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Estimation of radiation source distribution using machine learning with γ ray energy spectra 基于γ射线能谱的机器学习估计辐射源分布
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2020-01-01 DOI: 10.15748/jasse.7.71
Takero Uemura, K. Yamaguchi
{"title":"Estimation of radiation source distribution using machine learning with γ ray energy spectra","authors":"Takero Uemura, K. Yamaguchi","doi":"10.15748/jasse.7.71","DOIUrl":"https://doi.org/10.15748/jasse.7.71","url":null,"abstract":". A method is proposed for estimating the original radiation source distribution by machine learning using the dose and energy spectrum of γ rays emitted from radiation sources placed at various positions. This method does not require complicated parameter set-tings and can be also applied when there is a shield liked Pb between the radiation source and the measurement point. The estimation results displayed the original radiation source distribution with high accuracy. It is expected to be used for decontamination and decommissioning by developing this method.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67361496","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
Sphere-Function-Based Shape Modelling of Open Cell Metal Foam with Plateau Borders 基于球函数的高原边界开孔金属泡沫形状建模
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2020-01-01 DOI: 10.15748/jasse.7.89
Yuya Hanaoka, T. Itoh, S. Nakata, Keiko Watanabe
{"title":"Sphere-Function-Based Shape Modelling of Open Cell Metal Foam with Plateau Borders","authors":"Yuya Hanaoka, T. Itoh, S. Nakata, Keiko Watanabe","doi":"10.15748/jasse.7.89","DOIUrl":"https://doi.org/10.15748/jasse.7.89","url":null,"abstract":"To construct an open cell metal foam model, a simple method using spheres has been proposed. In this method, spheres are arranged so that the edges are constructed as Plateau borders, and an implicit surface f (x) = 0 combined by constructive solid geometry is generated from these spheres. The open cell metal foam model generated by the proposed method has edges and junctions, and the cross-sections of Plateau borders in the model are concave triangles. In the proposed method, the open cell model that has a periodic structure can be generated by adjusting the arrangement of spheres. In addition, by employing the pnorm-based implicit surfaces, the proposed method has been extended so that various kinds of open cell model can be constructed. Although the open cell models generated by the proposed method are midair models, they can be converted to solid models constructed as voxel meshes. Furthermore, an arbitrary shape defined by an implicit surface g(x) = 0 can be represented as a collection of extracted cells in the voxel mesh of open cell model.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67361717","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
Visualization of the Plasma Shape in a Force Free Helical Reactor, FFHR 无力螺旋反应器中等离子体形状的可视化，FFHR
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2020-01-01 DOI: 10.15748/jasse.7.151
K. Hu, Qixiong Wang, K. Koyamada, H. Ohtani, T. Goto, J. Miyazawa
{"title":"Visualization of the Plasma Shape in a Force Free Helical Reactor, FFHR","authors":"K. Hu, Qixiong Wang, K. Koyamada, H. Ohtani, T. Goto, J. Miyazawa","doi":"10.15748/jasse.7.151","DOIUrl":"https://doi.org/10.15748/jasse.7.151","url":null,"abstract":"Using magnetic field to confine the plasma can realize controlled nuclear fusion. A device called Force Free Helical Reactor (FFHR) using helical coils to generate a magnetic trap is being designed by National Institute for Fusion Science (NIFS) in Japan. Because the FFHR has the plasma with a complicated three-dimensional (3D) structure, 3D design of the in-vessel components is necessary. In the past, the design of the in-vessel components has been conducted based on the discrete two-dimensional poloidal cross-sectional shapes. However, this method is not effective and complete check of the interference is difficult. Since plasma movement follows the magnetic field lines, the plasma shape could be generated from them. Marching cubes method is applied for generating the polygon mesh. A graphic software is used for modifying and rendering.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67360731","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: 2
Deterministic and stochastic computations of mysterious internal flows: based on a nonlinear local correction method with global conservativity 神秘内部流动的确定性和随机计算:基于全局保守性的非线性局部校正方法
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2020-01-01 DOI: 10.15748/jasse.7.51
R. Konagaya, K. Naitoh, Hiroki Kijima
{"title":"Deterministic and stochastic computations of mysterious internal flows: based on a nonlinear local correction method with global conservativity","authors":"R. Konagaya, K. Naitoh, Hiroki Kijima","doi":"10.15748/jasse.7.51","DOIUrl":"https://doi.org/10.15748/jasse.7.51","url":null,"abstract":"The present paper shows a new approach for solving two types of fluid problems, which has recently emerged and has been an unsolved mysteriously for over 100 years. The first problem emerged recently is a very small amount of numerical errors comparable to pollutant emissions such as unburned hydrocarbon fuel (HC) and NOx at order of ppm or less. A new nonlinear numerical method of global and local corrections for the deterministic compressible Navier-Stokes equation for multi-components of gases is proposed and tested to overcome this first problem, while accurately evaluating fluid-dynamic instability related to turbulence and thermal efficiency as result of spatially-integrated thermodynamic quantities, related to total amount of CO2 exhausted, in power systems including combustion engines. It is stressed that the present nonlinear correction method applied for the stochastic Navier-Stokes equation is also effective for the second mysterious problem which has been unsolved for over 100 years, which is the spatial transition point from laminar to turbulent flows in pipes.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67361229","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
Helmet-Mounted Inverted-F Antenna at VHF Band VHF频段头盔反f天线
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2020-01-01 DOI: 10.15748/jasse.7.291
N. Michishita, Yusuke Saita, H. Morishita, M. Ameya, M. Hirose, S. Kurokawa
{"title":"Helmet-Mounted Inverted-F Antenna at VHF Band","authors":"N. Michishita, Yusuke Saita, H. Morishita, M. Ameya, M. Hirose, S. Kurokawa","doi":"10.15748/jasse.7.291","DOIUrl":"https://doi.org/10.15748/jasse.7.291","url":null,"abstract":". A helmet for disaster prevention must be worn to prevent secondary disasters in rescue and evacuation activities when a disaster occurs. Helmet antennas have been widely developed as wearable antennas. In this paper, we investigated the effect of ohmic loss due to the material of the hemispherical conductor. In addition, the validity of the simulation results was verified through experiment. The loading position of the antenna element was examined to further improve the gain. As a result, the maximum gain of −2.6 dBi and the local specific absorption rate value of 0.07 W/kg was achieved at 150 MHz.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67361025","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: 2
Development of an agent-based model for the analysis of the effect of consumer panic buying on supply chain disruption due to a disaster 建立了一个基于主体的模型，用于分析灾难导致的消费者恐慌性购买对供应链中断的影响
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2020-01-01 DOI: 10.15748/jasse.7.102
Rithika Dulam, K. Furuta, T. Kanno
{"title":"Development of an agent-based model for the analysis of the effect of consumer panic buying on supply chain disruption due to a disaster","authors":"Rithika Dulam, K. Furuta, T. Kanno","doi":"10.15748/jasse.7.102","DOIUrl":"https://doi.org/10.15748/jasse.7.102","url":null,"abstract":"The present paper is an effort to introduce the modeling architecture of analyzing the response of a supply chain of bottled water due to consumer panic buying triggered by a large-scale natural disaster. An agent-based system is used to model a simplistic consumer purchase model and a supply chain model. Disaster prompts panic buying among the consumers, which disturbs the supply chain. The strategies used to control the excess demand such as limiting sales per person is considered to understand the effect on the supply chain. A preliminary study of the response of the supply chain due to the disaster and its consequences are presented in this paper.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15748/jasse.7.102","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67360466","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
Modeling the cambering of the flapping wings of an insect using rectangular shell finite elements 用矩形壳有限元对昆虫扑翼的弯曲进行建模
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2020-01-01 DOI: 10.15748/jasse.7.181
M. Onishi, D. Ishihara
{"title":"Modeling the cambering of the flapping wings of an insect using rectangular shell finite elements","authors":"M. Onishi, D. Ishihara","doi":"10.15748/jasse.7.181","DOIUrl":"https://doi.org/10.15748/jasse.7.181","url":null,"abstract":"Cambering in the flapping wings of insects plays an important role in the aerodynamic performance of their flight. In a previous study, the authors proposed a wing model using shell finite elements to elucidate the mechanism of cambering. However, the analysis of a strongly coupled fluid–structure system using this model would be quite computationally expensive because of the necessity of robust mesh-moving techniques. Therefore, in this study, a new wing model using rectangular shell finite elements is proposed. In the proposed model, the veins and membranes are described as pseudo-elastic materials. The cambering of the proposed model is investigated by comparison with the previous model.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"19 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67360554","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: 4
Shared Control Design Methodologies of an Electric Wheelchair for Individuals with Severe Disabilities using Reinforcement Learning 基于强化学习的重度残疾人电动轮椅共享控制设计方法
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2020-01-01 DOI: 10.15748/jasse.7.300
Lele Xi, M. Shino
{"title":"Shared Control Design Methodologies of an Electric Wheelchair for Individuals with Severe Disabilities using Reinforcement Learning","authors":"Lele Xi, M. Shino","doi":"10.15748/jasse.7.300","DOIUrl":"https://doi.org/10.15748/jasse.7.300","url":null,"abstract":"Individuals with severe disabilities typically suffer from lack of muscle power and deformation of their hands. This significantly affects their ability to operate an Electric Wheelchair (EW) especially when using joystick controllers because one operation of a joystick affects both the straight and turning motions of an EW. Thus, individuals with severe disabilities typically exhibit difficulties in operating an EW, especially in the cases that require fine steering capabilities. In contrast to autonomous driving, the study proposes a novel shared control method using reinforcement learning considering utilizing users' residual physical functions. With the use of online learning, the shared controller provides proper assistance based on the driving environments and each user's input characteristics. The effectiveness and the characteristics of the novel shared controller are discussed via simulations.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67361120","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
Cyclotron Emission with a Helical Wavefront from an Electron Accelerated by the Circularly Polarized Wave 圆极化波加速电子的螺旋波前回旋辐射
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2020-01-01 DOI: 10.15748/jasse.7.34
Y. Goto, S. Kubo, T. Tsujimura
{"title":"Cyclotron Emission with a Helical Wavefront from an Electron Accelerated by the Circularly Polarized Wave","authors":"Y. Goto, S. Kubo, T. Tsujimura","doi":"10.15748/jasse.7.34","DOIUrl":"https://doi.org/10.15748/jasse.7.34","url":null,"abstract":"In this paper, we calculated the radiation from the state where an electron in cyclotron motion under the uniform magnetic field Bex was accelerated by the externally applied circularly polarized wave with strong Ein and Bin. The electron was accelerated in the parallel direction by the term β⊥ × Bin (β⊥: perpendicular velocity of the electron) as well as in the perpendicular direction by the electric field of the wave Ein. Then, the electron can be resonantly accelerated when the Bex is set to the magnetic field strength which is equivalent to frequency of the externally applied circularly polarized wave. The radiation from such an accelerated electron was confirmed to have helical wavefront at harmonics cyclotron frequency.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67361181","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: 2
Numerical verification for positive solutions of Allen–Cahn equation using sub- and super-solution method Allen-Cahn方程正解的子解和超解数值验证
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2020-01-01 DOI: 10.15748/jasse.7.136
Y. Matsushima, Kazuaki Tanaka, S. Oishi
{"title":"Numerical verification for positive solutions of Allen–Cahn equation using sub- and super-solution method","authors":"Y. Matsushima, Kazuaki Tanaka, S. Oishi","doi":"10.15748/jasse.7.136","DOIUrl":"https://doi.org/10.15748/jasse.7.136","url":null,"abstract":"This paper describes a numerical verification method for positive solutions of the Allen–Cahn equation on the basis of the suband super-solution method. Our application range extends to global-in-time solutions that converge or sufficiently approach to stable stationary solutions. The proposed verification method has almost the same memory requirements as the computation for obtaining an approximate solution.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67360594","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
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