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with increase of the intermediate principal stress. The fatigue failure characteristics of the rocks in biaxial fatigue tests are functions of the peak value of fatigue loads, the intermediate principal stress and the rock lithology. With the increase of the peak values of fatigue loads, the fatigue lives of rocks decrease. The intermediate principal stress strengthens the resistance ability of rocks......
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Predicting configuration performance of modular product family using principal component analysis and support vector machineZHANG Meng(张萌), LI Guo-xi(李国喜), GONG Jing-zhong(龚京忠), WU Bao-zhong(吴宝中... of principal component analysis (PCA) and support vector machine (SVM) was proposed. This method can estimate the performance parameter values of a newly configured product through soft computing technique......
Effect of Strain Rate on Compression Behavior of Vinyl Ester Resin Casting MAO Ming-zhong1,XU Xian-jian1,XIONG Jie1,XIONG Tao1,ZHOU Kai1,YANG Bin1 (1.Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China) 摘要:Quasi-static and high strain rate compressive experiments on vinyl ester casting were......
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DYNAMIC STRAIN AGING BEHAVIOR OF K40S ALLOY X.F.Sun1,F.M.Yang1,Z.Q.Hu1,H.R.Guan1 (1.Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016, China) Abstract:The dynamic strain aging behavior during tensile tests of K40S alloy has been investigated in the temperature range of 25-1100℃ with the strain rate range from 10-4to 10-3 s-1. The results show that four different......
and Actinobacteria. At the genus level, Acidithiobacillus is the dominant group in both YTW and QBS samples, while Spingomonas is dominant in YGX sample. Moreover, the principal component analysis (PCA... than that of pure culture Acidithiobacillus ferrooxidans. Key words: microbial community diversity; PCR-RFLP; principal component analysis; chalcopyrite; bioleaching......
要求.该组细观参数可以用于模拟室内试验所用砂岩的力学特性,在此基础上进行PFC3D数值对比试验,模拟试验加载,卸载步骤参照室内试验方案执行. 表3 PFC3D细观参数 Table 3 Mesoscopic parameters of PFC3D 表4 加载条件下模拟试验和室内试验峰值应力,应变对比 Table 4 Comparison of peak stress and strain...变曲线 Fig. 6 Stress-strain curves of laboratory test and simulation test 图7 室内试验与模拟试验破坏模式 Fig. 7 Failure modes of laboratory test and simulation test 图7所示为σ30=5 MPa,σ20=11 MPa,σ10=20 MPa时室内与模拟卸载试验破坏模式......
J. Cent. South Univ. Technol. (2010) 17: 666-673 DOI: 10.1007/s11771-010-0538-9 Effect of strain hardening and strain softening on welding distortion and residual stress of A7N01-T4 aluminum alloy...; Abstract: The effect of strain hardening and strain softening behavior of flow stress......
Real-time lane departure warning system based on principal component analysis of grayscale distribution and risk evaluation modelZHANG Wei-wei(张伟伟), SONG Xiao-lin(宋晓琳), ZHANG Gui-xiang(张桂香) (State... information, lane boundaries were detected based on principal component analysis of grayscale distribution in search bars of given number and then each search bar was tracked using Kalman filter between......