We aim to invent an automatic bus station reporter based on GPS module, VS1003 chip and SD card. Firstly, the VS1003 chip within the reporter can both decode and play the MP3 files, greatly improving the voice quality of the reporter itself. Secondly, the SD card with giant storage can store the information of bus stations and the accordingly voice files, making it free from the limit of capacity. Besides, with the change of SD cards, the reporter can adjust itself to different bus lines and gives different voice messages.

We aim to invent a supervisory control system of vehicles based on Java NIO. As we know, it needs to connect a large number of client terminals to accomplish the function of the vehicle supervisory control system and if the server is developed by the traditional blocking I/O, severe blocking problem will appear. To solve the problem, the traditional server has to distribute one thread for each client, which leads to system overload and reduces the servers high-performance. The new supervisory control system which we invent, however, can solve this problem effectively by the use of asynchronous input and output mechanisms provided by the new non-blocking I/O. The new server can manage a large number of socket communications with a single thread, reducing the system overhead and improving the servers performance.