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全部话题 - 话题: r2c
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i*********5
发帖数: 19210
1
just did a search, and found SRAM has a set of new TT shifters called RTC (
Return to Center) Aero shifters:
http://www.sram.com/sram/road/products/r2c-aero-shifters
New SRAM R2C Aero shifters: innovative shifting.
Features, that only Formula One drivers could enjoy, are now available for
the best Triathletes and Time Trial specialists in the world: Michellie
Jones, Chris Lieto, Lance Armstrong and Fabian Cancellara.
No need to bend your hands anymore, SRAM’s new R2C (Return to Center) bar-
end... 阅读全帖
m*****k
发帖数: 58
2
来自主题: Computation版 - 关于 fftw 的问题
我用的是c语言版的fftw3, 可能会不一样.
r2c 是有hermite symmetry. f(-k) = f(k)*, 它的相位是[0, 2\pi*(N-1)/N], r2c 就
会有f(n) = f(N-n). fftw偷懒, 只存了一半的系数, 后一半全是0, 不会有 (0,20,40
)这样的mode.可能是你的计数方式搞错了吧.
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