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10 years later: What did scientists learn from the Deepwater Horizon oil spill?（图）
10 years later scientists Deepwater Horizon oil spill
2020/4/29
10 years later: What did scientists learn from the Deepwater Horizon oil spill?
Zoom media briefing:The Event Horizon Telescope, a year after capturing the image of a black hole（图）
Zoom media briefing Event Horizon Telescope year after capturing the image black hole
2020/4/10
Media are invited to join an April 10 Zoom media briefing with Sheperd S. Doeleman, founding director of the Event Horizon Telescope (EHT), and astrophysicist Michael Johnson to discuss the one-year a...
This week heralds an exciting and challenging endeavor for astronomy. The Event Horizon Telescope will seek to capture a first-ever image of the supermassive black hole at the center of the Milky Way,...
Event Horizon Telescope Reveals Magnetic Fields at Milky Way's Central Black Hole
Telescope Magnetic Fields Milky Way Central Black Hole
2015/12/14
Most people think of black holes as giant vacuum cleaners sucking in everything that gets too close. But the supermassive black holes at the centers of galaxies are more like cosmic engines, convertin...
ANOMALOUS CURRENT IN PERIODIC LORENTZ GASES WITH INFINITE HORIZON
PERIODIC LORENTZ GASES INFINITE HORIZON
2015/9/29
We study electrical current in two-dimensional periodic Lorentz gas in the presence of a weak homogeneous etric field.When the horizon is finite, i.e. the free flights between
colli...
Shrinking-horizon dynamic programming
dynamic programming model predictive control revenue management
2015/8/7
We describe a heuristic control policy, for a general finite-horizon stochastic control problem, that can be used when the current process disturbance is not conditionally independent of previous dist...
Moving horizon estimation for staged QP problems
Moving horizon estimation quadratic programming the structure the kalman filter linear system numerical values
2015/8/7
This paper considers moving horizon estimation (MHE) approach to solution of staged quadratic programming (QP) problems. Using an insight into the constrained solution structure for the growing horizo...
Detection of Floating Oil Anomalies from the Deepwater Horizon Oil Spill with Synthetic Aperture Radar
Floating Oil Anomalies Deepwater Horizon Oil Spill Synthetic Aperture Radar
2015/7/16
Detection of oil floating on the ocean surface, and particularly thick layers of it, is crucial for emergency response to oil spills. While detection of oil on the ocean surface is possible under mode...
A control law is constructed for a linear time varying system by solving a two player zero sum differential game on a moving horizon, the game being that which is used to construct an H-infinity contr...
Riccati Differential Inequalities: Suboptimal H-infinity Controllers for Finite Horizon Time-Varying Systems
Riccati Differential Inequalities Suboptimal H-infinity
2015/6/19
In this paper we give a direct derivation of the solution to the continuous time finite horizon H-infinity synthesis problem. An explicit separation of the time domain cost function into past and futu...
Robust Performance and Adaptation Using Receding Horizon H-infinity Control of Time Varying Systems
Receding Horizon H-infinity Control Time Varying Systems
2015/6/19
In this paper we construct suboptimal H-infinity controllers which satisfy a new robust performance condition, using the receding horizon technique. A method is described for the synthesis of H-infini...
The following is part 15 in a series on the National Science Foundation's (NSF) Environmental Research and Education (ERE) programs.Parts one, two, three, four, five, six...
Study details impact of Deepwater Horizon oil spill on beach microbial communities
Deepwater Horizon oil spill beach microbial communities
2015/3/4
Once the lightest fractions of the oil had been consumed, the organisms that had been digesting those compounds declined, replaced by others able to chew up the remaining heavier materials. Ultimately...
Where did the Deepwater Horizon oil go? To Davy Jones' Locker at the bottom of the sea（图）
sea The deepwater horizon
2014/12/1
Where's the remaining oil from the 2010 Deepwater Horizon disaster in the Gulf of Mexico?
The location of 2 million barrels of oil thought to be trapped in the deep ocean has remained a mystery. Unti...
Where did the Deepwater Horizon oil go? To Davy Jones' Locker at the bottom of the sea
oil Davy Jones ocean
2014/10/30
The location of 2 million barrels of oil thought to be trapped in the deep ocean has remained a mystery. Until now.
Scientist David Valentine of the University of California, Santa Barbara (UCSB) and...