Modeling the Channel Time Variation Inside Moving Vehicle
Sign Up to like & getrecommendations! Published in 2017 at "Wireless Personal Communications"
DOI: 10.1007/s11277-016-3655-4
Abstract: In this letter, we propose a new stochastic model for the time variation of wireless channel inside the moving vehicle. In the classical Jakes’ model, the receiver is assumed to move at a certain speed… read more here.
Keywords: inside moving; time variation; channel; moving vehicle ... See more keywords
An iterative application of the Green's function approach to estimate the time variation in 137Cs release to the atmosphere from the Fukushima Daiichi Nuclear Power Station
Sign Up to like & getrecommendations! Published in 2021 at "Atmospheric Environment"
DOI: 10.1016/j.atmosenv.2021.118380
Abstract: Abstract The Green’s function approach, which is an approach to optimize model parameters, was iteratively applied to a large number of pairs of observed and calculated values of surface air concentrations (677 pairs) and ambient… read more here.
Keywords: release; power; approach; time variation ... See more keywords
International evidence of time-variation in trend labor productivity growth
Sign Up to like & getrecommendations! Published in 2018 at "Economics Letters"
DOI: 10.1016/j.econlet.2018.03.025
Abstract: This paper provides international evidence on time-variation in trend productivity growth, based on the dataset for hours worked constructed by Ohanian & Raffo (2012). Applying both the endogenous break tests of Bai & Perron (1998,… read more here.
Keywords: evidence time; productivity; evidence; variation trend ... See more keywords
Forecasting Value-at-Risk of Cryptocurrencies with RiskMetrics type models
Sign Up to like & getrecommendations! Published in 2020 at "Research in International Business and Finance"
DOI: 10.1016/j.ribaf.2020.101259
Abstract: Abstract Since the financial crisis, risk management has been of growing interest to investors and the approach of Value-at-Risk has gained wide acceptance. Investing in Cryptocurrencies brings not only huge rewards but also huge risks.… read more here.
Keywords: value risk; risk; forecasting value; value ... See more keywords
Specification tests for time-varying parameter models with stochastic volatility
Sign Up to like & getrecommendations! Published in 2018 at "Econometric Reviews"
DOI: 10.1080/07474938.2016.1167948
Abstract: ABSTRACT We propose an easy technique to test for time-variation in coefficients and volatilities. Specifically, by using a noncentered parameterization for state space models, we develop a method to directly calculate the relevant Bayes factor… read more here.
Keywords: volatility; time varying; tests time; time ... See more keywords
Wafer sojourn time fluctuation analysis for time-constrained dual-arm multi-cluster tools with activity time variation
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Computer Integrated Manufacturing"
DOI: 10.1080/0951192x.2020.1718767
Abstract: ABSTRACT In semiconductor manufacturing systems, a time-constrained multi-cluster tool should be scheduled such that a wafer stays in a process chamber in a given time range to satisfy a wafer residency time constraint. In practice,… read more here.
Keywords: activity time; time; multi cluster; time variation ... See more keywords
Constraining the time variation of Newton's constant G with gravitational-wave standard sirens and supernovae
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2018/10/052
Abstract: The intrinsic peak luminosity of Type Ia supernovae (SNIa) depends on the value of Newton's gravitational constant G, through the Chandrasekhar mass MCh∝ G−3/2. If the luminosity distance can be independently determined, the SNIa can… read more here.
Keywords: time variation; wave standard; standard sirens; gravitational wave ... See more keywords
The Time Variation Law of Concrete Compressive Strength: A Review
Sign Up to like & getrecommendations! Published in 2023 at "Applied Sciences"
DOI: 10.3390/app13084947
Abstract: Concrete is a building material that is most widely used because of its excellent mechanical performance and durability. Compressive strength is an essential property of concrete, which changes with time under various factors. In this… read more here.
Keywords: strength; time variation; compressive strength; concrete ... See more keywords