Keywords Real-Time Database, Mixed Real-Time Transaction, Aperiodic Transaction,Real-Time Transaction Scheduling, Real-Time Concurrency Control, Feedback Control,Deadline Miss Ratio, Schedulability;

• 实时数据库;混合实时事务;非定期事务;实时事务调度;实时并发控制;反馈控制;截止期错失率;可调度性;