对二甲胺与环氧氯丙烷反应的质疑

在二甲胺与环氧氯丙烷的实验反应中，定性和定量了反应产物中Ｃ１－离子的存在，论证其主要反应产物不是３．３－二甲胺基－２羟基－氯丙烷。     

二环己基碳二亚胺的合成新工艺

利用环己胺和二硫化碳反应合成Ｎ，Ｎ′－二环己基硫脲（收率９１％），并以此为原料经氯代二甲胺和氯代二乙胺氧化得到二环己基碳二亚胺（收率９１．６％）。     

蒙脱土对木质素基环氧树脂材料的影响

以碱木质素为原料,三氟化硼乙醚为催化剂,用环氧丙烷对碱木质素进行丙氧基化改性后,与环氧氯丙烷反应合成木质素基环氧树脂。以合成的木质素基环氧树脂为基体,有机化蒙脱土为增强材料,采用插层复合法制备了木质素基复合材料。木质素基环氧树脂与有机蒙脱土有很好的相容性,用T31和甲基六氢苯酐作固化剂时,木质素基环氧树脂/有机化蒙脱土(OMMT)复合材料的拉伸强度和冲击强度均高于未加蒙脱土的木质素基环氧树脂。极少量的有机蒙脱土的加入可同时提高木质素基环氧树脂的韧性和强度。     

三苯丙烯腈衍生物的晶体结构和分子结构

用Ｘ射线单晶衍射法测定了化合物１－二（４－二甲胺苯基）－２苯基丙烯腈（ＴＰＡ－１）１－二（４－二甲胺苯基）－２－（４－氯苯基）丙烯腈（ＴＰＡ－２）及１－二（４－二甲胺苯基）－２（３,４－亚甲二氧基苯基）丙烯（ＴＰＡ－１１）的晶体结构和分子结构,ＴＰＡ－１分子式为Ｃ２５Ｈ２５Ｎ３,单斜晶系,空间群Ｐ２１／ｃ,ａ＝１．０５９３（１）ｎｍ,ｂ＝２．１６３９（２）ｎｍ,ｃ＝１．００８１（１）ｎｍ;β＝１１     

3—N,N—二甲胺基—2—羟基硫代磺酸钠基丙烷的合成与生物活…

３－Ｎ，Ｎ－二甲胺基－２－羟基硫代磺酸钠基丙烷是杀虫双工业品中存在的一种副产物。本文报导了这种化合物的合成方法，以环氧氯丙烷与二甲胺及硫代硫酸钠经两步反应而制备，通过薄层色谱、循环代安、红外光谱对其结构进行拼测试了它的生物活性。     

阳离子淀粉的干法研制

用３－氯－２羟丙基三甲胺氯化物和碱性催化剂的混合物，在干燥条件下，与淀粉（例如玉米淀粉反应，以制备阳离子淀粉，该方法没有任何污染。     

α—氧代烯酮环二硫代缩酮化学（XXXI）

缩酮基为六元环，具三亲电中心的α－肉桂酰基烯酮－１，３－亚丙二硫基缩酮（２），与乙基、丙基、丁基、苯基及苄基卤化镁等的反应均得到β‘－碳上的共回顾加成产物（３），该反应证实了（２）中环二硫缩酮基对这一加成反应的调控作用。     

3-氯-2-羟丙基三甲基醋酸铵的制备

论述了用冰醋酸和三甲胺反应生成醋酸三甲铵，然后再与环氧氯丙烷反应生成３－氯－２－羟丙基三甲基醋酸铵的合成方法及其影响因素。结果表明，反应终点的ｐＨ值对产品中的残余环氧氯丙烷含量影响很大，ｐＨ值越高，残余环氧氯丙烷含量越低，当ｐＨ值大于８时，残余环氧氯丙烷含量为０。     

MAPCATI改性环氧丙烯酸双酯的合成及其紫外光固化涂料

采用自制个甲基丙烯酰氧β－丙氧甲酰氨基甲苯２－异氰酸酯（简称ＭＡＰＣＡＴＩ）中的异氰酸基与自制环氧丙烯酸双酯中羟基上的氢反应，制得了改性树脂；并以此为基料配成紫外光固化涂料。所得涂层性能优良，有应用前景。     

2—（1—萘甲基）—3—（2—四氢呋喃基）丙酸N,N—二乙氨基乙酯草酸盐？…

目的 改进２－（１－萘甲基）－３－（２－四氢呋喃基）丙酸Ｎ,Ｎ－二乙氨基乙酯草酸盐（ＶＩ）合成方法,方法 在１－氯甲基萘和四氢糠基丙二酸二乙酯（Ｉ）的烷基化反应中使用ＮａＨ／ＤＭＦ为催化剂;在２－（１－萘甲基）－３－（２－甲氢呋喃基）丙酸（ＩＶ）与２－氯乙基－Ｎ,Ｎ－二乙基胺的酯化反应中加入相转移催化剂;在２－（１－萘甲基）－３－（２－四氢呋基）丙酸Ｎ,Ｎ－乙氨基乙酯（Ｖ）与草酸成盐中,直接一水合     

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.