An observer for a nonlinear age-structured model of a harvested fish population by Diène Ngom, A. Iggidir, Aboudramane Guiro, Abderrahim Ouahbi

“…We consider an age-structured model of a harvested population.This model is a discrete-time system that includes a nonlinear stock-recruitmentrelationship. Our purpose is to estimate the stock state. …”
Get full text

Error Estimates on Hybridizable Discontinuous Galerkin Methods for Parabolic Equations with Nonlinear Coefficients by Minam Moon, Hyung Kyu Jun, Tay Suh

“…In a practical setting, PDE comes with nonlinear coefficients. Hence, it is inevitable to consider how to obtain an approximate solution for PDE with nonlinear coefficients. …”
Get full text

Observer-Based Bounded Control for Discrete Time-Delay Uncertain Nonlinear Systems by Bei Wu, Mou Chen, Xiaoming Chen

“…A bounded controller is proposed for a class of uncertain discrete time-delay systems with nonlinearity and disturbance based on state estimator and disturbance observer technique. …”
Get full text

Extended properties of nonlinear power system models that are symmetrically configured in the narrow sense by Elior Segev, Vladimir Zhuk, Elinor Ginzburg-Ganz, Juri Belikov, Yoash Levron

Get full text

NONLINEAR PRIMARY RESONANCE OF A CIRCULAR SANDWICH PLATE UNDER STATIC LOAD by GUO Wei, DU GuoJun, HU YuDa

“…Based on Reissner’s sandwich plate theory,the nonlinear dynamic equations of the circular sandwich plate under static load are established by using the Hamilton principle. …”
Get full text

About the Stability and Positivity of a Class of Discrete Nonlinear Systems of Difference Equations by M. De la Sen

“…This paper investigates stability conditions and positivity of the solutions of a coupled set of nonlinear difference equations under very generic conditions of the nonlinear real functions which are assumed to be bounded from below and nondecreasing. …”
Get full text

Monotone Iterative Solutions for Nonlinear Boundary Value Problems of Fractional Differential Equation by Chaozhu Hu, Bin Liu, Songfa Xie

“…By means of the method of quasi-lower and quasi-upper solutions and monotone iterative technique, we consider the nonlinear boundary value problems with Caputo fractional derivative and introduce two well-defined monotone sequences of quasi-lower and quasi-upper solutions which converge uniformly to the actual solution of the problem, and then the existence results of the solution for the problems are established. …”
Get full text

Inelastic Interaction and Blowup New Solutions of Nonlinear and Dispersive Long Gravity Waves by Haiyong Qin, Mostafa M. A. Khater, Raghda A. M. Attia

“…Moreover, it is used to study the interaction between nonlinear and dispersive long gravity waves. A new fractional operator is used to convert the fractional form of the BK system to a nonlinear ordinary differential system with an integer order. …”
Get full text

Sequential harmonic spin–orbit angular momentum generation in nonlinear optical crystals by Yutao Tang, Zixian Hu, Junhong Deng, Kingfai Li, Guixin Li

Subjects: Get full text

Fault Estimation Method for Nonlinear Systems With Perturbations Based on Augmented Fault Observer by Yanxiu Sun, Ying Du, Yuping Zhang

“…This paper proposes a robust fault estimation method for nonlinear systems with both actuator and sensor faults. …”
Get full text

UNCERTAINTY EVALUATION METHOD FOR NONLINEAR SYSTEM TEST BASED ON POLYNOMIAL CHAOS EXPANSION by YU HuiJie, ZHU YueChen, WANG HaiHua, WANG ShenLong, XU ShiPeng, DING XiaoHong

Subjects: Get full text

Nonlinear Buckling Analysis and Optimization Design of the Y-Type Composite Insulator String by Hua Bao, Lingzhi Xia, Shengcong Chai, Yang Cheng, Songyuan Cao, Zhiwen Lan

“…Using numerical simulation software, the nonlinear mechanical analysis of Y-type insulator strings is conducted, and under the action of different wind speeds, the windage yaw angle and unloading angle of the Y-type insulator string are obtained. …”
Get full text

Multilayer Perceptron for Robust Nonlinear Interval Regression Analysis Using Genetic Algorithms by Yi-Chung Hu

“…On the basis of fuzzy regression, computational models in intelligence such as neural networks have the capability to be applied to nonlinear interval regression analysis for dealing with uncertain and imprecise data. …”
Get full text

Least-Squares Parameter Estimation Algorithm for a Class of Input Nonlinear Systems by Weili Xiong, Wei Fan, Rui Ding

“…This paper studies least-squares parameter estimation algorithms for input nonlinear systems, including the input nonlinear controlled autoregressive (IN-CAR) model and the input nonlinear controlled autoregressive autoregressive moving average (IN-CARARMA) model. …”
Get full text

Nonlinear Dynamic Model-Based Adaptive Control of a Solenoid-Valve System by DongBin Lee, Peiman Naseradinmousavi, C. Nataraj

“…In this paper, a nonlinear model-based adaptive control approach is proposed for a solenoid-valve system. …”
Get full text

THE VARIATIONAL NONLINEAR CHIRP MODE DECOMPOSITION BASED ON CONVEX OPTIMIZATION FOR FAULT DIAGNOSIS by MA YuBo, LV Yong, YI CanCan

“…The problem in the processing of mechanical fault vibration signal by variational nonlinear chirp mode decomposition（VNCMD）,the noise leads to time-frequency surface blurring,which reduces the accuracy of time-frequency ridges extracted,and then affects the decomposition effect of VNCMD,is aimed at,so a joint fault diagnosis of convex optimization and VNCMD is proposed.The noise can be eliminated by solving the sparse approximate solution of signal via the convex optimization algorithm,which can improve the readability of the time-frequency surface,so as to obtain accurate timefrequency ridges.Then,by using these ridges,the fault features of the signal can be extracted effectively via VNCMD.Through the analysis of simulated signal and the measured bearing outer ring fault data,the results demonstrate that the proposed method can realize the accurate extraction of rolling bearing fault feature.…”
Get full text

Nonlinear ergodic theorems for asymptotically almost nonexpansive curves in a Hilbert space by Gang Li, Jong Kyu Kim

“…We introduce the notion of asymptotically almost nonexpansive curves which include almost-orbits of commutative semigroups of asymptotically nonexpansive type mappings and study the asymptotic behavior and prove nonlinear ergodic theorems for such curves. As applications of our main theorems, we obtain the results on the asymptotic behavior and ergodicity for a commutative semigroup of non-Lipschitzian mappings with nonconvex domains in a Hilbert space.…”
Get full text

Iterative Linear Quadratic Optimization for Nonlinear Control: Differentiable Programming Algorithmic Templates by Roulet, Vincent, Srinivasa, Siddhartha, Fazel, Maryam, Harchaoui, Zaid

Subjects: “…Nonlinear Discrete Time Control…”
Get full text

Finite Time Synchronization of Extended Nonlinear Dynamical Systems Using Local Coupling by A. Acosta, P. García, H. Leiva, A. Merlitti

Get full text

Weak Solution to a Parabolic Nonlinear System Arising in Biological Dynamic in the Soil by Côme Goudjo, Babacar Lèye, Mamadou Sy

“…We study a nonlinear parabolic system governing the biological dynamic in the soil. …”
Get full text