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Article
Virtual node graph neural network for full phonon prediction
Understanding the structure–property relationship is crucial for designing materials with desired properties. The past few years have witnessed remarkable progress in machine-learning methods for this connecti...
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Article
Open AccessMap** the pathways of photo-induced ion migration in organic-inorganic hybrid halide perovskites
Organic-inorganic hybrid perovskites exhibiting exceptional photovoltaic and optoelectronic properties are of fundamental and practical interest, owing to their tunability and low manufacturing cost. For pract...
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Article
Heavy-Head Sampling for Fast Imitation Learning of Machine Learning Based Combinatorial Auction Solver
The winner determination problem of a combinatorial auction can be modeled as mixed-integer linear programming, and is a popular benchmark to evaluate modern solvers. Recent advancements in combinatorial optim...
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Article
A gradient-based neural network accelerated for vision-based control of an RCM-constrained surgical endoscope robot
This paper presents an accelerated gradient-based neural network (GNN) to achieve visual servoing of a surgical endoscope robot. A KUKA LWR 4+ robot with seven joints is used to serve as an endoscope holder. K...
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Article
Prescribed-time convergent and noise-tolerant Z-type neural dynamics for calculating time-dependent quadratic programming
Neural-dynamics methods for solving quadratic programming (QP) have been studied for decades. The main feature of a neural-dynamics solver is that it can generate a continuous path from the initial point, and ...
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Article
Discrete-time noise-tolerant Zhang neural network for dynamic matrix pseudoinversion
In this work, a discrete-time noise-tolerant Zhang neural network (DTNTZNN) model is proposed, developed, and investigated for dynamic matrix pseudoinversion. Theoretical analyses show that the proposed DTNTZN...
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Article
Scanning ultrafast electron microscopy: Four-dimensional imaging of materials dynamics in space and time
Conventional electron microscopy during the last three decades has experienced tremendous developments, especially in equipment design and engineering, to become one of the most widely recognized and powerful ...
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Article
Open AccessLarge thermoelectric power factor from crystal symmetry-protected non-bonding orbital in half-Heuslers
Modern society relies on high charge mobility for efficient energy production and fast information technologies. The power factor of a material—the combination of electrical conductivity and Seebeck coefficien...
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Article
Photo-excited hot carrier dynamics in hydrogenated amorphous silicon imaged by 4D electron microscopy
Scanning ultrafast electron microscopy provides new insights into hot carrier dynamics in amorphous semiconductors.
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Article
Control of pendulum tracking (including swinging up) of IPC system using zeroing-gradient method
The pendulum control of the inverted-pendulum-on-a-cart (IPC) system is one of the most important issues in nonlinear control theory and has been widely investigated. Nevertheless, the control of pendulum trac...
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Chapter and Conference Paper
An Arctan-Activated WASD Neural Network Approach to the Prediction of Dow Jones Industrial Average
Accurate prediction of the stock market index is a very challenging task due to the highly nonlinear characteristic of financial time series. For this reason, a single hidden-layer feed-forward neural network,...
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Chapter and Conference Paper
A Complex Gradient Neural Dynamics for Fast Complex Matrix Inversion
Complex-valued matrix inversion problem is investigated by using the gradient-neural-dynamic method. Differing from the traditional processing method (only for real-valued matrix inversion), the proposed metho...
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Article
Open AccessEntropic and Near-Field Improvements of Thermoradiative Cells
A p-n junction maintained at above ambient temperature can work as a heat engine, converting some of the supplied heat into electricity and rejecting entropy by interband emission. Such thermoradiative cells h...
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Article
Open AccessPhoto-excited charge carriers suppress sub-terahertz phonon mode in silicon at room temperature
There is a growing interest in the mode-by-mode understanding of electron and phonon transport for improving energy conversion technologies, such as thermoelectrics and photovoltaics. Whereas remarkable progre...
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Article
Nanocomposites for thermoelectrics and thermal engineering
The making of composites has served as a working principle of achieving material properties beyond those of their homogeneous counterparts. The classical effective-medium theory models the constituent phases w...
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Chapter and Conference Paper
A Fully Complex-Valued Neural Network for Rapid Solution of Complex-Valued Systems of Linear Equations
In this paper, online solution of complex-valued systems of linear equations is investigated in the complex domain. Different from the conventional real-valued neural network, which is only designed for real-v...
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Article
On exponential convergence of nonlinear gradient dynamics system with application to square root finding
Gradient dynamics systems and their exponential convergence theories are investigated in this paper. Differing from widely considered linear gradient dynamics system (LGDS), a class of nonlinear gradient dynam...
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Article
Analysis and Verification of Repetitive Motion Planning and Feedback Control for Omnidirectional Mobile Manipulator Robotic Systems
Mobile manipulator robotic systems (MMRSs) composed of a manipulator and a mobile platform are investigated in this paper. In order for the mobile manipulator robotic system (MMRS) to return to its initial sta...
