Results 11 to 20 of about 8,668,074 (299)

Multi-Point Seawall Settlement Prediction with Limited Data Volume Using an Improved Fractional-Order Grey Model

Fractal and Fractional
Settlement prediction based on monitoring data holds significant importance for engineering maintenance of seawalls. In practical engineering, the volume of the collected monitoring data is often limited due to the restrictions of devices and engineering
Peng Qin, Chunmei Cheng, Zhenzhu Meng, Chunmei Ding, Sen Zheng, Huaizhi Su   +5 more
doaj   +2 more sources

Fractional calculus of periodic distributions [PDF]

, 2011
Two approaches for defining fractional derivatives of periodic distributions are presented. The first is a distributional version of the Weyl fractional derivative in which a derivative of arbitrary order of a periodic distribution is defined via Fourier
Lamb, Wilson, Khaula N. Khan, Khan, Khaula Naeem, Mcbride, Adam, Adam C. McBride, Wilson Lamb   +5 more
core   +3 more sources

Radar matched filtering using the fractional fourier transform [PDF]

, 2010
-A matched filter is the optimal linear filter for maximizing the signal to noise ratio (SNR) in the presence of additive noise. Matched filters are commonly used in radar systems where the transmitted signal is known and may be used as a replica to be ...
Clemente, Carmine, Elgamel, Sherif A.E.H., Soraghan, J.J.   +2 more
core   +4 more sources

Fractional transformations of generalised functions [PDF]

, 2009
A distributional theory of fractional transformations is developed. A constructive approach, based on the eigenfunction expansion method pioneered by A. H.
Lamb, Wilson, Khan, Khaula Naeem, McBride, Adam C.   +2 more
core   +4 more sources

White matter abnormalities and structural hippocampal disconnections in amnestic mild cognitive impairment and Alzheimer's disease. [PDF]

PLoS ONE, 2013
The purpose of this project was to evaluate white matter degeneration and its impact on hippocampal structural connectivity in patients with amnestic mild cognitive impairment, non-amnestic mild cognitive impairment and Alzheimer's disease.
Jared Rowley, Vladimir Fonov, Ona Wu, Simon Fristed Eskildsen, Dorothee Schoemaker, Liyong Wu, Sara Mohades, Monica Shin, Viviane Sziklas, Laksanun Cheewakriengkrai, Amir Shmuel, Alain Dagher, Serge Gauthier, Pedro Rosa-Neto, Alzheimer's Disease Neuroimaging Initiative   +14 more
doaj   +1 more source

Infant mortality rates: Time trends and fractional integration [PDF]

, 2011
This paper examines the time trends in infant mortality rates in a number of countries in the 20th century. Rather than imposing that the error term is a stationary I(0) process, we allow for the possibility of fractional integration and hence for a much
Caporale, GM, Gil-Alana, LA
core   +6 more sources

Set-up error and CTV margin in one-week ultra-hypofractionated whole breast irradiation after breast-conserving surgery based on daily CBCT [PDF]

Zhongguo aizheng zazhi
Background and purpose: Single-week ultra-hypofractionated whole breast irradiation (WBI) after breast-conserving surgery could shorten the treatment duration while ensuring efficacy and safety, making it a viable option for WBI.
WANG Mengxiao, FAN Wendong, CAO Jingjing, CHEN Jiayi, CAI Gang, CAO Lu
doaj   +3 more sources

Fetal weight estimation by automated three-dimensional limb volume model in late third trimester compared to two-dimensional model: a cross-sectional prospective observational study

BMC Pregnancy and Childbirth, 2021
Background Accurate estimation of fetal weight is important for prenatal care and for detection of fetal growth abnormalities. Prediction of fetal weight entails the indirect measurement of fetal biometry by ultrasound that is then introduced into ...
Xining Wu, Zihan Niu, Zhonghui Xu, Yuxin Jiang, Yixiu Zhang, Hua Meng, Yunshu Ouyang   +6 more
doaj   +1 more source

Non-singular fractional approach for natural convection nanofluid with Damped thermal analysis and radiation

Case Studies in Thermal Engineering, 2021
The studies of ordinary derivatives based nanofluids have limitations and some restrictions to solve and analyze the integer ordered leading partial differential equations and also have some memory effect complications. Fractional order in nanofluids can
Ali Raza, Ilyas Khan, Saadia Farid, Chu Anh My, Afrasyab Khan, Hammad Alotaibi   +5 more
doaj   +1 more source

ACCURACY OF ESTIMATES OF VOLUME FRACTION

Image Analysis & Stereology, 2011
When estimating a volume fraction VV from point count fractions PP using Delesse's principle VV = PP, very little information on the accuracy of the estimator can be obtained from the basic theory of stereology. Existing methods for quantifying the variability of PP are mainly large-sample approximations such as Cochran's formula for the variance of a ...
Baddeley, Adrian, Chia, Joanne
openaire   +5 more sources