Results 1 to 10 of about 426,887 (303)

Responses of annual herb plant community characteristics to increased precipitation and reduced wind velocity in semiarid sandy grassland [PDF]

open access: yesEcology and Evolution, 2019
Changes in precipitation regimes and wind velocity tend to alter structure and composition of the annual herb plant community, with consequent effects on ecological functioning and biodiversity maintenance.
Shan‐Shan Sun   +8 more
doaj   +2 more sources

Influence of wind velocity on miners’ safe working limit time in high-humidity and high-temperature environment

open access: yesMeikuang Anquan, 2022
In order to study the influence of wind velocity on the safe working limit time of miners in a humid and hot mine, five experienced mine workers were selected as subjects to exercise labor simulations with moderate intensity under 24 different mine ...
WANG Jianguo, GAI Jinmeng, WANG Jingwei
doaj   +1 more source

Polynomial Chaos Expansion-Based Enhanced Gaussian Process Regression for Wind Velocity Field Estimation from Aircraft-Derived Data

open access: yesMathematics, 2023
This paper addresses the problem of spatiotemporal wind velocity field estimation for air traffic management applications. Using data obtained from aircraft, the eastward and northward components of the wind velocity field inside a specific air space are
Marius Marinescu   +3 more
doaj   +1 more source

Retrieval of the Characteristic Size of Raindrops for Wind Sensing Based on Dual-Polarization Radar

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Wind velocity is of great importance for weather monitoring, aviation hazard alerting, wind energy exploring, etc. Doppler radar is widely used to measure wind under rainy condition by sensing the raindrops entrained by the background wind.
Yunli Peng   +5 more
doaj   +1 more source

Novel strategy for wide-range wind vector measurement using the hybrid CP/CTD heating mode and sequential measuring and correcting.

open access: yesPLoS ONE, 2021
To improve the performance of wind sensors in the high velocity range, this paper proposes a wind measurement strategy for thermal wind velocity sensors that combines the constant power and constant temperature difference driving modes of the heating ...
Tian Wang   +4 more
doaj   +1 more source

Sensitivity Investigation on the Pressure Coefficients Non-Dimensionalization

open access: yesInfrastructures, 2021
The scaling of large structures to investigate their aerodynamics in wind tunnels is a common and robust procedure to estimate important magnitudes, including pressure coefficients.
Fabio Rizzo
doaj   +1 more source

Wind Identification of Spinning Projectile Using Improved Multiobjective Differential Evolution Algorithm

open access: yesInternational Journal of Aerospace Engineering, 2022
Wind velocity has an important influence on the ballistic characteristics of uncontrolled projectiles. It is difficult to precisely determine the projectile’s impact position if wind velocity information from the projectile’s flight process cannot be ...
Dingye Zhang   +4 more
doaj   +1 more source

Study on the Elimination Method of Wind Field Influence in Retrieving a Sea Surface Current Field

open access: yesSensors, 2022
An along-the-track interferometric synthetic aperture radar (ATI-SAR) system can estimate the radial velocity of a moving target on the ground and on a sea surface current.
Xinzhe Yuan   +3 more
doaj   +1 more source

An approach to minimize aircraft motion bias in multi-hole probe wind measurements made by small unmanned aerial systems [PDF]

open access: yesAtmospheric Measurement Techniques, 2021
A multi-hole probe mounted on an aircraft provides the air velocity vector relative to the aircraft, requiring knowledge of the aircraft spatial orientation (e.g., Euler angles), translational velocity and angular velocity to translate this information
L. Al-Ghussain, S. C. C. Bailey
doaj   +1 more source

Numerical modeling of atmospheric pollution in the approaches of random selection of discrete dusting sites and interval distribution of dust size

open access: yesVestnik MGTU, 2022
The results of numerical simulation of atmospheric pollution in Apatity are presented with variations in the dusting area of discrete spatially spaced areas selected randomly and the wind flow velocity.
Amosov P. V.   +3 more
doaj   +1 more source

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