scholarly journals An averaged projected Robbins-Monro algorithm for estimating the parameters of a truncated spherical distribution

2017 ◽  
Vol 11 (1) ◽  
pp. 1890-1927 ◽  
Author(s):  
Antoine Godichon-Baggioni ◽  
Bruno Portier
Keyword(s):  
Spherical Distribution

scholarly journals Solution of the Problem of Stability of a Stellar System With Emden's Density Law and a Spherical Distribution of Velocities

1987 ◽  
Vol 127 ◽  
pp. 531-548
Author(s):  
V. A. Antonov
Keyword(s):  
Velocity Distribution ◽  
Stellar System ◽  
Stellar Systems ◽  
Spherical Distribution ◽  
Isotropic Distribution ◽  
The Stability

Applying a criterion previously derived by the author, the stability of stellar systems with an isotropic distribution velocity distribution and Emden's polytropic density law is demonstrated for the exponent n = 3/2.

Quantitative comparison of foliage display in two plots of corn

1974 ◽  
Vol 52 (12) ◽  
pp. 2465-2471 ◽  
Author(s):  
W. J. Kyle ◽  
J. A. Davies
Keyword(s):  
Canopy Structure ◽  
Theoretical Models ◽  
Quantitative Comparison ◽  
Distribution Functions ◽  
Radiation Interception ◽  
Spherical Distribution ◽  
Solar Altitude ◽  
Leaf Distribution

A quantitative comparison of foliage display in two plots of corn, seeded differently, revealed that the plants in both have essentially the same architecture despite differences in planting procedure. No significant azimuth preferences were found. Investigations of leaf inclinations indicated that leaf distribution functions are very close to the theoretical spherical distribution, with the result that radiation interception calculations are independent of solar altitude. This greatly facilitates the incorporation of canopy structure variables into theoretical models of canopy radiation interception.

Lp-norm spherical distribution

1997 ◽  
Vol 60 (2) ◽  
pp. 241-260 ◽  
Author(s):  
A.K. Gupta ◽  
D. Song
Keyword(s):  
Spherical Distribution ◽  
Lp Norm

Spherical distribution structure of the semiconductor laser diode stack for pumping

2011 ◽  
Vol 32 (9) ◽  
pp. 094006 ◽  
Author(s):  
Tianzhuo Zhao ◽  
Jin Yu ◽  
Yang Liu ◽  
Xue Zhang ◽  
Yunfeng Ma ◽  
...  
Keyword(s):  
Semiconductor Laser ◽  
Laser Diode ◽  
Spherical Distribution ◽  
Semiconductor Laser Diode ◽  
Distribution Structure

scholarly journals Formation of Spiral Galaxies

1977 ◽  
Vol 45 ◽  
pp. 3-10
Author(s):  
Richard B. Larson
Keyword(s):  
Galaxy Formation ◽  
Globular Clusters ◽  
Spiral Galaxies ◽  
Galactic Plane ◽  
Young Stars ◽  
Spherical Distribution ◽  
Fundamental Significance ◽  
Central Bulge

Conventionally, two major components of spiral galaxies are distinguished: (1) a “spheroidal component”, which includes the central bulge and the surrounding halo, and (2) a “disc component”, which is basically flat and circular but is often warped at the edges. Other structures, such as bars or rings, may also be present, but they are probably of less fundamental significance for the processes of galaxy formation, and therefore they will not be considered here. The distinction between bulge and disc components corresponds approximately to the classical distinction between Population II, as exemplified by the globular clusters which have a nearly spherical distribution, and Population I, which is confined to the galactic plane and is relatively young and metal-rich. However, unlike the “classical” Population II objects which are old and metal-poor, the inner part of the bulge of our galaxy and of other galaxies is in fact metal-rich, and may even contain some young stars.

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