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  • Junior Achievement (JA) 是个怎样的组织? - 知乎
    JA是全球最大的致力于青少年职业、创业和理财教育的非营利教育机构。 JA遍布全球100多个国家,每年有1,000多万学生接受JA的教育。
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  • 请问怎么判断一个学术会议的论文是否被EI检索? - 知乎
    首先我们需要了解一下什么是EI? EI是一个数据库,工程领域的权威数据库。EI主要收录EI会议、CA以及EI期刊、JA类型的文章。 如何判断论文被真正的EI收录? 在检索论文是否被EI数据库收录时,点开EI检索平台,不挑选数据库,就直接输入检索词,如有结果就认为文章被EI数据库收录了,其实不然
  • 有没有大神可以把力矩的物理意义讲清楚? - 知乎
    谢邀, 这里从物体 (刚体)的转动说起。 如果看得累,可以至少看完第一 、第二部分~ 一、物体转动与力矩的关系 首先, 物体的运动有平动 (Translational Motion)和转动 (Rotational Motion)。比如,在斜面上推动一滑块,则该滑块为平动;开门时门绕定轴转,则为该门为转动。 物体平动时有 位移 x ,转动
  • 什么EI?什么是EI会议? EI和EI会议的区别? - 知乎
    能够被EI(JA)检索的就是EI源刊,能够被EI(CA)检索的就是EI会议。 EI会议,两极分化很严重,有顶刊特别牛的这种,也有那种给钱就发,毫无难度的水货。
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