稀土杂多化合物Ba4[Ce(Ⅳ)W10O33]·24H2O制备及纳米化

以TritonX-100/n-C10H21OH/H2O体系W/O微乳液为基础,分别以K8[Ce(Ⅳ)W10O33]·32H2O和Ba(NO3)2水溶液代替组分水制备W/O微乳液.然后将两种微乳液混和,得到淡黄色沉淀的Ba4[Ce(Ⅳ)W10O32]·24H2O纳米粒子.经电镜分析所得Ba4[Ce(Ⅳ)W10O33]·24H2O纳米粒子为粒径6 nm的圆球状颗粒.并用TG-DTA和Raman对该化合物进行了袁征.     

反相微乳液中LaPO4纳米粒子的制备

利用了反相微乳液中界面膜的限定作用，在TritonX—100／n—C10H21OH／H2O体系的反相微乳液中以0．1mol/L(NO3)3和0．1mol/L(NH4)3PO3水溶液代替组分水合成了LaPO4纳米粒子．使用透射电子显微镜(TEM)和x衍射仪(xRD)对其形貌和大小分别进行了表征．     

油包水型微乳液法合成负载Pt催化剂及其评价

以碳酸铵和硝酸铝为原料，分别在由十六烷基三甲基溴化铵(CTAB)、正丁醇、环己烷和水构成的微乳液体系和由十二烷基苯磺酸钠(DBS)、正丁醇、环己烷和水构成的微乳液体系中合成了一定粒径的γ-Al2O3纳米粒子．然后在γ-Al2O3纳米粒子上负载Pt和CeO2形成了Pt／CeO2／Al2O3催化剂．用BET，TEM，XRD，XPS和FT-IR对催化剂进行了分析．结果表明催化剂的粒径随着水与表面活性剂的摩尔比Rw的增大而减少．当催化剂粒径为16nm时，催化剂对NO的还原活性最好．     

纳米氧化锌的微乳液法制备及表征

纳米ZnO可用于毛织物的后整理，使织物具有抗菌除臭、消毒、抗紫外线的功能．采用TritonX-100／正庚醇／正辛烷／盐水微乳液体系，以一定盐浓度的硝酸锌（Zn（NO3）2）水溶液（A）与碳酸钠（Na2CO3）水溶液（B），通过两个乳液混合的方法，制备出氧化锌超细微粒．并用差热分析（DTA）、透射电镜（TEM）和X射线衍射仪对其进行表征分析．实验表明，30℃时，以A型微乳液与B型微乳液通过乳液混合搅拌的反应方式制备出纳米ZnO微粒的前驱体，经80℃真空干、燥约5h后，在350℃下煅烧2h，得到了平均粒径约为10nm的超细ZnO粉末，且微粒粒径分布均匀、团聚少，多数为球状颗粒．     

纳米四水羟基硝酸氧铋的制备及在氮气气氛下的热分解动力学

利用反相微乳液法制备出了纳米四水羟基硝酸氧铋[Bi6O4(OH)4](NO3)6(H2O)4,并以热分析为手段对纳米[Bi6O4(OH)4](NO3)6(H 2O)4的热分解过程和非等温热分解动力学机理进行了研究.动力学研究确定了[Bi6O4(OH)4](NO3)6(H2O)4脱硝酸根反应属于球对称的三维扩散的D3机理,热分解表观活化能为E=98.90033 kJ/mol,lnA=27.13109.     

制备纳米Fe2O3的微乳体系研究

通过测定不同油水比的电导率变化，研究了甲苯（MB）／十二烷基硫酸钠（SDS）/正丁醇（1-B），三氯化铁溶液（FeCl3）微乳体系的形成及影响体系稳定性的因素。实验表明：当MB和H2O总质量一定．SDS质量不变，正丁醇／甲苯=0．3时，水油体积比（Vw/Vo）小于0．6形成油包水（W／O）型微乳液，当Vw/Vo在1．3附近形成水包油（O／W）型微乳液。表面活性剂的种类，pH值，盐值影响微乳体系的稳定性。     

CTAB～n-C4H9OH/c-C6H12/H2O体系W/O微乳液稳定性研究

CTAB～n-C4H9OH／c-C6H12／H2O体系微乳液的相组成和性质进行研究。结果表明，当CTAB与n-C4H9OH质量比为2：3时，具有较宽范围的W／O微乳液相区域，且该微乳液体系对温度变化不敏感。当pH≥2时，有较强的pH值稳定性，并探讨了液晶相出现的原因。     

阳离子表面活性剂/正丁醇/正癸烷/水体系的相行为研究

绘制了C12NBr／正丁醇／正癸烷／水的拟三元体系相图．确定了它们区域边界范围，用电导法测定了微乳液区域内微乳液结构的变化过程．在液晶区域内选取一系列样品点，用^2HNMR和差示扫描量热法(DSC)与液晶纹理相互补充和对照，研究了该体系的液晶结构特点．结果表明：在恒定温度下，随含水量增加，体系的液晶相结构发生如下变化，从层状→层状与六角状液晶共存→层状、六角状与立方状液晶共存→立方状液晶→微乳液．当组成固定时，体系的液晶相结构随温度的变化也发生变化．     

微乳液法合成纳米二氧化硅粒子

制备Triton X—100／正辛醇／环己烷／水(或氨水)微乳液，研究了该微乳液系统稳定相行为与制备条件的关系．在该微乳液系统稳定的条件下，由正硅酸乙酯受控水解反应制各SiO2纳米粒子，反应后处理简便，制得粒子尺度较均一的球形疏松无定型纳米SiO2粒子．SiO2粒子粒径尺寸可通过调节水与表面活度剂分子数之比m、水与正硅酸乙酯分子数之比n控制．探讨了影响SiO2纳米粒子形貌、粒径分布的因素及制备优化条件．     

水/OP-正已醇/环已烷微乳液性能及Fe3O4粒子制备

利用水／OP-正已醇／环已烷微乳液作为反相胶束微反应器，通过调节微反应器中的溶水量，制备微米级的Fe2O4，并考察水／OP-正已醇／环已烷微乳液的性能。结果得到，微乳液法制备Fe2O4的最佳工艺条件为：表面活性剂OP与助表面活性剂环已醇之比为3：2，水相为Fe^2 ：Fe^3 =2：1的水溶液，乳化温度为30℃。该微乳液法制备Fe2O4的工艺设备简单，制得的粒子粒径较小，且可以通过调节溶水量来改变微液滴反应场的大小，进而控制产物微粒的大小，是制备性能良好Fe3O4微粒较好的体系。     

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…     

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。     

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     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

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.     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.