Results 41 to 50 of about 607,497 (167)

Complete Fourier Direct Magnetic Resonance Imaging (CFD-MRI) for Diffusion MRI

open access: yesFrontiers in Integrative Neuroscience, 2013
The foundation for an accurate and unifying Fourier based theory of diffusion weighted magnetic resonance imaging (DW-MRI) is constructed by carefully re-examining the first principles of DW-MRI signal formation and deriving its mathematical model from ...
Alpay eÖzcan
doaj   +1 more source

Analysis of the Annual Wave Characteristics in the Deep Water Area near the East Coast of Guangdong Province

open access: yes南方能源建设, 2020
[Introduction] According to the measured wave data of one year in the deep water area of Eastern Guangdong, this paper mainly studies the basic characteristics of annual waves in the sea area.
PAN Dongdong   +3 more
doaj   +1 more source

SPECIFICS AND FUNCTIONS OF MYTH DESIGN IN CONTEMPORARY PR-DISCOURSE

open access: yesPolylinguality and Transcultural Practices, 2016
The article deals with the cognitive structure of PR-discourse, which is characterized by its coordinates in the functioning of the process of symbolization and mythologizing that the most representative in the production of image and brand.
D A Kaziyeva
doaj  

Positive quantum joint distributions

open access: yesJournal of Mathematical Physics, 1980
We demonstrate the existence of positive phase space density functions which yield the quantum mechanical marginal distributions of position and momentum.
Cohen L., Zaparovanny Y.I.
openaire   +2 more sources

Modeling Asymmetric Dependence Structure of Air Pollution Characteristics: A Vine Copula Approach

open access: yesMathematics
Contaminated air is unhealthy for people to breathe and live in. To maintain the sustainability of clean air, air pollution must be analyzed and controlled, especially after unhealthy events.
Mohd Sabri Ismail   +3 more
doaj   +1 more source

Joint modeling of flood peak discharges, volume and duration: a case study of the Danube River in Bratislava

open access: yesJournal of Hydrology and Hydromechanics, 2014
The study is focused on the analysis and statistical evaluation of the joint probability of the occurrence of hydrological variables such as peak discharge (Q), volume (V) and duration (t).
Bačová Mitková Veronika   +1 more
doaj   +1 more source

Cold Chain Logistics and Joint Distribution: A Review of Fresh Logistics Modes

open access: yesSystems
With the continuous development of the global logistics industry, cold chain transportation and joint distribution, as critical strategies in supply chain management, are gradually becoming key means to ensure the safe transportation of perishable goods,
Huaixia Shi, Qinglei Zhang, Jiyun Qin
doaj   +1 more source

On the Joint Distribution of Excursion Duration and Amplitude of a Narrow-Band Gaussian Process

open access: yesIEEE Access, 2018
The probability density of crest amplitude and duration that exceeds a given level is used in many theoretical and practical problems in engineering that are subjected to fluctuating loads such as wind and wave loads.
Mahdi Ghane   +3 more
doaj   +1 more source

A modified two-stage isolated bidirectional buck-DAB converter with a full-load ZVS range

open access: yesFrontiers in Energy Research
A modified two-stage buck-DAB (MBDAB) converter is proposed to improve the performance of the traditional two-stage buck-DAB (TSBDAB) converter. In the MBDAB converter, the DAB can work with fixed voltage gain and voltage-matched condition under a wide ...
Jinliang Li   +5 more
doaj   +1 more source

Construction of Joint Probability Distributions

open access: yesThe Annals of Mathematical Statistics, 1968
Let Fi(x) and F2(y) be the distribution functions of two random variables. Frechet proved that the family of joint distributions having Fi(x) and F2(y) as marginal distributions collapses to F1(x)F2(y) if and only if either F,(x) or F2(y) is a unit step function.
openaire   +2 more sources

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