Tracking controller design for quadrotor UAVs under external disturbances using a high-order sliding mode-assisted disturbance observer by Zheng Sun, Min Xiao, Di Li, Jia Chu

“…The observer consists of a classical nonlinear DO (NDO) and a sliding mode-assisted system (SMAS). …”
Get full text

Hybrid technique for multi-dimensional fractional diffusion problems involving Caputo–Fabrizio derivative by Surendar Kumar Yadav, Mridula Purohit, Murli Manohar Gour, Lokesh Kumar Yadav, Manvendra Narayan Mishra

“…The proposed approach combines the Shehu transformation (ST) with the Adomian decomposition method (ADM), employing Adomain polynomials to handle nonlinear terms. Fixed point theorem has been used to prove the uniqueness and existence of the solution of governing differential equation. …”
Get full text

Intraspinal Transplantation of the Adipose Tissue-Derived Regenerative Cells in Amyotrophic Lateral Sclerosis in Accordance with the Current Experts’ Recommendations: Choosing Opti... by Magdalena Kuzma-Kozakiewicz, Andrzej Marchel, Anna Kaminska, Malgorzata Gawel, Jan Sznajder, Anna Figiel-Dabrowska, Arkadiusz Nowak, Edyta Maj, Natalia Ewa Krzesniak, Bartlomiej H. Noszczyk, Krystyna Domanska-Janik, Anna Sarnowska

“…It is not only due to a limited number of studies, small treatment groups, and fast but nonlinear disease progression but also due to lack of objective methods able to show subtle clinical changes. …”
Get full text

A Lagrangian particle model for one-dimensional transient pipe flow with moving boundary by Yuejin Cai, Jianguo Wei, Qingzhi Hou, Huaicheng Fan, Arris S. Tijsseling

“…In this model, the meshless smoothed particle hydrodynamics (SPH) is used to approximate the spatial derivatives in the waterhammer equations, and the symplectic leap frog scheme is used for time integration. The nonlinear convective terms – which are mostly neglected in classical water hammer – are taken into account. …”
Get full text

Effect of Different Types of Middle Columns on the Seismic Performance of Single-Story Subway Station Structure by Sheng Li, Haiyang Zhuang, Wei Wang, Liguo Jin, Zhengfang Dong

“…In view of the seismic weak component of the single-frame-type subway station structure, the three-dimensional (3D) time-domain nonlinear finite element static-dynamic coupling analysis model of interaction between soil and subway station structure is established by, respectively, using rectangular reinforced concrete (RRC) columns, circular reinforced concrete (CRC) columns, and prefabricated concrete-filled steel tube (CFST) columns with a quick-connection device proposed in this article. …”
Get full text

Atomically engineering interlayer symmetry operations of two-dimensional crystals by Ziyi Han, Shengqiang Wu, Chun Huang, Fengyuan Xuan, Xiaocang Han, Yinfeng Long, Qing Zhang, Junxian Li, Yuan Meng, Lin Wang, Jiahuan Zhou, Wenping Hu, Jingsi Qiao, Dechao Geng, Xiaoxu Zhao

“…Some higher-order phases such as 6 R, 12 R, and 18 C can be accessed, exhibiting modulated nonlinear optical responses suggested by first-principle calculations. …”
Get full text

Energy Response Analysis of Continuous Beam Bridges with Friction Pendulum Bearing by Multihazard Source Excitations by Bing Li, Bin Wang, Shaohua Wang, Xiao Wu

“…A three-dimensional finite element analysis of a multispan continuous concrete girder bridge with FPB was established using the nonlinear time-history method to verify the accuracy of analytical modelling. …”
Get full text

Location Design of Electric Vehicle Charging Facilities: A Path-Distance Constrained Stochastic User Equilibrium Approach by Wentao Jing, Kun An, Mohsen Ramezani, Inhi Kim

“…In the upper level, the objective is to maximize coverage of BEV flows by locating a given number of charging stations on road segments considering budget constraints. A mixed-integer nonlinear program is proposed to formulate this model. …”
Get full text

Numerical Analysis of a Train-Bridge System Subjected to Earthquake and Running Safety Evaluation of Moving Train by Xun Yang, Huanhuan Wang, Xianlong Jin

“…Parallel computing based on contact balance was utilized to deal with this large-scale numerical simulation problem. The dynamic nonlinear analysis was performed on a Hummingbird supercomputer using the finite element code LS-DYNA 971. …”
Get full text

Gamma Precorrection and Phase Error Compensation Methods Based on Three-Frequency with Three-Phase Shift by Wei Feng, Shaojing Tang, Shinan Xu, Tong Qu, Daxing Zhao

“…Considering the phase error caused by the gamma distortion and nonlinear error, the active gamma precorrection and phase error compensation methods based on the three-frequency with three-phase shifts are designed to reversely solve the initial phase and accurately compensate phase error. …”
Get full text

A Hybrid Power Series Artificial Bee Colony Algorithm to Obtain a Solution for Buckling of Multiwall Carbon Nanotube Cantilevers Near Small Layers of Graphite Sheets by Aminreza Noghrehabadi, Mohammad Ghalambaz, Mehdi Ghalambaz, Afshin Ghanbarzadeh

“…A hybrid power series and artificial bee colony algorithm (PS-ABC) method is applied to solve a system of nonlinear differential equations arising from the distributed parameter model of multiwalled carbon nanotube (MWCNT) cantilevers in the vicinity of thin and thick graphite sheets subject to intermolecular forces. …”
Get full text

Multiple symmetry protected BIC lines in two dimensional synthetic parameter space by Zhang Fengyuan, Chu Qiongqiong, Wang Qiang, Zhu Shining, Liu Hui

“…Therefore, our design can provide new insight for a variety of on-chip applications, such as nonlinear devices, integrated nanolasing array, and high-resolution sensors for infrared molecular detection.…”
Get full text

Experimental Study on the Tensile Properties of Rock-Mortar Interface under Different Strain Rates by Nan Wu, Zhende Zhu, Zhilei He

“…In this paper, an experimental study was carried out on a rock-mortar interface specimen under three different strain rates (10−6, 10−5, and 10−4  s−1) using the MTS322 electrohydraulic servo loading system, and a new constitutive relation function of fictitious crack model (FCM) according to the axial-stress-crack-width curves of the rock-mortar interface is established, because the traditional nonlinear softening function easily distorts, shakes, and so cannot describe the damage-evolution process of the rock-mortar interface accurately. …”
Get full text

Response Analysis of the Free Field under Fault Movements by H. L. Qu, Y. Wu, B. K. Zhang, Q. D. Hu, Z. L. Xiao

“…A quasistatic simulation of highly nonlinear problems under fault movements was carried out using the EXPLICIT module of ABAQUS. …”
Get full text

Seismic Response Mitigation of a Long-Span Tower Bridge with Two Types of Constraint System by Li Xu, Qingfei Gao, Junhao Zheng, Chuanhui Ding, Kang Liu

“…In order to study the most suitable longitudinal damping mode for a long-span cable-stayed bridge. In this article, a nonlinear finite element model is established based on a large span concrete cable-stayed bridge with a main span of 680 m. …”
Get full text

Continuous and pulsed epidemiological models for onchocerciasis with implications for eradication strategy by Glenn Ledder, Donna Sylvester, Rachelle R. Bouchat, Johann A. Thiel

“…Asymptotic approximation allows us to reduce the vector-borne epidemiological model to a model of an infectious disease with nonlinear incidence. We then consider two versions, one with continuous treatment and a more realistic one where treatment occurs only at intervals. …”
Get full text

Derivation of CaO-SiO2-Al2O3system slag viscosity equation by GP by Ri S.-C., Ra J.-H., Ryom K.-C.

“…However, a slag viscosity model is difficult to exactly interpret as it has a strong nonlinear relation with its composition and temperature. …”
Get full text

Digital economy, green innovation and regional resource allocation efficiency: evidence from 257 cities in China by Li Jiang, Li Jiang, Min Zhang, Shihui Hu

“…IntroductionThe digital economy is reshaping economic structures and resource flows, but its role in enhancing resource allocation efficiency within the framework of green development has not yet been fully explored.MethodsThis paper analyzes panel data from 257 Chinese cities to investigate how the digital economy influences regional resource allocation efficiency, with a focus on the mediating role of green innovation.ResultsThe results show that the digital economy significantly improves resource allocation efficiency, with nonlinear effects characterized by increasing marginal returns. …”
Get full text

A Spatial Euler-Bernoulli Beam Element for Rigid-Flexible Coupling Dynamic Analysis of Flexible Structures by Zhigang Zhang, Zhaohui Qi, Zhigang Wu, Huiqing Fang

“…A two-node spatial beam element with the Euler-Bernoulli assumption is developed for the nonlinear dynamic analysis of slender beams undergoing arbitrary rigid motions and large deformations. …”
Get full text

Comparative Analysis of Battery State of Charge Estimation Methods by Margal Ali, El Daoudi Soukaina, Khallouq Abdelmounaim, Karama Asma

“…This paper presents three methods for estimating SoC: the extended Kalman filter (EKF), the adaptive Luenberger observer (ALO), and a neural network model employing nonlinear auto-regressive with eXogenous inputs (NARX). …”
Get full text