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三隧道Femoral-Intrafix固定双束重建对前交叉韧带损伤患者膝关节稳定性及功能的影响 被引量:1
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作者 冯志伟 刘殿奎 +2 位作者 常德勇 梁振星 杨辉 《中国医药导报》 CAS 2023年第21期88-91,共4页
目的探讨三隧道Femoral-Intrafix固定双束重建对前交叉韧带损伤患者膝关节稳定性及功能的影响。方法选取华北医疗健康集团峰峰总医院2019年11月至2020年11月收治的54例膝关节前交叉韧带损伤患者,采用随机抽签法将其分为观察组和对照组,... 目的探讨三隧道Femoral-Intrafix固定双束重建对前交叉韧带损伤患者膝关节稳定性及功能的影响。方法选取华北医疗健康集团峰峰总医院2019年11月至2020年11月收治的54例膝关节前交叉韧带损伤患者,采用随机抽签法将其分为观察组和对照组,各27例。对照组采用单隧道单束重建术,观察组采用三隧道Femoral-Intrafix固定双束重建,两组术后均随访24个月。比较两组手术及术后情况,比较两组术前及术后24个月的关节功能、膝关节稳定性差异,记录两组术后并发症发生情况。结果观察组住院、负重、下床活动时间均短于对照组(P<0.05)。术后24个月,两组国际膝关节评分委员会评分、Lysholm评分高于术前,且观察组高于对照组(P<0.05)。术后24个月,两组前抽屉试验、Lachman试验阳性率低于术前,且观察组轴移试验阳性率低于本组术前和对照组(P<0.05);对照组轴移试验阳性率与本组术前比较,差异无统计学意义(P>0.05)。两组并发症总发生率比较,差异无统计学意义(P>0.05)。结论三隧道Femoral-Intrafix固定双束重建能够更好地恢复患者膝关节功能和旋转稳定性,值得临床推广。 展开更多
关键词 单隧道单束重建 三隧道Femoral-Intrafix固定双束重建 膝关节 前交叉韧带损伤
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Scattering of SH waves by a scalene triangular hill 被引量:5
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作者 Lin Shuzhi Qiu Faqiang liu diankui 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2010年第1期23-38,共16页
The influence of local landforms on ground motion is an important problem. The antiplane response of a scalene triangular hill to incident SH waves is studied in this paper by using a complex function, moving coordina... The influence of local landforms on ground motion is an important problem. The antiplane response of a scalene triangular hill to incident SH waves is studied in this paper by using a complex function, moving coordinates and auxiliary functions. First, the model is divided into two domains: a scalene triangular hill with a semi-circular bottom; and a half space with a semi-circular canyon. Wave functions that satisfy the zero-stress condition at the triangular wedges and at the horizontal surface are constructed in both domains. Then, considering the displacement continuity and stress equilibrium, algebraic equations are established. Finally, numerical examples are provided to illustrate the influence of the geometry of the hill and the characteristics of the incident waves on the ground motions. 展开更多
关键词 scattering of SH-wave scalene triangular hill moving coordinates complex function ground motion
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STRESS CONCENTRATIONS IN CYLINDRICAL SHELLS WITH LARGE OPENINGS 被引量:3
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作者 liu diankui Song Tianshu, Harbin Engineering University, Harbin 150001, China 《Acta Mechanica Solida Sinica》 SCIE EI 1997年第3期220-234,共15页
Based on Donnell's shallow shell equation, a new method is given in this paper to analyze theoretical solutions of stress concentrations about cylindrical shells with large openings. With the method of complex var... Based on Donnell's shallow shell equation, a new method is given in this paper to analyze theoretical solutions of stress concentrations about cylindrical shells with large openings. With the method of complex variable function, a series' of conformal mapping functions are obtained from different cutouts' boundary curves in the developed plane of a cylindrical shell to the unit circle. And, the general expressions for the equations of a cylindrical shell, including the solutions of stress concentrations meeting the boundary conditions of the large openings' edges, are given in the mapping plane. Furthermore, by applying the orthogonal function expansion technique, the problem can be summarized into the solution of infinite algebraic equation series. Finally, numerical results are obtained for stress concentration factors at the cutout's edge with various opening's ratios and different loading conditions. This new method, at the same time, gives a possibility to the research of cylindrical shells with large non-circular openings or with nozzles. 展开更多
关键词 cylindrical shell with large opening theoretical solution for single circular cutout conformal mapping and complex variable method
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