Results 61 to 70 of about 938,411 (197)

A Phase‐Field Model for Quasi‐Dynamic Rupture Nucleation and Propagation of In‐Plane Faults

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Computational modeling of faulting processes is an essential tool for understanding earthquake mechanics but remains challenging due to the structural and material complexities of fault zones. The phase‐field method has recently enabled unified modeling of fault propagation and off‐fault damage within a fracture‐mechanics‐based framework ...
Fan Fei, Md Shumon Mia, Ahmed E. Elbanna, Jinhyun Choo   +3 more
wiley   +1 more source

q-identities from Lagrange and Newton interpolation [PDF]

, 2003
Combining Newton and Lagrange interpolation, we give q-identities which generalize results of Van Hamme, Uchimura, Dilcher, and ...
Lascoux, Alain, Amy M. Fu, Alain Lascoux, Fu, Amy M.   +3 more
core   +1 more source

Solids Conveying in Injection Molding Machines—Analytical Model for Smooth and Grooved Feed Sections Derived From DEM Simulations

Polymer Engineering &Science, EarlyView.
Understanding Solids Conveying in Injection Molding Machines – Dimensions. ABSTRACT Solids conveying is a key aspect for the design of polymer processing machines, especially for processes with high screw speeds, grooved feed sections, and material with low bulk density.
Jan Landgraeber, Volker Schoeppner, Dennis Kleinschmidt, Dominik Jonek, Nils Grieger   +4 more
wiley   +1 more source

i-Swift: Newton Forward Divided Difference Interpolation-Distance and Time Arrival Calculator for Teaching and Learning Processes

Malaysia Journal of Invention and Innovation
i-Swift was designed to assist the public navigate and manage logistics industries. People often struggle with estimating travel distances based on the time taken, especially during exercise routines, outdoor activities, or daily commutes. The lack of a
Nur Nadhirah Mohd Rohaidi, Elaziera Panji, Nurzalina Harun, Zubaidah Sadikin, Sidik Rathi, Nur Zafirah Mohd Sidek, Siti Rahimah Batcha, Mohd Agos Salim Nasir   +7 more
doaj   +2 more sources

On the chaotic systems of attraction with fractional operators in a novel Lorenz system

Results in Control and Optimization
In this research, a novel variant model of the classical Lorenz system is proposed by reformulating both the classical and fractional-order Lorenz systems through a new framework based on piecewise fractional derivatives.
Atul Kumar, Hambeer Singh, Salah Boulaaras, Kamal Shah, Thabet Abdeljawad   +4 more
doaj   +1 more source

The role of identification in data‐driven policy iteration: A system theoretic study

International Journal of Robust and Nonlinear Control, EarlyView.
Abstract The goal of this article is to study fundamental mechanisms behind so‐called indirect and direct data‐driven control for unknown systems. Specifically, we consider policy iteration applied to the linear quadratic regulator problem. Two iterative procedures, where data collected from the system are repeatedly used to compute new estimates of ...
Bowen Song, Andrea Iannelli
wiley   +1 more source

Hexapod Locomotion Across Structured and Unstructured Terrains: A Data‐Driven Review of Modeling, Control, and Validation

Journal of Field Robotics, EarlyView.
ABSTRACT The design of a hexapod is complex and requires integration between kinematic models, control systems, and sensing. Existing literature has reviewed these sub‐systems in isolation. Since 2021, there has been no review of the field despite significant advancements in soft soil, lunar traversal, and artificial intelligence.
Akhil Rampersad, Bashan Naidoo
wiley   +1 more source

Study on the high precision frequency measurement algorithm in the mine intelligent power supply system

矿业科学学报, 2016
To solve the problem of the error of frequency measurement algorithm with time-varying frequency in mine power supply system, an improved software zero-crossing algorithm is proposed.The relationship among the phase angle, the time and the frequency of ...
Yuan Shiliang, Xu Zhiqiang, Dong Jie, Zhu Qichen   +3 more
doaj  

Space Gravity Spectroscopy - determination of the Earth’s gravitational field by means of Newton interpolated LEO ephemeris Case studies on dynamic (CHAMP Rapid Science Orbit) and kinematic orbits [PDF]

Advances in Geosciences, 2003
An algorithm for the (kinematic) orbit analysis of a Low Earth Orbiting (LEO) GPS tracked satellite to determine the spherical harmonic coefficients of the terrestrial gravitational field is presented.
T. Reubelt, G. Austen, E. W. Grafarend
doaj  

Key Technical Fields and Future Outlooks of Space Manipulators: A Survey

SmartBot, EarlyView.
This paper systematically reviews the technological development of space manipulators, emphasizing the unique challenges posed by space environments. It examines four areas: structural design, modeling, planning, and control, while introducing typical ground test platforms.
Gang Chen, Zeyuan Huang, Ying Yan, Xiaokang An, Zhikai Zhao, Jirong Lin, Xiangrong Zhao, Xianyuan Gao, Junyi Zong, Xuewen Jia, Zhipeng Yao, Jianliang Liao, Ning Ji   +12 more
wiley   +1 more source