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Figure 1.

The general form of MAML model
The general form of MAML model

Figure 2.

Improved MAML model
Improved MAML model

Figure 3.

Category 1 - 4, the experimental test dataset
Category 1 - 4, the experimental test dataset

Figure 4.

Category 5 - 12, the pre-training dataset
Category 5 - 12, the pre-training dataset

Figure 5.

All incident angles of a model
All incident angles of a model

Figure 6.

Schematic diagram of incidence angle
Schematic diagram of incidence angle

Figure 7.

RCS data of 85CM category 3 model in Cartesian coordinate system
RCS data of 85CM category 3 model in Cartesian coordinate system

Figure 8.

ResNet 18-layers
ResNet 18-layers

Figure 9.

LSTM
LSTM

Figure 10.

MAML
MAML

Figure 11.

MAML-New
MAML-New

Comparative experimental results of different models

Accuracy\Model Category 1 Accuracy Category 2 Accuracy Category 3 Accuracy Category 4 Accuracy Average accuracy
MAML 82.16% 72.45% 81.3% 85.97% 80.47%
MAML-New 86.42% 79.70% 87.17% 89.19% 85.62%
ResNet 18-layers 81.7% 62.1% 82.4% 90.1% 73.45%
LSTM 81.1% 68.0% 80.8% 80.3% 77.55%

Partial network parameter values for MAML and MAML-New

Parameter Value Meaning
epoch 600 Training epochs
k 4 Number of sample categories
k_spt 20 Number of support set samples
k_qry 30 Number of query set samples
imgsz 180 Dimension of input data
imgc 1 Number of channels for input data
task_num (batch_size) 16 Training batch of samples
meta_lr 1e-3 First gradient update learning rate
update_lr 0.01 Second gradient update learning rate
eISSN:
2470-8038
Language:
English
Publication timeframe:
4 times per year
Journal Subjects:
Computer Sciences, other