Showing 20,501 - 20,520 results of 22,513 for search '"Mathematics"', query time: 0.10s Refine Results
  1. 20501

    Discrete Dynamic Modeling Analysis of Rural Revitalization and Ecotourism Sustainable Prediction Based on Big Data by Yao Tang

    Published 2022-01-01
    “…In view of this situation, this paper uses the mathematical algorithm of BP neural network to simulate the structure of brain neural network to deal with this kind of nonlinear relationship problem. …”
    Get full text
    Article
  2. 20502

    Performance Prediction Model of Dynamic Pressure Oil-Air Separator by Xiaobin Zhang, Lei Lang, Xiaofeng Zhang, Hongqing Lv, Na Gao

    Published 2021-01-01
    “…Based on the aeroengine lubricating oil system test bench, this paper used a dimensional analysis method to establish a mathematical model for predicting the separation efficiency and resistance of a dynamic pressure oil-air separator suitable for engineering. …”
    Get full text
    Article
  3. 20503

    Prediction of the Compressive Strength of Concrete Admixed with Metakaolin Using Gene Expression Programming by Oluwatobi O. Akin, Amana Ocholi, Olugbenga S. Abejide, Johnson A. Obari

    Published 2020-01-01
    “…One of the problems of optimization of concrete is to formulate a mathematical equation that shows the relationship between the various constituents of concrete and its properties. …”
    Get full text
    Article
  4. 20504

    Adsorption Equilibria of Natural Gas Components on Activated Carbon: Pure and Mixed Gas Isotherms by R.E. Bazan, M. Bastos-Neto, R. Staudt, H. Papp, D.C.S. Azevedo, C.L. Cavalcante

    Published 2008-06-01
    “…In this study, measurements of experimental data for the adsorption equilibria of binary mixtures of CH 4 with C 2 H 6 , CO 2 , C 3 H 8 and N 2 — as obtained in a volumetric/chromatographic set-up — are presented and compared with mathematical models for multi-component adsorption based on pure component adsorption data. …”
    Get full text
    Article
  5. 20505

    Instability Condition Derivation for Hydraulic AGC System under Pressure Closed-Loop Control by Yong Zhu, Guangpeng Li, Shengnan Tang, Wanlu Jiang, Pengfei Qian, Zhi Zheng, Zhijian Zheng

    Published 2021-01-01
    “…In this work, for each component of the HAGC system, the mathematical model was established. And on the basis of the linking relation of various elements, we derived the incremental transfer model of the PCL system. …”
    Get full text
    Article
  6. 20506

    Research on High-Precision Attitude Control of Joint Actuator of Three-Axis Air-Bearing Test Bed by Zhiming Chen, Zhouhuai Luo, Yunhua Wu, Wei Xue, Wenxing Li

    Published 2021-01-01
    “…A combined actuator including flywheel, air-conditioner thruster, and automatic balancing device is designed, and a hierarchical saturation PD control algorithm is proposed to improve the control accuracy and anti-interference ability of the three-axis air-bearing test bed. Finally, the mathematical simulation of the proposed control algorithm is carried out, and the physical verification is carried out on the three-axis air-bearing test bed. …”
    Get full text
    Article
  7. 20507

    Development of Wrist Rehabilitation Device based on Coaxial Spherical Parallel 3RRR Mechanism by Shuaixu Ji, Yongguo Liang, Huimin Hao, Li'na Li, Jiahai Huang

    Published 2021-10-01
    “…On this basis,the inverse kinematics mathematical model of the wrist rehabilitation device is established,and the relationship between the motor input angle and the output pose of the robot end is obtained,and the robot working space is determined,the maximum angle of rotation around the <italic>X</italic> axis is 32°,the maximum angle of rotation around the <italic>Y</italic> axis is 37°,and the full rotation around the <italic>Z</italic> axis. …”
    Get full text
    Article
  8. 20508

    Prediction and optimizing residual stress profile induced by cold expansion in aluminum alloys using experimental design by Abdelkader Miloudi, M. Laredj, A. Lousdad, B. Benguediab

    Published 2019-03-01
    “…Moreover, the proposed mathematical models were used to determine the optimal values of the various factors for the residual stress profiles prediction at any factor values, in order to achieve maximum service life after repair of a cracked structure or to delay crack initiation and growth in riveted or bolted structures. …”
    Get full text
    Article
  9. 20509

    Dynamic Reactive Power Optimization Strategy for AC/DC Hybrid Power Grid Considering Different Wind Power Penetration Levels by Nan Feng, Yuyao Feng, Yun Su, Yajun Zhang, Tao Niu

    Published 2024-01-01
    “…Firstly, a detailed mathematical model of the AC/DC hybrid system is established. …”
    Get full text
    Article
  10. 20510

    Analysis of Total Suspended Solid at Merah Putih Beach, Bangkalan Regency by Dwi Putra Ardhana Satria, Dwi Siswanto Aries

    Published 2025-01-01
    “…The advanced empirical modelling tests reveal the Polynomial mathematical equation had a smaller RMSE and a larger R square of 82,34 mg/l and 0.4468. …”
    Get full text
    Article
  11. 20511

    Mechanistic Features of Nanodiamonds in the Lapping of Magnetic Heads by Xionghua Jiang, Zhenxing Chen, Joy Wolfram, Zhizhou Yang

    Published 2014-01-01
    “…This is the first study to develop mathematical models for nanodiamond embedment. Such models can predict the optimum parameters for particle embedment. …”
    Get full text
    Article
  12. 20512

    Heuristic Algorithm for Cross-Platform Credit Risk Transmission Based on Hybrid Strategies by Zhang Xiaodong, Shen Hong, Wang Tao, Li Yazhi

    Published 2022-01-01
    “…Besides, a novel community model is applied to predict the credit risk areas in advance. In detail, the mathematical association structure between credit entities is firstly given in the algorithm, and the breadth first search algorithm is used to find the hierarchical nodes on the credit risk transmission paths. …”
    Get full text
    Article
  13. 20513

    Performance Assessment of Hybrid Fibre-Reinforced Concrete (FRC) under Low-Speed Impact: Experimental Analysis and Optimized Mixture by Abbas Sadeghian, Taleb Moradi Shaghaghi, Yaghoub Mohammadi, Hossein Taghipoor

    Published 2023-01-01
    “…In addition, the calculated R2 values and normal probability graphs showed a fairy accurate correlation between the results of the experimental and mathematical approaches. Finally, this study evaluated the fracture surface, adhesion of the fibres to the concrete, and degradation modes of the fibres to pave the way for optimal utilization of these hybrid FRCs.…”
    Get full text
    Article
  14. 20514

    Wheel and Shoe Composite Stair Climbing Wheelchairs and Dynamic Analysis of Wheel Shoe Switching by Zhu Hua, Ge Haiwen

    Published 2023-12-01
    “…In response to the current issues of wheel and shoe composite ladder wheelchairs, such as tire interference with the track, and collision between the wheelchair and the top platform during ladder climbing, a wheel shoe composite stair climbing wheelchair with a swing arm track chassis as the stair climbing mechanism and a new wheel shoe switching scheme is designed. Its mathematical model is established, the centroid coordinates, the vertical displacement curve of the center of mass for climbing stairs are analyzed, and the dynamic change curve of the swing arm motor and electric push rod during the four stages of wheel shoe switching are obtained. …”
    Get full text
    Article
  15. 20515

    Research on the spatial state and electrical distance variation of overhead transmission lines with changes in foundation by Shuai Wang, Xiaokai Meng, Siqing Xu, Zhumao Lu, Yang Bai

    Published 2025-01-01
    “…These factors include the degree of tower sinking, the elasticity and tension of the overhead lines, the positions and heights of adjacent towers, wind force, temperature, and other environmental elements. A mathematical model was developed to describe the positional changes of overhead lines following tower sinkage, and formulas were used to calculate the new suspension point positions and electrical distance variations of the wires. …”
    Get full text
    Article
  16. 20516

    Considering the Carbon Penalty Rates to Optimize the Urban Distribution Model in Time-Varying Network by Yuanyuan Ji, Shoufeng Ji, Tingting Ji

    Published 2022-01-01
    “…In this paper, the time-varying network in urban distribution is mathematically described and calculated. By considering the carbon penalty rate, the distribution optimization model is analyzed to formulate the optimal urban distribution scheme for enterprises. …”
    Get full text
    Article
  17. 20517

    A Simple Method to Design and Analyze Dynamic Vibration Absorber of Pipeline Structure Using Dimensional Analysis by Mehrdad Shemshadi, Mahdi Karimi, Farzad Veysi

    Published 2020-01-01
    “…A beam-based dynamic vibration absorber (beam DVA) is a device comprising an L-shaped beam with a concentrated mass at its free end that can be used to absorb and dissipate vibrations in the pipeline. In this paper, a mathematical equation is extracted to design the beam DVA using the dimensional analysis (DA) method and data recorded from 120 experimental tests. …”
    Get full text
    Article
  18. 20518

    A new efficient genetic algorithm-Taguchi-based approach for multi-period inventory routing problem by Amin Farahbakhsh, Amir Saman Kheirkhah

    Published 2023-12-01
    “…In this paper, we present a mathematical model and a novel genetic algorithm for solving the multi-period inventory routing problem. …”
    Get full text
    Article
  19. 20519

    Structural Design and Kinematic Analysis of a 10-DOF Exoskeleton Rehabilitation Robot by Guoqiang Ge, Weifeng Zhang, Jinghan Li, Hui Wang

    Published 2022-08-01
    “…Simulation research shows that the structural design scheme and mathematical model of the exoskeleton rehabilitation robot are feasible and correct.…”
    Get full text
    Article
  20. 20520

    How Influential Are Mental Models on Interaction Performance? Exploring the Gap between Users’ and Designers’ Mental Models through a New Quantitative Method by Bingjun Xie, Jia Zhou, Huilin Wang

    Published 2017-01-01
    “…A total of 32 college students participated and their performance was recorded. Through mathematical analysis of the results, three findings were derived. …”
    Get full text
    Article