【摘要】 分析山东省 1989年以来PRED各子系统及总系统的发展状况和趋势 ,并对各系统之间进行相关分析 ,最后提出协调山东省PRED系统以达到其可持续发展的方法和措施更多还原

【Abstract】 By the simple mathematical calculation, the author analyze the developmental situation and tendency of PRED system and subsystems in Shandong Province since 1989, and they also study the relations among its subsystem, put forward some measures and ways to harmonize the PRED system so as to realize the sustainable development of PRED system in Shandong.更多还原