Results 61 to 70 of about 1,309,218 (220)
Research on Automatic Path Planning Method of Warehouse Inspection Robot
Applied Artificial Intelligence, 2023 The patrol robot is an important guarantee for the safety of the enterprise’s warehouse. However, due to the large number of patrol target points, the automatic path planning of the patrol robot is difficult and inefficient.
Hongyuan Liu, Jianxian Liu
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The role of the central stellar cluster in active galactic nuclei. I. Semi-analytical model [PDF]
, 2002 The subject of the paper is the role of the massive stellar cluster in the activity phenomenon and in the structure of active galactic nuclei. We introduce a simple model of stellar dynamics in the internal part of the cluster, which allows us to include both the star-disk and the star-star interactions.
arxiv +1 more source
S-process in low-mass extremely metal-poor stars
EPJ Web of Conferences, 2012 We present post-processing s-process calculations for the core He-flash of a 1M☉ star with and Z = 10−8. Our model shows neutron densities larger than 1014cm−3, resulting in the production of s-process elements. The model reproduces the C, O, Sr, and Ba
Weiss A., Serenelli A., Cruz M.A.
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Indicators of Mass in Spherical Stellar Atmospheres [PDF]
, 2013 Mass is the most important stellar parameter, but it is not directly observable for a single star. Spherical model stellar atmospheres are explicitly characterized by their luminosity ($L_\star$), mass ($M_\star$) and radius ($R_\star$), and observations can now determine directly $L_\star$ and $R_\star$. We computed spherical model atmospheres for red
arxiv +1 more source
Neutron stars and strange stars in the chiral SU(3) quark mean field model [PDF]
Phys.Rev.C72:045801,2005, 2005 We investigate the equations of state for pure neutron matter and strange hadronic matter in $\beta$-equilibrium, including $\Lambda$, $\Sigma$ and $\Xi$ hyperons. The masses and radii of pure neutron stars and strange hadronic stars are obtained. For a pure neutron star, the maximum mass is about $1.8 M_{\mathrm{sun}}$, while for a strange hadronic ...
arxiv +1 more source
The rotational evolution of young low mass stars [PDF]
Dans Star-Disk Interaction in Young Stars - Star-Disk Interaction
in Young Stars, Grenoble : France (2007), 2007 Star-disk interaction is thought to drive the angular momentum evolution of young stars. In this review, I present the latest results obtained on the rotational properties of low mass and very low mass pre-main sequence stars. I discuss the evidence for extremely efficient angular momentum removal over the first few Myr of pre-main sequence evolution ...
arxiv +1 more source
Bag model and quark star [PDF]
Physical Review D, 2010 In this paper, incorporating the property of the vacuum negative pressure, namely, the bag constant, we presented a new model of the equation of state (EOS) of quark matter at finite chemical potential and zero temperature. By comparing our EOS with Fraga {\it et~al.}'s EOS and SQM1 model, one find that our EOS is softer than Fraga {\it et~al.}'s EOS ...
Hong-Shi Zong, Hua Li, Xin-Lian Luo
openaire +2 more sources
Horizontal Branch stars as AmFm/HgMn stars [PDF]
arXiv, 2008 Recent observations and models for horizontal branch stars are briefly described and compared to models for AmFm stars. The limitations of those models are emphasized by a comparison to observations and models for HgMn stars.
arxiv
Are all metal-poor stars of second-generation? [PDF]
arXiv, 2023 Hydrodynamical cosmological simulations predict that the metal-free Population III (Pop III) stars were likely very massive and, therefore, short-lived. However, they left their chemical imprint on their descendants, which can also have masses $ < 0.8 \mathrm {M_{\odot}}$ and still be alive today.
arxiv
Analyzing Inflation with P – Star Model [PDF]
Faslnāmah-i Pizhūhish/Nāmah-i Iqtisādī, 2010 This paper presents a test of the P* model using Iran quarterly data over the period 1988-2005. The basic formulation of the P* model, which is derived from the quantity theory of money, is manipulated to obtain an equation for the price gap and level of
Javid Bahrami, Maryam Farshchi
doaj