Table 17 Comparison of the effectiveness of dynamic adjustment Strategies.

From: A spatio-temporal graph diffusion and federated contrastive learning framework for cross-institutional educational evaluation

Policy type

F1 score

Resource utilization rate

PLR

Optimization suggestion adoption rate

Response delay

High frequency aggregation (every 30 min)

0.875 ± 0.018

92.3 ± 1.2

0.15 ± 0.02

89.7 ± 1.1

1,850 ± 95

Mid frequency aggregation (every 2 h)

0.862 ± 0.020

85.4 ± 1.5

0.12 ± 0.02

82.4 ± 1.8

1,550 ± 75

Low frequency aggregation (every 6 h)

0.841 ± 0.022

78.9 ± 1.8

0.09 ± 0.01

76.2 ± 2.1

1,220 ± 65

Adaptive Aggregation (Eq. 17)

0.893 ± 0.021

94.7 ± 0.9

0.18 ± 0.03

92.1 ± 0.9

2,150 ± 105

Fixed privacy budget (ε=1.5)

0.848 ± 0.019

88.2 ± 1.3

0.12 ± 0.02

85.3 ± 1.4

1,780 ± 85

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