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20钢水平连铸圆管坯轧制的钢管内部发纹研究 被引量:4
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作者 周勇 《轧钢》 2002年第1期25-27,共3页
介绍了用水平连铸圆管坯轧制钢管的内部发纹及显微组织情况 ,得出内部发纹是一种由 (Mn、Fe)S和疏松点、α -Fe构成的偏析带 ,是由管坯带来的 ;轻微内部发纹的存在对钢管的使用性能不会造成较大影响。
关键词 水平连铸 管坯 发纹 疏松点 20钢 管材轧制 无缝钢管
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SENILE OSTEOPOROSIS AND HIP FRACTURE
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作者 戴力扬 《Chinese Medical Sciences Journal》 CAS CSCD 1995年第1期42-44,共3页
A randomized block design was used to compare the Singh index, the cortical index of the femoral neck and the lateral cortical width of the femur of a group of patients with femoral neck fracture, a group with intertr... A randomized block design was used to compare the Singh index, the cortical index of the femoral neck and the lateral cortical width of the femur of a group of patients with femoral neck fracture, a group with intertrochanteric fracture, and a normal control group among a total of 102 postmenopausal women.The three indices in fracture group were very significantly (P<0.01) or significantly (P<0.05) different from those in the normal control subjects. The importance of osteoporosis in hip fracture of the aged is con firmed. Radiographic measurement of bone mass was found to have some predictive value for the risk of hip fracture. 展开更多
关键词 OSTEOPOROSIS hip fractures
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