奇异线性二次指标最优控制问题LQ问题
singular linear quadratic LQ problem
防治煤与瓦斯突出问题
Prevention against coal and gas blasting
函数发现问题
Status quo of ecological environmental geological
生态环境地质问题现状与治理
Current Situation of World Food Security
问题现象
behavioral problems status
音声问题
frequently asked question
Frequently asked questions
FAQ