Results 131 to 140 of about 8,055 (288)

Investigation of temperature- and pressure effects on drilling fluid properties and related downhole torque and drag calculations [PDF]

, 2016
Master's thesis in Petroleum engineeringIncreasing temperature and pressure with depth, affects the properties of drilling fluid. The effect of temperature and pressure on the density and viscosity of drilling fluid is of great importance.
Tveiterå, Martin
core  

Immersed Boundary Projection Method for Boundaries With Slip Velocities

International Journal for Numerical Methods in Fluids, EarlyView.
A formulation of the immersed boundary method for incompressible flow over arbitrarily‐shaped bodies with surface slip described by the Navier boundary condition is presented. The wall slip velocity and the boundary force are determined implicitly through a projection to satisfy both the boundary condition and the divergence‐free condition of the ...
Takehiro Fujii, Takeshi Omori
wiley   +1 more source

Flexible photocatalytic materials: From substrate engineering to multi‐field synergistic enhancement

FlexMat, EarlyView.
This review examines flexible photocatalytic systems, covering substrate evolution from polymers to biomass, fabrication methods like electrospinning, and key mechanical and optoelectrochemical metrics under deformation. Enhancement strategies are critically discussed, followed by applications in energy conversion, environmental remediation, and ...
Weiqi Wang, Xinrong Zhang, Jing Zhao, Songcan Wang   +3 more
wiley   +1 more source

Methodological guidelines for the characterization of polysaccharide helical structures

Food Biomacromolecules, EarlyView.
Abstract Polysaccharide chain conformation is a critical determinant of their physicochemical and biological properties; however, reliable identification remains a significant challenge due to the inconsistent structural evidence yielded by conventional analytical techniques.
Yixuan Wu, Shudan Luo, Meifang Zhong, Yinle Cai, Yinshu Li, Xu Lu   +5 more
wiley   +1 more source

The Application of Telemedicine in Surgery

Med Research, EarlyView.
This figure provides an overview of the content presented in this article. Telemedicine is integrated throughout the entire surgical workflow, with distinct applications across the preoperative, intraoperative, and postoperative phases. These applications are enabled by a suite of supporting technologies, while the associated implementation challenges ...
Yufan Yang, Chang Liu, Xue Sun, Yiting Wang, Minghui Zhao, Shuya Jiang, Haoling Zhang, Wangzheqi Zhang, Wenwen Shi   +8 more
wiley   +1 more source

A Physics‐Informed Koopman Operator Framework for Decentralized Discrete‐Time Sequential Control of a Modular Aerial Parcel Delivery Robot

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT This paper presents a Physics‐Informed Koopman Operator (PIKO) framework integrated with a discrete‐time Sequential Action Control (SAC) for real‐time, decentralized control of a modular aerial parcel delivery robot composed of multiple independently actuated propeller modules.
Archit Krishna Kamath, Peng Shi, Ramesh K. Agarwal   +2 more
wiley   +1 more source

Dynamic Performance Enhancement of a High‐Agility Hypersonic Mechanical System via a Learning‐Augmented Robust Control Architecture

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT The design of control systems for high‐agility mechanical systems operating in extreme environments is a significant challenge in nonlinear dynamics. This paper addresses the complex dynamic control problem of a hypersonic interceptor, modeled as a multi‐input multi‐output (MIMO) mechanical system characterized by strong aerodynamic cross ...
Mohammad Mahdi Soori, Seyed Hossein Sadati   +1 more
wiley   +1 more source

An Integrated Numerical and Bollard Pull Evaluation Approach for Early‐Stage Resistance and Thrust Assessment of a Small Craft

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Early‐stage hydrodynamic assessment of slender multihull vessels is challenged by limited geometric maturity, uncertain propulsion integration, and strong sensitivity to operating conditions. Under such constraints, reliance on a single analytical or numerical method may lead to misleading design decisions due to oversimplification or ...
Chairat Napasaksri, Napat Intaraksa, Chalermkiat Nuchturee, Ramil Kesvarakul, Sarawuth Srinakaew   +4 more
wiley   +1 more source

Robust trajectory tracking control of an underwater robotic manipulator using an IPSO-PID framework under hydrodynamic and ocean-current disturbances. [PDF]

Front Robot AI
Yao J, Yang J, Li C.
europepmc   +1 more source

Architectural Tailoring and Reinforcement Strategies for Improved Bearing Strength in Thick Carbon Fiber/Epoxy Laminates

Polymer Composites, EarlyView.
Schematic overview of the investigated laminate architectures and reinforcement strategies used to evaluate their effects on the bearing performance and failure behaviour of thick carbon fibre/epoxy laminates. ABSTRACT This study provides a unified experimental comparison of 11 joint configurations in thick (7–12 mm) vacuum‐infused CFRP laminates ...
Hasan Caglar, James German, Zain Ali, David Ayre, Marzio Grasso, Andrew Mills, Yigeng Xu, Martin Skote   +7 more
wiley   +1 more source