β—环糊精改性淀粉类高吸水树脂的制备及其性能研究

将β－环糊精分子用环氧氯丙烷预交联后，与淀粉、丙烯腈混合、，用硝酸铈铵作引发剂接枝共聚，经水解可得拥有疏水空腔的β－环糊精改性高吸水树脂。该吸水树脂除具有良好的吸水和保水性能外，还对药物、香料等疏水性有机分子具有良好的包合或吸附作用。     

一种羟基改性的氯乙烯-醋酸乙烯共聚树脂的均相合成

采用均相法对氯乙烯-醋酸乙烯酯二元共聚树脂进行了羟基改性研究。文中考察了反应温度θ、反应时间t、碱与二元氯-醋共聚树脂的质量比、溶剂甲醇与二元氯-醋共聚树脂的质量比、加料方式等因素对三元共聚物中羟基含量的影响。在t=5h，θ=40℃，ω(NaOH)：ω(氯-醋二元共聚树脂)：0．012：1，ω(甲醇)：ω(氯-醋二元共聚树脂)=1：3.5，R=300r／min的条件下，可得到与进口产品——美国UCC公司VAGH树脂组成接近的共聚物。     

淀粉-丙烯酸接枝共聚物的生物降解研究

采用真菌生长法和土壤掩埋法对淀粉－丙烯酸接枝共聚高吸水树脂的生物降解性能进行了研究，运用表现观察法、重量测定法对试样的降解过程进行了测试，并对原有的测试方法作了改进，试验结果表明，淀粉－丙烯酸接枝共聚物具有较好的生物降解性能。     

交联淀粉—碘甲基化聚丙烯酰胺的合成与吸水性

在铈盐引发下用淀粉与丙烯酰胺共聚并进行部分交联得接枝共聚物（ＣＳ－ｇ－ＰＡＭ）继之与多聚甲醛和偏重亚硫酸钠反应制备交联淀粉－在化聚丙烯酰胺（ＣＳ－ｇ－ＳＰＡＭ），该树脂具有高吸水性，其吸水性受反应条件、单体配比、交联度、磺化程度等因素的影响。     

苯酚甲醛-M废渣共聚树脂的合成

以M废渣、苯酚、甲醛为原料，共聚合成了热塑性树脂，研究了反应条件、共聚组分对共聚物结构和性能的影响．通过试验确定，苯酚与M废渣的质量比为80g／20g，甲醛用量40mL，磺化用浓硫酸、废树脂比例为100mL／110g时制得的共聚树脂在试验范围内具有较好的综合性能。     

甲基丙烯酸十二酯与甲基丙烯酸辛酯共聚高吸油性树…

本利用悬浮聚合法，以甲基丙烯酸十二酯和甲基丙烯酸辛酯为单体，合成了共聚型高吸油性树脂，还研究了共聚单体的配比，交联剂用量、引发剂用量、分散剂用量、油／水比诸因素对高吸油性树脂的性能影响，制得的树脂可以吸其自身重量１０．９的煤油，９倍的苯。     

淀粉-丙烯酸-丙烯酰胺共聚物合成新工艺

研究了淀粉－丙烯酸－丙烯酰胺接枝共聚制备高吸水性树脂的新工艺．“中试”及产品性能测试结果表明,盘式聚合工艺简便、易操作,对设备结构无特殊要求,成本低,所得到的产品具有较高的吸水率和吸水速率     

淀粉接枝共聚高级水性树脂的合成及其性质研究

以玉米淀粉和丙烯基单体为主要原料，对淀粉接枝共聚高吸水性树脂进行中性一步法合成，优化合成反应路径。根据自由基聚合反应机理，在引发剂及交联剂作用下淀粉与丙烯基单体进行接枝共聚反应，定性及定量地分析反应物溶液pH值、反应温度、引发剂用量以及单体与淀粉的配比等因素对高吸水性树脂吸水性能的影响，从而找出最佳反应条件。同时采用量子化学ab initio UHF方法在6－31G基组水平上对两类淀粉链段自由基模型进行几何优化，分析体系的净电荷、前线分子轨道分布规律，以及自由基的稳定性和反应性特征，揭示接枝共聚反应机理。     

松根轻油—苯乙烯阳离子共聚合的研究

本文对精制松根轻油—苯乙烯的阳离子共聚合进行研究,系统地考察了该共聚合体系的各个主要影响因素,优选出适宜的共聚合条件。该共聚树脂的产率可达82％,其中,固态树脂的产率可达67％。通过对主原料(松根轻油,沸点110～200℃)的色谱—质谱联用分析和对松根轻油—苯乙烯共聚树脂的红外光谱分析,可确认该树脂为萜烯—苯乙烯共聚树脂,进而可推测出其分子结构。该共聚树脂为芳香族改性萜烯树脂,可用作热熔胶的增粘树脂在胶粘剂工业中推广应用。     

一种羟基改性的氯乙烯-醋酸乙烯共聚树脂的均相合成

采用均相法对氯乙烯 -醋酸乙烯酯二元共聚树脂进行了羟基改性研究。文中考察了反应温度θ、反应时间t、碱与二元氯 -醋共聚树脂的质量比、溶剂甲醇与二元氯 -醋共聚树脂的质量比、加料方式等因素对三元共聚物中羟基含量的影响。在t=5h,θ=40℃ ,ω(NaOH) :ω(氯 -醋二元共聚树脂 )=0.012:1,ω(甲醇 ) :ω(氯 -醋二元共聚树脂 )=1:3.5,R=300r/min的条件下 ,可得到与进口产品———美国UCC公司VAGH树脂组成接近的共聚物     

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…     

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.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.