A5052847917- Fluid Dynamics and Thin Films
- Advanced Mathematical Modeling in Engineering
- Differential Equations and Numerical Methods
- Mathematical Biology Tumor Growth
- Stock Market Forecasting Methods
- Blockchain Technology Applications and Security
- Mycorrhizal Fungi and Plant Interactions
- Stability and Controllability of Differential Equations
- Cellular Mechanics and Interactions
- Energy, Environment, Economic Growth
- Navier-Stokes equation solutions
- Regional Development and Environment
- Solidification and crystal growth phenomena
- Soil Carbon and Nitrogen Dynamics
- Fluid Dynamics and Turbulent Flows
- Forecasting Techniques and Applications
- Advanced Mathematical Physics Problems
- Environmental Impact and Sustainability
- Energy Load and Power Forecasting
- Data Stream Mining Techniques
- Ecology and Vegetation Dynamics Studies
- Ecosystem dynamics and resilience
- Plant Parasitism and Resistance
- Gene Regulatory Network Analysis
- Tree Root and Stability Studies
Changchun University
2011-2025
Institute of Botany
2025
University of Chinese Academy of Sciences
2025
Beijing Botanical Garden
2025
Jilin University
2013-2024
Center for High Pressure Science & Technology Advanced Research
2024
University of Ottawa
2019-2020
Northeast Institute of Geography and Agroecology
2019
Dalian Jiaotong University
2015
Ammonia (NH3) is the most prevalent alkaline gas in atmosphere, with its elevated concentrations posing significant adverse impacts on air quality, ecosystems, and human health across diverse spatial temporal scales. Given ongoing global change intensified anthropogenic NH3 emissions, it projected that surface concentration will escalate further. Here, based ground observations, gridded data of organic inorganic nitrogen fertilizer applications, meteorological data, ancillary information, we...
ABSTRACT Shrub encroachment significantly impacts biodiversity and ecosystem functions in grassland ecosystems. Soil microbial communities may play a key role this process. Previous studies have focused on plant competition soil abiotic factors, but the specific biological mechanisms by which microbiota drive shrub remained poorly understood. Through integrated vegetation surveys high‐throughput sequencing of across gradients Inner Mongolia, we assessed composition functional genes...
Bitcoin is one of the most successful cryptocurrencies, and research on price predictions receiving more attention. To predict fluctuations better effectively, it necessary to establish a abundant index system prediction model with effect. In this study, combined twin support vector regression was used as main model. Twenty-seven factors related prices were collected. Some that have greatest impact selected by using XGBoost algorithm random forest algorithm. The (SVR), least-squares (LSSVR),...
Accurately predicting the price of carbon is an effective way ensuring stability trading market and reducing emissions. Aiming at non-smooth non-linear characteristics price, this paper proposes a novel hybrid prediction model based on improved feature extraction integration, which built complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN), fuzzy entropy (FuzzyEn), random forest using particle swarm optimisation (PSORF), extreme learning machine (ELM), long short-term...
Bitcoin is one of the most successful cryptocurrencies, and research on price prediction getting more attention. Previous studies have used traditional statistical methods machine learning models to predict prices. However, previous also many problems, such as too few influencing factors, lack model optimization, poor effect. This paper selects 27 factors related changes screens features through XGBoost algorithm Random Forest (RF). In this study, combined forecasting based Support Vector...
This paper concerns the approximate controllability of a class systems governed by coupled degenerate equations. The equations may be weakly and strongly on boundary. It is shown that are approximately controllable constructing controls via conjugate problems.
The optimal control problems of degenerate parabolic equations have many applications in economics, physics, climatology, and so on. Motivated by the applications, we consider a class nonlinear this paper. main result is that deduce first order necessary condition for problem variation method. Moreover, investigate uniqueness solutions to problems. For linear equations, obtain global uniqueness, while only local uniqueness. Finally, give numerical example validate theoretical results.
Comprehensively clarifying the influencing factors of carbon emissions is crucial to realizing emission reduction targets in China. To address this issue, paper develops a four-level factor system from six perspectives: population, economy, energy, water resources, main pollutants, and afforestation. analyze how these affect emissions, we propose an improved partial least squares structural equation model (PLS-SEM) based on random forest (RF), named RF-PLS-SEM. In addition, entropy weight...
The quality of graduate students is one the most important aspects that affect education. This research builds a system evaluation for by using Pearson Correlation Coefficient. indicators are empowered basing on entropy weight method, and candidates ranked according to TOPSIS RSR model. difference between two models not noticeable, sorting outcomes superior, comparing results. We apply these study in Changchun University, we obtain conclusion literature, law economics best among all...
This paper is devoted to studying the long time behavior of solutions a bipolar quantum hydrodynamic in one-dimensional space for general pressure functions. The model usually applied simulate some effects semiconductor devices. decay rate variable obtained by entropy functional method and semidiscrete technique.
This paper deals with the global existence of solutions to a strongly coupled parabolic-parabolic system chemotaxis arising from theory reinforced random walks. More specifically, we investigate attraction-repulsion model fast diffusive term and nonlinear source subject Neumann boundary conditions. Such diffusion guarantees for any given initial value in bounded domain. Our main results are based on method energy estimates, where key estimates obtained by technique originating Moser’s...
In this paper, we establish the existence of viscous shock waves solutions a quasi-linear hyperbolic-parabolic system arising from chemotaxis by using Lyapunov stability techniques. Different T.L. and Z.A. Wang [12], consider that chemosensitivity constant kinetic have same sign. Furthermore, show left-hand right-hand states Lax correspond to saddle nodes.
The paper investigates a thin film equation with second-order diffusion term: ut + (unuxxx)x − (umux)x = 0 which has many important applications in biomedicine, biology and physics. For m > n 1, the solution also converges to its mean at an exponential rate as time.
In recent years, people begin to concern all kinds of mathematical models for the ultra-small semiconductor systems in physics and quantum theory. Those include macroscope microscope models. The model, which deals with technology, involves Wigner Equation, Shrodinger-Poinsson Equation etc. so-called hydrodynamic model (QHD) includs physical quantities like electron density current it is used device such as resonance diode. Thus QHD has played an important role fields. This paper concerned a...
This paper establishes the existence of a nontrivial steady-state solution to parabolic-parabolic coupled system with singular (or logarithmic) sensitivity and nonlinear source arising from chemotaxis. The proofs mainly rely on maximum principle, implicit function theorem, Hopf bifurcation theorem.