Results 31 to 40 of about 3,490,280 (180)

Water Multi-Parameter Sampling Design Method Based on Adaptive Sample Points Fusion in Weighted Space

open access: yesRemote Sensing, 2022
The spatial representativeness of the in-situ data is an important prerequisite for ensuring the reliability and accuracy of remote sensing product retrieval and verification.
Mingjian Zhai   +5 more
doaj   +1 more source

Optimal estimation of the mean function based on discretely sampled functional data: Phase transition [PDF]

open access: yes, 2011
The problem of estimating the mean of random functions based on discretely sampled data arises naturally in functional data analysis. In this paper, we study optimal estimation of the mean function under both common and independent designs. Minimax rates
Cai, T. Tony, Yuan, Ming
core   +3 more sources

Search effort and imperfect detection: Influence on timed-search mussel (Bivalvia: Unionidae) surveys in Canadian rivers

open access: yesKnowledge and Management of Aquatic Ecosystems, 2016
Inventories and population monitoring are essential activities supporting the conservation of freshwater mussel diversity in Canadian rivers. Despite widespread use of timed-search methods to survey river mussels, the relationship between species ...
Reid S. M.
doaj   +1 more source

Estimating Fish Species Richness across Multiple Watersheds

open access: yesDiversity, 2018
Assessing fish species richness at the scale of an entire watershed or multiple watersheds is important when designing conservation areas and maintaining aquatic biodiversity.
Michael H. Paller
doaj   +1 more source

Sandy Beach Macrofauna of Yucatán State (Mexico) and Oil Industry Development in the Gulf of Mexico: First Approach for Detecting Environmental Impacts

open access: yesFrontiers in Marine Science, 2020
The biodiversity of the coastal ecosystems in the Gulf of Mexico is threatened by anthropogenic activities of various kinds. The predominant portion of the land-sea margin in the State of Yucatán consists of exposed sandy beaches.
Edlin Guerra-Castro   +14 more
doaj   +1 more source

Sparsely Sampling the Sky: A Bayesian Experimental Design Approach

open access: yes, 2012
The next generation of galaxy surveys will observe millions of galaxies over large volumes of the universe. These surveys are expensive both in time and cost, raising questions regarding the optimal investment of this time and money.
Jaffe, A. H., Paykari, P.
core   +3 more sources

Exploitation of Digital Filters to Advance the Single-Phase T/4 Delay PLL System [PDF]

open access: yes, 2016
With the development of digital signal processing technologies, control and monitoring of power electronics conversion systems have been evolving to become fully digital.
Blaabjerg, Frede   +2 more
core   +1 more source

A theoretical framework for estimation of AUCs in complete and incomplete sampling designs. [PDF]

open access: yes, 2009
Nonclinical in vivo animal studies have to be completed before starting clinical studies of the pharmacokinetic behavior of a drug in humans. The drug exposure in animal studies is often measured by the area under the concentration versus time curve (AUC)
Jaki, Thomas, Wolfsegger, Martin J.
core   +1 more source

Multi-Resolution Mapping and Accuracy Assessment of Forest Carbon Density by Combining Image and Plot Data from a Nested and Clustering Sampling Design

open access: yesRemote Sensing, 2016
Combining sample plot and image data has been widely used to map forest carbon density at local, regional, national and global scales. When mapping is conducted using multiple spatial resolution images at different scales, field observations have to be ...
Enping Yan   +3 more
doaj   +1 more source

Evaluating the Sampling Design of a Long-Term Community-Based Estuary Monitoring Program

open access: yesFishes, 2021
Community-based monitoring programs (CBMPs) are a cost-effective option to collect the long-term data required to effectively monitor estuaries. Data quality concerns have caused some CBMP datasets, which could fill knowledge gaps for aquatic ecosystems,
Jess A. Kidd   +5 more
doaj   +1 more source

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