Adverb
at the beginning
Source: WordNetBecause of recent improvements in the accuracy of theoretical predictions based on large scale ab initio quantum mechanical calculations, meaningful comparisons between theoretical and experimental findings have become possible. Yuan T. Lee
at first he didn't notice anything strange Source: Internet
All constants appearing in the equations must be obtained beforehand from experimental data or ab initio calculations. Source: Internet
Both ab initio and semi-empirical approaches involve approximations. Source: Internet
De novo or ab initio techniques for computational protein structure prediction are related to, but strictly distinct from experimental studies of protein folding. Source: Internet
Diagram illustrating various ab initio electronic structure methods in terms of energy. Source: Internet