两个河北植物新记录种

经野外调查和标本采集与鉴定,发现细叶繁缕（Stellaria filicaulis Makino）和岩苦荚菜（Ixeris chelidonifolia（Makino）Stebb．）在河北省秦皇岛市有天然分布,这两种植物分别隶属于石竹科繁缕属和菊科苦荚菜属。     

山东繁缕属(石竹科)一新记录植物—无瓣繁缕

报道了山东石竹科繁缕属—新记录植物—无瓣繁缕,详细研究了其外部形态、花解剖和叶表皮微形态特征,比较了其与相近种无心菜和繁缕之间的区别.     

华北地区繁缕属种皮微形态及其系统学意义

利用扫描电子显微镜对华北地区繁缕属18种2变种以及同亚科5属6种的种皮微形态特征进行了观察研究.结果表明,繁缕属种皮细胞均为齿轮状,所研究的类群可大致分为以下2种类型:1)具有蛛丝状或颗粒状附属物,缺少次级纹饰;2)具有蛛丝状或颗粒状附属物的同时,表面具瘤状突起.种皮微形态特征所做的类型划分与传统的属下组的划分并不吻合,因此,不能作为分组的鉴别性状.种皮细胞齿的数目和种皮纹饰等在部分种类中存在明显差异,可作为种类划分和探讨亲缘关系的依据.繁缕亚科其他5属植物的种皮微形态同样出现齿轮状结构,说明齿轮结构可能是这些类群的共有祖征.     

獐牙菜亚族植物DNA条形码研究

为准确鉴定獐牙菜亚族植物(包含常用藏药"蒂达"(藏茵陈))的基原植物,实现对贮藏药材的标准化鉴别.本研究利用核基因ITS片段和叶绿体rbcL、mat K和trnH-psbA片段对獐牙菜亚族25种50个个体进行DNA条形码研究,结合4个候选条形码及其组合的种内、种间距离分布及物种鉴别率评价其在獐牙菜亚族植物中的应用效果.结果表明:核基因ITS片段不仅在单片段中鉴别率最高(80%),包含ITS片段的候选条形码组合的物种鉴别率均为100%,考虑mat K+ITS组合对种子植物的物种鉴别效果更好,推荐双条形码组合mat K+ITS为獐牙菜亚族植物的标准条形码.     

灰岩香茶菜与淡黄香茶菜的生药学研究

目的:对云南两种香茶菜属植物灰岩香茶菜与淡黄香茶菜进行系统的生药学研究,为其鉴别及开发利用提供科学依据。方法:采用来源鉴定、性状鉴定、显微鉴定及理化鉴定的方法。结果:两种香茶菜属植物根的横切面及粉末显微特征有一定差异。结论:实验结果可为其生药鉴定、质量标准的制订和进一步开发利用提供理论依据。     

苦苣菜属植物的化学成分及药理作用研究进展

苦苣菜属(Sonchs)植物全世界约有50种,在民间作为重要的药用植物使用.本文对我国该属8种植物的化学成分及药理作用进行综述,并对该属植物的研究提出展望.     

百合科植物比较形态解剖学研究——Ⅱ、万年青、吉祥草、紫花玉簪、芦荟、吊兰后生木质部管状分子的比较解剖

根据V.L.Cheadla关于单子叶植物解剖性状演化观点,即(1)根、茎、叶中均存在导管较根、根状茎中具导管或仅根中有导管进化;(2)导管分子短而宽较导管分子长而细进化;(3)单穿孔板类型较梯状穿孔板类型高级,而梯状穿孔板模隔数越少越高级.用上述3条标准对百合科(Liliaceae)中铃兰族(Conval-lavrieae)万年青属(Robdea Roth)万年青(R.japonica(Thunb.)Roth),吉祥草属(Reineckja Kunth)吉祥草(R.carnea(Andr.)Kunth.);萱草族(Hemero ca-lleae)玉簪属(Hosta Tratt.)紫花玉簪(H。albo-marginata(Hook.)Ohwi)芦荟族(Aloeae)芦荟属(Aloe L.)芦荟(A.vera L.var.chinensis(Haw.)Berg.);吊兰族(Asphodeleae),吊兰属(Chlorophytum Ker-Gawl.)吊兰(C.comosum(Thunb.)Peker)等植物的后生木质部管状分子进行比较解剖研究.结果表明:吊兰、芦荟、紫花玉簪较吉祥草、万年青进化.     

蓬子菜中酚酸类成分的分离与鉴定

对茜草科拉拉藤属植物蓬子菜(Galium verum L)全草的乙醇[Ф(乙醇)=95%]提取物进行分离和鉴定.经反复纯化制备化合物,并根据化合物的理化性质分析、波谱解析、对照品比较及与文献报道对比鉴定化合物的化学结构.从蓬子菜全草的乙醇[Ф(乙醇)=95%]提取物中分离得到7个化合物,分别鉴定为芥子酸(1)、丁香酸(2)、咖啡酸丁酯(3)、原儿茶酸(4)、4-羟基苯甲酸(5)、咖啡酸(6)和绿原酸(7),化合物1～5为从该属植物中首次分离得到.     

内蒙古女娄菜属植物的分类研究及其生态地理分布特点

Melandrium 究竞是与 Silene 合并,还是分开,看法不太一致。大多数国家或地区植物志,如:苏联植物志(1936)、日本植物志(1956)、北京植物志(1962)、秦岭植物志(1974)、东北草本植物志(1975)、江苏植物志(1982)、西藏植物志(1983)、新疆植物检索表(1983)等都是将这两个属分开的。但是,也有如:欧洲植物志(1964)、中国高等植物图鉴补编第一册(1982)等是将 Melandrium 并入 Silene 中,采用了广义的特征:花柱3(偶4,稀5),蒴果果爿2裂,为花柱数目的2倍。笔者认为,这样处理,似觉不妥,因为这     

12种龙胆科植物胚胎学资料的聚类分析

本文在平均欧氏距离系数基础上，运用UPGMA法，对12种龙胆科植物胚胎学资料进行了Q型聚类分析，聚类结果如下：(1)在树系图上，12种龙胆科植物明显分为4大类，其中第一大类包括椭圆叶花锚和四数獐牙菜，双蝴蝶属的峨眉双蝴蝶和假龙胆属的黑边假龙胆则分别单独聚为第三、第四类，其它8种植物共聚为第二大类；(2)獐牙菜属的4个种在胚胎学性状上明显分化3支，其中抱茎獐牙菜、西南獐牙菜与喉毛花聚为1支，红直獐牙菜与湿生扁蕾另聚1支，四数獐牙菜与椭圆叶花锚聚为1大类：(3)龙胆属的3个种与抱茎獐牙菜、西南獐牙菜、红直獐牙菜以及喉毛花、湿生扁蕾等共聚为一大类，且存在一定的分化，东北龙胆和线叶龙胆关系密切，条纹龙胆与前两者差异较大．聚类分析结果支持将双蝴蝶属、扁蕾属以及喉毛花属作为属级处理的意见，同时认为扁蕾属、喉毛花属和花锚属在系统学上与獐牙菜属有着密切的联系，獐牙菜属在低等类群中分化出扁蕾属，在高等类群中分化出花锚属，在中等进化的类群中分化出喉毛花属，而扁蕾属则进一步分化出龙胆属．     

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.