Results 31 to 40 of about 62,392 (177)

Fitting sediment rating curves using regression analysis: a case study of Russian Arctic rivers [PDF]

Proceedings of the International Association of Hydrological Sciences, 2015
Published suspended sediment data for Arctic rivers is scarce. Suspended sediment rating curves for three medium to large rivers of the Russian Arctic were obtained using various curve-fitting techniques.
N. I. Tananaev
doaj   +1 more source

Direct 3D Tomographic Reconstruction and Phase-Retrieval of Far-Field Coherent Diffraction Patterns [PDF]

, 2019
We present an alternative numerical reconstruction algorithm for direct tomographic reconstruction of a sample refractive indices from the measured intensities of its far-field coherent diffraction patterns.
Andersen, Martin Skovgaard, Andreasen, J. W., Grønager, Bastian E., Ramos, T.   +3 more
core   +2 more sources

Improvement of Levenberg-Marquardt algorithm during history fitting for reservoir simulation

Petroleum Exploration and Development, 2016
In order to estimate reservoir parameters more effectively by history fitting, DE (Differential Evolution) was proposed to estimate the optimum damping factor so that the standard Levenberg-Marquardt algorithm was improved, and the improved algorithm was
Xian ZHANG, A A AWOTUNDE
doaj   +1 more source

Utilization of artificial intelligence approach for prediction of DLP values for abdominal CT scans: A high accuracy estimation for risk assessment

Frontiers in Public Health, 2022
PurposeThis study aimed to evaluate Artificial Neural Network (ANN) modeling to estimate the significant dose length product (DLP) value during the abdominal CT examinations for quality assurance in a retrospective, cross-sectional study.MethodsThe ...
H. O. Tekin, H. O. Tekin, Faisal Almisned, T. T. Erguzel, Mohamed M. Abuzaid, W. Elshami, Antoaneta Ene, Shams A. M. Issa, Shams A. M. Issa, Hesham M. H. Zakaly, Hesham M. H. Zakaly   +10 more
doaj   +1 more source

Klasifikasi Status Gizi Balita Menggunakan Metode Backpropagation Dengan Algoritma Levenberg-Marquardt dan Inisialisasi Nguyen Widrow

Jurnal Masyarakat Informatika, 2021
Banyaknya  Kasus  Gizi  Buruk  pada  anak-anak  usia  di  bawah  lima  tahun  umumnya  ditemukan  akibat ketidaktahuan terhadap permasalahan gizi pada anak.
Wildan Azka Adzani, Priyo Sidik Sasongko
doaj   +1 more source

Making Reassignment Adjustable: the Levenberg-Marquardt Approach [PDF]

, 2011
accepted for publication, to appear in Proc. of IEEE Int. Conf. on Acoust., Speech and Signal Proc. ICASSP-12, Kyoto (Japan), March 25-30, 2012.International audienceThis paper presents a new time-frequency reassignment process of the spectrogram, called
Auger, François, Chassande-Mottin, E., Flandrin, Patrick   +2 more
core   +3 more sources

Five planets and an independent confirmation of HD 196885Ab from Lick Observatory [PDF]

, 2009
We present time series Doppler data from Lick Observatory that reveal the presence of long-period planetary companions orbiting nearby stars. The typical eccentricity of these massive planets are greater than the mean eccentricity of known exoplanets ...
Andrew Howard, Butler, Chatterjee, Chris McCarthy, Debra Fischer, ESA, Fischer, Ford, Ford, Geoffrey W. Marcy, Gregory W. Henry, Henry, Howard, Howard Isaacson, Jason T. Wright, Jeff Valenti, John Asher Johnson, Johnson, Jurić, Katherine Peek, Marcy, Marcy, Matt Giguere, Mayor, Peter Driscoll, Saar, Saar, Sato, Schneider, sDemarque, Takeda, Valenti, Valenti, Wright   +33 more
core   +2 more sources

Comparison methods of short term electrical load forecasting

MATEC Web of Conferences, 2018
The supply of electricity that exceeds the load requirement results in the occurrence of electrical power losses. To provide the appropriate power supply to these needs, there must be a plan for the provision of electricity by making prediction or ...
Hartono, Marifa Ahmad Arif, Sadikin M.
doaj   +1 more source

Non-linear optimization of the material constants in Ogden's strain-energy function for incompressible isotropic elastic materials [PDF]

, 1981
The Levenberg—Marquardt non—linear least squares optimization algorithm is adapted to compute the material constants in Ogden' s strain—energy function for incompressible isotropic elastic materials. In previous papers, three terms have been included in
Ogden, R W, Twizell, E H
core  

Use of Parameter Estimation for Stereolithography Surface Finish Improvement [PDF]

, 2005
In order to improve Stereolithography (SLA) surface finish, a systematic approach based on estimation of process parameters is needed. In this paper, the exposure on a desired SLA build surface is formulated as a function of process parameters.
Rosen, David W., Sager, Benay
core   +1 more source