Results 21 to 30 of about 63,545 (269)

A Full-Body Relative Orbital Motion of Spacecraft Using Dual Tensor Algebra and Dual Quaternions

Mathematics, 2023
This paper proposes a new non-linear differential equation for the six degrees of freedom (6-DOF) relative rigid bodies motion. A representation theorem is provided for the 6-DOF differential equation of motion in the arbitrary non-inertial reference ...
Daniel Condurache
doaj   +1 more source

Intelligent Site Selection of Distributed Photovoltaic Power Stations Based on a Multi-site Forecasting Model [PDF]

Zhengzhou Daxue xuebao. Gongxue ban
In order to improve the operational efficiency of photovoltaic (PV) power stations a proposal of multi-site forecasting model (MSFM) was proposed to addressing the multi-site location selection problem. In the proposed model, spatiotemporal correlation,
SONG Ling, CHANG Longtao, LYU Shunming, YANG Zhaohui, LIU Xinfeng, CHEN Guanzhong   +5 more
doaj   +1 more source

Deformed general relativity and scalar–tensor models [PDF]

Classical and Quantum Gravity, 2018
Abstract We calculate the most general action for a scalar–tensor model up to quadratic order in derivatives with deformed general covariance and non-minimal coupling. We demonstrate how different choices of the free functions recover specific well known scalar–tensor models.
Rhiannon Cuttell, Mairi Sakellariadou
openaire   +3 more sources

Limits of the energy - momentum tensor in general relativity [PDF]

Classical and Quantum Gravity, 1998
A limiting diagram for the Segre classification of the energy-momentum tensor is obtained and discussed in connection with a Penrose specialization diagram for the Segre types. A generalization of the coordinate-free approach to limits of Paiva et al. to include non-vacuum space-times is made.
Paiva, F. M., Rebouças, M. J., Hall, G. S., MacCallum, M. A. H.   +3 more
openaire   +2 more sources

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

FEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure, Misaki K. Nishio, Satoru Okuda, Kohji Hotta   +3 more
wiley   +1 more source

Using geometric algebra to represent curvature in shell theory with applications to Starling resistors [PDF]

Royal Society Open Science, 2017
We present a novel application of rotors in geometric algebra to represent the change of curvature tensor that is used in shell theory as part of the constitutive law. We introduce a new decomposition of the change of curvature tensor, which has explicit
A. L. Gregory, A. Agarwal, J. Lasenby
doaj   +1 more source

Estimation of brain tissue response by electrical stimulation in a subject-specific model implemented by conductivity tensor imaging

Frontiers in Neuroscience, 2023
Electrical stimulation such as transcranial direct current stimulation (tDCS) is widely used to treat neuropsychiatric diseases and neurological disorders.
Nitish Katoch, Youngsung Kim, Bup Kyung Choi, Sang Woo Ha, Tae Hoon Kim, Eun Ju Yoon, Sang Gook Song, Jin Woong Kim, Hyung Joong Kim   +8 more
doaj   +1 more source

Modelling stem cell differentiation related processes—A practical overview for biologists

FEBS Letters, EarlyView.
Stem cell differentiation is complex and difficult to control experimentally. This review introduces suitable computational modelling approaches that can support stem cell research, from mechanistic ODE and abstract models to multiscale and deep learning methods.
Ricco Zeegelaar, Xinqi Yan, Lucas Jansen Klomp, Stefano Schivo, Janine N. Post   +4 more
wiley   +1 more source

A Modified Higher-Order Singular Value Decomposition Framework With Adaptive Multilinear Tensor Rank Approximation for Three-Dimensional Magnetic Resonance Rician Noise Removal

Frontiers in Oncology, 2020
The magnetic resonance (MR) images are acknowledged to be inevitably corrupted by Rician distributed noise, which adversely affected the image quality for diagnosis purpose.
Li Wang, Di Xiao, Wen S. Hou, Wen S. Hou, Wen S. Hou, Xiao Y. Wu, Xiao Y. Wu, Xiao Y. Wu, Lin Chen, Lin Chen   +9 more
doaj   +1 more source

Weak-strong uniqueness and energy-variational solutions for a class of viscoelastoplastic fluid models

Advances in Nonlinear Analysis, 2022
We study a model for a fluid showing viscoelastic and viscoplastic behavior, which describes the flow in terms of the fluid velocity and a symmetric deviatoric stress tensor.
Eiter Thomas, Hopf Katharina, Lasarzik Robert   +2 more
doaj   +1 more source