Results 1 to 10 of about 66,848 (285)

Three-Dimensional Mapping-Aided Global Navigation Satellite System in Global Navigation Satellite System-Accessible Indoor Areas [PDF]

open access: yesSensors
The Global Navigation Satellite System (GNSS) is commonly used for outdoor positioning. However, its effectiveness diminishes in urban canyons and indoor environments attributed to signal blockage. This study aims to explore the potential of GNSS signals
Hoi-Wah Ng   +3 more
doaj   +2 more sources

Comparative study of strongly and weakly coupled data assimilation with a global land–atmosphere coupled model [PDF]

open access: yesNonlinear Processes in Geophysics, 2023
This study explores coupled land–atmosphere data assimilation (DA) for improving weather and hydrological forecasts by assimilating soil moisture (SM) data.
K. Kurosawa   +11 more
doaj   +1 more source

Fe-Mn based catalytic ceramic filters with SO2 resistance for NH3-SCR at low temperature

open access: yesMaterials Research Express, 2021
The Fe-Mn based catalyst was loaded on porous ceramic filter with impregnation method to prepare a catalytic ceramic filter which integrates the denitration and dust removal at low temperature. The effect of the Fe/Mn ratio and doping Sm on the catalytic
Kun Li   +4 more
doaj   +1 more source

A Sector-Matching Probability Hypothesis Density Filter for Radar Multiple Target Tracking

open access: yesApplied Sciences, 2023
The development of high-tech, dim, small targets, such as drones and cruise missiles, brings great challenges to radar multi-target tracking (MTT), making it necessary to extend the beam dwell time to obtain a high signal-to-noise ratio (SNR).
Jialin Yang   +6 more
doaj   +1 more source

Content-based approach for Vietnamese spam SMS filtering [PDF]

open access: yes2016 International Conference on Asian Language Processing (IALP), 2016
Short Message Service (SMS) spam is a serious problem in Vietnam because of the availability of very cheap pre-paid SMS packages. There are some systems to detect and filter spam messages for English, most of which use machine learning techniques to analyze the content of messages and classify them.
Pham, Thai-Hoang, Le-Hong, Phuong
openaire   +2 more sources

Leveraging Soil Moisture Assimilation in Permafrost Affected Regions

open access: yesRemote Sensing, 2023
The transfer of water and energy fluxes between the ground and the atmosphere is influenced by soil moisture (SM), which is an important factor in land surface dynamics.
Ankita Pradhan   +4 more
doaj   +1 more source

Set-Membership Based Hybrid Kalman Filter for Nonlinear State Estimation under Systematic Uncertainty

open access: yesSensors, 2020
This paper presents a new set-membership based hybrid Kalman filter (SM-HKF) by combining the Kalman filtering (KF) framework with the set-membership concept for nonlinear state estimation under systematic uncertainty consisted of both stochastic error ...
Yan Zhao   +3 more
doaj   +1 more source

Understanding root-zone soil moisture in agricultural regions of Central Mexico using the ensemble Kalman filter, satellite-derived information, and the THEXMEX-18 dataset

open access: yesInternational Journal of Digital Earth, 2022
An Ensemble Kalman Filter (EnKF)-based assimilation algorithm was implemented to estimate root-zone soil moisture (RZSM) using a Soil-Vegetation-Atmosphere Transfer (SVAT) model during a complete growing season of corn in Central Mexico.
Héctor Ernesto Huerta-Bátiz   +5 more
doaj   +1 more source

Improving Surface Soil Moisture Estimation Through Assimilating Satellite Land Surface Temperature With a Linear SM-LST Relationship

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
Soil moisture (SM) plays a vital role in linking the global terrestrial water, energy, and carbon cycles. Land data assimilation (DA) is typically applied for acquiring more accurate SM estimates by incorporating remote sensing (RS) retrievals to ...
Jiaxin Tian   +8 more
doaj   +1 more source

Using evolutionary learning classifiers to do MobileSpam (SMS) filtering [PDF]

open access: yesProceedings of the 13th annual conference on Genetic and evolutionary computation, 2011
In recent years, we have witnessed the dramatic increase in the volume of mobile SMS (Short Messaging Service) spam. The reason is that operators - owing to fierce market competition - have introduced packages that allow their customers to send unlimited SMS in less than $1 a month.
Muhammad Bilal Junaid, Muddassar Farooq
openaire   +1 more source

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