Results 251 to 260 of about 1,191,176 (295)

Empirical evaluation of microtremor H/V spectral ratio [PDF]

Bulletin of Earthquake Engineering, 2008
The objective of this work is to perform a purely empirical assessment of the actual capabilities of the horizontal-to-vertical (H/V) spectral ratio technique to provide reliable and relevant information concerning site conditions and/or site amplification.
Haghshenas E, Bard PY, Theodulidis N, SESAME WP Team K Atakan Universityu of Bergen, F Cara INGV, C Cournou ETHZ then LGIT, G Cultrera INGV, G Di Giulio INGV, P Dimitriou ITSAK, D Fah ETHZ, R de Franco CNRIDPA, A Marcellini CNRIDPA, M Pagani CNRIDPA, A Rovelli INGV, A Savvaidis ITSAK, A Tento CNRIDPA, S Vidal CETE, S Zacharopoulos ITSAK   +17 more
openaire   +3 more sources

Some of the next articles are maybe not open access.

Related searches:

Seismic Noise Azimuthal Spectral Ratios to Monitor Landslide Kinematics

NSG2021 27th European Meeting of Environmental and Engineering Geophysics, 2021
Summary In this work, we explore the potential of seismic noise as a monitoring tool for landslide kinematic behavior. We monitored an earth slide with low-frequency seismometers and we collected ambient vibrations during two following stages characterized by different displacement rates and stress states of the involved media.
Aguzzoli A., Zanzi L., Arosio D.
openaire   +3 more sources

Spectral ratio lidar for objects detection

2009 IEEE International Geoscience and Remote Sensing Symposium, 2009
In this paper a new technique of objects measurement based on spectral ratio lidar system has been proposed and developed to make horizontal-path laser measurements of objects. The two or more wavelengths laser transmitter operates within and adjacent to the sensitive bands exhibited by the characteristics of each object, the result could be used to ...
Shalei Song, Pingxiang Li, Wei Gong, Liangpei Zhang, Bo Zhu, Lilei Lv, Daoxi Zhang   +6 more
openaire   +1 more source

Spectral ratio biospheric Lidar

IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004
A new active vegetation index measurement technique has been developed and demonstrated using low power laser diodes to make horizontal-path lidar measurements of nearby deciduous foliage. The two wavelength laser transmitter operates within and adjacent to the 680 nm absorption feature exhibited by all chlorophyll containing vegetation.
openaire   +1 more source

Ratio method for fluorescence spectral deconvolution

Analytical Chemistry, 1981
Abstract : A procedure is described for the spectral deconvolution of multicomponent fluorescence data using a ratio method. The only criteria for deconvolution is that each component must have a spectral region where it is the only emitter and that the acquired data sets have a reasonable signal to noise ratio.
Michael P. Fogarty, Isiah M. Warner
openaire   +1 more source

Investigation of solar spectral irradiance measurements using the spectral matching ratio

2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC), 2018
The spectral matching ratio (SMR) is an index used to classify the direct solar spectrum based on the relative difference between the spectrum under study and the reference AM1.5 spectrum. This paper evaluates the spectral conditions of a location characterized by a hot semi-arid climate (i.e.
Paraskeva, Vasiliki, Florides, Michalis, Theristis, Marios, Georghiou, George E., Paraskeva, Vasiliki, Florides, Michalis, Theristis, Marios, Georghiou, George E.   +7 more
openaire   +2 more sources

Argon branching ratios for spectral-intensity calibration

Journal of the Optical Society of America, 1981
Branching ratios have been measured for 104 emission lines from 24 levels in Ar i and Ar II. These branching ratios may be used to calibrate the relative detection efficiency of a spectrometer over the 2900–23000-A wavelength range.
D. L. Adams, W. Whaling
openaire   +1 more source

Spectral ratio method for measuring emissivity

Remote Sensing of Environment, 1992
Abstract The spectral ratio method is based on the concept that although the spectral radiances are very sensitive to small changes in temperature the ratios are not. Only an approximate estimate of temperature is required thus, for example, we can determine the emissivity ratio to an accuracy of 1% with a temperature estimate that is only accurate ...
openaire   +1 more source

Compression Ratio Design in Compressive Spectral Imaging

2016 Data Compression Conference (DCC), 2016
In this work, a compression strategy for Focal Plane Array Measurements (FPA_M) in Compressive Spectral Imaging (CSI) is presented. The strategy is applied to four CSI architectures. The implementation consists of two stages: transformation and coding. The transformation stage is performed according to the FPA_M structure. Finally, an arithmetic coding
Jeison Marin, Leonardo Betancur, Henry Arguello   +2 more
openaire   +1 more source

Estimating the ratios of spectral components

Applied Ocean Research, 1990
Methods of estimating the ratios of spectral components from two sets of measurements are investigated, and statistics of the estimators derived. If the true spectra are invariant during all the measurements, then the ratio of the mean spectral components is shown to be a good estimator; if the spectra vary, then it may be better to calculate the mean ...
openaire   +1 more source