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一维无序系统本征矢的解法 总被引:5,自引:0,他引:5
本文提出了一种直接求解五对角厄米特矩阵本征矢的方法,即通过代数运算求出本征矢,而不是用三对角块矩阵来解。该方法对计算一维无序系统的本征矢特别适用。计算结果表明,此方法的存储量小,计算精度高,速度快,并可计算上十万个点阵的无序系统本征矢。 相似文献
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本文针对斜光束反射镜扫描系统一些结构参数的选择作了分析,推出了适合于斜光束反射镜扫描系统的计算公式。并在现有的一些共平面的反射镜扫描系统的计算方法的基础上,根据斜光束的反射镜扫描系统的特点,提出了适于倾斜狭缝像面为圆柱面的情况下的代替圆参数计算方法。因为这一方法是借助于计算机,使用最优化技术进行计算的,所以具有省时,易得到最优结果的特点。故这一方法为该类型的高速摄影机的设计计算提供了方便。 相似文献
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人工智能研究的物理学途径 总被引:1,自引:0,他引:1
近年来,人工智能研究的物理学途径已越来越受到人们的关注,这一途径的实现方式主要有两种:一是把已有的物理理论和方法直接用于研究计算系统,以达到对计算系统的性质和规律的认识,另一是依据某些计算系统与物理的相似性,把计算问题转换为对应的物理问题,再用物理方法建构有效的算法加以求解,文章着重介绍运用物理学途径研究计算系统的相变和解决多自主体系统的目标满足问题所取得的进展,并指出了这一途径的优点和应该注意的问题。 相似文献
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作者在前两篇论文[1,2]中曾介绍过用综合四元数及复四元数计算平面镜系统的方法,讲述如何利用这种方法计算由两面、三面及四面镜组成的基本平面镜系统。按照这种方法,计算可以简化为算出平面镜系统的作用算子的正则形式。按此算子的正则形式,易于确定平面镜系统变换空间的方式。该法与其它方法特别是与向量矩阵法比较,优点在于它们不与选定的特殊坐标系相联系,因此在计算过程中,对计算结果不需要进行从一个坐标系到另一坐标系的换算。在论文[1,2]中讨论了一个正面问题:按已知的物体与平面镜系统的位置,确定象在平行光路或在会聚光路中的位置。 相似文献
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由等离子体引出强流离子束的光学数值模拟 总被引:2,自引:2,他引:0
本文叙述了中性束注入器中的强流离子源引出系统离子束光学性质的数值模拟方法,并给出了典型计算结果。计算结果表明:用这种方法能反映强流离子源引出系统最本质的束光学性质,可供选取和研究强流离子束光学系统之用。 相似文献
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为了实现对自发裂变中子源能量、多重性和中子角关联分布的数值模拟,开发了根据裂变过程,逐步给出裂变中子多重性、能量和角分布等参数的NESF数值模拟程序,并将该程序集成到现有中子输运软件中.重点介绍我们开发的用于模拟自发裂变中子源能量、多重性和中子角关联分布的程序的背景、物理依据、程序流程,以及基于该程序开展的中子角关联分布特征与核部件特征关联的数值模拟. 相似文献
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We describe the structure and the use of a program written in the algebraic programming languagereduce 2, giving the super-Hamiltonian and supermomenta constraints, as well as Hamilton's canonical equations in terms of the canonical variables, for vacuum relativistic space-times. The program uses as input the components of the spatial metric tensor and of the corresponding canonically conjugate momenta in a coordinate or in a spatial Cartan basis. The results of the application of the program to a series of inhomogeneous (cosmological as well as noncosmological) space-times are given: in particular, the constraints, the Dirac Hamiltonian and the canonical equations are explicitly written for axisymmetric space-times, constituting the starting point for the study of the dynamics and of the canonical quantization of these configurations. 相似文献
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密立根油滴实验数据的计算机处理 总被引:1,自引:0,他引:1
本文主要给出了利用VB编制的处理密立根油滴实验数据的程序,解决了数据处理的复杂计算的问题,利用该程序软件处理测定的电子电量值与标称值符合得较好,使该实验可以作为综合实验安排. 相似文献
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A free data analysis program for Mössbauer spectroscopy was developed to solve commonly faced problems such as simultaneous fitting of multiple data sets, Maximum Entropy Method and a proper error estimation. The program is written in C++ using the Qt application framework and the Gnu Scientific Library. Moessfit makes use of multithreading to reasonably apply the multi core CPU capacities of modern PC. The whole fit is specified in a text input file issued to simplify work flow for the user and provide a simple start in the Mössbauer data analysis for beginners. However, the possibility to define arbitrary parameter dependencies and distributions as well as relaxation spectra makes Moessfit interesting for advanced user as well. 相似文献
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An efficient computer program has been developed to deconvolute thermoluminescence (TL) glow peaks and optically stimulated (OSL) curves by employing a method of the interactive trap model (ITM). The program is designed to be used easily on the MS Windows-based computer with a graphical user interface. This program could be used to analyze the TL glow curves by using the traditional first-order kinetics (1OK), second-order kinetics (2OK), general order kinetics (GOK), mixed order kinetics (MOK) and the general approximation (GA) method as well as ITM. The program was tested with the generated data and the experimental results of deconvoluted TL glow curves of LiF TLD-100 by assigning five interacting traps and one recombination center. A complete version with full functionalities of this program can be downloaded from the web site http://physica.gnu.ac.kr/TLanal. 相似文献
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G. Odyniec 《Physics of Atomic Nuclei》2012,75(5):602-606
The Beam Energy Scan (BES) program at RHIC was launched with the specific aim to explore the QCD (Quantum Chromodynamics) Phase Diagram. Particular emphasis was given to the search for phase boundaries and the location of the Critical Point (CP). The first run with AuAu collisions at 7.7, 11.5, and 39 GeV took place in 2010, and the next one, with energies of 18 and 27 GeV, will start in a few months. The results of the first stage of the BES program obtained by the STAR (Solenoidal Tracker at RHIC) experiment are presented and discussed, as well as plans for the future of the program. 相似文献
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根据爆炸焊接理论,综合分析了相关爆炸焊接参数的计算方法,利用Visual C++语言编制了爆炸焊接参数计算机辅助设计程序,该程序采用菜单和视图形式对输入、输出命令结果进行操作,方便直观。与有关实验结果的对比表明,计算所给出的焊接窗口及最佳焊接参数具有很高的准确度。爆炸焊接CAD方法对于减少实验次数,摆脱经验设计方法,选择最佳焊接参数将是非常有用的工具。 相似文献
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Possa D Gaudio AC Freitas JC 《Journal of magnetic resonance (San Diego, Calif. : 1997)》2011,209(2):250-260
A numerical simulation program able to simulate nuclear quadrupole resonance (NQR) as well as nuclear magnetic resonance (NMR) experiments is presented, written using the Mathematica package, aiming especially applications in quantum computing. The program makes use of the interaction picture to compute the effect of the relevant nuclear spin interactions, without any assumption about the relative size of each interaction. This makes the program flexible and versatile, being useful in a wide range of experimental situations, going from NQR (at zero or under small applied magnetic field) to high-field NMR experiments. Some conditions specifically required for quantum computing applications are implemented in the program, such as the possibility of use of elliptically polarized radiofrequency and the inclusion of first- and second-order terms in the average Hamiltonian expansion. A number of examples dealing with simple NQR and quadrupole-perturbed NMR experiments are presented, along with the proposal of experiments to create quantum pseudopure states and logic gates using NQR. The program and the various application examples are freely available through the link http://www.profanderson.net/files/nmr_nqr.php. 相似文献