نتایج جستجو برای: passive sampling

تعداد نتایج: 280672  

Journal: :Journal of environmental monitoring : JEM 2005
Branislav Vrana Heidrun Paschke Albrecht Paschke Peter Popp Gerrit Schuurmann

Lipid-filled semipermeable membrane devices (SPMDs) are receiving increasing attention as passive, in situ samplers for the assessment of environmental pollutant exposure. Although SPMDs have been successfully used in a variety of field studies in surface waters, only a few studies have addressed their characteristics as groundwater samplers. In this study, the performance of the SPMDs for moni...

Journal: :Journal of Occupational and Environmental Hygiene 2019

Journal: :CoRR 2014
Akshay Krishnamurthy Aarti Singh

We consider the related tasks of matrix completion and matrix approximation from missing data and propose adaptive sampling procedures for both problems. We show that adaptive sampling allows one to eliminate standard incoherence assumptions on the matrix row space that are necessary for passive sampling procedures. For exact recovery of a low-rank matrix, our algorithm judiciously selects a fe...

2016
João Fabrício Mota Rodrigues Marco Túlio Pacheco Coelho

Sampling the biodiversity is an essential step for conservation, and understanding the efficiency of sampling methods allows us to estimate the quality of our biodiversity data. Sex ratio is an important population characteristic, but until now, no study has evaluated how efficient are the sampling methods commonly used in biodiversity surveys in estimating the sex ratio of populations. We used...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید