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检索条件"任意字段=2021 International Conference on Applied Mathematics, Modeling and Computer Simulation, AMMCS 2021"

共 646 条记录，以下是81-90 订阅

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Research on Rollover Threshold Value of Tank Truck Based on ADAMS CAR, SIMULINK and FLUENT Co-simulation 3

Research on Rollover Threshold Value of Tank Truck Based on ...

引用

3rd international conference on applied mathematics, modeling and computer simulation, ammcs 2023

作者： Xu, Xiaodong Deng, Guide Feng, Heyi Duan, Linlin Liu, Cenfan Yang, Zhirong Key Laboratory of Special Equipment Safety and Energy-saving for State Market Regulation China Special Equipment Inspection and Research Institute Beijing100029 China

ISBN: (纸本)9781643684581

This paper overcomes the traditional simulation method which does not consider the coupling effect between tank truck movement and liquid sloshing in the rollover process, simulates the rollover process of tank truck more truly, and calculates the critical value of tank truck rollover more accurately. The data interaction between ADAMS CAR and FLUENT is realized indirectly by using SIMULINK as the intermediate transfer software. Through the secondary development of UDF and S function, data exchange between FLUENT and SIMULINK is realized by means of socket communication. ADAMS CAR transmits the translation velocity and angular velocity of the tank truck to FLUENT, and FLUENT then transmits the resultant force and moment of liquid sloshing to ADSMS CAR, so as to realize the co-simulation of the rollover process of the tank truck by using ADAMS CAR, SIMULINK and FLUENT. The critical acceleration of tank truck rollover was calculated by step steer simulation, and the influence data of liquid sloashing were obtained. The research results can be applied to the safety warning and accident recovery of tank truck. In this paper, the accident recovery of the 'June 13' tank truck explosion accident in Wenling section of Shenyang-Haikou Expressway in 2020 is carried out. The calculated results are consistent with the facts, which proves that the results of the co-simulation method are reliable. © 2023 The Authors.

关键词： Simulink

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Quantitative Study of the Coupling Among Cardiovascular System, Lymphatic System and Interstitial Space

Quantitative Study of the Coupling Among Cardiovascular Syst...

引用

international conference on applied mathematics, modeling and Computational Science, ammcs 2019

作者： Marazzi, Nicholas Mattia Huxley, Virginia H. Sacco, Riccardo Guidoboni, Giovanna Department of Electrical Engineering and Computer Science University of Missouri 201 Naka Hall ColumbiaMO65211 United States Department of Medical Pharmacology and Physiology University of Missouri One Hospital Drive MA415 Medical Sciences Building ColumbiaMO65212 United States Department of Mathematics Politecnico di MIlano Piazza Leonardo da Vinci 32 Milano20133 Italy Department of Electrical Engineering and Computer Science Department of Mathematics University of Missouri 201 Naka Hall ColumbiaMO65211 United States

ISBN: (纸本)9783030635909

Tissue interstitial pressure plays a crucial role in maintaining fluid balance in the body. Despite solid experimental evidence of subatmospheric interstitial pressures, the mechanisms leading to the observed negative pressure values have yet to be elucidated fully. The present work addresses this issue theoretically by coupling, for the first time, the cardiovascular and lymphatic circulations within a single closed-loop model. Two model versions are compared, in which lymph formation results solely from a difference in hydrostatic pressure (Model 1), or is the result of the combined action of hydrostatic pressure differences and other mechanisms, such as oncotic pressure gradients and muscle motion (Model 2). simulations indicate that hydrostatic mechanisms fail to yield negative interstitial pressures, and that suction effects due to lymphatic pumping promote lymph formation without yielding negative interstitial pressures. © 2021, Springer Nature Switzerland AG.

关键词： Cardiovascular system

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Application analysis of fuzzy mathematics based on comprehensive evaluation in mathematical modeling 2021

Application analysis of fuzzy mathematics based on comprehen...

引用

4th international conference on Information Systems and computer Aided Education, ICISCAE 2021

作者： Xiong, Wei Jiangxi University of Engineering Xinyu Jiangxi338029 China

ISBN: (纸本)9781450390255

In modeling and simulation, due to the inherent fuzziness of people's preference judgment, it is very difficult for decision analysts to give the relative importance of each index with precise numbers, but it is easier for them to give the relative importance of each index in language. To solve practical problems, it is necessary to apply teaching knowledge to mathematically analyze things, establish mathematical models, and then use mathematical models to solve practical problems. The characteristics of mathematical models can be used in various fields. In this paper, based on comprehensive evaluation, fuzzy clustering analysis theory is applied to deal with some problems in mathematical modeling quickly and simply, and satisfactory results are obtained. © 2021 ACM.

关键词： modeling languages

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Measurement and modeling of Long Multi-Conductor Shielded Cable Based on Fast Vector Fitting Algorithm 2

Measurement and Modeling of Long Multi-Conductor Shielded Ca...

引用

2nd international conference on applied mathematics, modeling and computer simulation, ammcs 2022

作者： Zhang, Jinsheng Chen, Wei College of Electrical Engineering and Automation Fuzhou University Fuzhou China

ISBN: (纸本)9781643683522

The transmission lines need to be modeled accurately to predict the voltage reflections and EMI levels of the converter system. In this paper, a transmission line model based on fast vector fitting algorithm is proposed. At high frequencies, the parasitic capacitance of the cable conductor causes the cable impedance to resonate. Due to skin effect and proximity effect, the cable parameters change with frequency. The frequency equivalent model is used to characterize the effect of cable parameters varying with frequency. When cable is open-circuited and short-circuited, and the high-frequency impedance characteristics of the cable are measured using an impedance analyzer. Through the relationship between measured impedance and model impedance, the impedance of the model is obtained. The impedance is fitted by fast vector fitting algorithm. Finally, the feasibility and validity of the proposed model are verified by comparing the simulation and measurement results in the frequency and time domains. © 2022 The authors and IOS Press.

关键词： Cables

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BIM Models Enhancement Through simulation modeling 14

BIM Models Enhancement Through Simulation Modeling

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14th international conference Management of Large-Scale System Development, MLSD 2021

作者： Devyatkov, Timur Devyatkov, Vladimir Gabalin, Alexey Shuvalov, Konstantin LLC Elina-computer Kazan Russia Institute of Applied Research Tatarstan Academy of Sciences Kazan Russia V.A. Trapeznikov Institute of Control Sciences Russian Academy of Sciences Moscow Russia

ISBN: (纸本)9781665412308

The technique of combining BIM and simulation modeling is considered. The increasing role of BIM in building projects, along with the poor quality of the control aspect in BIM, is noticed. The enhancement of the BIM in the field of control modeling using different simulation models of logistics and evacuation is proposed. © 2021 IEEE.

关键词： Quality control

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Crop Disease Detection Method Based on Improved Yolov5 Algorithm 3

Crop Disease Detection Method Based on Improved Yolov5 Algor...

引用

3rd international conference on applied mathematics, modeling and computer simulation, ammcs 2023

作者： Bai, Mingyu Wang, Qingfang School of Mathematics and Computer Science Wuhan Polytechnic University Wuhan China

ISBN: (纸本)9781643684581

Corn, as a macronutrient-rich crop, has become one of the indispensable foods worldwide. But crop diseases have a great impact on corn yield, so timely treatment of crop diseases and pests can improve crop yield to a certain extent. In this paper, we propose an improved computer vision-based Yolov5s algorithm for maize leaf disease detection to achieve efficient corn leaf disease identification. We replace the feature pyramid network structure in the Yolov5s structure with a weighted feature pyramid network structure, using this weighted feature network can better fuse the features. That improves the efficiency of the extracted features and improves the detection accuracy of the model for small targets. At the same time, we optimize the loss function of the model, which makes the algorithm have some improvement in convergence speed and localization accuracy. We compare the dataset on different target detection algorithms for comparison experiments. The improved algorithm of this paper can improve the detection accuracy while retaining a faster detection speed, and it can detect more diseased targets in a shorter period. © 2023 The Authors.

关键词： Crops

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Research on the Key Technology Identification of Supply Chain Based on Entropy Weight and TOPSIS Method 3

Research on the Key Technology Identification of Supply Chai...

引用

3rd international conference on applied mathematics, modeling and computer simulation, ammcs 2023

作者： Zhang, Ke Chu, Jiayi Chen, Yi School of Management Wuhan University of Technology Hubei Wuhan430070 China School of Computer Science and Artificial Intelligence Wuhan University of Technology Hubei Wuhan430070 China School of International Education Wuhan University of Technology Hubei Wuhan430070 China

ISBN: (纸本)9781643684581

With the development of global economy and the intensification of market competition, identifying and applying appropriate key technologies has become the key for enterprises to achieve excellent performance in supply chain. This paper proposes an entropy weight and TOPSIS method for identifying key technologies in the supply chain. It addresses the issue of neglecting indicator weights in traditional evaluation methods and improves objectivity and accuracy. The method involves constructing an indicator system through literature research and expert questionnaires, calculating weights using entropy weight and TOPSIS, and evaluating and ranking technologies. © 2023 The Authors.

关键词： Supply chains

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Construction of a Three-Layer Directed Network Model with Multimodal Characteristics

Construction of a Three-Layer Directed Network Model with Mu...

引用

2021 international conference on applied mathematics, modeling and computer simulation, ammcs 2021

作者： Zhang, Na Xiao, Yuzhi Zhao, Haixing Tang, Cunyang Cui, Baoyang College of Computer Qinghai Normal University Xining China The State Key Laboratory of Tibetan Intelligent Information Processing and Application Qinghai Xining810008 China

ISBN: (纸本)9781643682549

The multi-layer directed network model focuses on portraying the directionality, diversity and difference of the edges in the network. It is also one of the powerful tools for analyzing the complexity of the network system and the heterogeneous interaction characteristics between network layers. This paper constructs three three-layer directed network models combined with traditional complex network theory and analyzes their degree distribution characteristics. By controlling the out-degree and in-degree of the middle-level nodes, a network structure with multi-peak characteristics is configured. Combined with numerical simulation, it is concluded that the number of links between the layers of the directed network makes the network characterize the characteristics of unimodal, bimodal, and trimodal;the combination of the optimal mechanism and the changes in the number of inter-layer links, the network characteristics show the coexistence of power law and unimodal. The research results of this paper have practical value for the analysis of network generation mechanism and correlation law by using multi-layer directed network theory in the era of big data. © 2022 The authors and IOS Press.

关键词： Network layers

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Optimal Hybrid Reinsurance Strategy Based on the Classic Model of Minimizing Ruin Risk 4

Optimal Hybrid Reinsurance Strategy Based on the Classic Mod...

引用

4th international conference on applied mathematics, modeling and computer simulation, ammcs 2024

作者： Liu, Zhang Zhu, Xu Shen, Sijia Chen, Ziyun School of Computer and Information Engineering Jiangxi Agricultural University Jiangxi Nanchang China

ISBN: (纸本)9781643685519

The optimization problem in reinsurance risk theory is one of the hot issues that has attracted wide attention in the academic and financial circles. In order to study the optimal reinsurance strategy that can minimize the risk of bankruptcy under the classical risk model, this paper establishes a hybrid reinsurance model of proportional reinsurance and excess loss reinsurance based on the variance premium principle, calculates the mathematical expectation and variance of the pure operating profit process, and establishes the Lagrange function using the mean-variance criterion, solves the equations that satisfy the optimal proportional coefficient and the optimal retention, and uses specific examples to illustrate the practical application of the hybrid reinsurance model. © 2024 The Authors.

关键词： Lagrange multipliers

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Large-Scale Simulated Storage Tank Settlement and Strain simulation 4

Large-Scale Simulated Storage Tank Settlement and Strain Sim...

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4th international conference on applied mathematics, modeling and computer simulation, ammcs 2024

作者： Zhao, Yongtao Yong, Ruisheng Cao, Jiaqi Wang, Jingzhi Sun, Jipei China National Petroleum Corporation Safety and Environmental Technology Research Institute Beijing China China University of Petroleum Beijing China

ISBN: (纸本)9781643685519

Under the action of hydraulic pressure, the storage tanks built on soft soil foundation are prone to produce various settlement and deformation. The stability of the tank is very sensitive to settlement deformation, and the uneven settlement around the tank is the most disadvantageous to the stability of the tank. In this paper, a 1:16 simulated tank (5m in diameter, 1.44m in height) was tested by fiber grating strain measurement with uneven settlement, and the results were compared with those of finite element analysis. The results show that the main stress on the tank wall is along the axis of the tank, and the maximum strain on the tank wall occurs during the settlement process, which highlights the importance of on-line dynamic monitoring. © 2024 The Authors.

关键词： Tanks (containers)

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