超小孔径树枝状介孔二氧化硅纳米球的制备和表征

采用短碳链的表面活性剂溴代十二烷基三甲基溴化铵为模板剂,合成了具有较大粒径和超小孔径分布的单分散树枝状介孔二氧化硅纳米球(记为DMSNs-C12).通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射能谱(XRD)、傅里叶变换红外光谱(FT-IR)、以及氮气吸附脱附曲线对制备的DMSNs-C12进行了形貌、晶体结构、化学组成、孔体积、比表面积等分析.结果表明:与传统的、以溴代十六烷基三甲基溴化铵为模板剂制备的单分散树枝状二氧化硅纳米球相比(DMSNs-C16),DMSNs-C12颗粒尺寸明显增大,褶皱结构消失,孔道尺寸急剧减小.原因是随着碳链减小,表面活性剂相互斥力减弱,影响微乳液形成,最终导致结构差异.     

NUMERICAL SIMULATION OF OIL MIGRATION-ACCUMULATION OF MULTILAYER AND ITS APPLICATION

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｏｉｌｆｏｒｍａｔｉｏｎｉｎｓｅｄｉｍｅｎｔｂａｓｉｎｓ ,ｉｔｓｄｉｓｐｌａｃｅｍｅｎｔ,ｔｒａｎｓｐｏｒｔａｎｄａｃｃｕｍｕｌａｔｉｏｎ ,ａｎｄｔｈｅｆｉｎａｌｆｏｒｍａｔｉｏｎｏｆｏｉｌｄｅｐｏｓｉｔｓｈａｖｅｂｅｅｎｏｎｅｏｆｔｈｅｋｅｙｐｒｏｂｌｅｍｓｉｎｔｈｅｅｘｐｌｏｒａｔｉｏｎｏｆｏｉｌ＿ｇａｓｒｅｓｏｕｒｃｅｓ.Ｈｏｗｈａｓｏｉｌｂｅｅｎａｃｃｕｍｕｌａｔｅｄｉｎｔｈｅｐｒｅｓｅｎｔｌｏｏｐａｃｃｏｒｄｉｎｇｔｏｔｈｅｍｅｃｈａｎｉｃｓｏｆｉｍｍｉｓｃ…     

压力对燃料滴燃烧速度的影响

实际燃烧装置的喷雾炬内,燃料滴的直径约为几十到几百微米.目前积累的大量有关液滴燃烧的实验资料,大多是用悬挂滴法与多孔球法获得的,所用液滴直径为一到十几毫米,比实际喷雾中的滴径大的多.因而,燃烧过程中自然对流的影响较大,而化学动力学因素的影响较小.研究压力对燃料滴燃烧速度的影响,可以用改变环境介质压力的办法,在宽广的数     

NUMERICAL METHOD AND APPLICATION FOR THREEDIMENSIONAL NONLINEAR SYSTEM OF DYNAMICS OF FLUIDS IN POROUS MEDIA

For the system of multilayer dynamics of fluids in porous media, the second order upwind finite difference fractional steps schemes applicable to parallel arithmetic are put forward. Some techniques, such as calculus of variations, energy method, multiplicative commutation rule of difference operators, decomposition of high order difference operators and prior estimates are adopted. Optimal order estimates are derived to determine the error in the second order approximate solution. These methods have already been applied to the numerical simulation of migration-accumulation of oil resources.     

Careful numerical simulation and analysis of migration-accumulation of Tanhai Region

Numerical simulation of careful parallel arithmetic of oil resources migration-accumulation of Tanhai Region (three-layer) was done. Careful parallel operator splitting-up implicit iterative scheme, parallel arithmetic program, parallel arithmetic information and alternating-direction mesh subdivision were put forward.Parallel arithmetic and analysis of different CPU combinations were done. This numerical simulation test and the actual conditions are basically coincident. The convergence estimation of the model problem has successfully solved the difficult problem in the fields of permeation fluid mechanics, computational mathematics and petroleum geology.     

Parallel arithmetic numerical simulation and application of secondary migration-accumulation of oil resources

From such actual conditions as the effects of characteristics of miltilayer petroleum geology and permeation fluid mechanics, a new numerical model is put forward and coupling splitting-up implicit interactive scheme is formed. For the actual situation of Dongying hollow ( four-layer ) and Tanhai region ( three-layer ) of Shengli Petroleum Field, the numerical simulation test results and the actual conditions are coincident.     

多层油资源运移聚集的数值模拟和实际应用

研究了三维问题的石油地质和渗流力学特征。提出了数学模型,构造了新的算子分裂隐式迭代格式,并成功地对胜利油田东营凹陷(厚层)和惠民凹陷(多层)带断层和通道的实际问题进行了大规的数值模拟计算。计算结果在油藏位置等方面和实际情况相吻合,完整地解决了这一石油地质和渗流力学的国际着名问题。     

Numerical simulation analysis for migration-accumulation of oil and water

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油水运移聚集数值模拟和分析

油资源的运移聚集数值模拟是描述在盆地发育中油水运移聚集演化的历史,它对于油田的勘探和合理开发有着重要的价值.本文提出问题的数学模型和修正交替方向隐式迭式格式.对于着名的二次运移聚集的水动力学实验(剖面和平面问题),进行了数值模拟,模拟结果和实验结果是完全吻合的.     

非溶剂致相分离法制备PVDF膜影响因素探究

非溶剂致相分离法作为制备聚偏氟乙烯（PVDF）膜一种常用的方法已得到广泛推广,但因影响其成膜因素诸多,至今没有一种较好的协同效果．作者介绍了不同溶剂、聚合物的浓度、添加剂的种类和浓度、凝胶浴的组成和温度、蒸发时间及后处理等制膜条件对膜的影响,以期为优化制膜工艺提供参考．