准谐波振荡

数学英语 23 What are the Range and Standard Deviation?

by Jason Marshall Weve now talked about three methods for calculating average values: the mean, median, and mode (affectionately known as the three Ms). So, are we done? Is that everything we could ever want to know about interpreting average values?

发表于:2018-12-07 / 阅读(163) / 评论(0)

数学英语

SSS 2010-05-20

This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? Why do some chords sound sweet but others make you wince? Well it appears our earsor at least the ears of 250 Minnesota undergradsprefer chords containing harm

发表于:2018-12-24 / 阅读(161) / 评论(0)

Scientific American(五)月

优美音乐来自和谐的数学组合(有声)

Students who listened to different chords rated as more pleasing the ones that westerners think of as harmonious, the individual notes of which have definite mathematical relationships 【英文文本】 Why do some chords sound sweet but others make

发表于:2019-01-02 / 阅读(151) / 评论(0)

60秒科学

SSS 2011-10-05

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? The 2011 Nobel Prize in chemistry goes to Daniel Schechtman of the TechnionIsrael Institute of Technology in Haifa. Schechtman discovered what are called quasicrystals.

发表于:2019-01-08 / 阅读(236) / 评论(0)

Scientific American(十)月

VOA标准英语2010年-Catherine Russell Releases Blues Influ

Vocalist Catherine Russell is always searching for that next great melody. She's found more than a dozen of them to sing on her latest album, Inside This Heart Of Mine. Catherine Russell is a perfectionist when it comes to choosing her material. Her

发表于:2019-02-06 / 阅读(154) / 评论(0)

VOA标准英语2010年(六)月

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a.-tr.

Aberystwyth

accension

advanced surface missile system (asms)