Al-Ti-B合金昌粒细化剂及细化机理的发展与现状

晶粒细化是提高材料强度和塑性,改善铸件质量的重要途径之一,其成功的关键在于形成高效、稳定、价廉的细化剂产品。在介绍Al-Ti-B合金晶粒细化剂的应用现状及生产方法的基础上,分析了晶粒细化剂的细化机理,明确了目前尚存在的问题,指出了今后的发展方向。     

铋基中间合金显微组织研究

介绍了Ｂｉ－Ｍｎ（及Ｂｉ－Ｍｎ－Ｆｅ）系和Ｂｉ－Ｎｉ（Ｂｉ－Ｎｉ－Ｆｅ）系高熔点铋中间合金的相及显微组织特征,以进一步建立含铋相的性质、数量与合金熔点间的定量关系。本文为Ｂｉ－Ｍｎ系、Ｂｉ－Ｎｉ系中间合金成份的优化提供了依据。     

主从结构的双时态数据模型的设计应用

针对医院信息管理系统（ HIS）中的时态信息处理需求,提出了一种具有主从结构的双时态数据模型,进一步,对该模型的时态实体完整性、时态参照完整性以及用户定义的时态完整性进行了分析和设计。实际应用表明,新模型不仅具有良好的数据完整性约束机制,而且还易于实现时态数据的分段储存。     

苏州“城中村”基础设施现状与对策

"城中村"问题是制约我国城市化进程的一大难题。目前,针对"城中村"问题的研究多数集中在宏观层面。从苏州"城中村"存在的几个主要问题入手,采取实地查看、调查问卷等方式,重点分析了"城中村"基础设施现存问题,并给出合理化建议,为今后解决"城中村"问题提供借鉴。     

Dilatometric study of anisotropic sintering of alumina/zirconia laminates with controlled fracture behaviour

Al₂O₃ and ZrO₂ monoliths as well as layered Al₂O₃/ZrO₂ composites with a varying layer thickness ratio were prepared by electrophoretic deposition. The sintering shrinkage of these materials in the transversal (perpendicular to the layers, i.e. in the direction of deposition) as well as in the longitudinal (parallel with layers interfaces) direction were monitored using high-temperature dilatometry. The sintering of layered composites exhibited anisotropic behaviour. The detailed study revealed that sintering shrinkage in the longitudinal direction was governed by alumina (material with a higher sintering temperature), whilst in the transversal direction it was accelerated by the directional sintering of zirconia layers. For interpretation of such anisotropic sintering kinetics, the Master Shrinkage Curve model was developed and applied. Crack propagation through laminates with a different alumina/zirconia thickness ratio was described with the help of scanning electron microscopy and confocal laser microscopy.     

A supply chain disruption recovery strategy considering product change under COVID-19

A recent global outbreak of Corona Virus Disease 2019 (COVID-19) has led to massive supply chain disruption, resulting in difficulties for manufacturers on recovering their supply chains in a short term. This paper presents a supply chain disruption recovery strategy with the motivation of changing the original product type to cope with that. In order to maximize the total profit from product changes, a mixed integer linear programming (MILP) model is developed with combining emergency procurement on the supply side and product changes by the manufacturer as well as backorder price compensation on the demand side. The model uses a heuristic algorithm based on ILOG CPLEX toolbox. Experimental results show that the proposed disruption recovery strategy can effectively reduce the profit loss of manufacturer due to late delivery and order cancellation. It is observed that the impact of supply chain disruptions is reduced. The proposed model can offer a potentially useful tool to help the manufacturers decide on the optimal recovery strategy whenever the supply chain system experiences a sudden massive disruption.     

石油企业加强库存控制的策略

库存管理是企业管理的重要组成部分。加强库存管理已成为企业转变经营方式、提高经营业绩的重要内容。为了更好地解决石油企业当前由于库存管理的观念相对落后、石油企业物资供应模式流转环节过多、部门之间缺乏必要交流、缺乏物资储备定额研究等问题,石油企业必须进一步加强石油企业库存控制,努力降低物流总成本,提高经营业绩、提高客户服务水平,制订石油企业库存控制策略,加强物质储备定额研究,实施全面库存管理,加大积压物资处理力度、努力降低当前库存,强化库存考核,强化物资计划管理,积极开展VMI（供应商管理库存）。     

“卓越工程师教育培养计划”背景下工程专业文化精神渗透的研究

先界定了在工程教育中进行专业文化精神渗透的概念内涵,分析了国内外相关研究现状,从而探讨了在“卓越工程师教育培养计划”背景下进行工程专业文化精神渗透具有：有效提升工程人才的培养质量、弥补工程院校特别是新建本科院校教育力量不足的作用。论述了可以从借助实践性教学、校园文化建设等方面来实施工程专业文化精神渗透。’     

Chinese University Development Project

This report is a historical document from 1985, with some footnotes highlighting the change towards the present. From a quite personal perspective, Computer Science education at the university level in the USA and West Germany are compared, endeavoring to take the best of both educational systems to derive recommendations for the emerging development in China.