Results 1 to 10 of about 14,840,273 (340)

Investigating the effect of using coastal barriers as a shear stress factor in weakening waves by using of the 3D numerical model [PDF]

open access: yesفناوری‌های پیشرفته در بهره‌وری آب, 2023
A major part of the globe is made up of seas, rivers, underground waters and oceans, and from those places where a major part of the resources needed by humans comes from these methods and requires engineering constructions, coastal protection is ...
Saba Bahrami Samani   +2 more
doaj   +1 more source

Comparison of Linear and Triangular Arrangements of Submerged Sacrificial Piles on Local Scour Depth around Cylindrical Bridge Piers [PDF]

open access: yesعلوم و مهندسی آبیاری, 2019
The control of local scour around the piers and bridge abutments has been recognized as an issue of considerable importance due to the structural damage of bridges.
Seyed Mohammad Ali Zomorodian   +2 more
doaj   +1 more source

Examination of the Effect of Cubic Artificial Roughness Density inInclined Channel on Downstream Scour Depth [PDF]

open access: yesعلوم و مهندسی آبیاری, 2018
Water passage from  steep slopes in river engineering issues and the design of water transfer structures is inevitable. Because of the steep slope of the surface, the surface velocity and surface erosion rates are high. Energy control in high-speed flows
Fateme Farajzadeh, Ahmad Fathi
doaj   +1 more source

Dynamic analysis of shear building structure using wavelet transform [PDF]

open access: yesNumerical Methods in Civil Engineering, 2018
Dynamic analysis of shear building structures (SBS) is achieved using fast wavelet transform (FWT). The loads are considered as acceleration of earthquake record. for the analysis, A time history dynamic analysis is carried out.
A. Heidari   +2 more
doaj   +1 more source

The Influence and Application of Slag, Fly Ash, and Limestone Flour on Compressive Strength of Concrete Based on the Concrete Compressive Strength Development over Time (CCSDOT) Model

open access: yesApplied Sciences, 2020
Concrete and cement have been widely used in past decades as a result of urbanization. More and more supplementary cementitious materials are adopted in concrete because its production complements environmental conservation.
Jian Zheng, Guohua Liu
doaj   +1 more source

Effect of Cobble Content on the Shear Behaviour of Sand-Cobble Mixtures

open access: yesAdvances in Civil Engineering, 2021
The sand and cobble stratum is a kind of mechanically unstable stratum. Shield machine often encounter problems such as difficulty in excavation, cutterhead wear, and poor slag discharge of the spiral dumper while constructing in this kind of stratum ...
Chuang Wang   +4 more
doaj   +1 more source

Research on a Ship Mooring Motion Suppression Method Based on an Intelligent Active Anti-Roll Platform

open access: yesApplied Sciences, 2023
Conventional ship mooring in ports has many shortcomings such as a high safety risk, low efficiency and high labor intensity. In order to explore and develop the theory and key technologies of intelligent automatic mooring systems, this paper takes an ...
Feng Gao   +3 more
doaj   +1 more source

Comparison performance of artificial neural network based method in estimation of electric conductivity in wet and dry periods: Case study of Gamasiab river, Iran [PDF]

open access: yesJournal of Applied Research in Water and Wastewater, 2019
The frequent occurrences of wet and dry in the catchment area of the Gamasiab river located in the west of Iran, in addition to affecting the quantitative status of surface water, has caused changes in the water quality of the basin.
Nasrin Abozari   +5 more
doaj   +1 more source

Method for Determining the Fracture Parameters of Fully Graded Dam Concrete

open access: yesBuildings, 2022
This paper describes a method for determining the initiation and unstable toughness of fully graded concrete of arbitrary specimen size. The method first predicts the initiation and peak loads of concrete specimens of any size, as well as crack length-to-
Xiaofeng Gao   +7 more
doaj   +1 more source

Averaging theory for the structure of hydraulic jumps and separation in laminar free-surface flows [PDF]

open access: yes, 1997
We present a simple viscous theory of free-surface flows in boundary layers, which can accommodate regions of separated flow. In particular this yields the structure of stationary hydraulic jumps, both in their circular and linear versions, as well as ...
Bohr, Tomas   +2 more
core   +2 more sources

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