Mie.py 文件源码

python
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项目:PyMieScatt 作者: bsumlin 项目源码 文件源码
def SF_SD(m, wavelength, dp, ndp, minAngle=0, maxAngle=180, angularResolution=0.5, space='theta', angleMeasure='radians', normalization=None):
#  http://pymiescatt.readthedocs.io/en/latest/forward.html#SF_SD
  _steps = int(1+(maxAngle-minAngle)/angularResolution)
  ndp = coerceDType(ndp)
  dp = coerceDType(dp)
  SL = np.zeros(_steps)
  SR = np.zeros(_steps)
  SU = np.zeros(_steps)
  kwargs = {'minAngle':minAngle,
            'maxAngle':maxAngle,
            'angularResolution':angularResolution,
            'space':space,
            'normalization':None}
  for n,d in zip(ndp,dp):
    measure,l,r,u = ScatteringFunction(m,wavelength,d,**kwargs)
    SL += l*n
    SR += r*n
    SU += u*n
  if normalization in ['n','N','number','particles']:
    _n = trapz(ndp,dp)
    SL /= _n
    SR /= _n
    SU /= _n
  elif normalization in ['m','M','max','MAX']:
    SL /= np.max(SL)
    SR /= np.max(SR)
    SU /= np.max(SU)
  elif normalization in ['t','T','total','TOTAL']:
    SL /= trapz(SL,measure)
    SR /= trapz(SR,measure)
    SU /= trapz(SU,measure)
  return measure,SL,SR,SU
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