Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Alireza Masjedi"'
Publikováno v:
Water Science, Vol 38, Iss 1, Pp 378-390 (2024)
With increased length of the crest in a certain width range, the labyrinth weirs increase the discharge capacity. In this study, a laboratory flume was used with a length of 8 m and a width and height of 0.6 m, in which the hydraulic loss of linear/n
Externí odkaz:
https://doaj.org/article/8ebe86697edc43d6b6ae582241e774f3
Publikováno v:
Water Science, Vol 38, Iss 1, Pp 65-76 (2024)
Spillway is one of the most cost-effective energy dissipating structures used in dams which leads to dissipation of flow energy at the end of the structure. Scouring is a phenomenon occurring next to the hydraulic structures, and which can lead to de
Externí odkaz:
https://doaj.org/article/8813059b00f748b9974d5f8f55d6faa5
Publikováno v:
Results in Engineering, Vol 23, Iss , Pp 102759- (2024)
The primary objective of this study is to examine the suitability of employing a machine learning models (MLMs) comprising Support Vector Machine (SVM), Gene Expression Programming (GEP), and Artificial Neural Network (ANN) algorithms to emulate the
Externí odkaz:
https://doaj.org/article/cde25b15f1b746e5ad97701488c2a130
Publikováno v:
Water Science, Vol 37, Iss 1, Pp 304-314 (2023)
ABSTRACTNonlinear weirs offer a relatively high discharge capacity under low water loads. Their efficiency, however, is decreased at high water loads due to the submergence of the weir outlet key. In the present study, sloping parapet walls with the
Externí odkaz:
https://doaj.org/article/d7801234d8964e58924f4b7202b8f8d9
Autor:
Ghasem Aghashirmohammadi, Mohammad Heidarnejad, Mohammad Hossein Purmohammadi, Alireza Masjedi
Publikováno v:
Water Science, Vol 37, Iss 1, Pp 28-39 (2023)
ABSTRACTNonlinear weirs are among the major structures used in water transfer. Thus, these structures have been the subject of various studies. This study investigates the effect of flow splitters on discharge performance of trapezoidal and triangula
Externí odkaz:
https://doaj.org/article/507419f7306a419cabfc279d3ac52213
Publikováno v:
Results in Engineering, Vol 21, Iss , Pp 101820- (2024)
The present research aims to forecast the safeguarding efficacy of a mesh collar, of hole diameter d, in developing of scour depth around a cylindrical bridge pier of diameter D under the steady and clean water conditions utilizing three machine lear
Externí odkaz:
https://doaj.org/article/70b22bb8c0f54309a7e98ff7ff7eebe0
Publikováno v:
Ain Shams Engineering Journal, Vol 12, Iss 2, Pp 1241-1253 (2021)
Bridges are among the oldest, most important and basic communication structures mainly built on the rivers. Many of them are annually destroyed due to the local scouring phenomenon. The current study used convergent and divergent slot tools on abutme
Externí odkaz:
https://doaj.org/article/c211640a104548f180b1b901889e12c4
Autor:
Fariedeh karamzadeh, Alireza Masjedi, Mohammad Heidarnejad, Amir Abbas Kamanbedast, Amin Bordbar
Publikováno v:
مهندسی منابع آب, Vol 13, Iss 46, Pp 45-56 (2020)
The effect of submerged pipe diameter on scour controlling a direct laboratory flume was experimentally studied. Experiments were carried out on a cylindrical pipe with or without a lower blade. For these experiments, four pipe diameters, four blade
Externí odkaz:
https://doaj.org/article/135a22e8bc0c4f8c877d8977ed848b7a
Autor:
Seyed Mehdi Naghib Zadeh, Mohammad Heidarnejad, Alireza Masjedi, Amirabbas Kamanbedast, Amin Bordbar
Publikováno v:
Tecnología y ciencias del agua, Vol 11, Iss 4, Pp 215-243 (2020)
Heavy seasonal rains over a dam reservoir can lead to huge floods and consequent failure of the dam structure. One way of controlling the adverse effects of heavy rains is to use weirs with larger dimensions such as piano key weirs (PKWs). In spite o
Externí odkaz:
https://doaj.org/article/2c7844ae89d8439e878aebe4a4f64493
Autor:
Payman Heidari Rad, Amirabbas Kamanbedast, Mohammad Heidarnejad, Alireza Masjedi, Hooshang Hasonizadeh
Publikováno v:
Ain Shams Engineering Journal, Vol 11, Iss 2, Pp 445-454 (2020)
Water supply at a desired rate at any time meet water requirements regardless of river discharge must be considered in the general design of intakes provided that the needs do not exceed the river flow. Due to the lack of necessary information in thi
Externí odkaz:
https://doaj.org/article/de3007e2b8dd4624adb3ed2599d0c511