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| 1 | Advances in design theories of high-speed railway ballastless tracks显示文摘The design theories of the ballastless track in the world are reviewed in comparison with the innovative research achievements of high-speed railway ballastless track in China.The calculation methods and parameters concerning train load,thermal effect,and foundation deformation of high-speed railway ballastless track,together with the structural design methods are summarized.Finally,some suggestions on the future work are provided. | Xueyi LIU Pingrui ZHAO Feng DAI | 2011 | Journal of Modern Transportation2011，19，3： | 16 |
| 2 | Experimental study of temperature gradient in track slab under outdoor conditions in Chengdu area显示文摘Temperature is one of the important loads for designing slab track. The characteristic of slab track temperature varies greatly with different regional climates. In this work, a bi-block slab track model was built under outdoor conditions in Chengdu area; the statistical characteristic of temperature gradient in track slab and the relationship between temperature gradient and surface air temperature were tested and analyzed. The results show that the track slab temperature gradient will vary periodically according to the surface air temperature, and show a clear nonlinearity along the height direction. The temperature gradient distribution is extremely uneven: the temperature gradient in the top part of the track slab is larger than that in the bottom part; the most frequently occurring temperature gradient of the track slab is around-3.5 °C/m and more than75 % locates in the level-10 to 10 °C/m; concrete with a relatively good heat exchange condition with the surrounding air has a narrower band distribution. In addition, the frequency distribution histogram should exclude the time zone from 00:00 to 06:00 because there is almost no traffic in this period. The amplitude of track slab temperature variation is obviously lower than that of the air temperature variation, and the former is approximately linear with the latter. | Pingrui Zhao Xueyi Liu Guan Liu | 2014 | Journal of Modern Transportation2014，22，3： | 12 |
| 3 | Analysis of fretting wearof type II fastener elastic bar 显示文摘 | Wu Zeng Ning Xiaojun Zhao Pingrui | 2012 | Applied Mechanics and Ma-terials2012，，： | 1 |
| 4 | 显示文摘 | Meng Pingrui Chen Cuixian Yu Lixin | 2000 | Tsinghua Science and Technology2000，5，2： | 1 |
| 5 | High performance top-emitting and transparent white organic light-emitting diodes based on Al/Cu/TcTa transparent electrodes for active matrix displays and lighting applications显示文摘 | Zhensong Zhang Pingrui yan Shouzhen Yue Guohua Xie Yu Chen Qingyang Wu Dalong Qu Yi Zhao Shiyong Liu | 2013 | Organic Electronics2013，，6： | 1 |
| 6 | Recent pro-gress in copper solvent extraction 显示文摘 | Wang Pingrui Lang Huling Liu Du | 1991 | Study of NonferrousChemical Enginerring1991，，2： | 1 |
| 7 | Thermal performance of a single-layer packed metal pebble-bed exposed to high energy fluxes显示文摘It is difficult to accurately measure the temperature of the falling particle receiver since thermocouples may directly be exposed to the solar flux.This study analyzes the thermal performance of a packed bed receiver using large metal spheres to minimize the measurement error of particle temperature with the sphere temperature reaching more than 700°C in experiments in a solar furnace and a solar simulator.The numerical models of a single sphere and multiple spheres are verified by the experiments.The multiple spheres model includes calculations of the external incidence,view factors,and heat transfer.The effects of parameters on the temperature variations of the spheres,the transient thermal efficiency,and the temperature uniformity are investigated,such as the ambient temperature,particle thermal conductivity,energy flux,sphere diameter,and sphere emissivity.When the convection is not considered,the results show that the sphere emissivity has a significant influence on the transient thermal efficiency and that the temperature uniformity is strongly affected by the energy flux,sphere diameter,and sphere emissivity.As the emissivity increases from 0.5 to 0.9,the transient thermal efficiency and the average temperature variance increase from 53.5%to 75.7%and from 14.3%to 27.1%at 3.9 min,respectively.The average temperature variance decreases from 29.7%to 9.3%at 2.2 min with the sphere diameter increasing from 28.57 mm to 50 mm.As the dimensionless energy flux increases from 0.8 to 1.2,the average temperature variance increases from 13.4%to 26.6%at 3.4 min. | Shengchun ZHANG Zhifeng WANG Hui BIAN Pingrui HUANG | 2021 | Frontiers in Energy2021，15，2： | 0 |
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