期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
贵州省民族地区“三变”改革现状及对策思考
1
作者 胡昕 《南方农业》 2020年第20期98-99,共2页
"三变"改革是指资源变资产、资金变股金、农民变股民,其目的在于促进农业生产增效、农民生活增收、农村生态增值。少数民族聚居地大多处于边远地区,较为贫穷落后,如何利用"三变"改革帮助其发展民族经济是急需解决... "三变"改革是指资源变资产、资金变股金、农民变股民,其目的在于促进农业生产增效、农民生活增收、农村生态增值。少数民族聚居地大多处于边远地区,较为贫穷落后,如何利用"三变"改革帮助其发展民族经济是急需解决的问题。基于此,分析贵州省民族地区"三变"改革的实施现状、存在的问题及原因,提出相应的改革建议。 展开更多
关键词 民族地区 “三变”改革 经济发展
下载PDF
ANALYSIS AND RESEARCH OF COMPUTER-AIDED MODEL OF HIP JOINT BASED ON REVERSE ENGINEERING
2
作者 huxin XiJuntong +2 位作者 JinYe GuDongyun DaiKerong 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2003年第3期309-312,共4页
Former research work about the modeling of hip joint focus on the uppersegment of femoral, and assumes the acetabulum cup is sphere concave, and the acetabulum prosthesesis semisphere. A method of acquiring the point ... Former research work about the modeling of hip joint focus on the uppersegment of femoral, and assumes the acetabulum cup is sphere concave, and the acetabulum prosthesesis semisphere. A method of acquiring the point data on the surface of the hipbone using the reverseengineering technology is presented. After analyzing the acetabulum surface fitting error, arotation ellipsoid CAD model is applied to fit the acetabulum surface, and then optimizationtechnique is used to find the geometric parameters of the model. The fitting error between thesphere and rotation ellipsoid is compared and gets the result that the fitting error of rotationellipsoid is smaller than sphere, and the rotation ellipsoid can describe the shape of theacetabulum better. 展开更多
关键词 Total hip joint replacement Reverse engineering Optimization method
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部