Policy and Law Assessment of COVID-19 Based on Smooth Transition Autoregressive Model by Jieqi Lei, Xuyuan Wang, Yiming Zhang, Lian Zhu, Lin Zhang

“…Our model well fits the data. Moreover, the nonlinear smooth function within the STAR model reveals that the implementation of prevention and control policies is effective in some regions with different speeds. …”
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Error Signal Differential Term Feedback Enhanced Variable Step Size FxLMS Algorithm for Piezoelectric Active Vibration Control by Weiguang Li, Wei Wang, Bin Li, Zhichun Yang

“…In this paper, a new DVSFxLMS (error signal Differential term feedback Variable Step size FxLMS) algorithm is proposed by establishing nonlinear function between μ and error signal, while using differential term of the error signal as the feedback control function. …”
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A Study Using the Network Simulation Method and Nondimensionalization of the Fiber Fuse Effect by Juan Francisco Sanchez-Pérez, Joaquín Solano-Ramírez, Fulgencio Marín-García, Enrique Castro

“…The results highlight the effectiveness of the NSM in solving nonlinear and coupled problems in thermal engineering, providing a solid framework for future research in the optimisation of optical communication systems.…”
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Performance Comparison of Mode Choice Optimization Algorithm with Simulated Discrete Choice Modeling by Hyuk-Jae Roh, Satish Sharma, Prasanta K. Sahu, Babak Mehran

“…The golden section method (GSM) incorporates a nonlinear programming technique to choose an optimal step size automatically. …”
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Dynamic Characteristics of Electrostatically Actuated Shape Optimized Variable Geometry Microbeam by Sha Zhang, Wen-Ming Zhang, Zhi-Ke Peng, Guang Meng

“…We mainly analyze the dynamic characteristics of electrostatically actuated shape optimized variable geometry microbeam. A nonlinear dynamic model considering midplane stretching, electrostatic force, and electrical field fringing effects is developed. …”
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Coevolving Dynamics between Epidemic and Information Spreading considering the Dependence between Vigilance and Awareness Prevalence by Yixiao Zhang, Xing Lu, Ni Cui, Jingtai Tang, Xiyun Zhang

“…To better understand this effect, we introduce a nonlinear dependence of the epidemic infection rate on awareness prevalence, focusing on the effect of different forms of dependence on the coevolving dynamics. …”
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Path Planning and Control of a Quadrotor UAV Based on an Improved APF Using Parallel Search by Tianpeng Huang, Deqing Huang, Na Qin, Yanan Li

“…Considering the external disturbance acting on the quadrotor, a nonlinear disturbance observer (NDO) is developed to guarantee observation error to exponentially converge to zero. …”
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A novel multiple directional shearing interferometry system with synchronous polarization phase shifting by Yahui Zhu, Ailing Tian, Hongjun Wang, Bingcai Liu, Kai Wang

“…This design effectively mitigates nonlinear issues and environmental influences commonly encountered in synchronous phase-shifting interferometry. …”
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Seismic Response of 3D Steel Buildings considering the Effect of PR Connections and Gravity Frames by Alfredo Reyes-Salazar, Edén Bojórquez, Achintya Haldar, Arturo López-Barraza, J. Luz Rivera-Salas

“…The nonlinear seismic responses of 3D steel buildings with perimeter moment resisting frames (PMRF) and interior gravity frames (IGF) are studied explicitly considering the contribution of the IGF. …”
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Numerical Investigation of Distribution Laws of Shear Force in Box Girder Webs by Xingwei Xue, Chao Zang, Junlong Zhou, Hai Zhang

“…The results show that supporting conditions and chambers have a significant impact on the shear-increased coefficient η, and end diaphragm must be set up in the 3D finite element model when calculating η. Nonlinear analysis shows that in the elastic phase, the shear-increased coefficient η basically does not change, but in the cracking stage, the coefficient η of each web changes with the degree of web cracking, and side-webs (S-Webs) reach the ultimate load first. …”
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Some Aspects of Sensitivity Analysis in Variational Data Assimilation for Coupled Dynamical Systems by Sergei Soldatenko, Peter Steinle, Chris Tingwell, Denis Chichkine

“…In this paper, the sensitivity with respect to variations in the parameters of one of the main components of VDA, the nonlinear forecasting model, is considered. For chaotic atmospheric dynamics, conventional methods of sensitivity analysis provide uninformative results since the envelopes of sensitivity functions grow with time and sensitivity functions themselves demonstrate the oscillating behaviour. …”
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Fractional Stress Relaxation Model of Rock Freeze-Thaw Damage by Q. Liu, W. Chen, J. K. Guo, R. F. Li, D. Ke, Y. Wu, W. Tian, X. Z. Li

“…A new three-element model is established to better reflect the nonlinear stress relaxation behavior of rocks under freeze-thaw. …”
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Methodology to compute the speed of pumps that fit the hydrodynamic levels in a well field by Georgescu Sanda-Carmen, Găitănaru Ștefan-Dragoș, Iancu Iulian, Miron Călin Ioan, Georgescu Andrei-Mugur

“…The method is exemplified for a case study in Bucharest − a small well field, for which hydrogeological data are available. The nonlinear system of equations that defines the hydraulic system operation is solved in MATLAB for the stationary flow regime attained after reaching constant hydrodynamic levels in all wells. …”
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Evaluation and Application of Surrounding Rock Stability Based on the Improved Weighting Multidimensional Cloud Model by Jing Long Li, Chao Yuan, Bo Zhang, Bin Sui

“…Aiming at the uncertainty in the existing tunnel surrounding rock stability evaluation methods and the inability to make scientific explanations in the process of determining the weights of multiple evaluation indicators, this paper combines subjective weighting based on the nonlinear characteristics of the surrounding rock stability evaluation criteria. …”
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Bottom-up fabrication of 2D Rydberg exciton arrays in cuprous oxide by Kinjol Barua, Samuel Peana, Arya Deepak Keni, Vahagn Mkhitaryan, Vladimir M. Shalaev, Yong P. Chen, Alexandra Boltasseva, Hadiseh Alaeian

“…To harness these nonlinearities for quantum applications, the confinement dimensions must match the Rydberg blockade size, which can reach several microns in Cu2O. …”
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Automotive Electric Power Steering Control With Robust Observer Based Neuroadaptive Type-2 Radial Basis Function Methodology by Abdollah Amirkhani, Masoud Shirzadeh, Jamshid Heydari

“…A ST2-RBF system is proposed for approximating the unknown nonlinear functions. The ST2-RBF parameters are tuned online based on the adaptation laws obtained via Lyapunov stability analysis. …”
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Efficiency-Aware: Maximizing Energy Utilization for Sensor Nodes Using Photovoltaic-Supercapacitor Energy Systems by Zheng Liu, Xinyu Yang, Shusen Yang, Julie McCann

“…We formalize the maximization problem as a nonlinear optimization problem and develop two efficient algorithms for its optimal solutions. …”
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Relationships between Imperfections and Shear Buckling Resistance in Web Plate with Sectional Damage Caused by Corrosion by Jin-Hee Ahn, Shigenobu Kainuma, Won-Hong Lee, Youn-Ju Jeong, In-Tae Kim

“…To examine the imperfection effect on the shear buckling resistance of a web plate with sectional damage, a series of nonlinear finite element (FE) analyses were carried out for a web plate with sectional damage, which was assumed as local corrosion damage. …”
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Arc-Surfaced Frictional Damper for Vibration Control in Container Crane by Gongxian Wang, Yang-Yang Wang, Jianming Yuan, Yi Yang, Dong Wang

“…After that, seismic responses of container crane with and without dampers to four earthquakes are studied using nonlinear dynamic time-history analysis. Besides this system, a diagonal-brace-AFD system is studied for comparison. …”
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Modeling and optimal regulation of erythropoiesis subject to benzene intoxication by H. T. Banks, Cammey E. Cole, Paul M. Schlosser, Hien T. Tran

“…The exposure-dose-response relationship of benzene in humans is expected to be nonlinear becausebenzene undergoes a series of metabolic transformations, detoxifying and activating, resulting in various metabolites that exert toxic effects on the bonemarrow. …”
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