Visual-inertial navigation assisted by a single UWB anchor with an unknown position by Haolong Luo, Danping Zou, Jiansheng Li, Ancheng Wang, Li Wang, Zidi Yang, Guangyun Li

“…To accurately and rapidly estimate the UWB anchor positions, we employed the robust ridge nonlinear least-squares method to improve the accuracy and reliability of the estimated UWB anchor position. …”
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The Optimization Model for Reducing RON Loss in Gasoline Refining Process by Xuefei Lu, Xiaoyan Wang, Yifang Yang, Jianan Xue

“…We convert the problem into linear and nonlinear model variable optimization problems: the linear model is the variable selected by the SVR linear kernel function model and random forest; the nonlinear model is the combination of variables selected by the random forest model and random forest. …”
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Optimized Direct Padé and HPM for Solving Equation of Oxygen Diffusion in a Spherical Cell by M. A. Sandoval-Hernandez, H. Vazquez-Leal, A. Sarmiento-Reyes, U. Filobello-Nino, F. Castro-Gonzalez, A. L. Herrera-May, R. A. Callejas-Molina, R. Ruiz-Gomez

“…This work presents the application of homotopy perturbation method (HPM) and Optimized Direct Padé (ODP) to obtain a handy and easily computable approximate solution of the nonlinear differential equation to model the oxygen diffusion in a spherical cell with nonlinear oxygen uptake kinetics. …”
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Credit Rating Model of Small Enterprises Based on Optimal Discriminant Ability and Its Empirical Study by Zhanjiang Li, Lin Guo

“…Based on this principle, a nonlinear optimization model for credit rating division of small enterprises is built, and the approximate solution of the model is solved by a recursive algorithm with strong reproducibility and clear structure. …”
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The relationship between the atherogenic index of plasma and postoperative myocardial injury following non-cardiac surgery under general anaesthesia: a retrospective cohort study by Yuanjun Zhou, Liping Zhong, Yilin Liao, Yuting Zhong

“…Restricted cubic splines (RCS) were used to explore the potential nonlinear relationship between AIP and MINS. Logistic regression analysis was conducted to examine the association of AIP with MINS. …”
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Study on the load-supporting characteristic of the new type of support disc-type anchor under cyclic loading test by Fuguang Gu, Jun Wang, Hong Chang, Qinglin Sun, Zhengheng Gan, Haozhi Jiang

“…A functional model predicts the bearing capacity of the new type of support disc-type anchors through nonlinear fitting of the data, validating the model against measured results. …”
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Shear properties of jointed dual-pylon of the cable-stayed bridge with separated unequal-width decks under asymmetric load by Chao Luo, Jingzhou Xin, Jiafeng Yang, Yan Jiang, Lei Huang, Jianting Zhou

“…Moving load and longitudinal wind load have minimal impact on the nonlinear stability coefficient, and the dead load and lateral wind load primarily govern the failure of the dual-pylon connectivity node.…”
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Switch Reluctance Motor Control Based on Fuzzy Logic System by S. V. Aleksandrovsky, Yu. N. Petrenko

“…However, the SRM has the disadvantage of nonlinear characteristic and control. It is suggested to use controller based on fuzzy logic system. …”
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Positive Solutions for a Class of Fourth-Order p-Laplacian Boundary Value Problem Involving Integral Conditions by Yan Sun

“…The interesting point of the results is that the nonlinear term contains all lower-order derivatives explicitly. …”
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Mixed-type duality for multiobjective fractional variational control problems by Raman Patel

“…The results generalize a number of duality results previously obtained for finite-dimensional nonlinear programming problems under various convexity assumptions.…”
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Bounds of Double Integral Dynamic Inequalities in Two Independent Variables on Time Scales by S. H. Saker

“…Our aim in this paper is to establish some explicit bounds of the unknown function in a certain class of nonlinear dynamic inequalities in two independent variables on time scales which are unbounded above. …”
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Sociodynamics applied to the evolution of urban and regional structures by Wolfgang Weidlich

“…The central concepts of sociodynamics include transition rates depending on dynamic utilities and the master equation for the probability distribution over macrovariables. From it the set of nonlinear coupled differential equations for the quasi-meanvalues of the macrovariables can be derived.…”
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Existence and Uniqueness of Solutions for a Discrete Fractional Mixed Type Sum-Difference Equation Boundary Value Problem by Weidong Lv

“…By means of Schauder’s fixed point theorem and contraction mapping principle, we establish the existence and uniqueness of solutions to a boundary value problem for a discrete fractional mixed type sum-difference equation with the nonlinear term dependent on a fractional difference of lower order. …”
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Benjamin-Ono Equation on a Half-Line by Nakao Hayashi, Elena I. Kaikina

“…We study traditionally important problems of the theory of nonlinear partial differential equations, such as global in time existence of solutions to the initial-boundary value problem and the asymptotic behavior of solutions for large time.…”
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Viscosity Approximation Methods with Errors and Strong Convergence Theorems for a Common Point of Pseudocontractive and Monotone Mappings: Solutions of Variational Inequality Probl... by Yan Tang

“…Our theorems extend and unify some of the results that have been proposed for this class of nonlinear mappings.…”
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Existence and Nonexistence of Positive Solutions for a Higher-Order Three-Point Boundary Value Problem by Yongping Sun, Qian Sun, Xiaoping Zhang

“…This paper is concerned with the existence and nonexistence of positive solutions for a nonlinear higher-order three-point boundary value problem. …”
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An Optimal Control Problem Governed by a Kirchhoff-Type Variational Inequality by Chengfu Wang, Pengcheng Wu, Yuying Zhou

“…The existence of multiplicity solutions for the Kirchhoff-type variational inequality is established by using some nonlinear analysis techniques and the variational method, and the existence results of an optimal control for the optimal control problem governed by a Kirchhoff-type variational inequality are derived.…”
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APPROACHES TO DETERMINING THE EFFECTIVENESS OF BUSINESS COMMUNICATION IN THE PREPARATION OF STUDENTS by O. N. Gromova

“…It has been shown, that the concept of efficiency is a nonlinear problem, supposing the determination of the compromise zone for each of the parties involved. …”
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Existence of Solutions for the Discrete Dirichlet Problem Involving p-Mean Curvature Operator by Jianxia Wang, Zhan Zhou

“…Under some determinate growth conditions on the nonlinear term, the existence of one solution or two nontrivial solutions is obtained via variational methods and some analysis techniques. …”
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Observer-Based Fuzzy Control for Memristive Circuit Systems by Qian Ye, Xuyang Lou

“…First, the Takagi-Sugeno fuzzy model is adopted to reconstruct the nonlinear chaotic circuit system. Next, based on the proposed fuzzy model, an observer-based fuzzy controller is developed to estimate the states and stabilize the origin. …”
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