The Research on the Analysis Tool and Technology for the Petri Net-based Network Protocol
With the studying on the techniques and tool of the Petri Nets based network protocol specifications and analyses,the paper analyzes the demands of the P/T Net based analyzer and designs the human machine form.Then the paper outlines the algorithms and the ideas of main function modules.When describing,analyzing and testing a P/T net example about the AB network protocol with the protocol analyzer,the protocol analyzer is proved to be effective.
Abstract The results of the Tennessee study and the recent Brookings consensus statement present a moment for the field to reflect collectively on the preschool evidence base writ large and on what should come next. In this brief commentary, I review the broader preschool literature and offer seven specific takeaways regarding what we know about public preschool programs and about how to improve them. I argue that making progress requires a pivot in the field to specifically how to create new high-quality programs and improve existing ones. I offer specific directions for policy, practice, and research aimed at guiding this pivot.