股骨头缺血性坏死(osteonecrosis of the femoralhead,ONFH)在临床很常见,目前治疗方法很多,治疗目的是改善股骨头的血液循环,阻止骨质继续坏死,促进骨再生,恢复股骨头的解剖和组织结构,防止关节软骨退行性变[1]。介入治疗是创伤小、恢...股骨头缺血性坏死(osteonecrosis of the femoralhead,ONFH)在临床很常见,目前治疗方法很多,治疗目的是改善股骨头的血液循环,阻止骨质继续坏死,促进骨再生,恢复股骨头的解剖和组织结构,防止关节软骨退行性变[1]。介入治疗是创伤小、恢复快的一种治疗方法。展开更多
The mapping relationships among the motion coordinate errors along nine single coordinate lines,the straightness error and 21 other initial error items,and the mapping relationships among the tool geometric errors rel...The mapping relationships among the motion coordinate errors along nine single coordinate lines,the straightness error and 21 other initial error items,and the mapping relationships among the tool geometric errors related to work-piece space and initial error items are researched using laser interferometer for a three-axis machining center.Then,a nine-line measurement method and a volumetric error compensation method are put forward. Moreover,the rapid identification of initial error items and compensation of volumetric error are realized.展开更多
文摘The mapping relationships among the motion coordinate errors along nine single coordinate lines,the straightness error and 21 other initial error items,and the mapping relationships among the tool geometric errors related to work-piece space and initial error items are researched using laser interferometer for a three-axis machining center.Then,a nine-line measurement method and a volumetric error compensation method are put forward. Moreover,the rapid identification of initial error items and compensation of volumetric error are realized.