Results 1 to 10 of about 752,690 (231)

Relative Topological Entropy for Actions of Non-discrete Groups on Compact Spaces in the Context of Cut and Project Schemes [PDF]

open access: yesJournal of Dynamics and Differential Equations, 2020
AbstractIn the study of aperiodic order via dynamical methods, topological entropy is an important concept. In this paper, parts of the theory, like Bowen’s formula for fibre wise entropy or the independence of the definition from the choice of a Van Hove sequence, are extended to actions of several non-discrete groups.
Till Hauser
exaly   +3 more sources

Design optimization and performance evaluation of semi-prefabricated UHPC-RC metro station structures [PDF]

open access: yesScientific Reports
Aiming to address the limitations associated with conventional cut-and-cover metro stations that utilize cast-in-situ reinforced concrete structures, this study proposes an optimized design method for a semi-prefabricated UHPC-RC metro station structure,
Gang Lei   +4 more
doaj   +2 more sources

A model test on an open-cut tunnel structure under the effect of a stick-slip normal fault [PDF]

open access: yesRailway Sciences, 2022
Purpose – Large displacement misalignment under the action of active faults can cause complex three-dimensional deformation in subway tunnels, resulting in severe damage, distortion and misalignment.
Zhiqiang Zhang, Xingyu Zhu, Ronghua Wei
doaj   +1 more source

Optimization of direct-hole cutting blasting technology for deep-buried layered surrounding rock diversion tunnels

open access: yes地质科技通报, 2023
Objective In recent years, the trend of tunnel blasting construction extending to depth is becoming more and more significant, and the influence of layered rock mass in deep buried diversion tunnel on cutting quality in blasting construction is the key ...
Shouguo Jiang   +4 more
doaj   +1 more source

Cut-and-Project Schemes for Pisot Family Substitution Tilings [PDF]

open access: yesSymmetry, 2018
We consider Pisot family substitution tilings in $\R^d$ whose dynamical spectrum is pure point. There are two cut-and-project schemes(CPS) which arise naturally: one from the Pisot family property and the other from the pure point spectrum respectively. The first CPS has an internal space $\R^m$ for some integer $m \in \N$ defined from the Pisot family
Jeong-Yup Lee   +2 more
openaire   +1 more source

The Black Fungus Gnats (Diptera, Sciaridae) of Norway – Part I: species records published until December 2019, with an updated checklist [PDF]

open access: yesZooKeys, 2020
Black Fungus Gnats (Sciaridae) are a megadiverse, cosmopoliltan family of bibionomorph Diptera. Even in Europe, the continent with the longest tradition in sciarid taxonomy, numerous taxonomic issues remain unresolved and countless species await ...
Frank Menzel   +3 more
doaj   +3 more sources

Study of Bag Grouting Pile Reinforcing Deep Soft-Soil Foundation with an Interlayer of Hard Materials on High-Speed Railway Ballast Track

open access: yesApplied Sciences, 2022
High-speed railways are built in deep soft-soil foundations interlayered with hard materials. However, the hard layers cannot be penetrated by conventional foundation treatment.
Shen Zuo   +5 more
doaj   +1 more source

Optimized Partition Scheme for Prefabricated Underpass with Large Cross Section

open access: yesAdvances in Civil Engineering, 2021
With the acceleration of urbanization in China, more underpasses will be constructed in big cities to alleviate the great traffic pressure. The prefabricated and assembly construction method has been introduced to replace the traditional cast-in-place ...
Zhiyi Jin, Taiyue Qi, Xiao Liang, Bo Lei
doaj   +1 more source

Overburden treatment for concrete face rockfill dams and its application in Hekoucun project

open access: yesYantu gongcheng xuebao, 2020
The concrete face, toe-slab, connecting slab, cut-off wall are usually used as the anti-seepage system of concrete face rockfill dams (CFRDs) on deep overburden.
XING Jian-ying 1, 2, GUAN Zhi-cheng 2, LÜ Xiao-long 1
doaj   +1 more source

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