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
More
Politics
过去 30 天
时间不限
过去 1 小时
过去 24 小时
过去 7 天
最新
最佳匹配
生物通
27 天
花旗松(Douglas-fir)静态与动态弹性模量测试:压缩、弯曲及阻尼 ...
本研究针对花旗松(Douglas-fir)这一重要天然纤维增强复合材料,通过静态(压缩、三点弯曲)与动态(阻尼振动)方法系统测定其弹性模量,发现动态模量显著高于静态值(如纵向-径向动态模量达15.3 GPa),揭示了木材在高速变形下的刚度增强效应,为建筑 ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果
今日热点
SCOTUS halts SNAP pay
Senate passes funding bill
Taiwan evacuates thousands
Trump on H-1B visas
Halts intelligence sharing
Former NBA star dies at 70
'Mellon Blue' diamond auction
Pulls two gay dating apps
Sally Kirkland dies
Trump pardons husband
Recalls all products
FIDE files complaint
Hit with power outage
G7 ministers meet in Canada
Sues China-based hackers
Cleto Escobedo III dies
Brown pleads not guilty
Launches bid for Congress
Thailand extradites suspect
AU's top court blocks Russia
Undergoes knee surgery
Exits game with injury
To strengthen cooperation
Italian pasta tariff
KS county to pay $3M
DOJ to probe Berkeley protests
Makes comeback bid in VA
Justice minister suspended
反馈