面向对象的生产作业计划系统框架设计

在分析了机械制造企业中生产作业计划系统工作原理的基础上,以生产车间为对象,利用面向对象技术,提出了一种面向对象的生产作业计划系统的模型.     

单件车间生产作业计划模拟模型生成器研究

针对中小批量车间生产作业计划问题，集成Ｖｉｓｕａｌ Ｆｏｘｐｒｏ５．０与Ｓｉｍａｎ３．５１开发了一个模拟模型生成器。它可以用于生成生产作业计划的模拟模型，还可以用于生成一个初始可行的生产作业计划方案。文中研究了它的功能、原理和实现思路。     

供应链企业ERP生产管理数据互联互通的研究

讨论了供应链环境下企业间的关系,阐明生产管理数据互联互通的重要性,对ERP中生产管理数据交互的数据类型进行分析,论述了主生产计划、物料需求计划和生产作业计划实现信息共享的原因,进而详细研究了这三种计划的数据接口和映射规则.最后,应用XML Web服务技术,实现了主生产计划的交互,证明了生产管理数据互联互通的可行性.     

招投标后道班养护生产考核的探讨

要提高公路养护质量,必须对招标段进行生产考核.提出应由好路率的单控改为好路率的指令性作业计划的双控,使路况生产作业计划与提高好路率有机的结合,作业计划的控制按编制人数和计划出工率来控制总工日,加强了定额管理和指令性作业项目,能按技术标准进行作业,克服以往的考核单以好路率为主,不考虑人的因素,避免了投入劳动量差别过大和劳动报酬分配上的不均现象.     

对道班养护生产考核的探讨

要提高公路养护,开发对道班进行生产考核，提出应由好路率的单控改为好路率和指令性作业计划的双控，使路况生产作业计划与提高好路率有机地结合，作业计划的控制按编制人数和计划也工率来控制总工日，加强了定额管理和指令性作业项目，能按技术标准进行作业，克服以往的考核单以好路率为主，不考虑人的因素，避免了投入劳动量差别过大和劳动报酬分配上的不均现象。     

招投标后道班养护生产考核的探讨

要提高公路养护质量，必须对招标段进行生产考核。提出应由好路率的单控改为好路率的指令性作业计划的双控，使路况生产作业计划与提高好路率有机的结合，作业计划的控制按编制人数和计划出工率来控制总工日，加强了定额管理和指令性作业项目，能按技术标准进行作业，克服以往的考核单以好路率为主，不考虑人的因素，避免了投入劳动量差别过大和劳动报酬分配上的不均现象。     

面向对象收费系统的数据安全与解决方案

一种利用计算机仿真技术整合多种库类型格式的创新方案,采用虚拟磁带库保护数据安全,保证了面向对象系统的数据存储更高性能与智能化,并已在面向对象技术的不停车收费系统中得到了成功应用。     

面向对象的虚拟FMS建模及加工仿真

为解决柔性制造系统中资源重组引起的布局问题,采用面向对象的建模方法建立了柔性制造系统的虚拟仿真系统.该虚拟仿真系统通过对制造系统中各设备进行几何和行为建模,建立虚拟设备模型;采用生产计划流建立车间布局方案和调度模型.通过仿真,不仅能验证加工代码的正确性,还能根据加工工艺仿真结果分析布局的合理性和可行性,并对布局进行优化.最后,对2种布局进行了仿真,结果表明所建立的仿真系统是可行和有效的.     

面向对象收费系统的数据安全与解决方案

一种利用计算机仿真技术整合多种库类型格式的创新方案,采用虚拟磁带库保护数据安全,保证了面向对象系统的数据存储更高性能与智能化,并已在面向对象技术的不停车收费系统中得到了成功应用.     

面向对象类测试方法研究

面向对象的软件开发给测试带来了新的挑战。类级测试是面向对象测试过程中的一个重要阶段。本文研究了基于代数规格说明的面向对象类测试方法,构造了一个半自动化的测试框架。公理系统是代数规格说明中的最重要部分,该框架主要基于CLA算法来完成代数规格说明中公理系统的设计和实现,采用GNF方案实现面向对象类级测试中范式半自动化辅助生成工具的设计和实现,最后在此基础上,将GFT算法实现为半自动化辅助工具。     

生产系统计算机模拟与优化分析

随着市场竞争日趋激烈，企业对投资巨大的生产系统生产的产品的质量、成本和时间提出了更高的要求。为降低企业决策风险，要求对生产系统的结构作出预期规划，应用计算机模拟技术则是解决这一问题的有效途径。文中以新一代多功能计算机模拟分析语言ＳＩＭＡＮ为模拟软件支撑环境，研究非流水、多工序、多设备组生产系统的设备利用优化问题。     

单件生产方式下汽车覆盖件模具CAPP系统的开发研究

汽车覆盖件模具CAPP系统是单件生产方式下的一种无编码的“广义CAPP”系统,已被用于微型轿车和轻型车的模具工艺设计,并实现了工艺设计工作全盘计算机作业化。系统对重要零件的工艺设计,具有不同的工艺方案可供选择。在系统内设有专门对外数据服务模块,可向成本核算、网络计划、材料定额等相关管理系统分别提供综合性数据服务,以实现系统间的信息集成。该系统已通过国家863/CIMS专家组的测试、验收和鉴定。     

Development of a theory of constraints based scheduling system for ship piping production

Manufacturing of ship piping system is one of the major production activities in shipbuilding. The schedule of pipe production has an important impact on master schedule of shipbuilding. In this research, the theory of constraints (TOC) concept is introduced to solve the scheduling problems of piping factory, and an intelligent scheduling system is developed. The system integrates a product model, an operation model, a factory model and a knowledge database of piping production and can make the process planning and production scheduling automatically. In the paper, details of above points are discussed. Moreover, an application of the system in a piping factory, which achieves a higher level of performance as measured by tardiness, lead time and inventory, is demonstrated at the end of the paper.     

多工序成组生产系统生产量和生产顺序综合优化的研究

本文借助分枝定界原理对包含生产准备时间的多工序成组生产进行了生产量和生产顺序综合优化的研究,建立了数学模型。对算法的加速,时间约束式的比较等进行了多方面的分析研究,最后提出了一个能得到精确解的有效算法。     

OPTIMIZATION OF INJECTION MOLDING PROCESS BASED ON NUMERICAL SIMULATION AND BP NEURAL NETWORKS

IntroductionPlastic injection molding is a very complexprocess and its process planning has a direct influ-ence on product quality and production efficiency.In real industry practice,the determination of in-jection molding process is usually made by makingmolding trial runs repeatedly by process planner,and the time needed and to whatdegree the param-eters were optimized are largely dependent on theexperience of process planner[1] .With marketcom-petition intensified,time and quality have beco…     

Grafting watermelon seedling production management system based on process control strategy

Greenhouse environmental management, seedling bed scheduling, and fertilizer and water management are the core technologies of seedling nursery. Precision management and control of the whole production process guarantees high grated seedling quality. In order to improve management efficiency of grafted watermelon seedling production and seedling quality, this paper designs and develops a grafted watermelon seedling production management system based on process control methods by process control strategy, seedling bed planning design, and handheld device technology.     

Proactive Approach for Production and Condition-Based Maintenance Integration Problem in a Deteriorating System

A proactive approach is constructed to cope with the integrated problem of batch production and maintenance in a deteriorating system. The condition of the system is modeled by a proportional hazards model(PHM) which considers both system deterioration state and usage. The deterioration state of system is uncertain and is only observed between batches. An integration model for optimizing production plan and conditionbased maintenance(CBM) policy is proposed, in which the maintenance threshold and production quantity are proactively decided simultaneously. To obtain a robust solution with minimal cost over the planning horizon, a simulation-based iterative algorithm is developed to solve the complicated non-linear model. Numerical results show that the performance of the developed approach is satisfactory under uncertainty.     

基于eM-Plant的集装箱码头交通仿真

用eM-Plant开发了一个面向对象的仿真模型,详细介绍了仿真模型中各模块的作用,模型中对象的划分方法、控制方法以及模型仿真参数的设置,并利用该模型模拟了某新建集装箱码头的生产过程,分析了其年吞吐量、岸桥利用率、交通流量等仿真数据,验证了其交通规划的合理性,用实例证明了使用eM-Plant分析、评价港口物流系统的可行性.     

Production balance of ship erection

A network plan model of ship erection was established based on the network planning technologyand the work-package breakdown system. The load-oriented production control method was introduced to buildup a throughput diagram model thus it is possible to describe the ship erection process numerically. Based onthe digitaiized models some cases of production balance of ship erection were studied and three balance indexeswere put forward, they are the load balance rate, the input manpower balance rate and the maximum gantrycrane operating times. Such an analytic method based on the balance evaluation is the important foundationfor digitization and intelligentization of shipyard production management.