Memminger-IRO:最新纬编机配件

纬编织物最常见的痴点是布面外观不均匀、纵向条纹疵点、横档、织针以及弹力垫纱疵点等,为避免此类疵点的产生,提高产品质量,同时提高生产效率,介绍了几种通过新开发的纬编机配件进行的技术改造。     

Regional and Global Technological Knowledge Search Strategies and the Innovative Performance of Large Multinational Corporations

This study focuses on the innovative performance implications of large MNCs' regional and global technological knowledge search strategies. In networked MNCs, the parent can still offer valuable knowledge to subsidiaries. The parent's and a subsidiary's knowledge becomes complementary if an MNC appropriately adopts a global strategy at the parent level and a regional strategy at the subsidiary level. An analysis of the world's largest firms in the Electrical Equipment industry shows that, in general, a global strategy improves the innovative performance of the MNC. Meanwhile, only the combination of a global strategy at the parent level and a regional strategy at the subsidiary level is positively associated with the innovative performance of the MNC. This study contributes to the literature on networked MNCs and the debate of globalization and regionalization. Managerial implications are discussed as well.     

从无形资产受益角度透视跨国公司与东道国共赢之道

在全球化浪潮下,跨国公司不能再以殖民者的姿态为自身谋利;而东道国也不能狭隘地以保护民族产业、维护国家经济安全为由抵制跨国公司的进入。跨国公司与东道国的竞合关系,在无形资产收益上表现得愈益突出。无形资产使东道国和跨国公司双赢,持久得益。     

Roles of subsidiary managers in multinational corporations: The effect of dual organizational identification

Abstract and Key Results

基于Myrinet/GM的多通道通信

通信子系统对并行系统的计算效率有重要影响,大规模应用对并行平台的通信性能和可用性提出了挑战性的要求.多通道通信技术通过并行采用多路网络链路互连来提高并行系统通信性能和可用性.首先分析了多进程复用网络对通信性能的影响,然后以Myrinet/GM网络平台为基础,提出了基于网络接口层的通信链路动态选择与分配策略,设计和实现了支持多路Myrinet网络并行通信的协议层MNC.MNC支持通信进程平等,充分地利用多路Myrinet网络链路资源.在使用2路Myrinet互连的PC机群平台上,MNC进程间通信带宽相对于单链路提高了约34%,有效地提高了应用层通信性能.     

Construction of functional aliphatic polycarbonates for biomedical applications

Aliphatic polycarbonates are one important kind of biodegradable polymers and have been commonly used as integral components of engineered tissues, medical devices and drug delivery systems. As far as the biomedical application is concerned, traditional aliphatic polycarbonates usually suffer from the strong hydrophobicity, deficient functionality, and insufficient compatibility with cell/organs. Consequently, the application is quite limited in scope. Due to the imparted appealing properties, aliphatic polycarbonates bearing specifically designed functional/reactive groups attract great interest from researchers in the recent years. The present review outlines the development up to date concerning the design and biomedical application of functional aliphatic polycarbonates, with an emphasis on their ring-opening (co)polymerization preparation.     

用于T716A立式镗床数控化改造的四坐标闭环系统

针对T716A立式金刚镗床的数控化改造，设计了一种双CPU结构的四坐标控制系统，该系统完成三个坐标的闭环控制和一个坐标的开环控制，可以实现任意两坐标的联动。选用DS80C320单片机作为CPU，采用直线光栅检测线位移、圆光栅检测角位移，闭环的控制采用一种特殊形式的PID数字调节器。分析了系统的硬件结构，给出了闭环控制的软件流程。提出了电接触法和光栅零位法两种对刀方式。借助于这种系统，T716A拓宽了加工范围，实现了精确的位置控制与轨迹控制，工效明显提高。     

一种融PLC与MNC为一体的新型数控系统

基于LG97L52单片机设计丁一种双CPU结构的新型数控系统，该系统将PLC的功能与MNC的功能融为一体。分析了系统的硬件结构，介绍了系统的工作原理，给出了软件设计的流程。系统既可以完成逻辑控制与定时／计数控制，又可以实现精确的位置控制与轨迹控制。批量使用结果表明，该系统功能实用、价格低廉、可靠性高，具有一定的推广使用价值。     

复杂摆线基于时间分割的插补原理研究

利用虚拟圆弧插补和Ｔａｙｌｏｒ 级数展开,阐述了基于时间分割的内、外复杂摆线二阶近似扩展数字积分插补算法。同时给出插补算法计算流程图     

一种融PLC与MNC为一体的新型数控系统

基于LG97L52单片机设计了一种双CPU结构的新型数控系统,该系统将PLC的功能与MNC的功能融为一体。分析了系统的硬件结构,介绍了系统的工作原理,给出了软件设计的流程。系统既可以完成逻辑控制与定时/计数控制,又可以实现精确的位置控制与轨迹控制。批量使用结果表明,该系统功能实用、价格低廉、可靠性高,具有一定的推广使用价值。