盐湖沉积储层孔隙结构特征及演化模式--以马王庙油田为例

盐湖沉积条件下的沉积环境及储集层特征等具有与淡水沉积不同的特征,通过对江汉盐湖盆地马王庙地区储层孔隙结构特征的研究,揭示了孔隙结构的宏观及微观特征.该区新沟咀组下段砂岩储层孔隙类型以粒间溶孔为主,喉道主要为片状、弯片状及点状喉道.Ⅱ、Ⅲ油组的物性比Ⅰ油组好,平面上孔隙分布具分区性.孔喉配置主要为大孔中喉,次为大孔粗喉及中孔中喉.孔隙结构受沉积环境及成岩作用的影响.以马36井Ⅱ油组砂岩为例,建立了孔隙演化定量模式.     

Crack length measurements with a potential drop method: A finite element simulation

A potential drop method, as used for estimations of crack lengths during three-point-beind experiments, is studied. The mechanical state is calculated using a finite element method. The deformed body obtained is used for a subsequent calculation of the electrostatic state. Calculations are performed for both two- and three-dimensional models. The material is assumed to be elastic, linearly hardening plastic and electrostatically linear. Large deformations are considered. Further, the non-linearity caused by the load, depending on the contact area between the cylinder on which the load is applied and the specimen, is considered. The increased contact area did not influence the mechanical state very much but had a direct impact on the electrostatic state. The changes in the potential drop recordings due to deformation and electrical current passing through the load cylinder were shown to be considerable. The study explains, at least partly, the experimental observations. A more reliable registration of crack growth initiation is the main outcome of the analysis.     

Optically tuned superconductive-dielectric resonators with whispering-gallery modes

An analytical method is presented for calculating the resonant frequency andQ-factor of a superconducting dielectric disk resonator operating in millimeter-wave regime with whispering-gallery mode. Resonant frequency shift due to the optical generation of quasi-particles in superconducting film is investigated as a function of photon flux. An optically tunable resonant frequency of about 500 MHz is estimated, and good agreement is found between numerical results and experimental ones.     

溶质原子在再结晶运动晶界上偏聚的研究

Ｂ~（１０）（ｎ，α）Ｌｉ~７裂变反应的径迹显微照相技术被用来研究含硼Ｆｅ－３０％Ｎｉ合金高温热变形再结晶过程中硼在晶界上的偏聚行为，实验表明，含硼Ｆｅ－３０％Ｎｉ合金１０００℃热变形２０％再结晶过程中，运动晶界前方发生硼偏聚而后方发生贫硼现象，而在静止晶界上看不到硼偏聚，随着再结晶新晶粒的长大，运动晶界上的硼偏聚变弱。本文提出，可以用晶界对溶质原子热运动散射的量子理论来解释溶质原子在运动晶界上的偏聚现象。     

SAPO-34/SiO_2催化甲醇制烯烃

采用水热法合成了SAPO-34分子筛,并用X射线粉末衍射仪和扫描电子显微镜对SAPO-34分子筛的结构进行了表征,同时探讨了黏合剂种类、甲醇分压、催化剂粒径和硅源等对SAPO-34分子筛催化甲醇制烯烃(MTO)反应性能的影响。实验结果表明,在MTO反应中,三烯(乙烯、丙烯和丁烯)选择性在反应初期存在明显的诱导期;以S iO2为黏合剂合成的SAPO-34/S iO2催化剂不但可缩短MTO反应的诱导期,三烯选择性也较未添加黏合剂或以A l2O3为黏合剂时高1~2个百分点;且当催化剂活性明显下降时,三烯选择性下降的幅度较小。催化剂粒径、甲醇分压及硅源对催化剂的诱导期也有明显的作用。在甲醇分压低于19kPa、催化剂粒径0.25~0.38mm、S iO2为黏合剂、硅酸四乙酯为硅源时,SAPO-34/S iO2催化剂的MTO性能明显提高。     

Modeling lossy anisotropic dielectric waveguides with the method oflines

This paper presents a new formulation useful for modeling waveguides constructed from lossy inhomogeneous anisotropic media. Our approach is based on a pair of Sturm-Liouville type wave equations that have been derived to handle inhomogeneous, diagonalized complex permittivity and permeability tensors. The method of lines is then applied to these wave equations, and related field equations, creating an indirect eigenvalue problem that correctly models this class of structure. Some refinements to the method of lines are also proposed, particularly, regarding the construction of the modal matrices found in the eigenvalue problem. Using our approach, modal dispersion curves have been computed for millimeter-wave and optical structures. Comparisons made with results available from the literature validate our approach     

用HPLC法测定对二异丙苯的一氢过氧化物和二氢过氧化物

二过氧化氢对二异丙苯是二异丙苯氧化法生产对苯二酚的重要中间产物。本文用HPLC半制备柱制得一过氧化氢对二异丙苯和二过氧化氢对二异丙苯纯品,用光谱法确定其结构,建立了正相高效液相色谱测定方法。     

Cyanex有机膦类萃取剂在贵金属溶剂萃取中的研究和应用

介绍了近年来Cyanex有机膦类萃取剂在贵金属溶剂萃取中的研究状况及应用进展，展望了该类萃取剂在贵金属分离提取中的应用前景。     

乙烯直接氧化合成乙酸

用常规固定床反应器考察了Pd-SiW12/SiO2催化剂还原条件对乙烯直接氧化合成乙酸催化性能的影响。催化剂用H2在200－300℃还原后Pd 的分散度较高，其催化活性远高于肼在液相中还原的催化剂，在乙烯气相氧化合成乙酸反应的原料气中，适量1，2－二氯乙烷的存在有助于提高乙酸的选择性和时空产率，初步考察了Pd-Se-SiW12/SiO2催化剂连续206h运转的稳定性，结果表明，催化剂中Pd晶粒的长大和硅钨酸的流失是造成催化剂失活的主要原因。     

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.