It is said that the key point of reducing the human capital loss in western China is to upraise the level of the three variables . This is the only way we must pass to achieve concentration of human capital even the sustainable development of economy . 6 .

指出西部地区减少人力资本流失的关键是要在 专业 化人力资本、 产业 集聚 和 城市 化这三个方面上提高水平，这才是西部地区实现人力资本集聚，进而促进经济可持续发展的必由之路。

And then reduced model is founded warping deformation of variant bracing diaphragms and sheet metals at optima laying angle are surveyed finally the process to upraise the rapid prototyping precision of the thin shell parts is set up .

建立简化模型，在最优摆放角度条件下，研究了不同支撑的薄片和薄板的翘曲变形，提出了 提高 薄壳零件快速成型精度的工艺。