面向中小型企业的制造服务平台研究

提出和研究了一种面向中小型企业制造服务ASP平台的体系结构,在该平台上集成了一系列包括制造资源服务能力描述、制造资源服务过程配置、制造资源服务能力评价和基于合同的项目管理模式等在内的应用服务,用户可通过租用应用服务的方式在平台中处理自己的事务.针对客户的制造需求,按不同层次选择出能满足其需求的最优供应商/制造商,并在基于电子合同的项目管理模式下对该项目进行跟踪管理,直至项目完成.最后,通过在平台中进行轴加工的各项业务(如制造任务提交、电子合同谈判与签订、制造物流状态报告等)对原型系统进行实例分析,表明该系统可为中小型企业充分利用自身资源、增强快速响应市场能力提供新的途径.     

面向ASP平台的网络化制造资源应用服务研究

ASP网络化制造平台通过对相关企业提供应用服务，实现企业间的资源整合，促进优势互补，从而促进企业的竞争力和市场相应能力。研究并提出了基于ASP平台的网络化制造资源管理系统，通过对网络化制造资源管理的需求进行深入分析后，对制造资源进行分类，并提供制造资源的信息共享、使用及管理等应用服务，为企业间协作提供一个公共平台。     

基于网络化制造ASP平台项目协同管理系统的关键技术

根据网络化制造应用服务提供商(ASP)平台的特点,给出了基于ASP平台的项目协同管理系统的体系结构模型,提出了基于ASP平台的项目协同机制、项目协同决策及基于ASP平台的项目计划与控制等关键技术.     

成套电器钣金加工车间设计制造集成运行支持系统

针对多品种小批量甚至单件客户化定制生产模式下,成套电器制造企业钣金规格品种繁多、设计资料数据量大、生产加工任务重等特点以及对设计制造集成优化运行的需求,提出了一种支持钣金件从三维CAD、二维展开、工艺设计、优化排料、数控编程到数控加工整个设计制造过程信息共享与业务协同的集成运行模式,并基于面向服务架构(service-oriented architecture,SOA)建立了该模式运行支持系统的集成框架、功能结构和运行流程。最后,将该系统在重庆某成套电器制造企业进行了实际应用,取得了良好应用效果。     

基于ASP的珠三角中小企业网络化制造模式研究

针对珠三角中小企业信息化所面临的问题，对珠三角中小企业网络化制造模式进行了探讨．简单介绍了网络化制造与应用服务提供商（ASP）的概念，在对珠三角中小企业的特点进行分析的基础上，提出了一个基于ASP的珠三角中小企业网络化制造模式；并对模式中ASP平台的体系结构以及系统平台的设计原则进行了详细阐述．     

PDM框架下飞机结构件制造过程管理研究

飞机结构件制造过程的管理和控制是提高飞机研制生产效率和质量的重要环节。通过对飞机结构件的加工制造过程和管理进行分析研究,结合目前飞机制造企业制造过程的管理体系,构建了基于PDM的飞机结构件制造过程管理数字化平台,并研究了在该平台上飞机结构件的MBOM管理。     

新产品开发过程应用服务提供平台的运行支持系统

针对大多数中小型制造企业在新产品开发过程中面临的资金、技术、设备和人才等资源不足的问题,结合网络化制造的思想和应用服务提供商模式,提出了一种为制造企业提供从新产品反求、建模、设计,到加工制造一体化成套服务的新产品开发过程应用服务提供平台及其运行模式,研究和建立了支撑该模式应用的运行支持系统,包括系统的体系结构、功能结构和运行流程。介绍了该系统在中国重庆市的应用情况,给出了一个典型应用案例。     

基于ASP的制造网格资源发现模型

针对制造网格应用上的困难,基于应用服务提供商(ASP)模式,提出了基于多区域多层次树型覆盖网络的ASP平台分布的制造网格资源发现模型,在此基础上提出了自动在线组建机制及其波浪推进式的信息更新算法,剖析了模型的ASP应用模式的本质,进而给出了资源发现机制及其实现算法.与传统的典型资源发现相关模型相比,该模型在资源发现和资源更新方面更具优越性.文中还基于该资源发现模型,设计并实现了包括基于eUDDI注册中心的资源注册、资源发现、资源信息监控与动态维护以及信息交流等功能的企业信息节点原型系统.     

虚拟制造的定义与关键技术

介绍了“虚拟制造”研究和应用情况,并进行了归纳和分析。就“虚拟制造”的内涵与涉及到的关键技术进行了探讨。从企业生产全过程的角度提出了虚拟加工、虚拟生产、虚拟企业三个平台的体系结构。基于大制造概念,将可制造性分解为可加工性、可生产性、可合作性三个部分。介绍了中国国家计算机集成制造系统工程研究中心正在建立的支持企业生产全过程的虚拟制造平台框架及体系结构。     

基于ESPN的制造系统多任务可靠性研究

以一个有三台机床并同时进行多个加工任务的制造单元为例,采用扩展随机Petri网对其进行多任务可靠性建模,该模型不仅可以适应任意分布的制造系统,同时克服了传统的可靠性建模方法无法兼顾制造系统生产过程的时间动态特性.在此基础上基于Petri网行为表达式,并将矩母函数思想引入其中,则不必生成可达标识图就可通过计算模型的传递函数,进而得到整个系统的多任务可靠度,由此可以更直观地反映具有多种加工任务的整个制造系统的运行性能.     

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.