Results 41 to 50 of about 3,005,056 (311)

Crack detection for concrete bridges with imaged based deep learning

open access: yesScience Progress, 2022
Within the framework of intelligent bridge detection, a number of crack detection methods based on image processing techniques have been implemented. In this study, a combined novel approach with deep learning of a single shot multibox detector (SSD) and
Chunfeng Wan   +6 more
doaj   +1 more source

Concrete Fibrations [PDF]

open access: yesNotre Dame Journal of Formal Logic, 2017
As far as we know no notion of concreteness for fibrations exists. We introduce such a notion and discuss some basic results about it.
openaire   +4 more sources

Concept and development of a steel–bamboo SI (skeleton–infill) system: experimental and theoretical analysis

open access: yesJournal of Wood Science, 2019
A steel–bamboo SI (skeleton–infill) system with steel frame as the skeleton and bamboo box as the filler is proposed, which realizes the requirements of building assembly and sustainable development.
Qingfang Lv, Yi Ding, Ye Liu
doaj   +1 more source

‘Concrete’ Manipulatives, Concrete Ideas [PDF]

open access: yesContemporary Issues in Early Childhood, 2000
The notion of ‘concrete,’ from concrete manipulatives to pedagogical sequences such as ‘concrete to abstract,’ is embedded in educational theories, research, and practice, especially in mathematics education. In this article, the author considers research on the use of manipulatives and offers a critique of common perspectives on the notions of ...
openaire   +1 more source

Frequency-Based Cable Tension Identification Using a Nonlinear Model with Complex Boundary Constraints

open access: yesShock and Vibration, 2023
Accurate estimation of the cable force affects the bridges’ long-term integrity and serviceability directly. The frequency method is often used for cable tension testing in bridge engineering.
Wen-ming Zhang, Zhi-wei Wang
doaj   +1 more source

Bond–slip Behavior of Fiber-reinforced Polymer/concrete Interface in Single Shear Pull-out and Beam Tests [PDF]

open access: yes, 2015
It has been assumed that the fiber-reinforced polymer/concrete interface is subjected to in-plane shear condition when intermediate crack debonding failure occurs.
Harries, Kent A.   +2 more
core   +2 more sources

Umbilical Concretion

open access: yesJournal of Radiology Case Reports, 2011
Umbilical concretion is a rarely encountered benign entity. Concretions typically form within an umbilical cleft which is unusually deep and consist of keratinaceous and sebaceous material. Lack of attention to umbilical hygiene usually plays a role in their formation.
David, Sheehan   +2 more
openaire   +2 more sources

Structural behavior analysis of a continuous steel truss arch railway bridge integrating monitoring data

open access: yesAdvances in Mechanical Engineering, 2016
Using theoretical modeling combined with monitoring data, the typical dynamic and static behaviors of a continuous steel truss arch railway bridge are evaluated.
Yong-sheng Song   +5 more
doaj   +1 more source

The connection performance and bearing capacity of a single-layer combined lattice shell with aluminium alloy honeycomb panels

open access: yesCase Studies in Construction Materials, 2022
To take full advantage of the lightweight and high strength characteristics of aluminium alloy honeycomb panels and to overcome the shortcoming of the low elastic modulus of the aluminium alloy lattice shell, the present study proposes a new aluminium ...
Caiqi Zhao   +5 more
doaj   +1 more source

Experimental Study of Negative Skin Friction of Pile Group Foundations for Offshore Wind Turbines on Artificial Islands

open access: yesJournal of Marine Science and Engineering
Constructing offshore wind turbines on artificial islands is considered a viable option, but negative skin friction (NSF) is a significant adverse factor that cannot be ignored.
Yeyu Yan   +5 more
doaj   +1 more source

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