基于消息传递的企业资源计划与制造执行系统集成接口设计

针对ERP与MES系统间集成存在数据库异构的问题,从提高集成效率、降低集成成本的角度出发,考虑ERP与MES的集成现状,应用XML的数据转换技术,提出一种基于消息传递的集成方法,并应用此方法实现ERP与MES数据集成的示例说明该方法可行有效。该方法将两系统需要交换的数据转化为消息,并按照预先定义好的架构对消息进行映射,以此来完成数据在两系统间的传递,能够很好地屏蔽ERP与MES数据库中数据的异构性,减少ERP与MES两系统间的相互干扰。     

基于 SVG 技术构建 WebGIS 研究

可伸缩向量图形(Scable Vector Graphics,SVG) 是基于XML技术的开放的矢量图形标准.本文从可伸缩向量图形(SVG)本身的技术特点出发,以构建网络地理信息系统(Web GIS)为目的,重点探讨了其丰富的图形对象、特定标志以及功能强大的消息触发和事件处理机制;并且就利用SVG技术实现网络地理信息系统(Web GIS)的功能进行了深入的研究和实现.     

基于中间件的可配置MES平台的设计与实现

针对传统MES通用性差、可集成性弱、缺乏互操作性、重构能力差和敏捷性差的缺点,利用中间件技术,构建了一个适用于离散制造行业的可配置MES平台(CMESP)。文章首先介绍了国内离散制造业的特点和适合离散制造业的MES系统构成;接着分析了可配置MES平台的设计思路和体系结构;然后详细阐述CMESP中可重用构件、中间件和代理的实现技术和方法。     

.NET窗体继承与事件处理

提出了大型应用系统中窗口继承与事件处理的一个基本实现方法,分别从窗体的继承、事件处理以及常见管理信息系统中的继承处理三个方面,阐明了构建大型管理信息系统窗体继承的基本实现模式。     

制造车间基于RFID与CEP的工件实时监测

为解决智慧制造车间工件异常情况的实时监测问题,以及追踪工件加工过程的轨迹,提出基于RFID与复杂事件处理的实时监测方法.基于信息物理融合系统理念构建智慧制造车间的感知环境和定义各类事件模型,采用基于SMURF的综合方法清洗RFID数据,应用复杂事件处理技术监听工件的异常情况,并形成工件实时状态矩阵.仿真实验证明,该系统可以实现预期功能,为智慧制造车间的主动调度提供依据.     

“克己复礼为仁”思想研究：概念、关系及路径选择

为解决智慧制造车间工件异常情况的实时监测问题,以及追踪工件加工过程的轨迹,提出基于RFID与复杂事件处理的实时监测方法.基于信息物理融合系统理念构建智慧制造车间的感知环境和定义各类事件模型,采用基于SMURF的综合方法清洗RFID数据,应用复杂事件处理技术监听工件的异常情况,并形成工件实时状态矩阵.仿真实验证明,该系统可以实现预期功能,为智慧制造车间的主动调度提供依据.     

无线射频识别系统中的事件处理机制

针对无线射频识别系统产生数据和应用系统需求信息之间的不匹配,提出使用事件处理机制处理标签识别数据并完成信息转换.在简单事件处理中,引入标签识别状态和事件驱动状态转换,将连续的标签识别数据流转换成为良序的离散数据元组序列,避免了错误和不完整标签识别数据的产生.在复合事件处理中,通过应用无关的处理规则解决射频识别数据的重复、冗余等共性问题.应用系统通过定义规则,继续对数据进行处理.通过数据处理和转换,将原始的射频识别数据转化成为满足应用系统需求的信息.最后,结合关系型数据库,给出了一种事件处理机制的轻量级实现方法.     

基于组件的可重构MES开发方法研究

本文总结了制造执行系统的发展历史、功能和存在的问题;提出了支持基于组件的可重构MES的体系结构,分析了不同类型组件CORBA组件与EJB组件的连接方法,提出了组件库功能模型,分析了MES各类组件及其之间的关系,为MES的实现及MES与已有系统的集成打下了基础。     

MES在炼钢生产中的应用分析

制造执行系统(简称MES)是应用于企业生产管理的新一代信息系统.以对一个大型钢铁厂的MES应用分析为基础,探讨MES在该企业生产中是怎样以生产订单为驱动,制定生产计划和实现生产管制,达到质量控制和成本控制的目的.     

一种面向复合事件处理的综合网管服务计算平台

为在综合网管系统中支持复合事件处理,提出了一种基于企业服务总线的综合网管服务计算平台.首先采用关系代数,定义了复合事件处理模型,然后为处理复合事件中复杂的关联关系,将事件流处理引擎引入综合网管服务计算平台,然后采用关系运算,给出了主要复合事件处理算法,包括事件选择、聚集和触发算法等,实现了事件选择、聚集和触发等复合事件处理.理论分析表明,平台中主要复合事件处理算法具有很好的执行效率.该平台能够有效的支持复合事件处理.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

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.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the