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We present a model-fit pipeline to determine the stellar parameters of M-typedwarfs, which is an improvement upon our previous work described in Hejazi etal. 2020. We apply this pipeline to analyze the low-resolution (R~2000) spectraof 3745 M dwarfs/subdwarfs, collected at the MDM Observatory, Lick Observatory,Kitt Peak National Observatory, and Cerro Tololo Interamerican Observatory. Weexamine the variation of the inferred parameter values in the HR diagramconstructed from their Gaia Early Data Release 3 (EDR3) parallaxes and opticalmagnitudes. We also study the distribution of our stars in the abundancediagram of [alpha/Fe] versus [M/H] and inspect the variation of theirmetallicity class, effective temperature, and surface gravity as well as theirGalactic velocity components U, V, and W in this diagram. In addition, theanalyses of the stars' projected motions in the two-dimensional UV, VW, and UWplanes and the variation of their chemical parameters in these planes, and alsotheir distribution in the abundance-velocity diagrams are important parts ofthis study. The precision of our model-fit pipeline is confirmed by the clearstratification of effective temperature and chemical parameters in the HRdiagram, the similarity of the stars' distribution in the [alpha/Fe] versus[M/H] diagram and in the metallicity-velocity planes with those from otherstudies, revealing substructure in the abundance-velocity diagrams, andchemical homogeneity between the components of a set of binary systems.

Chemical Properties of the Local Disk and Halo. II. Abundances of 3745 M dwarfs and Subdwarfs from Improved Model Fitting of Low-Resolution Spectra