scholarly journals A novel autonomous real-time position method based on polarized light and geomagnetic field

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Yinlong Wang ◽  
Jinkui Chu ◽  
Ran Zhang ◽  
Lu Wang ◽  
Zhiwen Wang
Keyword(s):  
Real Time ◽  
Geomagnetic Field ◽  
Polarized Light ◽  
Time Position

scholarly journals Current Trends in Random Walks on Random Lattices

Mathematics ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1148
Author(s):  
Jewgeni H. Dshalalow ◽  
Ryan T. White
Keyword(s):  
Random Walk ◽  
Random Walks ◽  
Real Time ◽  
Real Space ◽  
Historical Background ◽  
Escape Time ◽  
The Real ◽  
Current Trends ◽  
One Step ◽  
Time Position

In a classical random walk model, a walker moves through a deterministic d-dimensional integer lattice in one step at a time, without drifting in any direction. In a more advanced setting, a walker randomly moves over a randomly configured (non equidistant) lattice jumping a random number of steps. In some further variants, there is a limited access walker’s moves. That is, the walker’s movements are not available in real time. Instead, the observations are limited to some random epochs resulting in a delayed information about the real-time position of the walker, its escape time, and location outside a bounded subset of the real space. In this case we target the virtual first passage (or escape) time. Thus, unlike standard random walk problems, rather than crossing the boundary, we deal with the walker’s escape location arbitrarily distant from the boundary. In this paper, we give a short historical background on random walk, discuss various directions in the development of random walk theory, and survey most of our results obtained in the last 25–30 years, including the very recent ones dated 2020–21. Among different applications of such random walks, we discuss stock markets, stochastic networks, games, and queueing.

Design and construction of autonomous real-time position prototype based on multi-polarized skylight

2017 ◽  
Vol 25 (2) ◽  
pp. 312-318 ◽  
Author(s):  
褚金奎 CHU Jin-kui ◽  
张慧霞 ZHANG Hui-xia ◽  
王寅龙 WANG Yin-long ◽  
时 超 SHI Chao
Keyword(s):  
Real Time ◽  
Time Position ◽  
Design And Construction

Real-Time Measurement of Ion Energies for Heavy Ions

2016 ◽  
Vol 698 ◽  
pp. 157-162
Author(s):  
Akihito Yokoyama ◽  
Wataru Kada ◽  
Takahiro Satoh ◽  
Masashi Koka ◽  
Yuya Yokota ◽  
...  
Keyword(s):  
Real Time ◽  
Heavy Ions ◽  
Ion Irradiation ◽  
Detection System ◽  
Objective Lens ◽  
Charge Coupled Device ◽  
Annealing Conditions ◽  
Real Time Measurement ◽  
Position Detection ◽  
Time Position

A real-time position detection system is developed for measuring heavy ions with low fluence and energy of several hundred MeV, which are generated from an azimuthally varying field (AVF) cyclotron accelerator. We investigate the photoluminescence of α-Al2O3 single crystals implanted with Eu (Al2O3:Eu), which is used in the detection system. The Al2O3:Eu scintillators with a fluence of 3.0 × 1016 cm−2 are annealed at 500–900°C. The annealing conditions required for the Al2O3:Eu scintillators to obtain the maximum luminescence are 0.5 h at 600°C. The scintillator is placed on the AVF cyclotron target stage under atmospheric pressure and is irradiated by 260-MeV Ne. An inverted confocal microscope with a ×10 objective lens is positioned behind the Al2O3:Eu scintillator, and the luminescent images during ion irradiation are obtained by a position-sensitive camera unit with a 512 × 512 pixel electron multiplying charge-coupled device. The images indicate that our online measurement system has a sufficient spatial resolution, since the luminous diameter induced by irradiation with 190 ions /s is almost the same as that of the microbeam.

scholarly journals Elasticity Versus Hyperelasticity Considerations in Quasistatic Modeling of a Soft Finger-Like Robotic Appendage for Real-Time Position and Force Estimation

Soft Robotics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 228-249 ◽  
Author(s):  
Ali Shiva ◽  
S.M. Hadi Sadati ◽  
Yohan Noh ◽  
Jan Fraś ◽  
Ahmad Ataka ◽  
...  
Keyword(s):  
Real Time ◽  
Force Estimation ◽  
Time Position ◽  
Soft Finger

scholarly journals A Novel Real-Time Virtual 3D Object Composition Method for 360° Video

2020 ◽  
Vol 10 (23) ◽  
pp. 8679
Author(s):  
Jaehyun Lee ◽  
Sungjae Ha ◽  
Philippe Gentet ◽  
Leehwan Hwang ◽  
Soonchul Kwon ◽  
...  
Keyword(s):  
High Resolution ◽  
Real Time ◽  
Feature Tracking ◽  
Focal Length ◽  
Video Content ◽  
External Position ◽  
Object Composition ◽  
Time Position ◽  
Rotation Parameters ◽  
Stitching Errors

As highly immersive virtual reality (VR) content, 360° video allows users to observe all viewpoints within the desired direction from the position where the video is recorded. In 360° video content, virtual objects are inserted into recorded real scenes to provide a higher sense of immersion. These techniques are called 3D composition. For a realistic 3D composition in a 360° video, it is important to obtain the internal (focal length) and external (position and rotation) parameters from a 360° camera. Traditional methods estimate the trajectory of a camera by extracting the feature point from the recorded video. However, incorrect results may occur owing to stitching errors from a 360° camera attached to several high-resolution cameras for the stitching process, and a large amount of time is spent on feature tracking owing to the high-resolution of the video. We propose a new method for pre-visualization and 3D composition that overcomes the limitations of existing methods. This system achieves real-time position tracking of the attached camera using a ZED camera and a stereo-vision sensor, and real-time stabilization using a Kalman filter. The proposed system shows high time efficiency and accurate 3D composition.

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