演講公告
新聞標題： ( 2008-01-28 )
演講主題：Computational High Frequency Wave Propagation
主講人：Professor Claes Olof Runborg(NADA, Royal Institute of Technology (KTH))
演講日期：97年1月29日(星期二)<br>下午2:30 – 3:30
演講地點：(光復校區)科學一館223室
茶會時間：當天下午2:00於科學一館205室
摘要內容：
The numerical approximation of high frequency wave propagation is important in many applications, including geophysics, electromagnetics and acoustics. When the wavelength is short compared to the overall size of the computational domain direct simulation using standard wave equations is very expensive. Fortunately, there are computationally much less costly models that are good approximations of many wave equations precisely for very high frequencies. In this talk I will discuss the geometrical optics approximation, which is the infinite frequency limit of wave equations. Geometrical optics has traditionally been simulated using ray tracing. More recently numerical procedures based on various partial differential equations have been introduced. I will survey such numerical methods for geometrical optics and also briefly discuss finite frequency corrections.
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