Wireless sensor node localization based on IPSO-MC by Yongyan LI, Jianping WU

“…To solve the problem of insufficient node positioning accuracy in wireless sensor networks,an algorithm based on improved particle swarm optimization by membrane computing (IPSO-MC) was proposed.Kent mapping was used to initialize the population and domain particles were introduced to improve the global optimization of the particle swarm.The weight factor and nonlinear extreme value perturbation were used to improve the local optimization ability of the particle swarm,and the Levy flight mechanism was used to optimize the individual position.Finally,the optimal solution of the particle swarm algorithm was obtained by the evolutionary rules of the membrane computing.Simulation experiments show that compared with the chicken flock algorithm,the improved particle swarm algorithm and the membrane computing,the proposed algorithm improves 3.24%,5.12% and 8.15% in the comparison of reference node ratio indicators,and the increase in the number of nodes indicators by 2.26%,7.82% and 9.81%,and the comparison of communication radius indicators increased by 2.15%,5.5% and 7.5%,respectively.This indicates that the algorithm has a good effect in node localization.…”
Get full text

Double array system identification research based on LSTM neural network by Chunhua Gao, Mingyang Wang, Yifei Sima, Zihan Yuan

“…To efficiently address the complex nonlinear problems associated with earthquake simulation shaking array systems, this paper proposes the identification of the earthquake simulation shaking array system using the Long Short-Term Memory (LSTM) algorithm. …”
Get full text

Research of Curve Passing Performance of Track Car in Vehicle Group Chain Conveyor based on SIMPACK by Yang Li, Yaocheng Zhang, Zhaojian Yang, Xianglei Li

“…Curve passing performance at curve working conditions is studied. A nonlinear dynamics model of the conveyor track group passing the curve is established and analyzed. …”
Get full text

A Mathematical Algorithm of Locomotive Source Localization Based on Hyperbolic Technique by Homayun Kabir, Jeevan Kanesan, Ahmed Wasif Reza, Harikrishnan Ramiah

“…However, estimating the location of an emitter based on hyperbolic measurements is a highly nonlinear problem with inconsistent data, which are created due to the measurement noise, the deviation between assumption model and actual field of the velocity, and so forth. …”
Get full text

Gear Tooth Contact Analysis of Cycloidal Pinwheel Transmission Mechanism of RV Reducers by Han Ju, Zhang Weichang

“…To clarify the dynamic contact characteristics between the cycloidal gear teeth and the needle teeth, as well as between the roller needles and the inner and outer rings of the crankshaft bearing, based on the meshing principle of the cycloidal needle gear transmission mechanism, the kinematic characteristics of the gear tooth clearance and meshing points under six different tooth profile modification methods are analyzed; combining the static equilibrium equation and deformation coordination conditions, the nonlinear Hertz contact stiffness is introduced and a three-dimensional dynamic load-bearing contact analysis model of the cycloidal needle gear transmission mechanism is established. …”
Get full text

Timing evolution and prediction of Internet transmission behavior by He TIAN, Hai ZHAO, Jinfa WANG, Chuan LIN

“…The transmission behavior of Internet plays an importance role in the research on the relationship between network topology structure and dynamic behavior.Selecting effective path samples in four monitoring points which from different regions authorized by CAIDA_Ark project and statistics network traveling time and traveling diameter,their correlation is very weak,network traveling time is presented on multi-peak and heavy tail distribution.Using nonlinear time sequences analysis method to identify the Chaos characteristics of network traveling time evolution sequences.The results show that their timing evolution has Chaos characteristics.Based on this,the Logistic equation was lead to establish network transmission behavior prediction model,and particle swarm optimization (PSO) was used to optimize model parameters.The model by the network traveling time sequences of four monitoring points was experimented,evaluated it from accuracy and availability,the results show that the model can predict network transmission behavior accurately in the short term.It can be used as a tool for predicting the network behaviors’ evolution in a period of time.…”
Get full text

Smart resetting: An energy-efficient strategy for stochastic search processes by Ofir Tal-Friedman, Tommer D. Keidar, Shlomi Reuveni, Yael Roichman

“…We extend our findings in two ways: first, by examining nonlinear energetic cost functions, and second, by considering smart resetting of drift-diffusion processes.…”
Get full text

RESEARCH ON KINEMATIC CALIBRATION METHOD OF THREE DEGREE OF FREEDOM SERIES MANIPULATOR BASED ON BALLBAR by CHE YaXiao, YANG XinGang, GAO Feng, HUANG YuMei, HAN WenTao, GAO Heng

“…After the zero position calibration of the manipulator,measurement data used in calibration process is obtained by one time ballbar installation.An error identification model is built based on the geometric constraints of closed kinematic chain—composed of the manipulator and ballbar as well as the end position error model,then the manipulator geometric parameters errors are calculated using nonlinear least square iterative method. A calibration experiment is completed,and the errors of the manipulator are compensated by integrated error compensation method. …”
Get full text

The Shock Characteristics of Tilted Support Spring Packaging System with Critical Components by An-Jun Chen

“…The nonlinear dynamical equations of tilted support spring packaging system with critical components were obtained under the action of half-sine pulse. …”
Get full text

Analysis and Prediction of Body Test Results Based on Improved Backpropagation Neural Network Algorithm by Zhanju Ma, Yao Wang

“…Based on BP neural network, an algorithm for predicting students’ endurance performance is proposed, which is applied to the sunshine long-distance intelligent sports testing system at Hangzhou Dianzi University. The nonlinear relationship between students’ performance in sunshine running and endurance performance is determined, and students’ performance in sunshine running is used to predict their endurance performance the following year. …”
Get full text

Hydraulic Simulation of Leakage in Post-Earthquake Water Supply Pipeline Network and Its Algorithm Improvement by Tianyang Yu

“…The linear search and backtracking algorithm was used to control the iterative step size of the nonlinear equations of the pipe network nodes, which ensures the global convergence of the low-pressure hydraulic analysis of the pipe network.…”
Get full text

IMPROVED ALGORITHM FOR QUASI-STATIC SOLUTION OF HIGH SPEED ANGULAR CONTACT BALL BEARING by GAO Feng, HE PingPing, LI Yan, SHUI LinQi

“…Firstly,the intermediate variables are introducd to reduce the number of unknowns and the nonlinear equations are solved with step algorithm by which it’s ease to select the initial value. …”
Get full text

Navigating Deeply Uncertain Tradeoffs in Harvested Predator-Prey Systems by Antonia Hadjimichael, Patrick M. Reed, Julianne D. Quinn

“…The complex ecological interactions implied by different parameterizations of such systems yield highly complex and nonlinear dynamic properties with multiple distinct basins of attraction. …”
Get full text

Relationship between Urban Innovation Capability and Energy Utilization Efficiency: An Empirical Study of 281 Prefecture-Level Cities in China by Wanshu Wu, Kai Zhao

“…Following a dynamic nonlinear perspective, this study explores the relationship between urban innovation capability and energy utilization efficiency by employing the Panel Vector Autoregression (PVAR) and Dynamic Panel Threshold Regression (DPTR) methods. …”
Get full text

Picture Fuzzy Ideals of Near-Rings by Awais Asif, Hassen Aydi, Muhammad Arshad, Abdul Rehman, Usman Tariq

Get full text

Two-Dimensional CFD Modeling of Hysteresis Behavior of MR Dampers by Pengfei Guo, Jing Xie

“…So far, most previous studies on the nonlinear hysteresis analysis of ER/MR dampers have been limited to one-dimensional modeling techniques. …”
Get full text

Numerical modelling of intergranular fracture in polycrystalline materials and grain size effects by M. Paggi, P. Wriggers

“…In this paper, the phenomenon of intergranular fracture in polycrystalline materials is investigated using a nonlinear fracture mechanics approach. The nonlocal cohesive zone model (CZM) for finite thickness interfaces recently proposed by the present authors is used to describe the phenomenon of grain boundary separation. …”
Get full text

OPTIMIZATION OF REDUCER OF VERTICAL BUCKET ELEVATOR BASED ON IMPROVED NORTHERN GOSHA WK OPTIMIZATION by LIU Ling, JIANG QuanXin

“…In order to obtain the optimal solution of reducer efficiently, an improved northern goshawk optimization algorithm based on sprint decisive strategy is proposed. Two classical nonlinear constrained engineering examples of pressure vessel and cantilever beam are used to verify the performance of the improved northern goshawk algorithm. …”
Get full text

Fixed-Time Trajectory Tracking Control of Autonomous Surface Vehicle with Model Uncertainties and Disturbances by Jiawen Cui, Haibin Sun

“…By combining the FTDO and ISMC techniques, a new control scheme (FTDO-ISMC) is developed, which can achieve both disturbance compensation and chattering-free condition. (3) Aiming at reconstructing the unknown nonlinear dynamics and external disturbances, a fixed-time unknown observer (FTUO) is proposed, thus providing the FTUO-ISMC scheme that finally achieves trajectory tracking of ASVs with unknown parameters. …”
Get full text

Vibration Characteristic Analysis of Spur Gear System with Coupled Damage by Li Xike Wang Jian Chen Tao Zhang Jun

“…As a conventional form of gear failure，crack-wear coupled damage dramatically changes the vibration characteristics of a gear transmission system .In order to verify the influences of the coupled damage on the vibration characteristics of the transmission system，a dynamics model of spur gear transmission system，in which included the effect of crack and wear，is established，and its vibration analysis is carried out. Firstly，the nonlinear dynamics model of spur gear transmission system is established by means of lumped parameter method，the influence of tooth crack on mesh stiffness of gear pair is analyzed based on potential energy method. …”
Get full text