GLARE FROM WINDOW CONSIDERING TIME FLUCTUATION AND TYPES OF TASK

This study presents the integrity diagnosis method of the bolted joint based on nonlinear wave modulation. When the structure that has the contact interface is vibrating at low-frequency, the contact interface is tapping and clapping due to low-frequency vibration. In this condition, the scatter characteristics, such as wave transmissivity and reflectivity, of high-frequency waves in vicinity of the contact interface are fluctuated in synchronization with low-frequency excitation because of the contact acoustic nonlinearity. The time fluctuation of reflection intensity, which expresses the reflectivity in the specific location, of high-frequency waves at the contact interface is given as the reflection intensity map which plots time-spatial map. In this paper, experiment using the beam specimen which has single bolted joint is conducted to examine the performance of the evaluation index based on the fluctuation amplitude of reflection intensity.

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(Digital twin) Wafer sojourn time fluctuation analysis for time-constrained dual-arm multi-cluster tools with activity time variation

International Journal of Computer Integrated Manufacturing ◽

10.1080/0951192x.2020.1718767 ◽

2020 ◽

pp. 1-17

Author(s):

Fajun Yang ◽

Naiqi Wu ◽

Yan Qiao ◽

Rong Su ◽

Chunjiang Zhang

Keyword(s):

Time Variation ◽

Sojourn Time ◽

Fluctuation Analysis ◽

Activity Time ◽

Digital Twin ◽

Cluster Tools ◽

Time Fluctuation ◽

Dual Arm

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The Spatial and Time-Fluctuation of Coulomb Energy in the Low Concentration Impurity Conduction

Progress of Theoretical Physics ◽

10.1143/ptp.23.380 ◽

1960 ◽

Vol 23 (2) ◽

pp. 380-382

Author(s):

Yutaka Toyozawa

Keyword(s):

Coulomb Energy ◽

Low Concentration ◽

Impurity Conduction ◽

Time Fluctuation

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Time-Fluctuation of the Dimer Structure on a Ge(001) Surface Studied by a Monte Carlo Simulation and a First-Principles Calculation

Journal of the Physical Society of Japan ◽

10.1143/jpsj.71.2192 ◽

2002 ◽

Vol 71 (9) ◽

pp. 2192-2199 ◽

Cited By ~ 19

Author(s):

Hiroshi Kawai ◽

Yoshihide Yoshimoto ◽

Hiromitsu Shima ◽

Yoshimichi Nakamura ◽

Masaru Tsukada

Keyword(s):

Monte Carlo Simulation ◽

Monte Carlo ◽

First Principles ◽

First Principles Calculation ◽

Dimer Structure ◽

Time Fluctuation

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Temperature and humidity monitoring to identify ideal periods for liquefaction on Earth and Mars – data from the High Andes

Geological Quarterly ◽

10.7306/gq.1559 ◽

2020 ◽

Vol 64 (4) ◽

Author(s):

Akos KERESZTURI ◽

Bernadett PAL ◽

Akos GYENIS

Keyword(s):

Atmospheric Pressure ◽

Atacama Desert ◽

High Elevation ◽

Strong Impact ◽

Night Time ◽

Slope Winds ◽

The Future ◽

Low Humidity ◽

Time Fluctuation ◽

Humidity Monitoring

During an almost two week-long field campaign in the Atacama Desert high altitude region of Ojos del Salado volcano, temperature (T) and relative humidity (RH) values were monitored on the surface and <1–5 cm sized rocks, focusing on the night-time values. The aim was to identify and evaluate potential temporal characteristics of daily T and RH changes, searching for ideal periods for deliquescence that has recently been proposed for Mars. Although the atmospheric pressure on Mars is much lower than on Earth, and the atmosphere is drier in general, the huge daily temperature fluctuation there could produce elevated humidity values at night-time; this aspect has thus been analysed on Earth at a desert location, where because of the high elevation night-time cooling is very strong, just like on Mars. Different nearby surface locations showed the same temporal T/RH characteristics, but evident variations were observed between different days. Strong fluctuations could be observed on 10–20 minute long temporal scales, that might influence the deliquescence process, and should be accounted for in future missions aiming to analyse this process on Mars. Night-time periods were favourable for deliquescence. Among the modelled Mars-relevant salts [CaCl2, Ca(ClO4)2, Mg(ClO4)2, NaCl] the longest durations of possible deliquescence were for CaCl2, Ca(ClO4)2 and Mg(ClO4)2, ~7–12 hours for one day. The duration for deliquescence showed some increase along with the rising elevation, due to the decreasing night-time temperature. Thus despite the low humidity on Mars, the cold nights may cause elevated RH towards deliquescence. The Atacama Desert locations analysed are a useful analogue of the deliquescence process on Mars. Fluctuation in RH was observed in night-time, suggesting that similar variability might be present on Mars, and that should be considered in the future, including in evaluating how fast the microscopic liquid formation progresses. Night-time slope winds expected on Mars might have a strong impact on the local T/RH conditions. A more detailed analysis in the future should focus on identifying and separating regions with and without much of the expected night-time fluctuation

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Micro-Risk Propagation Model Based on Time Fluctuation Factor

2019 2nd International Conference on Artificial Intelligence and Big Data (ICAIBD) ◽

10.1109/icaibd.2019.8837041 ◽

2019 ◽

Cited By ~ 1

Author(s):

Yangyuanxiang Xu ◽

Yawei Zhao ◽

Bing Xu

Keyword(s):

Propagation Model ◽

Model Based ◽

Time Fluctuation

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Influence of Evacuation Walkway Design Parameters on Passenger Evacuation Time along Elevated Rail Transit Lines Using a Multi-Agent Simulation

Sustainability ◽

10.3390/su11216049 ◽

2019 ◽

Vol 11 (21) ◽

pp. 6049 ◽

Cited By ~ 2

Author(s):

Zihua Pan ◽

Qingchao Wei ◽

Olav Torp ◽

Albert Lau

Keyword(s):

Safety Management ◽

Design Parameters ◽

Rail Transit ◽

Evacuation Time ◽

Transit Systems ◽

Risk Zone ◽

Agent Simulation ◽

Multi Agent ◽

Time Fluctuation ◽

Evacuation Safety

Passenger evacuation on elevated railway lines has always been an important issue for elevated rail transit safety management, because it is challenging to evacuate passengers efficiently in the event of man-made calamities and natural disasters. Therefore, an evacuation walkway has been designed as a primary solution to assist passenger evacuation during an emergency on elevated rail transit lines. However, investigations on how evacuation walkway designs influence passenger evacuation time are still limited. This study established two evacuation scenarios of interval evacuation on elevated rail transit lines and put forward a new evacuation time measurement method, based on the concept of ‘evacuation time for passengers leaving the evacuation walkway risk zone’. Then, the evacuation time for 90 combinations of entrance widths and walkway widths was simulated by a multi-agent evacuation simulator, Pathfinder, considering 1032 passengers being evacuated both unidirectionally and bidirectionally. The results show that the entrance width and walkway width have a combined effect on passenger evacuation time. An increase in the walkway width from 0.7 m to 1.5 m may potentially reduce the evacuation time by 54.5% in unidirectional evacuation, and 35.2% in bidirectional evacuation. An increase in the entrance width results in a noticeable evacuation time fluctuation when the walkway width is 0.7 and 0.8 m for both evacuation scenarios, while in a bidirectional evacuation, a noticeable fluctuation also can be observed when the walkway width is within the range of 1.4–1.5 m. According to the study, a potentially good design parameter combination for a newly built evacuation walkway is 1.3 m and 1.4 m for the walkway width and entrance width, respectively. The findings from this study may provide a useful reference in the optimization of the design of evacuation facilities and improvement of passenger evacuation safety in rail transit systems.

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