银片SERS信号随光照时间的变化关系

对刻蚀银片基底吸附分子ＳＥＲＳ效应随光照时间变化进行了研究，发现其ＳＥＲＳ强度随光照时间呈下降趋势；掺入Ｃｌ＾－１离子的影响与光照有关，随光照时间的增加，分子的拉强度出现反转     

氯离子对水杨酸表面增强喇曼散射的作用

在水杨酸与氯化钾具有不同克分子数比的条件下，通过对发生在铜表面上水杨酸分子ＳＥＲＳ效应的观测，对影响铜表面上水杨酸分子ＳＥＲＳ效应的因素进行了实验研究．结果表明，在水杨酸水溶液中，铜表面上ＳＥＲＳ效应的产生与溶液中氯化钾的加入密切相关．溶液中所含氯化钾的多少强烈影响着ＳＥＲＳ效应的强弱及分子的吸附性质．     

氯离子对水杨酸表面增强喇曼散射的作用

在水杨酸与氯化钾具有不同克分子数比的条件下，通过对发生在铜表面上水杨酸分子ＳＥＲＳ效应的观测，对影响铜表面上水杨酸分子ＳＥＲＳ效应的因素进行了实验研究，结果表明，在水杨酸水溶液中，铜表面上ＳＥＲＳ效应的产生与溶液中氯化钾的加入密切相关，溶液中所含氯化钾的多少强烈影响着ＳＥＲＳ效应的强弱及分子的吸附性质。     

东莨菪碱在薄层色谱原位的傅立叶变换表面增强拉曼光谱研究

利用高效薄层色谱（ＴＬＣ）分离技术与表面增强拉曼散射技术（ＳＥＲＳ）的结合，获得了分析东莨菪碱成分的新方法．ＳＥＲＳ结果表明，在ＴＬＣ原位约８μｇ样品就可获得东莨菪碱分子的主要振动特征谱带．通过光谱检测揭示出ＳＥＲＳ与固体光谱的异同，并指明了东莨菪碱分子与银溶胶的吸附模式．ＴＬＣＳＥＲＳ使高效分离与指纹鉴定结合，可对化学成分进行高灵敏度检测     

近红外付里叶变换表面增强喇曼散射技术的有效性研究

近红外激发的付里叶变换喇曼光谱是近年来发展起来的一项新技术，它吸引了人们对其应用研究的兴趣．本文将该技术与表面增强技术相结合形成的付里叶变换表面增强喇曼散射（ＮＩＲＳＥＲＳ）技术应用于高荧光量子产额分子的喇曼研究中，获得了其高质量的ＮＩＲＳＥＲＳ谱．本文的目的是淬灭荧光，进一步提高喇曼灵敏度，获得研究具有强荧光干扰的生物药物分子的ＳＥＲＳ方法     

东莨菪碱在薄层色谱原位的傅立叶变换表面增强拉曼光？…

利用高效薄层色谱（ＴＬＣ）分离技术与表面增强拉曼散射技术（ＳＥＲＳ）的结合,获得了分析东莨菪碱成分的新方法,ＳＥＲＳ结果表明,在ＴＬＣ原位约８μｇ样品就可锋得东莨菪碱分子的主要振动特征谱带,通过光谱检测揭示出ＳＥＲＳ与固体光谱的异同,并指明了东莨菪碱分子与银溶胶的吸附模式,ＴＬＣ－ＳＥＲＳ使高效分离与指纹鉴定结合可对化学成分进行高灵敏度检测。     

电泳力学迁移模型（Ⅱ）──SDS－蛋白质在无胶筛分电泳中的迁移规律

在不同操作电压和温度下，ＳＤＳ－蛋白质在无胶筛分电泳的实验结果表明，电泳力学迁移模型（ＥＭＭＭ）比传统经验式更能准确地反映实验事实．ＳＤＳ－蛋白质对构象参数（Ｒｃ）随热力学温度增加而变化，在２８８—２９８Ｋ范围内Ｒｃ迅速变小，而在２９８～３１３Ｋ范围内，温度变化对其影响不大．不同的ＳＤＳ－蛋白质在一定条件下具有相近的活化能，该结论进一步从热力学方面支持了ＥＭＭＭ的一个基本结论，即不同相对分子质量Ｍｒ的ＳＤＳ－蛋白质在同一ＮＧＳ实验条件下具有相似的形状或构象，并与ＳＤＳ－蛋白质分子为长棒状这一客观事实相符合．     

光照对植物细胞姊妹染色单体交换的影响

文章研究了可见光诱导大麦根尖细胞姊妹染色单体交换频率（ＳＣＥｓ）增高的原因．ＤＮＡ分子渗入５’一一溴脱氧尿嘧啶核苷（Ｂｒｄｕ）后，经可见光照射，可产生自由基，同时细胞的ＳＣＥ频率显著升高。能淬灭自由基的化合物如半胱氨酸和还原型谷胱甘肽部分地抵消了光照诱导产生的ＳＣＥｓ，而氧化型谷胱甘肽则无此作用，这证实光照可通过自由基诱导细胞ＳＣＥ频率增高。     

高分子材料表面改性过程的动力学机制

用感应耦合ＲＦＡｒ等离子体（ＩＣＰ）对ＰＴＦＥ－ＰＥ表面进行ＣＡＳＩＮＧ表面改性,使材料表面原始分子链的线性结构产生部分交链并提高了表面能。用ＸＰＳ为研究手段,测量出－ＣＨ２浓度随时间的变化关系,讨论了ＣＡＳＩＮＧ表面交链反应基本过程,解Ｃｌａｒｋ方程得出表面过程速率常数,体相过程速率常数以及ＣＡＳＩＮＧ表面反应深度。     

图形LOTOS和Petri同模型在PC机上的实现

在ＰＣ机上建立了一个由ＤＯＳ系统支持的图形ＬＯＴＯＳ（ＧＬＯＴＯＳ）软件工具．用这个工具，用户可以设计，显示一个ＧＬＯＴＯＳ说明，也可以把它转换成Ｐｅｔｒｉ网．该系统分为三个模块：ＤＲＡＷ，ＲＥＣＯＶＥＲ和ＴＲＡＮＳＦＥＲ．根据ＧＬＯＴＯＳ模型，模块ＤＲＡＷ给出了一个交互式的菜单系统，用这个系统，用户可以在图形窗口的任何位置画出ＧＬＯＴＯＳ的任一成分；模块ＲＥＣＯＶＥＲ可以自动恢复以前画好的ＧＬＯＴＯＳ模型；根据Ｐｅｔｒｉ网的表示，模块ＲＥＣＯＶＥＲ提供了从ＧＬＯＴＯＳ自动转换到Ｐｅｔｒｉ网的功能．     

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.     

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.     

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).     

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.