聚氧乙烯烷基酚醚羧甲基钠盐的提纯及表面活性

用硝酸银作沉淀剂，采用沉淀法提纯了标称氧乙烯（ＥＯ）数分别为２和４的聚氧乙烯烷基酚醚羧甲基钠盐，纯度在９９．８％以上。测定了不同温度和离子强度下的表面张力，由热力学关系计算出其表面性质和胶团化及表面吸附过程的标准热力学函数。结果表明，标称ＥＯ数由２增至４时，分子的最小截面积增加，反离子结合度减小，表面张力降低能力则下降很小。加入氯化钠，可使表面活性分子的最小截面积明显减小，却对表面张力降低能力影响     

卤代烃对唑化合物荧光猝灭机理

测试了１×１０－５ｍｏｌ／Ｌ５，５－二苯基－２，２－联唑（ＰＯＯＰ）、反－１，２－双［２－（５－苯基唑基）］乙烯（ＰＯＥＯＰ）、４，４－双［２－（５－苯基唑基）］－１，１－联苯（ＰＯＢＯＰ）在含不同浓度卤代烃的１，４－二氧六环溶液中的荧光量子产率，讨论了荧光猝灭机理，计算出ＣＨ３Ｉ、ＰｈＩ、ＰｈＢｒ对ＰＯＥＯＰ、ＰＯＯＰ、ＰＯＢＯＰ的荧光猝灭速率常数．研究发现，卤代烃分子越小，卤原子核电荷数越高，其猝灭荧光能力越强     

正丁醇在稀水溶液表面上吸附的热力学研究

在300．2-308．2K温度区间内，用表面张力仪测定了正丁醇稀水溶液的表面张力随其浓度的变化．应用热力学方程计算体系的表面过剩熵，表面过剩焓，及Gibbs吸附量和正丁醇分子的平均截面积．同时讨论了正丁醇与表面活性剂(十六烷基三甲基溴化铵，CTAB)相互作用的热力学原理，并希望能为助表面活性剂的选择、使用提供理论依据．     

COM燃料用稳定剂对其流动性的影响

讨论了多元醇与环氧丙烷（ＰＯ）及环氧乙烷（ＥＯ）共聚物的支链数、支链的分子量、ＰＯ与ＥＯ的摩尔比、分子间的交联对ＣＯＭ燃料流动性的影响。当稳定剂分子的支链子均分子量在 ５ ０００以上、 ＰＯ与 ＥＯ的摩尔比接近２、分子链间进行适当交联,支链数目又较多时,ＣＯＭ燃料的流动性较好。三聚氰胺六羟甲基在ｐＨ为４．５时缩合１０ｍｉｎ,与ＰＯ及ＥＯ加成后再加入２倍于它的摩尔数的 ＴＤＩ进行交联,用它配制的 ＣＯＭ的含碳量最高可达６６％。     

Fe^2＋还原废畜电池泥渣中PbO2的试验研究

讨论了ＰｂＯ２还原过程的热力学问题，并对ＦｅＳＯ４＋Ｈ２ＳＯ４还原转化剂处理蓄电池泥渣中ＰｂＯ２及Ｐｂ过程进行了试验研究。热力学分析及试验结果表明。本研究的还原剂将ＰｂＯ２和Ｐｂ还原转化为ＰｂＳＯ４的热力学推动力大，反应速度快，工艺过程稳定以及Ｐｂ回收率高。     

Fe￣（2＋）还原废蓄电池泥渣中PbO＿2的试验研究

讨论了ＰｂＯ＿２还原过程的热力学问题，并对ＦｅＳＯ＿４＋Ｈ＿２ＳＯ＿４还原转化剂处理废蓄电池泥渣中ＰｂＯ＿２及Ｐｂ过程进行了试验研究，热力学分析及试验结果表明：本研究的还原剂将ＰｂＯ＿２和Ｐｂ还原转化为ＰｂＳＯ＿４的热力学推动力大，反应速度快，工艺过程稳定以及Ｐｂ回收率高。     

EMD在Pb—Ag—Ca新型合金阳极上竞争反应的研究

Ｏ２在变质Ｐｂ－Ａｇ－Ｃａ阳极（ＰＡＣ阳极）分别在２０％Ｈ２ＳＯ４及／Ｍｏｌ／Ｌ ＭｎＳＯ４－２０％Ｈ２ＳＯ４体系中过电位ηＯ２测定的结果（２９８Ｋ）及热力学的计算，讨论承ＰＡＣ阳极上的两个主要竞争反应即ＭｎＯ２（ＥＭＤ）电沉积及Ｏ２的析了在不同条件下的变迁。     

Gd（NO3）3／Er（NO3）3—Gly—H2O三元体系的研究（25℃）

测定了Ｇｄ（ＮＯ３）３／Ｅｒ（ＮＯ３）３－Ｇｌｙ－Ｈ２Ｏ三元体系在２５℃时的溶度和饱和溶液折光率。各体系的溶度和饱和溶液折光率曲线均由４支组成，分别与ＲＥ（ＮＯ３）３；ｎＨ２Ｏ配合物ＲＥ（Ｇｌｙ）２（ＮＯ３）３．２Ｈ２Ｏ，ＲＥ（Ｇｌｙ）４（ＮＯ３）３；Ｈ２Ｏ及Ｇｌｙ相对应。     

三草酸根合铁（Ⅲ）酸钾磁化率的测定

报道了用古埃（Ｇｏｕｙ）磁天平法测定Ｋ＿２［Ｆｅ（Ｃ＿２Ｏ＿４Ｏ＿４）＿３］３Ｈ＿２Ｏ摩尔磁化率，磁场强度Ｈ用ＣＴ５型特斯拉计直接测量或由已知单位质量磁化率的莫尔盐（ＮＨ＿４）＿２ＳＯ＿４，·ＦｅＳＯ＿４·６Ｈ＿２Ｏ间接标定，根据测得的摩尔磁化率Ｘ＿Ｍ，求出配合物分子的磁矩Ｕ＿ｍ和未成对电子数，推断Ｋ＿３［Ｆｅ（Ｃ＿２Ｏ＿４）＿３］·３Ｈ＿２Ｏ的配位键类型。     

RE（NO3）3—Ala—H2O三元体系在25℃时的半微量相平衡研究

测定了ＲＥ（ＮＯ３）３－Ａｌａ－Ｈ２Ｏ（ＲＥ＝Ｓｍ，Ｇｄ，Ｅｒ）三元体系在２５℃时的溶解度和饱和溶液折光率，绘制了相应的溶解度图与饱和溶液折光率曲线。各体系的溶解度曲线与折光率曲线均由４支组成分别与ＲＥ（ＮＯ３）３．ｎＨ２Ｏ（ＲＥ＝Ｓｍ，Ｇｄ，ｎ＝６；ＲＥ＝Ｅｒ，ｎ＝５），ＲＥ（Ａｌａ）（ＮＯ３）３．Ｈ２Ｏ，ＲＥ（Ａｌａ）４（ＮＯ３）３．Ｈ２Ｏ和Ａｌａ的晶体相对应。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to