Electrical and Computer Engineering

Works Published in 2021

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Displaying works 341 - 360 of 511 in total

Sorted by most recent date added to the index first, which may not be the same as publication date order.

2021 journal article

Domains of electrically induced valley polarization in two-dimensional Dirac semiconductors

PHYSICAL REVIEW B, 104(7).

Source: Web Of Science
Added: August 16, 2021

2021 journal article

Channel Prediction for mmWave Ground-to-Air Propagation Under Blockage

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 20(8), 1364–1368.

By: W. Khawaja*, O. Ozdemir* & I. Guvenc*

author keywords: Trajectory; Unmanned aerial vehicles; Predictive models; Azimuth; Receivers; Prediction algorithms; Forecasting; Blockage; channel prediction; millimeter wave (mmWave); unmanned aerial vehicle (UAV)
TL;DR: A novel method of channel prediction during the GA link blockage at 28 GHz is provided, and results obtained from ray-tracing simulations indicate a close match between the actual and the predicted mmWave channel. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 16, 2021

2021 article

Analyzing Secure Memory Architecture for GPUs

2021 IEEE INTERNATIONAL SYMPOSIUM ON PERFORMANCE ANALYSIS OF SYSTEMS AND SOFTWARE (ISPASS 2021), pp. 59–69.

By: S. Yuan n, A. Yudha*, Y. Solihin* & H. Zhou n

author keywords: GPUs; security; secure memory; memory encryption; memory integrity; metadata cache
TL;DR: It is shown that the massive-threaded nature of GPUs make them latency-tolerant and the performance impact due to the extra encryption/decryption latency is limited, and direct encryption can be a promising alternative for GPU secure memory. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 16, 2021

2021 journal article

EFFICIENT ALGORITHMS FOR EIGENSYSTEM REALIZATION USING RANDOMIZED SVD

SIAM JOURNAL ON MATRIX ANALYSIS AND APPLICATIONS, 42(2), 1045–1072.

By: R. Minster, A. Saibaba*, J. Kar* & A. Chakrabortty*

author keywords: eigensystem realization algorithm; system identification; singular value decomposition; randomized algorithms
TL;DR: Computationally efficient algorithms for reducing the computational cost of the SVD step by using randomized subspace iteration and exploiting the block Hankel structure of the matrix are developed. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 16, 2021

2021 journal article

An X-Band Code-Modulated Interferometric Imager

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 69(11), 4856–4868.

By: V. Chauhan n, Z. Hong n, S. Schoenherr & B. Floyd n

Contributors: V. Chauhan n, Z. Hong n, S. Schonherr n & B. Floyd n

author keywords: Code modulation; imaging; interferometry; millimeter wave (mmWave); phased arrays; X-band
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 16, 2021

2021 article

Impedance-Based Stability Analysis of a Single-Phase Community Microgrid in Islanded Mode

2021 IEEE POWER & ENERGY SOCIETY INNOVATIVE SMART GRID TECHNOLOGIES CONFERENCE (ISGT).

By: K. Chen n & M. Baran n

author keywords: generalized Nyquist stability criterion (GNC); impedance modeling; inverter; microgrids; small-signal stability
TL;DR: The impedance-based stability analysis is applied to assess the stability of a single-phase community microgrid in islanded mode and suggests the need for more robust DER interface design and DER control to maintain the microgrid stability. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 9, 2021

2021 journal article

Design and Fabrication of Wideband Air-Coupled Capacitive Micromachined Ultrasonic Transducers With Varying Width Annular-Ring and Spiral Cell Structures

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, 68(8), 2749–2759.

By: O. Adelegan n, Z. Coutant n, X. Wu n, F. Yamaner n & O. Oralkan n

author keywords: Annular; anodic bonding process; capacitive micromachined ultrasonic transducer (CMUT); glass substrate; spiral
TL;DR: A design strategy and fabrication process for developing improved concentric annular- and novel spiral-shaped capacitive micromachined ultrasonic transducers that can generate high output pressure and provide wide bandwidth in air are presented. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 9, 2021

2021 article

Segmented Rotor Mutually Coupled Switched Reluctance Machine for Low Torque Ripple Applications

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, Vol. 57, pp. 3582–3594.

author keywords: Rotors; Torque; Torque measurement; Windings; Conductors; Reluctance motors; Couplings; Concentrated winding; flux barrier; mutually coupled switched reluctance motor (MCSRM); rotor shaping; segmented rotor; switched reluctance motor (SRM); torque ripple
TL;DR: A novel segmented-rotor, fractional-slot, tooth-wound MCSRM with notched rotor design is presented, which has very low torque ripple compared to other machine types in the SRM family. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 2, 2021

2021 journal article

Model-based and model-free designs for an extended continuous-time LQR with exogenous inputs

SYSTEMS & CONTROL LETTERS, 154.

author keywords: Linear quadratic regulator; Exogenous inputs; Matrix differential equations; Reinforcement learning
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 2, 2021

2021 journal article

Power Scalable Angle of Arrival Estimation Using Pilot Design With Orthogonal Subsequences

IEEE OPEN JOURNAL OF THE COMMUNICATIONS SOCIETY, 2, 1690–1709.

By: M. Ullah*, A. Tewfik* & R. Heath n

author keywords: AoA estimation; digital receiver; mmWave; pilot design; scalable power
TL;DR: This paper presents a variable rate sub-Nyquist decoupling solution that leverages pilot design and indicates some other benefits of the decoupled, including reduced complexity algorithm implementation and improved performance estimation for the non maximum likelihood estimators. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 2, 2021

2021 article

Anomalous Thermoelectric Transport Properties of Fe-Rich Magnetic FeTe

Polash, M. M. H., & Vashaee, D. (2021, August 1). PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS, Vol. 15.

By: M. Polash n & D. Vashaee n

author keywords: FeTe; magnon drags; phonon drags; spin-driven thermoelectrics; transition-metal chalcogenides
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 2, 2021

2021 journal article

Real-time monitoring of plant stresses via chemiresistive profiling of leaf volatiles by a wearable sensor

MATTER, 4(7), 2553–2570.

TL;DR: A leaf-attachable chemiresistive sensor array for real-time fingerprinting of volatile organic compounds (VOCs) that permits noninvasive and early diagnosis of plant diseases, such as late blight caused by Phytophthora infestans is reported. (via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions (OpenAlex)
Source: Web Of Science
Added: July 26, 2021

2021 article

UV illumination effects on AlGaN/GaN HEMTs for tunable RF oscillators

2021 IEEE RADIO AND WIRELESS SYMPOSIUM (RWS), pp. 168–170.

By: S. Stein n, M. Robbins n, P. Reddy*, R. Collazo n & S. Pavlidis n

author keywords: AlGaN/GaN HEMTs; Optical Control; Illumination Effects; Oscillator
TL;DR: This is the first investigation of AlGaN/GaN HEMTs as optically-controlled microwave semiconductor devices for use in next-generation, high-power microwave photonics systems and measures show a modest change in S21 in the presence of UV illumination that induces internal photoconductive and photovoltaic effects. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: July 26, 2021

2021 article

IEEE ACCESS SPECIAL SECTION EDITORIAL: ENERGY HARVESTING TECHNOLOGIES FOR WEARABLE AND IMPLANTABLE DEVICES

IEEE ACCESS, Vol. 9, pp. 91324–91327.

Source: Web Of Science
Added: July 26, 2021

2021 journal article

Deep Transfer Learning for Site-Specific Channel Estimation in Low-Resolution mmWave MIMO

IEEE WIRELESS COMMUNICATIONS LETTERS, 10(7), 1424–1428.

By: W. Alves*, I. Correa*, N. Gonzalez-Prelcic n & A. Klautau*

author keywords: Deep learning; deep transfer learning; channel estimation; mmWave; quantized MIMO
TL;DR: The problem of channel estimation in low-resolution multiple-input multiple-output MIMO systems operating at millimeter wave (mmWave) is considered and a deep transfer learning (DTL) approach is presented that exploits previously trained models to speed up site adaptation. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: July 26, 2021

2021 article

Relaxed Peephole Optimization: A Novel Compiler Optimization for Quantum Circuits

CGO '21: PROCEEDINGS OF THE 2021 IEEE/ACM INTERNATIONAL SYMPOSIUM ON CODE GENERATION AND OPTIMIZATION (CGO), pp. 301–314.

By: J. Liu n, L. Bello* & H. Zhou n

author keywords: quantum computing; peephole optimization
TL;DR: A novel quantum compiler optimization, named relaxed peephole optimization (RPO) for quantum computers, which leverages the single-qubit state information that can be determined statically by the compiler and extends the approach to optimize the quantum gates when some input qubits are in known pure states. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: July 26, 2021

2021 journal article

An Active Voltage Stabilizer for a DC Microgrid System

IEEE ACCESS, 9, 86786–86800.

Contributors: V. Iyer*, S. Gulur*, S. Bhattacharya n, J. Kikuchi*, S. Sridharan*, K. Zou*, C. Chen*

author keywords: Voltage control; Microgrids; Impedance; Load modeling; Control systems; Stability criteria; Power system stability; Active stabilizer; DC microgrid; dual active bridge (DAB); energy storage; impedance emulation; small signal modeling; small signal impedance; stability
TL;DR: This paper analyzes the low-frequency stability challenges that exist in a complex DC microgrid (MG) system and proposes a hardware-based active voltage stabilizer solution that involves only local voltage sensing and are non-intrusive. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: July 26, 2021

2021 article

Stealth-Persist: Architectural Support for Persistent Applications in Hybrid Memory Systems

2021 27TH IEEE INTERNATIONAL SYMPOSIUM ON HIGH-PERFORMANCE COMPUTER ARCHITECTURE (HPCA 2021), pp. 139–152.

By: M. Alwadi*, V. Kommareddy*, C. Hughes*, S. Hammond* & A. Awad n

author keywords: persistent applications; hybrid memories
TL;DR: Stealth-Persist is proposed, a novel architecture support feature that allows applications that need persistence to run in the DRAM while maintaining the persistency features provided by the NVM, and creates the illusion of a persistent memory for the application to use, while utilizing theDRAM for performance optimizations. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: July 26, 2021

2021 article

DeACT: Architecture-Aware Virtual Memory Support for Fabric Attached Memory Systems

2021 27TH IEEE INTERNATIONAL SYMPOSIUM ON HIGH-PERFORMANCE COMPUTER ARCHITECTURE (HPCA 2021), pp. 453–466.

By: V. Kommareddy*, C. Hughes*, S. Hammond* & A. Awad n

author keywords: disaggregated fabric attached memory systems; virtual memory; security
Source: Web Of Science
Added: July 26, 2021

2021 article

BBB: Simplifying Persistent Programming using Battery-Backed Buffers

2021 27TH IEEE INTERNATIONAL SYMPOSIUM ON HIGH-PERFORMANCE COMPUTER ARCHITECTURE (HPCA 2021), pp. 111–124.

By: M. Alshboul n, P. Ramrakhyani*, W. Wang*, J. Tuck n & Y. Solihin*

TL;DR: BBB simplifies persistent programming as the programmer does not need to insert persist barriers or flushes, and achieves nearly identical results to eADR in terms of performance and number of NVMM writes, while requiring two orders of magnitude smaller energy and time to drain. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: July 26, 2021

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