查询词典 sampling methods

We design the parallel methods of Krylov Subspace Methods and the PPAT-precontioned Krylov Subspace Methods, implement them on YH-3 supercomputer, analyze their scalabilities on YH-3 supercomputer.

我们设计了Krylov子空间方法以及PPAT预条件Krylov子空间方法的并行算法，在YH-3上进行了性能测试，并分析了它们在YH-3上的可扩展性。

First it concludes elementary methods for product modeling such as feature recognition, feature-based design and feature mapping. Then it probes into the mechanism of constraint-based feature parametric modeling, representation of feature parametric model and methods for solving constraint in details. At the end it proposes a feature-based modeling system that makes good use of resources and synthesizes many feature modeling methods, and analyses the development of prototype system oriented to actual application.

首先全面归纳了基本的基于特征的产品建模方法，包括特征识别、基于特征设计和特征映射方法，然后对基于约束的特征参数化建模、特征参数化模型的表达和定义方法以及约束求解方法进行了深入研究，最后提出了一个充分利用现有资源，特征识别、基于特征设计和特征映射共用的特征建模系统，并探讨了面向实际应用的原型系统的开发技术。

The methods of constructing phylogenetic trees include the distance2based methods , parsimony , maximum likelihood , and Bayesian inference methods.

构建系统树的方法有距离法、简约法、最大似然法以及贝叶斯推断法等。

In studing methods,partial func-tional differential equations sum up the theories and methods of ordinary differentialequations,partial differential equations,the semigroup theory and the fixed-pointtheory in functional analysis and the basic concepts,theories and methods suit-able for the partial differential equations with delay are formed.

偏泛函微分方程在研究方法上综合了常微分方程的理论方法和泛函分析中算子半群、不动点理论以及偏微分方程的理论方法，并形成了以时滞为基本特征的泛函微分方程的基本概念、理论和方法。

Network analyzers provide a method for measurement of frequency translating devices and these methods are more accurate and can save more time. According the principles of scalar network analyzer and vector network analyzer the authors introduced methods to measure conversion loss of frequency translating devices using scalar network analyzer and methods to measure conversion loss and phase using vector network analyzer.

摘 要：网络分析仪为测量变频器件提供了快速而准确的测量方法，根据标量网络分析仪和矢量网络分析仪的测量原理，详细介绍了用标网测量变频器变频损耗的方法，以及用矢网测量变频损耗和相位的方法。

We prove the strong con-vergence of the methods, that is, if the methods do not terminate in finite iterations,then every limit point of the sequence generated by the methods is a stationary pointof the primal problem.

本论文证明了所给算法具有强收敛性，即若算法不是有限步终止，则算法产生的迭代序列的所有极限点都是原问题的稳定点。

Proceeding from the above purpose and thinking, the following of research contents is launched that: Chapter one is a part of the prolegomena, and mainly introduce the purpose, meaning, research background, documents survey in which the tax compliance discrimination models concerned. On the basis of the investigation of the critical to taxation, Chapter two reveals the index system, and uses the discriminating analytical method to judge taxpayers" credit, and embodies its standard and methods in judgments. On the disvovery of the investigating taxpayers" microeconomics behavior, Chapter three uses the econometrical modeling methods and data mining technology, establishes Logistic regression model, calculates taxpayer credit measure and gives the empirical analysis; Chapter four gives a work methods and suggestions in practical application of identifying models; It is a conclusion of this paper, which reaffirms the main achievements and viewpoints of this paper.

从以上目的和思路出发，本文研究内容如下方式展开：论文第一章为绪论部分，主要介绍纳税人诚信识别模型研究的目的、意义、研究背景、文献综述以及全文框架；第二章在纳税评估问卷调查基础上，提出纳税评估指标体系，并应用多元统计的判别分析方法来给出评判纳税人诚信，并具体给出其判断的标准与方法；第三章在考察纳税人微观行为基础上采用计量经济建模方法和数据挖掘技术，建立定量能测算纳税人诚信水平的Logistic回归模型，并作实证分析：第四章对比分析纳税评估模型实证研究结果，并就模型在实际应用中的工作方法、建议及进一步的研究方向展开讨论；最后为本文的结论，在该部分将再次重申本文研究的主要成果和观点。

The advantages and limitations of every kind of methods for calculating the failure probability is reviewed. The frist order reliability method, the second order reliability method and many kinds of boundary method have achieved remarkable success and formed nature fields of reliability. However, the precision of these methods decrease as the increase of complexity of problem. The numrical methods are versatile, except numerical intergration is only adaptable to special problems which have small number variables and regular intergral domain. Particularly, the advanced variance reduction techniques own the following character: high precision and a small amount computation. But some questions remain to study in the future because only an initial work about these techniqes is developed.

全面评述了计算失效概率各种方法的优点和局限性，其中经典的解析法包括一次可靠性方法、二次可靠性方法、一阶边界法、Vanmarcke上边界、PENT上边界和Ditlevsen二阶窄边界法，这些方法对于多设计点、变量较多且相关、密度函数不是正态以及极限状态方程较复杂的情况，其计算精度较差；而已有的数值方法却是具有较好的通用性，其中除数值积分法只对变量较少、积分域较规则的特殊问题适用外，各种数值模拟方法均具有较广的适应性，特别是各种改进的方差减小技术，精度高、计算量小，但由于其处在研究的初级阶段，还有许多问题有待于解决。

The management of an enterprise shall, on the basis of the integrated employment of information in areas such as manufacturing, purchase and sale, investment, fund-raising, and finance, carry out analysis of its operations on a regular basis by way of factor analysis methods, comparison analysis methods, trend analysis methods or by any other means and shall find out the reasons for any issue discovered and make corresponding corrections.

第三十四条运营分析控制要求企业建立运营情况分析制度，经理层应当综合运用生产、购销、投资、筹资、财务等方面的信息，通过因素分析、对比分析，趋势分析等方法，定期开展运营情况分析，发现存在的问题，及时查明原因并加以改进。

In this thesis, the methods of surrounding rock masses stability classification on the basis of the geological documentation of muck and the boring parameters of TBM are approached, especially as follows:①The geological documentation of muck and the boring parameters of TBM in the Yellow River Diversion Project.of shanxi province is summarized systematically;②Based on the geological documentation of muck and the boring parameters of TBM, that whether the common methods of surrounding rock masses stability (the methods of regular factor classification) classification are feasible, is carried on the discussion;③According to the corresponding relation of muck and the boring parameters of TBM and the surrounding rock masses stability type, the extension assessment method of tunnel surrounding rock masses stability classification is set up, also the corresponding fortran calculation procedure worked out, and not only rational result in conformity with the reality can be obtained, but also the stability situation of surrounding rock masses in front of the working range can be predicted according to the change of the dependent value in the application instance of Yellow River Diversion Project;④Combining with the application instance of Yellow River Diversion Project, extension assessment method in the application of surrounding rock masses stability classification is compared and verificated in detail by applying fuzzy synthesis method by forefathers, and a certain degree discussion and summary about the application achievement of surrounding rock masses stability classification, which is assessed by extension assessment method and fuzzy synthesis method, are carried on.

本文基于渣料和TBM掘进参数的地质编录提供的地质信息进行了围岩稳定分类方法的探讨，重点进行：①对引黄工程中渣料和TBM掘进参数的地质编录的系统整理；②基于渣料和TBM掘进参数的地质编录获得的地质信息，对常用围岩稳定分类方法是否能够进行围岩稳定分类进行了探讨；③根据渣料和TBM掘进参数与围岩稳定类型的对应关系，应用可拓理论，建立了隧洞围岩稳定分类的可拓评价方法，还编制了相应的fortran计算程序，并在引黄工程的应用实例中不仅取得了与客观实际相符的合理结果，而且根据其关联度值的变化能够预测临近掌子面前方围岩的稳定情况；④结合引黄工程的应用实例运用模糊综合评判方法对可拓评判方法在围岩稳定分类中的应用进行了详细的验证、比较，并对前人在运用可拓学和模糊数学进行岩体稳定评判的应用成果方面，进行了一定的探讨、总结。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。