Results 31 to 40 of about 702,163 (313)

Abundance and Spectral Characteristics of Molecular Weight Separated Dissolved Organic Matter Released From Biochar at Different Pyrolysis Temperatures

open access: yes, 2022
Biochar (BC) returned to soil will release amounts of dissolved organic matters (DOM), which can change soil-DOM's content and chemical properties and then have important impacts on their environmental behaviors.
Cao Tao   +6 more
core   +1 more source

Factor analysis for spectral estimation [PDF]

open access: yes2017 International Conference on Sampling Theory and Applications (SampTA), 2017
Power spectrum estimation is an important tool in many applications, such as the whitening of noise. The popular multitaper method enjoys significant success, but fails for short signals with few samples. We propose a statistical model where a signal is given by a random linear combination of fixed, yet unknown, stochastic sources.
Andén, Joakim, Singer, Amit
openaire   +3 more sources

Mineralogy and Spectra Study on Dougeng Stone from Shoushan, Fujian Province

open access: yes, 2020
This paper studied main characteristics of Dougeng stone, by means of several Spectra methods like X-ray powder diffraction (XRD) , Fourier transform infrared spectroscopy (FTIR) and Raman spectra, as well as mineralogical methods like hydrostatic ...
Xi Jia-xin, Chen Tao
core   +1 more source

Characterization of the Impurity Phases in Phosphogypsum by the EBSD-XPS Method

open access: yes, 2022
Phosphogypsum (PG) is a solid by product generated from the wet phosphoric acid process. A broad spectrum of compositions, including phosphorus, fluorine, silicon, and other hazardous impurities in the PG matrix significantly affect the PG's quality as ...
Bao Wei-jun   +5 more
core   +1 more source

Convolutional Edge Constraint-Based U-Net for Salient Object Detection

open access: yesIEEE Access, 2019
The salient object detection is receiving more and more attention from researchers. An accurate saliency map will be useful for subsequent tasks. However, in most saliency maps predicted by existing models, the objects regions are very blurred and the ...
Le Han, Xuelong Li, Yongsheng Dong
doaj   +1 more source

Spectral analysis of lithium tremor

open access: yesArchives of Neuropsychiatry, 2020
Lithium has proven efficacy in bipolar affective disorder (BAD) but induces tremor as a side effect in a quarter of patients. Lithium tremor (LT) shares some clinical characteristics of essential tremor (ET) and Parkinson's disease tremor (PT), which might cause difficulties in differential diagnosis.
ÇAKMAKLI, Gül Yalçin   +4 more
openaire   +3 more sources

Spectroscopic Imaging of Cutaneous Squamous Cell Carcinoma Based on Acousto-Optic Filtering

open access: yes, 2020
Noncollinear acousto-optic tunable filter (AOTF) based on TeO2 is a type of good light splitting device with the electric tuning. Because of its advantages of compact size, high stability, fast tuning, and being easy to carry out, it has high practical ...
Huang Zu-fang   +15 more
core   +1 more source

Advances in Equipment for Deep Ultra-Violet Excimer Laser Ablation Coupled Plasma Mass and Optical Emission Spectrometry

open access: yes, 2022
The sample's elemental and isotopic content information can be obtained by inductively coupled plasma mass and optical emission spectrometry analysis of excimer laser ablated products. Excimer laser ablation coupled mass and optical emission spectrometry
Gong Ge-lian   +4 more
core   +1 more source

EXAMINATION OF SPECTRAL TRANSFORMATIONS ON SPECTRAL MIXTURE ANALYSIS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
While many spectral transformation techniques have been applied on spectral mixture analysis (SMA), few study examined their necessity and applicability.
Y. Deng, C. Wu
doaj   +1 more source

Discriminant analysis of concentrations of trace elements in Ulaanbaatar soil

open access: yesProceedings of the Mongolian Academy of Sciences
In this work we investigated, through discriminant analysis, the spatial variability and pollution sources of potential toxic elements in Ulaanbaatar surface soil.
Byambasuren Tsagaan   +2 more
doaj   +1 more source

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