快速自动安平激光扫平仪设计及误差分析

基于扫平仪自动安平的原理，设计了一种电子水泡水平传感器，并采用分段P调节的控制思想，研发了一套合适的控制方法，实现了扫平仪的自动安平，达到了仪器设计的精度要求．此外，还优化了激光扫平仪结构的总体设计方案，完成了仪器在较大安平范围内快速自动安平功能．并对仪器误差来源进行了分析与讨论．测试结果表明：该扫平仪在-10°～＋10°的角度调整范围内达到了10的安平精度，且自动安平时间少于15S，达到了高效率、高精度的设计要求．     

遥感影像配准中控制点的自动提取

针对遥感影像的处理应用中，传统的手工选取控制点速度慢、精度低和强度大等缺点的问题，提出了一种基于影像灰度和影像特征混合自动提取控制点的新方法。在进行控制点的自动提取时，该方法速度快、错误匹配率低、精度高。方法内容包括特征点提取、构造影像金字塔以及基于金字塔数据结构的互相关匹配。     

浅谈Geolord-AT空中三角测量

空三加密是摄影测量生产中的关键步骤,它利用少量的地面控制点来计算一个测区中所有影像的外方位元素和所有加密点的地面坐标。Geolord-AT自动空中三角测量系统就是一套用来解决利用少量外业控制点来加密内业控制点的软件。本文介绍了Geolord-AT自动空中三角测量系统及其空三加密作业方法,并通过自身实践工作经验论述了该测量系统的特点以及生产过程中应当注意的问题。     

介绍一种测量大电阻的新方法

针对一般数字万用表测量200MΩ以内大电阻误差大、200MΩ以上大电阻无法测量的缺点，利用其输入电阻大、直流电压测量范围大的优点，研究出了能较准确测量200MΩ—几十GΩ大电阻的新方法，介绍了其测量原理。并对该法的测量范围和误差进行了分析。     

电缆绝缘护套厚度和外形尺寸自动测量系统的研制

针对通用实验方法测量电线电缆类产品测量效率低、误差大、受人为因素影响大的缺点,提出利用图像识别技术,进行电缆绝缘护套厚度和外形尺寸自动测量系统.首先介绍系统结构、视频采集卡DH-HV3102UC-T的特性和对系统的要求,然后通过Visual Basic语言,实现放大倍数测定和样品测量的流程和算法.实验结果表明,设计的测量系统检测一个待测样品仅需2min,测量的最大误差控制在5μm以下,大大提高了测量的效率和精确度,识别准确率大于98%.     

一种准自动多传感器图像配准方法

针对现有多传感器自动配准方法存在的应用局限性，提出了一种人机交互式粗—精结合的准自动配准方法．先选取少量控制点进行粗匹配，在此基础上利用整体图像信息进行精匹配．该方法将基于特征和基于区域的配准方法进行了有效结合，从而保证了配准的精度和效率，取得了令人满意的效果．此方法可以作为现有的自动配准方法的补充．     

智能斜管微压计在矿井通风中的应用

针对职能斜管原设计中存在的问题,对设计进行了改进.智能斜管微压计在原有仪器的基础上增加了液面读取传感器、仪器水平传感器、单片机控制单元、LCD显示器、键盘和通信接口,使仪器能自动读取液面高度,自动显示仪器水平高度,自动显示数据和存储数据,与上位计算机通信,能实现压力的无人值守和自动测量,提高了测量精度.介绍了智能斜管微压计的结构原理及其软件流程框图.     

基于二维矢量地图自动构建DEM方法研究

针对城市三维GIS研究中涉及到的利用矢量地形图建立数字高程模型（digital elevation model-DEM)问题进行了研究与实验，提出一种基于高程控制点自动聚集、集合内邻近控制点协作来自动识别等高线高程的数据采集方法，并将该方法应用于三维GIS平台的开发，取得了较好的实验效果。     

便携式动脉硬化无创检测仪设计

针对现有动脉硬化检测仪价格昂贵和体积大的缺点,设计了一种基于ARM和WinCE的便携式动脉硬化无创检测仪,并对该仪器进行了临床评估实验。该仪器以嵌入式系统为硬件平台,通过信号测量电路获取桡动脉和肱动脉脉搏波信号,并将信号送入ARM处理器。根据动脉弹性腔理论和示波法原理,基于LabVIEW for WinCE设计系统软件以实现脉搏波信号分析,并计算出11项动脉硬化评判因子,然后根据这些因子自动评判受试者的动脉硬化程度。临床评估实验结果表明：该仪器能准确评价受试者的动脉硬化程度,具有较好的稳定性和可靠性,其稳定性最大相对标准误差为4.37%,与对照仪器测量结果的相关系数均高于0.85(P<0.001)。     

一种利用霍尔效应测量螺线磁场的新方法

给出了一种利用霍尔效应测量螺线管磁场的新方法：用数字电压表取代电位差计等诸多仪器测量霍尔电热差，进而计算出通电长直螺线管内轴向磁场的分布，实验证明，该方法测量精度高、稳定性好，克服了以往测量方法的缺点，极大地提高了实验精度和实验效率。     

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.