Polarimetric Scattering from Two-Dimensional Dielectric Rough Sea Surface with a Ship-Induced Kelvin Wake by Pengju Yang, Lixin Guo

“…For both monostatic and bistatic configuration, simulation results indicate that electromagnetic scattering signatures in the presence of a ship wake dramatically differ from those without ship wake, which may serve as a basis for the detection of ships in marine environment.…”
Get full text

Design and Analysis of Combined Valve Spool with Linear Flow Coefficient by Changxiong Xie, Heng Su, Jun Yang, Zhongjing He

“…In order to improve the nonlinearity of the flow discharge, the paper designed different spool profile, such as the arc combined spool profile, the power curve combined spool profile, the index curve combined spool profile, and the mixed curve combined spool profile, and analyzed the flow discharge through CFD simulation and experiment. The results show that the flow discharge of the mixed curve combined spool is more linear and the residual sum of squares is the smallest, which is 2.56 × 10−3 under CFD numerical simulation and 3.26 × 10−4 under experiment. …”
Get full text

Effects of Hydrostatic Pocket Shape on the Flow Pattern and Pressure Distribution by M. J. Braun, M. Dzodzo

“…The flow in a hydrostatic pocket is numerically simulated using a dimensionless formulation of the 2-D Navier-Stokes equations written in primitive variables, for a body fitted coordinates system, and applied through a collocated grid. …”
Get full text

Hydro-wind-solar Complementary Operation Rules Considering System Reliability and Extreme Failure by JING Han, CHEN Xiang, MENG Hongwen, LIU Benxi

“…The uncertainty of renewable energy output and the vulnerability under extreme weather conditions have become more and more prominent in the safety of power grid operation.The study proposes a long-term complementary operation rule generation method for hydro-wind-solar power that considers both the guaranteed rate of power generation and the extreme failure.Considering the joint output guarantee rate and the extreme failure of the hydro-wind-solar system,the method takes the maximum power generation as the goal.It uses the mixed-integer nonlinear program to carry out long-term sequence simulation joint operation of hydropower,wind power,and solar power.On this basis,the grey relation analysis is applied to screen the input factors.With the output of each hydropower station as that of the network,the BP neural network is adopted to generate the hydro-wind-solar complementary operation rules.Finally,the validity of the proposed model is verified through case analysis.The superiority of the proposed model is further demonstrated through the simulation analysis of scenarios related to different wind and solar installed capacities and extreme failure.…”
Get full text

MapFuse: Complete and Realistic 3D Modelling by Michiel Aernouts, Ben Bellekens, Maarten Weyn

“…Validating a 3D indoor radio propagation model that simulates the signal strength of a wireless device can be a challenging task due to an incomplete or a faulty environment model. …”
Get full text

Modeling and Analysis of HIV and Cholera Direct Transmission with Optimal Control by Kumama Regassa Cheneke, Koya Purnachandra Rao, Geremew Kenassa Edessa

“…The optimal system is solved numerically using forward and backward sweep method of Runge Kutta’s fourth-order methods. The numerical simulations are plotted using MATLAB.…”
Get full text

Development and Performance Analysis of Pneumatic Soft-Bodied Bionic Actuator by Wenchuan Zhao, Yu Zhang, Ning Wang

“…The results show that the deformation analysis model and numerical simulation method are accurate, and the pneumatic soft-bodied bionic actuator is feasible and effective, which can provide a design method and reference basis for the research and implementation of soft-bodied bionic robot actuator.…”
Get full text

Automatic Transmission Clutch Engagement Control based on Improved NSGA-Ⅱ Algorithm by Yun Yu, Cuie Tang

“…Finally，the engagement speed and time of clutch are taken as the design variable，and the impact degree and sliding friction work are taken as the optimization objective function， and the simulation experiment is carried out. The simulation results show that the improved NSGA-Ⅱ algorithm has better Pareto front and faster convergence speed， and distribution is more uniform， obviously superior to the other two comparison algorithms， and the smaller impact degree and sliding friction work can be obtained by smoothly controlling the engagement speed of clutch in the condition of the same joint time，which provides technical support for the design of clutch engagement control strategy.…”
Get full text

Traffic Prediction of Space-Integrated-Ground Information Network Based on Improved LSTM Algorithm by Chengsheng PAN, Yufu WANG, Li YANG

“…The space-integrated-ground information network is easy to interrupt and the traffi c fl uctuation is not stable due to the problems of high traffi c burst and topological time-varying, which makes the traffi c prediction diffi cult much higher than the ground.In order to solve this problem, an improved LSTM algorithm was put forward.Firstly, the traffi c autocorrelation was judged by analyzd the infl uence of the lag variable of traffi c sequence on the predicted value; Secondly, the noise and breakpoint of the training set were eliminated by replacing the interruption with the predicted value; Finally, Dropout algorithm was used to reduce the impact of noise and neural network over fi tting, and accurately predict the traffi c data of the integrated intelligent network.The simulation results showed that in OPNET simulation environment, compared with other algorithms, the accuracy of this algorithm was improved by 59.21%, and the training speed of the algorithm was improved by 11.11%, which could provide eff ective data support for the overall scheduling of the integrated intelligent network.…”
Get full text

ESTABLISHMENT OF INTENSITY MODEL FOR LASER WELDING LINE AND PREDICTION OF FAILURE by ZHAN MinMin, DAI Xin, CAO Shu, YU JingHu

“…The comparison results indicate that the simulation with micro failure model not only gives the uniform strength evaluation, but also can predict the time and area for initial ductile. …”
Get full text

ENERGY ABSORPTION PROPERTIES OF AXIALLY LOADED METAL CIRCULAR TUBE UNDER IMPACT LOAD by HONG Xiang, YAO Song, GUO XingXing

“…At the same time,considering the influence of the initial geometric imperfections,the initial geometric deformation caused by pre-loading and boundary conditions,the corresponding control group was established in the finite element simulation. The simulation results are concluded as follows:（ 1） The deformation mode of the fixed end simply supported is more complex than the clamped case. …”
Get full text

An Iterative Determination Method of an Axial Deployment Force of a Lanyard-Deployed Coilable Mast in Local Coil Mode by Yu Liu, Liang Sun, Hai Huang, Xurui Zhao, Jiahao Liu, Yishi Qiao

“…To verify the correctness of the proposed method, a dynamic simulation of the coilable mast is carried out, and a microgravity test is performed. …”
Get full text

CS-communication integration method in IoT monitoring multiple phenomena by Chengcheng HAN, Li CHEN, Weidong WANG

“…The large-scale Internet of things with multi observation phenomenon uses orthogonal multiple access (OMA) mechanism to transmit the observation data of distributed nodes, which will cause great transmission delay and lead to the loss of timeliness of data.To cope with the heavy latency of observations due to OMA, an efficient scheme integrating compressed sensing (CS) technique with communication was proposed for large-scale Internet of things to monitor multiple phenomena.In this proposed scheme, the nodes monitoring different phenomena were assigned to different time durations for transmission.During the assigned time duration, all nodes concurrently transmitted observations to the fusion center (FC)for CS measurement, and the FC recovered observation by CS algorithms.To evaluate the performance of the proposed scheme, the achievable rate of the observed phenomena was derived, which was closely related to the time allocation of clusters.To further improve the performance, the optimization problems of time allocation were studied under the two objectives of maximizing the total rate and ensuring the fairness of observation.Finally, the performance was verified and analyzed by numerical simulation.The simulation results show that the achievable rate of observations for different phenomena is improved the proposed scheme significantly compared with OMA schemes.…”
Get full text

Performance Analysis of Large-Scale Digital Phased Array Mixed-ADC Receiver in Compact Space by ZHANG Yi, GAO Hang, MA Song, GUO Hongru, XIA Bin, ZHANG Chaoxian

“…Finally, the achievable rates of uniform linear arrays and uniform planar arrays under different mixed-ADC configurations were theoretically calculated and numerically simulated. The calculation and simulation results both indicated that optimizing the mixed-ADC configuration scheme could effectively improve the system achievable rate, and the conclusion could provide theoretical support for the design of high achievable rate mixed-ADC receivers in compact spaces.…”
Get full text

Optimal Design of Double-stage Wheel Hub Reducer System based on Fuzzy Theory by Xiong Yong

“…The simulation result met the design requirements,which verified the feasibility of the optimized design.…”
Get full text

Implementation of mathematics model in public health: Albanian case study by Besjana MEMA, Sabina TOSUNI

“…The study integrates the SIR model with real-world data, including vaccination rates and population statistics, to simulate the dynamics of the pandemic over a specified period. …”
Get full text

Planar Monopoles with Different Radiator Shapes for UWB Body-Centric Wireless Communications by Y. Y. Sun, S. W. Cheung, T. I. Yuk

“…The planar monopoles have the radiators with microstrip-fed line printed on one side of the substrate and a ground plane on the other side. Simulation studies show that, among these monopoles, the horizontal elliptical, vertical elliptical, and hexagonal monopoles have better overall performances in terms of bandwidth, gain, efficiency, and radiation pattern in free space. …”
Get full text

A Novel Methodology for Estimating the Capacity and Level of Service for the New Mega Elliptical Roundabout Intersection by Ahmed I. Z. Mohamed, Yusheng Ci, Yiqiu Tan

“…This intersection was developed in a previous paper using simulation data, and the authors found that it is better than interchange (full cloverleaf) in most scenarios of traffic flow. …”
Get full text

Analysis of the Impact of Magnetic Materials on Cogging Torque in Brushless DC Motor by K. Karthick, S. Ravivarman, Ravi Samikannu, K. Vinoth, Bashyam Sasikumar

“…With the presence of these three magnetic materials, the cogging torque is estimated independently using multiposition simulation. The multiposition is simulated using a transient application that runs at constant speed. …”
Get full text

Rolling Bearing Fault Diagnostic Method Based on VMD-AR Model and Random Forest Classifier by Te Han, Dongxiang Jiang

Get full text