Results 31 to 40 of about 296,266 (130)

Space-Time Codes for Wireless Optical Communications

open access: yesEURASIP Journal on Advances in Signal Processing, 2002
A space-time channel coding technique is presented for overcoming turbulence-induced fading in an atmospheric optical heterodyne communication system that uses multiple transmit and receive apertures. In particular, a design criterion for minimizing the
Tarokh Vahid   +2 more
doaj   +1 more source

Statistical predictions for the dynamics of a low-speed system: Newtonian versus special-relativistic mechanics. [PDF]

open access: yesPLoS ONE, 2012
The newtonian and special-relativistic statistical predictions for the mean, standard deviation and probability density function of the position and momentum are compared for the periodically-delta-kicked particle at low speed.
Shiuan-Ni Liang, Boon Leong Lan
doaj   +1 more source

Design of a Ni-based superalloy for laser repair applications using probabilistic neural network identification

open access: yesData-Centric Engineering, 2022
A neural network framework is used to design a new Ni-based superalloy that surpasses the performance of IN718 for laser-blown-powder directed-energy-deposition repair applications.
Freddie Markanday   +8 more
doaj   +1 more source

Multidisciplinary Design Optimization of Unmanned Aerial Vehicle under Uncertainty

open access: yesJournal of Aerospace Technology and Management, 2017
Uncertainty-based multidisciplinary design optimization considers probabilistic variables and parameters and provides an approach to account for sources of uncertainty in design optimization.
Majid Hosseini   +2 more
doaj  

Relaxation of Higgs mass and cosmological constant with four-form fluxes and reheating

open access: yesJournal of High Energy Physics, 2020
We consider the most general effective action for the four-form fluxes in the Standard Model coupled to gravity. The Higgs mass parameter can be relaxed to a correct value due to the four-form coupling to the Higgs field and it stops changing due to an ...
Hyun Min Lee
doaj   +1 more source

Quantum field-theoretical descriprion of neutrino oscillations in T2K experiment [PDF]

open access: yesEPJ Web of Conferences, 2019
We consider neutrino oscillations in the T2K experiment using a new quantum field-theoretical approach to the description of processes passing at finite space-time intervals.
Egorov Vadim, Rusalev Timofei
doaj   +1 more source

Normalizing Flow-Based Probability Distribution Representation Detector for Hyperspectral Anomaly Detection

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Due to the powerful reconstruction ability, deep learning based hyperspectral anomaly detection methods have been prevalent in recent years. However, the capability of neural networks and the meaning of latent space remains unexplainable to some extent ...
Xiaorun Li   +3 more
doaj   +1 more source

Engineering criticality analysis on an offshore structure using the first- and second-order reliability method

open access: yesInternational Journal of Naval Architecture and Ocean Engineering, 2016
Due to the uncertainties related to the flaw assessment parameters, such as flaw size, fracture toughness, loading spectrum and so on, the probability concept is preferred over deterministic one in flaw assessment.
Beom-Jun Kang, Jeong-Hwan Kim, Yooil Kim
doaj   +1 more source

Doubly Quantum Mechanics [PDF]

open access: yesQuantum
Motivated by the expectation that relativistic symmetries might acquire quantum features in Quantum Gravity, we take the first steps towards a theory of ''Doubly'' Quantum Mechanics, a modification of Quantum Mechanics in which the geometrical ...
Vittorio D'Esposito   +3 more
doaj   +1 more source

Safety standards of spaces and sport equipments in girls and boys’ school at different districts of Tehran: providing suitable strategies to eliminate probable problems

open access: yesفصلنامه نوآوری‌های آموزشی, 2012
The purpose of present study was to investigate and compare safety standards of spaces and sport equipments in girls and boys’ schools at different districts of Tehran and to provide strategies to eliminate probable problems. This study was a descriptive survey. The statistical population included all sport spaces of Schools in educational districts of
Alirezā Fārsi   +2 more
openaire   +1 more source

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