Results 11 to 20 of about 185,392 (314)
HORIZONS AND PLANE WAVES: A REVIEW [PDF]
Modern Physics Letters A, 2003 We review the attempts to construct black hole/string solutions in asymptotically plane wave spacetimes. First, we demonstrate that geometries admitting a covariantly constant null Killing vector cannot admit event horizons, which implies that pp-waves cannot describe black holes.
Hubeny, Veronika E., Rangamani, Mukund
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Plane waves: to infinity and beyond! [PDF]
Classical and Quantum Gravity, 2002 We describe the asymptotic boundary of the general homogeneous plane wave spacetime, using a construction of the `points at infinity' from the causal structure of the spacetime as introduced by Geroch, Kronheimer and Penrose. We show that this construction agrees with the conformal boundary obtained by Berenstein and Nastase for the maximally ...
Marolf, D., Ross, S. F.
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地球与行星物理论评, 2021 Since Aki (1957) proposed the spatial autocorrelation (SPAC) technology based on the microtremor, the SPAC technique has been independently developed and widely used to infer the S wave velocity at the shallow structure in the field of civil engineering.
Laiyu Lu
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Plane Wave Reverse Time Image for Nondestructive Tests
IEEE Access, 2023 Reverse time migration (RTM) has been a popular method in industry duo to its ability of imaging complex subsurface and no dip restriction. However, RTM based on full matric capture (FMC) data is limited by the time cost of the calculation and cannot be ...
Wanqiu Zheng, Xiaohong Meng, Jian Wang
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Wave Motion Analysis in Plane via Hermitian Cubic Spline Wavelet Finite Element Method
Shock and Vibration, 2020 A plane Hermitian wavelet finite element method is presented in this paper. Wave motion can be used to analyze plane structures with small defects such as cracks and obtain results.
Xiaofeng Xue +3 more
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Investigation of the plane wave coupling to a linearly loaded transmission line network
Известия высших учебных заведений: Проблемы энергетики, 2020 The article is concerned with a complex investigation of the influence of the plane wave coupling with a certain function of time, incident direction and polarization to a linearly loaded transmission line network comprised of three single-wire ...
L. M. Galeev
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Free energy and phase transition of the matrix model on a plane wave [PDF]
, 2005 This is the peer reviewed version of the following article: Free energy and phase transition of the matrix model on a plane-wave, which has been published in final form at 10.1103/PhysRevD.71.065016.
Ramadanovic, B +3 more
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Generation and Analysis of Ultrasound Images Using Plane Wave and Sparse Arrays Techniques
Sensors, 2018 Ultrasonic imaging is one of the most important techniques to help medical diagnosis. However, obtaining high quality images requires the acquisition, processing, and storage of a large amount of data.
Nivaldo T. Schiefler +5 more
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Ultrasonic Rayleigh wave enhancements from angled defects in aluminium [PDF]
, 2011 Non-linear enhancements of ultrasonic surface wave amplitude and frequency have been observed when an incident wave interacts with a surface defect.
Edwards, R. S. (Rachel S.) +7 more
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Solve the passive interference of UHF transmission lines based on LE-PO method
The Journal of Engineering, 2018 On the research about the ultra-high frequency (UHF) re-radiation interference (RRI) from the power lines, traditional high-frequency algorithms need excessive computing resources or have a bad calculation precision.
Bo Tang, Yaowei Li, Hansheng Huang
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