搜索优化
English
全部
搜索
图片
视频
地图
资讯
Copilot
更多
购物
航班
旅游
笔记本
Top stories
Sports
U.S.
Local
World
Science
Technology
Entertainment
Business
Politics
时间不限
过去 1 小时
过去 24 小时
过去 7 天
过去 30 天
最佳匹配
最新
资讯
生物通
21 天
技术创新如何驱动矿业能源与环境效率的收敛效应 ...
为解决中国矿业能源效率区域差异大、环境问题突出的问题,Runqing Zhu和Boqiang Lin基于2004-2019年省级面板数据,采用非参数NDDF方法测度矿业能源环境效率(EEE),运用Log-t回归和俱乐部收敛模型识别出三大收敛集群,并发现技术创新(TI)和环境规制能显著促进效率收敛。研究为制定差异化政策提供了 ...
当前正在显示可能无法访问的结果。
隐藏无法访问的结果
今日热点
Omaha basketball player dies
Troops battle Spain fires
Terence Stamp dies at 87
Zelenskyy arrives in DC
Howell wins US Amateur
68 arrested overnight in DC?
ATV assault on officer arrest
Teen drowns at NJ beach
Dan Tana dies at 90
Halts Gaza visitor visas
Yeldon arrested in Alabama
Russia strikes Kharkiv
Captures title at UFC 319
Suit vs. Confederate statue
Boat capsizes in Nigeria
'General Hospital' star dies
Reds place Burns on IL
To visit Mexico in September
NYC shooting kills three
ESPN will not air docuseries
To join EU leaders in WA
NATO-style security OK'd
Suffers chest contusion
To undergo wrist surgery
Air Canada halts restart
Del Records CEO sentenced
Northern China flash floods
HOF ring stolen in burglary
2 drown at cruise resort
WV gov. to deploy troops
Wins major league debut
反馈