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Is the national Ministry of Construction of aluminum window and door profile sentinel production enterprises, the main products are various series of sliding sash body, industry profiles, GE Profile feed tube profiles, 100,130 series, such as curtain walls .

广东华昌铝厂有限公司是国家建设部铝门窗型材定点生产企业，主要产品有各种体系列的推拉窗，工业型材，通用型材管料型材、100、130玻璃幕墙系列等。

In this dissertation the"Penalty"finite element method was employed to compute the velocity of the three-dimensional flow of power-law fluid in a profile die. In order to decrease the needed computer memory and raise the stability of numerical simulation, a set of decoupled methods such as PFEM, pseudo-body force method and transformation of momentum equation to the elliptic equation was developed to establish the general finite element equations to compute the distributions of velocity and viscoelastic stress of the three-dimensional viscoelastic flow of the Phan ThienTanner fluid in a profile die. During numerical simulation of the extrudate swell of the PTT fluid, the flow in the die and out of the die was analyzed separately, which demands less computer memory.

本文建立了求解挤出口模内幂律流体流动速度场的通用三维罚有限元模型；对于非线性粘弹性的Phan Thien-Tanner流体，为了降低模拟计算对计算机硬件的要求，并使模拟计算更加稳定，采用了一种去耦算法，包括罚有限元方法、拟体力方法和动量方程的椭圆类方程转化方法，并建立了求解速度场和粘弹性应力场的总体有限元方程；对于PTT流体的挤出胀大问题，提出了挤出胀大熔体口模内外分离模拟法，这样可以显著降低数值模拟对计算机硬件的要求。

In this dissertation the"Penalty"finite element method was employed to compute the velocity of the three-dimensional flow of power-law fluid in a profile die. In order to decrease the needed computer memory and raise the stability of numerical simulation, a set of decoupled methods such as PFEM, pseudo-body force method and transformation of momentum equation to the elliptic equation was developed to establish the general finite element equations to compute the distributions of velocity and viscoelastic stress of the three-dimensional viscoelastic flow of the Phan ThienTanner fluid in a profile die. During numerical simulation of the extrudate swell of the PTT fluid, the flow in the die and out of the die was analyzed separately, which demands less computer memory. The key techniques used in numerical simulation of the three-dimensional extrusion from dies such as decision of boundary conditions, creation of initial velocity field, selection of penalty factor, high Weissenberg number problem , regeneration of the free surface were studied in detail.

中文题名聚合物异型材口模挤出三维流动研究副题名外文题名 Study on three-dimensional flow of polymer melts during the process of profile extrusion from dies 论文作者涂志刚导师柳和生包忠诩教授学科专业材料加工工程研究领域\研究方向学位级别博士学位授予单位南昌大学学位授予日期2001 论文页码总数148页关键词挤出成型聚合物材料挤出口模聚合物异型材馆藏号BSLW /2003 /TQ320 /9 本文建立了求解挤出口模内幂律流体流动速度场的通用三维罚有限元模型；对于非线性粘弹性的Phan Thien-Tanner流体，为了降低模拟计算对计算机硬件的要求，并使模拟计算更加稳定，采用了一种去耦算法，包括罚有限元方法、拟体力方法和动量方程的椭圆类方程转化方法，并建立了求解速度场和粘弹性应力场的总体有限元方程；对于PTT流体的挤出胀大问题，提出了挤出胀大熔体口模内外分离模拟法，这样可以显著降低数值模拟对计算机硬件的要求。

By numerical integral of this model, the factors which affect the additional twist of yarn are analyzed, including the pressure in the profile tube, the coefficient of friction between the fiber band and lattice apron, the length of the suction slot and the curvature radius of profile tube.

通过对集聚区内须条的集聚过程分析，建立须条的受力模型，发现须条在集聚过程中会产生附加捻度，并且对影响须条附加捻度的各种因素：异型管开槽长度、负压大小、须条和网格套圈间的摩擦因数以及异型管的曲率半径进行了分析。

It proves that; The grass-covered soil profile in depression is formed by accumulation, and the 137 Cs concentration variation with the depth of the profile reflects the information of sediment accumulation and surface soil erosion.

研究结果表明：(1)草地洼地土壤剖面属于堆积土壤剖面，土壤剖面中137Cs浓度分布特征反映了泥沙堆积与表层土壤侵蚀的信息。

The processes which include the automatic recognition and extraction of the profile for a hot forging, the calculation of the tonnage and center of hammer blow, the choice of flash, and profile of flash land and magazine etc.

用程序实现了热锻件外轮廓的自动识别和提取、设备吨位和打击中心计算、飞边选择、自动加飞边桥部和仓部等全部过程，其结果得到了工程技术人员的认可。

Firstly, according to the analysis of the forming principle of the involutes profile and the tooth thickness of formula, a mathematical model of involutes profile was established.

首先，根据对渐开线齿廓形成原理和渐开线齿轮任意圆上的齿厚公式的分析，建立了插齿刀的渐开线圆柱齿轮齿廓的数学模型。

A comparatively complete layout chart is built by using small shot interval and receiver spacing in Tianjin-Beijing-Chicheng Deep Seismic Sounding profile. Based on the DSS data of the profile, the crustal structure and the tectonic coupling are studied in the rift-depression basin of eastern North China and Yanshan uplift.

天津—北京—赤城深地震测深剖面采用密集炮点和接收点距设计构成了较为完整的观测系统，利用该剖面地震测深资料研究华北东部裂陷盆地与燕山隆起地壳结构及构造耦合。

On the basis of analyzing and calculating transverse tooth profile for geometry, the symmetry line and tip arc of transverse tooth profile for a teeth of gear were defined and it also be drawed out.

由于渐开线圆柱齿轮的端面齿廓为渐开线，而且轮齿的厚度与齿轮的模数相关，所以用AutoCAD建立渐开线圆柱齿轮的三维模型十分困难。

Throats are so easily blocked up for clay in rocks that the permeability decreases and the output is affected. The problem can be mostly worked out by inputting clay inhibitor into formations. Production well loggings, such as well logging of output profile, well logging of injection profile with five parameters, engineering well logging, were gained research in Hailaer oil field in this paper.

海拉尔油田是低渗透且具有断块性质的新开发油田，本文提出在对海拉尔油田开发进行地球物理监测时需要解决一系列关联的钻井地质工程问题，诸如岩石中富含粘土成分容易引起地层微粒堵塞喉道、孔道，从而导致渗透率下降现象，直接影响采油井产量。

Connectors are lines that can be anchored to particular places, called glue points , on the graphic object.

连接符，可固定在图形对象的特定的地方的线条。

Another way of putting it, too many agents have a say in each other's work, and bureaucratic rigor mortis sets in.

另一种表达是，太多的作用物在彼此的工作里都有话语权，官僚的僵尸开始抬头。