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. 2022 Apr 7;12:5892. doi: 10.1038/s41598-022-09937-9

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Phase portraits under three different impact forces. (a) Phase portraits under the impulse of 10 kgm/s. (b) Phase portraits under the impulse of 30 kgm/s. (c) Phase portraits under the impulse of 45 kgm/s.