江苏龙虬庄新石器遗址环境考古研究

龙虬庄新石器文化遗址被列为１９９３年中国十大考古发现之一。根据＾１４Ｃ测年、器物排比法断代、孢粉、粒度、氧化物和磁化率等鉴定分析,探讨了遗址区古生民生存的环境。分析表明,龙虬庄地区在经历新仙女木寒冷期之后迎来了全新世暖期环境,１００００－７０００ａＢＰ间气候进入适宜期,但当时湿润程度尚不及此后７０００－６０００ａＢＰ间的新石器时期,当时 冬春季节应当有较大的风沙沉积。６３００ａＢＰ前后的气温可能更     

安固里淖全新世湖面变化及其环境意义

地貌证据和钻孔沉积特征分析表明,安固里淖全新世湖面变化分为４个时期：湖面快速上升时期（１００００～７３００ａＢＰ）,高湖面时期（７３００～６２３０ａＢＰ）,湖面快速下降时期（６２３０～５３００ａＢＰ）,湖面波支动性下降时期（５３００ａＢＰ以来）,其中高湖面达到现代湖面以上２８ｍ的位置,代表全新世气候最暖湿的时期。安固里淖全新世湖面变化及其反映的气候变化,与邻近地区具有良好的对应关系,其高湖面与中国     

t-PA在昆虫细胞中的表达

将含完整阅读框架的人ｔ－ＰＡ（ｔｉｓｓｕｅ－ｙｔｐｅ ｐｌａｓｍｉｎｏｇｅｎ ａｃｔｉｖａｔｏｒ,ｔ－ＰＡ）ｃＤＮＡ克隆至昆虫细胞表达转移载体ｐＢａｃＰＡＫ８中,获得重组质粒ｐＢａｃ－ｔＰＡ。应用脂质体共转染法,将ｐＢａｃ－ｔＰＡ和线性化杆状病毒ＢａｃＰＡＫ６ ＤＮＡ共转染Ｔｎ－５Ｂ－１昆虫细胞。经空斑筛选获得１１株重组病毒。经ＰＣＲ鉴定与生物活性测定,获得一株高效表达ｔ－ＰＡ的重且病毒ＢａｃｔＰ     

中国全新世的环境演化

全新世是地球历史中全新的一页，年龄为１０×１０３年，测定全新世年龄的最佳方法为１４Ｃ法，按照环境演化综合分析，全新世可以分为：前北方期（９３００ａＢＰ以前）、北方期（７５００－９３００ａＢＰ）、大西洋期（５０００－７５００ａＢＰ）、亚北方期（２５００－５０００ａＢＰ）、亚大西洋期（２５００ａＢＰ至现在）．全新世环境的主要特征是：现代人使用的新石器不断革新；全球性的大冰盖已经消逝，只有一些高山冰川和极地冰川，所以称为冰后期；海平面有多次的缓慢升降，总的趋势是不断升高；现代地壳运动是三大板块继续移动，并有多次的地震和火山喷发期；构造地貌和气候地貌的三大地貌单元已经形成；现代人的出现是全新世环境演化的最基本特征。这些特征的相互作用，构成了全新世的环境演化。     

白龙江流域全新世泥石流与环境演变的初步研究

根据黄土－古土壤沉积序列研究和野外考察资料并结合放射性＾１４Ｃ测年,初步确定嘉陵江上游白龙江流域全新世泥石流共分三期,时代分别为７０００－６０００ａＢＰ、４０００ａＢＰ和２０００ａＢＰ。研究表明,泥石流频繁爆发于古气候由寒冷向温暖转换的波动时期。     

烧结温度对PSBN铁电陶瓷介电性能的影响

用普通的电子陶瓷工艺制备了ＰｂＯ－ＳｒＯ－ＢａＯ－Ｎｂ２Ｏ５（ＰＳＢＮ）系统民陶瓷，研究了ＰＳＢＮ系统铁电陶瓷的介电性能与烧结温度的关系，ＸＲＤ分析表明：ＰＳＢＮ系统铁电陶瓷的主晶相是Ｐｂ０．７Ｂａ０．３Ｎｂ２Ｏ６（ＰＢＮ）、Ｓｒ０．５Ｂａ０．５Ｎｂ２Ｏ６（ＳＢＮ）和Ｂａ０．２７Ｓｒ０．７５Ｎｂ２Ｏ５．７８（ＢＳＮ），将这一复杂的化学系统看作三元系固熔体，其中ＰＢＮ、ＳＢＮ和ＢＳＮ各相比例随烧结温     

控制细胞内游离[Ca^2＋]的螯合剂BAPTA衍生物的合成及结…

控制细胞内游离〔Ｃａ＾２＋〕用的七种螯合剂ＢＡＰＴＡ衍生物已合成成功，其中对〔Ｃａ＾２＋〕低亲和力的５，５’－二硝基ＢＡＰＴＡ及中等亲和力的５，５‘－二溴ＢＡＰＴＡ，５－溴－５’－甲基ＢＡＰＴＡ已分别应用于控制不同体系的〔Ｃａ＾２＋〕测定。本文详述它们的合成方法，性能及苯环上不同取代基对Ｅｘ、Ｅｍ、Ｋｄ值影响的规律性。     

邻苯二胺电聚合膜中Ni的掺杂及其催化作用

采用二甲基甲酰胺、水杨醛、氨基乙酸、乙酸改性的聚邻苯二胺膜电极（ＰＯＤＢ）配合Ｎｉ（Ⅱ）,形成ＰＯＤＢｄ－Ｎｉ（Ⅱ）,ＰＯＤＢｈ－Ｎｉ（Ⅱ）,ＰＯＤＢｅ－Ｎｉ（Ⅱ）,ＰＯＤＢａ－Ｎｉ（Ⅱ）电极。红外光谱显示,Ｎｉ（Ⅱ）是由于改性物质和ＰＯＤＢ以酰胺的形式结合,从而引入更多的含孤对电子的元素,配合到ＰＯＤＢ膜中去的。在ＨＣｌ溶液中（ｐＨ＝３）,ＰＯＤＢａ－Ｎｉ（Ⅱ）的配合稳定性最好。掺杂Ｎｉ的ＰＯＤＢ对Ｏ２和抗坏血酸（Ｈ２Ａ）有电催化还原和氧化的作用。对Ｈ２Ａ的催化氧化属于平行催化机理,电极反应受Ｈ２Ａ向电极表面扩散的控制。     

青藏高原：全球气候变化的驱动机与放大器──Ⅰ 新生代气候变化的基本特征

除周期性气候波动外，新生代气候变化的基本特征是阶梯状气候变冷、波动幅度的不断增加和气候波动周期的转变。深海氧同位素记录表明新生代曾发生至少三次快速变冷事件，它们分别发生在３６，１５和２．４ＭａＢＰ前后。根据来自北大西洋的深海氧同位素记录，第四纪气候变化的趋势是波动幅度增加、频率降低。Ｂ／Ｍ界限附近，气候波动周期由４１ｋａ转变为１００ｋａ。黄土高原上黄土地层与磁化率研究揭示，现代东亚季风出现于２．４Ｍａ前，并于１．１和０．６ＭａＢＰ前后两度加强，现在的季风环流形势形成于０．６ＭａＢＰ，米兰柯维奇理论不能解释上述新生代气候的阶梯状变冷、第四纪气候的阶段性和东亚季风的形成及加强，因此除轨道因素外，还有别的因素控制气候变化。     

5000年来秦皇岛至成山角海岸新构造运动分析

在列举全新世渤海海岸３１００－３９００ａＢ．Ｐ和５００－６００ａＢ．Ｐ．两期海平面遗迹资料的基础上，分析了沿海岸走向同期异地古少平面遗迹高度的变化规律，发现５０００ａ来郯庐断裂的活动对古海平面遗迹分布高度变化的影响，从而讨论了渤海海岸带的新构造特征。     

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.