Results 111 to 120 of about 3,149 (183)

Ensemble Based Estimation of Wet Refractivity Indices Using a Functional Model Approach

Earth and Space Science
The estimation of the wet refractivity indices is crucial for applications like weather predictions or improving the accuracy of real‐time positioning techniques.
Masoud Dehvari, Saeed Farzaneh, Ehsan Forootan   +2 more
doaj   +1 more source

HASH-Z: A Height-Correction Adjusted Spherical Harmonic Model for Real-Time Tropospheric Delay Correction Over China

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Precise point positioning (PPP) has become a key technique in global navigation satellite systems (GNSS) applications, but its use in real-time is limited by long convergence times.
Hao Chen, Ningbo Wang, Kefei Zhang, Tomasz Hadas, Zishen Li, Hongxing Zhang, Suqin Wu, Longjiang Li, Hang Zhong, Liang Wang   +9 more
doaj   +1 more source

Measurement report: Can zenith wet delay from GNSS “see” atmospheric turbulence? Insights from case studies across diverse climate zones [PDF]

Atmospheric Chemistry and Physics
Global navigation satellite system (GNSS) microwave signals are nearly unaffected by clouds but are delayed as they travel the troposphere. The hydrostatic delay accounts for approximately 90 % of the total delay and can be modelled well as a function of
G. Kermarrec, X. Calbet, Z. Deng, C. Carbajal Henken   +3 more
doaj   +1 more source

Empirical tropospheric zenith wet delay models with strong generalization capability based on a robust machine learning fusion algorithm

Geodesy and Geodynamics
Tropospheric zenith wet delay (ZWD) plays a vital role in the analysis of space geodetic observations. In recent years, machine learning methods have been increasingly applied to improve the accuracy of ZWD calculations.
Jiahao Zhang, Qin Liang, Yunqing Huang
doaj   +1 more source

The Endowment Effect, Status Quo Bias and Loss Aversion: Rational Alternative Explanation [PDF]

The endowment effect, status quo bias, and loss aversion are robust and well documented results from experimental psychology. They introduce a wedge between the prices at which one is willing to sell or buy a good.
Dupont, Dominique Y.
core  

LA DOCTRINE DU PARALLÉLISME DE SPINOZA ET LE PROGRAMME ÉPISTÉMOLOGIQUE D'EINSTEIN [PDF]

, 1985
Bien que le spinozisme d'Einstein ne soit pas celui d'un érudit et que l'on doive parler, plutôt que d'influence, de résonances ou d'affinités de sa pensée avec celle de Spinoza, il n'est pas sans intérêt de s'arrêter quelque peu aux références ...
Paty, Michel
core   +2 more sources

Was sind gute Nachhaltigkeitsindikatoren? OECD-Methode und Generationenbilanzierung im empirischen Vergleich [PDF]

, 2004
Die traditionell verwendeten Kennzahlen staatlicher Haushaltsrechnung wie Finanzierungssaldo, Staatsverschuldung und Schuldenquote bilden aber lediglich das laufende Jahr bzw.
Benz, Ulrich, Fetzer, Stefan
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The Central Limit Theorem for a non linear algorithm based on quantization [PDF]

, 2002
In a serry of papers we have presented an algorithm based on quantization for pricing American options. More generally this amounts to solve numerically an obstacle problem for some semi linear PDE^s. Our algorithm is based on a Monte Carlo method and so
Bally, Vlad
core   +2 more sources

Wet Refractivity tomographic reconstruction over small areas using an ad-hoc GPS receivers network [PDF]

, 2011
One of the most attractive scientific issues in the use of GNSS (Global Navigation Satellite System) signal from a meteorological point of view, is the retrieval of high resolution tropospheric water vapour maps.
Cucca, Manuela, Notarpietro, Riccardo, Venuti, G.   +2 more
core  

The gender dimensions of environmental change : an exploration of the experiences and perceptions of rural men and women in Zimbabwe : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Development Studies at Massey University, Manawatu, New Zealand [PDF]

, 2016
Processes of environmental change have taken place for centuries both as a result of natural variability and anthropogenic forces. As a concept however, environmental change continues to be used narrowly to refer to environmental changes which are ...
Shumba, Dorcas Stellah Tsitsi
core