Results 21 to 30 of about 3,726,768 (285)

On the speed of convergence of Newton's method for complex polynomials [PDF]

, 2014
We investigate Newton's method for complex polynomials of arbitrary degree $d$, normalized so that all their roots are in the unit disk. For each degree $d$, we give an explicit set $\mathcal{S}_d$ of $3.33d\log^2 d(1 + o(1))$ points with the following ...
Aspenberg, Magnus, Bilarev, Todor, Schleicher, Dierk   +2 more
core   +1 more source

Feasibility Study on the Application of Dynamic Elastic Rock Properties from Well Log for Shale Hydrocarbon Development of Brownshale Formation in the Bengkalis Trough, Central Sumatra Basin, Indonesia.

JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2021
In modeling the hydraulic fracking program for unconventional reservoir shales, information about elasticity rock properties is needed, namely Young's Modulus and Poisson's ratio as the basis for determining the formation depth interval with high ...
Ahmad Muraji Suranto, Aris Buntoro, Carolus Prasetyadi, Ricky Adi Wibowo   +3 more
doaj   +1 more source

Lithology identification using semantic segmentation for well log data [PDF]

REM: International Engineering Journal
In the past decade, machine learning techniques were responsible for a revolution in classification and regression tasks, making it possible to automate some laborious activities, saving time and reducing errors.
Áttila Leães Rodrigues, Fernanda Gontijo Fernandes Niquini, Sandro Pinzon, João Felipe Coimbra Leite Costa   +3 more
doaj   +1 more source

Diameters in preferential attachment models [PDF]

, 2009
In this paper, we investigate the diameter in preferential attachment (PA-) models, thus quantifying the statement that these models are small worlds. The models studied here are such that edges are attached to older vertices proportional to the degree ...
A. Rudas, A.-L. Barabási, A.-L. Barabási, B. Bollobás, B. Bollobás, B. Bollobás, B. Bollobás, B. Bollobás, B. Bollobás, B. Bollobás, B. Bollobás, B. Pittel, C. Cooper, D. Fernholz, F. Chung, F. Chung, F. Chung, F. Chung, G.P. Wadsworth, H. Esker van den, H. Esker van den, H. Reittu, I. Norros, J. Jordan, M. Deijfen, M.E.J. Newman, N. Alon, N. Berger, O. Hagberg, R. Albert, R. Durrett, R. Hofstad van der, R. Hofstad van der, R. Hofstad van der, R. Oliveira, S. Janson, S.N. Dorogovtsev, T.F. Móri, T.F. Móri, W. Aiello, W. Feller   +40 more
core   +5 more sources

Massive Spatial Well Clustering Based on Conventional Well Log Feature Extraction for Fast Formation Heterogeneity Characterization

Lithosphere, 2022
Recent enhancements in computational capacity provide an opportunity for harnessing the enormous amount of reservoir data already acquired and extracting useful information for hydrocarbon exploration, development, and production.
Yupeng Li, Maolin Luo, Shouxiang Ma, Peng Lu   +3 more
doaj   +1 more source

Geostatistical Seismic Inversion Using Well Log Constraints [PDF]

, 1999
Information about reservoir properties usually comes from two sources: seismic data and well logs. The former provide an indirect, low resolution image of rock velocity and density.
Herrmann, Felix, Kane, Jonathan, Rodi, William, Toksoz, M. Nafi   +3 more
core   +1 more source

GEOHYDROLOGIC WELL-LOGGING

Hydrology Research, 1972
Well-logs have been used to gain geohydrologic information mainly in Precambrian rocks. The logs used are the self-potential, the diameter, the temperature, and the electric conductivity of water. Applications have given general information on the occurrence of ground water in hard rocks.
G. JACKS, H. HOUTKAMP
openaire   +1 more source

The EUVE point of view of AD Leo [PDF]

, 2002
All the Extreme Ultraviolet Explorer (EUVE) observations of AD Leo, totalling 1.1 Ms of exposure time, have been employed to analyze the corona of this single M dwarf.
Anders, Brickhouse, Brickhouse, Covino, Cully, Drake, Dupree, Favata, G. Micela, Hawley, Henry, J. Sanz-Forcada, Kimble, Linsky, Marino, Osten, Reale, Rosner, Sanz-Forcada, Sanz-Forcada, Smith, Spiesman   +21 more
core   +2 more sources

Weighted Polynomial Approximations: Limits for Learning and Pseudorandomness [PDF]

, 2014
Polynomial approximations to boolean functions have led to many positive results in computer science. In particular, polynomial approximations to the sign function underly algorithms for agnostically learning halfspaces, as well as pseudorandom ...
Bun, Mark, Steinke, Thomas
core   +3 more sources

Parallel Batch-Dynamic Graph Connectivity

, 2020
In this paper, we study batch parallel algorithms for the dynamic connectivity problem, a fundamental problem that has received considerable attention in the sequential setting.
Awerbuch B., Iyer A., JaJa J., Kejlberg-Rasmussen C., Nanongkai D., Reif J., Reif J. H.   +6 more
core   +1 more source