Results 31 to 40 of about 3,190,708 (312)

Predicting underwater unmanned vehicle dynamic recovery process in nonlinear watershed based on BP neural network

Xibei Gongye Daxue Xuebao
Because of a nonlinear watershed′s interference during the recovery of an unmanned underwater vehicle (UUV), a closed-loop control method for optimizing the recovery path of the UUV based on the BP neural network is proposed.
DU Xiaoxu, LI Hanyu, LIU Xin
doaj   +1 more source

Hydrodynamic Dispersion in Porous Media and the Significance of Lagrangian Time and Space Scales

Fluids, 2020
Transport in porous media is critical for many applications in the environment and in the chemical process industry. A key parameter for modeling this transport is the hydrodynamic dispersion coefficient for particles and scalars in a porous medium ...
Vi Nguyen, Dimitrios V. Papavassiliou
doaj   +1 more source

Experimental Investigation on Vortex-Induced Vibration for a Two-Degree-of-Freedom Rigid Cylinder Under Subcritical Reynolds Numbers

Journal of Marine Science and Engineering
In this study, systematic experiments are conducted on a vertical rigid cylinder with two degrees of freedom in the subcritical Reynolds-number regime. The selected flow conditions cover the excitation stage, the lock-in stage, and the post-lock-in stage
Li Zou, Jingyuan Wang, Guoqing Jin, Zongbing Yu, Tao Zhao, Zhimin Zhao   +5 more
doaj   +1 more source

Regular Wave Effects on the Hydrodynamic Performance of Fine-Mesh Nettings in Sampling Nets

Applied Sciences
Fine-mesh netting, with mesh dimensions of the order of a few millimeters, is widely used in sampling nets for the collection of larval and juvenile fishes.
Zhiqiang Liu, Fuxiang Hu, Rong Wan, Shaojian Guo, Yucheng Wang, Cheng Zhou   +5 more
doaj   +1 more source

Breakthrough time of amended cement-soil cutoff wall permeated by heavy metal solutions

Yantu gongcheng xuebao, 2023
In order to investigate the performance of the amended cement-soil cutoff wall (PC: GGBS: bentonite=8%: 8%: 4%) permeated by lead (Pb) and zinc (Zn) and its influencing factors, the transport parameters of Pb and Zn through the amended cement-soil cutoff
LIU Yizhao 1, 2, LU Yang 1, 3, LIU Songyu 1, 2
doaj   +1 more source

Hydrodynamic Coefficients of Simplified Subsea Structures [PDF]

Volume 1: Offshore Technology, 2018
Simplified two-dimensional models, representing components of complex subsea structures, are experimentally investigated. Individual as well as combinations of components in different configurations are tested, in order to study the effect of hydrodynamic interaction.
Mentzoni, Fredrik, Abrahamsen-Prsic, Mia, Kristiansen, Trygve   +2 more
openaire   +2 more sources

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

Advanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi, Hadi Moutablaleh, Ignatius A. Setiawan, Mehrshad Mehrpouya   +3 more
wiley   +1 more source

DigiChrom: A Domain Ontology for Semantic Representation of Trivalent Chromium Platings and Its Large Language Model‐Based Alignment With Multiple Mid‐Level Ontologies

Advanced Engineering Materials, EarlyView.
Digitalizing electroplating requires both domain knowledge and interoperability. This work introduces PlatOn, a domain ontology for trivalent chromium plating and coating characterization, and a hybrid pipeline that aligns it to a mid‐level reference ontology by combining eight similarity metrics with language model reasoning. Expert‐validated mappings
Janik Harter, Elena Garcia Trelles, Christoph Schweizer, Thomas Seifert, Christoph Baumer, Mahmoud Elkady, Katja Feige, Daniel Grimme, Edgar Hoffmann, Andreas Waibel, Anke Walter   +10 more
wiley   +1 more source

Experimental study on hydrodynamic characteristics of a taut moored floating box

Frontiers in Mechanical Engineering
To investigate the hydrodynamic capabilities of the floating breakwater with a taut mooring system, a two-dimensional physical modelling experiment was performed to investigate the hydrodynamic characteristics of the hydrodynamic pressure on the front ...
Qiaoling Ji, Xiuru Jia, Yan Xu, Yu Cheng, Guowei Zhang, Zhenyu Li   +5 more
doaj   +1 more source