肩关节置换术是治疗肩关节疾病最有效的方法之一。术后短期内人工肩关节存活率高,患者恢复效果好,但长期而言,人工肩关节磨损产生的无菌性松动会大大增加手术失败的机率。肩关节结构复杂、典型运动不明确,目前国际上仍未公布人工肩关节...肩关节置换术是治疗肩关节疾病最有效的方法之一。术后短期内人工肩关节存活率高,患者恢复效果好,但长期而言,人工肩关节磨损产生的无菌性松动会大大增加手术失败的机率。肩关节结构复杂、典型运动不明确,目前国际上仍未公布人工肩关节的磨损试验标准。因此,需要研究、分析总结出肩关节的生物力学环境并建立相应的运动曲线,为人工肩关节磨损试验方案及标准的制定提供依据。本文基于人体肩关节活动规律,采用日常活动(activities of daily living,ADL)量表将肩关节活动能力划分为基本或躯体日常生活活动能力(basic or physical activities of daily living,BADL or PADL)和工具性日常生活活动能力(instrumental activities of daily living,IADL),并对其中几种特定运动规律建立了肩关节运动曲线。本文研究结果为人工肩关节磨损试验方案及标准的制定奠定了基础。展开更多
In this paper, firstly, we get the Hojman exact invariants by Lie symmetry for an undisturbed generalized Raitzin equation of motion. Secondly, we study the perturbation to Lie symmetry of generalized Raitzin canonica...In this paper, firstly, we get the Hojman exact invariants by Lie symmetry for an undisturbed generalized Raitzin equation of motion. Secondly, we study the perturbation to Lie symmetry of generalized Raitzin canonical equation of motion and get Hojman adiabatic invariants. Lastly, an example is given to illustrate the application of the results.展开更多
文摘肩关节置换术是治疗肩关节疾病最有效的方法之一。术后短期内人工肩关节存活率高,患者恢复效果好,但长期而言,人工肩关节磨损产生的无菌性松动会大大增加手术失败的机率。肩关节结构复杂、典型运动不明确,目前国际上仍未公布人工肩关节的磨损试验标准。因此,需要研究、分析总结出肩关节的生物力学环境并建立相应的运动曲线,为人工肩关节磨损试验方案及标准的制定提供依据。本文基于人体肩关节活动规律,采用日常活动(activities of daily living,ADL)量表将肩关节活动能力划分为基本或躯体日常生活活动能力(basic or physical activities of daily living,BADL or PADL)和工具性日常生活活动能力(instrumental activities of daily living,IADL),并对其中几种特定运动规律建立了肩关节运动曲线。本文研究结果为人工肩关节磨损试验方案及标准的制定奠定了基础。
文摘In this paper, firstly, we get the Hojman exact invariants by Lie symmetry for an undisturbed generalized Raitzin equation of motion. Secondly, we study the perturbation to Lie symmetry of generalized Raitzin canonical equation of motion and get Hojman adiabatic invariants. Lastly, an example is given to illustrate the application of the results.