搜索结果: 1-2 共查到“数学 wood”相关记录2条 . 查询时间(0.109 秒)
Signatures of surface bundles and Milnor Wood inequalities
Signatures of surface bundles Milnor Wood inequalities Geometric Topology
font style='font-size:12px;'>
2012/6/14
Let E be a surface bundle over a surface. We use a variant of the Milnor Wood inequality to show that $|3\sigma(E)|\leq \chi(E)$.
Productivity changes of the wood product manufacturing sector in the U.S.
Data Envelopment Analysis productivity change wood industry
font style='font-size:12px;'>
2010/9/10
The wood product manufacturing is one of the important manufacturing industries in the United
States. Similar to other manufacturing industries, it has been facing many challenges including
an incre...