting properties to robustly stabilize general dynamic systems such that the closed-loop system becomes positive. One of the most important measures in robust control analysis is stability radius. This measure provides the amount of uncertainty that system can cope with before ...

Automatic Registration Of Fused Lidar/Digital Imagery (Texel Images) For Three-Dimensional Image Creation, Scott E. Budge, Neeraj S. Badamikar, Xuan Xie

ECE Faculty Publications

Several photogrammetry-based methods have been proposed that the derive three-dimensional (3-D) information from digital images from different perspectives, and lidar-based methods have been proposed that merge lidar point clouds and texture the merged point clouds with digital imagery. Image registration alone has difficulty with smooth regions with low contrast, whereas point cloud merging alone has difficulty with outliers and a lack of proper convergence in the merging process. This paper presents a method to create 3-D images that uses the unique properties of texel images (pixel-fused lidar and digital imagery) to improve the quality and robustness of fused 3-D images ...

Analysis And Characterization Of Finite-Size Curved Frequency Selective Surfaces, Francesco Mattiello, Giovanni Leone, Giuseppe Ruvio

Articles

Frequency Selective Surfaces (FSSs) are spatial filters that are largely employed in radomes for radars and antennas where high performance is necessary. FSS can be categorised in terms of their frequency behaviour. Band-pass FSS structures are able to let the electromagnetic wave pass in certain frequency ranges and shield others, which are especially suitable for out-of-band stealth of radomes. The properties of frequency selectiveness of these screens are used at microwave and infrared wavelengths. By tuning the electrical size and geometry of the unit-cell (patch or aperture) different frequency behaviours of the structure are generated. Although their analysis and simulation ...

Electronic Desalting For Controlling The Ionic Environment In Droplet-Based Biosensing Platforms, Vikhram Vilasur Swaminathan, Piyush Dak, Bobby Reddy Jr, Eric Salm, Carlos Duarte-Guevara, Yu Zhong, Andrew Fischer, Yi-Shao Liu, Rashid Bashir

Birck and NCN Publications

The ability to control the ionic environment in saline waters and aqueous electrolytes is useful for desalination as well as electronic biosensing. We demonstrate a method of electronic desalting at micro-scale through on-chip micro electrodes. We show that, while desalting is limited in bulk solutions with unlimited availability of salts, significant desalting of ≥1 mM solutions can be achieved in sub-nanoliter volume droplets with diameters of ∼250 μm. Within these droplets, by using platinum-black microelectrodes and electrochemical surface treatments, we can enhance the electrode surface area to achieve >99% and 41% salt removal in 1 mM and 10 mM salt ...

Sensorless Passivity Based Control Of A Dc Motor, Innovative Research Publications Irp India, Seethamathavi M., Vignesh T.

Innovative Research Publications IRP India

In last couple of decades, the control of motors has increased drastically. With this increase, current control techniques are developed. In sensor-less passivity control of a DC Motor the term passivity means the property of stability in an input and output. To maintain the stability at the input side the solar pv panel is connected with MPPT which extract maximum and stable voltage. For output we simultaneously regulate, both, the output voltage of the SEPIC-converter to a value larger than the solar panel output voltage, and the speed of motor, in any of the turning senses, so that it tracks ...

Variable Angle Of Srg For Wind Energy Control Application, Innovative Research Publications Irp India, Maged N. F. Nashed

Innovative Research Publications IRP India

Switched reluctance machine has various desirable features, which comes from its simple construction. They are the wide speed range, high temperature operation and small moment of inertia. There are many control variables, such as: firing angles, reference current, speed and voltage. This paper presents a nonlinear model of 6/4 Switched Reluctance Generator (SRG) with two converter (one with generator side and other with grid side) based on wind Energy system. This system provides a new approach to maximize the amount of power generated. Closed loop control with based PI current Control model is used. A Power converter in SRG ...

Fuzzy Logic System For Fetal Heart Rate Determination, Innovative Research Publications Irp India, Udo, E.U, Oparaku, O.U.

Innovative Research Publications IRP India

This paper focuses on the Fuzzy Logic System for fetal heart rate determination. The clinical interpretation of fetal heart rate trace is a difficult task and this has led to the development of computerised systems. These systems are limited by their inability to represent uncertainty. This paper describes the development of a fuzzy expert system for fetal heart rate. The fuzzy logic system improved on the crisp system and has achieved the highest overall performance. With the results obtained, it is evident that the fuzzy logic system can be used to improve the efficiency of the clinician position for making ...

Determination Of Rate Of Degradation Of Iron Plates Due To Rust Using Image Processing, Innovative Research Publications Irp India, Priyanka Choudhary, Rohit Anand

Innovative Research Publications IRP India

Most of industries and bridges around us make use of iron for manufacturing their products. On the other hand corrosion is a natural process that deteriorates the integrity of iron surface. Therefore, rusting of iron takes place. To avoid unwanted accidents in industries and bridges, it is necessary to detect rusting in earlier stage, so that it can be prevented. Digital image processing for the detection of the rusting provides fast, accurate and objectives results. In this research paper, we have done a systematic review of algorithms that help us to detect the rust area from a metal (iron).it ...

Sensitivity Based Network Contingency Ranking Using Newton Raphson Power Flow Method, Innovative Research Publications Irp India, M. K. Maharana, Samrat Malakar

Innovative Research Publications IRP India

In the area of power system planning and operation, contingency analysis plays an important role. In the present days, on-line security assessment is done by contingency ranking, with the help of various computer software, incorporating iterative method like Newton Raphson power flow for obtaining the magnitudes of different parameters. The motive of contingency ranking is to create a short list of potential contingencies quickly and rank them according to their severity in an accurate manner. In this paper sensitivity based wide performance index with respect to outage have been presented. The Newton-Raphson power flow results were used to construct two ...

Design Of A Graphical User Interface To Control Voltage And Reactive Power By Using Nine-Area Diagram, Innovative Research Publications Irp India, Chi-Jui Wu, Yu-Wei Liu, Chun-Hsiang Hu, Ming-Ghe Shiha, Jr-Yuan Ke, Yu-Wei Chou

Innovative Research Publications IRP India

For a primary substation (P/S), there are many typical methods to control voltage and reactive power such as adjusting the generator mode, switching shunt capacitor (SC), adjusting on-load tap changer (OLTC), and switching shunt reactor (SR). In this study, a graphical user interface (GUI) is designed combining with nine-area diagram to observe the relationship between voltage and reactive power in a P/S. This GUI not only predicts the effect to dispatchers in short time but also analyzes the sensitivity parameters. Field measurement data were analyzed. Simulation results confirmed the feasibility of compensating the reactive power and adjusting voltage ...

Variable Attenuator Blends Dynamic Range, Linearity, Chin-Leong Lim

Chin-Leong Lim

A voltage variable attenuators (VVA) with compact dimensions and high linearity can be realized by connecting PIN diodes in the form of a π network. However this VVA's maximum frequency is limited to ~1 GHz because of signal leakage through the series diodes' parasitic capacitances. The ceiling frequency can significantly raised by resonating the parasitic capacitance with a parallel inductor. This technique has been previously demonstrated on a discrete design. To reduce component count and size, this work extends the technique to a standalone, highly-integrated module. This paper reports the performances achieved at 3.5 GHz.

The prototype's ...

Automated Detection Of Puffing And Smoking With Wrist Accelerometers, Qu Tang

Electrical and Computer Engineering Master's Theses

Real-time, automatic detection of smoking behavior could lead to novel measurement tools for smoking research and "just-in-time" interventions that may help people quit, reducing preventable deaths. This paper discusses the use of machine learning with wrist accelerometer data for automatic puffing and smoking detection. A two-layer smoking detection model is proposed that incorporates both low-level time domain features and high-level smoking topography such as inter-puff intervals and puff frequency to detect puffing then smoking. On a pilot dataset of 6 individuals observed for 11.8 total hours in real-life settings performing complex tasks while smoking, the model obtains a cross ...

Detecting Body Cavity Bombs With Nuclear Quadrupole Resonance, Michael Collins

Electrical and Computer Engineering Master's Theses

Nuclear Quadrupole Resonance (NQR) is a technology with great potential for detecting hidden explosives. Past NQR research has studied the detection of land mines and bombs concealed within luggage and packages. This thesis focuses on an NQR application that has received less attention and little or no publicly available research: detecting body cavity bombs (BCBs). BCBs include explosives that have been ingested, inserted into orifices, or surgically implanted. BCBs present a threat to aviation and secure facilities. They are extremely difficult to detect with the technology currently employed at security checkpoints.

To evaluate whether or not NQR can be used ...

Self-Regulated Solar Lighting System, Innovative Research Publications Irp India, Mr. Ramesh C R, Prof.Lyla B Das

Innovative Research Publications IRP India

Electricity is a prime concern in today’s world. On observing the path through which we travel daily we can see that a lot of electricity is wasted by glowing sodium wafer lamps and even the traditional tube lights on the electric posts at unnecessary intervals. The self regulating solar system enters into action and exits from functioning depending upon the output from the Day/Night sensing unit. Once the unit indicates arrival of night then the system turns ON, the controlling unit thereafter controls the illumination level of the lamp depending upon the outputs of interruption detector, temperature sensor ...

Chest Worn Pulse Oximeter Integrating Ni-Usrp With Gps Disciplined Clock Transceiver, Innovative Research Publications Irp India, Alfredo U. Ganggangan, Angelo A. Beltran Jr., Evelyn C. Barreto, Princess F. Hernandez, Paul Erick P. De Villa, Mark Tristan Angelo M. Cabatac

Innovative Research Publications IRP India

This paper presents the chest worn pulse oximeter with integrated universal software radio peripheral (USRP) with global positioning systems (GPS) disciplined clock transceiver from National Instruments. It illustrates the respiratory cardio monitoring using the flexible reflective pulse oximeter with ECG. The gathered cardio respiratory data assessed by the microcontroller and the output is sent through to the remote monitor display by means of wireless system. The device also incorporates an early warning feature to alert both the user and the person being monitored. The GPS device is included for tracking and to determine the present location of the client in ...

A Constrained Genetic Algorithm Based On Constraint Handling With Ks Function And Grouping Penalty, Innovative Research Publications Irp India, Jiang Zhansi, Jiang Yulong, Ma Liquan, Feng Jianguo

Innovative Research Publications IRP India

In order to overcome the limitation when using traditional genetic algorithm in solving constrained optimization problems, this paper presents a new method of constrain handling to solve the constrained optimization problems. Firstly, the method makes full use of the condensed characteristics of the KS function to transform multi-constrained optimization problem into a single constraint optimization problem. And then a group penalty method is adopted by genetic algorithm. Aggregate constraint reduces the solution scale effectively and improves the efficiency of searching for global optimization solution. The method of penalty in grouping is used to overcome the difficulty of penalty coefficient selection ...

Dehaze The Image Using Directed Filter Method After Blind Dehazing, Innovative Research Publications Irp India, Kanchan Gahlod, Hemant Verma

Innovative Research Publications IRP India

Haze is generally phenomenon that an atmospheric stuff that greatly degrades the visibility of outdoor scenes. This phenomenon occurs due to the atmosphere constituent parts that absorb and scatter the light. We use the spread map of image in terms of intensity of image except a continuous region which has no edge information. The scheme performs a per-pixel manipulation, which is direct to implement, and then apply the Directed filter to improve the image quality. The simulation results demonstrate the comparative results and even better than the more complex state-of-the-art techniques, having the advantage of being appropriate for real-time applications

A Literature Survey On Different Type Of Energy Efficiently Routing Protocol In Wireless Sensor Network, Innovative Research Publications Irp India, Devendra Patle, Sandip Nemade

Innovative Research Publications IRP India

— Wireless sensor network is an emerging technology which has an immense scope of research and development. It has the potential of quick capturing, processing and transferring data with high resolution to the base station. WSN consists of multiple sensor nodes, these nodes have low storage capability and limited battery life which dies due to the computation and transmission of data. It is not feasible to replace these batteries due to their placement in isolated areas. In this paper we will emphasize on maximizing energy efficiency and improvement of life span of network. Clustering is the technique which balances the load ...

Application Of Electromagnetic Waves In Blood Disorders And Diseases Diagnosis, Hossein Ameri Mahabadi, Hadi Aliakbarian, Mahmoud Moghavvemi

Hossein Ameri Mahabadi

Electromagnetic Waves have various application in different areas of science and technology. Beside its main application in telecommunication, several other fields of applications such as agriculture [1], food [2], and health[3] have been proposed.

The latter, the non-ionizing application of electromagnetic waves, is the main focus of our chapter. This applications are of two types, either medical treatment or biomedical diagnosis of health problems. The latter such as non-contact detection of the vital signs), imaging (noninvasive breast cancer detection), medical sensors (such as those for identifying cancer cell aggressiveness grade), and measurement techniques for the electromagnetic exposure of biological ...

Accelerating Mahout On Heterogeneous Clusters Using Hadoopcl, Xiangyu Li

Electrical and Computer Engineering Master's Theses

MapReduce is a programming model capable of processing massive data in parallel across hundreds of computing nodes in a cluster. It hides many of the complicated details of parallel computing and provides a straightforward interface for programmers to adapt their algorithms to improve productivity. Many MapReduce-based applications have utilized the power of this model, including machine learning. MapReduce can meet the demands of processing massive data generated by user-server interaction in applications including web search, video viewing and online product purchasing. The Mahout recommendation system is one of the most popular open source recommendation systems that employs machine learning techniques ...