水合铜离子的配位

关于水合铜离子的配位,在国内教科书中提法很多。有的认为水合铜离子铜的配位数是4,空间构型是平面正方形;有的认为水合铜离子中铜的配位数是6,空间构型是畸变八面体或四角形畸变;有的在同一本书中,就有不同的提法。这给教学带来不便。本文试图从如下两个方面给予讨论。     

用铜离子选择性电极测定矿石和土壤中的铜

目前,已试制出各种类型的铜离子选择性电极。本文报告用CuTe—Ag_2S制备的铜离子选择性电极测定铜的方法。研究了铜离子选择性电极的使用条件和干扰的消除,用于一些矿石和土壤中铜的测定,结果和铜试剂比色法一致。     

二十世纪初各省商办铁路及其结局

一、集资的性质和数量二十世纪初,在中国人民收回权利运动的同时,各省纷纷展开了商办铁路运动。所有各省商办铁路公司几乎都是在各地人民反对外国侵略和清朝政府出卖路权的斗争中成立起来的。各省筹办铁路首先是为了抵制帝国主义侵夺,确保铁路主权。有的省份,如广东、湖南和湖北,是在收回早经丧失给美国手中的粤汉铁路权以后,而相继组成公司筹办的;有的是为了阻止外国实现其初步获得的铁路权而筹办的,如为了废除苏杭甬铁路英国借款草合同,浙江、江苏两省先后组成公司,筹办该路;有的是为了杜绝外国的觊     

主成分分析多点pH络合滴定测定铜共存下的微量钯

钯和铜是性质十分相似的两种物质,要测定在大量铜存在下的微量钯,是有一定难度的。文中将主成分分析用于多点pH络合滴定,并用这种方法测定了EDTA络合物稳定常数极为相近的钯铜混合试样中钯的质量浓度。实验结果表明,将主成分分析多点pH络合滴定法用于铜钯质量浓度比为30∶1体系中钯的测定是可行的。     

关于可数复数集比较的一个引理的证明

通过构造辅助甬数对比较可数复数集的一个引理给出详细的初等证明,从证明中可以很好地体会遍历理论的思想.该方法也可用于有限集的比较,因此讨论了有限情形的实质,并且给出该引理的一个应用.     

甬商、徽商、晋商价值观比较

从自我认知、商帮凝聚力、经营理念和钱财出路四个方面展开,比较甬商、徽商、晋商的价值观,最后得出结论：甬商是本业商人,徽商是儒雅商人,晋商是金钱商人。     

甬籍院士品牌整合传播策略初探

甬籍院士品牌传播是一项极其复杂的系统工程,树立甬籍院士品牌,打造院士名人效应,提升宁波城市站位,增强宁波综合竞争实力,是甬籍院士品牌传播的核心所在。明确传播主体,研究传播对象,精心组织传播内容,积极拓展传播途径,如抓好媒体宣传,组织活动宣传,善用事件宣传,构建社区宣传模式,用好网络宣传,依托场馆宣传,多地协同宣传,是甬籍院士品牌传播的取得良好效果的重要策略。     

甲醇铜、乙酰乙酸乙酯铜的合成及性质研究

甲醇铜、乙酰乙酸乙酯铜的合成条件温和，实验表明：甲醇铜是含甲氧基桥键的二聚物，乙酰乙酸乙酯铜是铜的乙酰乙酯络合物．甲醇铜的活性比乙酰乙酸乙酯铜高，但甲醇铜易水解和不易溶于有机溶剂，而乙酰乙酸乙酯铜在有机溶剂中溶解性比甲醇铜大得多，乙酰乙酸乙酯铜可以代替中醇铜用于溶胶－凝胶法制备功能材料．     

铜离子荧光传感器研究进展

综述了用于检测铜离子的荧光传感器的研究进展,重点介绍了基于胺/酰胺、杯芳烃和纳米微粒合成的铜离子荧光传感器的结构和设计原理,概述了这些铜离子荧光传感器在检测过程中的优点及其实际应用价值,并展望了这些铜离子荧光传感器的研究和发展方向。     

甲醇铜,乙酰乙酸乙酯铜的合成及性质研究

甲醇铜、乙酰乙酸乙酯铜的合成条件温和，实验表明：甲醇铜是含甲氧基桥键的二聚物，乙酰乙酸乙酯铜是铜的乙酰乙酯络合物。甲醇铅的活性比乙酰乙酸乙酯铜高，但甲醇铜易水解和不易溶于有机溶剂，而乙酰乙酸乙酯铜在有机溶剂中溶解性比甲醇铜大得多，乙酰乙酸乙酯铜可以代替甲醇铜用于溶胶－凝胶法制备功能材料。     

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.