蕲春县蕲艾产业发展现状及对策分析

通过企业参观、问卷调查和采访等方法取得蕲春县蕲艾产业数据并进行了分析,反映了蕲春县蕲艾产业的发展现状及存在的产业发展制约问题.对当前制约艾产业发展的因素提出了有针对性的意见及建议,以期推动蕲艾产业快速发展.     

湖北蕲春九棵松野生蕲艾群落基本结构

通过α-多样性指数研究了蕲春九棵松野生蕲艾的群落基本结构。结果表明:该蕲艾居群面积约为15~20 m~2,植株数约25株左右,盖度仅为3%,为小居群。主要有10科13属13种植物与蕲艾相伴生。蕲春九棵松野生蕲艾群落的群丛名为刺槐+尖头青竹+野菊花。α-多样性指数分析表明蕲艾群落辛普森指数(D)、香农威纳指数(H′)和Pielou均匀度指数(J)分别为0.867、2.180和0.850。人为干扰和过度采集是影响该野生蕲艾居群恢复更新的重要原因。     

蕲艾燃烟化学成分的GC-MS分析

为试图找到更多对治疗疾病有效的成分,采用了苯-甲醇与正丁醇2种溶剂分别萃取蕲艾燃烟,利用GC-MS分析,分别得到了25与31个可鉴定结构的化学成分,主要为脂肪烃、芳香烃与萜类化合物及其氧化物,其中有13个结构相同.可能分别来自于蕲艾的不完全燃烧产物、蕲艾挥发油及其氧化产物.     

CO_2在油水混合物中的溶解度及饱和CO_2油水的密度

采用PVT法,在高压条件下测定了CO2在大庆原油和地层水中的溶解度,并计算了饱和CO2油、水相的密度和膨胀系数.实验结果表明:在实验条件下,CO2在原油和地层水中的溶解度随压力的升高而增大,饱和CO2油、水相的密度随CO2溶解度的增大而线性增大.饱和CO2液相的膨胀系数受实验压力和CO2溶解度的影响较大,受液相组成的影响很小.实验还测定了CO2在不同油水体积比混合物中的溶解度,发现恒定温度下CO2在油水混合物中的溶解度只与压力和液相组成有关,而不受其他条件影响.     

蕲艾燃烧灰烬化学成份的HPLC分析

目的：分离蕲艾燃烧灰烬甲醇提取物化学成分．方法：在C18柱,甲醇、水混合流动相（体积比10：90）,柱温30℃,检测波长219nm条件下用HPLC对样品进行分析。结果：获得14个独立峰,表明样品中至少含有14种化合物,结论：此方法分离蕲艾燃烧灰烬甲醇提取物化学成分有可行性。     

大庆渣油在超临界正戊烷中的平衡溶解度

在自建的高压相平衡测试装置上,测定了大庆减压渣油在超临界正戊烷中的平衡溶解度。并考察了平衡溶解度随各参数影响的变化规律。结果表明,溶解度随压力升高而增大,随温度升高而减小;溶剂比增加,溶解度减小,但脱沥青油(DAO)收率增加。当超临界正戊烷密度恒定时,溶解度还将随温度的增加而增大。试验结果还表明,在正戊烷的超临界区域内,采用等温降压、等压升温、升温降压和绝热膨胀等方式均可进行溶剂回收。     

稠油CO2混相体系性质研究

针对CO2在稠油开采过程中所起的作用,在室内对稠油CO2混相体系性质进行了研究。结果表明,在相同的温度下,随着压力的增高,原油对CO2的溶解度增大;同样压力的情况下,温度越高CO2的溶解度减小;CO2在油水系统油中所溶解的比例,随温度、压力的升高而减小,随含水量增加而下降;在温度一定的条件下,原油的黏度降低幅度随着压力增加、CO2溶解度增大而增大。     

蕲艾的道地性研究

通过对艾叶中挥发油、长链烷烃、鞣酸、黄酮的含量分析以及艾绒的发热量与艾条的最高燃烧温度的测量,从艾灸的药性作用、温补作用、温通作用三大机制的物质基础与作为中药的主要功能上探讨了蕲艾的优越性.结果表明:无论是作为艾灸的灸材还是作为中药饮片,蕲艾均具有明显的优势,称为艾叶的道地药材是实至名归的.     

布洛芬在超临界CO2中的溶解度测定

用动态法测定了布洛芬在SC－CO2的溶解度。结果表明，布洛芬在SC－CO2中的溶解度较大，其溶解度摩尔分率为10^-3-10^-2，而且随着温度的升高其溶解度降低，随着压力的升高其溶解度增大。     

卵黄油在超临界二氧化碳中的溶解度及其模拟

本文利用动态法及半连续装置，在温度３５℃－７５℃、压力２５ＭＰａ－２６ＭＰａ的条件下，进行了卵黄油在超临界二氧化碳中溶解度试验，并将试验结果用反传播神经网络方法进行模拟，社会网络能较好地模拟卵黄油在超临界二氧化碳中的溶解度。     

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).     

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.     

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.