喇8-182井区聚合物驱不可及孔隙体积研究

喇嘛甸油田喇8-182井区高Ⅱ1-18油层渗透率低、物性差,属于三类油层,是聚合物驱的主力接替潜力层。文中在油层性质对比分析的基础上,应用计算法和数值模拟方法研究了高Ⅱ1-18油层的聚合物驱不可及孔隙体积并进行了对比。研究结果表明,计算法简单易行,成本低,能够充分考虑分子量、矿化度等的影响;但这种方法只考虑了由于孔隙直径过小而导致的不可及孔隙体积,无法表达由于压力梯度不足而造成的不可及孔隙体积,因此计算结果偏小,只适合于分子量的初步优选。数值模拟方法充分考虑了启动压力梯度和压力场的影响,计算结果更加符合实际情况,适合于在已经初步选定分子量范围的情况下,模拟不可及孔隙体积。不可及孔隙体积随注入速度增加而减小,高Ⅱ1-18油层不可及孔隙体积在0.2～0.3之间。最后建议喇8-182井区聚合物驱注入速度控制在0.2PV/a以内。     

浅谈原油顺序输送过程中混油量的计算

针对原油顺序输送工艺的特点,分析了原油顺序输送产生混油量的原因,给出了混油量计算公式。指出混油的形成与输送距离、油品种类、输量、停输时间、地形等有关。举例对东黄复线顺序输送所产生的混油量进行分析计算,给出了顺序输送过程中减少混油量的措施。     

VHF-PECVD制备微晶硅材料的均匀性及其结构特性的分析

采用VHF-PECVD技术在多功能系统(cluster tool)中制备了系列硅薄膜，研究薄膜的均匀性及电学特性和结构特性。结果表明：气压和功率的合理匹配对薄膜的均匀性有很大的影响；材料的喇曼测试和电学测试结果表明微晶硅薄膜存在着纵向的结构不均匀，在将材料应用于器件上时，必须要考虑优化合适的工艺条件；硅烷浓度大，相应制备薄膜的晶化程度减弱，即薄膜中非晶成分增多。     

Continued fraction for formal laurent series and the lattice structure of sequences

Besides equidistribution properties and statistical independence the lattice profile, a generalized version of Marsaglia's lattice test, provides another quality measure for pseudorandom sequences over a (finite) field. It turned out that the lattice profile is closely related with the linear complexity profile. In this article we give a survey of several features of the linear complexity profile and the lattice profile, and we utilize relationships to completely describe the lattice profile of a sequence over a finite field in terms of the continued fraction expansion of its generating function. Finally we describe and construct sequences with a certain lattice profile, and introduce a further complexity measure.     

泡沫铝的声频内耗

研究了泡沫Ａｌ的声频内耗，结果表明：泡沫Ａｌ的内耗值比普通Ａｌ大一个量级以上，且随测量频率的增加而减小。出现了正常振幅效应。用平面波动方程，推导了泡沫Ａｌ的内耗与频率，孔隙率和孔径的关系，较好地解释了实验结果。     

A method for quantifying cell size from differential interference contrast images: validation and application to osmotically stressed chondrocytes

An automatic image analysis method was developed to determine the shape and size of spheroidal cells from a time series of differential interference contrast (DIC) images. The program incorporates an edge detection algorithm and dynamic programming for edge linking. To assess the accuracy and working range of the method, results from DIC images of different focal planes and resolutions were compared to confocal images in which the cell membrane was fluorescently labelled. The results indicate that a 1‐µm focal drift from the in‐focus plane can lead to an overestimation of cell volume up to 14.1%, mostly due to shadowing effects of DIC microscopy. DIC images allow for accurate measurements when the focal plane lies in a zone slightly above the centre of a spherical cell. In this range the method performs with 1.9% overall volume error without taking into account the error introduced by the representation of the cell as a sphere. As a test case, the method was applied to quantify volume changes due to acute changes of osmotic stress.     

克拉玛依原油中各组分的乳化性质

用沉淀法和色谱分离法将克拉玛依原油分离成沥青质，极性物和抽余油三组分，红外光谱分析表明，沥青质和极性物中存在一些含氧官能团的羧酸类或酚类以及含氮化合物，而抽余油则主要为烃类物质，因而沥青质和极性物的界面活性大于抽余油，沥青质具有较强的油包水（W／O）乳化能力，是造成克拉玛依原油W／O乳化的主要组分，极性物具有较强的水包油（O／W）乳化能力，是造成克拉玛依原油O／W乳化的主要组分，抽余油的乳化能力很弱。     

稀土永磁及磁记录材料的矫顽力与有效激活体积

指出了文献 [1]中的一个错误。给出了不同模型的稀土永磁材料以及磁记录材料的矫顽力 Hc和有效激活体积υ之间的正确关系 ,这样的关系被表示成一个复杂的函数关系 ,同时指出 ,对不同模型的稀土磁性材料 ,这个函数关系是不同的     

Ray-cast volume rendering accelerated by incremental trilinear interpolation and cell templates

Two related ideas for improving the speed of ray-cast volume rendering are studied in this paper. The first is an incremental algorithm for trilinear interpolation, a method commonly used in ray-cast volume rendering to calculate sample values. The incremental algorithm can expedite trilinear interpolation when many samples along a ray are located in one cell. The second is an efficient hybrid volume rendering restricted to parallel projection. In the preprocessing stage, acell template is created to store the information used by the incremental trilinear interpolation. When a cell is parallel projected, the information is retrieved from the template to compute the cell contribution. Because the algorithm with only one template may cause aliasing, an antialiasing technique exploiting multiple cell templates is proposed. With our method, ray-cast volume rendering can be accelerated considerably.     

火箭燃气射流对斜板冲击流场的数值模拟

采用高精度，高分辨率的二阶ＴＶＤ有限体积方法，对二维无粘射流冲击斜板的复杂流动场进行了数值模拟，得到了和实验规律相一致的计算结果。