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Determination of 3D near fault seismic behaviour of Oroville earth fill dam using burger material model and free field-quiet boundary conditions 利用burger材料模型和自由场-静边界条件确定Oroville土坝近断层三维地震行为
IF 1.9 4区 数学
Mathematical and Computer Modelling of Dynamical Systems Pub Date : 2022-02-27 DOI: 10.1080/13873954.2022.2033274
M. Karalar, Murat Çavuşlu
{"title":"Determination of 3D near fault seismic behaviour of Oroville earth fill dam using burger material model and free field-quiet boundary conditions","authors":"M. Karalar, Murat Çavuşlu","doi":"10.1080/13873954.2022.2033274","DOIUrl":"https://doi.org/10.1080/13873954.2022.2033274","url":null,"abstract":"ABSTRACT In this study, the three-dimensional (3D) near-fault earthquake performance of the Oroville dam is examined considering a special material model and various seismic boundary conditions. The 3D finite-difference model of the Oroville EF dam is modeled using the finite difference method. Burger Creep (BC) material model is utilized for the foundation and dam body materials. Special interface elements are taken into account between the dam body and foundation. Fix, free field, and quiet seismic boundary conditions are considered for 3D nonlinear earthquake analyses. Total six various strong near-fault earthquakes are used in the 3D analyses. According to the non-linear earthquake analyses, principal stresses, horizontal and vertical displacements for three nodal points are assessed in detail and numerical results are compared for reflecting and non-reflecting seismic boundary conditions. It is clearly understood that seismic boundary conditions should not be utilized randomly for 3D modeling and analysis of EF dams.","PeriodicalId":49871,"journal":{"name":"Mathematical and Computer Modelling of Dynamical Systems","volume":"28 1","pages":"55 - 77"},"PeriodicalIF":1.9,"publicationDate":"2022-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43156709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
A port-Hamiltonian formulation of coupled heat transfer 耦合传热的端口哈密顿公式
IF 1.9 4区 数学
Mathematical and Computer Modelling of Dynamical Systems Pub Date : 2022-02-27 DOI: 10.1080/13873954.2022.2038637
Jens Jäschke, M. Ehrhardt, M. Günther, B. Jacob
{"title":"A port-Hamiltonian formulation of coupled heat transfer","authors":"Jens Jäschke, M. Ehrhardt, M. Günther, B. Jacob","doi":"10.1080/13873954.2022.2038637","DOIUrl":"https://doi.org/10.1080/13873954.2022.2038637","url":null,"abstract":"ABSTRACT Heat transfer and cooling solutions play an important role in the design of gas turbine blades. However, the underlying mathematical coupling structures have not been thoroughly investigated. In this work, the port-Hamiltonian formalism is applied to the conjugate heat transfer problem in gas turbine blades. A mathematical model based on common engineering simplifications is constructed and further simplified to reduce complexity and focus on the coupling structures of interest. The model is then cast as a port-Hamiltonian system and examined for stability and well posedness.","PeriodicalId":49871,"journal":{"name":"Mathematical and Computer Modelling of Dynamical Systems","volume":"28 1","pages":"78 - 94"},"PeriodicalIF":1.9,"publicationDate":"2022-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46778195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Modelling health impacts of hepatitis – model selection and treatment plans 肝炎对健康影响的建模——模型选择和治疗计划
IF 1.9 4区 数学
Mathematical and Computer Modelling of Dynamical Systems Pub Date : 2022-02-08 DOI: 10.1080/13873954.2021.2020296
C. Reisch
{"title":"Modelling health impacts of hepatitis – model selection and treatment plans","authors":"C. Reisch","doi":"10.1080/13873954.2021.2020296","DOIUrl":"https://doi.org/10.1080/13873954.2021.2020296","url":null,"abstract":"ABSTRACT Hepatitis B and C are viruses causing liver infections and resulting in grave secondary diseases. While there are different treatments for chronic liver infections, the process of evolving chronic diseases is still not fully understood. This paper presents an economic-inspired model for the overall health of an infected organism. The health model is based on the results of a reaction diffusion model for describing the space-dependent dynamics of virus and T cells during a liver infection. The different treatments affect the parameters of the reaction diffusion model and influence therefore the well-being of the infected person during an infection. The health model is selected in a detailed process out of a class of possible models. The presented work provides a foundation for an optimal control problem for finding the best treatment strategy.","PeriodicalId":49871,"journal":{"name":"Mathematical and Computer Modelling of Dynamical Systems","volume":"28 1","pages":"28 - 54"},"PeriodicalIF":1.9,"publicationDate":"2022-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49598632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Autonomous navigation of ships by combining optimal trajectory planning with informed graph search 最优轨迹规划与知情图搜索相结合的船舶自主导航
IF 1.9 4区 数学
Mathematical and Computer Modelling of Dynamical Systems Pub Date : 2022-02-03 DOI: 10.1080/13873954.2021.2007138
Luis Lüttgens, B. Jurgelucks, Heinrich Wernsing, S. Roy, C. Büskens, K. Flaßkamp
{"title":"Autonomous navigation of ships by combining optimal trajectory planning with informed graph search","authors":"Luis Lüttgens, B. Jurgelucks, Heinrich Wernsing, S. Roy, C. Büskens, K. Flaßkamp","doi":"10.1080/13873954.2021.2007138","DOIUrl":"https://doi.org/10.1080/13873954.2021.2007138","url":null,"abstract":"ABSTRACT Autonomous trajectory generation plays an essential role in the navigation of vehicles in space as well as in terrestrial scenarios, i.e. in the air, on solid ground, or water. For the latter, the navigation of ships in ports has specific challenges since ship dynamics are highly nonlinear with limited agility, while the manoeuvre space in ports is limited. Nevertheless, for providing support to humanly designed control strategies, autonomously generated trajectories have not only to be feasible, i.e. collision-free but shall also be optimal with respect to manoeuvre time and control effort. This article presents a novel approach to autonomous trajectory planning on the basis of precomputed and connectable trajectory segments, the so-called motion primitives, and an A*-search algorithm. Sequences of motion primitives provide an initial guess for a subsequent optimization by which optimal trajectories are found even in terrains with many obstacles. We illustrate the approach with different navigation scenarios.","PeriodicalId":49871,"journal":{"name":"Mathematical and Computer Modelling of Dynamical Systems","volume":"28 1","pages":"1 - 27"},"PeriodicalIF":1.9,"publicationDate":"2022-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43859391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Can we replicate real human behaviour using artificial neural networks? 我们能用人工神经网络复制真实的人类行为吗?
IF 1.9 4区 数学
Mathematical and Computer Modelling of Dynamical Systems Pub Date : 2021-07-09 DOI: 10.1080/13873954.2022.2039717
G. Jäger, D. Reisinger
{"title":"Can we replicate real human behaviour using artificial neural networks?","authors":"G. Jäger, D. Reisinger","doi":"10.1080/13873954.2022.2039717","DOIUrl":"https://doi.org/10.1080/13873954.2022.2039717","url":null,"abstract":"ABSTRACT Agent-based modelling is a powerful tool when simulating human systems, yet when human behaviour cannot be described by simple rules or maximizing one’s own profit, we quickly reach the limits of this methodology. Machine learning has the potential to bridge this gap by providing a link between what people observe and how they act in order to reach their goal. In this paper we use a framework for agent-based modelling that utilizes human values like fairness, conformity and altruism. Using this framework we simulate a public goods game and compare to experimental results. We can report good agreement between simulation and experiment and furthermore find that the presented framework outperforms strict reinforcement learning. Both the framework and the utility function are generic enough that they can be used for arbitrary systems, which makes this method a promising candidate for a foundation of a universal agent-based model.","PeriodicalId":49871,"journal":{"name":"Mathematical and Computer Modelling of Dynamical Systems","volume":"28 1","pages":"95 - 109"},"PeriodicalIF":1.9,"publicationDate":"2021-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44931511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Mathematical Modelling of Non-Linear Transient Long Waves by using Finite Element Method in an Irregular Shaped Harbour 不规则港口非线性瞬态长波的有限元数学建模
IF 1.9 4区 数学
Mathematical and Computer Modelling of Dynamical Systems Pub Date : 2021-01-02 DOI: 10.1080/13873954.2021.1973510
Sukhwinder Kaur, P. Kumar, Rajni
{"title":"Mathematical Modelling of Non-Linear Transient Long Waves by using Finite Element Method in an Irregular Shaped Harbour","authors":"Sukhwinder Kaur, P. Kumar, Rajni","doi":"10.1080/13873954.2021.1973510","DOIUrl":"https://doi.org/10.1080/13873954.2021.1973510","url":null,"abstract":"ABSTRACT Extreme waves significantly affect the coastal structures, activities, and population. Therefore, investigation of extreme wave impact on coastal regions is essential. In this study, a mathematical model is presented to analyse the impact of transient long waves on coastal structures. The mathematical model is constructed based on the Boussinesq equation (BE) with variable water depth including dispersion properties. The numerical solution of BE is constructed by using FEM. The present numerical model is validated through the existing study of Lepelletier (1981) and convergence analysis is also conducted to determine the convergence rate. The present FEM model is implemented on realistic Paradip port, Odisha, India to determine the wave amplitude at various record stations. In addition, the impact of incident waves with angular variation is analysed in the Paradip port. The causes and countermeasures have been proposed based on the simulation results to improve the resonance in the port.","PeriodicalId":49871,"journal":{"name":"Mathematical and Computer Modelling of Dynamical Systems","volume":"27 1","pages":"411 - 428"},"PeriodicalIF":1.9,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46862277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Approximating the solution of the discharging process in a domestic hot water storage tank 生活热水储罐排放过程的近似求解
IF 1.9 4区 数学
Mathematical and Computer Modelling of Dynamical Systems Pub Date : 2021-01-02 DOI: 10.1080/13873954.2021.1887277
F. Müller
{"title":"Approximating the solution of the discharging process in a domestic hot water storage tank","authors":"F. Müller","doi":"10.1080/13873954.2021.1887277","DOIUrl":"https://doi.org/10.1080/13873954.2021.1887277","url":null,"abstract":"ABSTRACT In this article a new approximation procedure for the temperature during the discharging process in a domestic hot water storage tank is developed. The main idea of this procedure is the mathematical description of the dynamic behaviour of a boundary layer that appears inside the storage tank. This leads to an approximate solution of a simple structure but a high accuracy throughout the whole discharging process for the temperature distribution inside the storage tank. For validation the approximate solution is compared with the exact solution that is constructed with help of generalized Fourier coefficients and a numerical solution that is obtained by a semi-discretization method. Adapting the method leads also to an approximation procedure for charging processes.","PeriodicalId":49871,"journal":{"name":"Mathematical and Computer Modelling of Dynamical Systems","volume":"27 1","pages":"141 - 161"},"PeriodicalIF":1.9,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13873954.2021.1887277","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47148548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Crop prediction based on soil and environmental characteristics using feature selection techniques 利用特征选择技术进行基于土壤和环境特征的作物预测
IF 1.9 4区 数学
Mathematical and Computer Modelling of Dynamical Systems Pub Date : 2021-01-02 DOI: 10.1080/13873954.2021.1882505
A. Suruliandi, G. Mariammal, S. Raja
{"title":"Crop prediction based on soil and environmental characteristics using feature selection techniques","authors":"A. Suruliandi, G. Mariammal, S. Raja","doi":"10.1080/13873954.2021.1882505","DOIUrl":"https://doi.org/10.1080/13873954.2021.1882505","url":null,"abstract":"ABSTRACT Earlier, crop cultivation was undertaken on the basis of farmers’ hands-on expertise. However, climate change has begun to affect crop yields badly. Consequently, farmers are unable to choose the right crop/s based on soil and environmental factors, and the process of manually predicting the choice of the right crop/s of land has, more often than not, resulted in failure. Accurate crop prediction results in increased crop production. This is where machine learning playing a crucial role in the area of crop prediction. Crop prediction depends on the soil, geographic and climatic attributes. Selecting appropriate attributes for the right crop/s is an intrinsic part of the prediction undertaken by feature selection techniques. In this work, a comparative study of various wrapper feature selection methods are carried out for crop prediction using classification techniques that suggest the suitable crop/s for land. The experimental results show the Recursive Feature Elimination technique with the Adaptive Bagging classifier outperforms the others.","PeriodicalId":49871,"journal":{"name":"Mathematical and Computer Modelling of Dynamical Systems","volume":"27 1","pages":"117 - 140"},"PeriodicalIF":1.9,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13873954.2021.1882505","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42288312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 42
Analysing of Tuberculosis in Turkey through SIR, SEIR and BSEIR Mathematical Models 通过SIR、SEIR和BSEIR数学模型分析土耳其结核病
IF 1.9 4区 数学
Mathematical and Computer Modelling of Dynamical Systems Pub Date : 2021-01-02 DOI: 10.1080/13873954.2021.1881560
Yasin Ucakan, S. Gulen, K. Koklu
{"title":"Analysing of Tuberculosis in Turkey through SIR, SEIR and BSEIR Mathematical Models","authors":"Yasin Ucakan, S. Gulen, K. Koklu","doi":"10.1080/13873954.2021.1881560","DOIUrl":"https://doi.org/10.1080/13873954.2021.1881560","url":null,"abstract":"ABSTRACT Since mathematical models play a key role in investigating the dynamics of infectious diseases, many mathematical models for these diseases are developed. In this paper, it is aimed to determine the dynamics of Tuberculosis (TB) in Turkey, how much it will affect the future and the impact of vaccine therapy on the disease. For this purpose, three mathematical models (SIR, SEIR and BSEIR) in the literature are considered for the case of Turkey. The model parameters are obtained with TB reported data from 2005 to 2015 by using the least square method. The obtained results revealed that the basic reproduction ratio for all three models is less than 1. Moreover, the stability analysis of the models and sensitivity analysis of the model parameters are presented and discussed. Finally, the accuracy of results for all three models is compared and the effect of the vaccination rate is discussed.","PeriodicalId":49871,"journal":{"name":"Mathematical and Computer Modelling of Dynamical Systems","volume":"27 1","pages":"179 - 202"},"PeriodicalIF":1.9,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13873954.2021.1881560","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42022526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Dynamics of cough and particulate behaviour in the human airway 人类气道中咳嗽和颗粒物行为的动力学
IF 1.9 4区 数学
Mathematical and Computer Modelling of Dynamical Systems Pub Date : 2021-01-02 DOI: 10.1080/13873954.2021.1889608
O. Ilegbusi, D. Kuruppumullage, Bari Hoffman
{"title":"Dynamics of cough and particulate behaviour in the human airway","authors":"O. Ilegbusi, D. Kuruppumullage, Bari Hoffman","doi":"10.1080/13873954.2021.1889608","DOIUrl":"https://doi.org/10.1080/13873954.2021.1889608","url":null,"abstract":"ABSTRACT Computational Fluid Dynamics is used to model airflow and penetrant behaviour under cough reflex in human airway. The airway geometry segment from the oral cavity to the primary bronchi is reconstructed from CT scan images of a human subject in the standing posture. The inlet flow condition is derived from dynamic cough profiles obtained from two subjects. The mathematical model allows the laryngopharyngeal wall of the airway to remodel. A k-ω turbulence model is used to represent the transitional flow. A Lagrangian approach is used to track solid penetrants in the flow field as a function of penetrant size and density. High velocities are predicted at peak expiratory cough phase. The penetrant size significantly influences the particle residence time and drag force is largely responsible for changes in the penetrant momentum. The smaller penetrants act like tracers in the flow and can escape the airway faster than larger penetrants.","PeriodicalId":49871,"journal":{"name":"Mathematical and Computer Modelling of Dynamical Systems","volume":"27 1","pages":"222 - 245"},"PeriodicalIF":1.9,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13873954.2021.1889608","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45358416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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