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HET-Y(C)型沥青混凝土在提升隧道路面质量中的关键工艺研究
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作者 周勇 邓星鹤 +2 位作者 许新权 李善强 吴传海 《北方交通》 2024年第8期74-77,82,共5页
HET-Y(C)型半开级配沥青混凝土具有较大的孔隙及良好的抗滑能力,能够较好地吸收噪声,解决隧道水泥混凝土路面行车噪声大、抗滑性能衰减快、行车舒适性差等问题。文章依托实体工程进行研究,得到拌和时间、摊铺速度、碾压工艺等影响HET-Y... HET-Y(C)型半开级配沥青混凝土具有较大的孔隙及良好的抗滑能力,能够较好地吸收噪声,解决隧道水泥混凝土路面行车噪声大、抗滑性能衰减快、行车舒适性差等问题。文章依托实体工程进行研究,得到拌和时间、摊铺速度、碾压工艺等影响HET-Y(C)型沥青混凝土路面质量的关键施工参数。通车1年后,路面国际平整度指数约为1.0m/km,横向力系数大于62,等级均为优;100km/h行车速度下路面噪声小于73dB,极大提高了隧道路面的行车安全性及舒适性。 展开更多
关键词 HET-Y(C)型沥青混凝土 隧道路面 降噪
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Open Access Strategy in Cloud Computing-Based Heterogenous Networks Constrained by Wireless Fronthaul
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作者 Zhongyuan Zhao Yong Li +2 位作者 Weiliang Xie Min Wang Wenbo Wang 《China Communications》 SCIE CSCD 2017年第2期143-153,共11页
Cloud computing.based heterogeneous networks(C.Het Nets) have been considered as promising network architecture of future wireless communication systems. However, its performance is constrained by the capability of fr... Cloud computing.based heterogeneous networks(C.Het Nets) have been considered as promising network architecture of future wireless communication systems. However, its performance is constrained by the capability of fronthaul. To study the performance limit of C.Het Nets, the coverage performance of the open access strategy in C.Het Nets is analyzed in this paper. In particular, the non.ideal condition of fronthaul in C.Het Nets is characterized by establishing a stochastic geometry.based model, and a tight lower bound on coverage probability is derived for downlink transmissions. Based on the derived results, the constraint of the fronthaul is given to ensure that open access strategy can achieve the best coverage performance. Finally, the simulation results are provided to verify the theoretical results and show the impact of fronthaul constrains. 展开更多
关键词 c-het Nets open access strategy coverage probability stochastic geometry
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Research on ZnO/Si heterojunction solar cells 被引量:1
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作者 Li Chen Xinliang Chen +2 位作者 Yiming Liu Ying Zhao Xiaodan Zhang 《Journal of Semiconductors》 EI CAS CSCD 2017年第5期62-72,共11页
We put forward an n-ZnO/p-Si heterojunction solar cell model based on AFORS-HET simulations and provide experimental support in this article.ZnO:B(B-doped ZnO) thin films deposited by metal-organic chemical vapor d... We put forward an n-ZnO/p-Si heterojunction solar cell model based on AFORS-HET simulations and provide experimental support in this article.ZnO:B(B-doped ZnO) thin films deposited by metal-organic chemical vapor deposition(MOCVD) are planned to act as electrical emitter layer on p-type c-Si substrate for photovoltaic applications.We investigate the effects of thickness,buffer layer,ZnO:B affinity and work function of electrodes on performances of solar cells through computer simulations using AFORS-HET software package.The energy conversion efficiency of the ZnO:B(n)/ZnO/c-Si(p) solar cell can achieve 17.16%(V(oc):675.8 mV,J(sc):30.24 mA/cm^2,FF:83.96%) via simulation.On a basis of optimized conditions in simulation,we carry out some experiments,which testify that the ZnO buffer layer of 20 nm contributes to improving performances of solar cells.The influences of growth temperature,thickness and diborane(B2H6) flow rates are also discussed.We achieve an appropriate condition for the fabrication of the solar cells using the MOCVD technique.The obtained conversion efficiency reaches2.82%(V(oc):294.4 mV,J(sc):26.108 mA/cm^2,FF:36.66%). 展开更多
关键词 textured surface ZnO films p-type c-Si substrates MOCVD technique AFORS-HET software solar cells
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