Showing 20,001 - 20,020 results of 22,513 for search '"mathematics"', query time: 0.17s Refine Results
  1. 20001

    Research on the Overtopping-Induced Breaching Mechanism of Tailings Dam and Its Numerical Simulation by Zhao Deng, Shiqiang Wu, Ziwu Fan, Zhikun Yan, Jingxiu Wu

    Published 2019-01-01
    “…Based on the centrifugal test results, considering the special physical and mechanical properties of tailings, a mathematical model for tailings dam breaching is established. …”
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  2. 20002

    FORMALIZATION OF THE PROBLEM OF SELECTION OF AUTOMATED SYSTEM by A. V. Petukhov

    Published 2018-06-01
    “…Qualitative assessment is based on the theory of choice and decision making, which examines the mathematical models of this type of activity. In view of the fact that in the problem under consideration, many alternatives, which are automated systems, are known, it can be related to the choice problem. …”
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  3. 20003

    SHAPE OPTIMIZATION DESIGN OF THE UNDERWATER GLIDER BASED ON SURROGATE OPTIMAL ALGORITHM (MT) by YU Zhen, FAN ZhiHua, SHI HongYu, LI ZhiHua

    Published 2023-01-01
    “…The proposed algorithm, the maximum expected improvement(EI) criterion multiple expectation of improvement(q-EI) and the improved probability improvement(IPI) are combined through a mathematical example. The result shows that the proposed algorithm converges faster and has higher accuracy. …”
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  4. 20004

    Study on the Mechanism of Tooth Breakage Fault in Gear Rotor System Under Load Excitation by Haihan Zhang, Fang Ren, Jinhao Feng

    Published 2020-08-01
    “…Because of the time-varying meshing stiffness of gears and the unbalance of the rotor system, the coupling mathematical model of the gear rotor system is established based on the rotor dynamics and Lagrange equation, and the simulation model is established in Matlab/Simulink. …”
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  5. 20005

    Recognition method based on hesitant fuzzy set for unequal length sequences and its application by Shuangming LI, Xin GUAN, Guidong SUN

    Published 2021-07-01
    “…Aiming at the problem that unequal length sequences were difficult to recognize, a recognition method based on hesitant fuzzy distance measure was proposed.Firstly, the problem was described from the perspective of fuzzy value, and the hesitant fuzzy information recognition model of unequal length sequence was established by lattice closeness degree.Secondly, the mean value, variance, relative range and hesitancy degree of hesitant fuzzy values were defined.Combined with membership difference of the shorter part, the generalized integrated feature distance measure and the generalized weighted integrated feature distance measure were defined to meet relevant properties of metric space, and the strict mathematical proof process was given.Finally, entropy measure and support measure were proposed to determine the weight, and the VIKOR recognition method based on hesitant distance measure was given.The simulation results verify the effectiveness and feasibility of proposed method from numerical examples, energy strategy selection and target recognition respectively.…”
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  6. 20006

    A Copula-Based and Monte Carlo Sampling Approach for Structural Dynamics Model Updating with Interval Uncertainty by Xueqian Chen, Zhanpeng Shen, Xin’en Liu

    Published 2018-01-01
    “…A FE model updating approach in structural dynamics with interval uncertain parameters is proposed in this work. Firstly, the mathematical relationship between the updating parameters and the output interesting qualities is created based on the copula approach and the vast samples of inputs and outputs are obtained by the Monte Carlo (MC) sampling technology according to the copula model. …”
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  7. 20007

    COMPLEX METHOD OF SEEKING THE MAXIMUM OF NON-NEGATIVE FUNCTION OF TWO VARIABLES by ZHANG Jing, SHI WenPu

    Published 2018-01-01
    “…On one hand,the conclusions obtained in this paper can be directly used to solve the optimization problem in which the analytic function theory could be used,on the other hand,it can be used to obtain the global optimization solutions of the two-dimension mathematical optimization problems in which the method could be used in a high precision and high effective manner.…”
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  8. 20008

    Analysis and Enhancements of a Prolific Macroscopic Model of Epilepsy by Christopher Fietkiewicz, Kenneth A. Loparo

    Published 2016-01-01
    “…A reformulated system is developed to support proper methodology. (3) We explain an unreported contradiction in the published model specification regarding the use of a mathematical reduction method. We then use the method to reduce the number of equations and further improve the computational efficiency. …”
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  9. 20009

    Pricing of American Carbon Emission Derivatives and Numerical Method under the Mixed Fractional Brownian Motion by Yuling Wang, Jing Wang

    Published 2021-01-01
    “…In conclusion, since mfBm is a well-developed mathematical model of strongly correlated stochastic processes, this model will be an efficient model for pricing carbon financial derivative.…”
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  10. 20010

    Research on Recognition, Positioning and Grasping of Robotic Arms Based on an Improved ORB Algorithm by Li Xinyan, Zhou Min

    Published 2024-10-01
    “…Firstly, the improved ORB algorithm was used to identify the target, and then the target was positioned according to the binocular stereo vision optical axis parallel model. Then, the mathematical model of the robotic arm was established by using the standard D-H parameter method, and the inverse kinematics was solved. …”
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  11. 20011

    3D limit analysis of masonry pavilion domes on octagonal drum subjected to vertical loads by Carlalberto Anselmi, Filomena Galizia, Eduardo Saetta

    Published 2020-01-01
    “…By using the static theorem applied to the dome discretized in rigid macro-blocks of variable shape aligned along parallels and meridians, a mathematical model have been constructed in order to search for the load collapse multiplier, and thus to evaluate the degree of structural safety. …”
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  12. 20012

    Analysis of Pulse System Dynamics of Phase Synchronization in Multiple Capture Mode by A. L. Shilina

    Published 2003-08-01
    “…The paper considers a model, a method and an algorithm of the simulation of the pulse system dynamics of phase synchronization in the multiple capture mode. Mathematical description of the devices is based on the method of space and state variables and makes it possible to take into account not only pulse and non-linear characteristics of these systems but also their various operational modes including multiple captures. …”
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  13. 20013

    Design of beamforming for IRS multi-partition-aided THz multi-subarray by Zufan ZHANG, Rui TANG

    Published 2023-08-01
    “…In the IRS-aided THz communication system, in order to break the channel sparsity limitation on the system spatial multiplexing gain, a hybrid beam forming architecture with wide-spaced multi-subarrays at the transceiver/transmitter side was proposed and the transmission scheme of IRS multi-partition-aided THz multi-subarrays was designed.Firstly, a non-convex objective function with multivariate coupling and non-convex constraints was constructed based on the principle of maximizing spectrum efficiency.Then, the optimization problem was decoupled into two easy-to-solve sub-problems, namely, the reflection coefficient matrix design of IRS and the hybrid beamforming matrix design at the transceiver/receiver.Finally, the Riemannian manifold optimization algorithm was used to calculate the reflection coefficient matrix of IRS, and the closed solution of the hybrid beamforming matrix design at the transceiver/receiver was obtained through mathematical derivation.Simulation results show that compared with the baseline scheme, the proposed scheme can achieve better spectrum efficiency.…”
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  14. 20014

    Urban Land Value Estimation Model based on Income Capitalization Method by Sugito Nanin Trianawati, Affriani Asri Ria, Ramadhani Anisa Nabila Rizki

    Published 2024-01-01
    “…This research employs geostatistical analysis to model land values. The mathematical model developed through geostatistical analysis aims to represent actual land values accurately and facilitate the establishment of land value zones.…”
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  15. 20015

    Research Progress on Monitoring and Regulation of Closed Solid-State Fermentation Systems by ZHANG Nan, CHENG Siyuan, YU Yongjian, DOU Shuaiwei, LIU Jiaxin, TANG Ruijun, ZHU Yuanyuan, YU Zhen

    Published 2025-01-01
    “…In this paper, the monitoring methods for closed solid-state fermentation systems are reviewed from three perspectives: the application of various monitoring equipment and methods, the development of various mathematical models and control strategies, and the optimization of monitoring equipment using various control strategies. …”
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  16. 20016

    Complexity Analysis of a Mixed Memristive Chaotic Circuit by Xiaolin Ye, Jun Mou, Chunfeng Luo, Feifei Yang, Yinghong Cao

    Published 2018-01-01
    “…In this paper, we design a chaotic circuit with memristors, which consists of two flux-controlled memristors and a charge-controlled memristor, and the dimensionless mathematical model of the circuit was established. Using the conventional dynamic analysis methods, the equilibrium point set and stability of the chaotic system were analyzed, and the distribution of stable and unstable regions corresponding to the memristor initial states was determined. …”
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  17. 20017

    Dark Signals in the Choroidal Vasculature on Optical Coherence Tomography Angiography: An Artefact or Not? by Rui Hua, Hailin Wang

    Published 2017-01-01
    “…Optical coherence tomography angiography (OCTA) based on mathematical processing of sequentially acquired structural OCT images has been applied widely in both retinal and choroidal research and may have advantages over traditional angiography. …”
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  18. 20018

    A deep neural network for general scattering matrix by Jing Yongxin, Chu Hongchen, Huang Bo, Luo Jie, Wang Wei, Lai Yun

    Published 2023-04-01
    “…The scattering matrix is the mathematical representation of the scattering characteristics of any scatterer. …”
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  19. 20019

    Method for Information Security Events Detection in a Cloud Signature Systems by V. A. Gerasimov, O. V. Boyprav

    Published 2024-06-01
    “…It is recommended to base the method on the mechanisms of mathematical statistics in relation to the listed parameters. …”
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  20. 20020

    LINEAR FILTERING OF OUTPUT DATA OF A SINGLE-POSITION SECURITY SYSTEM by B. A. Zaikin

    Published 2017-10-01
    “…A geometric construction of a single-position security system, its mathematical description and formulas of Markov sequence that describes the motion of an object under observation are given. …”
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