流动

The UV and MS qualitative analysis of the eluates in different eluting time showed that the aromatics were basically separated by the Ag-SCX column according to the number of aromatics rings.

实验发现，流动相中的水含量直接影响Ag-SCX柱的活性，严格控制流动相中的含水量可将色谱柱的活性稳定在一定水平，失活后的色谱柱经1：1的苯／四氢呋喃冲洗几个小时后即可恢复其活性。

Mmol/L benzoic acid was used as eluent. The effect of benzoic acid concentration, pH value on the retention time was studied.

实验过程中，对流动相组成，流动相pH值变化对各种有机酸保留时间的影响作了详细的探讨。

Separation effect and retention time of organic acids could be improved byreducing pH values of the eluent and column temperature.

降低流动相的pH，可有效抑制有机酸分子的解离，延长保留时间，提高有机酸的分离效果，但流动相的pH不应低于2.0，否则会导致色谱柱填料的水解，损坏色谱柱。

The mechanical behavior of ERF flowing in two parallel plane electrodes gap was studied and calculated numerically.

对ERF流体在极板间的流动规律进行了理论分析，并采用计算流体力学方法，对其在极板间的流动规律进行了计算机数字仿真的分析研究。

Calculation and analysis the effects of primary flow parameters and structure parameters such as fliter volocity of flow,diameter of ceramic particle,void fraction of ceramic,section shape of ceramic filter element on filter efficiency and pressure drop of regid candle ceramic filter element in this paper.

计算和分析了渗流流速以及陶瓷颗粒直径、孔隙率、陶瓷过滤元件截面形状等主要流动参数与结构参数对于刚性烛状陶瓷过滤器过滤效率和过滤流动的压力降等特性的影响。

Flow characteristics of DIP and related flotation efficiencies were investigated in a flotation deinking cell where an aeration system with pressurized air supply was installed.

对脱墨浆在主动进气式浮选脱墨槽中的流动特性及不同流动状态时的脱墨效果进行了研究。

Very little has been published on the optimum flow rate for particular materials and even if this were known the relationship between optimum flow rate and gate width would probably be complex because of the large number of variables involved.

在特定材料的流动速率优化方面，已经发表的文献很少，并且即使已知优化流动速率和浇口宽度之间的关系，也会由于包含很多变量而使得情况变得复杂。

Some babies like a faster flow nipple when others prefer a slow flow nipple.

一些婴儿一样，更快的流动乳头时，其他人则倾向于缓慢流动的乳头。

The second, according to mapping function of blank and product sections, and to many interpolating functions along model-cavity vertical surface, paper has built mathematics model, fluid surface function of special-shaped product plastic deformation and velocity field, gotten basis theory for metal forming prediction, for example empty drawing metal pipe thickness homogeneity and special-shaped product fluid regular, die parameter optimization and integration research of die CAD/CAM.

根据拔制坯料和制品截面映射函数和模腔纵向多种插值函数（直线型、凸型、凹型和三次多项式型），建立了相似异型材、圆形坯料——异型材和异型材——异型材三维金属拔制塑性成形的数学模型和异型材塑性成形的流面方程及流动场方程，为预报金属成形规律（如：空拔管壁均化、异型材流动规律），模腔参数优化及其CAD／CAM一体化研究提供了理论基础。

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。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。