Research on Food Security Risk Assessment and Early Warning in China Based on BP Neural Network Model

Table 10

GBR simulation values.

Year	Actual value	Simulation value	Simulation effect
2016	0.59172	0.591044	99.89%
2017	0.619918	0.573438	96.91%
2018	0.574006	0.587326	97.73%
2019	0.552851	0.560871	98.57%