模拟留园的架构过程

把园林元素的共时性存在，理解为历时性存在。

基于OPC UA的分布式数据采集处理系统架构研究

随着物联网与互联网融合的不断深化,感知层与应用层之间的互联互通要求不断提高。针对现有数据采集系统存在的规范性、扩展性和适应性不足的问题,文章提出一套基于对象连接与嵌入过程控制统一架构(object linking and embedding for process control unified architecture,OPC UA)协议的分布式数据采集处理系统架构。对数据采集处理系统各个模块进行功能解耦和架构重组,分别介绍该系统硬件和软件架构;针对发布订阅模式下负载的特异性,提出一种改进的适用于OPC UA分布式订阅的负载均衡算法;最后在某车企实例验证该系统架构。结果表明,基于OPC UA的分布式数据采集处理系统数据采集处理效果良好,证明了该系统架构的可行性及有效性。

业务过程协同中数据恢复策略建模及分析

为了确保实施的正确性和一致性,需要对业务过程协同进行建模和分析,但现有的工作鲜有关注于从架构的视角和数据的层次来对其进行讨论。为此,首先提出了一种"代理端+盟主端"业务过程协同架构;然后通过对该协同架构进行分析,提出了一种业务过程协同的数据恢复通用模型;最后基于该通用模型,提出了数据恢复策略模型,以此为基础提出了五种数据恢复策略并采用随机Petri网对其进行建模与仿真。实验结果表明,采用最短队列随机恢复策略能够使得业务过程协同应用在协同中确保具有高的系统吞吐量、快的响应时间及低的拒绝率。

B/S架构下SQL Server数据导出方法的研究

B/S架构下SQL Server数据导出到Excel中进行二次处理是Web系统常见的功能要求,试图通过设计并调用SQL Server的存储过程来完成数据的导出,该种方法避免了其他方法所遇到的技术问题和权限问题,达到了良好的效果。

基于机床信息的加工过程刀具磨损状态在线监测

为实现刀具磨损状态的在线监测,提高监测系统的实用性,提出一种基于机床信息的加工过程刀具磨损状态在线监测方法。采用OPC UA通信技术在线采集与存储数控机床信息,得到与磨损相关的机床内部过程信息,并基于这类信息与相应的刀具磨损信息,利用卷积神经网络建立了刀具磨损状态识别模型。应用案例证明了该方法的监测性能,与其他传统监测方法相比,该方法更适用于实际的生产加工。

Synthesis of FER zeolite with piperidine as structure-directing agent and its catalytic application

The synthesis of ferrierite(FER)zeolite using piperidine as an organic structure‐directing agent was investigated.X‐ray diffraction,X‐ray fluorescence,N2‐adsorption,and scanning electron microscopy were used to characterize the crystal phases,textural properties,and particle morphologies of the zeolite samples.The crystallization behavior of the FER zeolite was found to be directly related to crystallization temperature.At150?C,pure FER phase was observed throughout crystallization.At160–170?C,MWW phase appeared first and gradually transformed into FER phase over time,indicating that the FER phase was thermodynamically favored.In the piperidine‐Na2O‐H2O synthetic system,alkalinity proved to be the crucial factor determining the size and textural properties of FER zeolite.Furthermore,the obtained FER samples exhibited good catalytic performance in the skeletal isomerization of1‐butene.

基于OPC UA技术的数据采集与信息系统设计

随着焊接车间自动化的不断发展,焊机种类更加丰富,对焊机的工作参数采集、工作状态监控越来越重要。不同品牌和型号的焊机导致车间内的通信协议繁多。为实现对焊机工作状态的数据采集与监控,以对象链接与嵌入的过程控制统一架构(OPC UA)为核心技术,利用其数据传输安全性强、可集成地址空间等优势,设计并实现了焊接车间的数据采集与监控系统。同时,创新性地将采集到的数据应用到制造执行系统(MES),实现了在MES监视焊机运行情况的功能。首先,采用C++语言搭建OPC UA服务器,实现采集设备的工作数据。其次,在JAVA平台开发了OPC UA客户端,实现访问服务器将采集的数据进行可视化读取、修改、监控和存储等功能。最后,该系统在焊接车间实时采集电压和电流数据进行测试与验证,证明其满足目标需求。因此,基于OPC UA的数据采集系统能满足焊接车间的数据采集和监控需求,对推动车间智能化管理有借鉴意义。

An agent-based service-oriented integration architecture for chemical process automation

In reality, traditional process control system built upon centralized and hierarchical structures presents a weak response to change and is easy to shut down by single failure. Aiming at these problems, a new agent-based service-oriented integration architecture was proposed for chemical process automation system. Web services were dynamically orchestrated on the internet and agent behaviors were built in them. Data analysis, model, optimization, control, fault diagnosis and so on were capsuled into different web services. Agents were used for service compositions by negotiation. A prototype system of poly(ethylene terephthalate) process automation was used as the case study to demonstrate the validation of the integration.

面向IIOT的数字化车间数据通信研究及应用

为了满足工业制造车间的数据智能化采集需求,在工业物联网(IIOT)体系结构中应用监控与数据采集(SCADA)系统,通过IIOT的支撑实现设备、人、订单计划的有机互联,采用过程控制统一架构(OPC UA)协议增强了数据通信的规范性,提高了模型的可重用性和扩展性,为制造执行和企业决策以及大数据应用提供数据支撑。

Research on Flexible Manufacturing System in Mechatronics Professional Comprehensive Training

According to the characteristics of flexible manufacturing systems, the article describes the equipment components and hardware architecture of flexible manufacturing systems in school. Taking welding assemble process as an example to elaborate production process automation, the paper put forward a flexible manufacaxring system combined with laboratory equipment and various grades, professional knowledge and teaching characteristics and differentiated teaching programs, the creation of the laboratory project was planned and implemented to specific engineering training programs, so that students has been expanded in the depth of expertise and breadth, experimental skills and innovation capacity has been improved, the teaching effect has also been significantly improved..

基于OPC UA和样本熵的工业入侵检测算法研究

工业4.0时代,工业控制系统面临千变万化的网络入侵攻击。针对以工业协议为主要入侵手段的现状,提出了1种基于对象链接与嵌入的过程控制统一架构(OPC UA)协议结合样本熵的工业控制系统入侵检测算法。首先,对基于OPC UA所有的请求操作和响应操作进行标记。然后,分别计算单位时间内回复信息熵和请求信息熵,形成1个单位时间内的二维向量。最后,将时序连续的二维向量形成1个时间序列,用样本熵算法检测时间序列的异常。其中,采用欧氏距离度量2个二维向量之间的距离。仿真试验结果表明,针对4种原理不同的攻击手段,相较于传统的入侵检测算法差分整合移动平均自回归(ARIMA)模型和基于白名单规则的检测算法,所提出的检测算法检测率最高。该研究为利用无监督学习算法检测工业入侵的研究提供了新的思路。

基于OPC UA的烟叶成品下线管理系统分析与设计

从烟叶的收购到生产出成品,要经过五大工序。由于生产链条长、生产分散、信息多源异构等问题,造成生产线上下游信息脱节和不透明。在烟叶成品下线环节,指标数据存储于实时监控系统、业务数据存储于生产管理系统,无法做到实时、有效的数据交互。因此,提出在监控系统和生产系统之间搭接桥梁———对象链接与嵌入的过程控制统一架构(OPC UA)客户端,以获取、过滤实时有效数据。未建立OPC UA时,成品下线业务由人工干预,需手动打印成品下线标签且无法全面填补业务数据,劳时费力、工作繁重。建立OPC UA后,可实时从监控系统中获取下线时间、成品烟箱重量等业务数据传递到生产系统,从而实现烟叶数据特征分析、数据过滤、标签打印等业务,为烟叶成品下线环节提供实时、精准、全面的数据支持。通过对某烟草企业复烤业务的深入研究,构建成品下线管理系统。该成果可为中间件技术的技术落地、分布式方向上的工控系统提供借鉴和参考。

软件过程发展及研究

回顾了软件过程生命周期模型发展的历史，并提出了目前软件过程理论和实践中存在的问题，针对这些问题，提出了软件过程架构的概念和软件过程演化的模型。

Towards a self-adaptive service-oriented methodology based on extended SOMA

We propose a self-adaptive process （SAP） that maintains the software architecture quality using the MAPE-K standard model. The proposed process can be plugged into various software development processes and service-oriented meth- odologies due to its explicitly defined inputs and outputs. To this aim, the proposed SAP is integrated with the service-oriented modeling and application （SOMA） methodology in a two-layered structure to create a novel methodology, named self-adaptive service-oriented architecture methodology （SASOAM）, which provides a semi-automatic self-aware method by the composition of architectural tactics. Moreover, the maintenance activity of SOMA is improved using architectural and adaptive patterns, which results in controlling the software architecture quality. The improvement in the maintainability of SOMA is demonstrated by an analytic hierarchy process （AHP） based evaluation method. Furthermore, the proposed method is applied to a case study to represent the feasibility and practicality of SASOAM.