An error analysis is presented for the spectral-Galerkin method to the Helmholtz equation in 2and 3-dimensional exterior domains. The problem in unbounded domains is first reduced to a problem on a bounded domain via the Dirichlet-to-Neumann operator, and then a spectral-Galerkin method is employed to approximate the reduced problem. The error analysis is based on exploring delicate asymptotic ...

harmonics have become an important issue in modern power systems. the widespread penetration of non-linear loads to emerging power systems has turned power quality analysis into an important operation issue under both steady state and transient conditions. this paper employs an extended harmonic domain (ehd) based framework for dynamic analysis of long term analysis over voltages during the tra...

Velocity models can be automatically updated by differential semblance velocity analysis (DSVA). To overcome the dip limitations associated with the one-way wave equation based imaging algorithms, we propose in this study that the common image gathers can be defined other than in horizontal offset domain within the reverse time migration(RTM) framework, where two-way wave equation is solved as ...

In recent years, time-domain numerical analysis for sound wave propagation has been investigated widely as a result of advances in computer technology. For sound field imaging and/or prediction, the development of accurate numerical schemes is an important issue. A method of characteristics (MOC) is used as a time domain numerical analysis method, examples of which are the constrained interpola...

The dynamic behavior of tension leg platforms (TLPs) under the simultaneous action of random wind and wave fields is investigated in this study. Computationally efficient time and frequency domain analysis procedures are developed to analyze wind-wavecurrent-structure interaction problems. The aerodynamic load effects are described by the space-time description of the random wind field. The hyd...

Wave field synthesis is an auralization technique which allows to control the entire wave field within the entire listening area. However, reflections in the listening room interfere with the auralized wave field and may impair the spatial reproduction. Active listening room compensation aims at reducing these impairments by using the playback system. Due to the high number of playback channels...