Results 11 to 20 of about 9,504 (229)

Dual-Channel Rolling Bearing Fault Diagnosis Method Based on ACNN-LFSwin Transformer [PDF]

Jisuanji gongcheng
Rolling bearings are components commonly used in mechanical equipment. Traditional methods struggle to classify signals with numerous complex features in a multi-noise environment.
HUO Jiuyuan, LI Xin, CHANG Chen, ZHANG Yaonan
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Multi-decadal patterns of vegetation succession after tundra fire on the Yukon-Kuskokwim Delta, Alaska

Environmental Research Letters, 2020
Alaska’s Yukon-Kuskokwim Delta (YKD) is one of the warmest parts of the Arctic tundra biome and tundra fires are common in its upland areas. Here, we combine field measurements, Landsat observations, and quantitative cover maps for tundra plant ...
Gerald V Frost, Rachel A Loehman, Lisa B Saperstein, Matthew J Macander, Peter R Nelson, David P Paradis, Susan M Natali   +6 more
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20 years of change in tundra NDVI from coupled field and satellite observations

Environmental Research Letters, 2023
In 2022 we resampled normalized difference vegetation index (NDVI) along a 100 m transect in tundra near Utqiagvik, AK that had been previously measured through the 2000–2002 growing seasons, providing an opportunity to examine a 20 year NDVI change at a
K Fred Huemmrich, John Gamon, Petya Campbell, Marianna Mora, Sergio Vargas Z, Brenda Almanza, Craig Tweedie   +6 more
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Multi-Sensor Analysis of Snow Seasonality and a Preliminary Assessment of SAR Backscatter Sensitivity to Arctic Vegetation: Limits and Capabilities

Remote Sensing, 2022
Snow melt timing and the last day of snow cover have a significant impact on vegetation phenology in the Svalbard archipelago. The aim of this study is to assess the seasonal variations of the snow using a multi-sensor approach and to analyze the ...
Laura Stendardi, Stein Rune Karlsen, Eirik Malnes, Lennart Nilsen, Hans Tømmervik, Elisabeth J. Cooper, Claudia Notarnicola   +6 more
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Relationship of cyanobacterial and algal assemblages with vegetation in the high Arctic tundra (West Spitsbergen, Svalbard Archipelago)

Polish Polar Research, 2015
The paper presents the results of a study of cyanobacteria and green algae assemblages occurring in various tundra types determined on the basis of mosses and vascular plants and habitat conditions. The research was carried out during summer in the years
Richter Dorota, Pietryka Mirosława, Matuła Jan   +2 more
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Increases in graminoids after three decades of change in the High Arctic

Polar Research, 2023
Climate change portends serious implications for Arctic vegetation. Understanding these effects is likely to be enhanced with long-term observations from permanent plots. I evaluated three decades of change in tundra vegetation from 80 permanent plots on
James A. Schaefer
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Effects of multiple environmental variables on tundra ecosystem respiration in maritime Antarctica

Scientific Reports, 2018
Summertime ecosystem respiration (ER) rates through seven sites were measured at an upland tundra on Fildes Peninsula in maritime Antarctica to investigate effects of topographic gradient, vegetation types and climatic factors on tundra ER rates. Overall
Tao Bao, Renbin Zhu, Xianglan Li, Wenjuan Ye, Xiao Cheng   +4 more
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Impacts of active retrogressive thaw slumps on vegetation, soil, and net ecosystem exchange of carbon dioxide in the Canadian High Arctic

Arctic Science, 2017
Retrogressive thaw slumps (RTS) are permafrost disturbances common on the Fosheim Peninsula, Ellesmere Island, Canada. During the 2013 growing season, three different RTS were studied to investigate the impact on vegetation composition, soil, and growing
Alison E. Cassidy, Andreas Christen, Greg H.R. Henry   +2 more
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Differential arthropod responses to warming are altering the structure of Arctic communities [PDF]

Royal Society Open Science, 2018
The Arctic is experiencing some of the fastest rates of warming on the planet. Although many studies have documented responses to such warming by individual species, the idiosyncratic nature of these findings has prevented us from extrapolating them to ...
Amanda M. Koltz, Niels M. Schmidt, Toke T. Høye   +2 more
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Greening on the Bathurst caribou range in northern Canada: are erect shrubs responsible for remotely sensed trends?

Arctic Science, 2023
Remote sensing has detected recent trends of increased vegetation productivity on the Bathurst caribou herd’s range. The cause of this spectral greening is unknown but is hypothesized to be the result of a change in the composition, establishment ...
Carolyn Bonta, Gregory M. King, Ryan K. Danby   +2 more
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