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443708933木蟲 (著名寫手)
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[求助]
Fortran中計算多重積分的VEGAS程序變量
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IDUM=-1 NCALL=200000 ITMAX=100 NPRN=0 YVM=0. SD=0. CHI2A=0. INIT=-1 CALL VEGAS(REG,6,F,INIT,NCALL,ITMAX,NPRN,YVM,SD,CHI2A) INIT=1 CALL VEGAS(REG,6,F,INIT,NCALL,ITMAX,NPRN,YVM,SD,CHI2A) 一般的 VEGAS程序算多重積分中 SD,和CHI2A代表什么? SD是精度,CHI2A是投點區(qū)間? 為什么CHI2A的值接近1時,積分值才可信? [ Last edited by 443708933 on 2013-7-1 at 14:50 ] |
鐵桿木蟲 (著名寫手)
工程和科學數(shù)值計算咨詢
| SD represents standard deviation, and chi2a is χ2 per degree of freedom, an indicator of whether consistent results. Ref. Numerical Recipes under Random Numbers. |
金蟲 (職業(yè)作家)

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