Influence of compressive ratio and density on sound absorbing property of foamed aluminum made by bubbling method has been studied and compared with that of Japanese sample.
研究了压缩率和密度对发泡法制备的泡沫铝样品吸声性能的影响，与报道的日本用发泡法制备的泡沫铝样品的研究结果进行了比较。
Based on the invariance of cross-ratio and the collinear property of all points for one dimensional target, a global calibration method of multi-vision sensor system is proposed.
基于交比不变性原理和一维靶标点共线的特点，提出了一种多视觉传感器全局校准方法。
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