The phrase "approximation of the time" is correct and usable in written English.
It can be used when you want to indicate an estimated or rough calculation of a specific time or duration.
Example: "The approximation of the time needed to complete the project is around three weeks."
Alternatives: "estimate of the time" or "rough calculation of the time".
I tap the neon button and the clock starts, comping me a reasonable approximation of the time it took for the Watch to be sure what sort of activity it was detecting.
Based on existing products core time drivers based on features are successively identified until an adequate approximation of the time for the current product is achieved.
The transfer function of the controlled system is modified by approximation of the time delay term by its Pade expansion or Taylor expansion in the numerator.
The combination of these methods is often complicated since hybridization requires a discrete approximation of the time derivative whereas with the MOL, it should remain continuous.
Moreover, we proposed methods of approximation of the time variation of cosmic ray data and allocation of anomalous changes occurring during periods of high solar activity.
The Grünwald-Letnikov formulation is frequently adopted in numerical algorithms because it inspires a discrete-time calculation algorithm, based on the approximation of the time increment through the sampling period.
Fermi's golden rule is the first-order approximation of the time-dependent quantum-mechanical perturbation theory.
The proposed method is based on algebraic approach of control design and a linear approximation of the time-delay term.
The viscoelastic behavior is modeled based on the Boltzmann integral and Prony series approximation of the time-dependent moduli.
This EDR is mainly to overcome the non-minimum phase zero generated by the first order Pade' approximation of the time-delay factor.
The approach involves the numerical solution, by power series approximation, of the time-varying Hamilton-Jacobi-Isaac equation and results in a nonlinear controller approximating the optimal tracking control law for a specified desired trajectory and cost function.
