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A decoupling method WITH DIFFERENT SUBDOMAIN TIME STEPS FOR THE NON-STATIONARY NAVIER-STOKES/DARCY MODEL

Journal of Computational Mathematics 2017年第3期35卷 319-345页

作者： Huiyong Jia Peilin Shi Kaitai Li Hongen Jia College of Mathematics Taiyuan University of Technology 030024 Tai'yuan China College of Mathematics Xi'an Jiaotong University 710049 Xi'an China School of Mathematics and Computational Science Xiangtan University 411105 Xiang'tan China

A decoupling method with different subdomain time steps for the non-stationary Navier- Stokes/Darcy model is formulated and analyzed. The method has asynchronous time steps, which adopt small time steps in the fluid region and large time steps in the porous region. It saves relatively large amount of CPU time. Stability and convergence of the method are proved. The numerical results are presented to illustrate the features of the proposed method.

关键词： decoupling method Navier-Stokes/Darcy model Asynchronous time steps.

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NUMERICAL ANALYSIS OF A BDF2 MODULAR GRAD-DIV STABILITY method FOR THE STOKES/DARCY EQUATIONS

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Acta Mathematica Scientia 2022年第5期42卷 1981-2000页

作者：王江珊孟令雄贾晓峰贾宏恩 College of Mathematics Taiyuan University of TechnologyTai'yuan 030024China School of Mathematics and Statistics Wuhan UniversityWuhan 430072China

In this paper,a BDF2 modular grad-div algorithm for the Stokes/Darcy model is constructed.This method not only effectively avoids solver breakdown,but also increases computational efficiency for increasing parameter values.Herein,complete stability and error analysis are provided.Finally,some numerical tests are proposed to justify the theoretical analysis.

关键词： Stokes/Darcy model decoupling method BDF2 modular grad-div

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An interpolation decoupling method of multi-sensor information based on variance

An interpolation decoupling method of multi-sensor informati...

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The 2011 International Conference on Advanced Materials and Information Technology Processing(AMITP 2011)

作者： Ye Ting-dong Liu Gui-xiong Computer Department Guangdong Industry Technical College School of Mechanical & Automotive Engineering South China University of Technology

In order to solve decoupling problem of homogeneous multi-sensor information which couples with other sensor’s information, the paper proposed an interpolation decoupling method of multi-sensor inform

ISBN: (纸本)9783037851579

关键词： Interpolation Variance decoupling Scale threshold multi sensor Variance decoupling method information decoupling Interpolation accuracy of measurement

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A Broad Range Triboelectric Stiffness Sensor for Variable Inclusions Recognition

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Nano-Micro Letters 2023年第12期15卷 298-309页

作者： Ziyi Zhao Zhentan Quan Huaze Tang Qinghao Xu Hongfa Zhao Zihan Wang Ziwu Song Shoujie Li Ishara Dharmasena Changsheng Wu Wenbo Ding Tsinghua‑Berkeley Shenzhen Institute Institute of Data and InformationShenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055People’s Republic of China Institute of Ocean Engineering Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055People’s Republic of China Wolfson School of Mechanical Electrical and Manufacturing Engineering Loughborough UniversityLoughborough LE113TUUK Department of Materials Science and Engineering National University of SingaporeSingapore 117575Singapore RISC-V International Open Source Laboratory 518055 ShenzhenPeople’s Republic of China

With the development of artificial intelligence,stiffness sensors are extensively utilized in various fields,and their integration with robots for automated palpation has gained significant attention.This study presents a broad range self-powered stiffness sensor based on the triboelectric nanogenerator(Stiff-TENG)for variable inclusions in soft objects detection.The Stiff-TENG employs a stacked structure comprising an indium tin oxide film,an elastic sponge,a fluorinated ethylene propylene film with a conductive ink electrode,and two acrylic pieces with a shielding layer.Through the decoupling method,the Stiff-TENG achieves stiffness detection of objects within 1.0 s.The output performance and characteristics of the TENG for different stiffness objects under 4 mm displacement are analyzed.The Stiff-TENG is successfully used to detect the heterogeneous stiffness structures,enabling effective recognition of variable inclusions in soft object,reaching a recognition accuracy of 99.7%.Furthermore,its adaptability makes it well-suited for the detection of pathological conditions within the human body,as pathological tissues often exhibit changes in the stiffness of internal organs.This research highlights the innovative applications of TENG and thereby showcases its immense potential in healthcare applications such as palpation which assesses pathological conditions based on organ stiffness.

关键词： Stiffness sensor decoupling method Heterogeneous stiffness Variable inclusions Healthcare applications

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Fragility analysis for vehicle derailment on railway bridges under earthquakes

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Railway Engineering Science 2022年第4期30卷 494-511页

作者： Zhibin Jin Weizhan Liu Department of Bridge Engineering Southwest Jiaotong UniversityChengdu 610031China

With the rapid development of high-speed railways around the globe,the safety of vehicles running on bridges during earthquakes has been paid more attention to.In the design of railway bridges,in addition to ensuring the safety of the bridge structure in earthquake,the vehicle safety should also be ensured.Previous studies have focused on the detailed analysis of vehicle derailment on bridges,proposing complex numerical algorithms for wheel-rail contact analysis as well as for parametric analysis,but they are inconvenient for designers.Intensity measure(IM)used in performance-based earthquake engineering is introduced in this study.A method to evaluate the vehicle safety on bridges under earthquakes is proposed with respect to the optimal IM.Then,the vehicle derailment case of the Kumamoto earthquake in Japan verifies the decoupling method of vehicle-bridge interaction model.In the assessment of vehicle derailments,eight IMs are systematically compared:the IMs of bridge deck motion are generally better than those of ground motion;the variation coefficient of spectral intensity of the bridge deck is the smallest at different frequencies.Finally,the derailment fragility cloud map is presented to evaluate the vehicle safety on bridges during earthquakes.

关键词： Vehicle-bridge interaction model decoupling method Earthquake Vehicle derailment Intensity measure

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