Conventional optimal sensor placement(OSP)methods employ the premise that all sensors work perfectly during long-term structural monitoring.However,this premise is often difficult to fulfill in real applications due t...Conventional optimal sensor placement(OSP)methods employ the premise that all sensors work perfectly during long-term structural monitoring.However,this premise is often difficult to fulfill in real applications due to poor manufacturing and material aging of sensors,human damage,and electromagnetic interference.This paper presents a robustness-oriented OSP method that considers sensor failures.The OSP problem is designed with consideration of sensor failures to ensure that both complete vibration data collected by all sensors and incomplete vibration data caused by individual sensor failures can accurately identify structural modal parameters.A dispersion-aggregation firefly algorithm(DAFA),which is derived from the basic firefly algorithm,has been proposed to solve this complicated optimization problem.The dispersion and aggregation operators are designed to prevent falling into local optima and to rapidly converge to the global optima.The proposed methodology is confirmed by extracting the robust sensor configuration for a long-span cable-stayed bridge.The robustness of the optimal sensor configurations against sensor failure is thoroughly explored,and the performance of the proposed DAFA is extensively examined.展开更多
目的探讨小而密低密度脂蛋白胆固醇(small dense low density lipoprotein-cholesterol,sdLDL-C)水平及其比值与2型糖尿病患者血糖控制程度的相关性。方法回顾性选取2023年9月—2024年8月在江苏省太湖康复医院体检的2683例糖尿病患者的...目的探讨小而密低密度脂蛋白胆固醇(small dense low density lipoprotein-cholesterol,sdLDL-C)水平及其比值与2型糖尿病患者血糖控制程度的相关性。方法回顾性选取2023年9月—2024年8月在江苏省太湖康复医院体检的2683例糖尿病患者的临床资料,依据糖化血红蛋白及空腹血糖水平将血糖控制程度分为理想组、良好组及不佳组,采用分层随机抽样方法每组纳入患者100例。分析3组sdLDL-C、sdLDL-C/低密度脂蛋白胆固醇(low density lipoprotein-cholesterol,LDL-C)、sdLDL-C/高密度脂蛋白胆固醇(high density lipoprotein-cholesterol,HDL-C)及sdLDL-C/载脂蛋白B(apolipoprotein,ApoB)的水平,并采用Pearson相关系数分析sdLDL-C及其比值与2型糖尿病患者血糖控制程度的相关性。结果3组sdLDL-C、sdLDL-C/HDL-C、sdLDL-C/LDL-C比较,差异均有统计学意义(P均<0.05)。3组sdLDL-C/ApoB比较,差异无统计学意义(P>0.05)。sdLDL-C、sdLDL-C/HDL-C与2型糖尿病血糖控制程度呈正相关,sdLDL-C/LDL-C与2型糖尿病血糖控制程度无明显相关性。结论sdLDL-C水平及其sdLDL-C/HDL-C与2型糖尿病患者血糖控制程度存在一定的相关性。展开更多
文摘目的探讨带线锚钉重建三角韧带(deltoid ligament)对踝关节骨折合并韧带损伤患者多维运动功能的影响。方法采用回顾性研究方法,纳入2023年3月至2024年3月期间在医院接受切开复位内固定术治疗的DL损伤合并关节骨折患者共210例。根据是否接受三角韧带重建分为重建组(110例)和对照组(单纯骨折固定,100例),其中重建组失访4例,对照组失访2例。比较两组术后优良率,并于术前及术后3、6、12个月评估六自由度(Six Degrees of Freedom,6DOF)运动参数、美国足踝外科协会评分(AOFAS)、疼痛视觉模拟评分(VAS)及影像学指标(间踝间隙和距骨倾斜角),同时记录术后并发症发生率。结果重建组手术时间、术中出血量和住院时间均显著高于对照组(P<0.001)。术后12个月,重建组优良率显著高于对照组(93.40%vs.81.63%,P<0.05)。两组术后所有评估指标随时间持续改善,且重建组在踝关节6DOF运动参数(内旋/外旋、背伸/跖屈、内翻/外翻、上移/下移、内移/外移、前移/后移)、AOFAS评分及VAS评分方面改善程度均优于对照组(P<0.001)。影像学结果显示,重建组间踝间隙及距骨倾斜角恢复更佳(P<0.001)。两组术后并发症发生率差异无统计学意义(P>0.05)。结论在关节骨折合并三角韧带损伤的治疗中,带线锚钉重建三角韧带可有效改善踝关节运动功能,提高AOFAS评分,减轻疼痛,促进影像学复位,且不增加术后并发症风险,是治疗此类损伤的安全有效方法。
基金The National Natural Science Foundation of China(No.51978243,52578360).
文摘Conventional optimal sensor placement(OSP)methods employ the premise that all sensors work perfectly during long-term structural monitoring.However,this premise is often difficult to fulfill in real applications due to poor manufacturing and material aging of sensors,human damage,and electromagnetic interference.This paper presents a robustness-oriented OSP method that considers sensor failures.The OSP problem is designed with consideration of sensor failures to ensure that both complete vibration data collected by all sensors and incomplete vibration data caused by individual sensor failures can accurately identify structural modal parameters.A dispersion-aggregation firefly algorithm(DAFA),which is derived from the basic firefly algorithm,has been proposed to solve this complicated optimization problem.The dispersion and aggregation operators are designed to prevent falling into local optima and to rapidly converge to the global optima.The proposed methodology is confirmed by extracting the robust sensor configuration for a long-span cable-stayed bridge.The robustness of the optimal sensor configurations against sensor failure is thoroughly explored,and the performance of the proposed DAFA is extensively examined.
文摘目的探讨小而密低密度脂蛋白胆固醇(small dense low density lipoprotein-cholesterol,sdLDL-C)水平及其比值与2型糖尿病患者血糖控制程度的相关性。方法回顾性选取2023年9月—2024年8月在江苏省太湖康复医院体检的2683例糖尿病患者的临床资料,依据糖化血红蛋白及空腹血糖水平将血糖控制程度分为理想组、良好组及不佳组,采用分层随机抽样方法每组纳入患者100例。分析3组sdLDL-C、sdLDL-C/低密度脂蛋白胆固醇(low density lipoprotein-cholesterol,LDL-C)、sdLDL-C/高密度脂蛋白胆固醇(high density lipoprotein-cholesterol,HDL-C)及sdLDL-C/载脂蛋白B(apolipoprotein,ApoB)的水平,并采用Pearson相关系数分析sdLDL-C及其比值与2型糖尿病患者血糖控制程度的相关性。结果3组sdLDL-C、sdLDL-C/HDL-C、sdLDL-C/LDL-C比较,差异均有统计学意义(P均<0.05)。3组sdLDL-C/ApoB比较,差异无统计学意义(P>0.05)。sdLDL-C、sdLDL-C/HDL-C与2型糖尿病血糖控制程度呈正相关,sdLDL-C/LDL-C与2型糖尿病血糖控制程度无明显相关性。结论sdLDL-C水平及其sdLDL-C/HDL-C与2型糖尿病患者血糖控制程度存在一定的相关性。
