解决实际问题
solving practical problems
北京师范大学中国农民问题研究中心
China’s Peasantry Issues Center
beijing normal university
财经问题研究
Research on Financial and Economic Issues
弹性杆系问题研究
A Study on the Elastic Bar System Problem
歌唱音准问题研究
study on singing intonation
哈巴河县贫困问题研究
The Research of Habahe County Poverty Problem
集体土地抵押问题研究
A Study on the Mortgage of Collective Land
南京农业大学中国土地问题研究中心
China Center for Land Policy Research
nanjing agricultural university
nanjing agriculture university
Center for China’s Land Policy Research
农业科技创新问题研究
Research on Agricultural Technology Innovation
奇异线性二次指标最优控制问题LQ问题
singular linear quadratic LQ problem