搜索结果: 1-15 共查到“理学 Diameter”相关记录21条 . 查询时间(0.098 秒)
Extrinsic versus intrinsic diameter for Riemannian filling-discs and van Kampen diagrams
Riemannian filling-discs van Kampen diagrams
2015/8/26
The diameter of a disc filling a loop in the universal covering of a Riemannian manifold M may be measured extrinsically using the distance function on the ambient space or intrinsically using the ind...
Depth-diameter ratios of lunar craters from chandrayaan-1 TMC images and DEM and its significance
Chandrayaan-1, TMC Depth-Diameter
2014/11/11
The most common features observed on the lunar surface are its craters. They differ from each
other in terms of age, composition and origin. Craters are the crustal depressions or areas of
negativ...
Correlation between Solar Semi-Diameter and Geomagnetic Time Series
Solar Diameter Geomagnetic Series Correlation Time Series
2013/3/7
We study the correlation between geomagnetic and solar semi-diameter measurements made at two of our ground stations (Vassouras and Rio de Janeiro, Brazil). The study comprises the period from March 1...
On the Ratio of Circumference to Diameter for the Largest Observable Circles: An Empirical Approach
On the Ratio of Circumference Diameter the Largest Observable Circles Empirical Approach Instrumentation and Methods for Astrophysics
2012/4/19
I present here a measurement of pi as determined for the largest observable circles. Intriguingly, the value of 16/5 asserted by the House of Representatives of the State of Indiana in 1897 is still v...
Study on Diameter Distribution of Natural Secondary Forest
Average Diameter at Breast Height Diameter Distribution Secondary Forest Stand Description Factor
2011/12/21
This study used 45 permanent sample plots investigated in 2007 and 6 permanent sample plots investigated in 2008 in Mao’er Mountain natural secondary forest area and 68 permanent plots investigated in...
The 55 Cancri System: Fundamental Stellar Parameters, Habitable Zone Planet, and Super-Earth Diameter
Cancri System: Fundamental Stellar Parameters Super-Earth Diameter
2011/9/30
The bright star 55 Cancri is known to host five planets, including a transiting super-Earth. We use the CHARA Array to directly determine the following of 55 Cnc's stellar astrophysical parameters: $R...
On the polygonal diameter of the interior, resp. exterior, of a simple closed polygon in the plane
Jordan-Brouwer theorem Jordan exterior (interior) Jordan’s curve theorem
2011/2/21
We give a tight upper bound on the polygonal diameter of the interior, resp. exterior, of a simple n-gon, n ≥ 3, in the plane as a function of n, and describe an n-gon (n ≥ 3) for which both upper bou...
There are only finitely many distance-regular graphs with valency k at least three, fixed ratio k2/k and large diameter
distance-regular graphs Bannai-Ito Conjecture
2011/1/21
In this paper, we show that for given positive integer C, there are only finitely many distance-regular graphs with valency k at least three, diameter D at least six and k2
k ≤ C. This extends a conj...
The competition numbers of Hamming graphs with diameter at most three
Hamming graphs diameter
2010/11/18
The competition graph of a digraph D is a graph which has the same vertex set as D and has an edge between x and y if and only if there exists a vertex v in D such that (x,v) and (y,v) are arcs of D. ...
Power Spectrum Analysis of Mount-Wilson Solar Diameter Measurements: Evidence for Solar Internal R-mode Oscillations
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
This article presents a power-spectrum analysis of 39,024 measurements of the solar diameter made at the Mount Wilson Observatory from 1968.670 to 1997.965. This power spectrum contains a number of ve...
The distribution of height and diameter in random non-plane binary trees
distribution of height diameter in random non-plane binary trees
2010/12/1
This study is dedicated to precise distributional analyses of the height of non-plane unlabelled binary trees (“Otter trees”), when trees of a given size are taken with equal likelihood. The height of...
Geodesic diameter of sets defined by few quadratic equations and inequalities
Geodesic diameter of sets defined quadratic equations nequalities
2010/11/29
We prove a bound for the geodesic diameter of a subset of the unit ball in Rn described by a fixed number of quadratic equations and inequalities,which is polynomial in n, whereas the known bound for ...
Unsteady Flow to a Non-Penetrating Large Diameter Well in Extensive Aquifers
Unsteady Flow Non-Penetrating Large Diameter Well Extensive Aquifers
2009/10/27
Non-equilibrium groundwater movement equations are written explicitly for
the continuity and flow laws in the case of a non-penetrating large diameter
well discharging from extensively thick confine...
Drawdown Distribution During Recovery around a Large Diameter Well
Drawdown Distribution Recovery Large Diameter Well
2009/10/26
An analytical solution is presented for the drawdown distribution in a large
diameter well during recovery. It takes into consideration the well storage. A
set of type curves are given to determine ...
Classification of Regular Planar Graphs with Diameter two
graph regular diameter planar outer planar
2007/12/11
In the present paper, the regular planar graphs with diameter two are classified.