苯乙烯对丙酮肟和N，N－二甲基甲酰胺~1HNMR谱溶剂效应的研究

该文在四氯化碳介质中考察了苯乙烯对丙酮肟和Ｎ，Ｎ－二甲基甲酰胺（ＤＭＦ）１ＨＮＭＲ谱的溶剂效应，观察到丙酮肟、ＤＭＦ和苯乙烯的化学位移随苯乙烯的摩尔分数增加而逐渐移向高场，丙酮肟和ＤＭＦ分子中的两个甲基向高场移动的程度不同，而且两个甲基和苯乙烯分子中的苯基的化学位移与混合溶剂中苯乙烯的摩尔分数呈线性关系．     

N,N—二甲基甲酰胺与甲苯相互作用的~1H NMR研究

本文测定了N,N—二甲基甲酰胺(DMF)在甲苯和四氯化碳混合溶剂申随甲苯摩尔分数变化的~1H NMR谱,观察到N,N—二甲基甲酰胺(DMF)分子中的两个甲基和混合溶剂中的甲苯共振吸收峰的化学位移随甲苯摩尔分数增加而逐渐移向高场,而且两个甲基向高场移动的程度不同。发现如果苯环上的氢被甲基取代,DMF分子中的甲基和溶剂分子中的苯基向高场移动的幅度递减,得到了所有化学位移与混合溶剂中甲苯的摩尔分数呈线性关系。     

新型手性衍生化试剂MTPEA^13C NMR的研究

本文通过质子宽带去耦（ＰＢＢＤ）和质子偏共振去耦（ＰＯＲＤ）核磁共振技术；研究了新型手性衍生化试剂２－甲氧基－２－三氟甲基－２－苯基－乙胺（ＭＴＰＥＡ）分子中＾１３Ｃ－＾１Ｈ、＾１３Ｃ－＾１２Ｆ间的耦合作用。在此基础上，报导了ＭＴＰＥＡ分子中各基团的化学位移和＾１３Ｃ－＾１９Ｆ间的一级、二级耦合常数（＾１Ｊ和＾２Ｊ）。     

二乙酰一肟与苯相互作用的~1H核磁共振研究

研究二乙酰一肟在四氯化碳和苯混合溶剂中的１ＨＮＭＲ，观察到二乙酰一肟分子中两个甲基和混合溶剂中苯的共振吸收峰的化学位移随苯的摩尔分数增加而逐渐移向高场，而且两个甲基共振吸收峰向高场移动的程度不同，α甲基的Δδ值较β甲基的Δδ值为大。α甲基和混合溶剂中苯的化学位移与苯的摩尔分数呈线性关系，可用方程δ＝Ａｘ＋Ｂ表示，式中ｘ是混合溶剂中苯的摩尔分数，相关系数Ｒ接近于－１。     

分子动力学模拟研究温度对甲醇缔合体系中氢键和弱氢键作用的影响

利用分子动力学模拟方法研究了不同温度下甲醇缔合体系中氢键与弱氢键的缔合情况．通过模拟与核磁共振实验数据研究表明：（1）强氢键的缔合度与羟基的质子位移变化趋势一致,羟基质子的化学位移直接受缔合度的影响;（2）强氢键在低温下起着主要的作用,致使甲基质子位移处于高场,随着温度升高,强氢键很快减少;（3）在高温下弱氢键对溶液结构慢慢占据主要地位,它的作用是使得甲基质子移向低场,其数目同样随着温度升高而减少,但受温度的影响远小于强氢键。     

1—[5—（3—吡啶）—四唑—2—乙酰基]—4—芳基氨基硫脲及…

本文测定１－［５－（３－吡啶）－四唑－２－乙酰基］－４－芳基氨基硫脲及３－［５－（３－吡啶）－四唑－２－亚甲基］－４－芳基－１，２，４－三唑－５－硫酮等六种化合物的＾１３Ｃ－ＮＭＲ谱。各种＾１３Ｃ－ＮＭＲ化学位移，根据取代基效应，讯号强度以及同模型化合物化学位移对照而确认其归属。     

取代酚—咪唑Weng型环番的合成

用２，６－二（咪唑甲基）－４－氯苯酚分别与邻、间、对－二（溴甲基）苯或２，６－二（溴甲基）吡啶反应，合成了一类新型的取代酚－咪唑Ｗｅｎｇ型环番。所有化合物均被ＭＳ，＾１ＨＮＭＲ，ＩＲ和元素分析证实。     

苯乙烯对丙酮肟@H核磁共振的影响研究

研究了丙酮肟在四氯化碳和苯乙烯混合溶剂中随苯乙烯摩尔分数变化的^1HNMR，观察到丙酮肟分子中两个甲基共振峰的化学位移随苯乙烯摩尔分数增加而逐渐移向高场，而且两个甲基向高场移动的程度不同．ASIS值随苯乙烯摩尔分数增加而增加，两个甲基共振峰在四氯化碳中是一个单峰，而且当混合溶剂中苯乙烯的摩尔分数大于0.30时分裂为双峰．丙酮肟分子中两个甲基共振峰化学位移δ与混合溶剂中苯乙烯的摩尔分数呈良好的线性关系．     

3－羟基－2－丁酮、二丙酮醇在几种溶剂中的红外光谱研究

本文测定了３－羟基－２．丁酮（ａｃｅｔｏｉｎ）、二丙酮醇（ＤＡ）在四氯化碳、正庚烷、苯和１，２－二氯乙烷等中的红外光谱（３８００—３１００ｃｍ￣（－１））．根据谱峰的强度和峰位的变化，证实了ａｃｅｔｏｉｎ在溶液中能形成较稳定的五元环分子内缔合体，二丙酮醇可形成六元环分子内缔合体．另外，对甲醇、正了醇与ａｃｅｔｏｉｎ在四氯化碳中相互作用的红外光谱也进行了研究，结果表明，ａｃｅｔｏｉｎ分子中羰基和羟基的相互作用，使得自由基的吸收峰移向低频（△γ＝２０ｃｍ￣（－１）），同时羰基醇中羰基接受质子的能力亦被增强．     

化合物N—（2‘,4’,5‘—三氯）苯基—2—羟基—3,5,6—三氯苯磺 …

使用半径验分子轨道计算得到了化合物Ｎ－（２’４‘,５’－三氯）苯甘－２－羟基－３,５,６－三氯苯磺酰胺的一些电子性质,用分子力学程序ＭＭＰ２得到了该化合物的分子几何构型和稳定构象。计算时参数取自对分子Ｎ－甲基甲基磺酸胺的ａｂｉｎｉｔｉｏ计算研究和Ｘ－光晶体衍射结果。研究表明：原子Ｓ和Ｎ形成ｄ－ｐ配价键,通过此键,其电子进一步与两边的取代苯环共轭,ｄ－ｐ配价键对分子中的电子离域可能起着一个重要的桥梁     

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…     

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.     

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).     

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.