In this approach , remaining operating time ( rot ) is divided into two types : one is relative rot , and the other is absolute rot . a new dispatching rule , i . e . the maximum relative rot of part is priority , is presented . this scheduling algorithm is proven to be effective by examples and theory analysis 论文重点研究了在单件、小批量生产方式下,基于启发式的作业车间调度问题,提出了优先分配启发式算法的一种新的优先分配规则,即相对剩余加工时间最大的概念,并从理论分析和软件实现两个方面验证了该算法的有效性。
Rapid prototyping technology changed the traditional pattern of product design , which could offer product sample for the designer , reduced design cycle and quicken the schedule of new product design , and it gave the decision - makers visual feeling . ; rp technology provided kinds of molds including resin - boncled mold laminate mold , investment mold and lost foam casting mold and so on for sand casting investment casting and cavityless casting , it could also use direct shell production casting to make pattern dies metal dies die - casting dies injection dies directly , and it could even produce casting products in small scales . the applications of fdm technology in plaster precision casting and the rapid casting technology based on sls technology were introduced , the organic combination between rapid prototyping tecnnology and foundry process , which initiated a new period of rapid manufacturing metal parts , by using advanced new technology alternated traditional foundry industry to make it looked brand - new , thus , the competition of foundry industry would be improved ; rapid prototyping technology offered a rapid economical feasible technical method , common processes of using rapid prototyping technology to produce dies were discussed , in the paper it explored that . the problem of combining rapid prototyping technology with electric arc metal - spraying technology to make metal dies and technics in dies manufacturing of combining rapid prototyping technology with precision casting , rapid tooling based on rapid prototyping , integrated advanced new technology and tradition technology of rapid prototyping manufacture , each superiority were exerted , rapid prototyping technology had been an efficiency measure to rapid update products and develop new product , and to middle - 快速成型技术改变了传统的产品开发模式，可以为设计者提供产品样件，缩短设计周期，加快新产品的开发进度，为决策者提供直观性；快速成型技术迅速提供砂型铸造、熔模铸造、实型铸造用的各种模样，包括树脂模、层压模、熔模和消失模等，还可采用直接制壳铸造法直接制造熔模铸造用的压型、金属型、压铸型、注塑模，甚至直接制造小批量铸件，介绍了熔积成型技术在石膏型精密铸造上的应用和基于选择性激光烧结技术的快速铸造技术，快速成型技术与铸造工艺的有机结合，开创了快速制造金属零件的新阶段，对用高新技术改造传统的铸造工业，使其面貌焕然一新，增强铸造行业的竞争能力；快速成型技术为母模的制造提供了一条快速、经济、可行的技术途径，讨论了利用快速成型技术制造模具的一般工艺方法，探讨了将快速成型技术与金属电弧喷镀技术结合起来快速制造金属模具问题，以及快速成型技术与精密铸造技术相结合的模具制造工艺，基于快速成型制造的快速模具技术，集成了快速成型制造高新技术和传统技术，发挥各自优势，已成为产品快速更新换代和新产品开发及中、小批量生产的有效手段之一。
In order to realize the efficiency of the im , the writer has put forward the two seeking views : the management system integrating supplying and sale and inventory based on the work f i ow and im mode based on agent , which orient to the producing enterprise of singleness and small batch type , referring to many theories about the [ m and advanced it , after the serious - minded and practicing investigation . and according as the relative software theories and developing technologies , the writer has programmed the im software module based on the two c / s structure 为了实现有效的库存管理，作者在对现有系统认真详尽的实际调查基础上，结合库存管理的相关理论和先进的信息化技术提出了面向中小型单件小批量生产企业的基于工作流供销存一体化管理系统和基于agent的库存管理模式两个探索性的观点，并利用相关软件理论和开发方法，采用vc + +计算机语言开发了基于c s两层结构的库存管理模块。
The input and output pressure of the controller were tested statically and dynamically under high , mid and low u conditions and real road conditions in computer routing , the controller satisfied two goals : delay and reduce the peak of braking pressure and produce s uperior braking distance 模拟各种路面条件，使用cras软件测试防抱死控制器的动、静态输入输出压力，并进行控制器装车道路试验，实验均取得了预期效果。课题的研究成果已取得国家专利，目前已作为产品投入小批量生产。
In this paper , the state of research of the statistical process control based on small batch production is summarized . the application and its problems about statistical process control in contemporary manufacturing mode are analyzed . based on the analysis on the characteristics of small batch production , it is concluded that the traditional shewhart control chart is not suitable for quality control of small batch production 本文简述了小批量统计过程控制的研究现状,对当前制造模式下多品种小批量生产的质量控制应用情况和存在的主要问题进行了研究;通过分析小批量生产的特点,得出了传统的休哈特控制图难以应用在小批量生产条件下进行质量控制的结论。
By these new control charts , the steady control limits are able to build when the production begins , the problem is solved that the appropriate control limits are hard to be built by using the traditional shewhart control chart in small batch production environment because enough data can not be acquired 这种控制图可以在生产过程一开始就根据给定的条件建立起稳定的控制界限,从而解决了传统的休哈特控制图应用在小批量生产条件下数据量不足,无法建立起合适控制界限的问题。
