搜索优化
English
搜索
Copilot
图片
视频
地图
资讯
购物
更多
航班
旅游
酒店
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
按相关度排序
按时间排序
科学网
1 天
To build a To build a global virtual community for Chinese-speaking scientists
ScienceNet.cn is co-sponsored by Chinese Academy of Sciences (CAS), Chinese Academy of Engineering (CAE) , National Natural Science Foundation of China (NSFC) and China Association for Science and ...
腾讯网
20 小时
高场超导磁体技术及其应用︱超导材料及其应用专栏
目前,超导磁体在风力发电中主要有两方面的应用:风力发电机以及超导磁储能。对于风力发电机,当超导磁体的磁场提高以后,磁力线切割导体将产生更高的感应电动势,从而可以提高发电机整体的输出功率,或大幅减小发电机的体积。由于自然风力资源在时间尺度上分布极不均匀,为了保证电功率输出的稳定性,可以利用储能系统进行动态调节。更高的磁场强度,可以有效提升超导磁储能系统的储能密度,实现储能总量不变的前提下提高系统的紧 ...
9 天
一颗您从未听说过的间谍卫星帮助赢得了冷战
1970 年代初 ...
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
6 Mexicans killed in crash
Black boxes recovered
Trump fires CFPB director
Bans DeepSeek, RedNote
Ends abortion travel policy
Drone pilot to plead guilty
Boy, 5, dies in explosion
Judge blocks funding freeze
Russian attacks in Ukraine
Dismisses suit against CNN
CA's largest fires contained
Gold hits all-time high
WBD hit with copyright suit
Jan. 6 prosecutors fired
Ex-Fed advisor arrested
New York doctor indicted
Hamas releases 3 hostages
TN settles suit with NCAA
Venezuela frees 6 Americans
Recuses self from Act 10 suit
Suspends dividend
Martin elected DNC chair
US inflation ticked higher
Costco, Teamsters reach deal
Ex-German president dies
Opens probe into NPR, PBS
Receives $250K settlement
Tour boat captain sentenced
To again run for Senate?
Seeking a new trial
Cancerous tumor removed
Apologizes for old tweets
反馈