基于快速成型及逆向工程技术的脸部假体实验研究

针对脸部假体修复中存在的不足,提出基于快速成型及逆向工程技术的脸部假体工艺方案.该方案通过ATOS便携式三维扫描仪获取患者脸部数据,应用FreeForm软件修复及个性化设计患者的脸部模型,并通过快速成型设备制作出脸部假体样件,最后通过CAV软件进行精度分析.实验结果表明:所提出的方案能够经济快捷地制作出精度可靠的个性化脸部假体.     

A Model Fitting Approach to Depict the Global Textile Trade

Since the mercantilism era, economists have built up trade theories to explain the rationale and patterns of world trade.In this paper, the explanatory power of the international product life cycle (IPLC) theory for describing the trends and patterns of the global textile trade, one of the most geographically dispersed export items in both developed and developing countries/regions, is discussed. Data at SITC two-digit level (SITC 65) were collected and time series regressions were performed to analyze the value trends and world shares of textile exports from 1990 to 2000 for selected developed economies. It was found that some developed economies have increased their world shares in textile exports, which indicated that global trade shift in the textile industry may not follow what the IPLC has suggested.