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Search Results: 1 - 10 of 97327 matches for " 顾明 "
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Burgers方程的交替分组迭代法
Alternating Group Iterative Methods for Burgers Equations
 [PDF]

陈宁,
Pure Mathematics (PM) , 2014, DOI: 10.12677/PM.2014.44019
Abstract:
给出了Burgers方程的一种新的交替分组显式迭代方法,并用线性化方法分析了其稳定性和收敛性,给出了模型问题的数值结果,并在数值例子中对于精确解和数值解做出了比较,验证了该方法的稳定性和收敛性。
Alternating group explicit iterative methods for Burgers problems are given. The stability and convergence are analyzed by the linear method. Numerical results of the model problem are given. And the comparison of exact and numerical solutions is made to verify the stability and the con-vergence of the method.
层次分析法在图书馆绩效考核中的应用
The Application of AHP in the Library Performance Evaluation
 [PDF]

, 郭蒙蒙
Operations Research and Fuzziology (ORF) , 2011, DOI: 10.12677/orf.2011.11005
Abstract:
当代图书馆的管理水平主要体现在图书馆人力资源的绩效考核问题上,一个科学合理的绩效考核方法可以促进图书馆的进步和发展。传统的绩效考核方法过于主观片面,无法达到客观公正的要求,引发许多不必要的问题。本文基于层次分析法建立了图书馆绩效考核评价体系,运用数学建模的方法量化考核指标和考核结果,以清晰明确的数字代替模棱两可的语言评价,克服了传统考核中的缺陷,并配以实例进行分析,全面的比较每位职员的各个方面的特长和缺陷,使考核不仅能对过去工作做出公正合理的总结判定,也能为以后的工作发展提供全面的参照和指导,力求为图书馆绩效考核提供一个科学、公正、合理的方法。
Nowadays, the performance evaluation of human resources in libraries has manifested the contemporary library management level. A scientific and reasonable evaluation method can prompt the progress and development of library. However, the traditional method is too subjective and can not reach the fair or objective requirements. It results in lots of unnecessary problems. Based on AHP, this paper builds the evalu-ation system of evaluation which uses mathematics model to quantify the target and result of evaluation. It applies clear numbers instead of vague language evaluation. It overcomes the drawbacks of traditional me-thod and matches examples to analyze. It can compare the advantages and disadvantages of each member in every aspect in the whole. So it not only makes fair and reasonable summary and judge of evaluation about the past work, but also provides overall consult and guidance for the future development. It makes great effort to offer a scientific, fair and reasonable method for performance evaluation.
一类非线性反应扩散方程的隐–显多步有限元方法
Implicit-Explicit Multistep Finite Element Methods for Some Nonlinear Reaction-Diffusion Equations
 [PDF]

, 郭蒙蒙
Pure Mathematics (PM) , 2012, DOI: 10.12677/pm.2012.21006
Abstract: 隐–显多步有限元方法是近年来提出的一种方法,主要用于非线性抛物问题。我们对一类非线性反应扩散方程的初边值问题进行近似,给出了隐–显多步有限元方法的逼近格式,并证明了该格式的最优阶误差估计。
Implicit-explicit multistep methods were recently proposed, and mainly used to nonlinearparabolicequa- tions. We approximate the solution of initial boundary value problems for some nonlinear reaction-diffusion Equations, and discretize by Implicit-Explicit Multistep finite element methods. The optimal order error esti- mates is derived in this paper.
一维对流扩散方程的新交替分段显隐格式
A New Alternating Segment Explicit-Implicit Scheme for One Dimensional Convection-Diffusion Equation
 [PDF]

, 刘倩
Pure Mathematics (PM) , 2013, DOI: 10.12677/PM.2013.36054
Abstract:
对一维对流扩散方程给出了一组新的交替分段显隐格式,并证明了格式无条件稳定。它可以用于并行算法且精度\"\"可以达到阶。数值实验表明,此格式具有精度高,收敛快的特点。
A new alternating segment explicit-implicit scheme for convection-diffusion equation was given and this scheme was proved to be unconditionally stable. This scheme can be used in parallel computation and the spatial accuracy rate is\"\" . A numerical experiment shows that this scheme has high accuracy and quick ratio of convergence.
构件类的语法描述及构件关系的语义描述

计算机科学 , 2003,
Abstract: In this paper,sameness and difference of component class and component,class and object are compared.Syntax of component class is described using BNF paradigm.After some definitions are given,semantics of component inherit and reference relationship are described.
构件类的语法描述及构件关系的语义描述

计算机科学 , 2003,
Abstract: inthispaper,samenessanddifferenceofcomponentclassandcomponent,classandobjectarecompared.syntaxofcomponentclassisdescribedusingbnfparadigm.aftersomedefinitionsaregiven,semanticsofcomponentinheritandreferencerelationshipared
数据挖掘技术在图书馆流通服务中的应用
Application of Data Mining Technology in Library Circulation Services
 [PDF]

张丽霞,
Hans Journal of Data Mining (HJDM) , 2012, DOI: 10.12677/HJDM.2012.23006
Abstract: 本文根据经典Apriori算法思想编写了数据挖掘程序,并利用此挖掘程序对经过预处理后的数据进行了挖掘。在挖掘过程中为保证获得的关联规则真实、可靠,对同一组数据采用了不同的支持度计算方法,不同的数据细化粒度多次运行,结合详细的读者借阅信息对获得的关联规则进行综合分析,发现了一些有价值的关联关系。将获得的关联关系用于指导图书馆的流通服务工作,不断开拓流通服务工作的深度和广度,逐步提高读者满意度。
The data mining program based on the classic Apriori algorithm was designed in this paper. It has gone through the pretreatment data mining by using this mining program to mine those data. In order to make the obtained association rules true, reliable, adopting supporting calculation methods on the same set of data used in the mining process, multiplying the runs of different granularity of data refinement combined with detailed Readers information on the association rules and obtaining comprehensive analysis, finding some valuable relationships between them. Using the obtained association relations to guide the library circulation service, constantly opening up the depth and breadth of circulation and service work, gradually increasing readers’ satisfaction toward our work.
解Burgers方程的分裂型最小二乘混合元方法
Two Splitting Least-Squares Mixed Element Methods For Burgers Equations
 [PDF]

, 曲慧宁
Pure Mathematics (PM) , 2011, DOI: 10.12677/pm.2011.11005
Abstract: 本文对Burgers方程提出了Euler型分裂的最小二乘混合元格式,该格式最大的优点是将耦合的方程组系统分裂成为两个独立的子系统进行求解,从而在很大程度上降低了原问题的求解难度和规模,并通过引入适当的最小二乘泛函,得到原未知量的最优阶L2(Ω) 模误差估计。
Two splitting least-squares mixed element methods are proposed to simulate Burgers equation in this paper. The advantage of this methods is that the coupled system can be split into two independent sub-systems and then reduce the difficulty and scale of primal problems. Theoerical analysis shows that the methods yield the approximate solutions for the primal problems with optimal accuracy in L2(Ω) norm.
基于r个最大次序统计量模型的极值风压估算
,
力学学报 , 2010, DOI: 10.6052/0459-1879-2010-6-lxxb2009-700
Abstract: 提出一种基于r个最大次序统计量(rlargestorderstatistics,r-LOS)模型的极值风压估算方法,该模型包括广义极值(generalizedextremevaluedistribution,GEV)联合分布形式及Gumbel联合分布形式.提出了独立风压峰值r-LOS序列构造方法、最优r值确定方法、r-LOSGEV模型和r-LOSGumbel模型的优选方法.将r-LOS模型方法应用于某低矮工业建筑刚性模型测压试验的极值风压估算.当采用多段风压时程估算极值风压时,r-LOSGumbel模型优于r-LOSGEV模型和经典Gumbel模型.当采用单段风压时程时,与基于改进Hermite模型的峰值因子法、Sadek-Simiu法相比,r-LOSGumbel模型方法能更加精确地估算极值风压,适用于非高斯风压的极值估算,可以给出极值风压分位点的解析解.分析表明,r-LOSGumbel模型方法是一种多段时程和单段时程条件下均适用的极值风压估算方法.
chi-square统计技术在信息系统异常检测中的应用
,
计算机应用 , 2006,
Abstract: ?描述了chi-square统计技术的原理,设计了实现该技术的算法,并用visualc++6.0编程环境实现。为了验证原理和算法的有效性,对unix和windowsxp两个系统中的数据进行了采样实验和比较,结果表明:如果以入侵情节为基本单位,本文算法能有效降低误报率和提高检测率。
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