Card-based delivery date promising in pure flow shops with order release control

Card-based systems are simple, effective means of controlling production. Yet most systems concentrate on controlling the shop floor. They neglect other planning tasks, like estimating short, feasible due dates during customer enquiry management. A card-based version of the workload control concept for job shops – COBACABANA (COntrol of BAlance by CArd-BAsed Navigation) – was proposed in the literature to overcome this shortcoming. COBACABANA uses cards for due date setting and order release, making it a potentially important solution for small shops with limited resources. But many such firms operate as flow shops rather than job shops. Research demonstrated that COBACABANA’s release mechanism must be adapted if applied to a pure flow shop, but its approach to due date setting has not been evaluated in such an environment. We show COBACABANA has the potential to improve pure flow shop performance, but its due date setting procedure should be adapted compared to job shops. In a flow shop, due date estimation can also be further simplified by considering the load awaiting release to the first (gateway) station only while maintaining most performance benefits. The results are important for all card-based systems that aim to stabilise work-in-process, including kanban and ConWIP (Constant Work-in-Process).     

正确把握“三个环节” 做好经常性思想工作

“及时发现,确实弄清,正确解决”是做好经常性思想工作的３个基本环 节。“及时发现”是做好经常性思想工作的前提,要做到及时发现,一要把握规律,搞好 预测;二要留心观察,掌握细微;三是个别交谈,讲究艺术;四要摸底测试,搞好普查; 五是会议收集,全面分析。“确实弄清”是做好经常性思想工作的关键,一要搞好调查 研究,弄清思想问题的真正原因;二要进行科学分析,弄清思想问题的本质。“正确解 决”是做好经常性思想工作的目的,一要动之以情;二要晓之以理;三要喻之以义;四 要导之以行。     

构建投入机制 夯实工作基础全力实现云南水利跨越发展

为贯彻落实中央加快水利改革发展的决策部署,云南省委、省政府针对云南实际,出台了一系列含金量高、操作性强的相关政策.“兴水强滇”战略决定的出台实施,特别是“按土地出让收入的5％计提专项水利资金用于农田水利建设”等措施和做法,为建立水利投入稳定增长机制提供了政策保障.一年来,在水利投入不断加大的推动下,云南水利基础设施建设质量和速度显著提高,各项水利建设进展顺利.在此基础上,云南抢抓机遇,明确一条主线,抓住两个关键,实现三个突破,建成四大体系,强化五个支撑,朝着水利跨越发展的目标迈进.     

建设项目实施阶段工程造价控制的合同管理

文章从造价控制的角度分析论证了加强建设工程合同管理的重要性。提出了合同订立阶段对工程合同类型的选择，合同的工程造价支付管理、工程造价变更管理、工程造价风险管理的思路和方法，以工程合同的主动有效管理，达到控制工程造价、保证建设项目顺利实施的目的。     

深圳河湾污水系统研究

深圳河湾污水截排工程投资超过人民币5亿元。工程方案坚持以科学的发展观为指导，将节水与防污相结合，将发展循环经济作为方案研究的出发点与落脚点，对深圳河湾流域的污水处理尾水排海、污水资源化、水体生态修复等作出了长远规划。     

多媒体CAI课件制作分析

本根据当前多媒体课件制作和使用情况，对多媒体课件在制作中存在的问题及原因进行了剖析，重点提出多煤体课件制作的五个原则、教学性原则、控制性原则、简约性原则、科学性原则。同时，也分析了课件制作的方法和制作误区。     

油井管特殊扣产品拧接的自动判定法

在油井管特殊扣产品的加工过程中,拧接是一个重要工序,而拧接设备是否具有自动判定的功能,自动判定方法合适与否,都会对生产节奏和质量控制产生影响。本文介绍了一种自动判定的方法,通过对拐点的扭矩数值、圈数的判断,再加上一些防错手段,实现对特殊扣拧接曲线的自动判定。     

Inertization of Coal Ashes by the Vitrification Technique: A Mixture Design Approach

This article deals with the study of the vitrification mechanism as an inertization method for coal ashes contaminated with heavy metals. Ashes from coal (thermoelectric) and wastes from mining of fluorite and feldspar and from plating were used to compose vitreous systems using a mixture design. The chemical composition of the wastes was determined by XRF and the formulations were melted at 1450°C for 2 h using 10% (mass) of Na₂CO₃ (as a fluxing agent). The glasses were poured into a mold and annealed (600°C). The characteristic temperatures were determined by thermal analysis (DTA, air, 20°C/min) and the mechanical behavior by HV. As a result, the softening temperature is strongly dependent on silica content of each glass, and the fluorite residue, being composed mainly by silica, strongly affects on the glass transition (T_g) and softening (T_s) temperatures. The hardness by micro-indentation of all glasses is mainly affected by the plating (galvanic) residue due to the high iron and zinc content of this waste.     

中国传统民居再现

本文介绍了当今住宅的发展趋势,何谓传统民居,结合当代某些楼盘的开发去诠释传统住宅文化在当代建筑里的保存和利用,揭示了当代楼盘设计越来越向传统民居布局靠拢的特点。