波谱分析滤波器的算法研究及LabVIEW实现

通过对波谱滤波器的分析，提出了波谱滤波器组的优化算法．在LabVIEW环境下对算法进行了仿真，结果表明了该算法的正确性．该算法使运算量大大减少，为设计实际系统提供了依据．     

停车诱导系统下中心型路径诱导算法的改进与应用

在应用Dijkstra算法的前提上,建立一个适用于城市交通路况综合评测的路网模型．结合该模型,对Dijkstra算法进行改进,提出了一种中心型路径诱导算法,并应用到停车诱导系统中．将该算法和经典Dijkstra算法进行比较,结果表明该算法能及时适应路网变化,迅速做出新的路径选择．     

一种基于文件共享的分布式算法

针对传统集中文件共享方式的弊端，提出了一种行之有效的分布式算法．从主机选择、块选择以及阻塞算法这3个方面描述了该算法的基本思想．实验证明了该方法的有效性和正确性．     

高次B样条曲线的象素级生成算法

提出了一个高次Ｂ样条曲线的绘制算法．该算法首先对高次Ｂ样条曲线降阶,然后采用通用的象素级生成算法来生成Ｂ样条曲线．由于该算法考虑了误差问题,因此是一个有效通用的算法     

多叉树Huffman算法

改进Huffnan算法，提出了多叉树Huffnan算法．理论分析表明该算法优于常规的Huffnan算法，其平均码长已接近信源的熵函数值，且其解码速度快．将其实现用于文本压缩，压缩比大约为3：1左右．该算法已长期用于众多产品中，取得了良好的效果。     

基于遗传粒子群的图像融合算法及应用

为改善传统图像融合方法对细节信息的丢失,提出了一种基于遗传粒子群算法（geneticalgorithmofparticleswarmoptimization,GAPSO）的图像融合方法,该算法应用于像素级的图像融合,使图像融合问题归结为最优化问题．该算法结合遗传算法和粒子群算法的优点,对标准粒子群算法进行了改进,将交叉与变异算子引入到标准粒子群算法,提高了该算法的收敛性能和全局求解能力．实验结果表明,该算法获得的评价指标都优于遗传算法和PSO算法,且融合图像较好地从源图像中提取了有用信息,提高了融合质量．     

一种新的数组排序法

提出一种新的数组排序法，分析了该算法在最坏情况下的计算复杂度。该算法经C．A．R．Hoare算法要快，操作简便。     

参数曲面上投影曲线的直接插补算法

用传统方法加工复杂曲面时，由于计算机数控系统的轨迹控制能力不强，过分依赖数控编程，因而带来很多问题．针对这种情况，文中针对参数曲面上以投影方式形成的空间曲线轨迹，提出了一种直接插补算法．应用该算法，可以实现对参数曲面局部加工区域内生成的刀轨的直接插补运算．该算法的实现提高了数控系统的轨迹控制能力．文中最后给出了一个曲面局部加工实例来对算法进行验证．仿真结果表明，给出的算法简单、可行而且有效．该算法也可以推广应用于曲面的整体加工．     

多变量时变系统的自适应控制算法

本文针对多变量时变未知系统提出了一种自适应控制算法，该算法对全封闭式循环系统是稳定的．同时给出了所提算法的性质，得到了该算法可优化系统动态、稳定系统及实现关于给定信号的全跟踪的结果．该算法避免了多项式算子矩阵的伪交换，且计算量小，很容易在实际系统中实现．     

修正的传播算子方位估计算法及去相关性能分析

将数据共轭重排的方法引申到传播算子算法中，提出了修正的传播算子方位估计算法．从理论上论证了这种引申的合理性．通过理论分析和数值仿真，证明了该算法在快拍数有限时可明显提高信号的方位估计性能．在不增加运算量的条件下，该算法明显优于MUSIC（Mumple Signal Classfication）算法．     

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).     

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.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.