装备预研中国电科联合基金开放课题(6141B08231110a)
装备预研重点实验室基金项目(61425040104)
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Figure 1
Intention representation and prediction process of air combat target
Figure 2
Intention prediction workflow of UAV air combat
Figure 3
(Color online) Air combat situation. (a) Advantage of our side; (b) advantage of the enemy;protect łinebreak (c) neutrality between the two sides; (d) balance of power between the two sides
Figure 4
Characteristic description tree chart of UAV air combat intention prediction
Figure 5
Framework of UAV air combat intention prediction model
Figure 6
Flow chart of air combat data repairing
Figure 7
Intention coding and pattern analysis
Figure 8
Fitting curve of distance in the case that some distance values are missing at some time points
Figure 9
(Color online) Recognition accuracy of training set and test set
Figure 10
(Color online) Comparison of different recognition models
Air combat situation  Most possible target intention  Secondary possible operational intention 
Advantage of the enemy  Attack  Surveillance 
Advantage of our side  Defense  Penetration, electronic interference 
Balance of power between the two sides  Feint  Attack, defense, electronic interference 
Neutrality between the two sides  Reconnaissance  Electronic interference 
初始化参数$\theta~$, 初始化一阶和二阶矩变量${m_0}$, ${v_0}$, 初始化时间步长$t~=~0$; 

从训练集中采包含$m$个样本$X' = \left\{ {{x_1},{x_2}, \ldots ,{x_m}} \right\}$和其对应的${\hat y_{x'}}$标签集合; 
计算梯度: ${g_{t~+~1}}~=~\frac{1}{m}{\nabla~_\theta~}\sum\nolimits_i~{L\left(~{f\left(~{{x_i};{\theta~_t}}~\right),{y_{{x_i}}}}~\right)}~$; 
$t~=~t~+~1$; 
更新有偏一阶矩估计: ${m_t}{\rm{~=~}}{\beta~_1}~\cdot~{m_{t~~1}}~+~\left(~{1~~{\beta~_1}}~\right)~\cdot~{g_t}$; 
更新有偏二阶矩估计: ${v_t}~=~{\beta~_2}~\cdot~{v_{t~~1}}~+~\left(~{1~~{\beta~_2}}~\right)~\cdot~g_t^2$; 
修正一阶矩的偏差: ${\hat~m_t}~=~{m_t}/\left(~{1~~\beta~_1^t}~\right)$; 
修正二阶矩的偏差: ${\hat~v_t}~=~{v_t}/\left(~{1~~\beta~_2^t}~\right)$; 
更新参数: ${\theta~_t}~=~{\theta~_{t~~1}}~~\alpha~~\cdot~{\hat~m_t}/\left(~{\sqrt~{{{\hat~v}_t}}~~+~\varepsilon~}~\right)$; 

Time point  Distance between two sides (km)  Time point  Distance between two sides (km)  Time point  Distance between two sides (km) 
1  6.14  5  4.76  9  5.77 
2  5.90  6  4.67  10  5.88 
3  5.72  7  4.97  11  6.08 
4  5.32  8  5.47  12  6.25 
Data missing  Model recognition  Data missing  Model recognition 
0  94.12  40  84.85 
10  93.53  50  73.76 
20  92.78  60  60.57 
30  90.69  70  46.67 
Recognition rate of  Test recognition  Recognition rate of  Test recognition 
training set  rate  training set  rate 
98.16  94.30  98.62  93.95 
98.12  93.91  98.06  93.89 
98.54  94.11  98.10  94.06 
98.57  93.91  98.12  94.26 
98.47  94.12  98.42  94.21 