Results 51 to 60 of about 185,528 (178)

Statistics of the relative velocity of particles in turbulent flows : monodisperse particles

, 2017
We use direct numerical simulations to calculate the joint probability density function of the relative distance $R$ and relative radial velocity component $V_R$ for a pair of heavy inertial particles suspended in homogeneous and isotropic turbulent ...
Bhatnagar, Akshay, Gustavsson, K., Mitra, Dhrubaditya   +2 more
core   +1 more source

An efficient algorithm for line extraction from laser scans [PDF]

, 2004
In this paper, an algorithm for extracting line segments from information gathered by a laser rangefinder is presented. The range scan is processed to compute a parameter that is invariant to the position and orientation of straight lines present.
Alempijevic, A, Dissanayake, G
core  

Geometric and algebraic classification of quadratic differential systems with invariant hyperbolas

Electronic Journal of Differential Equations, 2017
Let QSH be the whole class of non-degenerate planar quadratic differential systems possessing at least one invariant hyperbola. We classify this family of systems, modulo the action of the group of real affine transformations and time rescaling ...
Regilene D. S. Oliveira, Alex C. Rezende, Dana Schlomiuk, Nicolae Vulpe   +3 more
doaj  

Measuring (subglacial) bedform orientation, length, and longitudinal asymmetry - Method assessment.

PLoS ONE, 2017
Geospatial analysis software provides a range of tools that can be used to measure landform morphometry. Often, a metric can be computed with different techniques that may give different results.
Marco G Jorge, Tracy A Brennand
doaj   +1 more source

Automatic Registration of Optical Images with Airborne LiDAR Point Cloud in Urban Scenes Based on Line-Point Similarity Invariant and Extended Collinearity Equations

Sensors, 2019
This paper proposes a novel method to achieve the automatic registration of optical images and Light Detection and Ranging (LiDAR) points in urban areas.
Shubiao Peng, Liang Zhang
doaj   +1 more source

On Special Relativity with Cosmological Constant

, 2004
Based on the principle of relativity and the postulate of invariant speed and length, we propose the theory of special relativity with cosmological constant ${\cal SR}_{c,R}$ if the invariant length whose square is the inverse of the one-third ...
Aldrovandi, Amelino-Camelia, Amelino-Camelia, Amelino-Camelia, Bacry, Bacry, Beltrami, Bennett, Bin Zhou, Chao-Guang Huang, Derome, Fock, Gao, Gibbons, Guo, Guo, Guo, Gürsey, Han-Ying Guo, Inönü, Kowalski-Glikman, Kowalski-Glikman, Kuo, Snyder, Spivak, Tegmark, Weinberg, Zhan Xu   +27 more
core   +1 more source

Bootstrapping smooth conformal defects in Chern-Simons-matter theories

Journal of High Energy Physics
The expectation value of a smooth conformal line defect in a CFT is a conformal invariant functional of its path in space-time. For example, in large N holographic theories, these fundamental observables are dual to the open-string partition function in ...
Barak Gabai, Amit Sever, De-liang Zhong
doaj   +1 more source

A Line Feature-Based Rotation Invariant Method for Pre- and Post-Damage Remote Sensing Image Registration

Remote Sensing
The accurate registration of pre- and post-damage images plays a vital role in the change analysis of the target area and the subsequent work of damage effect assessment.
Yalun Zhao, Derong Chen, Jiulu Gong
doaj   +1 more source

Normalizing and Converting Image DC Data Using Scatter Plot Matching

Remote Sensing, 2010
Remote sensing image data from sources such as Landsat or airborne multispectral digital cameras are typically in the form of digital count (DC) values.
Stephan J. Maas, Nithya Rajan
doaj   +1 more source

Equidistant hypersurfaces of the bidisk

, 2012
The following are notes on the geometry of the bidisk. In particular, we examine the properties of equidistant surfaces in the bidisk.Comment: 12 pages, 4 figures.
Charette, Virginie, Drumm, Todd A., Lareau-Dussault, Rosemonde   +2 more
core   +1 more source