以AnyBody仿真骨骼肌多体逆向动力学三元素肌肉收缩力模型及有限元法构建八段锦动作的三维胫骨模型,全面、客观地计算不同动作最大肌力峰值时刻的积分肌电、力矩、肌肉收缩等生物力学特性.将10例健康青年八段锦志愿者的身高、体质量、...以AnyBody仿真骨骼肌多体逆向动力学三元素肌肉收缩力模型及有限元法构建八段锦动作的三维胫骨模型,全面、客观地计算不同动作最大肌力峰值时刻的积分肌电、力矩、肌肉收缩等生物力学特性.将10例健康青年八段锦志愿者的身高、体质量、髋宽、髋深、膝宽、踝宽等形态学数据作为约束条件,用AnyBody7.1.2软件导出八段锦8个动作下肢最大肌力指标,依据胫骨最大应力约束条件,用Minics 10.01、Geomagic studio 2013、ANSYS 19.2软件建构三维数据,添加AnyBody中的3个方向数据,分析并计算不同动作最大力的应力传导大小、分布规律.研究结果表明:八段锦是左右对称性运动,双侧同块肌肉积分肌电值、肌肉力值无显著性差异,有利于锻炼双下肢稳定性及协调性,运动中人体需要通过移动来保持平衡,膝关节在垂直轴方向力最大,伸展力矩值最大;做八段锦运动过程中,髋关节主导发力肌肉为臀中肌,膝关节主导发力肌肉为比目鱼肌、股外侧肌、腓肠肌,踝关节主导发力肌肉为拇长屈肌;表面肌电验证是评价人体肌肉激活程度的主要方式,八段锦运动中胫骨前肌、腓肠肌、股直肌、股二头肌的肌肉活性仿真结果与积分肌电值具有较高的一致性.以AnyBody软件分析下肢动作特征和有限元软件建构的胫骨模型,适用于八段锦动作的动态研究,可为计算八段锦运动时动力学变化提供新思路与实践价值参考.展开更多
Previous studies have postulated the contribution of present-day low-total organic carbon(TOC)marine carbonate source rocks to oil accumulations in the Tabei Uplift,Tarim Basin,China.However,not all present-day low-TO...Previous studies have postulated the contribution of present-day low-total organic carbon(TOC)marine carbonate source rocks to oil accumulations in the Tabei Uplift,Tarim Basin,China.However,not all present-day low-TOC carbonates have generated and expelled hydrocarbons;therefore,to distinguish the source rocks that have already expelled sufficient hydrocarbons from those not expelled hydrocarbons,is crucial in source rock evaluation and resource assessment in the Tabei Uplift.Mass balance can be used to identify modern low-TOC carbonates resulting from hydrocarbon expulsion.However,the process is quite complicated,requiring many parameters and coefficients and thus also a massive data source.In this paper,we provide a quick and cost effective method for identifying carbonate source rock with present-day low TOC,using widely available Rock-Eval data.First,we identify present-day low-TOC carbonate source rocks in typical wells according to the mass balance approach.Second,we build an optimal model to evaluate source rocks from the analysis of the rocks'characteristics and their influencing factors,reported as positive or negative values of a dimensionless index of Rock-Eval data(IR).Positive IR corresponds to those samples which have expelled hydrocarbons.The optimal model optimizes complicated calculations and simulation processes;thus it could be widely applicable and competitive in the evaluation of present-day low TOC carbonates.By applying the model to the Rock-Eval dataset of the Tabei Uplift,we identify present-day iow-TOC carbonate source rocks and primarily evaluate the contribution equivalent of 11.87×10^9 t oil.展开更多
The smart low-carbon development of modern cities has become one of the academic hotspots.However,the dynamics is rarely involved.Therefore,TOPSIS method was used to take a quantitative study on the dynamics of smart ...The smart low-carbon development of modern cities has become one of the academic hotspots.However,the dynamics is rarely involved.Therefore,TOPSIS method was used to take a quantitative study on the dynamics of smart low-carbon development for major Chinese cities.The results showed that:(1) 3 main dynamics of smart lowcarbon city development in China are institution and culture conditions,facility and function conditions and economy and industry conditions,but the overall utility is relatively low;(2) the level of dynamic operation mechanism of smart low-carbon development for major Chinese cities is distinct between regions,indicating a spatial law of diminishing from the east to the west and differing within regions;(3) the imbalance of comprehensive dynamic mechanism and operation state between major cities is prominent,showing an urban scale law of decreasing from big to small and differing within each scale and an administration hierarchy law of descending from high to low and differing within each class;(4) 7 basic development patterns can be obtained,and most of the cities take the external strong internal weak mode,which basically matches with its development realities.展开更多
目的 了解2023—2024年山东省猴痘病例流行病学特征,为猴痘疫情科学防控提供依据。方法 于中国疾病预防控制信息系统及中国疾病预防控制中心流行病学调查信息系统获取山东省猴痘病例信息及个案调查信息。采用描述性流行病学方法分析猴...目的 了解2023—2024年山东省猴痘病例流行病学特征,为猴痘疫情科学防控提供依据。方法 于中国疾病预防控制信息系统及中国疾病预防控制中心流行病学调查信息系统获取山东省猴痘病例信息及个案调查信息。采用描述性流行病学方法分析猴痘病例流行特征,采用SPSS 25.0统计软件进行统计分析。结果 2023年6月15日青岛市报告山东省首例猴痘确诊病例,截至2024年12月全省累计报告病例61例,无死亡病例。病例均为男性,中位年龄M(P_(25),P_(75))为33(29,38)岁。53例(86.9%)、23例(37.7%)、15例(24.6%)和35例(57.4%)分别自述为男男性行为者(men who have sex with men, MSM)、艾滋病病毒感染者、梅毒感染者和在发病前21 d有同性性接触史。2023年7月达到发病高峰,随后病例逐渐减少至每月3例以下。病例来源涉及山东省的11个地市,山东大学和青岛市共计报告34例(占55.7%),病例均为主动就诊发现,发病至就诊时间间隔M(P_(25),P_(75))为3(2,6)d,发病至诊断时间间隔M(P_(25),P_(75))为6(4,9)d。病例主要临床症状为皮疹60例(占98.4%)、发热44例(占72.1%)、皮肤瘙痒31例(占50.8%)和淋巴结肿大26例(占42.6%)。结论 山东省猴痘疫情呈散发分布,涉疫人群局限,主要为MSM。建议利用社会组织加强对MSM群体健康教育,加强对医疗机构培训,实现猴痘疫情早发现、早诊断、早治疗,降低疫情传播风险。展开更多
文摘以AnyBody仿真骨骼肌多体逆向动力学三元素肌肉收缩力模型及有限元法构建八段锦动作的三维胫骨模型,全面、客观地计算不同动作最大肌力峰值时刻的积分肌电、力矩、肌肉收缩等生物力学特性.将10例健康青年八段锦志愿者的身高、体质量、髋宽、髋深、膝宽、踝宽等形态学数据作为约束条件,用AnyBody7.1.2软件导出八段锦8个动作下肢最大肌力指标,依据胫骨最大应力约束条件,用Minics 10.01、Geomagic studio 2013、ANSYS 19.2软件建构三维数据,添加AnyBody中的3个方向数据,分析并计算不同动作最大力的应力传导大小、分布规律.研究结果表明:八段锦是左右对称性运动,双侧同块肌肉积分肌电值、肌肉力值无显著性差异,有利于锻炼双下肢稳定性及协调性,运动中人体需要通过移动来保持平衡,膝关节在垂直轴方向力最大,伸展力矩值最大;做八段锦运动过程中,髋关节主导发力肌肉为臀中肌,膝关节主导发力肌肉为比目鱼肌、股外侧肌、腓肠肌,踝关节主导发力肌肉为拇长屈肌;表面肌电验证是评价人体肌肉激活程度的主要方式,八段锦运动中胫骨前肌、腓肠肌、股直肌、股二头肌的肌肉活性仿真结果与积分肌电值具有较高的一致性.以AnyBody软件分析下肢动作特征和有限元软件建构的胫骨模型,适用于八段锦动作的动态研究,可为计算八段锦运动时动力学变化提供新思路与实践价值参考.
基金supported by the China Postdoctoral Science Foundation(grant No.2017M611108)the National Science and Technology Major Project of China(grant No.2016ZX05006006-001)the National Basic Research Program of China(grant Nos.2011CB2011-02 and 2014CB239100)
文摘Previous studies have postulated the contribution of present-day low-total organic carbon(TOC)marine carbonate source rocks to oil accumulations in the Tabei Uplift,Tarim Basin,China.However,not all present-day low-TOC carbonates have generated and expelled hydrocarbons;therefore,to distinguish the source rocks that have already expelled sufficient hydrocarbons from those not expelled hydrocarbons,is crucial in source rock evaluation and resource assessment in the Tabei Uplift.Mass balance can be used to identify modern low-TOC carbonates resulting from hydrocarbon expulsion.However,the process is quite complicated,requiring many parameters and coefficients and thus also a massive data source.In this paper,we provide a quick and cost effective method for identifying carbonate source rock with present-day low TOC,using widely available Rock-Eval data.First,we identify present-day low-TOC carbonate source rocks in typical wells according to the mass balance approach.Second,we build an optimal model to evaluate source rocks from the analysis of the rocks'characteristics and their influencing factors,reported as positive or negative values of a dimensionless index of Rock-Eval data(IR).Positive IR corresponds to those samples which have expelled hydrocarbons.The optimal model optimizes complicated calculations and simulation processes;thus it could be widely applicable and competitive in the evaluation of present-day low TOC carbonates.By applying the model to the Rock-Eval dataset of the Tabei Uplift,we identify present-day iow-TOC carbonate source rocks and primarily evaluate the contribution equivalent of 11.87×10^9 t oil.
基金the funding support from the Project supported by the State Key Program of National Natural Science of China(71433008)
文摘The smart low-carbon development of modern cities has become one of the academic hotspots.However,the dynamics is rarely involved.Therefore,TOPSIS method was used to take a quantitative study on the dynamics of smart low-carbon development for major Chinese cities.The results showed that:(1) 3 main dynamics of smart lowcarbon city development in China are institution and culture conditions,facility and function conditions and economy and industry conditions,but the overall utility is relatively low;(2) the level of dynamic operation mechanism of smart low-carbon development for major Chinese cities is distinct between regions,indicating a spatial law of diminishing from the east to the west and differing within regions;(3) the imbalance of comprehensive dynamic mechanism and operation state between major cities is prominent,showing an urban scale law of decreasing from big to small and differing within each scale and an administration hierarchy law of descending from high to low and differing within each class;(4) 7 basic development patterns can be obtained,and most of the cities take the external strong internal weak mode,which basically matches with its development realities.
文摘目的 了解2023—2024年山东省猴痘病例流行病学特征,为猴痘疫情科学防控提供依据。方法 于中国疾病预防控制信息系统及中国疾病预防控制中心流行病学调查信息系统获取山东省猴痘病例信息及个案调查信息。采用描述性流行病学方法分析猴痘病例流行特征,采用SPSS 25.0统计软件进行统计分析。结果 2023年6月15日青岛市报告山东省首例猴痘确诊病例,截至2024年12月全省累计报告病例61例,无死亡病例。病例均为男性,中位年龄M(P_(25),P_(75))为33(29,38)岁。53例(86.9%)、23例(37.7%)、15例(24.6%)和35例(57.4%)分别自述为男男性行为者(men who have sex with men, MSM)、艾滋病病毒感染者、梅毒感染者和在发病前21 d有同性性接触史。2023年7月达到发病高峰,随后病例逐渐减少至每月3例以下。病例来源涉及山东省的11个地市,山东大学和青岛市共计报告34例(占55.7%),病例均为主动就诊发现,发病至就诊时间间隔M(P_(25),P_(75))为3(2,6)d,发病至诊断时间间隔M(P_(25),P_(75))为6(4,9)d。病例主要临床症状为皮疹60例(占98.4%)、发热44例(占72.1%)、皮肤瘙痒31例(占50.8%)和淋巴结肿大26例(占42.6%)。结论 山东省猴痘疫情呈散发分布,涉疫人群局限,主要为MSM。建议利用社会组织加强对MSM群体健康教育,加强对医疗机构培训,实现猴痘疫情早发现、早诊断、早治疗,降低疫情传播风险。
