Transient Rayleigh wave detection is a high-precision nondestructive detection method.At present,it has been widely used in shallow exploration,but rarely used in tunnel lining quality detection.Through the tunnel lin...Transient Rayleigh wave detection is a high-precision nondestructive detection method.At present,it has been widely used in shallow exploration,but rarely used in tunnel lining quality detection.Through the tunnel lining physical model experiment,the layout defects of the double-layer reinforcement lining area were detected and the Rayleigh wave velocity profile and dispersion curve were analyzed after data process-ing,which finally verified the feasibility and accuracy of Rayleigh wave method in detecting the tunnel lining void area.The results show that the method is not affected by the reinforcement inside the lining,the shallow detection is less disturbed and the accuracy is higher,and the data will fluctuate slightly with the deepening of the detection depth.At the same time,this method responds quite accurately to the thickness of the concrete,allowing for the assessment of the tunnel lining’s lack of compactness.This method has high efficiency,good reliability,and simple data processing,and is suitable for nondestructive detection of internal defects of tun-nel lining structure.展开更多
胆囊癌指发生于胆囊(包括胆囊底部、体部、颈部及胆囊管)的恶性肿瘤。我国胆囊癌发病率低,占同时期胆道疾病的0.4%~3.8%[1]。胆囊透明细胞腺癌(clear cell carcinoma of the gallblad,CCG)是一种含有透明细胞成分(>50%)的胆囊癌,在...胆囊癌指发生于胆囊(包括胆囊底部、体部、颈部及胆囊管)的恶性肿瘤。我国胆囊癌发病率低,占同时期胆道疾病的0.4%~3.8%[1]。胆囊透明细胞腺癌(clear cell carcinoma of the gallblad,CCG)是一种含有透明细胞成分(>50%)的胆囊癌,在临床上极为罕见。据Maharaj等[2]报道,其发病率仅占胆囊癌的1%。现将1例CCG患者报道如下。展开更多
基金Supported by Project of Natural Science Foundation of Jilin Province(No.20220101172JC).
文摘Transient Rayleigh wave detection is a high-precision nondestructive detection method.At present,it has been widely used in shallow exploration,but rarely used in tunnel lining quality detection.Through the tunnel lining physical model experiment,the layout defects of the double-layer reinforcement lining area were detected and the Rayleigh wave velocity profile and dispersion curve were analyzed after data process-ing,which finally verified the feasibility and accuracy of Rayleigh wave method in detecting the tunnel lining void area.The results show that the method is not affected by the reinforcement inside the lining,the shallow detection is less disturbed and the accuracy is higher,and the data will fluctuate slightly with the deepening of the detection depth.At the same time,this method responds quite accurately to the thickness of the concrete,allowing for the assessment of the tunnel lining’s lack of compactness.This method has high efficiency,good reliability,and simple data processing,and is suitable for nondestructive detection of internal defects of tun-nel lining structure.
文摘胆囊癌指发生于胆囊(包括胆囊底部、体部、颈部及胆囊管)的恶性肿瘤。我国胆囊癌发病率低,占同时期胆道疾病的0.4%~3.8%[1]。胆囊透明细胞腺癌(clear cell carcinoma of the gallblad,CCG)是一种含有透明细胞成分(>50%)的胆囊癌,在临床上极为罕见。据Maharaj等[2]报道,其发病率仅占胆囊癌的1%。现将1例CCG患者报道如下。
