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As a star runs out of fuel, it will billow out to a million times its original size, engulfing any matter — and planets — in its wake. Scientists have observed hints of stars just before, and shortly ...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Estimating Factor-Based Spot Volatility Matrices with Noisy and Asynchronous High-Frequency Data
噪声 异步高频 数据估算 因子 现货波动率 矩阵
2023/5/4
With noisy and asynchronous high-frequency data collected for an ultra-large number of assets, we estimate high-dimensional spot volatility matrices satisfying a low-rank plus sparse structure. A loca...
WETLAND CLASSIFICATION FOR BLACK DUCK HABITAT MANAGEMENT USING COMBINED POLARIMETRIC RADARSAT 2 AND SPOT IMAGERY
Wetlands Synthetic Aperture Radar Polarimetric data Decomposition Classification
2018/5/16
The black duck population has decreased significantly due to loss of its breeding habitat. Wetlands are an important feature that relates to habitat management and requires monitoring. Synthetic Apert...
Aerial drones deliver sweet spot for HAB research at VIMS（图）
aerial drones sweet spot hab research vims
2017/9/19
Harmful algal blooms or HABs are notoriously difficult to sample. They can appear abruptly when growing conditions are right, and disappear just as quickly when conditions deteriorate. They also shift...
Through analysis of volcanic tracks, Rice University geophysicists have concluded that hot spots like those that formed the Hawaiian Islands aren’t moving as fast as recently thought.Hot spots are are...
A cosmic barbecue:Researchers spot 60 new ‘hot Jupiter’ candidates
A cosmic barbecue Researchers 60 new hot Jupiter candidates
2017/7/24
Yale researchers have identified 60 potential new “hot Jupiters” — highly irradiated worlds that glow like coals on a barbecue grill and are found orbiting only 1% of Sun-like stars.Hot Jupiters const...
A Wave’s “Sweet Spot” Revealed
A Wave Sweet Spot
2017/7/24
For surfers, finding the “sweet spot,” the most powerful part of the wave, is part of the thrill and the challenge.Nick Pizzo, a Scripps Institution of Oceanography at the University of California pos...
Sensitivity Analysis of Spectral Indices to Ozone Absorption Using Physical Simulations in a Forest Environment: Comparative Study between MODIS, SPOT VéGéTATION & AVHRR
Spectral Indices Ozone Absorption Using Physical Simulations
2015/7/29
Considering a forest cover (Balsam Fir with various densities) we analyze the sensitivity of several vegetation indices to
ozone absorption using physical simulations in the spectral bands of MODIS,...
The Cold War and a Test of the Hawaiian Hot Spot Hypothesis
Cold War Hawaiian Hot Spot Hypothesis
2015/7/24
Having just retired from teaching at Moss Landing Marine Laboratories, I have been reflecting upon my life, both in teaching and as a researcher at the U.S. Geological Survey (USGS), and without a dou...
Validation of spectral continuity between PROBA-V and SPOT-VEGETATION global daily datasets
PROBA-V Global Daily
2015/5/7
Spectral consistency with SPOT-VEGETATION is an important mission objective for PROBA-V, in particular for its 1 km products. This must allow service providers such as the Copernicus Global Land Ser...
amounts of erupting lava are connected to the destruction of supercontinents and dramatic changes in climate and ecosystems.
New research from UC Davis and Aarhus University in Denmark shows that hig...
New research from UC Davis and Aarhus University in Denmark shows that high mantle temperatures miles beneath the Earth’s surface are essential for generating such large amounts of magma. In fact, the...
COLUMBUS, Ohio—Our view of other solar systems just got a little more familiar, with the discovery of a planet 25,000 light-years away that resembles our own Uranus.
2013年7月12日，SPOT-6卫星数据处理系统与在中科院遥感与数字地球研究所完成系统安装并通过验收测试。
Petit-spot lava fields off the central Chile trench induced by plate flexure
hpetit-spot Chile trench alkali-basalt Nazca plate Juan Fernández hotspot
2017/4/11
In 2009, petit-spot submarine volcanoes were discovered off the oceanward slope of the central Chile trench, offshore
from Valparaiso, Chile, at around 33°S. Ar–Ar dating of mugearite and alkali-basa...