human 94 structural equation modeling 68 article 67 Nonlinear equations 59 Ordinary differential equations 59 Humans 58 Numerical methods 48 female 46 male 41 Differential equations 37 adult 37 Navier Stokes equations 34 Partial differential equations 33 Equations of state 30 Female 30 Structural equation modeling 29 controlled study 29 Male 27 Article 26 Equations of motion 26 Integral equations 25 Adult 24 human experiment 24 major clinical study 23 Structural equation modelling 22 Kinetics 21 Nanofluidics 19 Finite difference method 18 Friction 18 Iterative methods 18