Results 41 to 50 of about 366,497 (275)
Tolerance Synthesis of Delta-like Parallel Robots Using a Nonlinear Optimisation Method
Applied Sciences, 2023 Robotic systems require high accuracy in manipulating objects. Positioning errors are influenced by geometric tolerances and various sources. This paper introduces a new technique based on the interior-point algorithm optimisation method to allocate ...
Allaoua Brahmia +3 more
doaj +1 more source
Geometric models of matter [PDF]
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2012 Inspired by soliton models, we propose a description of static particles in terms of Riemannian 4-manifolds with self-dual Weyl tensor. For electrically charged particles, the 4-manifolds are non-compact and asymptotically fibred by circles over physical 3-space. This is akin to the Kaluza–Klein description of electromagnetism, except that
Atiyah, M. F. +2 more
openaire +2 more sources
Scaling and universality in the micro-structure of urban space [PDF]
, 2003 We present a broad, phenomenological picture of the distribution of the length of open space linear segments, $l$, derived from maps of 36 cities in 14 different countries.
Alan Penn +25 more
core +2 more sources
Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source
Meso-scale modelling of 3D woven composite T-joints with weave variations [PDF]
, 2019 A meso-scale modelling framework is proposed to simulate the 3D woven fibre architectures and the mechanical performance of the composite T-joints, subjected to quasi-static tensile pull-off loading. The proposed method starts with building the realistic
Long, Andrew, Yan, Shibo, Zeng, Xuesen
core +3 more sources
FEBS Letters, EarlyView.The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li +2 more
wiley +1 more source
Spatial guided image captioning: Guiding attention with object's spatial interaction
IET Image ProcessingNowadays relational position embedding is widely used in many large multi‐modal models. It begins with relational captioning (a branch of image captioning) and contains two procedures: geometric modelling and prior attention.
Runyan Du +4 more
doaj +1 more source
Analytical modelling of perforated geometrical domains by the R-functions
Mathematical Modelling and Analysis, 2020 This paper deals with the construction of boundary equations for geometric domains with perforation. Different types of perforated geometric domains are considered. The R-functions method for analytical modelling of perforated geometrical domains is used.
Yuriy Semerich
doaj +1 more source
A quintessentially geometric model [PDF]
Journal of Cosmology and Astroparticle Physics, 2006 11 pages, 3 figures.
Gumjudpai, Burin +2 more
openaire +2 more sources
Understanding the Spectral Energy Distributions of the Galactic Star Forming Regions IRAS 18314-0720, 18355-0532 & 18316-0602 [PDF]
, 1999 Embedded Young Stellar Objects (YSO) in dense interstellar clouds is treated self-consistently to understand their spectral energy distributions (SED). Radiative transfer calculations in spherical geometry involving the dust as well as the gas component,
A. Afflerbach +43 more
core +3 more sources