Results 81 to 90 of about 75,899 (299)
Advanced Engineering Materials, EarlyView.Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali +5 more
wiley +1 more source
Computing Instantaneous Frequency by normalizing Hilbert Transform [PDF]
, 2005 This invention presents Normalized Amplitude Hilbert Transform (NAHT) and Normalized Hilbert Transform(NHT), both of which are new methods for computing Instantaneous Frequency. This method is designed specifically to circumvent the limitation set by the
Huang, Norden E.
core +1 more source
Practical implementation of digital down conversion for wideband direction finder on FPGA [PDF]
Scientific Technical Review, 2016 Modern direction finders are designed as sensors for interception of radio signals in wider instantaneous bandwidth. Software radio technology offers ability to develop wideband direction finder architectures with programmable intermediate frequency ...
Obradović Vuk +3 more
doaj
Advanced Engineering Materials, EarlyView.Solvate ionic liquids lubrication reduced the coefficient of friction by ∼60% compared to dry sliding, reaching steady‐state values as low as 0.04–0.05. Corrosion weight‐loss measurements in 1 M HCl further demonstrated significant inhibition behavior, with only 100 ppm of [Li(G3)][TFSI] (∼68.5 μL/L) reducing corrosion‐product weight loss by 63 ...
Sameh Dabees +6 more
wiley +1 more source
Multi-component instantaneous frequency estimation using locally adaptive directional time frequency distributions [PDF]
, 2015 This paper presents a locally adaptive time-frequency (t, f) method for estimating the instantaneous frequency (IF) of multi-component signals. A high-resolution adaptive directional time-frequency distribution (ADTFD) is defined by locally adapting the ...
Boashash, Boualem +5 more
core +1 more source
Research of Instantaneous Frequency Measurement Receiver
2020 Dynamics of Systems, Mechanisms and Machines (Dynamics), 2020 В данной работе рассматривается двухканальный МИЧ-приемник с двумя линиями задержки. Проведя математическое моделирование МИЧ-приемника, были получены зависимости СКО оценки частоты от задержки при различных соотношениях С/Ш на входе. Также получена зависимость вероятности ошибочного определения зоны неоднозначности, приводящей к увеличению СКО оценки ...
M. A. Kvachev +2 more
openaire +1 more source
Stretching the Printability Metric in Direct‐Ink Writing with Highly Extensible Yield‐Stress Fluids
Advanced Functional Materials, EarlyView.This study introduces “drawability” as a new metric for assessing printability in direct‐ink writing, focusing on gap‐spanning performance and speed robustness. By designing yield‐stress fluids with high extensibility, we demonstrate that extensional strain‐to‐break significantly enhances printability.
Chaimongkol Saengow +9 more
wiley +1 more source
Compensation for Group Velocity of Polychromatic Wave Measurement in Dispersive Medium
Applied Sciences, 2017 The estimation of instantaneous frequency (IF) method is introduced to compensate for the group velocity of electromagnetic wave in dispersive medium.
Seung Jin Chang, Seung-Il Moon
doaj +1 more source
Spin Injection Of Exciton–Polaritons With Halide Perovskites At Room Temperature
Advanced Functional Materials, EarlyView.A monolithic Tamm‐plasmon microcavity embedding a two‐dimensional halide perovskite enables room‐temperature spin injection of exciton‐polaritons under quasi‐resonant optical excitation. Polarization‐resolved spectroscopy reveals partial preservation of the injected spin in the lower polariton branch, while bare excitons remain fully depolarized.
Elena Sendarrubias Arias‐Camisón +8 more
wiley +1 more source
MUSERC: Multi-Sensor Cello Recordings for Instantaneous Frequency Estimation [PDF]
, 2015 Estimating the fundamental frequency (F0) of a signal is a well studied task in audio signal processing with many applications. If the F0 varies over time, the complexity increases, and it is also more difficult to provide ground truth data for ...
Michael Müller (17016) +5 more
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