Dynamic Surface and Active Disturbance Rejection Control for Path Following of an Underactuated UUV by Juan Li, Haitao Gao, Jiajia Zhou, Zheping Yan

“…This controller can effectively avoid the phenomenon of explosion of terms in the conventional backstepping method, reduce the dependence on the UUV controller mathematical model, and enhance the antijamming ability. …”
Get full text

The Experience of Using «Virtual Petrolab» – Virtual Petrophysical laboratory for Mobile Devices in the Educational Process by E. V. Shelyago, N. D. Shelyago

“…The program “Virtual PetroLab” simulates functions of various petrophysical equipment in the lab, possesses built-in methodological instructions on performing laboratory works. The mathematical model of the application allows the student to conduct measuring tasks, make, accumulate and correct his own errors. …”
Get full text

Analysis of Static Characteristic of Hydrodynamic Bearing with Different Surface Roughnesses by Hong Guo, Lanlan Song, Shaolin Zhang, Weipei He

“…In order to study the influence of roughness on the static characteristics of bearing， an experimental platform is built based on M2000 friction and wear testing machine to test the sliding friction pairs of 42CrMo steel， and a Reynolds mathematical model considering the surface roughness is established and solved. …”
Get full text

Influence of Tooth Surface Microstructure on the Stability of Gear Motion by Wang Wei, Adayi Xieeryazidan, Shen Shiyu

“…With the help of W-M function,M-B fractal contact model and Hertz contact formula,the stiffness and damped mathematical model considering the uneven surface of gear surface is established. …”
Get full text

Unveiling the Mechanisms of a Remission in Major Depressive Disorder (MDD)-like Syndrome: The Role of Hippocampal Palmitoyltransferase Expression and Stress Susceptibility by Careen A. Schroeter, Anna Gorlova, Michael Sicker, Aleksei Umriukhin, Alisa Burova, Boris Shulgin, Sergey Morozov, Joao P. Costa-Nunes, Tatyana Strekalova

Get full text

A Model of ESG-Transparency Index in Corporate Reporting by R. P. Bulyga, M. V. Melnik, I. V. Safonova, V. B. Gisin

“…Current "transparency indices" fall short in incorporating these factors, leading to methodological incomparability and gaps in assessing the "quality" and "reliability" of estimated values.To address this gap, the authors propose a novel mathematical model for the ESG transparency index in corporate reporting. …”
Get full text

A Combined MPC and PI Control Strategy for Bidirectional Interleaved Totem Pole PFC Converters in Electric Vehicle G2V and V2G Applications by Lassioui Abdellah, Kabba Abdelaziz, El Ancary Marouane, Hasni Anwar, El Asri Yassine, El Idrissi Zakariae, El Fadil Hassan

“…The converter’s mathematical model is used to implement the MPC, which ensures a unit power factor during both Grid-to-Vehicle (G2V) and Vehicle-to-Grid (V2G) operations. …”
Get full text

Global threshold dynamics in an HIV virus model with nonlinear infection rate and distributed invasion and production delays by Zhaohui Yuan, Xingfu Zou

“…We consider a mathematical model that describes the interactions ofthe HIV virus, CD4 cells and CTLs within host, which is amodification of some existing models by incorporating (i) twodistributed kernels reflecting the variance of time for virus toinvade into cells and the variance of time for invaded virions toreproduce within cells; (ii) a nonlinear incidence function $f$ forvirus infections, and (iii) a nonlinear removal rate function $h$for infected cells. …”
Get full text

ENERGY ABSORPTION STUDY OF FLEXIBLE ELASTIC DOT MATRIX SUPPORT BASED ON DLP PROCESS by FANG Chuang, JI XiaoGang, DENG Lin, WANG Wei

“…Based on the geometric topology design of the cell structure, the equivalent mechanical model of the cell structure was established by using Timoshenko beam theory to obtain a mathematical model for predicting energy absorption, and the influence of cell geometry and load direction was analyzed in focus. …”
Get full text

Hardware and Deep Learning-Based Authentication Through Enhanced RF Fingerprints of 3D-Printed Chaotic Antenna Arrays by Justin O. McMillen, Fawaz Abdul Razak, Gokhan Mumcu, Yasin Yilmaz

“…In this work, we propose a Chaotic Antenna Array (CAA) system for significantly enhanced RF fingerprints and a deep learning-based device authentication method for CAA. We provide a mathematical model for CAA, explain how it can be cost-effectively manufactured by utilizing mask-free laser-enhanced direct print additive manufacturing (LE-DPAM), and comprehensively analyze the authentication performance of several deep learning classifiers for CAA. …”
Get full text

An efficient technique to study of time fractional Whitham–Broer–Kaup equations by Nishant Bhatnagar, Kanak Modi, Lokesh Kumar Yadav, Ravi Shanker Dubey

“…In this study, we derive the approximate analytical solution for the fractional coupled Whitham–Broer–Kaup (WBK) equations, a significant mathematical model for representing wave propagation in shallow water. …”
Get full text

Hyperspherical Manifold for EEG Signals of Epileptic Seizures by Tahir Ahmad, Vinod Ramachandran

“…The mathematical modelling of EEG signals of epileptic seizures presents a challenge as seizure data is erratic, often with no visible trend. …”
Get full text

Structure Design and Analysis of a New Kind of Composite Climbing-ladder Wheelchair by Gen Xiong, Hua Zhang, Yilin Zhou, Shuai You, Zhijun Shang

“…On the basis of comparing the structural characteristics of the existing climbing wheelchair， the scheme of designing a new type wheelchair robot with a combination of with the planet wheel and track is introduced， and its operating principle is analyzed， a mathematical model is established to make a kinematics and dynamics analysis on the stair-climbing process. …”
Get full text

Analysis of Sliding Characteristic of Traction Drive Reducer for Automotive In-wheel Motor by Shu Hongyu, Yao Zejie

“…To analyze the sliding characteristic of the traction drive reducer for the automotive in-wheel motor,the working mechanism is researched. Then,a mathematical model and an analysis method are proposed to accurately calculate the sliding characteristics combined with the elastohydrodynamic lubrication（ EHL） theory. …”
Get full text

Design and Analysis of Closed-Linked Eight-Link Foot Robot with Composite Hinges by Hao Zhang, Jianjun Qin, Xingjie Liu, Lei Jiang

“…In view of the complexity of parameters and modeling stratification of the eight-link robot leg configuration mathematical model，a simplest eight-link leg mechanism with composite hinges is proposed. …”
Get full text

Research of Design and Control Strategy of Power Coupling Mechanism for Dual-motor Electric Vehicle by Wang Fei Wang Tie Wu Zhifei

“…Finally， the corresponding driving module and control strategy module are built in Matlab/Simulink according to the mathematical model of each part of the vehicle， and the mathematical simulation is carried out. …”
Get full text

Numerical Analysis on the Influence of Thermal Effects on Oil Flow Characteristic in High-Pressure Air Injection (HPAI) Process by Hu Jia, Jin-Zhou Zhao, Wan-Fen Pu

“…To clarify the influences of thermal effects on oil production, in this paper, we derived a mathematical model for calculating oil flow rate, which is based on the heat conduction property in porous media from the combustion tube experiment. …”
Get full text

Construction Prototyping, Flight Dynamics Modeling, and Aerodynamic Analysis of Hybrid VTOL Unmanned Aircraft by Roman Czyba, Marcin Lemanowicz, Zbigniew Gorol, Tomasz Kudala

“…This paper presents the design process of an unmanned vertical take-off and landing aircraft including prototyping of the airframe construction and mathematical modeling as well as computational fluid dynamics (CFD) simulations. …”
Get full text

The Analysis of Biomimetic Caudal Fin Propulsion Mechanism with CFD by Guijie Liu, Shuikuan Liu, Yingchun Xie, Dingxin Leng, Guanghao Li

“…Lastly, through the mathematical model analysis of the tail of the swordfish, the producing propulsive force principle of the caudal fin and the caudal peduncle was obtained. …”
Get full text

A Novel Memductor-Based Chaotic System and Its Applications in Circuit Design and Experimental Validation by Li Xiong, Yanjun Lu, Yongfang Zhang, Xinguo Zhang

“…Furthermore, the design principle of the memductor-based chaotic circuit is thoroughly analyzed and the concept of “the memductor-based chaotic circuit defect quantification index” is proposed for the first time to verify whether the chaotic output is consistent with the mathematical model. A good qualitative agreement is shown between the simulations and the experimental validation results.…”
Get full text