利用间接匹配法，首先构造出外部解，然后引入升长变量，最后构造出激波在区间内的激波解。
Using indirect matching method, we construct outer solutions, then introduce stretch variable, and at last the shock solutions in interval.
在此基础上，提出了一种简单的基于BER区间划分的帧长控制的信道自适应发送策略。
At last, based on the range of BER, a simple channel adaptive strategy is proposed to control the frame length.
本文假定跨区间无缝线路中的无缝道岔为一结构体系，岔枕为连续弹性基础上的有限长梁。
This paper assumes that the welded turnout in the continuously welded rail track is a structural system, and the railway tie in the welded turnout is a beam on the continuously elastic foundation.
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