Results 21 to 30 of about 604,710 (266)

Optimization of Selective Assembly for Shafts and Holes Based on Relative Entropy and Dynamic Programming

open access: yesEntropy, 2020
Selective assembly is the method of obtaining high precision assemblies from relatively low precision components. For precision instruments, the geometric error on mating surface is an important factor affecting assembly accuracy.
Mingyi Xing   +3 more
doaj   +1 more source

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

open access: yesAdvances 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

open access: yes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

open access: yesSensors
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   +5 more
doaj   +1 more source

Weighted Ranked Set Sampling for Skewed Distributions

open access: yesMathematics
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

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

open access: yesPLoS 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   +3 more
doaj   +1 more source

Behavioral indicators of calf adaptation to automated milk feeders

open access: yesJournal of Dairy Science
: Training calves to drink milk independently from an automated milk feeder (AMF) requires substantial labor, with calves taking several days to learn; however, it is unknown if feeding behavior can predict successfully trained calves.
B.J. Bone, M.C. Cantor
doaj   +1 more source

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

open access: yesAnnals 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   +6 more
doaj   +1 more source

Optimal Monte Carlo integration with fixed relative precision

open access: yesJournal 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   +2 more
openaire   +1 more source

GPU IMPLEMENTATION OF ATOMIC FLUID MD SIMULATION.

open access: yesTASK Quarterly, 2022
A computer simulation of an atomic fluid on a GPU was implemented using the CUDA architecture. It was shown that the programming model for efficient numerical computing applications was changing with the development of the CUDA architecture.
ALEKSANDER DAWID
doaj   +1 more source

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