Results 61 to 70 of about 596,957 (302)

Quantitative Strata Calibration Method Based on the Reflection Coefficient Proportions

CT Lilun yu yingyong yanjiu
Strata calibration is the foundation of stratigraphic interpretation and reservoir analysis. Currently used calibration methods qualitatively compare geological interfaces with wave peaks, troughs, and other features, thus emphasizing the depth-time ...
Xing MU, Tao MENG, Haoran YANG, Jianguo SONG   +3 more
doaj   +1 more source

Bandwidth Enhancement of Antenna Arrays Utilizing Mutual Coupling between Antenna Elements

International Journal of Antennas and Propagation, 2010
The mutual coupling effect between antenna elements on an array's bandwidth is investigated using scattering parameters instead of the mutual impedance. First, an approximate expression is derived for matched voltage standing wave ratio (VSWR) bandwidth ...
Min Wang, Wen Wu, Zhongxiang Shen
doaj   +1 more source

Four-wave mixing on thermal nonlinearity in a scheme with positive feedback [PDF]

Компьютерная оптика, 2018
The influence of feedback for both signal and object waves on the amplitude reflection coefficient of a four-wave radiation converter on thermal nonlinearity has been considered.
Aleksandr Akimov, Salavat Guzairov, Valery Ivakhnik   +2 more
doaj   +1 more source

Membrane Reflection Coefficient

, 1981
Department of Chemistry, Bhagalpur University, Bhagalpur-812 007 Manuscript received 25 February 1980, revised 16 September 1980, accepted 10 March 1981 Membrane Reflection ...
S. N. JHA, S. P. JHA, Md. ZAKARIA
openaire   +1 more source

Retractions in Rheumatology: Trends, Causes, and Implications for Research Integrity

Arthritis Care &Research, EarlyView.
Objective We aimed to describe the trends and main reasons for study retraction in rheumatology literature. Methods We reviewed the Retraction Watch database to identify retracted articles in rheumatology. We recorded the main study characteristics, authors’ countries, reasons for retraction, time from publication to retraction, and trends over time ...
Anna Maria Vettori, Michele Iudici
wiley   +1 more source

REFLECTION OF WAVES FROM HYDROTECHNICAL STRUCTURES IN DETERMINING THE PORT WATER WAVES

International Journal for Computational Civil and Structural Engineering
The article considers the influence of taking into account wave reflection and the discrepancy between the results of waves without reflection and with reflection in numerical modeling, compares the results of numerical modeling and the analytical ...
Izmail Kantrazhi, Alexander Gogin, Nagornova Zhanna   +2 more
doaj   +1 more source

Monte Carlo simulation of photons backscattering from various thicknesses of lead layered over concrete for energies 0.25–20 MeV using FLUKA code

Scientific Reports, 2021
There is an increased interest in determining the photon reflection coefficient for layered systems consisting of lead (Pb) and concrete. The generation of accurate reflection coefficient data has implications for many fields, especially radiation ...
Ihsan A. M. Al-Affan, Mohammad A. Z. Qutub, Richard P. Hugtenburg   +2 more
doaj   +1 more source

Coulomb Blockade Oscillations in the Thermopower of Open Quantum Dots

, 2000
We consider Coulomb blockade oscillations of thermoelectric coefficients of a single electron transistor based on a quantum dot strongly coupled to one of the leads.
A. A. M. Staring, A. Furusaki, A. Furusaki, A. S. Dzurak, A. V. Andreev, A. V. Anisovich, B. Z. Spivak, C. W. J. Beenakker, D. V. Averin, I. L. Aleiner, K. A. Matveev, K. A. Matveev, K. Flensberg, K. Flensberg, M. Cutler, S. Möller   +15 more
core   +1 more source

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez, Alejandro F. Manchón‐Gordón, Antonio Vidal‐Crespo, Rafael Caballero‐Flores, Jhon J. Ipus, Clara F. Conde   +5 more
wiley   +1 more source

Phase of the seabed frequency-domain reflection coefficient: Measurements and modelinga) [PDF]

JASA Express Letters
The phase of the seabed frequency-domain reflection coefficient potentially contains valuable information on the geoacoustic properties in a layered/refracting seabed. However, heretofore, the phase has not been exploited.
Charles W. Holland
doaj   +1 more source