Results 31 to 40 of about 523,816 (270)

Experimental investigation of changes in petrophysical properties and structural deformation of carbonate reservoirs

Petroleum Exploration and Development, 2019
To examine the effect of pressure on pore structure and petrophysical properties of carbonate rock, the porosity, permeability, CT scanning, SEM and elastic wave velocity of two carbonate core plug samples from an oilfield in Southwest Iran were analyzed
Yaser SALIMIDELSHAD, Ali MORADZADEH, Ezatallah KAZEMZADEH, Peyman POURAFSHARY, Abbas MAJDI   +4 more
doaj   +1 more source

Improved Convergence Speed of a DCD-Based Algorithm for Sparse Solutions

Algorithms, 2020
To solve a system of equations that needs few updates, such as sparse systems, the leading dichotomous coordinate descent (DCD) algorithm is better than the cyclic DCD algorithm because of its fast speed of convergence.
Zhi Quan, Shuhua Lv
doaj   +1 more source

Enumerating Cyclic Orientations of a Graph [PDF]

, 2015
Acyclic and cyclic orientations of an undirected graph have been widely studied for their importance: an orientation is acyclic if it assigns a direction to each edge so as to obtain a directed acyclic graph (DAG) with the same vertex set; it is cyclic ...
A Itai, B Bollobas, DC Fisher, DS Johnson, MB Squire, N Alon, N Linial, O Pikhurko, P Erdős, RE Tarjan, RP Stanley, VC Barbosa   +11 more
core   +4 more sources

Cyclic nucleotide-gated channels: structural basis of ligand efficacy and allosteric modulation [PDF]

, 1997
Most working proteins, including metabolic enzymes, transcription regulators, and membrane receptors, transporters, and ion channels, share the property of allosteric coupling. The term 'allosteric' means that these proteins mediate indirect interactions
Lester, Henry A., Li, Jun, Zagotta, William N.   +2 more
core   +1 more source

Different types of cyclic steps nearby Manila Trench of northern South China Sea and analysis of forming mechanism

Frontiers in Marine Science
High-resolution multibeam bathymetric enables detailed morphological investigation of the area of Manila Trench on the northeastern South China Sea margin, where twenty-three cyclic steps are observed.
Yuping Yang, Yuping Yang, Shuwei Zhang, Shuwei Zhang, Shuang Li, Kaiqi Yu, Kaiqi Yu, Xuesheng Qian, Xuesheng Qian, Xuesheng Qian, Chenghao Wang, Jingping Xu   +11 more
doaj   +1 more source

Second Order Differences of Cyclic Data and Applications in Variational Denoising

, 2014
In many image and signal processing applications, as interferometric synthetic aperture radar (SAR), electroencephalogram (EEG) data analysis or color image restoration in HSV or LCh spaces the data has its range on the one-dimensional sphere $\mathbb S ...
Bergmann, Ronny, Laus, Friederike, Steidl, Gabriele, Weinmann, Andreas   +3 more
core   +1 more source

Mechanistic insight into the conserved allosteric regulation of periplasmic proteolysis by the signaling molecule cyclic-di-GMP

eLife, 2014
Stable surface adhesion of cells is one of the early pivotal steps in bacterial biofilm formation, a prevalent adaptation strategy in response to changing environments.
Debashree Chatterjee, Richard B Cooley, Chelsea D Boyd, Ryan A Mehl, George A O'Toole, Holger Sondermann   +5 more
doaj   +1 more source

Fast rank-based normalization of miRNA qPCR arrays using support vector regression

Informatics in Medicine Unlocked, 2023
One of the first important steps in elucidating the function of microRNAs (miRNAs) is expression profiling. Many methods including low-density qPCR arrays are increasingly used to profile the expression of miRNAs.
Ali Mohammadian, Zahra Mortezaei, Yaser NejatyJahromy   +2 more
doaj   +1 more source

A cyclic time-dependent Markov process to model daily patterns in wind turbine power production [PDF]

, 2013
Wind energy is becoming a top contributor to the renewable energy mix, which raises potential reliability issues for the grid due to the fluctuating nature of its source.
Estanqueiro, Ana, Lopes, Vitor V., Scholz, Teresa   +2 more
core   +2 more sources

Polyimide polymers provide higher char yield for graphitic structures [PDF]

, 1970
Technique for manufacture of graphite composites uses high-char-forming processable polyimide resin systems to produce the graphitic matrix.
Burns, E. A., Jones, J. F., Lubowitz, H. R.   +2 more
core   +1 more source