Micro fluid behaviors in micro injection molding process were studied with theoretic analysis, experimental test and software simulation, which contribute greatly to micro injection mold design and processes optimizing in theoretical and practice meaning. 作者采用理论分析、软件仿真和实验测试相结合的方法研究了微注射成型过程的喷泉及收缩流动,对微注射成型模具设计和成型工艺优化具有重要的理论和实践意义。
However, due to the small-size and fragile cutter, the major problems that hinder the development of micro milling are unpredictable tool life and premature tool failure in micro milling process. 但是,由于微铣刀直径小、强度低,刀具过早失效和寿命的不可预知已经成为阻碍微铣削发展的一个很大障碍。
Micro discharge energy and micro discharge gap cause the un-stable discharge state during micro-EDM process, which leads to the low machining efficiency and high electrode wear ratio. Such shortcomings restrict the application of micro-EDM in micro machining fields. 但微细电火花加工过程也存在因放电能量及放电间隙微小而导致的放电状态不稳定、加工效率低、电极损耗大的缺点,严重制约着该技术在微细加工领域的广泛应用。
Micro assembly technology is used for producing 3D micro structures, solving the problem of process compatibility, and distributed manufacture. 微器件装配技术是获得三维微细结构、解决工艺兼容性问题和组件级分工合作问题的有效手段。
Then where do the characteristics of micro blogging culture to present? What are the problems for micro blogging in the process of spreading? What is the tendency of micro blogging will evolve? All these questions are worth of further researching. 那么,微博客文化的后现代性表现在哪里?目前中国的微博客文化传播存在哪些问题?未来的发展趋势是怎样?这些问题都是值得深入探究的。