The performance evaluation and chemical property analysis of the recycled warm mix asphalt （RWMA） binders containing 100% artificial reclaimed asphalt （ RA） are presented, and the combined effects of different p...The performance evaluation and chemical property analysis of the recycled warm mix asphalt （RWMA） binders containing 100% artificial reclaimed asphalt （ RA） are presented, and the combined effects of different percentages of the rejuvenator and warm mix additive （WMA） additives on RWMA binders are analyzed through laboratory tests. Three types of WMA additives ad one commercial rejuvenator named GST were selected to restore the artificial RA. The laboratory performace tests including the penetration test, softening test ad rotary, viscosity （RV） test were carried out. In addition, the Fourier transform infrared spectroscopy （FTIR） test was performed to explore the chemical property of RWMA binders. The results of the performance tests indicate that the rejuvenator GST has the ability to restore the artificial RA; choosing the optimum content of WMA additives and rejuvenator is the key to restoring 100% artificial RA, since the combined effects of them play an important role in determining the basic laboratory performance of RWMA binders. The FTIR tests show that the process of recycling mainly adjusts the chemical component of aged asphalt and no remarkable change is observed in the FTI1R spectra of RWMA binders in terms of chemical functional groups with the introduction of WMA additives.展开更多
犯罪分布预测问题对社会稳定有积极影响,在学术界引起了广泛关注。现有的研究方法并不能很好的适用于本文所用的数据集。因此,本文构建了矢量运动模型,并提出了一种名为TPML-WMA(Transition Probability Matrix Learning and Weighted M...犯罪分布预测问题对社会稳定有积极影响,在学术界引起了广泛关注。现有的研究方法并不能很好的适用于本文所用的数据集。因此,本文构建了矢量运动模型,并提出了一种名为TPML-WMA(Transition Probability Matrix Learning and Weighted Moving Average)的新算法,利用此算法去学习转移概率矩阵,然后对得到的矩阵做加权移动处理,进而来预测未来的犯罪率分布。本文所用数据集是中国某市2001年到2011年共11年间盗窃案发生的数据集,在此之上本文建立了VM(Vector Motion)模型,提出了TPML-WMA算法对犯罪率进行预测,并讨论了不同初始条件下算法的性能。本文还将所提出的算法与基于最小二乘法的经典线性回归方法进行比较。拟合的结果表明TPML-WMA模型的预测性能较线性回归模型有了很大提升。展开更多
The objective of this study was to investigate and evaluate the rheological and moisture susceptibility of the WMA mixtures containing moist aggregates. The experimental design included the utilizations of two aggrega...The objective of this study was to investigate and evaluate the rheological and moisture susceptibility of the WMA mixtures containing moist aggregates. The experimental design included the utilizations of two aggregate sources, two moisture, two anti-stripping additives, and three WMA additives and control. Several properties of the binders and mixtures were obtained including： viscosity, dynamic shear rheometer, beam bending rheometer of WMA binders, indirect tensile strength （ITS）, tensile strength ratio （TSR）, and flow values. The experimental results indicate that the WMA additives can result in a slight decrease in viscosity and an increase in failure temperature. In addition, the moisture susceptibility results illustrated that the mixtures containing moist aggregates generally have similar ITS values to other mixtures regardless of HMA or WMA types. Moreover, there were no significant differences in the wet ITS values of WMA mixture amongst four types of mixtures under identical conditions （same moisture and lime contents） except for the mixtures containing liquid anti-stripping additive and Asphamin additive.展开更多
基金The National Natural Science Foundation of China(No.50578031)
文摘The performance evaluation and chemical property analysis of the recycled warm mix asphalt （RWMA） binders containing 100% artificial reclaimed asphalt （ RA） are presented, and the combined effects of different percentages of the rejuvenator and warm mix additive （WMA） additives on RWMA binders are analyzed through laboratory tests. Three types of WMA additives ad one commercial rejuvenator named GST were selected to restore the artificial RA. The laboratory performace tests including the penetration test, softening test ad rotary, viscosity （RV） test were carried out. In addition, the Fourier transform infrared spectroscopy （FTIR） test was performed to explore the chemical property of RWMA binders. The results of the performance tests indicate that the rejuvenator GST has the ability to restore the artificial RA; choosing the optimum content of WMA additives and rejuvenator is the key to restoring 100% artificial RA, since the combined effects of them play an important role in determining the basic laboratory performance of RWMA binders. The FTIR tests show that the process of recycling mainly adjusts the chemical component of aged asphalt and no remarkable change is observed in the FTI1R spectra of RWMA binders in terms of chemical functional groups with the introduction of WMA additives.
文摘犯罪分布预测问题对社会稳定有积极影响,在学术界引起了广泛关注。现有的研究方法并不能很好的适用于本文所用的数据集。因此,本文构建了矢量运动模型,并提出了一种名为TPML-WMA(Transition Probability Matrix Learning and Weighted Moving Average)的新算法,利用此算法去学习转移概率矩阵,然后对得到的矩阵做加权移动处理,进而来预测未来的犯罪率分布。本文所用数据集是中国某市2001年到2011年共11年间盗窃案发生的数据集,在此之上本文建立了VM(Vector Motion)模型,提出了TPML-WMA算法对犯罪率进行预测,并讨论了不同初始条件下算法的性能。本文还将所提出的算法与基于最小二乘法的经典线性回归方法进行比较。拟合的结果表明TPML-WMA模型的预测性能较线性回归模型有了很大提升。
文摘The objective of this study was to investigate and evaluate the rheological and moisture susceptibility of the WMA mixtures containing moist aggregates. The experimental design included the utilizations of two aggregate sources, two moisture, two anti-stripping additives, and three WMA additives and control. Several properties of the binders and mixtures were obtained including： viscosity, dynamic shear rheometer, beam bending rheometer of WMA binders, indirect tensile strength （ITS）, tensile strength ratio （TSR）, and flow values. The experimental results indicate that the WMA additives can result in a slight decrease in viscosity and an increase in failure temperature. In addition, the moisture susceptibility results illustrated that the mixtures containing moist aggregates generally have similar ITS values to other mixtures regardless of HMA or WMA types. Moreover, there were no significant differences in the wet ITS values of WMA mixture amongst four types of mixtures under identical conditions （same moisture and lime contents） except for the mixtures containing liquid anti-stripping additive and Asphamin additive.
