基于过程配置的MES制造数据管理方法与应用

通过研究制造执行系统中产品与工艺数据管理的应用需求,讨论了MES中的过程表达模型与过程配置方法在制造数据管理中的应用.参考XPDL等流程模型表达规范,构建了以过程为中心的制造数据信息模型.针对MES对制造过程不确定性表达的需求,给出了过程配置规则表达和配置结果求解的实现方法,设计开发了图形化的流程可视化软件模块,解决了...     

浅谈MES系统在机车电机制造中的应用

MES系统是一套面向制造企业生产车间执行层的生产信息化管理系统。可以为企业提供包括制造数据管理、库存管理、质量管理、人力资源管理、工作中心/设备管理、工具工装管理、成本管理、项目看板管理、生产过程控制、底层数据集成分析、上层数据集成分解等管理模块。电机制造运用MES系统后可以为机车电机产线打造一个便捷、可行的制造协同管理平台,提升了工艺技术、生产调度的工作效率,同时可以对现场的质量问题数据进行采集、统计、分析等。该文对MES系统的概述、市场需求、MES系统在机车电机制造中的应用等方面进行了简介。     

基于本体面向服务的统一制造资源管理

为满足制造企业内不同业务应用系统对制造资源的应用需求,建立面向服务的统一制造资源管理平台是一种有效的解决方式．本文从资源本身的结构及其管理与应用需求两方面出发,参考本体建模的思想,给出了建立面向PDM、CAPP、ERP和MES应用的统一制造资源本体模型的方法,包括资源术语、需求描述的概念化集合、动静态资源数据实体等．在此基础上,采用面向服务的信息技术,构建了一种通用的、可扩展的统一制造资源管理平台．     

制造执行系统MES——生产制造企业信息化的关键

制造执行系统（Manufacturing Execution System）是上个世纪末80年代开始形成的企业生产管理系统。它作为现代集成制造系统CIMS的关键，既是企业级管理系统ERP和过程控制系统PCS之间的信息桥梁，又是企业生产管理的执行系统，缺少了MES系统支持，ERP系统将很难充分发挥其管理功能。MES系统融合了先进的信息技术和网络技术，为实现敏捷制造和网络制造提供了先进的信息处理平台。     

MES在汽车零部件制造企业应用模式研究与实践

在分析汽车零部件制造企业对实施和应用制造执行系统需求的基础上,提出了一种多视图的汽车零部件制造企业MES应用模式,并从功能视图、过程视图、组织视图、支撑技术视图和实施视图5个方面对MES在汽车零部件制造企业的应用模式进行了研究.应用上述成果,结合某汽车空调制造企业的需求进行了实践,取得了较好的效果.     

收购DataSweep．为销售MES解决方案铺平道路

MES制造执行系统部门宣布．罗克韦尔自动化将推出它的最新产品RSAdvantagetm，它将作为factorytalkR套件的一部分，为食品、饮料、医疗设备、电子和汽车行业用户提供MES解决方案。罗克韦尔自动化干2005年11月收购了Datasweep公司。Datasweep是全球MES软件领域的著名公司，它提供高度可伸缩的解决方案，可以满足多种行业、多种领域的MES应用项目。     

钢铁企业中MES系统

本文探讨了MES系统在整个钢铁企业信息化中地位和作用，并论述了钢铁行业MES的核心系统功能。     

铝电解企业MES整体分析及其构建

分析流程制造企业面临的问题和铝电解企业生产过程,利用MES理论构建现代化的制造执行系统,实现电解铝生产数字化动态管理,提高生产管理水平．     

MES大家谈

面对日趋激烈的竞争，企业界的重要对策就是采用将制造技术与信息技术、自动化技术、现代管理技术和系统科学技术有机融合的新一代先进制造技术。对于“计划”如何下达到“生产”环节，生产过程中变化因素如何快速反映给“计划”，在计划与生产之间需要有一个“实时的信息通道”，MES(制造执行系统)就是计划与生产之间承上启下的“信息枢纽”。近年来，国外很重视MES的结构与技术研发，许多公司开发出了相应的产品，但令人遗憾的是MES在流程工业还未得到足够的认识。带着关于流程工业MES的种种问题，我们特走访了几位业内人士。     

制造执行系统(MES)实时性的改进和系统整合

在分析制造执行系统（MES）对制造企业提高竞争力、快速响应市场的重要作用的基础上,探讨了MES的定义、主要功能和在企业信息系统中的地位。针对数据信息的实时性是MES的重要作用之一,指出了当前MES运行中面临的解决实效性问题的困难和挑战;提出了基于虚拟生产线（VPL）的MES模型和通用的加工运作模型,以提高MES对数据信息的快速响应;给出了一个可行的系统整合方案。     

基于CORBA的可重构制造执行系统实现

基于可重构制造模式的思想,提出了适合制造行业的可重构制造执行系统的软件体系结构,采用该体系结构实现了MES的可重构性和可移植性。开发了适应实际功能需求的双联MES框架,实现了MES框架的重用。基于CORBA、软构件技术实现了可重构MES构件的设计和管理。分析并解决了MES构件开发过程中构件的获取、构件的设计、构件的描述与检索等关键问题。最后给出了基于UML的构件抽取过程实例。     

Magnitude estimation and categorical rating scaling in social sciences: a theoretical and psychometric controversy

This paper revisits a half-century long theoretical controversy associated with the use of magnitude estimation scaling (MES) and category rating scaling (CRS) procedures in measurement. The MES procedure in this study involved instructing participants to write a number that matched their impression of difficulty of a test item. Participants were not restricted in the range of numbers they could choose for their scale. They also had the choice of disclosing their individual scale. After the MES task was completed, participants were given a blank copy of the test to rate the perceived difficulty of each item using a researcher-imposed categorical rating scale from 1 (very easy) to 6 (very difficult). The MES and CRS data were both analyzed using Rasch Rating scale model. Additionally, the MES data were examined with Rasch Partial Credit model. Results indicate that knowing each person's scale is associated with smaller errors of measurement.     

ERP与MES集成模式方法研究

在制造业中,随着企业资源计划(ERP)的发展,越来越多的企业开始考虑ERP与制造执行系统行(MES)之间的集成.计算机技术的发展为这两个系统的集成提供了多种方法.为了研究各种集成方法在两系统集成中的应用特点,通过比较这两个系统之间的不同集成方法,在分析ERP与MFS集成信息的基础上提出了三种系统集成模式.通过一个应用实例实现了基于一种集成方法的系统集成.     

Novel self-assembled mesalamine–sucralfate complexes: preparation,characterization, and formulation aspects

Two well-known active agents, mesalamine (MES) and sucralfate (SUC), were investigated for possible utilization as fixed-dose combination product. The anti-inflammatory action of MES in association with bioadhesiveness and mucosal healing properties of SUC were considered promising for the development of a new compound containing both molecules, aimed as an improved treatment of ulcerative colitis. The present study investigates the capacity of the two active agents to interact and generate a new and stable entity via self-assembling. Spray-drying was used to co-process the two active principles from an aqueous mixture where the ratio MES:SUC was in the range 25:75, 50:50, and 75:25. The structural data (X-Ray, FTIR, SEM, DSC, and ¹H NMR) have shown that MES and SUC are interacting leading to complexes with properties differing from those of each separate active agent and from their physical blends. ¹H NMR results indicated that complexation occurred when the aqueous suspensions of drugs were mixed, prior to spray-drying. Drug–drug self-assembling was the driving mechanism in the formation of the new entity. Based on the structural data, a hypothetical structure of the complex was proposed. Co-processing of MES and SUC represents a simple and useful procedure to prepare new self-assembled compounds by valorizing the ionic interactions between the two entities. Preliminary studies with oral solid dosage forms based on MES–SUC complexes tested in vitro have shown a controlled MES release, opening the perspective of a new colon-targeted delivery system and a novel class of compounds with therapeutic application in inflammatory bowel diseases.     

面向敏捷制造的AMCS研究

在分析制造系统控制结构的发展轨迹的基础上,提出了具有分散化,集成化,智能化特征的先进制造系统模式,构建了车间级的敏捷制造系统－－先进管理控制系统（ＡＭＣＳ）的体系结构及其功能模型。ＡＭＣＳ基于现场控制系统ＦＣＳ的两层控制结构,在功能上则融合了制造执行系统ＭＥＳ的车间管理功能和ＦＣＳ的控制功能。ＡＭＣＳ与传统的ＭＥＳ不同,它不只作为一种提供解决领域问题的软件手段,而在更大程度上是一种用集成手段解决问     

MES/PET定型相变复合纤维的形貌结构及性能分析

通过制备硬脂酸甲酯/聚对苯二甲酸乙二酯(MES/PET)定型相变复合纤维,研究了MES固-液相变材料和PET支撑材料在定型相变复合纤维中的分布结构。结果表明在静电纺丝过程中MES组分作为分散相被随机地分散在PET纤维基体的连续相中,其在PET纤维中的最大负载量为50wt.%;复合纤维中的MES分子与PET分子之间没有发生化学反应,二者具有良好的相容性;MES/PET定型相变复合纤维的融化和结晶温度分别为39.84℃和27.96℃,融化和结晶焓值达到90.43kJ/kg和88.03kJ/kg;由于PET基体比MES分子具有更好的热稳定性,将PET纤维作为MES固液相变材料的支撑材料,有利于改善定型相变复合纤维的热稳定性;随着MES含量的增加,定型相变复合纤维膜呈现脆性断裂特征,其拉伸断裂强度增加。     

MES在烟机制造企业的构建

通过对DNC、ERP、PDM为代表的信息系统在烟机制造企业应用问题的梳理,发现在过程自动化与管理信息化之间存在的信息连通障碍,并构建MES来解决这一问题的功能模型,为企业实现高效的生产经营提供重要的技术支撑.     

Microembolic signal characterization using adaptive chirplet expansion

The adaptive chirplet expansion (ACE) is proposed to characterize high-intensity, transient signals from circulating microemboli. The nonnegative adaptive spectrogram based on the ACE gives a compact representation of the microembolic signal (MES) in joint-time, frequency domain. The mean instantaneous power (MIP) and mean instantaneous frequency (MIF) of MES are estimated from the adaptive spectrogram. Then, several important characteristics of MES, such as embolus-to-blood ratio (EBR), half width maximum (HWM), and embolic signal onset (ESO), are computed from the MIP, and the frequency modulation is examined in the MIF. To validate the new method, we improved the simulation model of the audio Doppler ultrasound signal. Some MESs together with a Doppler ultrasound signal from carotid blood flow are simulated in the simulation study. As a comparison, the adaptive Gabor expansion (AGE) also is implemented on these simulated signals. The experimental results of the simulation study show that the new method, based on the ACE, outperforms the AGE-based method in MES characterization. The consistent conclusion has been confirmed by the clinical study on some clinical MESs.     

Ammonium removal by a novel magnetically modified excess sludge

Disposal of nitrogen nutrient and excess sludge is a keen concern in wastewater treatment plants. This study describes a simple method of preparing an economical adsorbent, i.e., magnetic excess sludge (MES) by compounding the excess sludge with Fe₃O₄ nanoparticles. Ammonia–nitrogen removal from simulated wastewater was investigated by using the MES as an adsorbent. The MES had an adsorption efficiency of up to 90% for ammonium removal. Highly efficient separation of adsorbed ammonium on the MES could be magnetically separated from wastewater within 30 s. The operating conditions for ammonium adsorption were optimized at MES dose of 20 g/L, initial ammonium concentration of 45 mg/L and operating temperature of 298–308 K. The equilibrium data of ammonium adsorption on the MES showed a good agreement with the Langmuir isotherm, while the kinetic data were best fitted by the pseudo-second-order model. FTIR analysis indicated that various functional groups, such as hydroxyl and carboxyl groups, existed on the surface of the MES and contributed to the excellent capability for ammonium adsorption. These results suggest that the MES is a promising candidate for removing ammonium from wastewater and recycling excess sludge to ease its disposal at low cost.