Impacts Of Plug-In Electric Vehicle On Residential Electric Distribution System Using Stochastic And Sensitivity Approach,
2011
California Polytechnic State University, San Luis Obispo
Impacts Of Plug-In Electric Vehicle On Residential Electric Distribution System Using Stochastic And Sensitivity Approach, Henry Chigozie Ureh
Master's Theses
Plug-in Electric Vehicles (PEVs) are projected to become a viable means of transportation due to advances in technology and advocates for green and eco-friendly energy solutions. These vehicles are powered partially, or in some cases, solely by the energy stored in their battery packs. The large sizes of these battery packs require large amount of energy to charge, and as the demand for PEV increases, the increase in energy demand needed to recharge these PEV batteries could pose problems to the present electric distribution system. This study examines the potential impacts of PEV on a residential electric distribution system at …
Poincaré Sphere Representation Of The Fixed-Polarizer Rotating-Retarder Optical System,
2011
University of New Orleans
Poincaré Sphere Representation Of The Fixed-Polarizer Rotating-Retarder Optical System, R. M.A. Azzam
Electrical Engineering Faculty Publications
The trajectory of the polarization state of a monochromatic light beam after it passes through a fixed linear polarizer and a rotating linear retarder of arbitrary retardance Δ is determined on the Poincaré sphere. The three-dimensional figure-8 contour is shown to be the line of intersection of a right-circular cylinder with the sphere. The cylinder is parallel to the polar (s3) axis, touches the sphere at the equator (at the point that represents the linear polarization transmitted by the fixed polarizer), and has a radius r=sin2(Δ/2). Projections of the trajectory in the coordinate planes of the …
Giant Magnetostriction In Annealed Co1-XFeX Thin-Films,
2011
University of South Carolina - Columbia
Giant Magnetostriction In Annealed Co1-XFeX Thin-Films, Dwight Hunter, Will Osborn, Ke Wang, Nataliya Kazantseva, Jason R. Hattrick-Simpers, Richard Suchoski, Ryota Takahashi, Marcus L. Young, Apurva Mehta, Leonid A. Bendersky, Same E. Lofland, Manfred Wuttig, Ichiro Takeuchi
Faculty Publications
Chemical and structural heterogeneity and the resulting interaction of coexisting phases can lead to extraordinary behaviours in oxides, as observed in piezoelectric materials at morphotropic phase boundaries and relaxor ferroelectrics. However, such phenomena are rare in metallic alloys. Here we show that, by tuning the presence of structural heterogeneity in textured Co1−xFex thin films, effective magnetostriction λeff as large as 260 p.p.m. can be achieved at low-saturation field of ~10 mT. Assuming λ100 is the dominant component, this number translates to an upper limit of magnetostriction ofλ100≈5λeff >1,000 p.p.m. Microstructural analyses …
Reflection And Transmission Of Line-Source Excited Pulsed Em Fields At A Thin, High-Contrast Layer With Dielectric And Conductive Properties,
2011
Missouri University of Science and Technology
Reflection And Transmission Of Line-Source Excited Pulsed Em Fields At A Thin, High-Contrast Layer With Dielectric And Conductive Properties, Adrianus T. De Hoop, Lijun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
A methodology is presented for analytically modeling the reflection and transmission of line-source excited pulsed electromagnetic fields fields at a thin, planar, high-contrast layer with dielectric and conductive properties. Closed-form time-domain expressions are derived for the field components in a two-dimensional setting via an extension of the Cagniard-DeHoop method. © 2011 IEEE.
A Dynamic Programming Approach: Improving The Performance Of Wireless Networks,
2011
Missouri University of Science and Technology
A Dynamic Programming Approach: Improving The Performance Of Wireless Networks, Sandeep Kolli, Maciej Zawodniok
Electrical and Computer Engineering Faculty Research & Creative Works
Traditional wireless networks focus on transparent data transmission where the data are processed at either the source or destination nodes. in contrast, the proposed approach aims at distributing data processing among the nodes in the network thus providing a higher processing capability than a single device. Moreover, energy consumption is balanced in the proposed scheme since the energy intensive processing will be distributed among the nodes. the performance of a wireless network is dependent on a number of factors including the available energy, energy efficiency, data processing delay, transmission delay, routing decisions, security architecture etc. Typical existing distributed processing schemes …
Finite Element Based Generalized Impedance Boundary Condition For Complicated Em Calculation,
2011
Missouri University of Science and Technology
Finite Element Based Generalized Impedance Boundary Condition For Complicated Em Calculation, Shiquan He, Zaiping Nie, Jun Zh Huang, Lijun Jiang, Weng Cho Chew
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, a finite element based generalized impedance boundary condition (FEM-GIBC) is proposed to solve complicated electromagnetic (EM) problems. Complex structures with arbitrary inhomogeneity and shapes are modeled with the finite element method, and their scattering contributions are transformed to generalized impedance conditions on their boundaries. For each sub-domain, a special GIBC can be established and it is only related to the structures in this domain. Hence, for finite periodic structures, a representative GIBC can be formulated at the boundary of a unit cell. After the GIBC at each boundary is established, the electromagnetic coupling between each impedance boundary …
Simulation And Fabrication Of 3d Spiral Photonic Crystals As Circular Polarizers,
2011
University of Nebraska-Lincoln
Simulation And Fabrication Of 3d Spiral Photonic Crystals As Circular Polarizers, Xuejian Li
Department of Electrical and Computer Engineering: Dissertations, Theses, and Student Research
Three-dimensional (3D) spiral photonic crystals (PhCs) have a periodic varied refractive index (RI) with the periodicity comparable to the wavelength of incident light. They can pass circularly polarized (CP) light with handedness opposite to their own structures’ handedness while block the polarization state with the same handedness. Three-dimensional spiral PhCs for use as circular polarizers have two main advantages over conventional circular polarizers. On the one hand, it has wide operation wavelength based on the photonic band gap caused by PhCs and the interaction between CP light and each individual spiral structure. On the other hand, the height of each …
Modeling Electrically Small Structures In Layered Medium With Augmented Efie Method,
2011
Missouri University of Science and Technology
Modeling Electrically Small Structures In Layered Medium With Augmented Efie Method, Yongpin P. Chen, Lijun Jiang, Zhi Guo Qian, Weng Cho Chew
Electrical and Computer Engineering Faculty Research & Creative Works
Electrically small structures embedded in a planarly layered medium are modeled by the augmented electric field integral equation (EFIE) method in this paper. By separating charge as extra unknown list, and enforcing the current continuity equation, an augmented EFIE (A-EFIE) can be setup. The matrix-friendly formulation of layered medium Green's function is applied and the frequency scaling of the impedance matrix in the moment method is analyzed when the frequency tends to zero. Rank deficiency and the charge neutrality enforcement is also discussed in detail. Numerical results show that the low frequency breakdown of electrically small structures embedded in a …
Finite-Width Gap Excitation And Impedance Models,
2011
Missouri University of Science and Technology
Finite-Width Gap Excitation And Impedance Models, Yat Hei Lo, Shiquan He, Lijun Jiang, Weng Cho Chew
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, we present a new method for the feed model for the method of moments (MoM). It is derived from a more accurate model with the realistic size of the excitation, in order to replace the commonly-used delta-gap excitation model. This new model is formulated around the electric field integration equations (EFIE) where the terms for magnetic current and magnetic field can be removed. Hence it is much simpler to implement and reduces the numerical complexity. In addition, a variational formulation is derived to provide second order accuracy of the input admittance calculation. Moreover, this new formulation can …
Design Of A Retinal Tracking System For Jumping Spiders,
2011
University of Rochester Institute of Optics
Design Of A Retinal Tracking System For Jumping Spiders, Cristina Canavesi, Skye Long, Dennis Fantone, Elizabeth Jakob, Robert R. Jackson, Duane Harland, Jannick P. Rolland
All Peer-Reviewed Publications
We designed an optical system for tracking the retinal movement of a jumping spider as a stimulus is presented to it. The system, using all off-the-shelf optical components except for one custom aspheric plate, consists of three sub-systems that share a common path: a visible stimuli presentation sub-system, a NIR illumination sub-system, and a NIR retinal imaging sub-system. A 25 mm clearance between the last element and the spider ensures a stable positioning of the spider. The stimuli presentation system relays an image from a display to the spider eye, matching the 15 arcmin resolution of the two principal eyes …
Optimized Hyperspectral Imagery Anomaly Detection Through Robust Parameter Design,
2011
Air Force Institute of Technology
Optimized Hyperspectral Imagery Anomaly Detection Through Robust Parameter Design, Francis M. Mindrup
Theses and Dissertations
Anomaly detection algorithms for hyperspectral imagery (HSI) are an important first step in the analysis chain which can reduce the overall amount of data to be processed. The actual amount of data reduced depends greatly on the accuracy of the anomaly detection algorithm implemented. Most, if not all, anomaly detection algorithms require a user to identify some initial parameters. These parameters (or controls) affect overall algorithm performance. Regardless of the anomaly detector being utilized, algorithm performance is often negatively impacted by uncontrollable noise factors which introduce additional variance into the process. In the case of HSI, the noise variables are …
A Reversibility Analysis Of Encoding Methods For Spiking Neural Networks,
2011
Missouri University of Science and Technology
A Reversibility Analysis Of Encoding Methods For Spiking Neural Networks, Catherine Johnson, S. Roychowdhury, Ganesh K. Venayagamoorthy
Mining Engineering Faculty Research & Creative Works
There is much excitement surrounding the idea of using spiking neural networks (SNNs) as the next generation of function-approximating neural networks. However, with the unique mechanism of communication (neural spikes) between neurons comes the challenge of transferring real-world data into the network to process. Many different encoding methods have been developed for SNNs, most temporal and some spatial. This paper analyzes three of them (Poisson rate encoding, Gaussian receptor fields, and a dual-neuron n-bit representation) and tests to see if the information is fully transformed into the spiking patterns. an oft-neglected consideration in encoding for SNNs is whether or not …
Analysis Of Via Impedance Variations With A Polynomial Chaos Method,
2011
Missouri University of Science and Technology
Analysis Of Via Impedance Variations With A Polynomial Chaos Method, Jianxiang Shen, Hanfeng Wang, Ji Chen, Jun Fan
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, we propose a systematic framework for the optimization and analysis of the equivalent characteristic impedance of practical via structures. the framework consists of (a) optimizing via structures for impedance matching using a Genetic algorithm, and (b) numerically characterize, by Polynomial Chaos (PC) method, the sensitivity of the equivalent characteristic impedance to the manufacturing uncertainties in the various geometrical parameters of a via structure. the PC method can be effectively used to compute important statistical information, such as moments, probabilities and sensitivities with respect to the design variables. the PC method is straightforward to implement and can be …
Statistical Estimation Of Root Mean Square Crosstalk In Sfp+ Cable Evaluations,
2011
Missouri University of Science and Technology
Statistical Estimation Of Root Mean Square Crosstalk In Sfp+ Cable Evaluations, Dazhao Liu, Jue Chen, Zhiping Yang, Jun Fan
Electrical and Computer Engineering Faculty Research & Creative Works
A rigorous statistical estimation of the root mean square equation is proposed for near-end crosstalk simulation in SFP+ cable evaluations. This method employs the pulse response, the near-end output in the victim pair due to a single-pulse input of one bit long in the aggressor pair. This pulse response can be obtained from vector network analyzer (VNA) measurements. Thus SFP+ cable evaluations can be effectively performed using easier and more accurate frequency-domain measurements, instead of the time-domain ones defined in the specification. © 2011 IEEE.
Optimizing Decoupling Capacitor Placement To Reduce Effective Inductance,
2011
Missouri University of Science and Technology
Optimizing Decoupling Capacitor Placement To Reduce Effective Inductance, Bruce Archambeault, Jingook Kim, Sam Connor, Jun Fan
Electrical and Computer Engineering Faculty Research & Creative Works
Optimizing decoupling capacitor placement to ensure rapid charge delivery is discussed in this paper. Placing additional decoupling capacitors in close proximity may reduce effective inductance but this inductance is only reduced under certain conditions. © 2011 IEEE.
High Frequency Permeability Of Fe-Al-Si Granular Composite Materials,
2011
Missouri University of Science and Technology
High Frequency Permeability Of Fe-Al-Si Granular Composite Materials, Takanori Tsutaoka, Taisuke Ono, Aiko Tsurunaga, Teruhiro Kasagi, Kenichi Hatakeyama, Marina Koledintseva
Electrical and Computer Engineering Faculty Research & Creative Works
High-frequency electromagnetic properties of Fe-Al-Si alloy (Sendust) granular composite materials have been studied by measuring their relative complex permeability (μr = μr’ – jμr”) and permittivity (εr = εr’ – j εr”) spectra. The bulk Fe-Al-Si alloy shows metallic electrical conduction, and permeability decreases rapidly with frequency. On the other hand, Sendust powder shows relatively high electrical resistivity. Sendust composite material demonstrates insulating electrical properties up to at least 80 vol.% particle content. Thus the relatively high permeability in the microwave frequency range can be obtained. Frequency dispersion characteristics of …
Multipoint Model Order Reduction Of Delayed Peec Systems,
2011
Missouri University of Science and Technology
Multipoint Model Order Reduction Of Delayed Peec Systems, Francesco Ferranti, Michel Nakhla, Giulio Antonini, Tom Dhaene, Luc Knockaert, Albert E. Ruehli
Electrical and Computer Engineering Faculty Research & Creative Works
We present a new model order reduction technique for electrically large systems with delay elements, which can be modeled by means of neutral delayed differential equations. an adaptive multipoint expansion and model order reduction of equivalent first order systems are combined in the new proposed method that preserves the neutral delayed differential formulation. an adaptive algorithm to select the expansion points is presented. the proposed model order reduction technique is validated by pertinent numerical results. a comparison with a previous model order reduction algorithm based on a single point expansion is performed to show the considerably improved modeling capability of …
Near-Field H To E Transformation Using Plane Wave Spectrum Theory,
2011
Missouri University of Science and Technology
Near-Field H To E Transformation Using Plane Wave Spectrum Theory, Zhenwei Yu, Yaojiang Zhang, Soji Sajuyigbe, R. Camacho, Jason A. Mix, Kevin Slattery, Matthew S. Halligan, Jun Fan
Electrical and Computer Engineering Faculty Research & Creative Works
Near-field measurements are widely used to indicate the radiation from integrated circuits (IC). to minimize the number of field components measured in a near-field scan, it is necessary to calculate the electric field from magnetic field or vice versa. in this paper, a method based on plane wave spectrum theory is proposed to perform the H to E transformation, and a filtering technique is proposed to address the noise problem in the calculation. a simple active circuit in a 3-D full-wave simulation tool is used to validate this method. This method is useful to reduce the number of field components …
Skin-Effect Model For Time And Frequency Domain Peec Solver,
2011
Missouri University of Science and Technology
Skin-Effect Model For Time And Frequency Domain Peec Solver, Giulio Antonini, Albert E. Ruehli
Electrical and Computer Engineering Faculty Research & Creative Works
A challenging issue for the solution of large electromagnetic problems is the efficient modeling of the broadband skin-effect for conducting planes and 3D shapes. the inclusion of such models in an EM solver can be very costly in compute time and memory requirements. Progress has recently been made in the design of skin-effect models. Several properties of a model are desirable for the solution of practical problems such as the broadband frequency domain or the time domain applicability. in this paper, we present a new model which meets some of these challenges and which is suitable for the PEEC solution …
Characterization And Modeling Of A Grid-Connected Photovoltaic System Using A Recurrent Neural Network,
2011
Missouri University of Science and Technology
Characterization And Modeling Of A Grid-Connected Photovoltaic System Using A Recurrent Neural Network, Daniel M. Riley, Ganesh K. Venayagamoorthy
Electrical and Computer Engineering Faculty Research & Creative Works
Photovoltaic (PV) system modeling is used throughout the photovoltaic industry for the prediction of PV system output under a given set of weather conditions. PV system modeling has a wide range of uses including: prepurchase comparisons of PV system components, system health monitoring, and payback (return on investment) times. in order to adequately model a PV system, the system must be characterized to establish the relationship between given weather inputs (e.g., irradiance, spectrum, temperature) and desired system outputs (e.g., AC power, module temperature). Traditional approaches to system characterization involve characterizing and modeling each component in a PV system and forming …
