期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Risk of Unemployment In the AI Age
1
作者 Lan Xinzhen 《Beijing Review》 2018年第5期48-48,共1页
One year after the opening of the first cashier-free supermarket in China in 2016,most Chinese cities now have this kind of supermarket.While self-service stores make it more convenient for consumers,they also pose ri... One year after the opening of the first cashier-free supermarket in China in 2016,most Chinese cities now have this kind of supermarket.While self-service stores make it more convenient for consumers,they also pose risks to cashiers,whose jobs may thus vanish. 展开更多
关键词 In Risk of Unemployment In the ai age ai
原文传递
Preliminary study on the erratic exposure ages of Grove Mountains,East Antarctica
2
作者 李广伟 刘小汉 +4 位作者 黄费新 孔屏 Fink David 韦利杰 方爱民 《Chinese Journal of Polar Science》 2009年第1期15-21,共7页
The first study of erratic boulder exposure ages in the Grove Mountains, interior Antarctica, indicates the two erratic boulders (060131-1 and 060131-2, collected from a typical nunataks, Zakharoff Ridge in the Grove... The first study of erratic boulder exposure ages in the Grove Mountains, interior Antarctica, indicates the two erratic boulders (060131-1 and 060131-2, collected from a typical nunataks, Zakharoff Ridge in the Grove Mountains) have 10 Be minimum exposure ages of 1.24 ±0. 11 Ma, 1.37 ±0. 12 Ma, and ^26Al ages of 0.90 ±0.12 Ma,0.44 ±0.04 Ma, respectively. Meanwhile, another erratic boulder sample 060131-4, coming from vicinal ice surface, has ^10Be and ^26Al minimum exposure ages of 0.47 ±0.3 Ma and 0. 44 ±0.04 Ma, respectively. The exposure ages of the three erratic boulders are nearly similar to the bedrocks with the similar elevation. Thus, using the technique of in situ produced terrestrial cosmogenic nuclides, the ice sheet evolution histories in the Grove Mountains reflected by erratic boulder and bedrock exposure ages are basically consistent. 展开更多
关键词 East Antarctica Grove Mountains Zakharoff Ridge ^10 Be and ^26 ai exposure age erratic boulders.
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部