Results 1 to 10 of about 104,267 (145)

EXPLORING CORTICAL BONE DENSITY THROUGH THE ULTRASOUND INTEGRATED REFLECTION COEFFICIENT [PDF]

open access: yesActa Ortopédica Brasileira, 2018
Objective: This work evaluates the relationship between ultrasonic reflection and bone density from fourteen cylindrical bovine cortical bone samples (3.0-cm thick).
Daniel Patterson Matusin   +6 more
doaj   +3 more sources

An Antenna Proximity Sensor for Mobile Terminals Using Reflection Coefficient [PDF]

open access: yesSensors, 2018
This paper presents a new antenna proximity sensor for mobile terminals based on the measured reflection coefficient using a bidirectional coupler which is positioned between the main antenna and the front-end module.
Wonsub Lim, Dongil Yang, Youngoo Yang
doaj   +2 more sources

Research on the law of reflection coefficient of reflective film of traffic sign based on Angle [PDF]

open access: yesMATEC Web of Conferences, 2022
In this paper, a large number of digital printing reflective film retroreflectivity measurement. Based on the multi-angle test of the reflective film of the mainstream manufacturers in the market, the reverse reflection coefficient of the digital ...
Meng Yu   +6 more
doaj   +1 more source

STUDY OF REFLECTION COEFFICIENT DISTRIBUTION FOR ANTI-REFLECTION COATINGS ON SMALL-RADIUS OPTICAL PARTS [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2015
The paper deals with findings for the energy reflection coefficient distribution of anti- reflection coating along the surface of optical elements with a very small radius (2-12 mm).
L. A. Gubanova, H. L. Thang, T. D. Tan
doaj   +1 more source

Metamaterial Design with Nested-CNN and Prediction Improvement with Imputation

open access: yesApplied Sciences, 2022
Metamaterials, which are not found in nature, are used to increase the performance of antennas with their extraordinary electromagnetic properties.
Erkan Kıymık, Ergun Erçelebi
doaj   +1 more source

Reflection Coefficient Stability Criterion for Multi-Bus Multi-VSC Power Systems

open access: yesIEEE Access, 2020
This paper proposes a reflection coefficient stability criterion for multi-bus power systems with multiple voltage-source converters (VSCs). In the method, VSCs are modeled as two-port networks, which are then characterized by the incident and reflected ...
Shih-Feng Chou   +2 more
doaj   +1 more source

Research on reflection characteristics of the terahertz channel for 6G

open access: yesTongxin xuebao, 2022
The reflection characteristics of the terahertz channel are crucial for understanding and mastering the propagation mechanism of the terahertz channel, which are also required for a high-precision terahertz channel model for 6G.Therefore, the research ...
Pan TANG   +6 more
doaj   +2 more sources

Generalized Reflection Coefficients [PDF]

open access: yesCommunications in Mathematical Physics, 2015
I consider general reflection coefficients for arbitrary one-dimensional whole line differential or difference operators of order $2$. These reflection coefficients are semicontinuous functions of the operator: their absolute value can only go down when limits are taken.
openaire   +2 more sources

P138 Modelling and Simulation of Pressure Re-reflections at the Aortic Valve Using Difference Equations

open access: yesArtery Research, 2020
Introduction The concept of re-reflections of blood pressure waves at the heart has been neglected in most models and is only poorly understood so far.
Bernhard Hametner   +2 more
doaj   +2 more sources

Robust state controller via reflection coefficient assignment; pp. 38–47 [PDF]

open access: yesProceedings of the Estonian Academy of Sciences, 2011
A solution to the robust pole assignment problem via reflection coefficients of polynomials is provided for discrete-time single-input single-output (SISO) and multi-input multi-output (MIMO) linear systems. For SISO systems a robust state controller and
Ülo Nurges
doaj   +1 more source

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