碰撞危险区域(DAC)的原理及避碰的可靠性分析

介绍了ＢＲ－３４４０系列ＡＲＰＡ中的ＤＡＣ（碰撞危险区域）产生的基本原理，并分析其在船舶避碰中应用的可靠性，简要说明了使用ＤＡＣ功能的注意事项。     

露天矿分期开采CAD优化设计系统

本文应用优化技术和ＣＡＤ技术，开发出了露天矿分期开采ＣＡＤ优化设计系统。该系统包括如下子系统：露天矿分期境界优化与ＣＡＤ设计；开拓运输系统优化与ＣＡＤ设计；扩帮过渡优化设计；ＣＡＤ生产过程模拟；通用采剥计划。     

应用CAD技术中的若干问题之浅见

结合广西应用ＣＡＤ技术的现实，简要分析了当前ＣＡＤ技术的发展现状和应用存在的问题，分析了当前ＣＡＤ技术的特点和应３采取相应的政策，并对ＣＡＤ技术的进一步开发使用提出了三点展望。     

进给箱传动方案设计的智能CAD

综合运用人工智能理论及专家系统与现代ＣＡＤ技术，成功地开发了龙门铣床进给箱传动方案设计智能ＣＡＤ系统ＦＢＳＩＣＡＤ．通过对传动方案设计的分析，提出了系统设计的基本原则和方法，并给出了该系统的控制结构与功能。     

CAD／CAM在冶金生产中的应用

由四级计算机组成的计算机集成制造系统（ＣＩＭＳ）实现了ＣＡＤ、ＣＡＭ和ＣＡＰ。系统也有与之相适应的ＣＡＰＭ。借助于计算机系统和工艺、设备的综合能力，也是在ＣＡＤ／ＣＡＭ的基础上，实现了ＦＭＳ，这使得在大生产过程中能充分满足每个用户的订货要求。系统的ＭＲＰⅡ对前工序的原料供应以ｊｕｓｔｉｎｔｉｍｅ的原则进行了规划。本系统还在向更高层次的ＣＩＭＳ发展。     

论冶金行业CAD技术的开发与应用

ＣＡＤ技术的开发应用，对冶金行业的进步具有重要重义。ＣＡＤ的未来发展应建立在开放的网络的集成化系统上，大面积普及ＣＡＤ技术。本文论述了ＣＡＤ发展要点以及成功应用的必要保证条件。     

微机CAD系统开发中集成技术的应用与研究

叙述微机ＣＡＤ系统开发中存在的问题和集成化的要求，介绍微机ＣＡＤ系统开发中实用的集成技术。这些技术在铁路站场ＣＡＤ系统（ＴＺＳＨＸ）中得到了成功的应用。     

CAD技术与SPICE系统

ＣＡＤ是计算机辅助设计之意．ＣＡＤ技术的推广应用是设计领域的一场革命．ＣＡＤ技术自６０年代由美国麻省理工学院发明以发来，以锐不可挡的趋势在全世界迅猛发展，广泛渗透到各个领域．ＣＡＤ在各行各业的应用都取得了显著的经济效益．ＣＡＤ在电子线路和大规模集成电路设计方面的应用和发展更为突出，自７０年代美国加州大学开发的电子线路ＣＡＤ──ＳＰＩＣＥ系统以来，电子技术有了突飞猛进的发展．近三十年的应用表明，与其它线路ＣＡＤ工作站相比，ＳＰＩＣＥ系统仍保持它的先进地位．     

系统化的机械产品计算机辅助设计（SCAD）方法的研究

通过将系统化的工程设计方法与ＣＡＤ技术相结合，提出系统化的计算机辅助设计（ＳＣＡＤ）方法。并研究了ＳＣＡＤ所包含的四个阶段－计算机辅助产品规划（ＣＡＰＲＰ）、计算机辅助概念设计（ＣＡＣＤ）、计算机辅助具体化设计（ＣＡＥＤ）和计算机辅助详细设计（ＣＡＤＤ）的一些具体实施方案，形成了ＳＣＡＤ技术的基本理论框架。     

鲫鱼在强直流电场中的行为初探

鲫鱼在强直流电场中的行为初探蔡厚才（南麂列岛国家海洋自然保护区管理局）吕炜泓，钱小荣，陈志远（浙江水产学院）ＡＰＲＥＬＩＭＩＮＡＲＹＳＴＵＤＹＯＦＣＲＵＣＩＡＮＣＡＲＰＢＥＨＡＶＩＯＵＲＵＮＤＥＲＴＨＥＳＴＲＯＮＧＤＣＦＩＥＬＤＣａｉＨｏｕｃａｉ（Ｎ...     

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.