流

The main objective of this dissertation was to develop methodologies with capability of engineering application for simulating flow in fractured rock using discontinuum models. The study work includes three parts. In the first part, numerical methodology of three-dimensional discrete fracture network model casing on hybrid BEM-channel was presented, and the technique for improve the model's computing efficiency was also studied. Firstly in this part, computer simulation methodology based on the Baechermodel for generating network of discrete fractures was presented, which includes the follow details: probability distributions of fracture density,orientation, trace length, size, and aperture and estimation of their statistical parameters; stochastic models of fracture network; Monte-Carlo's simulation method; numerical simulation procedure and technicality.

给出了离散裂隙网络模型所依据的基本假定；发展了基于Baecher模型的离散裂隙网络计算机随机生成技术：详细地推导了单裂隙渗流和多裂隙相交网络渗流的边界单元法公式，发展了离散裂隙网络中稳态渗流的边界元数值技术，并且讨论了相关的具体数值技术细节，如角点的处理方法，单元的自动剖分等：描述了混合边界元—管流模拟方法及其数值实现；研究了裂隙网络的简化方法，并针对裂隙网络边界元法的特点提出了一种改进的分块三角分解法。

It is found that loop-carried flow dependencies form a set of disjoint linear ordered sets, and that there is one and only one basis that is independent and inclusive, making unnecessary all the other dependencies.

利用这一性质，围绕着包含这一概念，该文为VLIW结构上的流相关分析提出了一个完整的娄学模型，发现体间流相关集合可划分为若干不相交的线序集合，存在且仅存在一个独立的、全包含的流相关集合，使其他所有流相关都不必要。

The paper systemetically investigates the hydrolic properties of the level swirling inner dissipator and the factors which influence on it by model test on the one hand, on the numerical simulation hand, the paper has simulated the swirling flow field in the level discharge tunnel with Anisotropic k-ε Turbulence Model by programming, in addition with Second-moment Renolds Stress Model by utilizing CFX software.

本文一方面通过模型试验的方法系统地研究了水平旋流内消能工流场的水力特性和影响因素；另一方面选取各向异性的K-ε模型和雷诺应力模型，分别用编程的方式和利用CFX软件数值模拟水平旋流泄洪洞内流场。

First Zhen Wen rough sketch from three generations of Spring andAutumn and Warring States, Han, Tang and Northern Dynasties to the evolutionprocess, including the rheological items, style, dissuasive between the main objectof the rheological and stylistic development, from the internal laws of inspection,and political,literary trends and the times of writing, the personal creation of therheological Zhen wen; then summary of zhen wen's the general concept and style,and its classification According to discourage targeting divided into private andofficial Zhen.

首先粗略勾勒箴文从三代、春秋战国、两汉、南北朝到唐的流变过程，这个流变包括篇目、体式、劝诫主客体之间的流变，并从文体发展的内部规律考察原因，政治兴衰、文学思潮、时代文风、个人创造都促进了箴文的流变；总结箴文的概念和一般的体式，并对其进行分类，根据劝诫对象的不同分为官箴和私箴。

This paper referred to simulating the supersonic double cone inlet" s flow field of ramjet pill assisted range projectiles at a variety of working circumstances, pressure contours, density contours and Mach number contours of inlet" s flow field were given When cone combination, relative location of cone core and cowl lip, the pressure of outlet, inflow Mach number and angle were changed, flow field and performance parameters of inlet can be affected. Simultaneity, productive mechanism and inducing factors of the inlet surge were also discussed. Then the best working conditions and the best model of inlet were obtained.

本文对冲压增程弹丸所用发动机的双锥超声速进气道在各种工况条件下的流场进行了数值模拟，给出了进气道流场的等压线图、等密度线图和等马赫线图，从而观察在不同的锥尖角组合、锥芯与外罩唇口的相对位置、出口反压、来流马赫数和攻角时，对进气道流场及性能参数的影响，并探讨喘振现象的产生机理及诱导因素，以便确定最佳的工作状态，得到最优的进气道模型。

Secondly, based on above results, the radiation stress flow and the mass transport velocity composed by Eulerian velocity and Stokes drift are computed.

并以此波浪场为输入条件，分别计算了由欧拉流和Stokes流组成的质量输移流以及辐射应力流。

What this paper finished mainly work as follows: Five-phase hybrid step motor driver system with fixed-chopping frequency and constant total current driving is fully described. Mathematical model of the system, included the current control circuit, power driving circuit and five-phase hybrid stepping motor is established. The steady modeling of the system is established and studied. Based on the steady modeling of the system, dynamic modeling of the system is studied and single step response characteristic is constructed with MATLAB/Simulink. The simulation results, which is certified by the theory analysis, coincide with the theory analysis.

本文主要完成的工作包括几个方面：对五相混合式步进电动机恒频斩波恒总流驱动系统进行了完整的描述；建立了包括电流控制电路、功率驱动电路以及五相混合式步进电动机在内的恒频斩波恒总流驱动系统的完整的数学模型；基于MATLAB/Simulink建立了恒频斩波恒总流驱动系统稳态仿真模型，并进行了仿真；在建立其稳态仿真模型的基础上，对动态模型进行研究，并借助于MATLAB/Simulink工具建立了恒频斩波恒总流驱动系统单步响应特性的仿真模型并对其单步响应特性进行了仿真研究，仿真结果与理论分析相符。

On the basis of dual porosity theory,the well test interpretation model which considers the variation of krg versus the volume of liquid is also established and resolved by the implicit method numerically.

摘要通过分析凝析气藏的相图，建立了凝析液饱和度随压力降的变化规律，并回归得出了相应的公式；同时通过对气体压缩因子、黏度随压力、温度的变化，建立了这些参数和无因次压力的关系；在双重介质地层假设的基础上，建立了在试井过程中凝析气相对渗透率随凝析液饱和度变化的凝析气藏试井解释数学模型，采用隐式迭代的方法进行了求解并进行了参数敏感性分析；结果表明：凝析液的饱和度对凝析气藏试井的压力及压力导数曲线有着很大的影响，早期由于凝析液的析出，阻碍了气藏的流动，导致压力及压力导数曲线上升；在凝析液饱和度达到峰值之后，随着凝析液的挥发，凝析气的相对渗透率逐渐恢复，压力及压力导数曲线又回归到正常的径向流位置；由于裂缝和基岩之间的压力差，使得裂缝弹性储容比在测试过程中发生变化，进而影响了压力及压力导数；窜流系数和裂缝弹性储容比的变化决定了窜流段发生的早晚和程度；而基岩中气体黏度的变化使得窜流的发生稍微滞后。

Optimized calculation shows that, the comprehensive performance of the eddying tube is better than that of the smooth tube, and the comprehensive performance of the eddying tube with minor screw pitch and proper groove depth is excellent.

优化计算表明，旋流管换热系统的传热-阻力综合性能指标优于光滑管换热系统，旋流管的螺距、槽深对旋流管换热系统的传热、压降、功率消耗等影响很大，但是小螺距、适当槽深的旋流管的综合性能是优良的。

We are discussing impact business card printing and membership card making ink film SAGs and leveling-and-effect relationship, its esta and leveling.

我们在讨论影响制卡和会员卡制作图文墨膜的流挂与流平因果关系中，已就其流挂与流平进行了分析。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了