摘要: In this Chapter, the technique of semi-analytic models galaxy formation is described. I focus in GALFORM model and summarise aspects cosmology that are most relevant to calculation describe all baryonic mechanisms included model. These include: (i) collapse merging dark matter halos, (ii) shock-heating radiative cooling gas inside leading galatic disks, (iii) quiescent star (iv) feedback from supernovae, active galactic nuclei photo-ionisation intergalactic medium, (v) chemical enrichment stars gas, (vi) mergers driven by dynamical friction within common which can trigger bursts lead spheroids. what was state-of-the-art before development PhD thesis, largely improves treatment supernovae feedback.