This paper analyses the sound decay in an acoustically treated rectangular space from the view point of wave acoustics. and a new method of calculating complex eigenvalue is given.
本文从波动声学观点出发，分析了矩形水池中声能的衰变，给出了一种解算复本征值的新方法。
Experimental results show the new method is at least 20% faster than the existing sequential point tree, and it is much faster in treating the large and complex models, more than 67%.
实验表明，相比于顺序点模型树，新方法的绘制速度更快，加速率至少在20%，特别是在处理大规模复杂模型时的加速率更高，能达67%以上。
In view of the limitation existing in detecting moving point targets in complex background, a new detection method with detailed theory based on spatiotemporal image is presented.
针对复杂背景下运动点目标检测方法存在的局限性，提出从时间空间角度检测运动目标的方法。
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