Results 51 to 60 of about 637,350 (346)
Oil & Gas Science and Technology, 2019 Water hammer pressure has been known to cause formation fracture and well-control problems. Accurate prediction of water hammer pressure is crucially important to determine the selection of shut-in methods. In this study, the mathematic model of wellbore
Fu Jianhong +4 more
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Establishment and Solution of Four Variable Water Hammer Mathematical Model for Conveying Pipe
Energies, 2022 Transient flow in pipe is a much debated topic in the field of hydrodynamics. The water hammer effect caused by instantaneous valve closing is an important branch of transient flow.
Jiehao Duan, Changjun Li, Jin Jin
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One-handed hammer-spanner for chucks [PDF]
, 1969 Modified spanner wrench with a heavy hammer-piece hinged to its handle allows one hand removal of a tool from a ...
Martino, J. A., Seid, S.
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Advanced Functional Materials, EarlyView.The layer‐by‐layer (LbL) assembly of coordination solids, enabled by the surface‐mounted metal‐organic framework (SURMOF) platform, is on the cusp of generating the organic counterpart of the epitaxy of inorganics. The programmable and sequential SURMOF protocol, optimized by machine learning (ML), is suited for accessing high‐quality thin films of ...
Zhengtao Xu +2 more
wiley +1 more source
Dynamic Analysis and Optimization of Mechanical Impactor
Shiyou jixie, 2020 To address the problems of small impact energy, short continuous working time and poor stability in deep wells of the existing impactors, a new type of mechanical impactor is designed.
Liu Yu, Feng Jin, Huang Xinyu, Chen Wei
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Engineering Structures and Technologies, 2015 A comparative spatial analysis of surface hardness of structural concrete is introduced. Main objective of the paper is to make a repeatability comparison of three types of the still most popular non-destructive testing devices for concrete: L-type ...
Adorján Borosnyói
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Shock and Vibration, 2021 The harmful effects (water hammer wave, flying stone, and broken quality of concrete) produced in the process of underwater drilling and blasting are the key factors affecting the safety of underwater drilling and blasting.
Chao Qi +5 more
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4D‐Printed Magneto‐Plasmonic Microrobots for Programmable Spatiotemporal De‐Icing
Advanced Functional Materials, EarlyView.A 4D‐printing strategy is introduced to achieve programmable de‐icing devices. By aligning gold–magnetite nanofillers within a photosensitive resin, the printed structures exhibit dual magnetic and plasmonic functionalities, enabling precise spatio‐temporal ice removal through thermoplasmonic effects.
Amélie Pérot +7 more
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The Influence of Hammer Type Used in Grinding Mills on Grist Fineness
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Food Science and Technology, 2013 Hammer mills are machines used in agriculture graded to obtain concentrated fodder mix and food industry for grinding vegetable raw materials necessary for obtaining various types of flours.
Mircea Valentin Muntean
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Process for making diamonds [PDF]
, 1973 A description is given of a device and process for making industrial diamonds. The device is composed of an exponential horn tapering from a large end to a small end, with a copper plate against the large end.
Estes, M. F., Rasquin, J. R.
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