Results 1 to 10 of about 9,390,253 (340)

Characterizing the luminescent properties of upconversion nanoparticles in single and densely packed state [PDF]

open access: yesJournal of Innovative Optical Health Sciences, 2019
Luminescent properties of Er3+- and Yb3+- co-doped CaF2 upconversion nanoparticles (UCNPs) were investigated in single particle and densely-packed states with a custom-built microscope.
Xiaohu Chen   +9 more
doaj   +1 more source

Non-analytic behaviour in large-deviations of the susceptible-infected-recovered model under the influence of lockdowns

open access: yesNew Journal of Physics, 2023
We numerically investigate the dynamics of an SIR model with infection level-based lockdowns on Small-World networks. Using a large-deviation approach, namely the Wang–Landau algorithm, we study the distribution of the cumulative fraction of infected ...
Leo Patrick Mulholland   +2 more
doaj   +1 more source

Improving lung function in adolescents with CF by tracking annual rate of lung function decline

open access: yesBMJ Open Quality, 2021
Background For patients with cystic fibrosis (CF), sustaining lung function through the adolescent years is crucial to slow the progressive decline that leads to significant morbidity and early mortality.
Sydney Schiff   +2 more
doaj   +1 more source

Association between resting heart rate and pulmonary function in adult men [PDF]

open access: yesJournal of Men's Health, 2023
Elevated resting heart rate (RHR) is known to be associated with increased mortality in patients with chronic obstructive pulmonary disease (COPD) whose pulmonary function is reduced. On the other hand, no study has reported on the association between
Seol-Jung Kang   +4 more
doaj   +1 more source

Thyroid function and age-related decline in kidney function in older Chinese adults: a cross-sectional study

open access: yesBMC Geriatrics, 2022
Background Thyroid function may be a factor affecting kidney function in the general population. Kidney and thyroid function vary with age; therefore, the association between thyroid function and decreased kidney function in older adults may be different
Lu Wei   +6 more
doaj   +1 more source

Distortion-Rate Function of Sub-Nyquist Sampled Gaussian Sources [PDF]

open access: yes, 2015
The amount of information lost in sub-Nyquist sampling of a continuous-time Gaussian stationary process is quantified. We consider a combined source coding and sub-Nyquist reconstruction problem in which the input to the encoder is a noisy sub-Nyquist ...
Eldar, Yonina C.   +3 more
core   +1 more source

Rate Distortion Functions and Rate Distortion Function Lower Bounds for Real-World Sources

open access: yesEntropy, 2017
Although Shannon introduced the concept of a rate distortion function in 1948, only in the last decade has the methodology for developing rate distortion function lower bounds for real-world sources been established.
Jerry Gibson
doaj   +1 more source

Automatic Focusing Method with Variable Threshold and Variable Step Based on Function Change Rate [PDF]

open access: yesJisuanji gongcheng, 2016
In order to achieve fast and accurate autofocus and reduce the effect of reverse backlash on autofocus,by using variable step and subsection control,an automatic focusing strategy is proposed in this paper.Through reducing the number of reverse motion ...
ZHANG Jinfeng,ZHANG Jiye
doaj   +1 more source

Variable-rate source coding theorems for stationary nonergodic sources [PDF]

open access: yes, 1994
For a stationary ergodic source, the source coding theorem and its converse imply that the optimal performance theoretically achievable by a fixed-rate or variable-rate block quantizer is equal to the distortion-rate function, which is defined as the ...
Chou, P. A., Effros, M., Gray, R. M.
core   +2 more sources

Efficient Computation of the Quantum Rate-Distortion Function [PDF]

open access: yesQuantum
The quantum rate-distortion function plays a fundamental role in quantum information theory, however there is currently no practical algorithm which can efficiently compute this function to high accuracy for moderate channel dimensions. In this paper, we
Kerry He, James Saunderson, Hamza Fawzi
doaj   +1 more source

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