Results 31 to 40 of about 834,727 (299)

The Maslov index and the spectral flow—revisited [PDF]

Fixed Point Theory and Applications, 2019
19 ...
Marek Izydorek, Joanna Janczewska, Nils Waterstraat   +2 more
openaire   +4 more sources

Boosting Semantic Segmentation of Remote Sensing Images by Introducing Edge Extraction Network and Spectral Indices

Remote Sensing, 2023
Deep convolutional neural networks have greatly enhanced the semantic segmentation of remote sensing images. However, most networks are primarily designed to process imagery with red, green, and blue bands.
Yue Zhang, Ruiqi Yang, Qinling Dai, Yili Zhao, Weiheng Xu, Jun Wang, Leiguang Wang   +6 more
doaj   +1 more source

Research on Monitoring Nitrogen Content of Soybean Based on Hyperspectral Imagery

Agronomy
In order to analyze the relationship between hyperspectral image and soybean canopy nitrogen content in the field, and to establish a prediction model for soybean canopy nitrogen content with few parameters and a simple structure, hyperspectral image ...
Yakun Zhang, Mengxin Guan, Libo Wang, Xiahua Cui, Yafei Wang, Peng Li, Shaukat Ali, Fu Zhang   +7 more
doaj   +1 more source

The spectral index image of the radio halo in the cluster Abell 520 hosting a famous bow shock

, 2013
Synchrotron radio emission is being detected from an increasing number of galaxy clusters. Spectral index images are a powerful tool to investigate the origin, nature, and connection of these sources with the dynamical state of the cluster.
Clarke, T. E., Feretti, L., Giovannini, G., Govoni, F., Murgia, M., Perley, R. A., Vacca, V.   +6 more
core   +1 more source

Witten index, axial anomaly, and Krein's spectral shift function in supersymmetric quantum mechanics [PDF]

, 1987
A new method is presented to study supersymmetric quantum mechanics. Using relative scattering techniques, basic relations are derived between Krein’s spectral shift function, the Witten index, and the anomaly.
Bollé, D., Gesztesy, F., Grosse, H., Schweiger, W., Simon, B.   +4 more
core   +1 more source

Spectral flow and resonance index [PDF]

Dissertationes Mathematicae, 2017
It has been shown recently that spectral flow admits a natural integer-valued extension to essential spectrum. This extension admits four different interpretations; two of them are singular spectral shift function and total resonance index. In this work we study resonance index outside essential spectrum.
openaire   +2 more sources

Estimation of Soil Organic Matter Based on Spectral Indices Combined with Water Removal Algorithm

Remote Sensing
Soil moisture strongly interferes with the spectra of soil organic matter (SOM) in the near-infrared region, which reduces the correlation between organic matter and spectra and decreases accuracy in the prediction of SOM.
Jiawei Xu, Yuteng Liu, Changxiang Yan, Jing Yuan   +3 more
doaj   +1 more source

Assessment of the SASI Spectral Shape Index Time Series for Mapping Rice Ecosystems in the Mediterranean Region

Agronomy, 2021
There is a growing need to map rice ecosystems and to develop methods for monitoring rice distribution in order to account for rapid land use changes worldwide.
Lucía Tornos, José Antonio Domínguez, Maria C. Moyano, Laura Recuero, Víctor Cicuéndez, María Jesús García-García, Alicia Palacios-Orueta   +6 more
doaj   +1 more source

Ambiguity in running spectral index with an extra light field during inflation

, 2015
At the beginning of inflation there could be extra dynamical scalar fields that will soon disappear (become static) before the end of inflation. In the light of multi-field inflation, those extra degrees of freedom may alter the time-dependence of the ...
Kohri, Kazunori, Matsuda, Tomohiro
core   +1 more source

Radio Spectrum and Distance of the SNR HB9 [PDF]

, 2006
New images are presented of the supernova remnant (SNR) HB9 based on 408 MHz and 1420 MHz continuum emission and HI-line emission data of the Canadian Galactic Plane Survey (CGPS) by the Dominion Radio Astrophysical Observatory (DRAO).
Alvarez, Caswell, Cox, D. A. Leahy, Fürst, Haslam, Higgs, Leahy, Leahy, Leahy, Leahy, Leahy, Leahy, Leahy, Lozinskaya, Manchester, Milne, Reich, Reich, Taylor, Tian, Uyaniker, W. W. Tian, White, Zhang   +24 more
core   +2 more sources