Advanced Studies in Theoretical Physics最新文献_第6页

Blind source extraction of HPGe preamplifier's output signals using the thinICA algorithm: detection and identification of gamma ray emitters 利用thinICA算法对HPGe前置放大器输出信号进行盲源提取:伽玛射线发射体的检测与识别

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/ASTP.2014.48117

A. Mekaoui, Lhachmi El Badri, E. Hamzaoui, R. Moursli

{"title":"Blind source extraction of HPGe preamplifier's output signals using the thinICA algorithm: detection and identification of gamma ray emitters","authors":"A. Mekaoui, Lhachmi El Badri, E. Hamzaoui, R. Moursli","doi":"10.12988/ASTP.2014.48117","DOIUrl":"https://doi.org/10.12988/ASTP.2014.48117","url":null,"abstract":"In this study, the thin independent component analysis algorithm is used to solve the blind source extraction problem in the case where the observed mixtures are defined as the HPGe preamplifier’s output signals. These last correspond to the response of the detector to a combination of gamma radiation emitters having different levels of radioactivity. Indeed, on the basis of the performance index values, we conclude that this algorithm is the best blind source extraction method to analyze our data. Once the separation task is achieved, we evaluate the signal to noise ratio from individual columns of the mixing matrix. The values of this parameter permit us to detect easily the number of radionuclides used in the  Corresponding author 1158 Abdelhamid Mekaoui et al. experiment. Also, we calculate and plot the correlation functions between the signals recorded using one radioactive element and the extracted independent components. The interpretation of the gotten graphics allows us to associate each estimated independent component to the appropriate gamma radiation emitter.","PeriodicalId":127314,"journal":{"name":"Advanced Studies in Theoretical Physics","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122019018","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

The magnetized relativistic Boltzmann equation with a hard potential 具有硬势的磁化相对论玻尔兹曼方程

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/astp.2020.91465

Raoul Ayissi, Aubin Nana Mbajoun, R. Essono, R. M. Etoua

引用次数: 0

A massively parallel virtual machine for SIMD architectures 用于SIMD架构的大规模并行虚拟机

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/ASTP.2015.519

M. Youssfi, O. Bouattane, M. Bensalah

{"title":"A massively parallel virtual machine for SIMD architectures","authors":"M. Youssfi, O. Bouattane, M. Bensalah","doi":"10.12988/ASTP.2015.519","DOIUrl":"https://doi.org/10.12988/ASTP.2015.519","url":null,"abstract":"In this paper, we present a new model of a massively parallel Single Instruction Multiple Data (SIMD) structure machines in a distributed system. Among the modeled machines, we distinguish the linear, 2D, 3D meshes, pyramidal structures and GPU structure. All these computers are based physically on a multitude of fine grained processing elements (PE) arranged and coupled according to their associated topological pattern. In this model the host is represented by a distributed agent. Each virtual host agent, deployed in a physical computer, manages a local parallel virtual computer composed by a set of virtual processing elements (VPE). Each VPE is represented by a self threaded object. The distributed virtual host agents are interconnected throw a multi agent system platform. The developed software is based on a hard kernel of a parallel virtual machine in which we translate all the physical properties of its different components. This kernel is based on an abstract layer which can be easily extended to the other topological structures. To implement a parallel program in the proposed platform, we have developed a new parallel programming language based on XML and its compiler which allow editing, compiling and running parallel programs. To illustrate the performance of this model, we present an example of a parallel program implementation for the edge detection of a brain MRI image presenting pathology. 238 M. Youssfi, O. Bouattane and M. O. Bensalah","PeriodicalId":127314,"journal":{"name":"Advanced Studies in Theoretical Physics","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128627739","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

Scalar field equation with torsion induced non linearity: aspects of solutions in RW and Minkowski space-time 具有扭转诱导非线性的标量场方程:RW和Minkowski时空解的方面

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/astp.2020.91471

A. Zecca

引用次数: 0

The Entropy of the Square-Well Fluid I. The Random Phase Approximation 方井流体的熵1 .随机相位近似

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/ASTP.2013.13045

N. Dubinin, A. Yuryev, V. Filippov

引用次数: 1

A Model of Electric Field in the Vicinity of Charged Particle 带电粒子附近的电场模型

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/ASTP.2013.426

J. Kaczmarek

{"title":"A Model of Electric Field in the Vicinity of Charged Particle","authors":"J. Kaczmarek","doi":"10.12988/ASTP.2013.426","DOIUrl":"https://doi.org/10.12988/ASTP.2013.426","url":null,"abstract":"In this paper a method of modelling electric field near charged particles is introduced. Main assumption considered states that the field takes a constant value on surfaces of particles. This value is maximal admissible value of the electric field in the vacuum medium. Such an assumption induces immediately the problem how to model constant value of charge for particles with various sizes. It is shown that modelling of such a situation is possible when we assume electric field which is considerably more flat near the particle as compared with Coulomb field introduced on larger distances from the particle. Equations which describe behaviour of the electric field in the vicinity of the charged particles are discussed. They are derived with the help of assumptions introduced for four-component vacuum medium. Dominant assumption related to interactions within components states that elements of the medium responsible for generation of electric field attract themselves. Derived equations are of second order with respect to space variables and describe also the Coulomb law at larger distances from the particle. Such a possibility is attained by introduction displacements associated with intensity of electric field. This step also makes possible to adopt methods of continuum mechanics in description of the vacuum medium behaviour. Possibility of breaking the charge conservation law is discussed within this method of modelling.","PeriodicalId":127314,"journal":{"name":"Advanced Studies in Theoretical Physics","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130357090","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

Measurability. Gravity and gauge theories in measurable form at low and high energies 可测性。在低能和高能的可测量形式的重力和规范理论

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/ASTP.2019.81248

A. Shalyt-Margolin

引用次数: 0

Wave propagating on cord in static viscous fluid under non-gravitational field 非重力场作用下静态粘性流体中波在弦上的传播

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/astp.2020.91491

Toru Shimizu, K. Nakayama

引用次数: 2

The scattering processes 3He on spherical nuclei 28,30,32Si and the strong coupling method channels he在球核28,30,32si上的散射过程和强耦合方法通道

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/astp.2015.5558

K. Baktybayev, A. Dalelkhankyzy, N. Koilyk, М. К. Baktybayev

引用次数: 0

Proposition of pathways modulation probability, generalized Liquid Drop Model methods to determine the Qalpha-value of heavy and super heavy nuclei 路径调制概率的命题，确定重核和超重核Q值的广义液滴模型方法

Advanced Studies in Theoretical Physics Pub Date : 1900-01-01 DOI: 10.12988/ASTP.2018.8729

F. M. Fathi, H. Hadi

{"title":"Proposition of pathways modulation probability, generalized Liquid Drop Model methods to determine the Qalpha-value of heavy and super heavy nuclei","authors":"F. M. Fathi, H. Hadi","doi":"10.12988/ASTP.2018.8729","DOIUrl":"https://doi.org/10.12988/ASTP.2018.8729","url":null,"abstract":"The Qvalue of alpha decay of asset of heavy and super heavy nuclei chain from Z=78 to 120 have been analyzed systematically within the propose method of probability of modulation pathways (ppnn, pnpn, pnnp, nnpp, npnp and nppn) beside the generalized Liquid Drop Model. The results are reasonable agreement with the published experimental data for alpha decay Qαvalue of studied nuclei. The first method has shown the possibility to forming of alpha particle of any proposed pathway. Also has been shown it is not significantly affected by nuclei with closed shell or nearby. The second method also showed acceptable results that corresponding to the experimental values of the wide range of the studied nuclei that decay of alpha particle emission along with nuclei that dissolve spontaneously. For this purpose, a computer program was prepared in Mat lab software, to reduce many of the data, along with reducing many of the time and effort. The values of unknown masses were obtain for some nuclei in atomic mass units through another program was prepared in Mat lab software with high accuracy. These methods may help in synthesis and identification of new heaviest nuclei.","PeriodicalId":127314,"journal":{"name":"Advanced Studies in Theoretical Physics","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114733228","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