http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Surface Parameter Measurement of Braided Composite Preform Based on Faster R-CNN
Zhitao Xiao,Lei Pei,Lei Geng,Ying Sun,Fang Zhang,Jun Wu 한국섬유공학회 2020 Fibers and polymers Vol.21 No.3
Pitch length and surface braiding angle are two important parameters of braided composite preforms. In this paper,a method based on Faster R-CNN is proposed to measure the two parameters. First, after image acquisition, a fabric imagedatabase including initial cropped images, augmented images, and target images is established. Then, the target images areclassified into four categories according to the gray change characteristics. Third, a Faster R-CNN fabric detection model istrained on the fabric image database. Fourth, targets are detected by the trained network, and corners are detected based onthe detected targets. Finally, pitch lengths and surface braiding angles are measured based on the detected corners. Experimental results show that the proposed method achieves the automatic measurement of pitch lengths and surfacebraiding angles of 2D and 3D braided composite preforms with high accuracy.
Xin Fu,Yuan Liu,Zhitao Wu,He Zhang 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.4
A simple, highly sensitive and selective method based on the rhodamine B-covered gold nanoparticle with dual-readout (colorimetric and fluorometric) detection for L-cysteine is proposed. A mechanism is that citratestabilized AuNPs were modified with RB by electrostatic interaction, which enables the nanometal surface energy transfer (NSET) from the RB to the AuNPs, quenching the fluorescence. In the presence of L-cysteine, it was used as a competitor in the NSET by the strongly Au-S bonding to release RB from the Au surface and recover the fluorescence, and the red-to-purple color change quickly, which was monitored simply by the naked eye. Under the optimum conditions, the detection limit is as low as 10 nM. The method possessed the advantages of simplicity, rapidity and sensitivity at the same time. The method was also successfully applied to the determination of L-cysteine in human urine samples, and the results were satisfying.
Fu, Xin,Liu, Yuan,Wu, Zhitao,Zhang, He Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.4
A simple, highly sensitive and selective method based on the rhodamine B-covered gold nanoparticle with dual-readout (colorimetric and fluorometric) detection for $\small{L}$-cysteine is proposed. A mechanism is that citrate-stabilized AuNPs were modified with RB by electrostatic interaction, which enables the nanometal surface energy transfer (NSET) from the RB to the AuNPs, quenching the fluorescence. In the presence of $\small{L}$-cysteine, it was used as a competitor in the NSET by the strongly Au-S bonding to release RB from the Au surface and recover the fluorescence, and the red-to-purple color change quickly, which was monitored simply by the naked eye. Under the optimum conditions, the detection limit is as low as 10 nM. The method possessed the advantages of simplicity, rapidity and sensitivity at the same time. The method was also successfully applied to the determination of $\small{L}$-cysteine in human urine samples, and the results were satisfying.