Results 31 to 40 of about 898 (223)

Challenges and enablers in fluidization technology

AIChE Journal, EarlyView.
Abstract Gas–solid fluidized beds provide excellent heat and mass transfer for high‐throughput operations from coating to catalytic conversion and underpin emerging low‐carbon technologies. Yet industrial reliability, scale‐up, and control lag scientific understanding, particularly as finer, stickier, and more variable feedstocks increasingly challenge
J. Ruud van Ommen, Jia Wei Chew
wiley   +1 more source

Experimental investigation of the effect of the presence of obstacles at the end of the output keys of the C-type piano key weir on its downstream scour [PDF]

علوم آب و خاک
Piano key weirs are a type of non-linear weir that have a higher discharge coefficient than similar linear weirs. These hydraulic structures have a lightweight foundation and a simple structure is designed and installed on dams and drainage channels. Due
A. Khoshfetrat, Y. Neamah Abdulhasan
doaj  

Linking community structure and climate vulnerability in desert plant assemblages of southern California

American Journal of Botany, EarlyView.
Abstract Premise Desert plant assemblages in southern California provide an opportunity to link patterns of community structure with climate‐driven vulnerability in a rapidly changing environment. California sustains an exceptionally diverse flora of approximately 4300 plant species, with 31% identified as endemic.
Hector Zumbado‐Ulate, Luis E. Barrios, Danelle A. Baronia, G. Darrel Jenerette, Lynn C. Sweet   +4 more
wiley   +1 more source

Enhanced Artificial Neural Network with Harris Hawks Optimization for Predicting Scour Depth Downstream of Ski-Jump Spillway

Applied Sciences, 2020
A spillway is a structure used to regulate the discharge flowing from hydraulic structures such as a dam. It also helps to dissipate the excess energy of water through the still basins. Therefore, it has a significant effect on the safety of the dam. One
Saad Sh. Sammen, Mohammad Ali Ghorbani, Anurag Malik, Yazid Tikhamarine, Mohammad AmirRahmani, Nadhir Al-Ansari, Kwok-Wing Chau   +6 more
doaj   +1 more source

Experimental Investigation of Local Scour Downstream of a Type B Piano Key Weir on Sand and Gravel Bed Materials [PDF]

علوم آب و خاک
Piano key weirs are a new form of labyrinth weirs and exhibit nonlinear characteristics. Due to their high efficiency regarding flow capacity, it is crucial to investigate local scour and identify solutions to mitigate it.
L. Babakhah, A. Khoshfetrat, E. Delavari
doaj  

Multi-Indicator Grading-Based Warning System and Mitigation Strategies of Cross-Sea Bridge Foundations Subject to Scour Risk

Advances in Civil Engineering
The construction of cross-sea bridges is increasingly essential in modern infrastructure, but it poses significant challenges due to complex environmental conditions such as strong tidal forces, waves, and ocean currents.
Guangli Meng, Xiongjie Xiao, Wei Ding, Yungeng Wang, Xiaolong Ma   +4 more
doaj   +1 more source

Local scour depth at piles group exposed to regular waves: On the assessment of expressions based on classification concepts and evolutionary algorithms

Results in Engineering
An accurate estimation of local scour depth around piles group is inevitably essential to provide stability of marine structures. Over the past decades, many investigations have been made to understand the scouring process at piles group exposed to waves
Mohammad Najafzadeh, Razieh Sheikhpour
doaj   +1 more source

Introducing high-order response surface method for improving scour depth prediction downstream of weirs

Applied Water Science
Scour depth downstream of weirs is considered one of the most important hydraulic problems, which greatly influences the stability of weirs. Recently, artificial intelligence (AI) methods have become increasingly popular in modeling hydraulic variables ...
Mohammed Majeed Hameed, Faidhalrahman Khaleel, Mohamed Khalid AlOmar, Siti Fatin Mohd Razali, Mohammed Abdulhakim AlSaadi, Nadhir Al-Ansari   +5 more
doaj   +1 more source

Prediction of Scour Hole Geometry Downstream of Ski-Jump Spillways Using Novel Intelligent Computational Machine Learning Models

Forecasting
The ski-jump spillway is an energy-dissipating structure that discharges extra water beyond the dam’s capacity. The scour process occurs below spillways due to the collision of the water jet with high energy.
Mehrshad Samadi, Aydin Shishegaran, Mina Torabi, Zohreh Sheikh Khozani   +3 more
doaj   +1 more source

Downslope erosion response of engineered landform to upslope runoff in loess hilly region

Shui kexue jinzhan, 2015
In order to figure out the quantitative influence on wash-scour erosion at the bottom of high and steep slope of engineered landform caused by upslope runoff,the typical abrupt slope (36°) of engineering deposits along the expressway from Shenmu to Fugu ...
ZHANG Letao, GAO Zhaoliang, LI Yonghong, TIAN Hongwei   +3 more
doaj   +1 more source