Two cases of emphysematous pyelonephritis

Kim, J K; Yoon, I H; Chung, Y K; Nah, Byung-Sik; Chung, Hyunwoo

doi:10.3348/jkrs.1985.21.6.1012

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Coherences Of Fluctuating Wind Speed [1]1

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2014

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“…1 shows a comparison of various coherence formulas applied to wind tunnel data. Among them, the coherence formula proposed by Kim (2009) shows the best agreement with wind tunnel data. Other existing coherence formulas are presented in Table 1.…”

Section: ( ) ( ) ( ) ( )mentioning

confidence: 97%

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Coherence of Fluctuating Wind Speed and Along-Wind Force Power Spectrum of Tall Building

Kim¹,

Yoon

2014

AMR

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In evaluating wind load effects on large-scale structures, correlations in the frequency domain (i.e., coherences) and power spectra of fluctuating wind speed should be evaluated in advance. Most existing formulas for coherence are expressed as exponential functions based on field measurement data for ease of mathematical treatment. However, these simple mathematical expressions have many limitations. In the present study, after examining the existing coherence formulas, a semi-theoretical formula was proposed, and the corresponding along-wind force power spectrum of a tall building with a square cross-section was numerically calculated. A comparison showed that both the coherence and along-wind power spectrum were in good agreement with those of actual wind tunnel data.

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Section: ( ) ( ) ( ) ( )mentioning

confidence: 97%

“…To address this point, semi-theoretical formulas were proposed by Kanda (1978), who introduced the modified frequency term n * shown in Eq. 4, and by Kim (2009), who introduced the normalized distance term r * and normalized frequency term n * , as shown in Eq. 5.…”

Section: Coherences Of Fluctuating Wind Speed [1]mentioning

confidence: 99%