In this paper,we study the asymptotic relation between the first crossing point and the last exit time for Gaussian order statistics which are generated by stationary weakly and strongly dependent Gaussian sequences.I...In this paper,we study the asymptotic relation between the first crossing point and the last exit time for Gaussian order statistics which are generated by stationary weakly and strongly dependent Gaussian sequences.It is shown that the first crossing point and the last exit time are asymptotically independent and dependent for weakly and strongly dependent cases,respectively.The asymptotic relations between the first crossing point and the last exit time for stationary weakly and strongly dependent Gaussian sequences are also obtained.展开更多
废弃轮胎橡胶颗粒轻质混合土(简称RST轻质土)是由原料土、废弃轮胎橡胶颗粒、水泥和水按照一定比例混合而成的。RST轻质土可用于路基填土、管道回填和防止桥头跳车等工程中,因此,研究其在动荷载作用下的变形特性具有重要的理论意义和工...废弃轮胎橡胶颗粒轻质混合土(简称RST轻质土)是由原料土、废弃轮胎橡胶颗粒、水泥和水按照一定比例混合而成的。RST轻质土可用于路基填土、管道回填和防止桥头跳车等工程中,因此,研究其在动荷载作用下的变形特性具有重要的理论意义和工程应用价值。首先对RST轻质土的原材料进行了物理性质研究,然后进行了试样配比方案和试验加载方案的设计,最后通过室内动三轴试验研究了围压、橡胶颗粒含量、水泥掺入量对RST轻质土动变形特性的影响规律。研究结果表明:不同围压下RST轻质土的动应力–应变关系呈双曲线,在相同动应力条件下,RST轻质土的动应变随围压和水泥掺入量的增大而减小;在相同应变条件下,RST轻质土的动弹性模量随围压和水泥掺入量的增大而变大,随橡胶颗粒含量的增加而减小,且橡胶颗粒掺入量增多时,d d E-?曲线趋于平缓。展开更多
基金Supported by the National Natural Science Foundation of China(11501250)Zhejiang Provincial Natural Science Foundation of China(LY18A010020)Innovation of Jiaxing City:a program to support the talented persons。
文摘In this paper,we study the asymptotic relation between the first crossing point and the last exit time for Gaussian order statistics which are generated by stationary weakly and strongly dependent Gaussian sequences.It is shown that the first crossing point and the last exit time are asymptotically independent and dependent for weakly and strongly dependent cases,respectively.The asymptotic relations between the first crossing point and the last exit time for stationary weakly and strongly dependent Gaussian sequences are also obtained.
文摘废弃轮胎橡胶颗粒轻质混合土(简称RST轻质土)是由原料土、废弃轮胎橡胶颗粒、水泥和水按照一定比例混合而成的。RST轻质土可用于路基填土、管道回填和防止桥头跳车等工程中,因此,研究其在动荷载作用下的变形特性具有重要的理论意义和工程应用价值。首先对RST轻质土的原材料进行了物理性质研究,然后进行了试样配比方案和试验加载方案的设计,最后通过室内动三轴试验研究了围压、橡胶颗粒含量、水泥掺入量对RST轻质土动变形特性的影响规律。研究结果表明:不同围压下RST轻质土的动应力–应变关系呈双曲线,在相同动应力条件下,RST轻质土的动应变随围压和水泥掺入量的增大而减小;在相同应变条件下,RST轻质土的动弹性模量随围压和水泥掺入量的增大而变大,随橡胶颗粒含量的增加而减小,且橡胶颗粒掺入量增多时,d d E-?曲线趋于平缓。