Journal Article machine learning reflectometry X-ray reflectivity data analysis Faster R-CNN GIWAXS GenX Python Review X-ray diffraction XRR atomic force microscopy autonomous experiments beamline control closed-loop control convolutional neural networks deep learning grazing-incidence X-ray diffraction grazing-incidence wide-angle X-ray scattering inverse problems morphology neural networks neutron scattering organic semi-conductors organic semiconductors peak detection polymorphism reciprocal space mapping soft matter