马尾松不同种源染色体荧光带型的研究

分析了我国南方主要树种马尾松7个种源染色体的两种荧光带型，色霉素A3（简称CMA带）和4，6－二脒基－2－苯基咪哚（简称DAPI带）。结果表明：（1）马尾松染色体的CMA带型中存在着5种不同类型，它们分别是1对为着丝粒和臂间处均有荧光带的中间着丝粒染色体（A类型）；6对为臂间处有荧光带的中部着丝粒染色体（B类型）；1对为着丝粒处有荧光带的中部着丝粒染色体（C类型）；3对为无荧光带的近中部中部着丝粒染色体（D类型）；1对为着丝粒处有荧光带的近中着丝粒染色体（E类型）。其CMA带型公式2n=24=2A 12B 2C＋6D＋2E。（2）根据CMA的带型状况，将马尾松的7个种源分为2种类群区，第一类为江西吉安，福建漳平，贵州贵阳，四川古蔺和湖南宜樟为中部区；第二类为广东高州和广西宁明为南部区。（3）比较马尾松7种源的DAPI带型，南部区种源的染色体上的荧光带纹较中部区种源染色体上荧光带纹要多些，西部区种源染色体上的荧光带纹较东部区种源染色体上的荧光带纹亦要多些。     

黑芥（Brassica nigra）核型和Giemsa C带带型的研究

研究了黑芥的核型和染色体的Ｇｉｅｍｓａ Ｃ带带型，黑芥有８对染色体，４对是中部着丝粒染色体，其中４对是亚中部着丝粒染色体，在４对亚中部着丝粒染色体中有２对具随体，黑芥的核型公式为２ｎ＝２ｘ＝１６＝８ｍ＋４ｓｍ＋４ｓｍ（ＳＡＴ）用ＨＳＧ法得到ＧｉｅｍｓａＣ带带型，黑芥的Ｃ带带型为ＣＩＴ型，黑芥的染色体具有着丝粒带、中间带，端带和全带，黑芥的ＧｉｅｍｓａＣ带带型公式为２ｎ＝２ｘ＝１６＝ＣＩＴ型＝２Ｃ＋     

山绿豆的染色体核型分析

对山绿豆的染色体数目及核型进行了初步研究,结果２ｎ＝２２。核型分析表明,１１对染色体中,２对为正中着丝粒染色体,８对为中部着丝粒染色体,１对为近中部着丝粒染色体,其核型公式为Ｋ２ｎ＝２ｘ＝２２＝４Ｍ＋１６ｍ＋２ｓｍ,核型类型为２Ｂ型,与栽培绿豆核型Ｋ２ｎ＝２ｘ＝２２＝１８ｍ（２ＳＡＴ）＋４ｓｍ型类型（２Ｂ）相比,二者在染色体数目及核型类型上是一致的,但染色体类型及每种类型的数量是不同的。     

山绿豆(Phaseolus minimus Roxb.)的染色体核型分析

对山绿豆（ＰｈａｓｅｏｌｕｓｍｉｎｉｍｕｓＲｏｘｂ．）的染色体数目及核型进行了初步研究,结果２ｎ＝２２．核型分析表明,１１对染色体中,２对为正中着丝粒染色体,８对为中部着丝粒染色体,１对为近中部着丝粒染色体,其核型公式为Ｋ２ｎ＝２ｘ＝２２＝４Ｍ＋１６ｍ＋２ｓｍ,核型类型为２Ｂ型,与栽培绿豆（Ｐ．ａｕｒｅｕｓＲｏｘｂ．）核型Ｋ２ｎ＝２ｘ＝２２＝１８ｍ（２ＳＡＴ）＋４ｓｍ核型类型（２Ｂ）相比,二者在染色体数目及核型类型上是一致的,但染色体类型及每种类型的数量是不同的．     

草绿异色蝗的染色体C-带核型

报道了珍稀昆虫草绿异色蝗ＤｉｍｅｒａｃｒｉｓｐｒａｓｉｎａＮｉｕｅｔＺｈｅｎｇ）的染色体Ｃ－带核型．该种蝗虫（副模１）的核型为２ｎ＝２２＋ＸＯ，，全部染色体为端部着丝粒染色体，Ｃ带主要分布在着丝粒区，３号染色体具有端带，５号染色体Ｃ带带纹非常丰富     

短角外斑腿蝗核型和C-带的研究

本文研究了短角外斑腿蝗（Ｘｅｎｏｃａｔａｎｔｏｐｓｈｕｍｉｌｉｓｂｒａｃｈｙｃｅｒｕｓ）的核型和Ｃ带。结果表明：短角外斑腿蝗的染色体数目为２ｎ（）＝２２＋ＸＯ＝２３，全部为端着丝粒染色体；ＮＦ＝２３；核型公式为２ｎ（）＝２ｘ＝２３ｔ。中期染色体绝对长度为７００１±２７０μｍ，按相对长度可分为三组；除所有染色体都具有明显的着丝粒带外，Ｌ２，Ｍ３，Ｍ４，Ｍ５，Ｍ９还有明显的端带；染色体组中Ｃ带带纹总长与染色体总长的比值百分数为２６００±２２０％；最长与最短染色体之比为３７８∶１，臂比大于２∶１的染色体在染色体组中的比例为零，短角外斑腿蝗的核型属“１Ｂ”核型     

贵阳地区蝗虫的染色体研究

本文报道了贵阳地区５科１６属２０种蝗虫的染色体研究结果：２０种蝗虫中除锥头蝗科２种负蝗的染色体数目为２ｎ（）＝１８＋ＸＯ＝１９外，其余都是２ｎ（）＝２２＋ＸＯ＝２３，但所有染色体都是端着丝粒染色体，都具有着丝粒Ｃ－带；所不同的是染色体长度，核型类型，Ｃ－带带纹及其总长度与染色体组长度的比值％等     

草绿异色蝗珠染色体C—带核型

报道了珍稀昆虫草绿异色ｍｅｒａｃｒｉｓ ｐｒａｓｉｎａ Ｎｉｕ ｅｔ Ｚｂｅｎｇ）的染色体Ｃ－带核型、该种蝗虫的型为２ｎ＝２２＋ＸＯ，全部染色体为端部着丝粒染色体，Ｃ带主要分布在着丝粒区，３号染色体具有端带，５号染色体Ｃ带带纹非常丰富。     

云斑车核型和C—带的研究

研究了云斑车蝗（Ｇａｓｔｒｉｍａｒｇｕｓ ｍａｒｏｒａｔｕｓ ｔｈｕｎｂｅｒｇ１８１５）的核型和Ｃ－带。结果表明：云斑车蝗的染色体数目：２ｎ（♂）＝２２＋ｘＯ＝２３,全部为端部着丝粒染色体;核型公式：２ｎ（♂）＝２ｘ＝２３ｔ,ＮＦ＝２３。按相对长度云斑车蝗染色体可分成Ｌ、Ｍ、Ｓ３组。除所有染色体均有明显的着丝粒带外,Ｘ染色体还有端带。最长与最杂色体之比为３．８１：１。臂比大于２：１的染色体在染色体     

旋花科三种植物的染色体研究

对旋花科三种植物的染色体进行了研究,结果显示：藤长苗（Ｃａｌｙｓｔｅｇｉａｐｅｌｉｔａ（Ｌｅｄｅｂ．）Ｇ．Ｄｏｎ）染色体数目为２ｎ＝２０,核型公式Ｋ（２ｎ）＝２０＝２Ｍ＋１６ｍ＋２ｓｍ,核型“１Ｂ”型;打碗花（ＣａｌｙｓｔｅｇｉａｈｅｄｅｒａｃｅａＷａｌ．）的染色体数目为２ｎ＝２０,核型公式Ｋ（２ｎ）＝２０＝２Ｍ＋１６ｍ＋２ｍ（ｓａｔ）,核型“１Ａ”型;田旋花（ＣｏｎｖｏｌｖｕｌｕｓａｒｖｅｎｓｉｓＬ．）的染色体数目为２ｎ＝７８．     

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.