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Seismic signal recognition using improved BP neural network and combined feature extraction methodPENG Zhao-qin(彭朝琴)1, CAO Chun(曹纯)1, HUANG Jiao-ying(黄姣英)2, LIU Qiu-sheng(刘秋生)3(1. School... and vehicle was acquisitioned from the seismic sensor, and then feature vectors were extracted with combined methods after filter processing. Finally, these features were put into the improved BP neural network......
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Study on dynamic fracture behavior of TA15ELI alloy under mode-Ⅱ loading by caustics methodLIU Rui,HUI Songxiao,YE Wenjun,MI Xujun,XIONG Baiqing,and YOU Zhenping State Key Laboratory for Fabrication & Processing of Nonferrous Metals,General Research Institute for Nonferrous Metals,Beijing 100088,China摘 要:The dynamic fracture behavior of TA15ELI......
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Effect of Cr on Microstructure and Fracture Toughness of Nb-20Ti-16Si-xCr Alloys () 摘要:The present paper reported the phase stability and microstructures evolution of Nb-20Ti-16Si-xCr (x = 0~20at... than 5% in Nb-20Ti-16Si-xCr alloys could result in the formation of Cr-rich Laves phase. In addition, the influence of Cr addition on the room temperature fracture toughness of the alloys after......
Effect of Alloying on the Microstructure and Fracture Toughness of Nb-Mo-Si Alloys () 摘要:It was found that typical Nb_(ss) /Nb_5Si_3 eutectic lamellar structure formed in the Nb-Mo-Si alloy... structure. The microstructural characterization and the fracture toughness of Nb-17Si-10Mo ternary alloy doped with Ga, In, Zn and V, respectively, were investigated. It was revealed that the lamellar......
Radar emitter signal recognition based on multi-scale wavelet entropy and feature weightingLI Yi-bing(李一兵), GE Juan(葛娟), LIN Yun(林云), YE Fang(叶方) (Department of Information and Communication...-resolution wavelet analysis, an adaptive radar emitter signal recognition method based on multi-scale wavelet entropy feature extraction and feature weighting was proposed. With the only priori knowledge......
J. Cent. South Univ. (2020) 27: 1846-1860 DOI: https://doi.org/10.1007/s11771-020-4412-0 Fracture evolution in coalbed methane reservoirs subjected to liquid nitrogen thermal shocking YAN Hong(严红... after LN2 thermal shocking treatments. LN2 thermal shocking leads to a denser fracture network than its original state with coal porosity growth rate increasing up to 183.3%. The surface porosity......
Tensile and fracture properties of Ti-62A alloy plate with different microstructuresLIU Rui, HUI Songxiao, YE Wenjun, YU Yang, FU Yanyan, SONG Xiaoyun, and DENG Xiguang State Key Laboratory... of microstructure, fully equiaxed, bimodal, and Widmanst tten, were obtained by various heat treatments to investigate the effects of microstructure on the tensile and fracture properties at room......
with that of the original casing and PD casing, the dynamic fracture toughness decreases further when the PD casing immersed in H2 S, moreover, there are ridge-shaped feature and many secondary cracks...Effect of Plastic Deformation and H2S on Dynamic Fracture Toughness of High Strength Casing Steel曾德智1,ZHANG Naiyan1,TIAN Gang2,HU Junying1,ZHANG Zhi1,SHI Taihe11. State Key Laboratory of Oil & Gas......