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Electrical and Computer Engineering Faculty Research & Creative Works

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Full-Text Articles in Engineering

Calculating The Scattered Fields From The Fock Currents Of The 3-D Convex Scatterers By The Incremental Length Diffraction Technique, Yu Mao Wu, Weng Cho Chew, Tie Jun Cui, Ya Qiu Jin, Li (Lijun) Jun Jiang Oct 2015

Calculating The Scattered Fields From The Fock Currents Of The 3-D Convex Scatterers By The Incremental Length Diffraction Technique, Yu Mao Wu, Weng Cho Chew, Tie Jun Cui, Ya Qiu Jin, Li (Lijun) Jun Jiang

Electrical and Computer Engineering Faculty Research & Creative Works

In this work, we consider the accuracy improvement of the high frequency scattered fields from the 3-D convex scatterers with the aid of the Fock current and the incremental length diffraction coefficient (ILDC) technique. To efficiently calculate the Fock currents, we adopt the numerical contour deformation method. Then, by using the Fock currents and the ILDC technique, high frequency scattered fields are clearly formulated. Compared to the PO scattered fields from the 3-D convex sphere, numerical results demonstrate significant accuracy enhancement of the scattered field via the Fock current.

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Electromagnetic Characterization For Graphene By The Peec Method, Ying S. Cao, Li (Lijun) Jun Jiang Oct 2015

Electromagnetic Characterization For Graphene By The Peec Method, Ying S. Cao, Li (Lijun) Jun Jiang

Electrical and Computer Engineering Faculty Research & Creative Works

The electromagnetic (EM) features of graphene are characterized by the partial element equivalent circuit (PEEC) model for the first time with an impedance boundary condition. By incorporating the impedance boundary condition into the PEEC model, a novel surface conductivity circuit is proposed for graphene. Furthermore, the definition of the absorption cross section (σabs) and the scattering cross section (σsca) are revisited to make them feasible for PEEC analysis. The application of the impedance boundary condition significantly alleviates the memory consumption and the CPU time. To validate the proposed algorithm, numerical examples are presented and compared with existing references.

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Modeling Of Magnetized Graphene From Microwave To Thz Range By Dgtd With A Scalar Rbc And An Ade, Ping Li, Li (Lijun) Jun Jiang Oct 2015

Modeling Of Magnetized Graphene From Microwave To Thz Range By Dgtd With A Scalar Rbc And An Ade, Ping Li, Li (Lijun) Jun Jiang

Electrical and Computer Engineering Faculty Research & Creative Works

This paper presents a discontinuous Galerkin timedomain (DGTD) method for the transient analysis of magnetized graphene from the microwave to terahertz (THz) frequencies. By considering the atom thick graphene layer as an infinitely thin conductive sheet with finite surface conductivity, a frequency-dependent anisotropic resistive boundary condition (RBC) is obtained. Based on this RBC, the direct volumetric discretization of graphene layer is avoided. Instead of directly deriving the numerical flux for DGTD considering the presence of this anisotropic and dispersive RBC, an auxiliary surface polarization current governed by a first-order time-dependent partial differential equation (PDE) is introduced over the graphene with …

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Nonlinear Acoustic Echo Cancellation Using Voltage And Current Feedback, Pratik Shah, Ian Lewis, Steven Grant, Sylvain Angrignon Oct 2015

Nonlinear Acoustic Echo Cancellation Using Voltage And Current Feedback, Pratik Shah, Ian Lewis, Steven Grant, Sylvain Angrignon

Electrical and Computer Engineering Faculty Research & Creative Works

Acoustic echo cancellation (AEC) is a well-studied problem. The underlying assumption in most echo cancellation solutions is that the echo path following the reference signal is completely linear. However, in many handheld devices, the echo path following the reference signal is nonlinear. The reason for this nonlinearity in the echo path is the use of smaller inexpensive loudspeakers and the desire for generating high sound pressure levels. This brings about the need for a nonlinear echo canceler to maintain the required echo return loss enhancement (ERLE). Many software-based solutions have been proposed to solve this problem, but the computational complexity …

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Wiretap Channel Ii With A Noisy Main Channel, Mohamed Nafea, Aylin Yener Sep 2015

Wiretap Channel Ii With A Noisy Main Channel, Mohamed Nafea, Aylin Yener

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, a wiretap channel where the transmitter and receiver communicate through a discrete memoryless channel, and the eavesdropper (Eve) has perfect access to a fixed fraction of transmitted symbols (of its choosing) is considered. An outer bound for the rate-equivocation region of the channel, for all such fractions, is derived. An achievable scheme, which provides an inner bound for the rate-equivocation region, is proposed. The achievability is established by defining a class of good codebooks for which there exists a good partition that achieves the required level of equivocation no matter what subset of symbols Eve chooses. It …

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Introduction To: Special Issue On Cross-Layer System Design, Yiyu Shi, Takashi Sato Sep 2015

Introduction To: Special Issue On Cross-Layer System Design, Yiyu Shi, Takashi Sato

Electrical and Computer Engineering Faculty Research & Creative Works

No abstract provided.

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Using Simulation & Joint Time/Frequency Domain Analysis To Evaluate Absorber/Lossy Material Performance In Resonant Cavities, Bruce Archambeault, Michael Varner, Jiawei Zhang, Sam Connor, Edward Wheeler Sep 2015

Using Simulation & Joint Time/Frequency Domain Analysis To Evaluate Absorber/Lossy Material Performance In Resonant Cavities, Bruce Archambeault, Michael Varner, Jiawei Zhang, Sam Connor, Edward Wheeler

Electrical and Computer Engineering Faculty Research & Creative Works

Comparing the effectiveness of different absorber/lossy materials as a function of frequency can be difficult and prone to misunderstanding when the reduction in field strength is observed directly. Often these materials are used in highly resonant cavities, therefore a better measure of the reduction of field strength is the resonant quality factor (Q-factor). The Joint Time-Frequency domain analysis technique allows simulation data from time domain simulations to be easily converted to Q-factor and allows quick and straightforward analysis of the improvement gained by using various absorber/lossy materials. Measurements are made to validate the simulation results.

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Secure Degrees Of Freedom Of N ×N ×M Wiretap Channel With A K-Antenna Cooperative Jammer, Mohamed Nafea, Aylin Yener Sep 2015

Secure Degrees Of Freedom Of N ×N ×M Wiretap Channel With A K-Antenna Cooperative Jammer, Mohamed Nafea, Aylin Yener

Electrical and Computer Engineering Faculty Research & Creative Works

The secure degrees of freedom (s.d.o.f.) of a multiantenna Gaussian wiretap channel with N antennas at the transmitter and receiver and an arbitrary number of antennas, M, at the wiretapper is characterized when a multiantenna cooperative jammer (CJ) is available as a helper. This generalizes our previous result that assumed the same number of antennas at the eavesdropper as the legitimate parties. In particular, for arbitrary values of N and M, the s.d.o.f. is derived for all possible values of the number of antennae at the CJ, K. The achievability is based on a variety of signaling, beamforming, and alignment …

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Secure Massive Mimo Transmission In The Presence Of An Active Eavesdropper, Yongpeng Wu, Robert Schober, Derrick Wing Kwan Ng, Chengshan Xiao, Giuseppe Caire Sep 2015

Secure Massive Mimo Transmission In The Presence Of An Active Eavesdropper, Yongpeng Wu, Robert Schober, Derrick Wing Kwan Ng, Chengshan Xiao, Giuseppe Caire

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, we investigate secure and reliable transmission strategies for multi-cell multi-user massive multiple input multiple-output (MIMO) systems in the presence of an active eavesdropper. We consider a time-division duplex system where uplink training is required, and an active eavesdropper can attack the training phase to cause pilot contamination at the transmitter. This forces the precoder used in the subsequent downlink transmission phase to implicitly beamform towards the eavesdropper, thus increasing its received signal power. We derive an asymptotic achievable secrecy rate for matched filter precoding and artificial noise (AN) generation at the transmitter when the number of transmit …

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A Free Deterministic Equivalent For The Capacity Of Mimo Mac With Distributed Antenna Sets, An An Lu, Xiqi Gao, Chengshan Xiao Sep 2015

A Free Deterministic Equivalent For The Capacity Of Mimo Mac With Distributed Antenna Sets, An An Lu, Xiqi Gao, Chengshan Xiao

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, we propose a free deterministic equivalent for the capacity analysis of multi-input multi-output (MIMO) multiple access channel (MAC) with distributed antenna sets. In the analysis, we use the operator-valued free probability framework, which is much more straightforward than the widely used methods, i.e., the Bai and Silverstein method and the Gaussian method. By replacing independent random Gaussian variables with freely independent circular entries, we obtain the free deterministic equivalent of our channel model. To evaluate the capacity, we use the Shannon transform of the free deterministic equivalent to approximate that of the channel model. The free deterministic …

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An Optimized Nlms Algorithm For Acoustic Echo Cancellation, Silviu Ciochina, Constantin Paleologu, Jacob Benesty, Steven L. Grant Aug 2015

An Optimized Nlms Algorithm For Acoustic Echo Cancellation, Silviu Ciochina, Constantin Paleologu, Jacob Benesty, Steven L. Grant

Electrical and Computer Engineering Faculty Research & Creative Works

In order to improve the overall performance of the normalized least-mean-square (NLMS) algorithm, there is the need to control its main parameters, i.e., the normalized step-size and regularization terms. In this context, the variable step-size and variable regularized versions of the NLMS algorithm are designed to address the conflicting requirement of fast convergence and low mis adjustment. In this paper, we propose an optimized NLMS algorithm for acoustic echo cancellation (AEC). This algorithm is based on a joint-optimization on both the normalized step-size and regularization parameters, in the context of a state variable model (similar to Kalman filtering). The simulation …

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4h-Sic Electrostatic Cantilever Actuator Released By Photoelectrochemical Etching And Application For Frequency Mixing, F. Zhao, A. Lim, Q. Tran, C. F. Huang Aug 2015

4h-Sic Electrostatic Cantilever Actuator Released By Photoelectrochemical Etching And Application For Frequency Mixing, F. Zhao, A. Lim, Q. Tran, C. F. Huang

Electrical and Computer Engineering Faculty Research & Creative Works

This paper reports an electrostatically actuated single crystal 4H-SiC cantilever performing frequency mixing. In order to achieve electrostatic actuation and solve the challenge of releasing MEMS structures due to the extreme chemical hardness of 4H-SiC, an n-p-n homoepitaxial structure was chosen, with cantilever actuators released by photoelectrochemical (PEC) etching. The middle p-SiC layer acts as a sacrificial layer in PEC etching to release actuators and also isolates the top n-SiC cantilever from the bottom n-SiC substrate to realize electrostatic actuation. This study shows that electrostatically actuated RF MEMS capable of operating in harsh environments are attainable by single crystal 4H-SiC …

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An Improved Variable Step-Size Zero-Point Attracting Projection Algorithm, Jianming Liu, Steven L. Grant Aug 2015

An Improved Variable Step-Size Zero-Point Attracting Projection Algorithm, Jianming Liu, Steven L. Grant

Electrical and Computer Engineering Faculty Research & Creative Works

This paper proposes an improved variable step-size (VSS) scheme for zero-point attracting projection (ZAP) algorithm. The proposed VSS is proportional to the sparseness difference between filter coefficients and the true impulse response. Meanwhile, it works for both sparse and non-sparse system identification, and simulation results demonstrate that the proposed algorithm could provide both faster convergence rate and better tracking ability than previous ones.

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Fast Data Pattern Based Electromagnetic Interference Evaluation For Ic Packaging, Nick K.H. Huang, Li (Lijun) Jun Jiang Aug 2015

Fast Data Pattern Based Electromagnetic Interference Evaluation For Ic Packaging, Nick K.H. Huang, Li (Lijun) Jun Jiang

Electrical and Computer Engineering Faculty Research & Creative Works

Electromagnetic interference (EMI) is becoming more serious when the data rate of the digital system continues increasing. However, its modeling and analysis are very challenging. In this paper, a novel electromagnetic superposition method is developed to model the IC packaging electromagnetic emission. It employs the equivalence principle to obtain the electromagnetic field response over a broad spectrum. Then it uses the linear property of the passive parasitic system to superpose the contribution of different signals on the packaging. As a result, with certain pre-calculations, it is convenient to compute the electromagnetic emission efficiently from different signals with various data pattern …

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The Fast Contour Deformation Method For Calculating The High Frequency Scattered Field From The Fock Current On The Convex Scatterer, Yu Mao Wu, Weng Cho Chew, Li (Lijun) Jun Jiang Aug 2015

The Fast Contour Deformation Method For Calculating The High Frequency Scattered Field From The Fock Current On The Convex Scatterer, Yu Mao Wu, Weng Cho Chew, Li (Lijun) Jun Jiang

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, the Fock current from the 3-D convex cylinder is considered. By using the incremental length diffraction coefficient technique (ILDC), the resultant high frequency scattered fields are expressed in terms of the Fock current from convex scatterer. To efficiently solve the scattered fields, we propose the efficient NSDP method. Numerical examples from the convex cylinder scatterer illustrate that the proposed NSDP method for calculating the high frequency scattered fields could achieve the frequency independent computational workload and error controllable accuracy.

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Method Of Effective Roughness Dielectric In A Pcb: Measurement And Full-Wave Simulation Verification, Marina Koledintseva, Tracey Vincent, Antonio Ciccomancini Scogna, Scott Hinaga Aug 2015

Method Of Effective Roughness Dielectric In A Pcb: Measurement And Full-Wave Simulation Verification, Marina Koledintseva, Tracey Vincent, Antonio Ciccomancini Scogna, Scott Hinaga

Electrical and Computer Engineering Faculty Research & Creative Works

Surface roughness topography of printed circuit boards (PCBs) needs to be included in signal integrity simulations in order to accurately predict the insertion loss of the structure and its delay time. An effective roughness dielectric (ERD) model can be used to substitute an inhomogeneous interface between copper foil and laminate dielectric in a PCB. Herein, this approach is tested for verification using 3-D full-wave numerical simulations. These ERD layers with the appropriate complex permittivity are included in the modeling of strip line examples. The parameters of an ambient laminate dielectric refined from conductor roughness in the strip line are determined …

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Uncertainty Quantification For Electromagnetic Systems Using Asgc And Dgtd Method, Ping Li, Li (Lijun) Jun Jiang Aug 2015

Uncertainty Quantification For Electromagnetic Systems Using Asgc And Dgtd Method, Ping Li, Li (Lijun) Jun Jiang

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, an adaptive hierarchical sparse grid collocation (ASGC) method combined with the discontinuous Galerkin time-domain method is leveraged to quantify the impacts of random parameters on the electromagnetics systems. The ASGC method approximates the stochastic observables of interest using interpolation functions over a set of collocation points determined by the Smolyak's algorithm integrated with an adaptive strategy. Instead of resorting to a full-tensor product sense, the Smolyak's algorithm constructs the collocation points in a hierarchical scheme with the interpolation level. Enhanced by an adaptive strategy, the Smolyak's algorithm will sample more points along important dimensions with sharp variations …

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Distributive Radiation And Transfer Characterization Based On The Peec Method, Ying S. Cao, Li (Lijun) Jun Jiang, Albert E. Ruehli Aug 2015

Distributive Radiation And Transfer Characterization Based On The Peec Method, Ying S. Cao, Li (Lijun) Jun Jiang, Albert E. Ruehli

Electrical and Computer Engineering Faculty Research & Creative Works

Power radiation and radiated coupling among different structures represent an important area for research study. The partial element equivalent circuit method (PEEC) is a powerful technique which bridges the gap between the electromagnetic and circuit theories. In this paper, we develop a new approach for PEEC to calculate the distributive power radiation and couplings. With this approach, formulations for both the radiated power and the transferred power can be evaluated. Further, the physical meanings of the power results are interpreted according to the conservation of energy law. We use electric dipoles, magnetic dipoles and patch antennas as well as coupled …

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Passive Equalizer And High-Speed Digital Signal Transmission System Using The Same, Eak Hwan Song, Young Kun Kwon, Won Seob Kim, Hark Byeong Park, Hyun Sik Yun, Eun Seok Hong, Chulsoon Hwang Jul 2015

Passive Equalizer And High-Speed Digital Signal Transmission System Using The Same, Eak Hwan Song, Young Kun Kwon, Won Seob Kim, Hark Byeong Park, Hyun Sik Yun, Eun Seok Hong, Chulsoon Hwang

Electrical and Computer Engineering Faculty Research & Creative Works

Disclosed herein are a passive equalizer and a high-speed digital signal transmission system, including first and second impedances connected in series to a first transfer line, third and fourth impedances connected in series to a second transfer line, a first inductor connected in parallel between the first impedance and the second impedance, a second inductor connected in parallel between the third impedance and the fourth impedance, and a resistor connected in series between the first inductor and the second inductor.

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Transmission-Line Equivalent And Microstrip Structure For Planar Möbius Loop Resonator, Kirti Dhwaj, Hanseuyng Lee, Lijun Jiang, Tatsuo Itoh Jul 2015

Transmission-Line Equivalent And Microstrip Structure For Planar Möbius Loop Resonator, Kirti Dhwaj, Hanseuyng Lee, Lijun Jiang, Tatsuo Itoh

Electrical and Computer Engineering Faculty Research & Creative Works

A transmission line model for planar Möbius loop resonator is presented. Theoretical background for the Möbius loop is developed by treating it as a ring resonator. Even-Odd mode analysis is used to account for the dual mode nature of the resonator. Also, the presence of two transmission zeroes is explained using the proposed model. The transmission line model is then used to implement a simple microstrip version of the Möbius loop resonator. A single resonator is then used to implement a dual-mode bandpass filter. Simulation and test results of the structure are presented.

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Impact Assessment Of Net Metering On Smart Home Cyberattack Detection, Yang Liu, Shiyan Hu, Jie Wu, Yiyu Shi, Yier Jin Jul 2015

Impact Assessment Of Net Metering On Smart Home Cyberattack Detection, Yang Liu, Shiyan Hu, Jie Wu, Yiyu Shi, Yier Jin

Electrical and Computer Engineering Faculty Research & Creative Works

Despite the increasing popularity of the smart home concept, such a technology is vulnerable to various security threats such as pricing cyberattacks. There are some technical advances in developing detection and defense frameworks against those pricing cyberattacks. However, none of them considers the impact of net metering, which allows the customers to sell the excessively generated renewable energy back to the grid. At a superficial glance, net metering seems to be irrelevant to the cybersecurity, while this paper demonstrates that its implication is actually profound. In this paper, we propose to analyze the impact of the net metering technology on …

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Efficient Location Identification Of Multiple Line Outages With Limited Pmus In Smart Grids, Jie Wu, Jinjun Xiong, Yiyu Shi Jul 2015

Efficient Location Identification Of Multiple Line Outages With Limited Pmus In Smart Grids, Jie Wu, Jinjun Xiong, Yiyu Shi

Electrical and Computer Engineering Faculty Research & Creative Works

The efficient location identification of multiple line outages is critical to not only cascading failure elimination but also repair cost reduction. Most of existing methods, however, fail to handle location identification well. This failure typically occurs because the methods cannot overcome two challenges: the very limited number of phasor measurement units (PMUs) and the high computational complexity. This paper presents an efficient algorithm inspired by the ambiguity group theory to identify the locations of line outages with limited PMUs. Using 14-, 57-, 118-, 300-, and 2383-bus systems, our experimental study demonstrates that the proposed technique successfully identifies the most likely …

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Experimental Study Of Counter-Doped Junction Termination Extension For 4h-Sic Power Devices, Jheng Yi Jiang, Hua Chih Hsu, Kuan Wei Chu, Chih Fang Huang, Feng Zhao Jul 2015

Experimental Study Of Counter-Doped Junction Termination Extension For 4h-Sic Power Devices, Jheng Yi Jiang, Hua Chih Hsu, Kuan Wei Chu, Chih Fang Huang, Feng Zhao

Electrical and Computer Engineering Faculty Research & Creative Works

In this letter, a counter-doped junction termination extension (CD-JTE) structure was experimentally implemented and studied. Two groups of 4H-SiC PiN diodes were fabricated with two n-type drift layer thicknesses of 11 and 30 \mu \text{m}, respectively, and with different termination structures, in order to demonstrate the wide JTE dose tolerance of CD-JTE. Three different doses, 1.7 \times 10^{13}, 2.2\times 10^{13} , and 2.8\times 10^{13} cm ^{-2} , were used for the critical JTE implantation. The measured breakdown voltages (BVs) of the diodes with all termination structures and JTE doses were compared with simulation predictions. Electroluminescence at the BV was recorded …

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A Resistive Boundary Condition Enhanced Dgtd Scheme For The Transient Analysis Of Graphene, Ping Li, Li (Lijun) Jun Jiang, Hakan Baʇci Jul 2015

A Resistive Boundary Condition Enhanced Dgtd Scheme For The Transient Analysis Of Graphene, Ping Li, Li (Lijun) Jun Jiang, Hakan Baʇci

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, the electromagnetic (EM) features of graphene are characterized by a discontinuous Galerkin time-domain (DGTD) algorithm with a resistive boundary condition (RBC). The atomically thick graphene is equivalently modeled using an RBC by regarding the graphene as an infinitesimally thin conductive sheet. To incorporate RBC into the DGTD analysis, the surface conductivity of the graphene composed of contributions from both intraband and interband terms is first approximated by rational basis functions using the fast-relaxation vector-fitting (FRVF) method in the Laplace domain. Next, through the inverse Laplace transform, the corresponding time-domain matrix equations in integral can be obtained. Finally, …

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On The Efficacy Of Through-Silicon-Via Inductors, Umamaheswara Rao Tida, Rongbo Yang, Cheng Zhuo, Yiyu Shi Jul 2015

On The Efficacy Of Through-Silicon-Via Inductors, Umamaheswara Rao Tida, Rongbo Yang, Cheng Zhuo, Yiyu Shi

Electrical and Computer Engineering Faculty Research & Creative Works

Through-silicon-vias (TSVs) can potentially be used to implement inductors in 3-D integrated systems for minimal footprint and large inductance. However, different from conventional 2-D spiral inductors, TSV inductors are fully buried in the lossy substrate, thus suffering from low quality factors. In this paper, we systematically examine how various process and design parameters affect their performance. A few interesting phenomena that are unique to TSV inductors are observed. We then propose a novel shield mechanism utilizing the microchannel, a technique conventionally used for heat removal, to reduce the substrate loss. The technique increases the quality factor and inductance of the …

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Real Time Mission Planning, Emad William Saad, Stefan Richard Bieniawski, Paul Edward Riley Pigg, John Lyle Vian, Paul Michael Robinette, Donald C. Wunsch Jun 2015

Real Time Mission Planning, Emad William Saad, Stefan Richard Bieniawski, Paul Edward Riley Pigg, John Lyle Vian, Paul Michael Robinette, Donald C. Wunsch

Electrical and Computer Engineering Faculty Research & Creative Works

The different advantageous embodiments provide a system comprising a number of computers, a graphical user interface, first program code stored on the computer, and second program code stored on the computer. The graphical user interface is executed by a computer in the number of computers. The computer is configured to run the first program code to define a mission using a number of mission elements. The computer is configured to run the second program code to generate instructions for a number of assets to execute the mission and monitor the number of assets during execution of the mission.

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Optimal Selected Phasor Measurement Units For Identifying Multiple Line Outages In Smart Grid, Jie Wu, Jinjun Xiong, Prasenjit Shil, Yiyu Shi Jun 2015

Optimal Selected Phasor Measurement Units For Identifying Multiple Line Outages In Smart Grid, Jie Wu, Jinjun Xiong, Prasenjit Shil, Yiyu Shi

Electrical and Computer Engineering Faculty Research & Creative Works

Thanks to the advent of clock synchronization via the global positioning system (GPS), phasor measurement units (PMUs) collecting both the magnitude and phase angle with higher precision have implications for monitoring performance across the wide area of smart grids. Owing to high PMUs installation costs, developing optimal strategy of PMUs placement is important to monitor the transmission system status in the wide area. To characterize the performance of line outage identification, this paper firstly proposes the statistical model to describe the average identification capability of multiple line outages. Using this model, we develop a global optimal PMUs placement strategy to …

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Preface, Gennady Fridman, Jeremy Levesley, Ivan Tyukin, Donald C. Wunsch Jun 2015

Preface, Gennady Fridman, Jeremy Levesley, Ivan Tyukin, Donald C. Wunsch

Electrical and Computer Engineering Faculty Research & Creative Works

In August 2014 a conference on “Model reduction across disciplines” was held in Leicester, UK. As a scientific field, model reduction is an important part of mathematical modelling and data analysis with very wide areas of applications. The main scientific goal of the conference was to facilitate interdisciplinary discussion of model reduction and coarse-graining methodologies in order to reveal their general mathematical nature. This time, however, the conference had an additional personal and more profound mission – it was dedicated to the 60th birthday of Professor Alexander Gorban (albeit with some delay) whose fantastic achievements in applying model reduction techniques …

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Work-In-Progress: Statistics Components In A Circuits Laboratory For Ece Sophomores, Steve Eugene Watkins, Theresa M. Swift, Amardeep Kaur Jun 2015

Work-In-Progress: Statistics Components In A Circuits Laboratory For Ece Sophomores, Steve Eugene Watkins, Theresa M. Swift, Amardeep Kaur

Electrical and Computer Engineering Faculty Research & Creative Works

Statistics concepts are required for undergraduate curricula in electrical engineering and computer engineering (ECE). Accreditation guidelines specify that such instruction must include “applications appropriate to the program name” [ABET Criteria for Accrediting Engineering Programs, 2014-2015]. Curricula content in probability and statistics are commonly done in a stand-alone course, but additional exposure within engineering-content courses can provide great value. Many basic concepts can be introduced before the comprehensive stand-alone course. A good ECE context is an electrical circuits laboratory in which students need to understand electrical component tolerances and related design issues. Statistics-related assignments in a required, sophomore-level laboratory course are …

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Methods And Systems For Biclustering Algorithm, Donald C. Wunsch, Rui Xu, Sejun Kim May 2015

Methods And Systems For Biclustering Algorithm, Donald C. Wunsch, Rui Xu, Sejun Kim

Electrical and Computer Engineering Faculty Research & Creative Works

Methods and systems for improved unsupervised learning are described. The unsupervised learning can consist of biclustering a data set, e.g., by biclustering subsets of the entire data set. In an example, the biclustering does not include feeding know and proven results into the biclustering methodology or system. A hierarchical approach can be used that feeds proven clusters back into the biclustering methodology or system as the input. Data that does not cluster may be discarded. Thus, a very large unknown data set can be acted on to learn about the data. The system is also amenable to parallelization.

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