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基于科学工作流的铁路行车安全评价系统研究 被引量:10
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作者 杜彦华 吴秀丽 +1 位作者 钱程 刘春煌 《铁道学报》 EI CAS CSCD 北大核心 2012年第12期76-82,共7页
针对铁路运输中列车安全评价的实际需求,依据科学工作流理论,提出一种基于开源软件Kepler的评价系统,从而有效实现行车安全预警并提供辅助决策依据。该系统主要通过扩展Kepler构建:一方面,实现多源监测数据的自动收集和共享融合;另一方... 针对铁路运输中列车安全评价的实际需求,依据科学工作流理论,提出一种基于开源软件Kepler的评价系统,从而有效实现行车安全预警并提供辅助决策依据。该系统主要通过扩展Kepler构建:一方面,实现多源监测数据的自动收集和共享融合;另一方面,增加Kepler的流程管控能力和个性化Web界面。在此基础上,针对列车运行特点,建立模糊综合评价的Kepler流程,对状态不良列车进行跟踪和综合评价,将数据和计算过程灵活组合成一套可配置的、自动化的科学计算流程。以部分现实数据为例,使系统的有效性得到验证。本系统不但能够有效解决行车安全评价问题,而且适用面广,也可应用于其他领域的评价问题。 展开更多
关键词 铁路运输 安全评价 科学工作流 模糊综合评价 kepler
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Kepler’s Conjunction for Two Strong Earthquakes in Türkiye in February 2023
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作者 Alexander N. Safronov 《Open Journal of Earthquake Research》 2023年第2期27-43,共17页
This work is devoted to the study of the relationship between strong earthquakes and planetary configurations using the example of two consecutive strong earthquakes that occurred in Türkiye (Turkey), on February... This work is devoted to the study of the relationship between strong earthquakes and planetary configurations using the example of two consecutive strong earthquakes that occurred in Türkiye (Turkey), on February 6, 2023. It is shown that at the time of the earthquakes, linear alignment of the planets along the Jupiter-Venus-Sun line was observed, that is, the astronomical trigger belonged to the generalized Kepler conjunction scheme (gKc), when the Earth does not participate in the linearization scheme. It is shown that for the first earthquake that occurred at 01:17 UTC, the ratio of the distances between Jupiter-Earth and Jupiter-Mars was close to an integer value equal to 5.993. For the second earthquake that occurred on the same day at 10:25 UTC, no integer resonance ratios were detected, however, it was found that the terrestrial e UTC line at the time of the earthquake passed through the position of Mercury. Recall that the 12-hour line of the eUTC chart is always oriented towards the Sun. The conclusions of the work once again confirm the correctness of the theories of Archimedes and Kepler and convince us of the existence of a gravitational phenomenon that does not depend on the distances and masses of planets, has a pronounced inertial and wave character and does not fit into the general theory of relativity, developed in the last century by Albert Einstein. 展开更多
关键词 Earthquake Archimedes Lever kepler Conjunction INERTIA Gravitational Waves Titius-Bode Law Interference
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动力学发展小史 从亚里士多德到牛顿
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作者 陈方正 《科学文化评论》 2024年第1期5-20,共16页
动力学是推动物理学前进的核心,阐述其自亚里士多德以迄牛顿的几个发展阶段,以概括牛顿革命的渊源和背景,并彰显其作为现代科学典范的《自然哲学之数学原理》正是一部动力学著作。
关键词 动力学 亚里士多德 开普勒 伽利略 牛顿
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Approximate Kepler’s Elliptic Orbits with the Relativistic Effects
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作者 Leilei Jia 《International Journal of Astronomy and Astrophysics》 2013年第1期29-33,共5页
Beginning with a Lagrangian, we derived an approximate relativistic orbit equation which describes relativistic corrections to Keplerian orbits. The critical angular moment to guarantee the existence of periodic orbit... Beginning with a Lagrangian, we derived an approximate relativistic orbit equation which describes relativistic corrections to Keplerian orbits. The critical angular moment to guarantee the existence of periodic orbits is determined. An approximate relativistic Kepler’s elliptic orbit is illustrated by numerical simulation via a second-order perturbation method of averaging. 展开更多
关键词 kepler’s ELLIPTIC ORBITS The RELATIVISTIC kepler Problem Unboundedness AVERAGING
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基于众核处理器的多计算模式构造技术研究 被引量:1
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作者 李叶繁 张凯龙 周兴社 《计算机测量与控制》 CSCD 北大核心 2012年第11期3098-3100,共3页
复杂嵌入式应用领域的具体计算任务不仅需要计算平台具有嵌入式高效能计算能力,而且应具有与应用特点匹配的计算资源结构;面向复杂嵌入式应用领域研究了众核处理机体系架构,在GPU基本计算形态的基础上,依据NVIDIA Kepler架构的特性,进... 复杂嵌入式应用领域的具体计算任务不仅需要计算平台具有嵌入式高效能计算能力,而且应具有与应用特点匹配的计算资源结构;面向复杂嵌入式应用领域研究了众核处理机体系架构,在GPU基本计算形态的基础上,依据NVIDIA Kepler架构的特性,进一步研究、构建了相应的众核组织与处理模式,将其形成3种基本计算模式:单任务并行计算、多任务并行计算、多任务流处理计算,有效地提高了嵌入式高性能计算的效能和灵活性。 展开更多
关键词 嵌入式系统 众核处理器 GPU CUDA kepler 计算模式
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开普勒第三定律与谐和思想 被引量:1
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作者 曾宪明 《北京师范学院学报(自然科学版)》 1991年第2期16-21,共6页
本文介绍了开普勒的宇宙模型的几何学描述,并通过几何学和音乐理论的结合,把每个行星的律音频率与它的运动角速度相类比,得到了用数学定量描述的开普勒第三定律,揭示了开普勒的谐和思想的内涵。
关键词 开普靳 第三定律 宇宙模型 谐和
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基于NVIDIA Kepler的PIC方法并行 被引量:1
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作者 文敏华 林新华 Simon Chong Wee See 《计算机工程与科学》 CSCD 北大核心 2013年第11期100-104,共5页
PIC方法是计算等离子体物理中广泛使用的一种计算方法。通常情况下需要使用大量的计算粒子以达到高的计算精度,这导致非常庞大的计算量。因而PIC方法的加速研究对于减少其时间成本非常有意义。设计了一个基于NVIDIA Kepler GPU的PIC算法... PIC方法是计算等离子体物理中广泛使用的一种计算方法。通常情况下需要使用大量的计算粒子以达到高的计算精度,这导致非常庞大的计算量。因而PIC方法的加速研究对于减少其时间成本非常有意义。设计了一个基于NVIDIA Kepler GPU的PIC算法,并使用CUDA在GPU上实现了该算法。在PIC方法中最耗时间的两个函数collision和mover被移植到GPU上。在实验中使用了NVIDIA新发布的Kepler K20GPU进行这两个函数的性能测试,相比于Intel Sandy Bridge E5-2650,最高获得了30倍的加速。 展开更多
关键词 PIC方法 CUDA NVIDIA kepler
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Astronomical Triggers as a Cause of Strong Earthquakes
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作者 Alexander N. Safronov 《International Journal of Geosciences》 CAS 2022年第9期793-829,共37页
The planetary geometries were studied at the moments of 92 strong earthquakes with a magnitude of more than 8 on the Richter scale (R8+) for the period from 1900 to 2011. Three main planetary schemes were specified, n... The planetary geometries were studied at the moments of 92 strong earthquakes with a magnitude of more than 8 on the Richter scale (R8+) for the period from 1900 to 2011. Three main planetary schemes were specified, namely the schemes of the generalized Archimedes lever (gAL) and the Kepler conjunction (gKc), as well as a new geometry of the triangles of the remote signal catcher (cRS). It was discovered 22 gAL, 42 gKc and 28 cRS geometries, which are 23.9%, 45.7%, and 30.4%, respectively, from the total 92 studying cases. It was found that in some earthquakes;the planetary geometries are absolutely identical, which indicates the universality of the mechanism that caused the earthquake. The triggered effect does not depend on the distance between the planets and the mass of the planets, so the mechanism is identified as an inertial gravitational interaction. The triggered effect increases with the multiplicity of the ratio of distances between planets, as well as with pairwise planetary parallelism, which probably indicates about the wave nature of inertial effects. The triggering effect increases with increasing multiplicity of the ratio of distances between planets, as well as with pairwise planetary parallelism, which probably indicates about the wave nature of inertial effects. According to the Archimedes’ lever principle, the Third Law of Motion is changed by adding a few words. It is assumed that inertia is a special case of gravity, namely gravitational self-induction, which really depends, like any self-induction, only on the geometry of the task. 展开更多
关键词 Earthquake Planet Geometry Ancient Seismology Archimedes Lever kepler Conjunction Third Law of Motion INERTIA Gravity Wave
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图形工作流驱动的空间信息服务链研究
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作者 张建博 刘纪平 王蓓 《计算机研究与发展》 EI CSCD 北大核心 2012年第6期1357-1362,共6页
空间信息服务链由于其空间数据操作对时间的要求以及其应用于工作流对接口要求的特殊性,使得传统的工作流很难调度空间信息服务链,主要的问题在于接口不匹配以及运行效率低下.在传统WPS服务链的基础上,针对其不足提出了基于图形工作流... 空间信息服务链由于其空间数据操作对时间的要求以及其应用于工作流对接口要求的特殊性,使得传统的工作流很难调度空间信息服务链,主要的问题在于接口不匹配以及运行效率低下.在传统WPS服务链的基础上,针对其不足提出了基于图形工作流的空间信息服务链聚合模型.通过分析工作流调度空间信息服务链存在的主要问题,提出相应的接口改进方法,以及基于地址引用、压缩GML的数据调度策略.并结合Kepler工作流引擎,给出了空间信息服务链聚合的具体过程.经过实验证明:基于图形工作流环境,不但突破了以往空间信息服务应用于工作流的接口瓶颈,而且改进的数据流调度策略有助于空间信息服务链执行效率的提高. 展开更多
关键词 空间信息服务 服务链 聚合 GML调度 图形工作流 kepler
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Continued Fraction Evaluation of the Universal Y’s Functions 被引量:1
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作者 Mohammed Adel Sharaf Abdel-naby Saad Saad Nihad Saad Abd El Motelp 《International Journal of Astronomy and Astrophysics》 2015年第1期15-19,共5页
In the present paper, an efficient algorithm based on the continued fractions theory was established for the universal Y’s functions of space dynamics. The algorithm is valid for any conic motion (elliptic, parabolic... In the present paper, an efficient algorithm based on the continued fractions theory was established for the universal Y’s functions of space dynamics. The algorithm is valid for any conic motion (elliptic, parabolic or hyperbolic). 展开更多
关键词 UNIVERSAL kepler EQUATION Continued FRACTION Technique Y-Universal Function
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GENERALIZED HOMOGENEOUS FUNCTIONS AND THE TWO-BODY PROBLEM
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作者 C.Biasi S.M.S.Godoy 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2005年第2期171-178,共8页
A generalization of the homogeneous function concept is studied.An application is done with a solution of the two-body problem.
关键词 homogeneous function generalized homogeneous function kepler's second law two-body problem
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Automating adjoint wave-equation travel-time tomography using scientific workflow
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作者 Xiaofeng Zhang Po Chen Satish Pullammanappallil 《Earthquake Science》 2013年第5期331-339,共9页
Abstract Recent advances in commodity high-performance computing technology have dramatically reduced the computational cost for solving the seismic wave equation in complex earth structure models. As a consequence, w... Abstract Recent advances in commodity high-performance computing technology have dramatically reduced the computational cost for solving the seismic wave equation in complex earth structure models. As a consequence, wave-equation-based seismic tomography techniques are being actively developed and gradually adopted in routine subsurface seismic imaging practices. Wave-equation travel-time tomography is a seismic tomography technique that inverts cross-correlation travel-time misfits using fullwave Frechet kernels computed by solving the wave equation. This technique can be implemented very efficiently using the adjoint method, in which the misfits are back-propagated from the receivers (i.e., seismometers) to produce the adjoint wave-field and the interaction between the adjoint wave-field and the forward wave-field from the seismic source gives the gradient of the objective function. Once the gradient is available, a gradient-based optimization algorithm can then be adopted to produce an optimal earth structure model that minimizes the objective function. This methodology is conceptually straightforward, but its implementation in practical situations is highly complex, error-prone and computationally demanding. In this study, we demonstrate the feasibility of automating wave-equation travel-time tomography based on the adjoint method using Kepler, an open-source software package for designing, managing and executing scientific workflows. The workflow technology allows us to abstract away much of the complexity involved in the implementation in a manner that is both robust and scalable. Our automated adjoint wave-equation travel-time tomography package has been successfully applied on a real active-source seismic dataset. 展开更多
关键词 Adjoint tomography Scientificworkflow Seismic inversion kepler
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Is Highly Organized Life Present on Recently Discovered Planets in Our Galaxy?
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作者 Wennan Long George V. Chilingar 《Atmospheric and Climate Sciences》 2017年第3期298-300,共3页
The question arises whether organized life (as it exists on the Earth) exists on newly-found planets or not, such as Kepler 186f, in our Galaxy. The Earth’s evolution is defined by three critical factors: 1) Solar lu... The question arises whether organized life (as it exists on the Earth) exists on newly-found planets or not, such as Kepler 186f, in our Galaxy. The Earth’s evolution is defined by three critical factors: 1) Solar luminosity, 2) The distance between the Earth and Sun and 3) The Earth’s mass and chemical compositions. All these variables were favorable for the emergence and development of highly-organized life on our Earth. 展开更多
关键词 Origin of LIFE UNIQUENESS of the Earth kepler 186f Newly-Found Planets Earth’s Evolution
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基于科学工作流的海量海底观测数据处理研究
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作者 宋靖东 汤友华 +1 位作者 李秀 马辉 《海洋技术学报》 2017年第2期65-70,共6页
近些年来,在处理由海底观测网站收集到的庞大观测数据的研究中,需引入新的科学工具来支持所需的高性能分布式计算环境。而科学工作流在先进信息基础设施研究中得到广泛重视,成为未来科研环境的具体实现工具。针对这一问题,提出了基于Kep... 近些年来,在处理由海底观测网站收集到的庞大观测数据的研究中,需引入新的科学工具来支持所需的高性能分布式计算环境。而科学工作流在先进信息基础设施研究中得到广泛重视,成为未来科研环境的具体实现工具。针对这一问题,提出了基于Kepler科学工作流的海量海底观测数据处理解决方案,并且研究了系统调用Hadoop集群进行海量数据处理的两种方式及其优缺点;通过实验,对比分析了该两种方式与传统Java编程模式调用Hadoop集群进行数据处理的效率问题,证明了Kepler调用集群的高效性。 展开更多
关键词 科学工作流 HADOOP集群 kepler
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A Solution of Kepler’s Equation
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作者 John N. Tokis 《International Journal of Astronomy and Astrophysics》 2014年第4期683-698,共16页
The present study deals with a traditional physical problem: the solution of the Kepler’s equation for all conics (ellipse, hyperbola or parabola). Solution of the universal Kepler’s equation in closed form is obtai... The present study deals with a traditional physical problem: the solution of the Kepler’s equation for all conics (ellipse, hyperbola or parabola). Solution of the universal Kepler’s equation in closed form is obtained with the help of the two-dimensional Laplace technique, expressing the universal functions as a function of the universal anomaly and the time. Combining these new expressions of the universal functions and their identities, we establish one biquadratic equation for universal anomaly (χ) for all conics;solving this new equation, we have a new exact solution of the present problem for the universal anomaly as a function of the time. The verifying of the universal Kepler’s equation and the traditional forms of Kepler’s equation from this new solution are discussed. The plots of the elliptic, hyperbolic or parabolic Keplerian orbits are also given, using this new solution. 展开更多
关键词 keplerian MOTION UNIVERSAL kepler’s EQUATION UNIVERSAL ANOMALY TWO-DIMENSIONAL LAPLACE Transforms
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Calculations for Density of Quark Core Consisting of Mono Flavored Closely Packed Quarks inside Neutron Star
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作者 Jehangir A. Dar Pawan Kumar Singh Ram Swaroop 《International Journal of Astronomy and Astrophysics》 2015年第4期258-266,共9页
The attempt has been taken to calculate the density of stars possessing quark matter core using sphere packing concept of crystallography. The quark matter has been taken as solid in nature as predicted in references ... The attempt has been taken to calculate the density of stars possessing quark matter core using sphere packing concept of crystallography. The quark matter has been taken as solid in nature as predicted in references 36 and 37, and due to immense gravitational pressure at the core of the star the densest packing of quarks as spheres has been assumed to calculate the packing fraction Φ, thus the density ρ of the matter. Three possible types of pickings—mono-sized sphere packing, binary sphere packing and ternary sphere packing, have been worked out using three possible types of quark matter. It has been concluded that no value about the ρ of quark matter can be calculated using binary and ternary packing conditions and for mono-sized packing condition different flavor quark matters of different values in the density have been calculated using results from the experiments done by HI, ZEUS, L3 and CDF Collaborations about the radius limit of quark. For example, for u quark matter ρ ranges from 4.0587 × 1048 - 7.40038 × 1048 MeV/c2 cm3 using results of L3 Collaboration, for s quark matter 15.91794 × 1048 - 17.6866 × 1048 MeV/c2 cm3, etc. 展开更多
关键词 NEUTRON Star Packing Fraction QUARK MATTER QUARK GLUON MATTER kepler’s Conjecture Theorem NEUTRON
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A New Formulation of Classical Mechanics—Part 2
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作者 Federico Petrovich 《Journal of Applied Mathematics and Physics》 2016年第5期939-966,共28页
In the first part of this paper, we found a more convenient algorithm for solving the equation of motion of a system of n bodies. This algorithm consists in solving first the trajectory equation and then the temporal ... In the first part of this paper, we found a more convenient algorithm for solving the equation of motion of a system of n bodies. This algorithm consists in solving first the trajectory equation and then the temporal equation. In this occasion, we will introduce a new way to solve the temporal equation by curving the horizontal axis (the time axis). In this way, we will be able to see the period of some periodic systems as the length of a certain curve and this will allow us to approximate the period in a different way. We will also be able to solve some problems like the pendulum one without using elliptic integrals. Finally, we will solve Kepler’s problem using all the formalism. 展开更多
关键词 Classical Mechanics PENDULUM kepler’s Problem
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The Classical Limit of the Quantum Kepler Problem
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作者 A. Martín-Ruiz J. Bernal +1 位作者 Alejandro Frank Adrián Carbajal-Dominguez 《Journal of Modern Physics》 2013年第6期818-822,共5页
The classical limit of the quantum mechanical Kepler problem is derived by using a simple mathematical procedure recently proposed. The method is based both on Bohr’s correspondence principle and the local averages o... The classical limit of the quantum mechanical Kepler problem is derived by using a simple mathematical procedure recently proposed. The method is based both on Bohr’s correspondence principle and the local averages of the quantum probability distribution. We illustrate in a clear fashion the difference between Planck’s limit and Bohr’s correspondence principle. We discuss the confinement effect in macroscopic systems. 展开更多
关键词 kepler PROBLEM CLASSICAL Limits
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GPGPU Cloud: A Paradigm for General Purpose Computing
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作者 Liang Hu Xilong Che Zhenzhen Xie 《Tsinghua Science and Technology》 SCIE EI CAS 2013年第1期22-33,共12页
The Kepler General Purpose GPU(GPGPU) architecture was developed to directly support GPU virtualization and make GPGPU cloud computing more broadly applicable by providing general purpose computing capability in the... The Kepler General Purpose GPU(GPGPU) architecture was developed to directly support GPU virtualization and make GPGPU cloud computing more broadly applicable by providing general purpose computing capability in the form of on-demand virtual resources. This paper describes a baseline GPGPU cloud system built on Kepler GPUs, for the purpose of exploring hardware potential while improving task performance. This paper elaborates a general scheme which defines the whole cloud system into a cloud layer, a server layer, and a GPGPU layer. This paper also execution mechanism of each layer on a GPGPU cloud. ustrates the hardware features, task features, scheduling mechanism, and Thus, this paper provides a better understanding of general-purpose computing 展开更多
关键词 kepler GK110 GPGPU cloud VIRTUALIZATION SMX
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有关开普勒科学贡献的几点补充 被引量:2
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作者 邓可卉 《内蒙古师范大学学报(自然科学汉文版)》 CAS 1995年第1期77-80,共4页
介绍开普勒在彗星特征、万有引力理论以及光学和数学等一些领域的科学成就,对他的“宇宙谐和”的观点作了分析,同时探讨了其科学成就在科学发展史中的地位。
关键词 开普勒 科学贡献 慧星 天文学 万有引力理论
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