Results 21 to 30 of about 4,461,069 (318)

Flow-Cut Gaps for Integer and Fractional Multiflows [PDF]

open access: yesProceedings of the Twenty-First Annual ACM-SIAM Symposium on Discrete Algorithms, 2010
24 pages, 10 figures. Results presented first at the Symposium on Discrete Algorithms (SoDA 2010)
Chekuri, Chandra   +2 more
openaire   +2 more sources

Joint Use of PROSAIL and DART for Fast LUT Building: Application to Gap Fraction and Leaf Biochemistry Estimations over Sparse Oak Stands

open access: yesRemote Sensing, 2020
Gap Fraction, leaf pigment contents (content of chlorophylls a and b (Cab) and carotenoids content (Car)), Leaf Mass per Area (LMA), and Equivalent Water Thickness (EWT) are considered relevant indicators of forests’ health status, influencing many ...
T. Miraglio   +4 more
semanticscholar   +1 more source

Retrieving Forest Canopy Elements Clumping Index Using ICESat GLAS Lidar Data

open access: yesRemote Sensing, 2021
Clumping index (CI) is a canopy structural variable important for modeling the terrestrial biosphere, but its retrieval from remote sensing data remains one of the least reliable.
Lei Cui   +11 more
doaj   +1 more source

Estimating Effective Leaf Area Index of Winter Wheat Using Simulated Observation on Unmanned Aerial Vehicle-Based Point Cloud Data

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Within-field variation of leaf area index (LAI) plays an essential role in field crop monitoring and yield forecasting. Although unmanned aerial vehicle (UAV)-based optical remote sensing method can overcome the spatial and temporal resolution ...
Yang Song, Jinfei Wang, Jiali Shang
doaj   +1 more source

Retrieving Leaf Area Index (LAI) Using Remote Sensing: Theories, Methods and Sensors

open access: yesSensors, 2009
The ability to accurately and rapidly acquire leaf area index (LAI) is an indispensable component of process-based ecological research facilitating the understanding of gas-vegetation exchange phenomenon at an array of spatial scales from the leaf to the
Guang Zheng, L. Monika Moskal
doaj   +1 more source

Direct Estimation of Forest Leaf Area Index based on Spectrally Corrected Airborne LiDAR Pulse Penetration Ratio

open access: yesRemote Sensing, 2020
The leaf area index (LAI) is a crucial structural parameter of forest canopies. Light Detection and Ranging (LiDAR) provides an alternative to passive optical sensors in the estimation of LAI from remotely sensed data. However, LiDAR-based LAI estimation
Yonghua Qu   +6 more
doaj   +1 more source

Hard Colour Singlet Exchange at the Tevatron [PDF]

open access: yes, 1999
We have performed a detailed phenomenological investigation of the hard colour singlet exchange process which is observed at the Tevatron in events which have a large rapidity gap between outgoing jets.
Cox, Brian   +2 more
core   +5 more sources

The Gap to Fill: Rationale for Rapid Initiation and Optimal Titration of Comprehensive Disease-modifying Medical Therapy for Heart Failure with Reduced Ejection Fraction

open access: yesCardiac failure review, 2021
There are gaps in the use of therapies that save lives and improve quality of life for patients with heart failure with reduced ejection fraction, both in the US and abroad.
Nicholas K Brownell   +2 more
semanticscholar   +1 more source

Superconductivity coexisting with phase-separated static magnetic order in (Ba,K)Fe$_{2}$As$_{2}$, (Sr,Na)Fe$_{2}$As$_{2}$ and CaFe$_{2}$As$_{2}$ [PDF]

open access: yes, 2008
The recent discovery and subsequent developments of FeAs-based superconductors have presented novel challenges and opportunities in the quest for superconducting mechanisms in correlated-electron systems.
Aczel, A. A.   +24 more
core   +3 more sources

Fundamental gaps of the fractional Schrödinger operator

open access: yesCommunications in Mathematical Sciences, 2019
We study asymptotically and numerically the fundamental gap -- the difference between the first two smallest (and distinct) eigenvalues -- of the fractional Schr dinger operator (FSO) and formulate a gap conjecture on the fundamental gap of the FSO.
Bao, Weizhu   +3 more
openaire   +2 more sources

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