基于图论的多叉路口相位设计方案 用图论的方法计算出一个多叉路口用信号控制的情况下所需的最优相位个数。至于这种相位个数能不能达到交叉路口的最大通行容量，以及最短的排队时间和排队长度，都不在本文研究的范围之内，因此，未来可以根据本文提供设计的相位个数来研究上述问题。-The intersection is the “bottleneck” of the road network’s traffic capacity and the “Multi-happening” of traffic acc

The Vigenère cipher is a method of encrypting alphabetic text by using a series of different Caesar ciphers based on the letters of a keyword. It is a simple form of polyalphabetic substitution. The Vigenère (French pronunciation: ​[viʒnɛːʁ]) cipher