氧化铝基陶瓷型芯溶失性的研究进展

介绍了涡轮空心叶片用铝基陶瓷型芯的应用背景,探讨了铝基陶瓷型芯强化及溶失性能的重要意义。阐述了造型材料、成孔剂、脱芯方法对氧化铝基陶瓷型芯溶失性能增强的研究现状,并展望了铝基陶瓷型芯未来发展面临的挑战。     

变压器铁心精确压紧工艺

对变压器的铁心绑扎受力情况进行了分析,并提出了一套精确计算及控制铁心压紧力的工艺方法。     

铁心窗口内外的绕组漏磁场仿真研究

以一台型号为ODFPS-250000/500电力变压器为例,应用有限元分析软件对铁心窗口内外的绕组漏磁场进行了计算与分析,得到了绕组辐向磁密和轴向磁密的分布规律。     

基于开源软件的IMS通信网络的设计与实现

随着IP多媒体子系统技术的应用和发展,如何有效建立IMS通信网络环境是进行IMS网络架构与功能研究的前提与重点,为此,针对目前IMS小规模网络构建的需求,研究提出了一种基于开源软件的IMS通信网络构建方案,以解决标准IMS网络构建成本高、难度大等问题。此方案基于Open IMS Core开源项目,从虚拟机构建、通信协议配置以及通信业务配置等多方面阐述了网络构建的初步设想,为IMS相关的科学研究提供了新的学习、试验以及测试平台。     

关于“智慧城市”规划与建设核心因素的思考

建设智慧城市已被许多城市视为城市发展新动力,智慧城市的规划与建设问题的研究具有十分重要的意义.通过阐述智慧城市产生的原因和动力、智慧城市建设的本质和发展趋势,分析世界范围智慧城市的关键点及上海智慧城市建设的着力点,提出智慧城市规划与建设的工作指导原则.     

Market strategies and core capabilities in the building industry

The objective of this study is to show that the core competence approach has validity when applied to construction. The focus is on the analysis of the fit between market strategies of firms in the building industry and their core capabilities. Certain strategies require specific core capabilities and key external and internal conditions supporting these capabilities. The resource-based approach focuses on the conditions in a firm, the internal capabilities, and supports a core capability that is demanded. The network literature will be related to external conditions that support a core capability of a firm active in a certain market. In a multiple case study, firms are analysed that are involved in different stages of the building process. The case studies demonstrate firms with consistent patterns of market strategies, core capabilities, and supporting internal and external conditions. The specific core capability of the firm under investigation determines the types of external and internal conditions that are critical.     

回弹法检测高强混凝土强度实践浅析

回弹法检测高强混凝土强度宜优先采用高强回弹法,必要时可采用钻芯法进行修正。本文介绍了回弹法检测高强混凝土强度在建筑工程质量检测实践中的运用。     

基于培养核心能力的企业多元化发展战略

企业战略管理的最高层次是培养企业的核心能力。在从事多元化战略时,企业应该实施在核心专长与核心产业支撑下的有限相关多元化战略,制定正确的企业发展战略,确定自己的主营业务,在培养和保持自己的核心能力的前提下,进行多元化扩张。     

有色金属矿山企业在原料供应链中的定位与对策研究

本文通过对原料供应链的构成、矿山企业本身的特点以及矿山企业对供应链的影响力的深入分析，剖析了矿山企业培植利润增长点的环节和空间。认为矿山企业必须采取在自然资源的勘探、内部业务流程优化管理以及扩展供应链等环节上加大投入，培养自己作为供应链上中心企业的能力，增强企业的竞争力。     

Ultrasound assisted in situ emulsion polymerization for polymer nanocomposite: A review

This review covers an ultrasound assisted synthesis of polymer nanocomposites using in situ emulsion polymerization. First of all, surface modification of core nanoparticles with a coupling agent and surfactant has been employed for the synthesis of core–shell polymer nanocomposites. In addition to application of ultrasound for the synthesis of core–shell polymer nanocomposites, due to its influential efficiency, sonochemistry has been extensively used not only as an aid of dispersion for inorganic nanoparticles and organo-clay, but also acts as an initiator to enhance polymerization rate for synthesis of polymer nanocomposites. In situ emulsion polymerization of hydrophobic monomers, such as methyl methacrylate, butyl acrylate, aniline, vinyl monomers and styrene, using surfactant and water soluble initiator were carried out for a synthesis of core–shell polymer nanocomposite. This technique assists in preparation of stable and finely dispersed polymer nanocomposite with the loading of inorganic particles up to 5 wt.%. Recent developments in the preparation of core–shell polymer nanocomposites using an ultrasound assisted method with their physical characteristics such as morphology, thermal, and rheological properties and their potential engineering applications have been discussed in this review.