The Impact of Geopolitical Risk on Systemic Risk Spillover in Commodity Market: An EMD-Based Network Topology Approach by Zhijing Ding, Xu Zhang

“…However, due to the nonlinear fluctuations brought about by extreme events, investors face more difficulties in the choice of risk portfolio. …”
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Design and Implementation of a New Fast and Efficient MPPT Controller under Different Solar Irradiance Conditions by K. Padmanaban, A. Shunmugalatha, M. S. Kamalesh

“…The power-voltage (P-V) characteristic curve of solar photovoltaic (PV) systems operating in partial shading conditions (PSC) is nonlinear and has multiple local maximum peak power (LMPP) points, rendering many of the maximum power point tracking (MPPT) algorithms ineffective at locating global maximum peak power (GMPP) points. …”
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EQUIVALENT CIRCUIT SIMULATION OF A TWO-DEGREE-OF-FREEDOM ELASTIC COLLISION VIBRATION SYSTEM WITH GAPS by ZHU Xifeng, FU Wenbin, MA Shuo, ZHENG Dong

“…A two-degree-of-freedom collision system with gap and elastic constraint was used as the research object, and the regional distribution and transitions of the periodic motion of the system under low frequency conditions were studied by numerical simulation.It was obtained that with the decrease of excitation frequency, the <italic>p</italic>/1 periodic motion occurs with grazing bifurcation transitions to （<italic>p</italic>+1）/1 periodic motion.When the number of collisions was large enough, the Chattering-impact characteristics were presented.Then a circuit model that was completely equivalent to the collision system was established and simulation experiments were carried out.The results show that the results generated by establishing the equivalent circuit are consistent with those generated by numerical simulations, and the equivalent circuit is more efficient in simulation experiments, which can realize fast modal transitions and parameter adjustments，making it more convenient and providing a research method for the study of nonlinear dynamics.…”
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On the Inertia Term of Projectile's Penetration Resistance by Yu Shan, Haijun Wu, Fenglei Huang, Jinzhu Li

“…The effect of the target inertia term of rigid kinetic energy projectiles (KEP’s) penetration resistance is investigated using nonlinear dynamic code LS-DYNA and four constitutive models. …”
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Design of Large Thinned Arrays Using Different Biogeography-Based Optimization Migration Models by Sotirios K. Goudos, John N. Sahalos

“…The original BBO uses a linear migration model to describe how species migrate from one island to another. Other nonlinear migration models have been proposed in the literature. …”
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AI prediction model for endovascular treatment of vertebrobasilar occlusion with atrial fibrillation by Zhi-Xin Huang, Andrea M. Alexandre, Alessandro Pedicelli, Xuying He, Quanlong Hong, Yongkun Li, Ping Chen, Qiankun Cai, Aldobrando Broccolini, Luca Scarcia, Serena Abruzzese, Carlo Cirelli, Mauro Bergui, Andrea Romi, Erwah Kalsoum, Giulia Frauenfelder, Grzegorz Meder, Simona Scalise, Maria Porzia Ganimede, Luigi Bellini, Bruno Del Sette, Francesco Arba, Susanna Sammali, Andrea Salcuni, Sergio Lucio Vinci, Giacomo Cester, Luisa Roveri, Xianjun Huang, Wen Sun

“…Novel findings include nonlinear relationships between dyslipidemia, stroke severity, and functional recovery. …”
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Deterministic Epidemic Models for Ebola Infection with Time-Dependent Controls by Eric Okyere, Johnson De-Graft Ankamah, Anthony Kodzo Hunkpe, Dorcas Mensah

“…In this paper, we have studied epidemiological models for Ebola infection using nonlinear ordinary differential equations and optimal control theory. …”
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CLUNK PHENOMENA ANALYSIS OF AUTOMOBILE TRANSMISSION SYSTEM BASED ON TORQUE ABRUPT CONDITION by ZHANG ZhiGang, PENG YuanPing, YU XiaoXia, ZHANG Yun

“…Through the analysis of the transmission mechanism of the vehicle transmission system,the torsional vibration model of the 12-DOF multi-gap nonlinear powertrain system was established,and the transient shock response characteristics under various working conditions were studied. …”
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Development of a Multi-DOF Electromyography Prosthetic System Using the Adaptive Joint Mechanism by A. Hernandez Arieta, R. Katoh, H. Yokoi, Y. Wenwei

“…For the discrimination of many patterns and nonlinear properties of the EMG signal, we propose a controller based on a simple pattern recognition information process. …”
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Energy Balanced Scheduling for Target Tracking with Distance-Dependent Measurement Noise in a WSN by Xiaoqing Hu, Ming Bao, Yu-Hen Hu, Bugong Xu

“…It is assumed that the distance estimates of range sensors are contaminated by distance-dependent multiplicative observation noises. The nonlinear measurement model leads to the application of a generalized unscented Kalman filtering (GUKF) tracking algorithm. …”
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Mathematical Modeling and Analysis of TB and COVID-19 Coinfection by Kassahun Getnet Mekonen, Shiferaw Feyissa Balcha, Legesse Lemecha Obsu, Abdulkadir Hassen

“…This paper introduces a mathematical model for the transmission dynamics of TB and COVID-19 coinfection using a system of nonlinear ordinary differential equations. The well-posedness of the proposed coinfection model is then analytically studied by showing properties such as the existence, boundedness, and positivity of the solutions. …”
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Design of Flight Control System for a Novel Tilt-Rotor UAV by Zaibin Chen, Hongguang Jia

“…First, a new configuration scheme with the tilting rotors is designed. Then, the detailed nonlinear mathematical model is established, and the parameters are acquired from designed experiments and numerical analyses. …”
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Invariant Inhomogeneous Bianchi Type-I Cosmological Models with Electromagnetic Fields Using Lie Group Analysis in Lyra Geometry by Ahmad T. Ali

“…For this, Lie group analysis method is used to identify the generators that leave the given system of nonlinear partial differential equations (NLPDEs) (Einstein field equations) invariant. …”
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Investigation of Mode I fracture toughness of red Verona marble after thermal treatment by Daniela Scorza, Andrea Carpinteri, Giovanni Fortese, Sabrina Vantadori, Daniele Ferretti, Roberto Brighenti

“…Such a method is able to take into account the slow nonlinear crack growth occurring before the peak load, typical of quasi-brittle materials, with the advantage of easy specimen preparation and simple test configuration. …”
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Evaluation of Seismic Performance and Effectiveness of Multiple Slim-Type Damper System for Seismic Response Control of Building Structures by David Kim, Eun Hee Sung, Kwan-Soon Park, Jaegyun Park

“…Numerical simulations are also carried out by nonlinear time history analysis with a ten-story earthquake excited building structure. …”
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Determination of conditions for optimal control of linear magnetoelectric drive of low-speed single-stage piston compressor by A. A. Tatevosyan

“…However, in this case, nonlinear suction-discharge processes occurring in the compressor stage have a significant effect on the operation of the electromechanical converter. …”
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Two-Dimensional Ferroelectric Materials: From Prediction to Applications by Shujuan Jiang, Yongwei Wang, Guangping Zheng

“…Based on the work discussed in this review, we look ahead to theoretical prediction for 2D ferroelectric materials and their potential applications, such as the application in nonlinear optics. The progress in theoretical and experimental research could lead to the discovery and design of next-generation nanoelectronic and optoelectronic devices, facilitating the applications of 2D ferroelectric materials in emerging advanced technologies.…”
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Suppression of MRI Truncation Artifacts Using Total Variation Constrained Data Extrapolation by Kai Tobias Block, Martin Uecker, Jens Frahm

“…The assumption translates into a total variation minimization problem, which can be solved with a nonlinear optimization algorithm. In the presence of substantial noise, a modified approach offers edge-preserving denoising by allowing for slight deviations from the measured data in addition to supplementing data. …”
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Finite-element Stress and Deformation Analysis of a Geomembrane Face Rockfill Dam by ZHAO Yuhao, LI Zhenhua, CHEN Sining, GONG Hanzhong, LIN Wei

“…For a certain reservoir dam that is a geomembrane face rockfill dam,the composite geomembrane is used as the face slab on the dam surface to prevent seepage.A three-dimensional nonlinear finite-element model of this reservoir dam was built to simulate the dam filling construction,the laying of the composite geomembrane,and the process of reservoir impoundment.The stress and deformation of the dam body and the composite geomembrane during the completion and impoundment periods were analyzed,and the rationality of the structural design of this geomembrane face rockfill dam was demonstrated.The calculation results show that the distribution of the dam body displacement and stress before and after impoundment follows the general rules and that impoundment is beneficial to the safety of the dam.Moreover,the shear failure of the dam body is prevented.The composite geomembrane is subject to tensile strain and stress in the lower half of the face slab due to boundary constraints.Nevertheless,the lateral and longitudinal safety factors calculated meet the requirements of design specifications,and the safety of the geomembrane is guaranteed.…”
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Implementing Velocity-Based Training to Optimize Return to Sprint After Anterior Cruciate Ligament Reconstruction in Soccer Players: A Clinical Commentary by Florian FORELLI, Jérôme RIERA, Patrice MARINE, Maxime GASPAR, Geoffrey MEMAIN, Nicholas MIRAGLIA, Mathias NIELSEN – LE ROUX, Ismail BOUZEKRAOUI ALAOUI, Georgios KAKAVAS, Timothy E HEWETT, Enda KING, Alexandre JM RAMBAUD

“…The characteristics of running in soccer are specific (velocity differences, nonlinear, intensity). It is important to address these particularities, such as curvilinear running, acceleration, deceleration, changes of direction, and variations in velocity, in the patient's rehabilitation program. …”
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