Results 121 to 130 of about 20,917 (306)

Drag Reduction of Crude Oil Flow in Pipelines Using Sodium Dodecyl Benzene Sulfonate Surfactant

open access: yesIraqi Journal of Chemical and Petroleum Engineering, 2007
In the present work, a closed loop circulation system consist of three testing sections was designed and constructed. The testing sections made from (3m) of commercial carbon steel pipe of diameters(5.08, 2.54 and 1.91 cm) .
G. A. R. Rassou, Ali A. A. Hadi
doaj  

Theory of concentration dependence in drag reduction by polymers and of the maximum drag reduction asymptote

open access: yes, 2004
A simple model of the effect of polymer concentration on the amount of drag reduction in turbulence is presented, simulated, and analyzed. The qualitative phase diagram of drag coefficient versus Reynolds number (Re) is recaptured in this model ...
Ching, ESC   +5 more
core   +1 more source

A Unifying Approach to Self‐Organizing Systems Interacting via Conservation Laws

open access: yesAdvanced Intelligent Discovery, EarlyView.
The article develops a unified way to model and analyze self‐organizing systems whose interactions are constrained by conservation laws. It represents physical/biological/engineered networks as graphs and builds projection operators (from incidence/cycle structure) that enforce those constraints and decompose network variables into constrained versus ...
F. Barrows   +7 more
wiley   +1 more source

Low-SNR asymptote of CRB on SNR estimates for BPSK in Nakagami-m fading channels with diversity combining

open access: yes, 2003
A simple closed-form expression is derived for the low signal-to-noise ratio (SNR) asymptote of the Cramer-Rao bound (CRB) for estimating the SNR of binary phase shift keying modulated signals received over Nakagami-m fading channels with L branch equal ...

core   +1 more source

Robot‐Assisted Measurement of the Critical Micelle Concentration

open access: yesAdvanced Intelligent Systems, Volume 7, Issue 3, March 2025.
The study introduces (SIMO) smart integrator for manual operations, a robotic platform for precise, repeatable determination of (CMC) critical micelle concentration in surfactants. SIMO reduces standard deviation by 80% compared to manual methods. Surfactant, dye, and diluent selection, robotic protocols, and data handling are detailed.
Vincenzo Scamarcio   +3 more
wiley   +1 more source

On asymptotic extrapolation

open access: yesJournal of Symbolic Computation, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Mean asymptote (“a”), curvature (“b”) and R2 values for each comparison of landmark displacement and EMG amplitude for sub-maximal contraction.

open access: yes, 2016
Mean asymptote (“a”), curvature (“b”) and R2 values for each comparison of landmark displacement and EMG amplitude for sub-maximal contraction.
Ryan E. Stafford (834526)   +3 more
core   +1 more source

A Memristor‐Based In‐Memory Computing System‐on‐Chip with Efficient Depthwise Convolution

open access: yesAdvanced Intelligent Systems, EarlyView.
We present a memristor‐based in‐memory computing (IMC) architecture that enables efficient depthwise convolution (DWC) acceleration. Fabricated in a system‐on‐chip with crossbar arrays, the design improves memory utilization. Experimental validation demonstrates the first hardware acceleration of DWC in IMC, achieving a digital comparable inference ...
Wenhao Song   +21 more
wiley   +1 more source

An electrostatic micro-electromechanical systems micromirror with low-torsional stress supported by three-asymptote beam

open access: yesChip
Micro-electromechanical systems (MEMS) micromirrors are preferred actuators in the field of light beam steering. Electrostatic micromirrors have gained vital attention due to their simple and compact structure.
Xiao-Yong Fang   +5 more
doaj   +1 more source

Optical manipulation of long-range interactions at the 3s+3p asymptote of Na

open access: yes, 2003
We investigate the influence of a laser field, which is near-resonant to the atomic sodium 32P1/2 $\rightarrow$ 32D3/2 transition, on the last bound levels of the A$^1\Sigma^+_u$ state in Na2.
St. Falke   +6 more
core   +1 more source

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