查询词典 method

The practical problems in the granulometric analysis method—the water sedimentation analysis method and the dry sieve analysis method,are analyzed,and an improved water sieve analysis method is developed in this paper.

文章分析了目前粘性土颗粒分析的主要方法——静水沉降法和干筛法，指出其存在的问题。

We made a comparison of using laser method and comprehensive method(pipette analysis-sieve analysis)to do grain size analysis for 65 sediment samples from the South Yellow Sea area.The analysis result from the laser method is very close to that from the sieve method.

本文主要通过实验研究，对南黄海沉积物用激光粒度分析仪和沉降法、筛析法取得的测试结果作对比研究，探讨激光粒度分析结果在该海域应用的可靠性。1粒度分析方法的基本原理1.1综合法通常联合使用筛析法和沉析法叫综合法。

We analyze the advantage of the simple iterative method over Newton method at last. The numerical examples show that the more computational time has saved by the simple iterative method than the Newton method.

最后分析了简单迭代和牛顿迭代的优劣对比，数值算例表明在同样精度下简单迭代更节约计算时间。

In this thesis, the methods for solving eigenvalue problems and conventional reanalysis methods are studied firstly. Then, a new reanalysis method for real modal reanalysis of structures subjected to topological modification with added degrees of freedom is presented. This method is composed of the single step perturbation method and the Rayleigh-quotient iteration. The numerical examples show that this reanalysis method is very effective and high-quality.

本文首先在对常规的特征值数值求解方法和重分析方法研究的基础上，针对实模态的自由度增加的结构拓扑修改重分析，提出了一种新方法，该方法由于结合了单步摄动法和瑞利商逆迭代法两者的优点，应当是一种比较理想的重分析方法，算例的数值结果也有力的验证了该方法确实是一种高精度、十分有效的实模态重分析方法。

Make a summary of geological bodies surface modeling methods,which including singular value surface compose method, inner bodies grid peel off surface method and the reconstruction method based on the outward curve of geological bodies,in addtion, the heuristic extend surface method.

将地质体表面建模方法总结归纳分为组合单值曲面法、体内剖分剥离表面法和基于外轮廓线的重构法，并提出有启发式的展铺法。

In this thesis, I summarize the theoretical calculation method, applied scope and notice of siphonic drainage system, and point out the advantage of siphonic drainage system compared with gravitation drainage system. In the archetype experiment study of siphonic drainage tube, I adopt different tube diameter and different structural height to survey the drainage volume and press in different place. I observe various kinds of flow state, and get chief factors which influence hydraulic peculiarity of system as the tube diameter or structural height, and find out the relevance of factor to flux. I apply CFD Fluent software and adopt standard k-ε model and RNG k-ε model, then use finite volume method and second-order upwind scheme to discrete numerical model, while coupling numeration of velocity field and press is based on SIMPLE. In the numerical simulation of curved part of tube, siphonic drainage tube experiment system and multi-outlet siphonic drainage system, I make research on internal velocity and press of system in different project condition by changing the tube diameter of curved part, negative press value in tube export and improving the quantity of water gutter. This thesis first adopts a method of combining archetype experiment and numerical simulation to study the siphonic drainage system, test and verify the validity of experiment and numerical simulation, and makefurther study on system, it solves the problems of limited testing conditions, and has a logical results, it can provide a valid method for optimizing and designing the drainage tube-net system. The conclusion have referring value for study and design of siphonic drainage system.

本文首先对虹吸式排水系统理论计算方法、适用范围以及注意事项做出总结，并分析了虹吸式排水系统的优势；再对虹吸式排水管道进行原型试验研究，采用不同管径不同立管高度，对系统流量、管道压强进行量测，观察了各种工况下的流态，对其水力特性进行研究分析，找出影响水力特性的落差、管径主要因素以及与排水量的关系；进一步应用计算流体力学Fluent软件，采用标准κ-ε模型与RNGκ-ε模型，计算过程应用有限体积法和二阶迎风格式对数值模型进行离散，速度和压力的耦合采用SIMPLE算法，分别对系统弯管段、虹吸排水管道试验系统、多斗虹吸式排水系统进行数值模拟分析，通过改变管段弯头处半径、管段出口负压值、增加雨水斗数对不同工况下系统内部的速度和压力进行研究；本文首次采用结合原型试验与数值模拟相结合的方法，对虹吸式屋面雨水排水系统进行研究，试验与模拟相互验证，并进行拓展，很好地解决了虹吸式屋面雨水排水系统由于试验条件限制问题，结果正确合理，为排水管网系统设计和优化研究提供了有效的方法，对工程设计有较好的参考价值。

Basic Study on Erection Planning Method for Beam String Structure 2,Study on Structural Characteristic of Hybrid Skeleton with Tension Strings 3, Proposal of Reversed Progress Teclmique for Tension Structures and Its Application 4,Mechanical Behavior of Hybrid Skeleton with Tension String during Construction 5,Experimental Studies on Structurel Characteristic of Hybrid Skeleton with Tension Strings 6,Mechanical analysis of a type hybrid spatiaI structure composed of cables,bars and beams 7, Tensile force compensation analysis method and application in construction for hybrid structures 8,Tensile forces emulationaI analysis of prestressed cables for multistage tension construction method 9,Reverse analysis method of construction centrel tensile force for prestressed space structures

1 ，基础研究规划方法架设张弦梁结构 2 ，结构特征研究混合骨架张力弦 3 ，建议反进展Teclmique张力结构及其应用 4 ，力学性能的混合骨架张力字符串施工 5 ，实验研究Structurel特征混合骨架张力弦 6 ，机械分析型杂交spatiaI结构组成的电缆，酒吧和梁 7 ，张力补偿的分析方法及应用在建筑混合结构 8 ，拉伸部队emulationaI分析的多级预应力锚索张拉施工方法 9 ，逆向分析方法的建设centrel张力的预应力空间结构

Objective To establish a simple,accurate and practi cal method of extracting plasmid from gram-negative and gram-positive bacteria ,Method we selected,Biswajit sahas method and comported others method, such as controlling pH andtemperature strictly and increasing EDTA-Na2 capacity.

为建立一种革兰氏阴性及阳性菌均能分析的质粒提取方法，以Biswajit saha的方法为基础，对比酸酚法、热变性法、碱变性法、酶法等方法，研制符合国内一般实验室的方法。

By introducing the nonlinear complementarity problem function, the Karush-Kuhn-Tucker conditions of OPF model are transformed equivalently into a set of semismooth nonlinear algebraic equations. Then the set of semismooth equations can be solved by a semismooth L-M method based on the subdifferential. The method belongs to Newton-type method. It can ensure the positive defmitiveness of the iterative coefficient matrix by using the L-M parameter, which avoids the ill-conditioning of iterative equations. The method, requiring only the approximate solution of a linear system at each iteration, is quite applicable to the large-scale cases.

在利用非线性互补函数将OPF模型的KKT条件转化为半光滑非线性代数方程组后，采用基于次微分的半光滑L-M法求解，该方法属于牛顿法范畴，可通过对L-M参数的调整保证迭代系数矩阵的正定性，克服了系数矩阵的奇异引起的"病态"，且该方法在确定搜索方向时只需求解线性系统的加热器近似解，适用于大规模系统的求解。

In order to improve performances of computer communication networks, the important route selection optimization in computer communication networks is firstly studied in detail by using the modern metaheuristic search method, i. e., Tabu search, which is of great flexibility and came into use just a few years ago. Better results are obtained and compared with the traditional Lagrangean relaxation and subgradient optimization method. Especially, the superiority of this method over other algorithms is further shown in the case of very heavily loaded network. Thus, the new thinking and method are provided for the optimization theory of computer networks.

摘 要：为了改进计算机通信网络的性能，首次采用近年来才开始应用、且具有很强灵活性的现代超启发式搜索方法——Tabu搜索方法，对计算机通信网络中重要的路由选择优化问题进行了详细的研究，得到了比经典的拉格朗日松弛及子梯度优化方法更优的结果，尤其在网络负荷很重的情况下，与其它算法相比，更显示出该方法的优越性，从而为计算机网络的优化理论提供了新的思路和方法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。