Results 31 to 40 of about 631,049 (308)

Precise line-of-sight modelling for angles-only relative navigation [PDF]

Advances in Space Research, 2021
Abstract This work presents a precise analytical model to reconstruct the line-of-sight vector to a target satellite over time, as required by angles-only relative navigation systems for application to rendezvous missions. The model includes the effects of the geopotential, featuring: the analytical propagation in the mean relative orbital elements ...
Gaias, G., Ardaens, J. -S., Colombo, C.
openaire   +3 more sources

Study on relationships of wind velocity, temperature and measurement precision of relative humidity

浙江大学学报. 农业与生命科学版, 2007
Psychrometric method is widely used to measure the air relative humidity in dryness processing of agricultural products. The experiments about the relationships of the wind velocity v, temperature t and relative humidity U were made in temperature ...
HUANG Xiao-yin, ZHOU Ping
doaj   +1 more source

Attention-Based Lightweight YOLOv8 Underwater Target Recognition Algorithm

Sensors
Underwater object detection is highly complex and requires a high speed and accuracy. In this paper, an underwater target detection model based on YOLOv8 (SPSM-YOLOv8) is proposed. It solves the problems of high computational complexities, slow detection
Shun Cheng, Zhiqian Wang, Shaojin Liu, Yan Han, Pengtao Sun, Jianrong Li   +5 more
doaj   +1 more source

Moving the weber fraction: the perceptual precision for moment of inertia increases with exploration force. [PDF]

PLoS ONE, 2012
How does the magnitude of the exploration force influence the precision of haptic perceptual estimates? To address this question, we examined the perceptual precision for moment of inertia (i.e., an object's "angular mass") under different force ...
Nienke B Debats, Idsart Kingma, Peter J Beek, Jeroen B J Smeets   +3 more
doaj   +1 more source

Precision Measurement of the Mass and Lifetime of the Xi(0)(b) Baryon [PDF]

, 2014
Using a proton-proton collision data sample corresponding to an integrated luminosity of 3 fb(-1) collected by LHCb at center-of-mass energies of 7 and 8 TeV, about 3800 Xi(0)(b) -> Xi(+)(c)pi(-), Xi(+)(c) -> pK(-)pi(+) signal decays are reconstructed ...
Pescatore, L., Beaucourt, L., Baldini, W., Aquines Gutierrez, O., Barschel, C., Barsuk, S., Popov, D., Alexander, M., Ajaltouni, Z., Amerio, S., Aaij, R., Anderlini, L., Kenyon, I. R., Balagura, V., Bachmann, S., Barlow, R. J., Alves, A. A., Ilten, P., Alkhazov, G., Battista, V., Bedeschi, F., Belous, K., Mazurov, A., Artuso, M., An, L., Gutierrez, O. Aquines, Ali, S., Aaijsp, R., Auriemma, G., Artamonov, A., Archilli, F., Lazzeroni, C., Appleby, R. B., Beddow, J., Bediaga, I., Adeva, B., Affolder, A., Andreassen, R., Batozskaya, V., Anderson, J., Baalouch, M., Bifani, S., Onderwater, G.; id_orcid, McCarthy, J., Badalov, A., Watson, N. K.; id_orcid, Barter, W., Belogurov, S., Andrews, J. E., Griffith, P., Adinolfi, M., Aslanides, E., Onderwater, G., Farley, N., Andreotti, M., Amato, S., Akar, S., Alessio, F., Bay, A., Albrecht, J., Alvarez Cartelle, P., Amhis, Y., Back, J. J., Pellegrino, A., Parkinson, C. J.   +64 more
core   +1 more source

Weighted Ranked Set Sampling for Skewed Distributions

Mathematics
Ranked set sampling (RSS) is a useful technique for improving the estimator of a population mean when the sampling units in a study can be more easily ranked than the actual measurement. RSS performs better than simple random sampling (SRS) when the mean
Dinesh S. Bhoj, Girish Chandra
doaj   +1 more source

High-precision gravity measurements using absolute and relative gravimeters at Mount Etna (Sicily, Italy)

Annals of Geophysics, 2011
Accurate detection of time gravity changes attributable to the dynamics of volcanoes requires high-precision gravity measurements. With the aim of improving the quality of data from the Mount Etna gravity network, we used both absolute and relative ...
Ciro Del Negro, Luigi Fortuna, Antonino Sicali, Rosalba Napoli, Gilda Currenti, Filippo Greco, Antonio Pistorio   +6 more
doaj   +1 more source

Frequency Division Control of Line-of-Sight Tracking for Space Gravitational Wave Detector

Sensors, 2022
The space gravitational wave detector uses the inter-satellite laser interferometer to measure a change in distance with ultra-high precision at the picometer level.
Huifang Deng, Yunhe Meng
doaj   +1 more source

Optimal Monte Carlo integration with fixed relative precision

Journal of Complexity, 2013
We consider Monte Carlo algorithms for computing an integral @[email protected][email protected] which is positive but can be arbitrarily close to 0. It is assumed that we can generate a sequence X"n of uniformly bounded random variables with expectation @q.
Leslaw Gajek, Wojciech Niemiro, Piotr Pokarowski   +2 more
openaire   +1 more source

Antenna Configuration Method for RF Measurement Based on DOPs in Satellite Formation Flying

International Journal of Aerospace Engineering, 2018
Radio frequency (RF) measurement technology provides a relative navigation solution that can be of great importance to have significant potential for application to the satellite groups.
Weiqing Mu, Rongke Liu, Zijie Wang, Yukai Liu   +3 more
doaj   +1 more source