computational methods in science and technology最新文献_第6页

Non-isothermal Activation Kinetics 非等温活化动力学

computational methods in science and technology Pub Date : 2017-09-30 DOI: 10.12921/CMST.2017.0000022

A. Arango-Restrepo, J. Rubí

引用次数: 1

Intelligent Information Bypass for More Efficient Emergency Management 智能信息旁路，更有效的应急管理

computational methods in science and technology Pub Date : 2017-06-30 DOI: 10.12921/CMST.2017.0000019

Z. Vetulani, J. Osinski

引用次数: 3

Effects of Radiation and Porosity of the Medium on MHD Flow Past an Inclined Plate in the Presence of Hall Current 霍尔电流存在下介质辐射和孔隙度对斜板MHD流动的影响

computational methods in science and technology Pub Date : 2017-06-30 DOI: 10.12921/CMST.2017.0000003

U. S. Rajput, G. Kumar

{"title":"Effects of Radiation and Porosity of the Medium on MHD Flow Past an Inclined Plate in the Presence of Hall Current","authors":"U. S. Rajput, G. Kumar","doi":"10.12921/CMST.2017.0000003","DOIUrl":"https://doi.org/10.12921/CMST.2017.0000003","url":null,"abstract":"The present study deals with an analysis of the effects of radiation and porosity of the medium on unsteady natural convection flow of a viscous, incompressible and electrically conducting fluid past an impulsively started inclined plate under the influence of transversely applied uniform magnetic field and Hall current. The medium of the flow is taken as porous. The governing equations involved in the present analysis are solved by the Laplace-transform technique. The results obtained are discussed with the help of graphs drawn for different parameters like thermal Grashof number, mass Grashof Number, Prandtl number, Hall current, radiation, permeability, magnetic field parameter and Schmidt number. The numerical values obtained for skin-friction and Nusselt number have been tabulated. The objective of this study is to analyze radiation and the porosity of the medium in the MHD flow model. In the study we found that the velocity in the boundary layer increases with the values of radiation and porosity of the medium. It is also observed that radiation and porosity of the medium increases the skin-friction at the wall surface. The results of the study are found to be in agreement with the actual flow. The importance of the problem can be seen in cooling of electronic components of a nuclear reactor, bed thermal storage and heat sink in the turbine blades.","PeriodicalId":10561,"journal":{"name":"computational methods in science and technology","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78010490","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: 3

Modelling a Bistable System Strongly Coupled to a Debye Bath: A Quasiclassical Approach Based on the Generalised Langevin Equation 双稳系统与德拜浴强耦合的建模:基于广义朗之万方程的准经典方法

computational methods in science and technology Pub Date : 2017-04-12 DOI: 10.12921/cmst.2017.0000006

L. Stella, H. Ness, Christiane S. Lorenz, L. Kantorovich

{"title":"Modelling a Bistable System Strongly Coupled to a Debye Bath: A Quasiclassical Approach Based on the Generalised Langevin Equation","authors":"L. Stella, H. Ness, Christiane S. Lorenz, L. Kantorovich","doi":"10.12921/cmst.2017.0000006","DOIUrl":"https://doi.org/10.12921/cmst.2017.0000006","url":null,"abstract":"Bistable systems present two degenerate metastable configurations separated by an energy barrier. Thermal or quantum fluctuations can promote the transition between the configurations at a rate which depends on the dynamical properties of the local environment (i.e., a thermal bath). In the case of classical systems, strong system-bath interaction has been successfully modelled by the Generalised Langevin Equation (GLE) formalism. Here we show that the efficient GLE algorithm introduced in Phys. Rev. B 89, 134303 (2014) can be extended to include some crucial aspects of the quantum fluctuations. In particular, the expected isotopic effect is observed along with the convergence of the quantum and classical transition rates in the strong coupling limit. Saturation of the transition rates at low temperature is also retrieved, in qualitative, yet not quantitative, agreement with the analytic predictions. The discrepancies in the tunnelling regime are due to an incorrect sampling close to the barrier top. The domain of applicability of the quasiclassical GLE is also discussed.","PeriodicalId":10561,"journal":{"name":"computational methods in science and technology","volume":"25 1","pages":"251-264"},"PeriodicalIF":0.0,"publicationDate":"2017-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79460192","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

Ian Snook Additional Prize 2016 2016年伊恩·斯努克特别奖

computational methods in science and technology Pub Date : 2017-03-30 DOI: 10.12921/CMST.2017.0000010

M. Stroiński, J. Weglarz, K. Wojciechowski

引用次数: 0

Some Notes on Extracting Linguistic Summaries Built with Epistemic Modalities and Natural Language Connectives of Equivalence 关于利用认知模态和自然语言对等连接词构建语言摘要的若干注意事项

computational methods in science and technology Pub Date : 2017-03-30 DOI: 10.12921/CMST.2016.0000056

R. Katarzyniak, Wojciech A. Lorkiewicz, Dominik P. Wiecek

{"title":"Some Notes on Extracting Linguistic Summaries Built with Epistemic Modalities and Natural Language Connectives of Equivalence","authors":"R. Katarzyniak, Wojciech A. Lorkiewicz, Dominik P. Wiecek","doi":"10.12921/CMST.2016.0000056","DOIUrl":"https://doi.org/10.12921/CMST.2016.0000056","url":null,"abstract":"In this paper we deal with an original technically oriented model for cognitive semantics. As the expected area of application we focus on the process of extraction of modal linguistic summaries from data managed by autonomous components of ambient systems and intelligent environments. As such, the cognitive semantics is defined for a particular case of modal natural language statements with epistemic modalities. The statements of interest are built with natural language operators, representing epistemic modalities (related to the main cognitive states of knowledge certainty: full certainty, strong belief and epistemic possibility), and natural language connectives of equivalence. Furthermore, an approach to their effective processing by autonomous computational systems is designed. An internal architecture of the autonomous computational component is designed with respect to modular model for natural language processing with separate modules for epistemic and semantic memory storage and processing. An original theoretical concept underlying the model of semantic memory is a holon defined as a collection of complementary linguistic protoforms. Finally, we provide several illustrative computational examples of linguistic summaries’ extraction, based on artificial and real data.","PeriodicalId":10561,"journal":{"name":"computational methods in science and technology","volume":"23 11 1","pages":"19-41"},"PeriodicalIF":0.0,"publicationDate":"2017-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84470200","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

Supporting the Creation of Some Class of Well-founded OWL-DL Ontologies 支持创建一些基础良好的OWL-DL本体类

computational methods in science and technology Pub Date : 2017-03-30 DOI: 10.12921/CMST.2016.0000064

J. Cybulka

引用次数: 0

Reflection and Refraction of Plane Harmonic Waves at an Interface Between Elastic Solid and Magneto-thermoelastic Diffusion Solid with Voids 具有孔洞的磁热弹性扩散固体与弹性固体界面上平面谐波的反射与折射

computational methods in science and technology Pub Date : 2017-03-30 DOI: 10.12921/CMST.2016.0000036

Rajesh Kumar, T. Kansal

引用次数: 8

Cold Provocation and Active Thermography in Medical Screening 医学筛查中的冷激发和主动热成像

computational methods in science and technology Pub Date : 2017-03-29 DOI: 10.12921/CMST.2017.0000007

M. Strzelecki, M. Strąkowska, R. Strąkowski, A. Kaszuba

引用次数: 7

Non-monotonic Relaxation in a HarmonicWell 谐波阱中的非单调弛豫

computational methods in science and technology Pub Date : 2017-01-01 DOI: 10.12921/CMST.2017.0000001

M. King, O. Jepps

{"title":"Non-monotonic Relaxation in a HarmonicWell","authors":"M. King, O. Jepps","doi":"10.12921/CMST.2017.0000001","DOIUrl":"https://doi.org/10.12921/CMST.2017.0000001","url":null,"abstract":"The dissipation function of Evans and Searles has its origins in describing entropy production, yet it has a straightforward dynamical interpretation as well. The ability to consider either dynamical or thermodynamical contexts deepens our understanding of the dissipation function as a concept, and of numerical results involving the dissipation function. One recent, important application of the dissipation function is in relaxation to equilibrium. Here we look at relaxation in a system of interacting molecules that are confined within a harmonic potential, undergoing Hamiltonian dynamics. We note some similarities, but also important differences, to previous studies. The dissipation function sheds light on the periodic return of our system towards its initial state. We find that intermolecular interactions play a much more significant role in the relaxation toward a non-uniform spatial distribution (induced by a conservative background field) than they do toward a uniform distribution, which is reflected in the strongly non-monotonic relaxation we observe. We also find that the maximum dissipation does not occur in the long-time limit, as one might expect of a relaxation process, but shortly after relaxation begins, beyond which a significant net overall decrease in the dissipation function is observed.","PeriodicalId":10561,"journal":{"name":"computational methods in science and technology","volume":"95 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90275569","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