寻找一个时间序列里的突变点，并进行检验.-find a abrut point in a time series，and test!

9base 9base is a port of various original Plan 9 tools for Unix, based on plan9port. It currently contains the following original (no source changes) shell commands from Plan 9 for Unix: ascii awk basename bc cal cat cleann

uart测试代码，可测试发送和接收，附编译好的可执行文件，android下编译的Android.mk文件-uart test code, you can test sending and receiving, with the compiled executable file, android compiled under Android.mk file