Results 21 to 30 of about 147,262 (309)

Sparse Approximation of the Precision Matrices for the Wide-Swath Altimeters

open access: yesRemote Sensing, 2022
The upcoming technology of wide-swath altimetry from space will deliver a large volume of data on the ocean surface at unprecedentedly high spatial resolution.
Max Yaremchuk
doaj   +1 more source

Throwing motion design based on minimum sensitivity with respect to error covariance of robot dynamic parameters

open access: yesMechanical Engineering Journal, 2020
Throwing by a powered manipulator is an effective way for wide range transportation of an object and carrying an object in unmanned environments. The main problems of throwing are (i) how far the manipulator can throw the object and (ii) the accuracy of ...
Masafumi OKADA, Takahiro SEKIGUCHI
doaj   +1 more source

Harmonization of Space-Borne Infra-Red Sensors Measuring Sea Surface Temperature

open access: yesRemote Sensing, 2020
Sea surface temperature (SST) is observed by a constellation of sensors, and SST retrievals are commonly combined into gridded SST analyses and climate data records (CDRs).
Christopher J. Merchant   +5 more
doaj   +1 more source

Stochastic parameter identification based on dynamic/static sensitivity analysis for feed-forward control of robot periodic motion

open access: yesNihon Kikai Gakkai ronbunshu, 2022
In robotic thick plate welding, the welding strength is ensured by periodically oscillating the welding torch attached to the end-effector in the horizontal direction, which is called weaving motion.
Masafumi OKADA   +2 more
doaj   +1 more source

The impact of covariate measurement error on risk prediction [PDF]

open access: yesStatistics in Medicine, 2015
In the development of risk prediction models, predictors are often measured with error. In this paper, we investigate the impact of covariate measurement error on risk prediction. We compare the prediction performance using a costly variable measured without error, along with error‐free covariates, to that of a model based on an inexpensive surrogate ...
Khudyakov, Polyna   +3 more
openaire   +4 more sources

Analysis of the influence of different assimilation experiments of radar data on short-term precipitation forecast

open access: yes暴雨灾害, 2022
Based on the radar data direct assimilation system established by the Chongqing Meteorological Bureau in cooperation with the Center for Analysis and Prediction of Storms of the University of Oklahoma, a set of radar data assimilation and forecasting ...
Jingting HU, Lianglü CHEN, Yu XIA
doaj   +1 more source

Robust covariance estimation for data fusion from multiple sensors [PDF]

open access: yes, 2011
This paper addresses the robust estimation of a covariance matrix to express uncertainty when fusing information from multiple sensors. This is a problem of interest in multiple domains and applications, namely, in robotics.
Lazarus, Samuel B.   +5 more
core   +1 more source

Polar Region Integrated Navigation Method Based on Covariance Transformation

open access: yesApplied Sciences, 2021
Aircraft flying the trans-arctic routes usually apply inertial navigation mechanization in two different navigation frames, e.g., the local geographic frame and the grid frame.
Yongjian Zhang   +3 more
doaj   +1 more source

Covariance matrix estimation with heterogeneous samples [PDF]

open access: yes, 2008
We consider the problem of estimating the covariance matrix Mp of an observation vector, using heterogeneous training samples, i.e., samples whose covariance matrices are not exactly Mp.
Bidon, Stéphanie   +2 more
core   +1 more source

Facilitating Inversion of the Error Covariance Models for the Wide-Swath Altimeters

open access: yesRemote Sensing, 2020
Wide-swath satellite altimeter observations are contaminated by errors caused by the uncertainties in the geometry and orientation of the on-board interferometer.
Max Yaremchuk   +2 more
doaj   +1 more source

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