Results 11 to 20 of about 3,284,055 (141)

Intelligent Technology for Well Logging Analysis [PDF]

, 2006
Well logging analysis plays an essential role in petroleum exploration and exploitation. It is used to identify the pay zones of gas or oil in the reservoir formations. This paper applies intelligent technology for well logging analysis, particular combining data mining and expert system together, and proposes an intelligent system for well log ...
Zhongzhi Shi, Ping Luo, Yalei Hao, Guohe Li, Markus Stumptner, Qing He, Gerald Quirchmayr   +6 more
openaire   +1 more source

Correlations among global photometric properties of disk galaxies [PDF]

, 1999
Using a two-dimensional galaxy image decomposition technique, we extract global bulge and disk parameters for a complete sample of early type disk galaxies in the near infrared K band.
Ajit Kembhavi, Andredakis Y. C., Bingelli B., Bingelli B., Caon N., Combes F., de Vaucouleurs G., Habib G. Khosroshahi, Michard R., Yogesh Wadadekar   +9 more
core   +3 more sources

The evolution of HI and CIV quasar absorption line systems at 1.9 < z < 3.2

, 2013
We have investigated the distribution and evolution of ~3100 intergalactic HI absorbers with HI column densities log N(HI) = [12.75, 17.0] at 1.9 < z < 3.2, using 18 high resolution, high S/N quasar spectra obtained from the ESO VLT/UVES archive. We used
Carswell, Robert F., Kim, Tae-Sun, Müller, Volker, Partl, Adrian M.   +3 more
core   +1 more source

Using Optimization to Obtain a Width-Independent, Parallel, Simpler, and Faster Positive SDP Solver [PDF]

, 2016
We study the design of polylogarithmic depth algorithms for approximately solving packing and covering semidefinite programs (or positive SDPs for short). This is a natural SDP generalization of the well-studied positive LP problem.
Allen-Zhu, Zeyuan, Lee, Yin Tat, Orecchia, Lorenzo   +2 more
core   +1 more source

New southern blue compact dwarf galaxies in the 2dF Galaxy Redshift Survey [PDF]

, 2006
Aiming to find new extremely metal-deficient star-forming galaxies we extracted from the Two-Degree Field Galaxy Redshift Survey (2dFGRS) 100K Data Release 14 emission-line galaxies with relatively strong [OIII] 4363 emission.
Alvensleben, Asplund, Binggeli, Binggeli, Bothun, Cairós, Caldwell, Campbell, Campbell, Carignan, Colless, Doublier, Drinkwater, Fioc, Fricke, Gil de Paz, Gil de Paz, Guseva, Guseva, Guseva, Hidalgo-Gámez, Hopp, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, K. G. Noeske, K. J. Fricke, Kehrig, Kobulnicky, Kraan-Korteweg, Kunth, Landolt, Maddox, Marlowe, Masegosa, N. G. Guseva, Noeske, Noeske, Noeske, P. Papaderos, Pagel, Pagel, Papaderos, Papaderos, Papaderos, Papaderos, Patterson, Peimpert, Peimpert, Petrosian, Pilyugin, Pustilnik, Richer, Salzer, Salzer, Salzer, Sargent, Schlegel, Searle, Stasinska, T. X. Thuan, Takamiya, Telles, Terlevich, Thuan, Thuan, Tosi, van Zee, van Zee, Vigroux, Y. I. Izotov   +79 more
core   +2 more sources

Quantum Discriminant Analysis for Dimensionality Reduction and Classification

, 2016
We present quantum algorithms to efficiently perform discriminant analysis for dimensionality reduction and classification over an exponentially large input data set.
Cong, Iris, Duan, Luming
core   +1 more source

BlogForever D5.1: Design and Specification of Case Studies [PDF]

, 2013
This document presents the specification and design of six case studies for testing the BlogForever platform implementation process. The report explains the data collection plan where users of the repository will provide usability feedback through ...
Arango-Docio, S., Farrell, T., Gkotsis, G., Kopidaki, S., Pinsent, E., Rynning, M., Sleeman, P.   +6 more
core   +1 more source

Triple-ionised carbon associated with the low-density neutral hydrogen gas at 1.7 < z < 3.3: the integrated N(HI)-N(CIV) relation

, 2016
From the Voigt profile fitting analysis of 183 intervening CIV systems at 1.7 < z < 3.3 in 23 high-quality UVES/VLT and HIRES/Keck QSO spectra, we find that a majority of CIV systems (~75%) display a well-characterised scaling relation between integrated
Barai, P., Carswell, R. F., Criatiani, S., Kim, Tae-Sun, Mongardi, C., Muecket, J. P., Partl, A. M.   +6 more
core   +1 more source

Stackelberg Network Pricing Games [PDF]

, 2007
We study a multi-player one-round game termed Stackelberg Network Pricing Game, in which a leader can set prices for a subset of $m$ priceable edges in a graph. The other edges have a fixed cost.
Briest, Patrick, Hoefer, Martin, Krysta, Piotr   +2 more
core   +10 more sources

Surface abundances of light elements for a large sample of early B-type stars - IV. The magnesium abundance in 52 stars - a test of metallicity

, 2005
From high-resolution spectra a non-LTE analysis of the MgII 4481.2 A feature is implemented for 52 early and medium local B stars on the main sequence (MS). The influence of the neighbouring line AlIII 4479.9 A is considered.
Allende Prieto, Allende Prieto, Asplund, Asplund, Cunha, D. B. Poklad, D. L. Lambert, Daflon, Daflon, Daflon, Daflon, Daflon, Gies, Gonzalez, Gonzalez, Heger, Holweger, Kilian, Kilian, Kupka, Kurucz, L. S. Lyubimkov, Lodders, Lyubimkov, Lyubimkov, Lyubimkov, Lyubimkov, Lyubimkov, Maeder, Mihalas, Nissen, Przybilla, S. I. Rostopchin, T. M. Rachkovskaya, Tull   +34 more
core   +1 more source