Results 21 to 30 of about 330,769 (355)

Rotating detonation combustors and their similarities to rocket instabilities

open access: yesProgress in Energy and Combustion Science, 2019
Rotating detonation combustors (RDC) are at the forefront of pressure gain combustion (PGC) research, utilizing one or more azimuthally spinning detonation waves, an intrinsically unsteady process, to effect a stagnation pressure rise across the device ...
V. Anand, E. Gutmark
semanticscholar   +1 more source

Powdery Mildew Caused by Erysiphe cruciferarum on Wild Rocket (Diplotaxis tenuifolia): Hyperspectral Imaging and Machine Learning Modeling for Non-Destructive Disease Detection

open access: yesAgriculture, 2021
Wild rocket is a widely cultivated salad crop. Typical signs and symptoms of powdery mildew were observed on leaves of Diplotaxis tenuifolia, likely favored by climatic conditions occurring in a greenhouse.
C. Pane   +4 more
semanticscholar   +1 more source

1001 Rocket Launches for Space Missions and Their Infrasonic Signature

open access: yesGeophysical Research Letters, 2021
Infrasound array processing is applied to monitor and characterize atmospheric explosions in the context of the Comprehensive Nuclear‐Test‐Ban Treaty.
C. Pilger   +3 more
semanticscholar   +1 more source

Biaxial tensile test and meso damage numerical simulation of HTPB propellant

open access: yesScientific Reports, 2022
Aiming at the shortcomings of the current research on the mechanical properties of solid propellants under complex stress conditions, an effective cross-shaped test piece configuration and variable-scale biaxial tensile test method are designed in this ...
Qizhou Wang   +6 more
doaj   +1 more source

Robust adaptive beamforming based on covariance matrix reconstruction using Gauss–Legendre quadrature and steering vector estimation

open access: yesEURASIP Journal on Advances in Signal Processing, 2023
The performance of adaptive beamforming is considerably affected by system errors in the gain and phase perturbation errors, direction of arrival mismatch, and incoherent local scattering, especially when the sample data contains the signal of interest ...
Yan Lv   +4 more
doaj   +1 more source

EEG feature selection method based on maximum information coefficient and quantum particle swarm

open access: yesScientific Reports, 2023
To reduce the dimensionality of EEG features and improve classification accuracy, we propose an improved hybrid feature selection method for EEG feature selection.
Wan Chen   +4 more
doaj   +1 more source

Selenium Biofortification Effect on Glucosinolate Content of Brassica oleracea var. italic and Eruca vesicaria

open access: yesMolecules, 2023
Glucosinolates (GSLs) in different plant parts of broccoli (Brassica oleracea var. italic) and rocket (Eruca vesicaria) were analyzed qualitatively and quantitatively before and after treatment with sodium selenate (2 and 5 mM), by their desulfo ...
Azra Đulović   +3 more
doaj   +1 more source

Project of on-board control system with air-task efficiency estimation subsystem based on fuzzy logic for unmanned combat aerial vehicle rockets

open access: yesAviation, 2014
In this article, a project of on-board control system with fuzzy efficiency of air-task estimation subsystem for UCAV rockets is presented. Moreover, some features allowing the use of fuzzy logic subsystems in unmanned aviation will be described as well.
Norbert Grzesik, Michał Sobolewski
doaj   +1 more source

Foliar selenium fertilization alters the content of dietary phytochemicals in two rocket species

open access: yesFrontiers in Plant Science, 2022
Biofortification is the process that aims to enrich crops in micronutrients and valuable compounds. Selenium (Se) biofortification has particularly attracted increasing interest in recent times due to the growing number of individuals suffering from Se ...
Michela Schiavon   +3 more
doaj   +1 more source

Servo-Stabilization of Low-Frequency Oscillations in a Liquid Bipropellant Rocket Motor [PDF]

open access: yes, 1953
The recent work of H. S. Tsien concerning the servostabilization of rocket motors is extended to the liquid bipropellant rocket motor. It is shown that by use of a feedback system containing a device to sense the combustion chamber pressure, a suitably ...
Cox, Dale W., Jr., Marble, Frank E.
core   +1 more source

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