Electrical and Electronics Systems Research Publications

Publications

Spontaneous imbibition of water and determination of effective contact angles in the Eagle Ford Shale Formation using neutron imaging

Journal: Spinger Link

Understanding of fundamental processes and prediction of optimal parameters during the horizontal drilling and hydraulic fracturing process results in economically effective improvement of oil and natural gas extraction. Although modern analytical and computational models can capture fracture growth, there is a lack...

Vehicle Classification and Identification Using Multi-Modal Sensing and Signal Learning

Journal: IEEE Xplore

Vehicle counting, time-of-travel analysis, and other traffic studies frequently require the classification and identification of vehicles in a roadway. Unfortunately, many current technologies for identifying vehicles, such as image-based methods that use cameras and machine vision, are not appropriate for studies...

A Novel Technique Applying Spectral Estimation to Johnson Noise Thermometry

Journal: Nuclear Technology

Johnson noise thermometry is one of many important measurement techniques used to monitor the safety levels and stability in a nuclear reactor. However, this measurement is very dependent on the minimal electromagnetic environment. Properly removing unwanted electromagnetic interference (EMI) is critical for accurate...

Single crystal to polycrystal neutron transmission simulation

Journal: Review of Scientific Instruments

A collection of routines for calculation of the total cross section that determines the attenuation of neutrons by crystalline solids is presented. The total cross section is calculated semi-empirically as a function of crystal structure, neutron energy, temperature, and crystal orientation. The semi-empirical...

Community Microgrid Scheduling Considering Network Operational Constraints and Building Thermal Dynamics

Journal: Energies

This paper proposes a Mixed Integer Conic Programming (MICP) model for community microgrids considering the network operational constraints and building thermal dynamics. The proposed multi-objective optimization model optimizes not only the operating cost, including fuel cost, electricity purchasing/selling, storage...

An adaptive DC-bus stabilizer for single-phase grid-connected renewable energy source system

Journal: Energy Conversion Congress and Exposition

This paper proposes an adaptive DC-bus stabilizer for single-phase grid-connected voltage source converter (VSC) with small-scale renewable energy integration. To enhance converter's power density, the conventional active power decoupling (APD) techniques were adopted to reduce the DC capacitance by compensating the...

Temperature-Dependent Characterization, Modeling, and Switching Speed-Limitation Analysis of Third-Generation 10-kV SiC MOSFET

Journal: IEEE Transactions on Power Electronics

The temperature-dependent characteristics of the third-generation 10-kV/20-A SiC MOSFET including the static characteristics and switching performance are carried out in this paper. The steady-state characteristics, including saturation current, output characteristics, antiparallel diode, and parasitic capacitance,...

An Efficient Modulation Strategy for Cascaded Photovoltaic Systems Suffering From Module Mismatch

Journal: IEEE Journal of Emerging and Selected Topics in Power Electronics

Modular multilevel cascaded converter (MMCC) is a promising technique for medium/high-voltage high-power photovoltaic systems due to its modularity, scalability, and capability of distributed maximum power point tracking (MPPT) etc. However, distributed MPPT under module-mismatch might polarize the distribution of ac...

Fabrication of highly dense isotropic Nd-Fe-B nylon bonded magnets via extrusion-based additive manufacturing

Journal: ScienceDirect

Magnetically isotropic bonded magnets with a high loading fraction of 70 vol.% Nd-Fe-B are fabricated via an extrusion-based additive manufacturing, or 3D printing system that enables rapid production of large parts. The density of the printed magnet is ∼ 5.2 g/cm3. The room temperature magnetic properties are:...

Spontaneous imbibition of water and determination of effective contact angles in the Eagle Ford Shale Formation using neutron imaging

Journal: Journal of Earth Science

Understanding of fundamental processes and prediction of optimal parameters during the horizontal drilling and hydraulic fracturing process results in economically effective improvement of oil and natural gas extraction.  Although modern analytical and computational models can capture fracture growth, there is a lack...

Vehicular Integration of Wireless Power Transfer Systems and Hardware Interoperability Case Studies

Several wireless charging methods are under development or available as an aftermarket option in the light-duty automotive market. However, there are not a sufficient number of studies detailing the vehicle integration methods, particularly a complete vehicle integration with higher power levels. This paper presents...

Drebrin-mediated microtubule–actomyosin coupling steers cerebellar granule neuron nucleokinesis and migration pathway selection

Journal: Nature Communications

Neuronal migration from a germinal zone to a final laminar position is essential for the morphogenesis of neuronal circuits. While it is hypothesized that microtubule–actomyosin crosstalk is required for a neuron’s ‘two-stroke’ nucleokinesis cycle, the molecular mechanisms controlling such crosstalk are not defined....

An HDF5-Based Framework for the Distribution and Analysis of Ultrasonic Concrete Data

There are many commercial ultrasonic tomography devices (UTDs) available for use in nondestructive evaluation (NDE) of reinforced concrete structures. These devices emit, measure, and store ultrasonic signals typically in the 25 kHz to 5 MHz frequency range. UTDs are characterized by a composition of multiple...

Failure Analysis of a Reactor Pool Cooling Pump Using Modal and Vibration Analysis

Two 75 HP pumps redundantly supply cooling water to the reactor pool of the High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory (ORNL). Due to a recent history of premature bearing failures, one of these pumps has undergone maintenance to deal with possible issues of misalignment and base looseness....

Guide for Standards Based Testing of Radiation Detection Systems

The Preventative Radiological/Nuclear Detection (PRND) community uses instruments to detect and identify radiological material. • Instruments are tested against requirements established in consensus standards. • Test setups and measurement and test equipment (M&TE) used at different test facilities can make a...

Modeling inter-signal arrival times for accurate detection of CAN bus signal injection attacks

Modern vehicles rely on hundreds of on-board electronic control units (ECUs) communicating over in-vehicle networks. As external interfaces to the car control networks (such as the on-board diagnostic (OBD) port, auxiliary media ports, etc.) become common, and vehicle-to-vehicle / vehicle-to-infrastructure technology...

Restoring auditory cortex plasticity in adult mice by restricting thalamic adenosine signaling

Journal: Science

Circuits in the auditory cortex are highly susceptible to acoustic influences during an early postnatal critical period. The auditory cortex selectively expands neural representations of enriched acoustic stimuli, a process important for human language acquisition. Adults lack this plasticity. Here we show in the...

Characterization and simulation of soft gamma-ray mirrors for their use with spent fuel rods at reprocessing facilities

Journal: Applied Optics

The use of a grazing incidence optic to selectively reflect K-shell fluorescence emission and isotope-specific lines from special nuclear materials is a highly desirable nondestructive analysis method for use in reprocessing fuel environments. Preliminary measurements have been performed, and a simulation suite has...

Multi-spectral Infrared Computed Tomography

Journal: Proceedings, Electronic Imaging conference

Precise measurement of spatial gas concentrations in an uncontrolled outdoor environment is needed for environmental studies. In this effort, a multispectral imaging system has been developed incorporating quantum cascade laser (QCL) modules with an iterative computed tomography algorithm to sense a transmission...

Electric Grid Expansion Planning with High Levels of Variable Generation

Journal: ORNL Report

Renewables are taking a large proportion of generation capacity in U.S. power grids. As their randomness has increasing influence on power system operation, it is necessary to consider their impact on system expansion planning. To this end, this project studies the generation and transmission expansion co-optimization...

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