Moving‐Strip Fourier Analyzer
作者： H. J. Grenville‐Wells
DOI: 10.1063/1.1770971
关键词: Type (model theory) 、 Fourier transform 、 Spectrum analyzer 、 Electron density 、 STRIPS 、 Projection (set theory) 、 Sine 、 Mathematical analysis 、 Physics 、 Instrumentation (computer programming)
摘要: A device embodying Robertson's principle of movable strips is described for performing two‐dimensional Fourier summations the type ΣHΣKF(hk)[cos2π(hX+kY)] without first rearranging them in form ΣHΣKF(hk)[cos2πhX·cos2πkY−sin2πhX·sin2πkY]. The same can be used to evaluate sine and some three‐dimensional directly. electron density readily calculated at selected individual points projection. Summations also completed by means masks. operation device, which accomodate values F(hk) = ± (1 99), h= −15 +15, k=0 15 X, Y 1/36 repeat distance, described, illustrated an example.
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sci-hub.se 参考文章(4)
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