“可编程阵列逻辑”（GAL）器件编程规律的研究

针对“可编程阵列逻辑”（ＧＡＬ）编程过程中出现的错误，进行了分析，给出了一套编程规则．利用这套规则可充分开发芯片的功能，有效地指导用户对ＧＡＬ编程．

Study on the trajectory prediction curves of supercavitating vehicle

In order to understand the laws of motion for supercavitating vehicle better, simplified equations for longitudinal motion of supercavitating vehicle were derived. Then the corresponding simulation software for trajectory of supereavitating vehicle was programmed, by which the theoretical predicted trajectories of the supercavitating vehicle at different velocities were obtained. It was found that the predicted trajectories at low speed and without cavitation on the vehicle in theory agreed well with those in experiments, and the theoretical predicted trajectories at high speed and with supercavity on the vehicle correctly reflected the motion laws of the supercavitating vehicle. The influences of various parameters of eavitator and rudder on the underwater trajectory were compared and analyzed, which can provide a guide for the design of hydrodynamic distribution and gross parameters of the supereavitating weapons.