Finally , this paper set up the substitute model between the new technology and the old one and studied characteristic of the diffusion system applied system dynamic method such as the stable points and phase portrait and hopf bifurcation and limit cycle of it . then studied the probability distribution function of them , and the probabilistic equation of this system 最后建立了四川大学硕士毕业论文创新技术和旧技术的技术更替模型，并运用系统动力学的方法分析了扩散系统在其不动点附近的变化特征和相图以及改进系统的hopf分支、极限环等性质，讨论了新旧技术的概率分布，并且将动力学方程转化为概率方程进行分析。
First this paper expatiates the hierarchical protocol architecture of bluetooth ? technology , introduces and analyses bluetooth ? radio frequency , link controller and baseband , link management protocol , logical link control and adaption protocol , service discovery protocol , rfcomm and so on , which illuminates the characteristics and applied conditions . in the second section i summarize the developing history , characteristics and class of fieldbus technology 本文首先全面阐述了蓝牙技术的分层协议体系结构，对蓝牙射频、链路控制器和基带、链路管理协议、逻辑链路控制和适配协议、服务发现协议、 rfcomm等协议进行了详细的介绍和分析，说明了蓝牙技术的技术特点及其适用环境。
