In 3d scanning system based on dot laser, artificial neural networks are used for calibrating the distortion of CCD range sensor.
在点状激光三维扫描技术中，用线阵CCD采集深度坐标，用前馈型人工神经网络对深度坐标进行非线性修正。
Often the projected light dot on a laser pointer is too small to be seen effectively.
通常激光指物棒中设定好的激光点太小了，显示的效果不是很好。
No, because nothing is actually crossing the surface of the moon - the dot isn't an actual object, it is just a series of photons in the laser beam hitting the surface.
其实不是这样，这是因为此时并没有什么实际的东西真正地横跨了月球的表面-亮点不是一个实体，它仅仅是击中月球表面激光束里一系列的光子。
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