面向MES的柔性装配过程物料追踪方法研究

针对机械产品柔性装配过程中物料追踪困难的问题,文中首先进行了物料追踪要素分析,建立了工艺配置导向的产品追踪BOM扩展模型;在此基础上,重点研究了一种面向MES的物料追踪方法,即在MES相关子模块提供数据支持的前提下,建立一个工序级物料追踪的通用流程,以工序为基本单元对装配全过程进行物料跟踪;最后通过实例验证上述方法的实用性和可行性。     

Prospect options of CO2 capture technology suitable for China

Reviewing the progress of CO₂ capture and storage (CCS) technology, the main obstacles and the potentials of greenhouse gas control in China are identified. An important point can be drawn is that the innovative energy systems, besides simple implementation of existing technology, are needed for CO₂ control in China. On the basis of integration principle of energy utilization and CO₂ separation, several innovative energy systems, including chemical-looping combustion with CO₂ capture, a partial gasification with O₂/CO₂ cycle, and a polygeneration system with CO₂ capture, are introduced. With synergetic integrating CO₂ into chemical energy conversion and utilization processes, these systems may make breakthrough in CO₂ capture with less or even zero energy penalty. Finally, according to the specific issue of China, a new scenario of Energy Network, which composed of energy source, transportation chain, and terminal user, is recommended for sustainable development in China.     

The methionine precursor dl-2-hydroxy-(4-methylthio)butanoic acid protects intestinal epithelial barrier function

dl-2-hydroxy-(4-methylthio)butanoic acid (HMTBA) is a source of dietary methionine (Met) that is widely used in poultry nutrition. We have previously shown that HMTBA is preferentially diverted to the transsulfuration pathway, which gives antioxidant metabolites such as taurine and glutathione. Therefore, here we hypothesize that this Met source can protect epithelial barrier function in an in vitro model of intestinal inflammation of Caco-2 cells. The results show that HMTBA prevents the increase in paracellular permeability induced by H₂O₂ or tumour necrosis factor-α. This effect can be attributed to the increased production of taurine and reduced glutathione. Similar results were obtained for dl-Met, although the protective role of the amino acid was less pronounced than that of the hydroxy analogue. In conclusion, the diversion to the transsulfuration pathway means that this Met precursor is of greater value than previously thought, due to its capacity to improve intestinal homeostasis and the quality of poultry products destined for human consumption.     

面向MES的装配CAPP系统设计

制造执行系统(MES)与装配CAPP(CAAPP)系统是解决制造企业产品多样性的重要手段,也是目前信息化发展的重要环节。但目前对两者之间集成的研究一直很少涉及,致使工艺设计与现场管理间不能很好衔接。阐述了MES系统与CAAPP系统间集成的必要性以及发展现状。针对MES的需求建立了以PDM为平台的CAAPP系统的体系架构,提出了可行的数据生成与交互方法。为提高CAAPP应用水平提供了有效途径。     

Flash技术在MES生产流程图中的应用

讲解MES生产流程图Flash应用架构,并以一个实例进行了详细说明.     

脂肪酸甲酯磺酸盐的最新研究进展

简要归纳了脂肪酸甲酯磺酸盐（MES）的性质,详细叙述了MES的制备机理与国内外最新研究进展,并结合当前中国资源紧缺等具体情况,对MES的发展前景进行了展望。     

面向MES的炼油厂调度建模策略研究

基于建模平台PS(Production scheduler),以炼油厂作为研究对象,以效益类和绩效类目标结合的多目标规划建立润滑油调度模型,并用分支定界法、线性规划方法进行求解;在包含性质约束的汽油调和模型中,以路径层和性质层分解的策略分别建立混合线性规划模型和不包含整型变量的非线性规划模型,在性质层模型求解中运用SLP(连续线性规划)方法求解.建模、求解和仿真结果证明,以线性规划为基础、对象化方法为思路、结合分层次的分解策略建立离散时间调度模型的多目标规划方法,适用于建立炼油厂各关注重点的局部模型和全厂模型,结合分支定界和SLP的线性规划求解策略,适用于大规模调度模型的求解.     

MBD模式下的数字化航空维修

文章提出了基于全三维的航空维修手册的新的维修信息表达思路,论证了三维的表达方式的诸多优点,提出了维修企业维修知识的应用及管理模式,以方便使用人员查找使用,提出了将制造企业使用的MES系统引入航空维修中,以解决维修过程中经常出现维修遗漏的问题。     

流程工业MES体系结构及模型设计

对流程工业MES(Manufacturing Execution System)系统建模的层次、目标需求、模型特征等概念进行讨论,对现有的建模方法和模型体系结构进行比较归纳,分析其技术特点和存在的问题,并在此基础上指出流程工业MES系统体系结构和模型集成设计的发展方向,以供企业MES系统设计参考.     

中药企业MES系统的研发及应用

该文针对中药制造企业计划层与控制层相互脱节的现状,即决策管理层的管理信息如ERP和底层的控制系统(DCS)处于相对独立的状态,在对中药制造企业资源管理现状分析的基础上,利用过程运行信息,以产品产量、质量、节能降耗、过程优化等为目标,研究适合中药制造企业的MES系统,并针对某中药企业做应用研究,证实其有效提高了企业管理水平,并降低能耗.