纳米Al(OH)3表面改性及其在EVA中的阻燃应用

研究了硅烷偶联剂G湿法表面改性纳米Al(OH)₃（ATH）及其在乙烯-乙酸乙烯酯共聚物（EVA）体系中的阻燃应用，确定了G的最佳质量分数1.5％和最佳改性pH值5-6。通过沉降试验、红外光谱及复合材料力学性能等对改性效果进行了表征：改性后粉体在液体石蜡中沉降速度明显降低，红外光谱图表明改性粉体表面有效键合了有机物质，拉伸测试表明添加改性粉体的复合材料力学性能明显提高。将改性纳米ATH应用于EVA阻燃，当无机填料质量分数为55％时，复合材料力学、阻燃性能即可达到性能要求。     

NaBH_4水解制氢泡沫镍载钌催化剂

研究了泡沫镍载钌催化剂制备过程中,RuCl3溶液浓度、pH值和浸渍时间对催化剂性能的影响,以及反应放热与体系温度之间的关系.结果表明,当0.2 g泡沫镍在浓度为0.025 mol.L-1、pH值为5～7的RuCl3溶液中浸渍25 h后,制备出的催化剂在质量分数15%NaBH4、3%NaOH溶液中的平均制氢速率可达到600 mL.min-1.用该催化剂在20 mL NaBH4碱性溶液中使用时,水解放出的热量可使反应体系温度达到80℃.     

西梅花色苷浸提工艺及降解特性

为取得较好的浸提效果,获得西梅花色苷浸提工艺条件及相关降解动力学参数,研究浸提溶剂、乙醇体积分数、料液质量浓度、pH值、浸提温度和浸提时间对西梅花色苷浸提效果的影响,同时研究了pH值、抗坏血酸、葡萄糖对西梅花色苷稳定性的影响及降解动力学过程.发现在浸提溶剂为60％酸性乙醇溶液、料液质量浓度1/10 g·mL-1、浸提时间2.0h、pH2.0、浸提温度60℃时获得较好的浸提效果(浸提得率1.52mg·g-1新鲜西梅).在西梅花色苷中添加质量分数0.01％抗坏血酸或10％葡萄糖,并进行加热处理研究其降解过程活化能、反应速率常数及半衰期的变化,同时对西梅花色苷的热降解动力学进行研究,结果表明:西梅花色苷在本研究条件下降解过程符合一级动力学反应,其热降解活化能在pH3.0时为69.12 kJ·mol-,增加或降低pH都使其活化能减小；在添加质量分数0.01％抗坏血酸、10％葡萄糖后,其活化能分别为下降86.49％和73.15％,表明西梅花色苷添加抗坏血酸或葡萄糖稳定性降低.     

微波接枝改性尼龙66织物的阻燃性能

采用微波技术将甲基丙烯酸缩水甘油酯(GMA)和9，10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)依次接枝到尼龙66织物表面，以提高其阻燃性能。探讨了引发剂质量分数、单体质量分数、反应时间和反应温度对接枝率和缩合率的影响，得到了最佳反应条件：引发剂KPS的质量分数0.3%，GMA单体质量分数5%，反应时间90min，GMA反应温度70℃；DOPO缩合反应时间4h，反应温度140℃，微波功率500W。对接枝后尼龙66织物的表面形貌采用衰减全反射-红外光谱（ATR FT-IR）与扫描电镜（SEM）进行表征，通过热重分析（TGA）、垂直燃烧及氧指数（LOI）测试对织物的热行为和阻燃性能进行了分析，测试了织物的力学性能，并对接枝织物的阻燃机理进行了初步探讨。结果表明：接枝后织物的成炭性能明显增强，阻燃性能得到改善。     

异枝麒麟菜活性硫酸粗多糖的提取工艺优化

采用能有效保护抗病毒活性基团的直接水提法提取异枝麒麟菜活性硫酸多糖，通过正交试验研究了影响多糖得率的工艺参数：KCl质量分数、温度、时间、料液比；通过均匀试验研究了其中影响最大的因素的最佳水平．结果表明，温度和KCl质量分数为多糖得率的最大影响因素，其最佳水平分别为125℃和0．93％．结合实际情况，最佳提取工艺条件可为：浸提温度95～100℃、浸提时间6h、料液质量比1：90、KCl质量分数0．93％．     

甲壳素与纤维素复合物对水中Hg~(2+)离子的吸附

以甲壳素与脱脂棉为原料,用6%质量分数NaOH和5%质量分数硫脲混合溶液作溶剂,以5%质量分数硫酸作絮凝剂絮凝得到甲壳素纤维素复合物,研究了甲壳素和纤维素的比例、甲壳素纤维素复合物的用量、吸附时间、吸附温度、溶液pH值对吸附率的影响.实验结果表明,当被吸附对象的用量是40mL10mg/L汞标液,甲壳素与纤维素的比例为2∶1、吸附剂用量为2.5g,吸附时间为2h,温度为40℃,溶液pH值为4.0时,复合物对汞离子吸附率可达94.19%.     

苦瓜皂甙的提取过程研究

研究了苦瓜皂甙的提取工艺和测定方法．以苦瓜皂甙中主要成分Mordicoside A为对照，采用分光光度法对苦瓜中皂甙成分进行定量分析；以提取温度、浸泡时间、乙醇的质量分数和料液比为考察因素，采用单因素试验及正交试验对苦瓜中皂甙进行了提取务件优化的试验．试验结果表明：浸提温度60℃，浸提时间6h，乙醇质量分数为70％及料液比1：5为最佳提取条件．苦瓜皂甙粗品的提取率为苦瓜干粉的0．052％，其中皂甙的质量分数为43．333％．     

活性紫染料纳滤脱盐精制的研究

对某染料厂提供的活性紫粗制染料液进行了纳滤膜筛选和脱盐浓缩精制的间歇恒容渗滤实验研究膜筛选实验表明：DK膜较之DL膜和NF270膜更适合于活性紫染料脱盐浓缩精制的渗滤过程。间歇恒容渗滤操作参数为：活性紫粗制染料液含染料质量分数5％，含盐质量分数0．8％；染料含盐质量分数为16％，渗滤操作压力1．0MPa，膜面循环通量1．4m^3／h，渗滤浓缩2倍，渗滤时间80h，结果含盐质量分数降至0．75％，染料纯度达到99％以上；最后将料液浓缩3倍，以降低后续喷雾干燥的能耗。该实验研究为工业化提供了依据.     

桔皮类黄酮乙醇提取工艺研究

研究了桔皮类黄酮的乙醇提取工艺,以桔皮类黄酮质量分数为考察指标,通过单因素和正交试验,考察提取温度、乙醇质量浓度、固液比、提取时间对类黄酮质量分数的影响,结果确定最佳提取工艺条件为:提取温度70℃,固液比1∶25,乙醇质量分数70%,提取时间2 h.在最佳提取条件下,提取率可达22.03%.     

电化学处理对硝基苯酚模拟废水的研究

以钛钌电极为阳极、钢板为阴极,对含对硝基苯酚（PNP）的模拟废水进行了电化学处理．试验研究了外加电压、极板间距、电解质质量分数、溶液pH值、电解时间等因素对PNP处理效果的影响,结果表明：外加电压7V,pH=10～11,极板间距2cm。支持电解质Na2S04质量分数0．5％的条件下,电解5h,PNP的去除率可达89．3％．     

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.