Results 31 to 40 of about 3,713,734 (286)

Threesomes, Degenerates, and Love Triangles [PDF]

, 2014
The 3SUM problem is to decide, given a set of $n$ real numbers, whether any three sum to zero. It is widely conjectured that a trivial $O(n^2)$-time algorithm is optimal and over the years the consequences of this conjecture have been revealed. This 3SUM
Grønlund, Allan, Pettie, Seth
core   +1 more source

Predicting total organic carbon from few well logs aided by well-log attributes

Petroleum, 2023
Derivative/volatility well-log attributes from very few commonly recorded well logs can assist in the prediction of total organic carbon (TOC) in shales and tight formations.
David A. Wood
doaj   +1 more source

Dynamic and Multi-functional Labeling Schemes

, 2014
We investigate labeling schemes supporting adjacency, ancestry, sibling, and connectivity queries in forests. In the course of more than 20 years, the existence of $\log n + O(\log \log)$ labeling schemes supporting each of these functions was proven ...
A Korman, A Korman, C Gavoille, C Gavoille, D Adjiashvili, D Peleg, D Peleg, E Cohen, M Lewenstein, N Rotbart, P Fraigniaud, S Alstrup   +11 more
core   +1 more source

Orthogonal Matching Pursuit: A Brownian Motion Analysis [PDF]

, 2011
A well-known analysis of Tropp and Gilbert shows that orthogonal matching pursuit (OMP) can recover a k-sparse n-dimensional real vector from 4 k log(n) noise-free linear measurements obtained through a random Gaussian measurement matrix with a ...
Fletcher, Alyson K., Rangan, Sundeep
core   +1 more source

Log-Poisson Hierarchical Clustering of Cosmic Neutral Hydrogen and Ly-alpha Transmitted Flux of QSO Absorption Spectrum

, 2008
we study, in this paper, the non-Gaussian features of the mass density field of neutral hydrogen fluid and the Ly-alpha transmitted flux of QSO absorption spectrum from the point-of-view of self-similar log-Poisson hierarchy.
Cole, Fang, Fang, Feng, Feng, Feng, Frisch, Gurbatov, He, He, Jamkhedkar, Jamkhedkar, Kim, Kolmogorov, Landau, Lazrian, Leveque, Li-Zhi Fang, Liu, Liu, Liu, Monin, Padoan, Pando, Pando, Peebles, Yang, Yao-Quan Chu, Yi Lu, Zhang, Zheng   +30 more
core   +1 more source

Multivariate imputation via chained equations for elastic well log imputation and prediction

Applied Computing and Geosciences, 2022
Well logging is essential in studies which require an understanding of the subsurface geology and depositional conditions. Unfortunately, the measurements are rarely complete and missing data intervals are common due to operational issues or malfunction ...
Antony Hallam, Debajoy Mukherjee, Romain Chassagne   +2 more
doaj   +1 more source

Asteroseismic surface gravity for evolved stars [PDF]

, 2013
Context: Asteroseismic surface gravity values can be of importance in determining spectroscopic stellar parameters. The independent log(g) value from asteroseismology can be used as a fixed value in the spectroscopic analysis to reduce uncertainties due ...
Basu, Sarbani, Chaplin, W. J., Elsworth, Y., Hekker, S., Kallinger, T., Mosser, B., Stello, D.   +6 more
core   +5 more sources

A Systematic Review of Evidence on the Clinical Effectiveness of Surveillance Imaging in Children With Medulloblastoma and Ependymoma

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Surveillance imaging aims to detect tumour relapse before symptoms develop, but it's unclear whether earlier detection of relapse leads to better outcomes in children and young people (CYP) with medulloblastoma and ependymoma. This systematic review aims to identify relevant literature to determine the efficacy of surveillance magnetic ...
Lucy Shepherd, Melissa Taylor, Helen Fulbright, Bob Phillips   +3 more
wiley   +1 more source

Well Log Generation Based on Hybrid Ensemble Learning Model

Cejing jishu
Well logs play a crucial role in reservoir evaluation and oil and gas resource assessment. However, the shortage issue of some well logs always exists in practical applications. The well log data are remeasured through a drilling procedure involving high
WANG Xiaoyu, LIAO Guangzhi, XIAO Lizhi, HUANG Wensong, KONG Xiangwen, ZHAO Zibin   +5 more
doaj   +1 more source

Prognostic Impact of Treatment Modalities, Including Targeted Compartmental Radio‐Immunotherapy, in a Cohort of Neuroblastoma Patients With CNS Metastases at Relapse

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Neuroblastoma (NB) with central nervous system (CNS) metastases is rare at diagnosis, but occurs more often during relapse/progression. Patients with CNS metastases face a dismal prognosis, with no standardized curative treatment available.
Vicente Santa‐Maria Lopez, Anna Felip‐Badia, Marina Caballero‐Bellon, Nazaret Sanchez‐Sierra, Alicia Castañeda, Moira Garraus, Maite Gorostegui, Margarida Simão‐Rafael, Juan Pablo Muñoz, Marta Perez‐Somarriba, Salvador Mañe, Mariana Cecilia Planells, Sara Perez‐Jaume, Jaume Mora   +13 more
wiley   +1 more source