A5083263981- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Advanced Differential Equations and Dynamical Systems
- Quantum chaos and dynamical systems
- Chaos control and synchronization
- Lipid metabolism and biosynthesis
- Perovskite Materials and Applications
- Adversarial Robustness in Machine Learning
- Polynomial and algebraic computation
- Mathematical and Theoretical Epidemiology and Ecology Models
- Nonlinear Dynamics and Pattern Formation
- Advanced Neural Network Applications
- Quantum Dots Synthesis And Properties
- Computational Fluid Dynamics and Aerodynamics
- Mathematical Dynamics and Fractals
- Conducting polymers and applications
- Crystallography and molecular interactions
- Energy Efficient Wireless Sensor Networks
- Matrix Theory and Algorithms
- Cooperative Communication and Network Coding
- Text and Document Classification Technologies
- Anomaly Detection Techniques and Applications
- Chalcogenide Semiconductor Thin Films
- Numerical methods for differential equations
- Advanced Optimization Algorithms Research
University of Hong Kong
2023-2024
Beihang University
2015-2024
Hong Kong University of Science and Technology
2023
Ji Hua Laboratory
2022
Nanchang University
2021-2022
Courant Institute of Mathematical Sciences
2019-2021
New York University
2019-2020
Shandong University
2020
Ministry Of Health
2017
North China University of Water Resources and Electric Power
2016
Distilled student models in teacher-student architectures are widely considered for computational-effective deployment real-time applications and edge devices. However, there is a higher risk of to encounter adversarial attacks at the edge. Popular enhancing schemes such as training have limited performance on compressed networks. Thus, recent studies concern about distillation (AD) that aims inherit not only prediction accuracy but also robustness robust teacher model under paradigm...
We report a new p-doping strategy for organic semiconductors with free radicals that enable reproducible enhancement in the conductivity and tuning of work function. High efficiency thermo-stability perovskite solar cells were achieved.
This paper is devoted to local bifurcations of three-dimensional (3D) quadratic jerk system. First, we start by analysing the saddle-node bifurcation. Then introduce concept canonical Next, study transcritial bifurcation Finally zero-Hopf system, which constitutes core contributions this paper. By averaging theory first order, prove that, at most, one limit cycle bifurcates from equilibrium. second third and fourth show two cycles bifurcate Overall, can help increase our understanding...
Upscaling and stabilizing efficient wide‐bandgap perovskite solar cells (PSCs) are critical for the commercialization of tandem photovoltaics. Herein, solvent engineering is applied scalable deposition (≈1.72 eV) by introduction N ‐methyl‐2‐pyrrolidone (NMP) additives, which enables compact phase‐stable FA 0.83 Cs 0.17 Pb(I 0.7 Br 0.3 ) 3 even without use antisolvent. By further passivation with a 2‐thiophenemethylammonium bromide (2‐ThMABr)‐based quasi‐2D ( n = 2 on surface 3D perovskite,...
The unsteady effects in the shock tunnel flow establishment can aid hypersonic inlet starting. An unself-starting may be started initial operation. To confirm self-starting ability tunnel, a new test method has been developed. It adopts light obstacle to choke for unstarting at stage of then fast blown out determine whether will restarted under steady conditions. Shutterlike response is required blockage generated by because short duration tunnel. With help shutter-like obstacle, could...
In wireless sensor networks, in order to satisfy the requirement of long working time energy-limited nodes, we need design an energy-efficient and lifetime-extended medium access control (MAC) protocol. this paper, a node cooperation mechanism that one or multiple nodes with higher channel gain sufficient residual energy help sender relay its data packets recipient is employed achieve objective. We first propose transmission power optimization algorithm prolong network lifetime by optimizing...
This paper presents an algebraic criterion for determining whether all the zeros of a given polynomial are outside unit circle in complex plane. is used to deduce critical conditions occurrence chaos multidimensional discrete dynamical systems based on modified Marotto’s theorem developed by Li and Chen (called “Marotto–Li–Chen theorem”). Using these we reduce problem analyzing induced snapback repeller problem, propose algorithmic approach solve this means symbolic computation. The proposed...
The classical theory of Kosambi-Cartan-Chern (KCC) developed in differential geometry provides a powerful method for analyzing the behaviors dynamical systems. In KCC theory, properties system are described terms five geometrical invariants, which second corresponds to so-called Jacobi stability system. Different from that Lyapunov has been studied extensively literature, analysis investigated more recently using concepts and tools. It turns out existing work on remains theoretical problem...
Abstract Since Kopel's duopoly model was proposed about three decades ago, there are almost no analytical results on the equilibria and their stability in asymmetric case. The first objective of our study is to fill this gap. This paper analyzes Kopel analytically by using several tools based symbolic computations. We discuss possibility existence multiple positive establish necessary sufficient conditions for a given number exist. possible positions also explored. Furthermore, Kopel, if...
This paper presents the characterization of transonic stationary solutions for hydrodynamic escape problem (HEP), which is an important issue in study evolution planetary atmospheres. The HEP involve effects gravity, heat, and conduction, are based reality this sonic points singular time independent model. established by geometric perturbation method on adiabatic wind solution HEP. existence nonexistence with or without heat effect has been explored. smooth under conduction verified...
This paper deals with the bifurcation of limit cycles for a quintic system one center. Using averaging method, we explain how can bifurcate from periodic annulus around center considered by adding perturbed terms which are sum homogeneous polynomials degree [Formula: see text] text]. We show that up to first-order averaging, at most five period unperturbed text], any and upper bound is sharp
This paper presents new results on the bifurcation of medium and small limit cycles from periodic orbits surrounding a cubic center or that have rational first integral degree 2 respectively, when they are perturbed inside class all discontinuous piecewise polynomial differential systems with straight line discontinuity y = 0.We obtain maximum number can bifurcate is 9 using order averaging method, appear in Hopf at 6 fifth method.Moreover, both numbers be reached by analyzing simple zeros...
This paper comes up with the adaptive prediction method of Volterra series in chaotic time based on matrix factorization method. Taking monthly runoff Huaxian Hydrological Station as example, phase-space reconstruction, it identifies characteristic through correlation dimension and Lyapunov index. Based filter model, use to solve equation, which avoid local optimum problem caused by selecting initial value Normalized Least Mean Square (NLMS), at same time, obtain global optimal coefficient....
This paper deals with the analytical solutions for two models of special interest in mathematical physics, namely $(2+1)$ -dimensional generalized Calogero-Bogoyavlenskii-Schiff equation and $(3+1)$ Boiti-Leon-Manna-Pempinelli equation. Using a modified version Fan sub-equation method, more new exact traveling wave including triangular solutions, hyperbolic function Jacobi Weierstrass elliptic have been obtained by taking full advantage extended general equation, showing that method is an...
In this article, we study the maximum number of limit cycles for two classes planar polynomial differential systems with uniform isochronous centers. Using first-order averaging method, analyze how many can bifurcate from period solutions surrounding centers considered when they are perturbed inside class homogeneous same degree. We show that cycles, <i>m</i> and <i>m</i>+1, degree 2<i>m</i> 2<i>m</i>+1, respectively. Both bounds be reached all <i>m</i>.