Results 51 to 60 of about 2,915 (310)
Engineering, 2017 The possible mitigation of floods by dams and the risk to dams from floods are key problems. The People’s Republic of China is now leading world dam construction with great success and efficiency.
F. Lempérière
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Robust optimization of SVM hyper-parameters for spillway type selection
Ain Shams Engineering Journal, 2021 Spillways, which play a vital role in dams, can be built in various types. Although several studies have been conducted on hydraulic calculations of spillways, studies on type selection that require heuristics knowledge were limited.
Enes Gul, Nuh Alpaslan, M. Emin Emiroglu
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Advanced Science, EarlyView.Laser‐induced graphene (LIG) provides a scalable, laser‐direct‐written route to porous graphene architecture with tunable chemistry and defect density. Through heterojunction engineering, catalytic functionalization, and intrinsic self‐heating, LIG achieves highly sensitive and selective detection of NOX, NH3, H2, and humidity, supporting next ...
Md Abu Sayeed Biswas +6 more
wiley +1 more source
History of Stepped Channels and Spillways: a Rediscovery of the 'Wheel' [PDF]
, 1995 Recently, spillways with a stepped profile have regained interest and favor among design engineers to pass flood waters over the dams. The stepped geometry enhances the energy dissipation above the spillway and reduces the size of a downstream stilling ...
Chanson, Hubert, Chanson, H
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Defect‐Functionalization‐Mediated Tunneling Drives Nonlinear Photoemission in Perovskites
Advanced Science, EarlyView.This cover illustration depicts CsPbBr3 perovskite nanocrystals embedded with functionalized defect vacancies, where electrons migrate through defect‐mediated pathways and emit as lightning‐like beams. The imagery visualizes the core discovery of our work—defect‐functionalization‐mediated tunneling enabling nonlinear photoemission, where deep‐level ...
Hang Ren +9 more
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Study of Conveniency of Using Stepped Spillway in Roller Compacted Concrete Dams (RCCD) [PDF]
Engineering and Technology Journal, 2009 A suggested design of Bastora stepped spillway has been taken as a prototype to build a physical wooden model with scale of 1:20 (Lm/Lp). Experiments have been carried out on the model with slope of upward inclined steps of 420, 280, 140 and 00.
Karim K. EL- Jumaily +1 more
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Forum Article. Hydraulics of Stepped Spillways: Current Status [PDF]
, 2000 Stepped-channel spillways, stepped spillways, staircase waste waterways, or stepped chutes have been used for more than 3,000 years. In recent years they are experiencing renewed attention.
Chanson, Hubert
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Pressure distributions of stepped spillways with different horizontal face angles
, 2018 Stepped spillways are commonly used in hydropower engineering, landscape irrigation and aeration tanks due to their high energy dissipation and superior aeration.
Zhaoliang Bai +2 more
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A Dual‐Channel Synergistic Ultrasensitive Biosensor for Tumor Liquid Biopsy
Advanced Science, EarlyView.ABSTRACT Liquid biopsy technology, which detects circulating tumor DNA (ctDNA) in cerebrospinal fluid, plays a crucial role in the early diagnosis and precision treatment of gliomas. However, the intrinsically low abundance and rapid clearance of ctDNA pose substantial challenges for conventional analytical techniques, such as droplet digital PCR and ...
Yu Sun +12 more
wiley +1 more source
Chapter 5. Civil engineering design for levee spillways
, 2021 International audienceThis guide represents a complete overview of the design and protection issues for structures built on dikes, such as spillways. This chapter presents the civil engineering of these constructions.
Degoutte, Gérard +2 more
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