  Using a series of cosmological simulations that includes one dark-matter-only
(DM-only) run, one gas cooling-star formation-supernovae feedback (CSF) run and
one that additionally includes feedback from active galactic nuclei (AGNs), we
classify the large-scale structures with both a velocity-shear-tensor code
(Vweb) and a tidal-tensor code (Pweb). We find that the baryonic processes have
almost no impact on large-scale structures -- at least not when classified
using aforementioned techniques. More importantly, our results confirm that the
gas component alone can be used to infer the filamentary structure of the
Universe practically un-biased, which could be applied to cosmology constrains.
In addition, the gas filaments are classified with its velocity (Vweb) and
density (Pweb) fields, which can theoretically connect to the radio
observations, such as HI surveys. This will help us to bias-freely link the
radio observations with DM distributions at large scale.
