It may ride its own large, but strategically dead-ending, business for a long time; but it could also find itself missing out on the huge next wave of the Internet — social.

很长时间内，其业务可能依然庞大无比，但是从战略上看，却没有出路可言；另一方面，它也可能发现自己正与下一波互联网洪流——社交——失之交臂。

A sawtooth wave rises (or falls) in a straight line from a starting point to an ending point, at which time it instantaneously jumps back to the starting value.

锯齿波从某一始点到某一终点沿着一条直线上升(或者下降)，在终点的时候它马上跃迁回其起始值。

An optimization method is proposed to improve the reliability of getting the traveling wave head, smoothing both beginning and ending data.

并进一步提出了通过平滑处理故障首尾数据的优化方法提高行波波头提取的可靠性。