Study Of Computer Aided Automatically Singed Directed Graph Modeling Based On Piping & Instrument Diagram

The petroleum chemical engineering profession is a profession to exist high danger. Science technique and economy is in the fast development now .The petroleum chemical engineering process become more and more huge and complicacy .If the occurrence a fire, Bang, poisonous gas leaks the important trouble etc. in these realm, disaster will very serious . Prevent hazard, protect the personnel, supplies with the equipments safety and environment alism , these were valued by a lot of nations .Many nations established the safety law in 80's.China promulgated the NATIONAL SECURITY PRODUCES AND TECHNOLOGY DEVELOPMENT PROGRAMMING (2004-2010),in 2003 December .This article emphasized the safe problem in process .This article emphasized to use the SDG technique in fields of Process Hazard Assessment and Fault Diagnosis.The fast development of computer hardware and software which...