Results 91 to 100 of about 742,320 (261)

Mathematical Analysis and Simulations of a Cancer Model With Interleukins and Delayed Immunotherapy

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT A new system of delayed differential equations for tumor‐immune system interactions is proposed and studied. The system describes the interactions between tumor cells and the immune system at the most aggressive phase of cancer, where tumor cells have developed mechanisms from earlier stages to evade immune responses.
Laid Boudjellal, Ana Jacinta Soares, Maria Joana Torres   +2 more
wiley   +1 more source

Universal Projective Synchronization of Two Different Hyperchaotic Systems with Unknown Parameters

Journal of Applied Mathematics, 2014
Universal projective synchronization (UPS) of two chaotic systems is defined. Based on the Lyapunov stability theory, an adaptive control method is derived such that UPS of two different hyperchaotic systems with unknown parameters is realized, which is ...
Baojie Zhang, Hongxing Li
doaj   +1 more source

A Fast Algorithm for Sparse Controller Design [PDF]

, 2013
We consider the task of designing sparse control laws for large-scale systems by directly minimizing an infinite horizon quadratic cost with an $\ell_1$ penalty on the feedback controller gains.
Kolter, J. Zico, Wytock, Matt
core  

Finite‐Time Disturbance Observer‐Based Nonlinear Robust Adaptive Control of Hydraulic Manipulator With Parameter Identification

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Hydraulic manipulators exhibit strong coupling, pronounced nonlinearities, and significant modeling uncertainties, which hinder high‐precision motion control. This paper proposes a finite‐time disturbance observer–based nonlinear robust adaptive control (RAC‐FTDO) framework enhanced by a physically consistent dynamic parameter identification ...
Tianyu Gao, Xianglong Liang, Wenxiang Deng, Jianyong Yao   +3 more
wiley   +1 more source

Adaptive Event-Triggered Bipartite Consensus of Matrix-Weighted Linear Multi-Agent Systems

IEEE Access
In this paper, adaptive event-triggered bipartite consensus is investigated for matrix-weighted linear leader-following multi-agent systems. The matrix weights characterize the dependencies among the high-dimensional states of neighboring agents.
Yanting Huang, Guohua Zhang, Chen Liu, Rongqiang Zhang   +3 more
doaj   +1 more source

A Comprehensive Multistage Average Controller for Trajectory Tracking in Solar‐Powered Mobile Robots: Analysis of Actuator‐Driver and Power Stage Integration

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT This work addresses the challenge of bidirectional trajectory tracking in solar‐powered wheeled mobile robots (WMRs), considering the mechanical structure, actuator‐driver, and power stage subsystems. Notably, this is the first study to explicitly model and control the actuator‐driver subsystem within this context. The proposed solution relies
Benjamin Natanael Santiago‐Nogales, Julio Cesar Ordaz‐Dehesa, Ramón Silva‐Ortigoza, Erik Reyes‐Reyes, J. Martín Alba‐Martínez, Juan Eduardo Velázquez‐Velázquez, José Rafael García‐Sánchez, Magdalena Marciano‐Melchor, Hind Taud   +8 more
wiley   +1 more source

A pilot variational coupled reanalysis based on the CESAM climate model

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Variational data assimilation of in‐situ and satellite ocean data and reanalysis atmospheric data into an intermediate complexity Earth system model is possible by adjusting the surface fluxes and internal model parameters. This pilot application requires nearly complete information on the atmospheric state for synchronization.
Armin Köhl, Iuliia Polkova, Guokun Lyu, Frank Lunkeit, Abhirup Banerjee, Silke Schubert, Detlef Stammer   +6 more
wiley   +1 more source

Estimation of the Attraction Domain for the Quantum Systems Based on the Schrödinger Equation

Axioms
This paper investigates a quantum system described by the Schrödinger equation, utilizing the concept of the quantum Lyapunov function. The Lyapunov function is chosen based on the mean value of a virtual mechanical quantity, where different values of P,
Hongli Yang, Guohui Yu, Ivan Ganchev Ivanov   +2 more
doaj   +1 more source

Qualitative Analysis of Nonlinear Systems by the Method of Matrix Lyapunov Functions

Rocky Mountain Journal of Mathematics, 1995
The author studies the system (1) \(x'= f(t, x)\) on a domain in \(\mathbb{R}^n\). He develops the notion of a matrix Lyapunov function as a natural generalization of ordinary scalar and vector Lyapunov functions. The main application is to give sufficient conditions for the asymptotic stability of the origin for a large class of equations which are ...
openaire   +2 more sources

Predictability of North Pacific blocking events: Analogue‐based analysis of historical MIROC6 simulations

Quarterly Journal of the Royal Meteorological Society, EarlyView.
The predictability of western and eastern North Pacific blocking events is assessed using analogue‐based diagnostics. Eastern blocks exhibit lower predictability, characterized by faster error growth and higher mean logarithmic divergence rates. The study highlights geographical contrasts in blocking stability.
Anupama K. Xavier, Oisín Hamilton, Davide Faranda, Stéphane Vannitsem   +3 more
wiley   +1 more source