scholarly journals Four-dimensional phase space measurement using multiple two-dimensional profiles

2019 ◽  
Vol 943 ◽  
pp. 162438
Author(s):  
Minwen Wang ◽  
Zhongming Wang ◽  
Di Wang ◽  
Wolong Liu ◽  
Baichuan Wang ◽  
...  
Keyword(s):  
Phase Space ◽  
Two Dimensional ◽  
Dimensional Phase Space ◽  
Space Measurement

A one-dimensional self-gravitating stellar gas

1966 ◽  
Vol 25 ◽  
pp. 46-48 ◽  
Author(s):  
M. Lecar
Keyword(s):  
Gravitational Field ◽  
Phase Space ◽  
Motion Picture ◽  
Space Distribution ◽  
Two Dimensional ◽  
One Dimensional ◽  
Phase Space Distribution ◽  
Dimensional Phase Space ◽  
The Mean

“Dynamical mixing”, i.e. relaxation of a stellar phase space distribution through interaction with the mean gravitational field, is numerically investigated for a one-dimensional self-gravitating stellar gas. Qualitative results are presented in the form of a motion picture of the flow of phase points (representing homogeneous slabs of stars) in two-dimensional phase space.

scholarly journals Effects of Vegetation and Topography on the Boundary Layer Structure above the Amazon Forest

2020 ◽  
Vol 77 (8) ◽  
pp. 2941-2957
Author(s):  
Marcelo Chamecki ◽  
Livia S. Freire ◽  
Nelson L. Dias ◽  
Bicheng Chen ◽  
Cléo Quaresma Dias-Junior ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Phase Space ◽  
Vertical Structure ◽  
Layer Structure ◽  
Roughness Sublayer ◽  
Large Contribution ◽  
Amazon Forest ◽  
Two Dimensional ◽  
Dimensional Phase Space ◽  
Field Campaigns

Abstract Observational data from two field campaigns in the Amazon forest were used to study the vertical structure of turbulence above the forest. The analysis was performed using the reduced turbulent kinetic energy (TKE) budget and its associated two-dimensional phase space. Results revealed the existence of two regions within the roughness sublayer in which the TKE budget cannot be explained by the canonical flat-terrain TKE budgets in the canopy roughness sublayer or in the lower portion of the convective ABL. Data analysis also suggested that deviations from horizontal homogeneity have a large contribution to the TKE budget. Results from LES of a model canopy over idealized topography presented similar features, leading to the conclusion that flow distortions caused by topography are responsible for the observed features in the TKE budget. These results support the conclusion that the boundary layer above the Amazon forest is strongly impacted by the gentle topography underneath.

scholarly journals First Six Dimensional Phase Space Measurement of an Accelerator Beam

2018 ◽  
Vol 121 (6) ◽  
Author(s):  
Brandon Cathey ◽  
Sarah Cousineau ◽  
Alexander Aleksandrov ◽  
Alexander Zhukov
Keyword(s):  
Phase Space ◽  
Dimensional Phase Space ◽  
Space Measurement

An Investigation on Damage Detection in Aircrafts Panels Using Nonlinear Time Series Analysis

2007 ◽  
Vol 347 ◽  
pp. 213-218 ◽  
Author(s):  
Irina Trendafilova ◽  
Emil Manoach ◽  
Matthew P. Cartmell ◽  
Wiesław M. Ostachowicz ◽  
Arkadiusz Zak
Keyword(s):  
Phase Space ◽  
Vibration Response ◽  
Fe Model ◽  
Two Dimensional ◽  
Orthotropic Plates ◽  
Fe Modelling ◽  
Dimensional Phase Space ◽  
Damage States ◽  
Low Sensitivity ◽  
Aircraft Panels

This study investigates a possibility for representing, interpreting and visualising the vibration response of aircraft panels using time domain measurements. The aircraft panels are modelled as thin orthotropic plates and their vibration response is simulated using FE modelling. The vibration response of a thin aluminium panel is simulated using FE modelling. The first ten resonant frequencies are estimated for the FE model and for the dynamically tested panel. They were found to show somewhat low sensitivity to damage. Then the simulated vibration response of the panel is transformed and expanded in a new phase space. This presents an alternative way to study and analyse the dynamics of a structure. A two dimensional phase space is used in this investigation. Thus instead of studying the single dimension measured vibration characteristics one is faced with expanded two dimensional variables which can be visualised and this facilitates the comparison between the damaged and the non-damage states.

scholarly journals PLANAR SYSTEM AND w∞ ALGEBRA

2005 ◽  
Vol 20 (37) ◽  
pp. 2861-2871 ◽  
Author(s):  
JAMILA DOUARI
Keyword(s):  
Phase Space ◽  
Heisenberg Algebra ◽  
Two Dimensional ◽  
Planar System ◽  
Exotic Particles ◽  
Dimensional Phase Space

We study the exotic particles symmetry in the background of noncommutative two-dimensional phase-space leading to realize in physics the deformed version of Cλ-extended Heisenberg algebra and ω∞ symmetry.

scholarly journals CANONICAL TRANSFORMATIONS IN THREE-DIMENSIONAL PHASE-SPACE

2009 ◽  
Vol 24 (25n26) ◽  
pp. 4769-4788 ◽  
Author(s):  
TEKİN DERELİ ◽  
ADNAN TEĞMEN ◽  
TUĞRUL HAKİOĞLU
Keyword(s):  
Phase Space ◽  
Canonical Transformation ◽  
Generating Functions ◽  
General Framework ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Canonical Transformations ◽  
Dimensional Phase Space ◽  
Nambu Bracket ◽  
Definition Of

Canonical transformation in a three-dimensional phase-space endowed with Nambu bracket is discussed in a general framework. Definition of the canonical transformations is constructed based on canonoid transformations. It is shown that generating functions, transformed Hamilton functions and the transformation itself for given generating functions can be determined by solving Pfaffian differential equations corresponding to that quantities. Types of the generating functions are introduced and all of them are listed. Infinitesimal canonical transformations are also discussed. Finally, we show that the decomposition of canonical transformations is also possible in three-dimensional phase space as in the usual two-dimensional one.

scholarly journals Two-dimensional phase-space picture of the photonic crystal Fano laser

2019 ◽  
Vol 100 (5) ◽  
Author(s):  
Piotr M. Kamiński ◽  
Samel Arslanagić ◽  
Jesper Mørk ◽  
Jensen Li
Keyword(s):  
Photonic Crystal ◽  
Phase Space ◽  
Two Dimensional ◽  
Dimensional Phase Space

Assessment of parameters state of neuromuscular cluster in the conditions of the dosed physical activity

10.12737/3860 ◽  
2014 ◽  
Vol 8 (1) ◽  
pp. 1-6
Author(s):  
Рассадина ◽  
Yu. Rassadina ◽  
Попов ◽  
Yuriy Popov ◽  
Карпин ◽  
...  
Keyword(s):  
Physical Activity ◽  
Control System ◽  
Phase Space ◽  
State Vector ◽  
Self Organization ◽  
Neuromuscular System ◽  
Two Dimensional ◽  
Practical Possibility ◽  
Dimensional Phase Space ◽  
State Vector Of System

Parameters of neuromuscular system at the unexercised and trained examinees from a position of the theory of chaos and self-organization are studied. Essential distinction between two studied groups (the trained and unexercised students) is established. Dynamics of involuntary micro-movements of extremities (fingers of hands) in a person as reaction to the dosed physical activity is shown in change of parameters of quasiattractors of characteristics of a tremor. Dynamics of increase in volumes of quasiattractors of a vector of organism state in the unexercised students is revealed. The new technique of research of a control system by movements of a person by means of the analysis of characteristics of a tremor of an extremity in the conditions of physical activity is stated. Practical possibility of application of the method of multidimensional phase spaces of involuntary micro-movement in the assessment of reaction of neuromuscular system of the person on dynamic physical activity is shown. As a measure of state of human neuromuscular system (to loading and after loading) the authors use the quasiattractors of movement of state vector of system in two-dimensional phase space of states.

A Population Study of Integrate-and-Fire-or-Burst Neurons

2002 ◽  
Vol 14 (5) ◽  
pp. 957-986 ◽  
Author(s):  
A.R.R. Casti ◽  
A. Omurtag ◽  
A. Sornborger ◽  
E. Kaplan ◽  
B. Knight ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Phase Space ◽  
Population Study ◽  
Minimal Model ◽  
Population Model ◽  
Realistic Model ◽  
Two Dimensional ◽  
Integrate And Fire ◽  
Dimensional Phase Space ◽  
Dynamic Population

Any realistic model of the neuronal pathway from the retina to the visual cortex (V1) must account for the burstingbehavior of neurons in the lateral geniculate nucleus (LGN). A robust but minimal model, the integrate- and-fire-or-burst (IFB) model, has recently been proposed for individual LGN neurons. Based on this, we derive a dynamic population model and study a population of such LGN cells. This population model, the first simulation of its kind evolving in a two-dimensional phase space, is used to study the behavior of bursting populations in response to diverse stimulus conditions.

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