解表类中草药中微量元素的主成分分析

通过SPSS13.0软件对解表类中草药中的微量元素进行主成分分析,得到了解表类中草药微量元素间的相关矩阵、特征值及方差贡献率,并对中草药的质量做了综合评价,这为中草药的研究提供了一定的理论依据,可以帮助我们更好的研究分析中草药中微量元素的作用,同时对解表类中草药的质量优劣作出科学的评价.     

11种中药中微量元素的主成分分析

应用化学计量学方法,计算了11种中草药中微量元素之间的相关矩阵、载荷矩阵及各因子的综合得分,其中各微量元素的因子得分和主成分分析可以用于这11种中药药材的综合质量评价,为中药药理研究提供了一定的理论依据.     

治疗胆结石类中草药中微量元素的主成分分析

通过SPSS13.0软件对中草药中的微量元素进行主成分分析,获得微量元素之间的一些内在关系.通过主成分分析可以评价中草药的质量优劣,找到微量元素与人体健康的联系,从而为中草药的机理研究提供一定的理论基础.     

五味中草药中微量元素的综合评价

对五味中草药中微量元素进行分析,通过主成分分析的方法对中草药中微量元素进行综合评价,通过因子分析微量元素K、Ca、Mg、Cu、Zn、Fe、Mn等7种元素的功效,结果表明:这些元素与中药的药理作用有相关性.     

十二种花类药材中八种微量元素的主成分和因子分析

应用化学计量学方法研究了十二种花类药材中所含微量元素之间的关系,结果表明应用四个主成分可以合理解释微量元素之间的相关关系; 主成分分析和因子得分可以用于十二种不同花类药材质量的综合评价,为花类药材的合理利用提供了可靠依据.     

青海6种主要农产品中微量元素的特征分析

采用主成分分析法,对青海省海东地区6种主要农产品中10种矿物元素含量与产品品质之间的关系进行综合评价。通过该法对微量元素的含量数据进行降维处理,并利用SPSS 19.0软件进行计算,提取特征值大于1.2的成分为主成分,其结果显示前3个主成分的累计方差贡献率达到86.15%,即保留了全部原始数据86.15%的信息,基本能反映总体情况。主成分综合得分反映出微量元素在6种农产品中的总体含量水平,其顺序由高到低依次为:春小麦蚕豆玉米青稞豌豆油菜籽,进而体现了微量元素在几种农产品中的分布特征。分析结果表明主成分分析和因子得分可以用于农产品质量的综合评价,为农产品生产、品质评价及相关研究提供数据支撑和科学依据。     

治疗高血压病中草药中微量元素的主成分分析

采用主成分分析法对7种治疗高血压的中草药中的微量元素进行分析,获得治疗高血压的中草药中微量元素之间的相关关系,并对这7种中草药进行了综合排名,得到了7种中草药的质量优劣,分析总结出了微量元素的作用,研究对治疗高血压中草药的研发提供一定的理论依据。     

11个不同产地枸杞子中微量元素和黄酮的主成分分析

利用主成分分析对11个不同产地枸杞子中的5种微量元素和黄酮含量进行分析,找到微量元素和黄酮的含量与枸杞子质量优劣的相关关系,得到不同产地的枸杞子质量优劣的综合排名.然后利用聚类分析对11种不同产地枸杞子进行聚类,结果恰好与主成分分析结果一致,说明主成分分析法所建的枸杞质量优劣评价模型稳定可靠,可以为枸杞子质量优劣评价研究提供一定帮助.     

粉煤灰品质主成分分析综合评价

为解决目前粉煤灰单因子评价方法不能全面综合反映粉煤灰品质的弊端,采用主成分分析方法,建立用于评价大掺量粉煤灰混凝土中粉煤灰品质性能的综合评价法.研究结果表明:利用R软件强大的统计功能,运用主成分分析原理,可以将粉煤灰样本的大量性能表征指标构造成少数的几个变量,并通过计算各样本的主成分值,以各主成分的贡献率为权重值,得出各粉煤灰样本的综合得分,通过最终的主成分综合得分来划分粉煤灰质量等级,实现对粉煤灰品质进行快捷、客观的综合评价.     

组合模型在酿酒葡萄品质综合评价中的应用

利用主成分分析法、综合评价法、加权灰色关联度分析和TOPSIS方法,针对27个酿酒葡萄样品建立组合模型,对酿酒葡萄的品质进行综合评价,得到样品2、9和23质量很好,样品7、11、12和18质量很差,其它样品质量在二级与三级范围内。     

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…     

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.     

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.