一种网络化制造平台集群模式的构建

为解决网络化制造平台之间的协作和快速集成问题,形成一个集成、协同的资源环境以快速响应用户多变的需求,提出一种网络化制造平台的集群模式,构建网络化制造平台集群的总体结构,建立网络化制造平台集群的集成框架,研究集成框架涉及的信息转换和资源二次封装等主要集成技术.最后结合建筑行业中门窗幕墙制造企业的板材和条材网络化协同优化平台集群的案例对该网络化制造平台集群模式的实用性和可行性进行了验证.     

基于Internet的网络化制造集成技术

网络化集成制造作为一种新兴的先进制造模式正愈益受到重视。文中着重探讨网络化制造集成技术,即底层设备通信技术、DNC系统通信竞争、基于罗插件技术的异构数控系统集成、基于Internet的网络化制造。在此基础上构筑了网络化制造集成系统,系统经实际运行效果良好,能够满足产品远程设计制造和无纸化生产要求。     

网络化制造集成平台智能登录系统研究

为了解决面向服务的网络化制造平台集成体系中登录问题,提出了一种网络化制造集成平台智能登录系统.该系统采用智能登录服务器,既能实现集中式身份认证管理和分布式访问控制,又能保持集成平台中异构应用系统原有用户管理模块的独立性.详细介绍了其基本原理及实现机制,并给出了网络化制造集成平台智能登录系统的应用实例.     

计算机辅助可重组制造系统集成设计框架

为解决目前缺乏能够结合我国制造业现状的具体实施与应用的可重组制造系统计算机辅助系统平台问题,提出了基于面向对象开放式架构、模块化技术方法的可重组制造系统集成设计框架.分析了集成框架的规划问题,给出了体系结构.建立了集成框架的系统功能模块,并就实现每个模块所采用的关键技术进行详细阐述.依据该设计思想,结合某汽车零部件制造企业开发了集工艺分析描述、布局规划、生产调度、仿真优化、成线监控和资源管理为一体的集成系统.     

企业应用集成的开发与实现

企业应用集成是企业信息技术发展的一个主要趋势,是企业面向过程化和实现业务WEB化的基础,企业应用集成主要包括企业内部集成和企业之间集成两个方面;以正大ZDIntegratior 1.0应用集成系统为依托,介绍了企业应用集成系统开发实现的基本原理和体系结构,提出了应用集成系统的技术方案和开发方法。     

C4P集成系统在轮毂制造企业中的应用与发展

C4P（CAD／CAE／CAPP／CAM／PDM）集成技术给制造业带来了深刻的变化。C4P集成系统在轮毂制造企业中的应用,加快了企业产品的开发效率,促进了企业自动化程度的发展。本文介绍了C4P集成系统的主要技术,阐述了其在轮毂制造企业中的应用,提出了其发展方向。     

制造企业信息集成平台安全性现状及其对策

制造企业信息集成平台是一个支持复杂信息环境下应用开发、应用集成和系统运行的软硬件平台，企业的信息化依赖于这个信息集成平台。当前计算机安全性问题较为突出，因此如何保证制造企业信息集成平台的安全性是一个值得重视的问题。介绍了当前制造企业信息集成平台安全性的现状问题，提出了企业在信息化过程中应该采取的安全措施。重点指出了将安全管理制度与安全管理技术结合起来，整个企业信息集成系统的安全性才有保证。     

计算机辅助可重组制造系统集成框架设计研究

为解决目前缺乏能够结合我国制造业现状的具体实施与应用的可重组制造系统计算机辅助系统平台问题,提出了基于面向对象开放式架构、模块化技术方法的可重组制造系统集成设计框架。分析了集成框架的规划问题,给出了体系结构。建立了集成框架的系统功能模块,并就实现每个模块所采用的关键技术进行详细阐述。依据该设计思想,结合某汽车零部件制造企业开发了集工艺分析描述、布局规划、生产调度、仿真优化、成线监控和资源管理为一体的集成系统。     

网络化制造平台的多模式运行体系结构及集成技术

采用网络化制造平台的组织模式是改善企业实施网络化制造的一种有效手段,它将企业之间的协同由复杂的网状结构变成了简单的单一线性结构.结合这种组织模式,本文建立了一种网络化制造平台多模式运行体系结构,使网络化制造平台可以满足不同层次企业和行业的要求.同时,在这种体系结构下,研究了与其相适应的集成技术和相关的标准化技术,为网络化制造平台的多模式组织和运行提供一定的技术基础和实现保障.     

适用于网络化制造的制造资源模型标注语言的研究

1）分析了现代制造的生存环境，网络化制造和制造资源应用的现状，提出了结合网络化制造的先进技术，制定统一的制造资源模型和制造资源标注语言，实现集成产品开发。解决企业TQCS难题。     

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.     

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…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

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