Steel-concrete composite structures(SCCS)have been widely used as primary load-bearing components in large-scale civil infrastructures.As the basis of the co-working ability of steel plate and concrete,the bonding sta...Steel-concrete composite structures(SCCS)have been widely used as primary load-bearing components in large-scale civil infrastructures.As the basis of the co-working ability of steel plate and concrete,the bonding status plays an essential role in guaranteeing the structural performance of SCCS.Accordingly,efficient non-destructive testing(NDT)on interfacial debondings in SCCS has become a prominent research area.Multi-channel analysis of surface waves(MASW)has been validated as an effective NDT technique for interfacial debonding detection for SCCS.However,the feasibility of MASW must be validated using experimental measurements.This study establishes a high-frequency data synchronous acquisition system with 32 channels to perform comparative verification experiments in depth.First,the current sensing approaches for high-frequency vibration and stress waves are summarized.Secondly,three types of contact sensors,namely,piezoelectric lead-zirconate-titanate(PZT)patches,accelerometers,and ultrasonic transducers,are selected for MASW measurement.Then,the selection and optimization of the force hammer head are performed.Comparative experiments are carried out for the optimal selection of ultrasonic transducers,PZT patches,and accelerometers for MASW measurement.In addition,the influence of different pasting methods on the output signal of the sensor array is discussed.Experimental results indicate that optimized PZT patches,acceleration sensors,and ultrasonic transducers can provide efficient data acquisition for MASW-based non-destructive experiments.The research findings in this study lay a solid foundation for analyzing the recognition accuracy of contact MASW measurement using different sensor arrays.展开更多
目的评估胃泌素释放肽前体(Pro-gastrin-releasing peptide,PRO-GRP)、神经元特异性烯醇酶(Neuron-specific enolase,NSE)、癌胚抗原(Carcinoembryonic antigen,CEA)、细胞角蛋白-19片段21-1(Cytokeratin-19 fragment 21-1,CYFRA21-1)...目的评估胃泌素释放肽前体(Pro-gastrin-releasing peptide,PRO-GRP)、神经元特异性烯醇酶(Neuron-specific enolase,NSE)、癌胚抗原(Carcinoembryonic antigen,CEA)、细胞角蛋白-19片段21-1(Cytokeratin-19 fragment 21-1,CYFRA21-1)及鳞状细胞癌抗原(Squamous cell carcinoma antigen,SCC)血清肿瘤标志物在肺癌早期诊断中的价值,并探究它们作为诊断指标的组合效应。方法选择2020年1月至2022年10月期间收治的60例肺癌患者作为阳性组,同时纳入90例良性肺疾病患者作为阴性组。所有患者均接受血清肿瘤标志物检测,检测方法为免疫化学发光法,检测指标包括:PRO-GRP、NSE、CEA、CYFRA21-1及SCC。比较两组患者血清标志物的含量,并分析其阴阳表达情况。利用二元多因素回归分析,将这些标志物作为自变量,是否诊断为肺癌阳性作为因变量,探究其对肺癌诊断的独立危险因素。应用ROC曲线分析评估单独及联合检测这些标志物对肺癌的诊断价值,统计ROC曲线下面积(Area Under the Curve,AUC)、敏感度和特异度。结果阳性组患者的血清PRO-GRP、NSE、CEA、CYFRA21-1、SCC含量均显著高于阴性组(P<0.05)。单因素分析结果显示,这些标志物均为影响肺癌诊断结果的可疑因素(P<0.05)。多因素分析结果表明,它们在肺癌诊断为阳性时均为独立的危险因素(P<0.05)。ROC曲线分析显示,PRO-GRP、NSE、CEA、CYFRA21-1、SCC的单独及联合检测在肺癌诊断中具有统计学意义(P<0.05)。联合预测因子的AUC、敏感度和特异度均高于单独检测指标。结论PRO-GRP、NSE、CEA、CYFRA21-1及SCC血清肿瘤标志物在肺癌早期诊断中具有重要的诊断价值。联合检测这可以提高肺癌早期诊断的准确性,成为有力的肺癌筛查和早期诊断工具。展开更多
基金National Natural Science Foundation of China under Grant (Nos.52192662,52020105005,51908320)the Beijing Nova Program under Grant No.20220484012+1 种基金the Interdisciplinary Research Project for Young Teachers of USTB (Fundamental Research Funds for the Central Universities,FRF-IDRY-22-013)the Key Laboratory for Intelligent Infrastructure and Monitoring of Fujian Province (Huaqiao University,IIM-01-05)。
文摘Steel-concrete composite structures(SCCS)have been widely used as primary load-bearing components in large-scale civil infrastructures.As the basis of the co-working ability of steel plate and concrete,the bonding status plays an essential role in guaranteeing the structural performance of SCCS.Accordingly,efficient non-destructive testing(NDT)on interfacial debondings in SCCS has become a prominent research area.Multi-channel analysis of surface waves(MASW)has been validated as an effective NDT technique for interfacial debonding detection for SCCS.However,the feasibility of MASW must be validated using experimental measurements.This study establishes a high-frequency data synchronous acquisition system with 32 channels to perform comparative verification experiments in depth.First,the current sensing approaches for high-frequency vibration and stress waves are summarized.Secondly,three types of contact sensors,namely,piezoelectric lead-zirconate-titanate(PZT)patches,accelerometers,and ultrasonic transducers,are selected for MASW measurement.Then,the selection and optimization of the force hammer head are performed.Comparative experiments are carried out for the optimal selection of ultrasonic transducers,PZT patches,and accelerometers for MASW measurement.In addition,the influence of different pasting methods on the output signal of the sensor array is discussed.Experimental results indicate that optimized PZT patches,acceleration sensors,and ultrasonic transducers can provide efficient data acquisition for MASW-based non-destructive experiments.The research findings in this study lay a solid foundation for analyzing the recognition accuracy of contact MASW measurement using different sensor arrays.
文摘目的评估胃泌素释放肽前体(Pro-gastrin-releasing peptide,PRO-GRP)、神经元特异性烯醇酶(Neuron-specific enolase,NSE)、癌胚抗原(Carcinoembryonic antigen,CEA)、细胞角蛋白-19片段21-1(Cytokeratin-19 fragment 21-1,CYFRA21-1)及鳞状细胞癌抗原(Squamous cell carcinoma antigen,SCC)血清肿瘤标志物在肺癌早期诊断中的价值,并探究它们作为诊断指标的组合效应。方法选择2020年1月至2022年10月期间收治的60例肺癌患者作为阳性组,同时纳入90例良性肺疾病患者作为阴性组。所有患者均接受血清肿瘤标志物检测,检测方法为免疫化学发光法,检测指标包括:PRO-GRP、NSE、CEA、CYFRA21-1及SCC。比较两组患者血清标志物的含量,并分析其阴阳表达情况。利用二元多因素回归分析,将这些标志物作为自变量,是否诊断为肺癌阳性作为因变量,探究其对肺癌诊断的独立危险因素。应用ROC曲线分析评估单独及联合检测这些标志物对肺癌的诊断价值,统计ROC曲线下面积(Area Under the Curve,AUC)、敏感度和特异度。结果阳性组患者的血清PRO-GRP、NSE、CEA、CYFRA21-1、SCC含量均显著高于阴性组(P<0.05)。单因素分析结果显示,这些标志物均为影响肺癌诊断结果的可疑因素(P<0.05)。多因素分析结果表明,它们在肺癌诊断为阳性时均为独立的危险因素(P<0.05)。ROC曲线分析显示,PRO-GRP、NSE、CEA、CYFRA21-1、SCC的单独及联合检测在肺癌诊断中具有统计学意义(P<0.05)。联合预测因子的AUC、敏感度和特异度均高于单独检测指标。结论PRO-GRP、NSE、CEA、CYFRA21-1及SCC血清肿瘤标志物在肺癌早期诊断中具有重要的诊断价值。联合检测这可以提高肺癌早期诊断的准确性,成为有力的肺癌筛查和早期诊断工具。
