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When the Galactic Cosmic Rays (GCRs) entering the heliosphere, they encounterthe solar wind plasma, and their intensity is reduced, so-called solarmodulation. The modulation is caused by the combination of a few factors, suchas particle energies, solar activity and solar disturbance. In this work, a 2Dnumerical method is adopted to simulate the propagation of GCRs in theheliosphere with SOLARPROP, and to overcome the time-consuming issue, themachine learning technique is also applied. With the obtained proton localinterstellar spectra (LIS) based on the observation from Voyager 1 and AMS-02,the solar modulation parameters during the solar maximum activity of cycle 24have been found. It shows the normalization and index of the diffusioncoefficient indeed reach a maximal value in February 2014. However, aftertaking into account the travel time of particles with different energies, thepeak time was found postponed to November 2014 as expected. The nine-month lateis so-called time lag.

A New Scenario of Solar Modulation Model during the Polarity Reversing