Results 11 to 20 of about 7,268,324 (253)

The treatment of corner and pole-type singularities in numerical conformal mapping techniques [PDF]

open access: yes, 1984
This paper is a report of recent developments concerning the nature and the treatment of singularities that affect certain numerical conformal mapping techniques.
Warby, MK, Hough, DM, Papamichael, N
core   +4 more sources

A New Mapping Function for Spaceborne TEC Conversion Based on the Plasmaspheric Scale Height

open access: yesRemote Sensing, 2021
The mapping function is crucial for the conversion of slant total electron content (TEC) to vertical TEC for low Earth orbit (LEO) satellite-based observations.
Mengjie Wu   +6 more
doaj   +1 more source

Improved GNSS Water Vapor Tomography With Modified Mapping Functions

open access: yesGeophysical Research Letters, 2022
The use of optimized GNSS mapping functions is here shown to lead to significant improvements in the performance of a water vapor tomographic model, totally driven by GNSS observations.
P. M. A. Miranda, P. Mateus
doaj   +1 more source

Numerical conformal mapping of exterior domains [PDF]

open access: yes, 1981
The work of the present paper is closely related to the two numerical procedures described in [11], for determining approximations to the function which maps conformally a bounded simply-connected domain Ω1 , with boundary ∂Ω, onto the unit disc.
Kokkinos, CA, Papamichael, N
core   +4 more sources

Comparison of Tropospheric Signal Delay Models for GNSS Error Simulation [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2009
As one of the GNSS error simulation case studies, we computed tropospheric signal delays based on three well-known models (Hopfield, Modified Hopfield and Saastamoinen) and a simple model. In the computation, default meteorological values were used.
Hye-In Kim   +4 more
doaj   +1 more source

A Joint Multiuser Detection Scheme for UWB Sensor Networks Using Waveform Division Multiple Access

open access: yesIEEE Access, 2017
A joint multiuser detection (MUD) scheme for wireless sensor networks (WSNs) is proposed to suppress multiple access interference (MAI) caused by a large number of sensor nodes.
Zhendong Yin   +4 more
doaj   +1 more source

Effects of Tropospheric Mapping Functions on GPS Data Processing [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2010
In processing space geodetic data, mapping functions are used to convert the tropospheric signal delay along the zenith direction to the line of sight direction.
JihyeWon   +3 more
doaj   +1 more source

Vertical deformation of the fault-crossing network around Baotou, observed by GPS

open access: yesGeodesy and Geodynamics, 2013
GPS data and precise leveling data of seismic network profiles across the fault in Baotou in 2006, 2009 and 2011 were processed and analyzed to test the feasibility of using GPS technology for fault-crossing vertical deformation monitoring.
Qin Shanlan, Du Weiji, Ji Lingyun
doaj   +1 more source

On ionosphere-delay processing methods for single-frequency precise-point positioning

open access: yesGeodesy and Geodynamics, 2011
In single-frequency precise-point positioning of a satellite, ionosphere delay is one of the most important factors impacting the accuracy. Because of the instability of the ionosphere and uncertainty of its physical properties, the positioning accuracy ...
Tu Rui   +3 more
doaj   +1 more source

QoS to QoE Mapping Function for Iptv Quality Assessement Based on Kohonen Map: A Pilot Study

open access: yesTransport and Telecommunication, 2020
This paper deals with an analysis of Kohonen map usage possibility for real-time evaluation of end-user video quality perception. The Quality of Service framework (QoS) describes how the network impairments (network utilization or packet loss) influence ...
Frnda Jaroslav   +4 more
doaj   +1 more source

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