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Mathematics
Fractional Order
100%
Time Delay
95%
Stochastics
54%
Delay-Differential Equation
54%
Differential Model
52%
Mathematical Modeling
51%
Numerical Simulation
45%
Hopf Bifurcation
38%
Optimal Control Theory
31%
Biological System
21%
Optimal Control Problem
18%
Asymptotic Stability
17%
Reproduction Number
17%
Incidence Rate
16%
Global Dynamics
15%
Sufficient Condition
15%
Differential Equation
14%
Equilibrium Point
13%
Deterministic Model
13%
Parameter Estimation
13%
Free Equilibrium
13%
Fractional Order Derivative
12%
Stability Analysis
12%
Predator-Prey System
11%
Ordinary Differential Equation
11%
Numerical Solution
9%
Numerical Methods
9%
Endemic Equilibrium
9%
Random Noise
9%
Partial Differential Equation
9%
Dynamical System
8%
Control Parameter
8%
Numerical Example
8%
Boundedness
8%
Reaction-Diffusion System
7%
Genetic Regulatory Network
7%
Stochastic Differential Equation
7%
Control Function
7%
Complex Networks
7%
Infection Rate
7%
Treatment Strategy
7%
Disease Dynamic
7%
Fractional Differential Equations
7%
Positive Solution
6%
Life Cycle
6%
Experimental Data
5%
Susceptibles
5%
Discrete Time
5%
Finite Time
5%
Equilibrium Solution
5%
Integer
5%
Numerical Approach
5%
Fixed-Time Stability
5%
Periodic Solution
5%
Response Function
5%
Nonlinearities
5%
Initial Condition
5%
Direct Method
5%
Minimizes
5%
Keyphrases
Delay Differential Equations
27%
Delay Differential Model
20%
Time Delay
14%
Fractional Order Delay
12%
Stability Analysis
11%
Numerical Simulation
10%
Optimal Control
9%
Fractional-order Model
9%
Fractional Order
9%
Sensitivity Analysis
8%
Volterra Delay-integro-differential Equation
7%
Allee Effect
7%
Glucose-insulin System
7%
Dynamical Analysis
7%
COVID-19 Infection
7%
Lyapunov Function
7%
Intracellular Delay
6%
Parameter Estimation
6%
Bioscience
6%
Tumor-immune System
6%
Numerical Treatment
6%
Coronavirus COVID-19
5%
Hepatitis C Virus Replication
5%
Cellular Interactions
5%
Interaction Delay
5%
Neutral Delay Differential Equations
5%
System Memory
5%
Tumor Cells
5%
Tumor-immune Interaction
5%
Optimal Control Problem
5%
Differential Equations
5%
Bifurcation Analysis
5%
Immune System
5%
Predator-prey Interactions
5%
Coronavirus Infections
5%
Effector Cells
5%
Dynamical Behavior
5%
Delay Effects
5%
Backward Bifurcation
5%
Engineering
Differential Delay
54%
Fractional-Order
27%
Delay Time
23%
Sufficient Condition
15%
Computer Simulation
12%
Numerical Solution
12%
Pantograph
11%
Stability Analysis
9%
Hopf Bifurcation
9%
Biological System
8%
Complex Networks
7%
Sampled Data
7%
Equilibrium Point
6%
Discrete Time
6%
Stochastic Differential
5%
Numerical Technique
5%
Kutta Method
5%
