Results 11 to 20 of about 720,181 (274)

RF-MEMS switches for reconfigurable antennas [PDF]

open access: yes, 2011
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Reconfigurable antennas are attractive for many military and commercial applications where it is required to have a single antenna that can be dynamically ...
Spasos, Michail N
core   +6 more sources

Evaluation of four bias correction methods and random forest model for climate change projection in the Mara River Basin, East Africa

open access: yesJournal of Water and Climate Change, 2022
This study evaluates the performance of four bias correction methods based on CORDEX (coordinated regional climate downscaling experiment) domain six regional climate models (RCMs) at the Mara River Basin. A suitable bias correction method was considered
Priyanko das, Zhenke Zhang, Hang Ren
doaj   +1 more source

The effects of field emitted electrons on RF surfaces [PDF]

open access: yes, 2009
The ever-growing demand for higher RF gradients has considerably increased the risk of breakdown in accelerating structures. Field emission is the most common form of RF breakdown that generates free electrons capable of inflicting irreversible ...
Ristic, M.   +6 more
core   +3 more sources

ارزیابی یادگیری ماشین و سنجش از دور در تخمین تبخیر و تعرق مرجع [PDF]

open access: yesمدیریت آب و آبیاری
تبخیر و تعرق مرجع (ETo) یکی از اساسی‌ترین متغیرها در تعیین نیاز آبی محصول و برنامه‌ریزی و طراحی سامانه‌های آبیاری است. مدل‌های یادگیری ماشین برای رفع محدودیت‌های مدل‌های تجربی و برآورد تبخیر تعرق (ET) توسعه داده‌ شده‌اند.
جوانشیر عزیزی مبصر   +2 more
doaj   +1 more source

Spatiotemporal modeling of CO pollutant in city of Isfahan using MODIS imagery and ANFIS and RF algorithms [PDF]

open access: yesعلوم محیطی, 2022
Introduction: Industrialization, urbanization, and population growth are considered as the main causes of urban air pollution that is responsible for millions of deaths per year worldwide.
Soolmaz Shamsaie   +2 more
doaj   +1 more source

RF and Surface Properties of Superconducting Samples [PDF]

open access: yes, 2011
The surface resistance Rs of superconducting cavities can be obtained from the unloaded quality factor Q0. Since Rs varies strongly over the cavity surface its value must be interpreted as averaged over the whole cavity surface.
Weingarten, W.   +3 more
core   +3 more sources

Wheat Lodging Area Recognition Method Based on Different Resolution UAV Multispectral Remote Sensing Images

open access: yes智慧农业, 2023
ObjectiveTo quickly and accurately assess the situation of crop lodging disasters, it is necessary to promptly obtain information such as the location and area of the lodging occurrences.
WEI Yongkang   +8 more
doaj   +1 more source

Basic models and approximation for the engineering description of the kinetics of the oxide layer of steel in a flow of heavy liquid metal coolant under various oxygen conditions [PDF]

open access: yesNuclear Energy and Technology, 2020
The article presents the results of corrosion processes, kinetics and changes in the oxide layer modeling using MASKA-LM software complex. The complex is intended for a numerical simulation of three-dimensional non-stationary processes of mass transfer ...
Alexandr V. Avdeenkov   +4 more
doaj   +3 more sources

Simulating Snow Cover Extent by Combined Principal Component Analysis and Artificial Intelligence Approaches Using Climatic Parameters [PDF]

open access: yesWater Harvesting Research, 2022
Snow cover holds significant importance in hydrology as it plays a vital role in the water cycle and water resource management. Acting as a natural reservoir, snow stores water during winter and gradually releases it as it melts. This process contributes
Amin Amini Rakan   +3 more
doaj   +1 more source

Development of an RF IV waveform based stress test procedure for use on GaN HFETs [PDF]

open access: yes, 2012
This paper reports on the development of an RF IV waveform based stress test procedure. DC and low-voltage RF characterisation was carried out before and after high power RF stress.
Tasker, Paul J.   +3 more
core   +1 more source

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