Analytical expressions for calculating the quasistatic parameters of coplanar strips and modified coplanar strips on a finitely thick substrate were derived through analyzing the structure with the complementary electrodes on the same substrate [1, 2]. In this Letter we use conformal mapping techniques to investigate the accuracy of these expressions.

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.

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On the basis of GPS module, MP3 module and GPRS module, we aim at designing a bus station reporter developed by the interrupt system of ATmega128. This kind of reporter can make use of the rich interrupt sources provided by ATmega128 to accomplish the functions like receiving and sending the longitude and latitude data, announcing voice messages etc and deal with the reporter’s multifunction, which MCU cannot accomplish at the same time. In addition, the use of interrupt system can greatly simplify the programming, reducing its difficulty and at the same time, it is more convenient for the reporter to expand its functions.