Results 11 to 20 of about 4,003,702 (202)

Indoor Mobile Phone Positioning Method Based on Arrival Time Difference Depending on The Farthest Distance

open access: yesJournal of Harbin University of Science and Technology, 2017
There is not only the lack of the commercial mature technology but also business services in indoor positioning and servicing. In this paper,a mobile phone off the shelf is used as a chirped signal transmitter,several microphone receivers are arranged in
ZHAO Jun
doaj   +1 more source

Cross-correlation cosmography with HI intensity mapping [PDF]

open access: yes, 2015
The cross-correlation of a foreground density field with two different background convergence fields can be used to measure cosmographic distance ratios and constrain dark energy parameters.
Bacon, David   +2 more
core   +3 more sources

Research on cultivated land extraction based on MODIS NDVI time series matching analysis

open access: yes浙江大学学报. 农业与生命科学版, 2008
MODIS NDVI data and time series matching method were used to extract the area of cultivated land with similar phenology. Time series of sample pixels from cultivated land were selected as standard time series spectrum, and the others were treated as ...
WANG Hong-shuo   +3 more
doaj   +1 more source

An Efficient Cross-Correlation Method for a Digital Phase Noise Measurement System [PDF]

open access: yesJournal of Electromagnetic Engineering and Science, 2022
In this paper, we propose a digital phase noise measurement using a 10-bit digital oscilloscope MXR608A from Keysight Technologies. The digital oscilloscope’s four channel data are used for digital phase noise measurement: two channels are assigned for ...
Kyung-Whan Yeom, Jin-Seong Roh
doaj   +1 more source

Characterizing the weather band variability of the Texas shelf current

open access: yesFrontiers in Marine Science, 2023
Considering the benefits of understanding the circulation patterns of the shelf, it is not surprising that there are numerous studies of the Texas Shelf circulation patterns.
Uchenna C. Nwankwo   +9 more
doaj   +1 more source

On the correlation structure of microstructure noise in theory and practice [PDF]

open access: yes, 2008
We argue for incorporating the financial economics of market microstructure into the financial econometrics of asset return volatility estimation. In particular, we use market microstructure theory to derive the cross-correlation function between latent ...
Diebold, Francis X., Strasser, Georg H.
core   +3 more sources

Analysis The Temporal Variation of Water Table Elevation Under The Impact of Precipitation and Consumptions by Using Regression Model and Differential Equation [PDF]

open access: yesعلوم و مهندسی آبیاری, 2017
In order to better exploitation of the available water resources and to prevent water crisis increment, predicting the changes in water resources through different methods will be of great importance. In this study, monthly data of water table elevation,
Maryam Abdollah zade, Ahmad Fakheri Faed
doaj   +1 more source

ATTENUATION OF SCINTILLATION OF DISCRETE COSMIC SOURCES DURING NONRESONANT HF HEATING OF THE UPPER IONOSPHERE

open access: yesRadio Physics and Radio Astronomy, 2014
The aim of the work is to experimentally investigate the response of scintillation spectra and indices of discrete cosmic sources (DCS) to modification of the ionospheric F-region by powerful electromagnetic fields with frequencies exceeding the Langmuir
V. G. Bezrodny   +3 more
doaj   +1 more source

Machine Learning Approaches for MDD Detection and Emotion Decoding Using EEG Signals

open access: yesFrontiers in Human Neuroscience, 2020
Emotional decoding and automatic identification of major depressive disorder (MDD) are helpful for the timely diagnosis of the disease. Electroencephalography (EEG) is sensitive to changes in the functional state of the human brain, showing its potential
Lijuan Duan   +20 more
doaj   +1 more source

Dependence of Connectivity on the Logarithm of Geometric Distance in Brain Networks

open access: yesFrontiers in Physiology, 2021
Physical connections between nodes in a complex network are constrained by limiting factors, such as the cost of establishing links and maintaining them, which can hinder network capability in terms of signal propagation speed and processing power. Trade-
Michele Castelluzzo   +4 more
doaj   +1 more source

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