COMSOL中的函数表达

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1、MathematicalFunctionsTABLE3-4:MATHEMATICALFUNCTIONSFUNCTIONDESCRIPTIONSYNTAXEXAMPLEabsAbsolutevalueabs(x)acosInversecosine(inradians)acos(x)acoshInversehyperboliccosine(inradians)acosh(x)acotInversecotangent(inradians)acot(x)acothInversehyperboliccotangent(i

2、nradians)acoth(x)acscInversecosecant(inradians)acsc(x)acschInversehyperboliccosecant(inradians)acsch(x)argPhaseangle(inradians)arg(x)asecInversesecant(inradians)asec(x)asechInversehyperbolicsecant(inradians)asech(x)asinInversesine(inradians)asin(x)asinhInver

3、sehyperbolicsine(inradians)asinh(x)atanInversetangent(inradians)atan(x)atan2Four-quadrantinversetangent(inradians)atan2(y,x)atanhInversehyperbolictangent(inradians)atanh(x)besseljBesselfunctionofthefirstkindbesselj(a,x)besselyBesselfunctionofthesecondkindbes

4、sely(a,x)besseliModifiedBesselfunctionofthefirstkindbesseli(a,x)besselkModifiedBesselfunctionofthesecondkindbesselk(a,x)ceilRounduptonearestintegerceil(x)conjComplexconjugateconj(x)cosCosinecos(x)coshHyperboliccosinecosh(x)cotCotangentcot(x)cothHyperboliccot

5、angentcoth(x)cscCosecantcsc(x)cschHyperboliccosecantcsch(x)epsFloatingpointrelativeaccuracyepserfErrorfunctionerf(x)expExponentialexp(x)floorRounddowntonearestintegerfloor(x)gammaGammafunctiongamma(x)i,jImaginaryunitiimagImaginarypartimag(u)infInfinityinflog

6、Naturallogarithmlog(x)log10Commonlogarithm(base10)log10(x)log2Base-2logarithmlog2(x)maxMaximumoftwoargumentsmax(a,b)minMinimumoftwoargumentsmin(a,b)modModulooperatormod(a,b)NaN,nanNot-a-numbernanpiPipipsiPsifunctionanditsderivativespsi(x,k)rangeCreatearangeo

7、fnumbersrange(a,step,b)realRealpartreal(u)roundRoundtoclosestintegerround(x)secSecantsec(x)sechHyperbolicsecantsech(x)signSignumfunctionsign(u)sinSinesin(x)sinhHyperbolicsinesinh(x)sqrtSquarerootsqrt(x)tanTangenttan(x)tanhHyperbolictangenttanh(x)