Results 31 to 40 of about 6,531,643 (307)

High-Precision Collaborative Relative Navigation Method for Multiple Aircraft Based on Geometric Topology Constraints [PDF]

open access: yesHangkong bingqi
Multiple aircraft formation has strong multi operation capability, high reliability and high overall efficiency, which is an important direction for the future development of aviation field.
Lu Kewen, Wang Xinlong, Wang Bin
doaj   +1 more source

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

Study of the one-way speed of light anisotropy with particle beams [PDF]

open access: yes, 2017
Concepts of high precision studies of the one-way speed of light anisotropy are discussed. The high energy particle beam allows measurement of a one-way speed of light anisotropy (SOLA) via analysis of the beam momentum variation with sidereal phase ...
Wojtsekhowski, B.
core   +2 more sources

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

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

Optimal measurements for quantum spatial superresolution [PDF]

open access: yes, 2018
We construct optimal measurements, achieving the ultimate precision predicted by quantum theory, for the simultaneous estimation of centroid, separation, and relative intensities of two incoherent point sources using a linear optical system.
Grover, J.   +5 more
core   +2 more sources

Nanofiber Aerogels with Precision Macrochannels and LL‐37‐Mimic Peptides Synergistically Promote Diabetic Wound Healing

open access: yesAdvanced Functional Materials, 2022
Fast healing of diabetic wounds remains a major clinical challenge. Herein, this study reports a strategy to combine nanofiber aerogels containing precision macrochannels and the LL‐37‐mimic peptide W379 for rapid diabetic wound healing.
Johnson V. John   +12 more
semanticscholar   +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

Search for extrasolar planets with high-precision relative astrometry

open access: yes, 2008
We present our search program for substellar companions using high-precision relative astronomy. Due to its orbital motion around the star, an unseen substellar companion would produce a periodic "wobble" of the host star, which is the astrometric signal
Andreas Seifahrt   +4 more
core   +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

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