Zobrazeno 1 - 10
of 504
pro vyhledávání: '"Xu Yidong"'
Publikováno v:
Ceramics-Silikáty, Vol 67, Iss 1, Pp 64-72 (2023)
The synergistic effects of alkali and sulfate activators on the flexural and compressive strengths of manufactured cementitious composites comprising slag, fly ash and cement were studied in the present manuscript. The experimental procedure used a c
Externí odkaz:
https://doaj.org/article/30cbc5d8e2e441b8954d13ccc9c751b1
Publikováno v:
Ceramics-Silikáty, Vol 66, Iss 1, Pp 36-42 (2022)
In this paper, the strength grade and surface roughness of damaged concrete are used as controlling factors to explore their influence on the bonding behaviour of concrete repaired using epoxy-based concrete. Using X-ray photoelectron spectroscopy (X
Externí odkaz:
https://doaj.org/article/b812745c115b4f17b2b949ba773502db
Publikováno v:
Ceramics-Silikáty, Vol 65, Iss 4, Pp 326-333 (2021)
In this paper, a new epoxy-based concrete for bridge expansion joint rapid repair (EJR) has been prepared, and the fatigue performance of the EJR and the repaired concrete members are investigated. The results show that the EJR has excellent fatigue
Externí odkaz:
https://doaj.org/article/61bae884dff1482891767f5a2a81ee74
The 21-cm forest is a sensitive probe for the early heating process and small-scale structures during the epoch of reionization (EoR), to be realized with the upcoming Square Kilometre Array (SKA). Its detection relies on the availability of radio-br
Externí odkaz:
http://arxiv.org/abs/2407.18136
Autor:
Hu, Wenkai, Wang, Yougang, Li, Yichao, Pen, Ue-Li, Wang, Jie, Jing, Yingjie, Zhu, Ming, Zhang, Xin, Yang, Wenxiu, Xu, Yidong, Chen, Xu, Chen, Jingze, Zheng, Zheng, Li, Di, Chen, Xuelei
We present an extragalactic HI 21-cm absorption lines catalog from a blind search at z $\leq$ 0.35, using drift-scan data collected in 1616.9 hours by the ongoing Commensal Radio Astronomy FasT Survey (CRAFTS) and FAST All Sky HI Survey (FASHI), whic
Externí odkaz:
http://arxiv.org/abs/2407.14411
The hyperfine structure absorption lines of neutral hydrogen in spectra of high-redshift radio sources, known collectively as the 21-cm forest, have been demonstrated as a sensitive probe to the small-scale structures governed by the dark matter (DM)
Externí odkaz:
http://arxiv.org/abs/2407.14298
Autor:
Liu, Tianyang, Zhang, Jiajun, Shi, Yuan, Gu, Junhua, Guo, Quan, Xu, Yidong, Deng, Furen, Wu, Fengquan, Cong, Yanping, Chen, Xuelei
The cosmic 21 cm signal serves as a crucial probe for studying the evolutionary history of the Universe. However, detecting the 21 cm signal poses significant challenges due to its extremely faint nature. To mitigate the interference from the Earth's
Externí odkaz:
http://arxiv.org/abs/2406.17000
Autor:
Chen, Xuelei, Gao, Feng, Wu, Fengquan, Zhang, Yechi, Wang, Tong, Liu, Weilin, Zou, Dali, Deng, Furen, Gong, Yang, He, Kai, Li, Jixia, Sun, Shijie, Suo, Nanben, Wang, Yougang, Wu, Pengju, Xu, Jiaqin, Xu, Yidong, Yue, Bin, Zhang, Cong, Zhou, Jia, Zhou, Minquan, Zhu, Chenguang, Zhu, Jiacong
Publikováno v:
Phil. Trans. R. Soc. A.382,20230094(2024)
At the Royal Society meeting in 2023, we have mainly presented our lunar orbit array concept called DSL, and also briefly introduced a concept of a lunar surface array, LARAF. As the DSL concept had been presented before, in this article we introduce
Externí odkaz:
http://arxiv.org/abs/2403.16409
We investigate the feasibility of using the velocity acoustic oscillations (VAO) features on the Cosmic Dawn 21 cm power spectrum to probe small-scale density fluctuations. In the standard cold dark matter (CDM) model, Pop III stars form in minihalos
Externí odkaz:
http://arxiv.org/abs/2401.14234