Results 11 to 20 of about 777,500 (302)

Tunneling gravimetry [PDF]

open access: yesEPJ Quantum Technology, 2022
AbstractWe examine the prospects of utilizing matter-wave Fabry–Pérot interferometers for enhanced inertial sensing applications. Our study explores such tunneling-based sensors for the measurement of accelerations in two configurations: (a) a transmission setup, where the initial wave packet is transmitted through the cavity and (b) an out-tunneling ...
Patrik Schach   +4 more
openaire   +3 more sources

Study on the Mechanism and Effect of a Partition Wall Controlling Foundation Pit Deformation in the Soft-Soil Area

open access: yesAdvances in Civil Engineering, 2022
Based on the soft-soil layer and several practical subway stations projects, the effect of partition wall main parameters on internal force and the deformation of retaining structure was thoroughly investigated via numerical simulation and orthogonal ...
Chunlei Feng   +3 more
doaj   +1 more source

Dynamic Characteristics of a Double-Pylon Cable-Stayed Bridge with Steel Truss Girder and Single-Cable Plane

open access: yesAdvances in Civil Engineering, 2021
The dynamic characteristics are closely linked to the seismic stability and wind-resistant of the bridge. But different bridge types have different dynamic characteristics.
Yong Zeng   +5 more
doaj   +1 more source

Study on the Influence of Train Dynamic Load on underneath Tunnel Cast-in-Situ Concrete in Early Age

open access: yesShock and Vibration, 2022
The cast-in-situ concrete lining is prone to structural damage, cracks, and other defects, due to the influence of dynamic load at an early age, which is necessary to study the dynamic response.
Yuchao Zheng   +6 more
doaj   +1 more source

Use of Automatic Target Recognition System for the Displacement Measurements in a Small Diameter Tunnel Ahead of the Face of the Motorway Tunnel During Excavation [PDF]

open access: yes, 2008
During construction of the Sentvid tunnel a unique opportunity arose to measure the 3D displacements ahead of the motorway tunnel excavation face, since the exploratory tunnel was already constructed in the axis of the main tunnel.
Ambrožič, Tomaž   +5 more
core   +2 more sources

Numerical Simulation of Nanosilica Sol Grouting for Deep Tunnels Based on the Multifield Coupling Mechanism

open access: yesGeofluids, 2021
Grouting is an effective technical way for the construction of deep tunnels in unfavorable geological conditions. The fluid-solid-chemical coupling mechanism of grouting process is analyzed from the following three aspects: influence of physical ...
Dongjiang Pan   +7 more
doaj   +1 more source

Sign of tunnel spin polarization of low-work-function Gd/Co nanolayers in a magnetic tunnel junction [PDF]

open access: yes, 2008
Magnetic tunnel junctions having a low-work-function Gd/Co nanolayer at the interface with an Al2O3 tunnel barrier are shown to exhibit both positive and negative values of the tunnel magnetoresistance. The sign of the tunnel spin polarization of the Gd/
Jansen, R., Lodder, J.C., Min, B.C.
core   +2 more sources

INFLUENCE OF MATERIAL CHARACTERIZATION IN THE DESIGN OF TUNNEL LIGHTING INSTALLATIONS [PDF]

open access: yes, 2019
The paper describes the influence of the characterisation of reflectance behaviour of tunnel pavements and wall materials on the tunnel lighting design. CIE 189 document suggests considering lambertian behaviour for inter-reflection calculations for road
Iacomussi, Paola, Rossi, Giuseppe
core   +1 more source

Risk Assessment System Based on Fuzzy Composite Evaluation and a Backpropagation Neural Network for a Shield Tunnel Crossing under a River

open access: yesAdvances in Civil Engineering, 2020
Constructing a shield tunnel that crosses under a river poses considerable safety risks, and risk assessment is essential for guaranteeing the safety of tunnel construction. This paper studies a risk assessment system for a shield tunnel crossing under a
Xiao Liang   +4 more
doaj   +1 more source

A Solution of Subgrade Modulus for Response Displacement Method of Circular Underground Structures

open access: yesShock and Vibration, 2021
In the seismic analysis and design of the underground structure, the response displacement method, as a pseudostatic method, has been widely adopted for its solid theoretical background, clear physical concept, and ease of implementation.
Wei Wang   +6 more
doaj   +1 more source

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