This paper discusses the principle and method of encryption using pseudo random sequence, and gives its implement on PLD.
本文讨论了用伪随机序列实现加密保护的原理、方法及可编程逻辑器件(PLD)实现的具体方法。
2
The relative characteristics of the pseudo code are analyzed. With discussion on the principle ol ultrasonic level measurement based on pseudo code technology, the level measuring system is designed.
分析了伪随机码的相关特性，讨论了基于伪码相关技术的超声波液位测量原理，设计并完成了液位测量系统。
3
Based on the principle of mass balance, this paper deals with rules of. motion of the pseudo-fluid level in the annular space in the process of testing the pumping oil well.