Research on the Optimization Strategy of the Speed Ratio Control Parameter of Vehicle Swing Pin Chain CVT by Guo Wei, Li Yuankai, Zhang Wu, Jia Gaoxiang

“…The fuzzy PID control method is adopted to simulate the automobile cycle working condition by analyzing the structure and working principle of the swing pin chain CVT，the mathematical model of the CVT transmission system and the sub-model of the speed ratio fuzzy controller are built. …”
Get full text

Ion homeostasis in the regulation of intracellular pH and volume of human erythrocytes by О. І. Доценко, Г. В. Тарадіна

“…Material and Methods: The mathematical model was developed using general approaches to modeling cellular metabolism, which are based on systems of ordinary differential equations describing metabolic reactions, passive and active ion fluxes. …”
Get full text

Performance optimization analysis of cleaning mechanism for bottom frozen sticky float coal in train body based on Edem-RecurDyn co-simulation by XIE Miao, Ll SiYao, LIU Yi, NIE RenDong, ZHANG HongYu, ZHU Yun, LIU DongXu

“…After the objective function was obtained, the mathematical model was solved by Matlab to obtain the optimal solution. …”
Get full text

Persistence and emergence of X4 virus in HIV infection by Ariel D. Weinberger, Alan S. Perelson

“…Previously, we used numerical simulations of a mathematical model to show that across much of parameter space a promising new class of antiretroviral treatments, CCR5 inhibitors, can accelerate X4 emergence and immunodeficiency. …”
Get full text

Some fixed point results with the vector degree of nondensifiability in generalized Banach spaces and application on coupled Caputo fractional delay differential equations by Laksaci Noura, Hasan Fady, Boudaoui Ahmed, Mustafa Zead, Shatanawi Wasfi

Get full text

Positivity of Fundamental Matrix and Exponential Stability of Delay Differential System by Alexander Domoshnitsky, Roman Shklyar, Mikhail Gitman, Valery Stolbov

Get full text

PLL Based Energy Efficient PV System with Fuzzy Logic Based Power Tracker for Smart Grid Applications by G. Rohini, V. Jamuna

“…The PV array is mathematically modeled and the system is simulated and the results are analyzed. …”
Get full text

Optimal Dynamics Control in Trajectory Tracking of Industrial Robots Based on Adaptive Gaussian Pseudo-Spectral Algorithm by Jing Zhang, Xiaokai Zhu, Te Chen, Guowei Dou

“…A pseudo-spectral control algorithm based on adaptive Gauss collocation point reconstruction is proposed to efficiently solve the optimal dynamics control problem of industrial robots. A mathematical model for the kinematic relationship and dynamic optimization control of industrial robots has been established. …”
Get full text

Deep Reinforcement Learning-based Trajectory Planning for Manipulator Obstacle Avoidance by Cao Yi, Guo Yinhui, Li Lei, Zhu Baiyu, Zhao Zhihua

“…Firstly, based on the mathematical model of the manipulator and the motion environment, the DOBOT robot and the operating environment are built in PyBullet, and the parameters such as the reward function, the action and the state variables required for DRL are set. …”
Get full text

Towards Analysis and Optimization of Electrospun PVP (Polyvinylpyrrolidone) Nanofibers by Utkarsh, Hussien Hegab, Muhammad Tariq, Nabeel Ahmed Syed, Ghaus Rizvi, Remon Pop-Iliev

“…Furthermore, a mathematical model was generated using response surface methodology (RSM) to model the electrospinning process. …”
Get full text

Design and Kinematics Analysis of the Wearable Lower Limb Exoskeleton by Wang Xiaowei, Chen Xu, Gao Shenglu

“…Secondly, the standard D-H method is used to build the exoskeleton kinematics mathematical model, the forward and inverse kinematics is solved through the homogeneous transformation matrix, and the correctness of the model and the solving equation is verified. …”
Get full text

An Investigation on Gas Lift Performance Curve in an Oil-Producing Well by Deni Saepudin, Edy Soewono, Kuntjoro Adji Sidarto, Agus Yodi Gunawan, Septoratno Siregar, Pudjo Sukarno

“…In this paper, we discuss a mathematical model for gas lift technique and the characteristics of the GLPC for a production well, for which one phase (liquid) is flowing in the reservoir, and two phases (liquid and gas) in the tubing. …”
Get full text

Analysis and Optimization of Tooth Surface Contact Parameter of ZC1 Worm Gear by Song Lijuan, Ji Weixi, Xie Jian, Wang Yu

“…Based on the meshing theory of ZC1 worm gear pair,the tooth surface contact parameters are analyzed by using MATLAB.The results show that the axial module,center distance,lead angle,radius of arc tooth profile of grinding wheel have great influence on tooth surface contact parameters.In general,the center distance is selected in the beginning of design,so the axial module,lead angle,radius of arc tooth profile of grinding wheel are selected as design variable.For improving the meshing performance of worm gear pair,taking the induced normal curvature and lubrication angle as objective function,and combining with the constraints of top thickness of worm,top thickness of worm wheel and undercutting,the optimum mathematical model is established.The improved particle swarm algorithm is adopted as optimization algorithm and the results show that the optimized lubrication angle is larger and induced normal curvature is smaller.The meshing performance of worm gear pair is improved effectively.…”
Get full text

Distance criterion-based quantizer design for cooperative spectrum sensing by Yuanhua FU, Zhiming HE

“…In terms of sensing node’s energy and reporting channel’s bandwidth constrains problem for cooperative spectrum sensing in cognitive radio networks,an optimal quantizer design method based on distance criterion was proposed.First of all,the Bhattacharyya distance of received quantized data at the fusion center (FC) was calculated as performance criteria,the optimization mathematical model of the quantizer was constructed,and the optimum quantization thresholds were obtained by using particle swarm optimization algorithm.According to received sensing nodes’ quantized data at the FC,a log-likelihood ratio detector was constructed to decide the presence or absence of primary user signal,the upper bound to sensing performance of energy detector that without quantization was derived.Compared with the existing methods in literatures,the performance of proposed 3-bit quantization method approaches to the upper bound performance of energy detector,under the premise of obtaining comparable detection performance,the requirement of communication bandwidth is reduced.…”
Get full text

Segment search for local extremums of images based on the analysis of brightness of adjacent homogeneous areas by V. Yu. Tsviatkou, Anh Tuan Nguyen

“…Morphological search algorithms provide the selection of non-strict extremes, but have a high computational complexity. A mathematical model and an algorithm based on the brightness analysis of adjacent homogeneous regions are proposed to isolate strict and non-strict local extremes of images with low computational complexity. …”
Get full text

Progressive Multifocal Liquid Lenses Based on Asymmetric Freeform Surface Structure of Nonuniform Thickness Elastic Membranes with Different Constraints by Weiliang Jia, Biao Zhang, Songjing Li

“…The structure and mathematical model of power distribution for the lens are introduced. …”
Get full text

Flight Stability of Canard-Guided Dual-Spin Projectiles with Angular Rate Loops by Qiushi Zheng, Zhiming Zhou

“…Firstly, the concept of the dual-spin projectile is introduced. Secondly, the mathematical model of the dual-spin projectile is established, and the angular motion equation is finally obtained by using some linearized assumptions. …”
Get full text

An Analysis of Infiltration in Furrow Irrigation Channels With Root Water Uptake by Suma Inna, Muhammad Manaqib, Vika Dwi Samudra, Ruly Erhandi

“…This study discusses infiltration in six irrigation channel types with root water uptake in four types of roots. The mathematical model for the infiltration problem is the Richards equation. …”
Get full text

Monitoring Model of Concrete Dam Deformation Based on Gray Wolf Optimization Algorithm by CHEN Shuyun, ZHOU Wenzhong, GU Yanchang, WANG Hong

“…Dam deformation is one of the most reliable indicators that can reflect the actual condition of concrete dam.Modeling and analysis of dam deformation monitoring data is an effective way to reflect the operation behavior of concrete dam and seek for the internal law of deformation.In addition,the mathematical model can be applied to predict the deformation.In order to improve the accuracy of modeling and deformation prediction,this paper proposes a deformation monitoring model of concrete dam based on gray wolf optimization algorithm,applies the model to the engineering examples and compares the results with that from the statistical model established by the conventional stepwise regression method and the BP-neural network.The results show that the monitoring model based on the gray wolf optimization algorithm has higher accuracy and better prediction effect.Therefore,the gray wolf algorithm is superior in establishing deformation model,which provides a new reference for deformation analysis and prediction of concrete dam.…”
Get full text

Modeling and prediction of HIV in China: transmission rates structured by infection ages by Yicang Zhou, Yiming Shao, Yuhua Ruan, Jianqing Xu, Zhien Ma, Changlin Mei, Jianhong Wu

“…Here we develop a generalframework of mathematical modeling that takes into account this heterogeneityof transmission rate and permits rigorous estimation of important parametersusing a regression analysis of the twenty-year reported HIV infection data inChina. …”
Get full text