萃取催化动力学光度法测定痕量锰

研究了在pH9．7的介质中,利用Mn（2＋）催化过氧化氢氧化水杨醛显色的指示反应,用萃取平衡控制反应时间及反应程度,通过测量500nm下水相的吸光度,建立了萃取催化光度法测定痕量锰的新方法方法的线性范围为0．020－0．20μg／ml,检出限为0．010μg／ml用于水样中痕量锰的测定,结果满意。     

人发中锰的原子吸收光谱测定精密度的探讨及锌铜铁锰的联合测定

用自制的混合均匀的发样研究了人发中锰的火焰原子吸收光谱测定结果精密度欠佳的原因。实验证明人发基体不产生化学干扰,测锰的3σ检出下限为0.03μg/ml;用改变称样量的试验证明,出自样品均匀度的要求,称样量不小于0.3g时,样品溶液定容至10ml可保证变异系数≤2.4％。     

痕量锰的催化光度法分析

本文根据在近中性溶液中 ,痕量锰 (Ⅱ )对高碘酸钾氧化氨基黑 10B褪色反应的催化作用建立了检出极限为 0 .0 2 μg/mL、线性范围为 0 .45～ 9.5 μg/mL的测定锰的新方法 ,适用于人发、人尿中痕量锰的测定。     

藏红O-高碘酸钾体系催化光度法测痕量锰的研究

本文研究了在pH5.2的NaAc-HAc介质中,痕量锰对高碘酸钾氧化藏红O反应的催化作用,建立了一个测定痕量锰的新方法,线性范围为0-0.4μg/25ml,检出限为1.51×10~(-10)g/ml,并用于铝合金标样,环境水标样中痕量锰的测定.     

催化动力学光度法测定痕量锰

研究了在NH3-NH4C1介质中，Mn^2 催化H2O2氧化偶氮胭脂红的褪色反应的反应条件，建立了测定痕量锰的新方法．该方法的线形范围为0～80μg／L Mn^2 ，检出限为0．6μg／L．用该方法测定水样中锰的含量，获得满意结果．     

分光光度法测定矿石中痕量铅

用双硫腙显色分光光度法测定铁矿石中痕量铅，该方法具有简单、快速、灵敏等特点，用以测定铁矿石中的痕量铅，获得了满意的结果．检出限为0．06μg／mL，线陛范围为0．01μg／mL～1．0μg／mLPb^2＋，相关系数为0．9996，回收率89％～99％．     

催化动力学光度法测定痕量锰──KIO_4-Mn(Ⅱ)-Phen-溴甲酚绿体系

基于在弱酸介质中，锰（Ⅱ）催化高碘酸钾氧化溴甲酚绿的反应，建立了动力学分光光度法测定痕量锰（Ⅱ）的新方法，方法的检出限为578×10－1gg／ml，测定线性范围为0～0.30μg／15ml，直接用于大米、面粉和自来水中痕量标的测定，均获得满意的结果。     

KBrO3氧化二溴羧基偶氮胂褪色光度法测定Ti(Ⅳ)

基于稀H2SO3介质中,痕量钛（Ⅳ）催化KBrO3氧化二溴羧基偶氮胂（DBCAA）的褪色反应,建立了测定痕量钛（Ⅳ）的催化动力学光度法．方法检出限为0．15μg／L,线性范围为0．0～8．0μg／L．结合溶剂萃取分离,可用于测定人发、植物、茶叶及岩石样品中的痕量钛（Ⅳ）．     

离子增强-反相高效液相色谱法快速测定落羽杉中莽草酸

建立了离子增强反相高效液相色谱法(RP-HPLC)快速测定落羽杉中痕量莽草酸的方法．用色谱柱Hyper- silODS 25μm(4．6 mm×150 mm),以HClO4(pH=2．5)溶液为流动相,柱温30℃时于214 nm波长处以外标法测定．结果表明莽草酸在2．22×10-8-3．59×10-4g／mL范围内,浓度与峰面积有良好的线性关系(r=0．999 8)．莽草酸的回收率为98．52％-98．91％,相对标准偏差为1．45％-1．70％(n=5)．检测限为2．02×10-10g／mL(S／N= 2)．实验表明该法简便、快速,应用于实际落羽杉样品中莽草酸的测定,取得了很好的结果．     

丁基罗丹明B—溴酸钾—溴代十六烷基吡啶体系催化光度法测定痕量钒的研究

本文研究了在柠檬酸介质中,有溴代十六烷基吡啶存在时钒催化溴酸钾氧化丁基罗丹明B的褪色反应,建立了催化光度法测定痕量钒的新方法．本方法的线性范围为0．010－0．200μg／25ml,检出限为13×10－10g／ml．用于岩石中痕量钒的测定,结果满意．     

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.