首页 > 最新文献

Journal of Mathematics in Industry最新文献

英文 中文
An epidemic model integrating direct and fomite transmission as well as household structure applied to COVID-19. 将直接传播、蚁群传播和家庭结构相结合的流行病模型应用于 COVID-19。
IF 1.2 Q3 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2021-01-01 Epub Date: 2021-01-05 DOI: 10.1186/s13362-020-00097-x
Karunia Putra Wijaya, Naleen Ganegoda, Yashika Jayathunga, Thomas Götz, Moritz Schäfer, Peter Heidrich

This paper stresses its base contribution on a new SIR-type model including direct and fomite transmission as well as the effect of distinct household structures. The model derivation is modulated by several mechanistic processes inherent from typical airborne diseases. The notion of minimum contact radius is included in the direct transmission, facilitating the arguments on physical distancing. As fomite transmission heavily relates to former-trace of sneezes, the vector field of the system naturally contains an integral kernel with time delay indicating the contribution of undetected and non-quarantined asymptomatic cases in accumulating the historical contamination of surfaces. We then increase the complexity by including the different transmission routines within and between households. For airborne diseases, within-household interactions play a significant role in the propagation of the disease rendering countrywide effect. Two steps were taken to include the effect of household structure. The first step subdivides the entire compartments (susceptible, exposed, asymptomatic, symptomatic, recovered, death) into the household level and different infection rates for the direct transmission within and between households were distinguished. Under predefined conditions and assumptions, the governing system on household level can be raised to the community level. The second step then raises the governing system to the country level, where the final state variables estimate the total individuals from all compartments in the country. Two key attributes related to the household structure (number of local households and number of household members) effectively classify countries to be of low or high risk in terms of effective disease propagation. The basic reproductive number is calculated and its biological meaning is invoked properly. The numerical methods for solving the DIDE-system and the parameter estimation problem were mentioned. Our optimal model solutions are in quite good agreement with datasets of COVID-19 active cases and related deaths from Germany and Sri Lanka in early infection, allowing us to hypothesize several unobservable situations in the two countries. Focusing on extending minimum contact radius and reducing the intensity of individual activities, we were able to synthesize the key parameters telling what to practice.

本文强调其基础贡献在于一个新的 SIR 型模型,包括直接传播和飞沫传播以及不同家庭结构的影响。该模型的推导受到典型空气传播疾病固有的几个机理过程的影响。在直接传播中包含了最小接触半径的概念,便于对物理距离进行论证。由于熏蒸传播在很大程度上与前喷嚏痕迹有关,系统的矢量场自然包含一个具有时间延迟的积分核,表明未被发现和未检疫的无症状病例在累积历史表面污染中的贡献。然后,我们将住户内部和住户之间的不同传播程序纳入其中,从而增加了复杂性。对于空气传播疾病,住户内部的相互作用在疾病传播过程中发挥着重要作用,从而在全国范围内产生影响。为了纳入家庭结构的影响,我们采取了两个步骤。第一步是将整个分区(易感者、暴露者、无症状者、有症状者、康复者、死亡者)细分到家庭层面,并区分家庭内部和家庭之间直接传播的不同感染率。在预先设定的条件和假设下,可以将家庭层面的治理系统提升到社区层面。第二步是将治理系统提升到国家层面,在国家层面,最终状态变量估算的是全国所有分区的总人数。与家庭结构相关的两个关键属性(当地家庭数量和家庭成员数量)可以有效地将国家划分为疾病有效传播的低风险国家或高风险国家。计算基本繁殖数,并正确引用其生物学含义。还提到了解决 DIDE 系统和参数估计问题的数值方法。我们的最优模型解决方案与德国和斯里兰卡的 COVID-19 活动病例和相关死亡数据集在早期感染时非常吻合,使我们能够假设这两个国家的几种无法观察到的情况。我们将重点放在扩大最小接触半径和降低个人活动强度上,从而综合出了一些关键参数,告诉我们该如何实践。
{"title":"An epidemic model integrating direct and fomite transmission as well as household structure applied to COVID-19.","authors":"Karunia Putra Wijaya, Naleen Ganegoda, Yashika Jayathunga, Thomas Götz, Moritz Schäfer, Peter Heidrich","doi":"10.1186/s13362-020-00097-x","DOIUrl":"10.1186/s13362-020-00097-x","url":null,"abstract":"<p><p>This paper stresses its base contribution on a new SIR-type model including direct and fomite transmission as well as the effect of distinct household structures. The model derivation is modulated by several mechanistic processes inherent from typical airborne diseases. The notion of minimum contact radius is included in the direct transmission, facilitating the arguments on physical distancing. As fomite transmission heavily relates to former-trace of sneezes, the vector field of the system naturally contains an integral kernel with time delay indicating the contribution of undetected and non-quarantined asymptomatic cases in accumulating the historical contamination of surfaces. We then increase the complexity by including the different transmission routines within and between households. For airborne diseases, within-household interactions play a significant role in the propagation of the disease rendering countrywide effect. Two steps were taken to include the effect of household structure. The first step subdivides the entire compartments (susceptible, exposed, asymptomatic, symptomatic, recovered, death) into the household level and different infection rates for the direct transmission within and between households were distinguished. Under predefined conditions and assumptions, the governing system on household level can be raised to the community level. The second step then raises the governing system to the country level, where the final state variables estimate the total individuals from all compartments in the country. Two key attributes related to the household structure (number of local households and number of household members) effectively classify countries to be of low or high risk in terms of effective disease propagation. The basic reproductive number is calculated and its biological meaning is invoked properly. The numerical methods for solving the DIDE-system and the parameter estimation problem were mentioned. Our optimal model solutions are in quite good agreement with datasets of COVID-19 active cases and related deaths from Germany and Sri Lanka in early infection, allowing us to hypothesize several unobservable situations in the two countries. Focusing on extending minimum contact radius and reducing the intensity of individual activities, we were able to synthesize the key parameters telling what to practice.</p>","PeriodicalId":44012,"journal":{"name":"Journal of Mathematics in Industry","volume":"11 1","pages":"1"},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7784626/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38804221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on aircraft route planning optimization problem with multi-constraints and dual-targets 多约束双目标飞机航路规划优化问题研究
IF 2.6 Q3 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2020-10-28 DOI: 10.1186/s13362-020-00094-0
Qianyu Zhang, Xianfeng Ding, Jingyu Zhou, Yi Nie
As the core technology in the field of aircraft, the route planning has attracted much attention. However, due to the complexity of the structure and performance constraints of the aircraft, the route planning algorithm does not have well universality, so it cannot be used in a complex environment. In the paper, a multi-constraints and dual-targets aircraft route planning model was established for the real-time requirements of space flight, the dynamic changes of flight environment with time, the accuracy requirements of positioning errors in the safety area, and the minimum turning radius constraints. Based on the directed graph and dynamic programming ideas, the model simulation and model validation were carried out with the data of F question in the “16th Graduate Mathematical Modeling Contest”. The results showed that the optimal path length obtained in data set 1 was 124.61 km, the number of corrections was 11 times, the solution time was 2.3768 seconds, the optimal path length obtained in data set 2 was 110.00 km, and the number of corrections was 12 times. The solution time was 0.0168 seconds. Multi-constraints and dual-targets aircraft route planning model can plan the flight path of the aircraft intuitively and timely, which confirmed the effectiveness of the model.
航线规划作为飞机领域的核心技术,一直备受关注。然而,由于飞机结构的复杂性和性能约束,航线规划算法不具有很好的通用性,因此不能在复杂的环境中使用。针对航天飞行的实时性要求、飞行环境随时间的动态变化、安全区域定位误差精度要求和最小转弯半径约束,建立了多约束双目标飞行器航路规划模型。基于有向图和动态规划思想,以“第十六届研究生数学建模大赛”F题数据进行模型仿真和模型验证。结果表明:数据集1获得的最优路径长度为124.61 km,修正次数为11次,求解时间为2.3768秒;数据集2获得的最优路径长度为110.00 km,修正次数为12次。溶液时间为0.0168秒。多约束双目标飞机航路规划模型能够直观、及时地规划飞机的飞行路径,验证了模型的有效性。
{"title":"Research on aircraft route planning optimization problem with multi-constraints and dual-targets","authors":"Qianyu Zhang, Xianfeng Ding, Jingyu Zhou, Yi Nie","doi":"10.1186/s13362-020-00094-0","DOIUrl":"https://doi.org/10.1186/s13362-020-00094-0","url":null,"abstract":"As the core technology in the field of aircraft, the route planning has attracted much attention. However, due to the complexity of the structure and performance constraints of the aircraft, the route planning algorithm does not have well universality, so it cannot be used in a complex environment. In the paper, a multi-constraints and dual-targets aircraft route planning model was established for the real-time requirements of space flight, the dynamic changes of flight environment with time, the accuracy requirements of positioning errors in the safety area, and the minimum turning radius constraints. Based on the directed graph and dynamic programming ideas, the model simulation and model validation were carried out with the data of F question in the “16th Graduate Mathematical Modeling Contest”. The results showed that the optimal path length obtained in data set 1 was 124.61 km, the number of corrections was 11 times, the solution time was 2.3768 seconds, the optimal path length obtained in data set 2 was 110.00 km, and the number of corrections was 12 times. The solution time was 0.0168 seconds. Multi-constraints and dual-targets aircraft route planning model can plan the flight path of the aircraft intuitively and timely, which confirmed the effectiveness of the model.","PeriodicalId":44012,"journal":{"name":"Journal of Mathematics in Industry","volume":"3 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2020-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138512859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A blackbox yield estimation workflow with Gaussian process regression applied to the design of electromagnetic devices 基于高斯过程回归的黑盒良率估计工作流应用于电磁器件设计
IF 2.6 Q3 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2020-10-07 DOI: 10.1186/s13362-020-00093-1
Mona Fuhrländer, S. Schöps
{"title":"A blackbox yield estimation workflow with Gaussian process regression applied to the design of electromagnetic devices","authors":"Mona Fuhrländer, S. Schöps","doi":"10.1186/s13362-020-00093-1","DOIUrl":"https://doi.org/10.1186/s13362-020-00093-1","url":null,"abstract":"","PeriodicalId":44012,"journal":{"name":"Journal of Mathematics in Industry","volume":"10 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2020-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s13362-020-00093-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"65846283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Data-driven graph drawing techniques with applications for conveyor systems 数据驱动的图形绘制技术及其在输送系统中的应用
IF 2.6 Q3 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2020-10-02 DOI: 10.1186/s13362-020-00092-2
Simone Göttlich, S. Spieckermann, Stephan Stauber, Andrea Storck
{"title":"Data-driven graph drawing techniques with applications for conveyor systems","authors":"Simone Göttlich, S. Spieckermann, Stephan Stauber, Andrea Storck","doi":"10.1186/s13362-020-00092-2","DOIUrl":"https://doi.org/10.1186/s13362-020-00092-2","url":null,"abstract":"","PeriodicalId":44012,"journal":{"name":"Journal of Mathematics in Industry","volume":"273 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2020-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s13362-020-00092-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"65846238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on track planning problem of multi-constrained and double-targeted 多约束双目标轨道规划问题研究
IF 2.6 Q3 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2020-07-22 DOI: 10.1186/s13362-020-00089-x
Yi Nie, Xiangjun Xie, Xianfeng Ding, Qianyu Zhang, Jingyu Zhou
Aiming at the positioning error of the aircraft, the error accumulation to a certain extent may lead to the failure of the mission. A track correction method based on oriented graph search was proposed, and the dynamic programming idea was applied to solve the path optimization problem. Firstly, the correction points in the flight space were preprocessed, and the planning of the correction points in the flight space was transformed into a graph theory problem. It effectively solves the problem that traditional methods did not adapt well to dynamic changes in flight space. And the problem of too high complexity in the calculation space. Using the dynamic programming idea to carry out the flight path planning for the flight space, the path-correction number optimal double-objective model is comprehensively established. Finally, the oriented graph and dynamic programming ideas were used to solve the problem, and the visual analysis of the aircraft track was realized. The simulation results show that the established path-corrected optimal double-objective model can calculate an optimal track with relatively small correction times and short length.
针对飞机的定位误差,误差累积到一定程度可能导致任务失败。提出了一种基于面向图搜索的航迹校正方法,并将动态规划思想应用于航迹优化问题的求解。首先对飞行空间中的校正点进行预处理,将飞行空间中校正点的规划问题转化为图论问题;有效地解决了传统方法不能很好地适应飞行空间动态变化的问题。以及计算空间复杂度过高的问题。利用动态规划思想对飞行空间进行航迹规划,全面建立航迹修正数最优双目标模型。最后,利用面向图和动态规划思想对问题进行了求解,实现了飞机航迹的可视化分析。仿真结果表明,所建立的路径修正最优双目标模型能够以较小的修正次数和较短的轨迹长度计算出最优轨迹。
{"title":"Study on track planning problem of multi-constrained and double-targeted","authors":"Yi Nie, Xiangjun Xie, Xianfeng Ding, Qianyu Zhang, Jingyu Zhou","doi":"10.1186/s13362-020-00089-x","DOIUrl":"https://doi.org/10.1186/s13362-020-00089-x","url":null,"abstract":"Aiming at the positioning error of the aircraft, the error accumulation to a certain extent may lead to the failure of the mission. A track correction method based on oriented graph search was proposed, and the dynamic programming idea was applied to solve the path optimization problem. Firstly, the correction points in the flight space were preprocessed, and the planning of the correction points in the flight space was transformed into a graph theory problem. It effectively solves the problem that traditional methods did not adapt well to dynamic changes in flight space. And the problem of too high complexity in the calculation space. Using the dynamic programming idea to carry out the flight path planning for the flight space, the path-correction number optimal double-objective model is comprehensively established. Finally, the oriented graph and dynamic programming ideas were used to solve the problem, and the visual analysis of the aircraft track was realized. The simulation results show that the established path-corrected optimal double-objective model can calculate an optimal track with relatively small correction times and short length.","PeriodicalId":44012,"journal":{"name":"Journal of Mathematics in Industry","volume":"3 2-3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2020-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138512860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Network-inspired versus Kozeny–Carman based permeability-porosity relations applied to Biot’s poroelasticity model 网络启发与基于Kozeny-Carman的渗透率-孔隙度关系应用于Biot的孔隙弹性模型
IF 2.6 Q3 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2020-07-06 DOI: 10.1186/s13362-020-00087-z
Menel Rahrah, Luis A. Lopez-Peña, Fred Vermolen, Bernard Meulenbroek
Water injection in the aquifer induces deformations in the soil. These mechanical deformations give rise to a change in porosity and permeability, which results in non-linearity of the mathematical problem. Assuming that the deformations are very small, the model provided by Biot’s theory of linear poroelasticity is used to determine the local displacement of the skeleton of a porous medium, as well as the fluid flow through the pores. In this continuum scale model, the Kozeny–Carman equation is commonly used to determine the permeability of the porous medium from the porosity. The Kozeny–Carman relation states that flow through the pores is possible at a certain location as long as the porosity is larger than zero at this location in the aquifer. However, from network models it is known that percolation thresholds exist, indicating that the permeability will be equal to zero if the porosity becomes smaller than these thresholds. In this paper, the relationship between permeability and porosity is investigated. A new permeability-porosity relation, based on the percolation theory, is derived and compared with the Kozeny–Carman relation. The strongest feature of the new approach is related to its capability to give a good description of the permeability in case of low porosities. However, with this network-inspired approach small values of the permeability are more likely to occur. Since we show that the solution of Biot’s model converges to the solution of a saddle point problem for small time steps and low permeability, we need stabilisation in the finite element approximation.
含水层注水引起土壤变形。这些机械变形引起孔隙度和渗透率的变化,从而导致数学问题的非线性。假设变形非常小,利用Biot的线性孔隙弹性理论提供的模型来确定多孔介质骨架的局部位移,以及流体在孔隙中的流动。在这种连续尺度模型中,通常使用Kozeny-Carman方程从孔隙度来确定多孔介质的渗透率。Kozeny-Carman关系表明,在含水层的某一位置,只要孔隙度大于零,流体就有可能通过孔隙。然而,从网络模型可知,渗透阈值是存在的,表明当孔隙度小于这些阈值时,渗透率将等于零。本文研究了渗透率与孔隙度的关系。基于渗流理论,推导了一种新的渗透率-孔隙度关系,并与Kozeny-Carman关系进行了比较。新方法的最大特点在于它能够很好地描述低孔隙度情况下的渗透率。然而,采用这种受网络启发的方法,更有可能出现较小的渗透率值。由于我们证明了Biot模型的解收敛于小时间步长和低渗透率的鞍点问题的解,因此我们需要在有限元近似中进行稳定。
{"title":"Network-inspired versus Kozeny–Carman based permeability-porosity relations applied to Biot’s poroelasticity model","authors":"Menel Rahrah, Luis A. Lopez-Peña, Fred Vermolen, Bernard Meulenbroek","doi":"10.1186/s13362-020-00087-z","DOIUrl":"https://doi.org/10.1186/s13362-020-00087-z","url":null,"abstract":"Water injection in the aquifer induces deformations in the soil. These mechanical deformations give rise to a change in porosity and permeability, which results in non-linearity of the mathematical problem. Assuming that the deformations are very small, the model provided by Biot’s theory of linear poroelasticity is used to determine the local displacement of the skeleton of a porous medium, as well as the fluid flow through the pores. In this continuum scale model, the Kozeny–Carman equation is commonly used to determine the permeability of the porous medium from the porosity. The Kozeny–Carman relation states that flow through the pores is possible at a certain location as long as the porosity is larger than zero at this location in the aquifer. However, from network models it is known that percolation thresholds exist, indicating that the permeability will be equal to zero if the porosity becomes smaller than these thresholds. In this paper, the relationship between permeability and porosity is investigated. A new permeability-porosity relation, based on the percolation theory, is derived and compared with the Kozeny–Carman relation. The strongest feature of the new approach is related to its capability to give a good description of the permeability in case of low porosities. However, with this network-inspired approach small values of the permeability are more likely to occur. Since we show that the solution of Biot’s model converges to the solution of a saddle point problem for small time steps and low permeability, we need stabilisation in the finite element approximation.","PeriodicalId":44012,"journal":{"name":"Journal of Mathematics in Industry","volume":"9 6-7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2020-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138512894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Modelling and simulation of flame cutting for steel plates with solid phases and melting 固相熔化钢板火焰切割的建模与仿真
IF 2.6 Q3 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2020-06-24 DOI: 10.1186/s13362-020-00086-0
Manuel J. Arenas, Dietmar Hömberg, Robert Lasarzik, Pertti Mikkonen, Thomas Petzold
The goal of this work is to describe in detail a quasi-stationary state model which can be used to deeply understand the distribution of the heat in a steel plate and the changes in the solid phases of the steel and into liquid phase during the flame cutting process. We use a 3D-model similar to previous works from Thiébaud (J. Mater. Process. Technol. 214(2):304–310, 2014) and expand it to consider phases changes, in particular, austenite formation and melting of material. Experimental data is used to validate the model and study its capabilities. Parameters defining the shape of the volumetric heat source and the power density are calibrated to achieve good agreement with temperature measurements. Similarities and differences with other models from literature are discussed.
本文的目标是详细描述一个准稳态模型,该模型可用于深入理解火焰切割过程中钢板的热量分布以及钢的固相和液相的变化。我们使用的3d模型类似于thi波特(J. Mater)之前的作品。的过程。技术,214(2):304-310,2014),并将其扩展到考虑相变化,特别是材料的奥氏体形成和熔化。利用实验数据对模型进行了验证,并对其性能进行了研究。定义体积热源形状和功率密度的参数经过校准,以达到与温度测量的良好一致。讨论了与文献中其他模型的异同。
{"title":"Modelling and simulation of flame cutting for steel plates with solid phases and melting","authors":"Manuel J. Arenas, Dietmar Hömberg, Robert Lasarzik, Pertti Mikkonen, Thomas Petzold","doi":"10.1186/s13362-020-00086-0","DOIUrl":"https://doi.org/10.1186/s13362-020-00086-0","url":null,"abstract":"The goal of this work is to describe in detail a quasi-stationary state model which can be used to deeply understand the distribution of the heat in a steel plate and the changes in the solid phases of the steel and into liquid phase during the flame cutting process. We use a 3D-model similar to previous works from Thiébaud (J. Mater. Process. Technol. 214(2):304–310, 2014) and expand it to consider phases changes, in particular, austenite formation and melting of material. Experimental data is used to validate the model and study its capabilities. Parameters defining the shape of the volumetric heat source and the power density are calibrated to achieve good agreement with temperature measurements. Similarities and differences with other models from literature are discussed.","PeriodicalId":44012,"journal":{"name":"Journal of Mathematics in Industry","volume":"6 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2020-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138512875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Mathematical modeling of vaporization during laser-induced thermotherapy in liver tissue 肝组织激光热疗过程中汽化的数学建模
IF 2.6 Q3 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2020-06-03 DOI: 10.1186/s13362-020-00082-4
Sebastian Blauth, Frank Hübner, Christian Leithäuser, Norbert Siedow, Thomas J. Vogl
Laser-induced thermotherapy (LITT) is a minimally invasive method causing tumor destruction due to heat ablation and coagulative effects. Computer simulations can play an important role to assist physicians with the planning and monitoring of the treatment. Our recent study with ex-vivo porcine livers has shown that the vaporization of the water in the tissue must be taken into account when modeling LITT. We extend the model used for simulating LITT to account for vaporization using two different approaches. Results obtained with these new models are then compared with the measurements from the original study.
激光热疗(Laser-induced thermal therapy, LITT)是一种利用热消融和凝固作用破坏肿瘤的微创治疗方法。计算机模拟可以发挥重要作用,协助医生与计划和监测治疗。我们最近对离体猪肝的研究表明,在建立LITT模型时必须考虑组织中水的蒸发。我们扩展了用于模拟LITT的模型,以使用两种不同的方法来考虑汽化。然后将这些新模型得到的结果与原始研究的测量结果进行比较。
{"title":"Mathematical modeling of vaporization during laser-induced thermotherapy in liver tissue","authors":"Sebastian Blauth, Frank Hübner, Christian Leithäuser, Norbert Siedow, Thomas J. Vogl","doi":"10.1186/s13362-020-00082-4","DOIUrl":"https://doi.org/10.1186/s13362-020-00082-4","url":null,"abstract":"Laser-induced thermotherapy (LITT) is a minimally invasive method causing tumor destruction due to heat ablation and coagulative effects. Computer simulations can play an important role to assist physicians with the planning and monitoring of the treatment. Our recent study with ex-vivo porcine livers has shown that the vaporization of the water in the tissue must be taken into account when modeling LITT. We extend the model used for simulating LITT to account for vaporization using two different approaches. Results obtained with these new models are then compared with the measurements from the original study.","PeriodicalId":44012,"journal":{"name":"Journal of Mathematics in Industry","volume":"11 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2020-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138512879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
On the formation of centreline shrinkage porosity in the continuous casting of steel 钢连铸中线缩孔的形成
IF 2.6 Q3 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2020-05-24 DOI: 10.1186/s13362-020-00084-2
Michael Vynnycky
A recent asymptotic model for solidification shrinkage-induced macrosegregation in the continuous casting of binary alloys is extended for the purposes of understanding the link between solute segregation and centreline shrinkage porosity, a defect that commonly occurs in the continuous casting of steel. In particular, the analysis elucidates the relationship between microsegregation, mushy-zone permeability, heat transfer and centreline pressure, yielding an inequality that constitutes a criterion for whether or not centreline porosity will form. The possibilities for developing this approach to take account of gas porosity and the implementation of mechanical soft reduction to reduce macrosegregation and shrinkage porosity are also discussed.
为了更好地理解溶质偏析和中线缩孔之间的联系(中线缩孔是连铸中常出现的一种缺陷),对二元合金连铸过程中凝固收缩引起的宏观偏析的渐近模型进行了扩展。特别地,该分析阐明了微偏析、泥质层渗透率、热传递和中线压力之间的关系,得出了一个不均匀性,该不均匀性构成了中线是否会形成孔隙的标准。本文还讨论了发展这种方法的可能性,以考虑气体孔隙度和实施机械软还原来减少宏观偏析和收缩孔隙度。
{"title":"On the formation of centreline shrinkage porosity in the continuous casting of steel","authors":"Michael Vynnycky","doi":"10.1186/s13362-020-00084-2","DOIUrl":"https://doi.org/10.1186/s13362-020-00084-2","url":null,"abstract":"A recent asymptotic model for solidification shrinkage-induced macrosegregation in the continuous casting of binary alloys is extended for the purposes of understanding the link between solute segregation and centreline shrinkage porosity, a defect that commonly occurs in the continuous casting of steel. In particular, the analysis elucidates the relationship between microsegregation, mushy-zone permeability, heat transfer and centreline pressure, yielding an inequality that constitutes a criterion for whether or not centreline porosity will form. The possibilities for developing this approach to take account of gas porosity and the implementation of mechanical soft reduction to reduce macrosegregation and shrinkage porosity are also discussed.","PeriodicalId":44012,"journal":{"name":"Journal of Mathematics in Industry","volume":"8 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2020-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138512874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Space mapping-based receding horizon control for stochastic interacting particle systems: dogs herding sheep 基于空间映射的随机相互作用粒子系统的后退视界控制:狗放牧羊
IF 2.6 Q3 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Pub Date : 2020-04-10 DOI: 10.1186/s13362-020-00077-1
C. Totzeck, R. Pinnau
{"title":"Space mapping-based receding horizon control for stochastic interacting particle systems: dogs herding sheep","authors":"C. Totzeck, R. Pinnau","doi":"10.1186/s13362-020-00077-1","DOIUrl":"https://doi.org/10.1186/s13362-020-00077-1","url":null,"abstract":"","PeriodicalId":44012,"journal":{"name":"Journal of Mathematics in Industry","volume":"10 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2020-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"65846090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
期刊
Journal of Mathematics in Industry
全部 Environ. Mol. Mutagen. Geobiology ECOTOXICOLOGY Big Earth Data Engineering Science and Technology, an International Journal Adv. Atmos. Sci. ERN: Other Macroeconomics: Aggregative Models (Topic) ERN: Stock Market Risk (Topic) Geosci. J. BIOGEOSCIENCES Astrophys. Space Sci. Enzyme Research Acta Oceanolog. Sin. Geostand. Geoanal. Res. Int. J. Earth Sci. 环境与发展 2011 IEEE 2nd International Conference on Computing, Control and Industrial Engineering ECOSYSTEMS ERN: Other IO: Empirical Studies of Firms & Markets (Topic) ECOL RESTOR Nat. Hazards Earth Syst. Sci. Energy Environ. Memai Heiko Igaku Espacio Tiempo y Forma. Serie VI, Geografía 2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Acta Geochimica Biomed Instrum Technol Geosci. Model Dev. CANCER EPIDEMIOL ERN: Regulation (IO) (Topic) Crit. Rev. Eukaryotic Gene Express Acta Neuropathol. Astrophys. J. Suppl. Ser. Am. Mineral. Nat. Clim. Change EUROSURVEILLANCE Ocean and Coastal Research Int. J. Climatol. ACTA CARDIOL SIN 2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO) Transactions of the American Neurological Association Appl. Clay Sci. Focus on Autism and Other Developmental Disabilities Exp. Cell. Res. Transactions of the American Climatological and Clinical Association. American Climatological and Clinical Association High Pressure Res. Chem. Ecol. Resour. Geol. Erziehungswissenschaftliche Revue Environ. Eng. Sci. Phys. Chem. Miner. Environ. Prog. Sustainable Energy Ecol. Res. Environ. Pollut. Bioavailability Progresos en Obstetricia y Ginecologia Ecol. Eng. ENG SANIT AMBIENT 2012 38th IEEE Photovoltaic Specialists Conference CRANIO Environ. Toxicol. Pharmacol. Geochim. Cosmochim. Acta Nat. Geosci. Acupuncture Research Trends in cell & molecular biology Ecol. Monogr. Ecol. Indic. Atmos. Chem. Phys. Org. Geochem. European Journal of Clinical and Experimental Medicine Clean-Soil Air Water Ecol. Processes 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC) ERN: Other Microeconomics: General Equilibrium & Disequilibrium Models of Financial Markets (Topic) Azerbaidzhanskii Meditsinskii Zhurnal IZV-PHYS SOLID EART+ J. Atmos. Chem. Clim. Change Environmental Claims Journal Basin Res. Environ. Eng. Manage. J. ACTA PETROL SIN Environ. Educ. Res, EUR UROL Conserv. Biol. Environ. Technol. Innovation Asia-Pac. J. Atmos. Sci. Biomedicine (India) Front. Phys. ECOLOGY Annu. Rev. Earth Planet. Sci. 非金属矿 Environmental Control in Biology Adv. Meteorol. Environmental dermatology : the official journal of the Japanese Society for Contact Dermatitis Energy Ecol Environ Equine veterinary journal. Supplement GEOLOGY AAPG Bull. European Journal of Chemistry Engineering Structures and Technologies
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1