Meteorological shipping route decision-making system based on BP neural network

Table 1. Ship parameters
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Table 1. Ship parameters
参数数值
类型多用途船
下水日期 1995.11.25
船长/m 148.7
型宽/m 22.7
型深/m 10.2
总吨/t 12 335
夏季载重/t 5 700
功率/kW 6 480×2
制动功率/kW 5 184×2

Table 2. The range of input and output variables of the BP neural network

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Table 2. The range of input and output variables of the BP neural network

变量	变量范围
变量	最小值	最大值
注：“−”表示不利于节省燃油。
船速/kn	14.3	18.5
主机转速/(r·min⁻¹)	480	510
平均吃水/m	5.5	6.2
吃水差/m	0.2	2.0
货物重量/t	313.110	2 588.34
风影响/kn^[21]	−39.0	35.0
海浪影响/m^[21]	−7.0	6.0
燃油消耗量/(t·h⁻¹)	0.77	2.52

Table 3. Weights and biases of the input layer and hidden layer

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Table 3. Weights and biases of the input layer and hidden layer

z	c_1i	c_2i	c_3i	c_4i	c_5i	c_6i	c_7i	w_i	b_1i	b₂
1	−0.732 1	−0.067 1	−0.512 9	0.789 4	−0.691 4	1.188 5	−0.459 1	−0.325 0	1.928 0	−0.315 0
2	−0.516 2	1.023 6	0.501 7	0.686 9	0.748 6	1.503 0	0.041 9	0.418 9	−1.319 8
3	−0.522 1	0.298 8	0.718 2	−1.002 0	0.818 7	−0.831 2	−0.235 0	−0.961 5	−1.211 4
4	0.988 8	1.412 0	0.694 1	0.573 1	−0.612 3	0.400 2	0.945 1	−0.398 7	0.821 6
5	0.010 2	0.005 9	1.456 3	−0.100 8	−1.391 3	0.100 8	−0.101 6	0.438 4	0.011 4
6	0.271 6	1.356 0	0.711 2	−0.891 5	0.519 8	−0.085 2	−0.291 5	0.598 1	−0.138 1
7	−0.698 7	−1.281 2	−0.508 1	−0.411 9	−0.598 1	1.427 4	−1.325 8	−0.681 0	−0.584 9
8	−0.416 6	1.258 9	−1.524 0	0.499 1	0.358 9	−1.698 7	−1.028 8	0.496 9	1.301 8
9	0.487 1	−0.401 1	0.816 5	1.601 8	0.644 9	0.348 9	0.818 5	0.591 6	1.692 1
10	−0.609 8	−0.498 7	0.319 8	0.998 7	−0.401 2	1.158 5	−0.801 2	0.511 8	−2.107 8

Table 4. Fuel consumption statistics results
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Table 4. Fuel consumption statistics results
参数最大最小平均 95%置信区间
上限下限
燃油消耗量/(t·h⁻¹) 2.521 0.768 1.321 1.258 1.384

Table 5. MSE and RMSE of BP neural network and MR
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Table 5. MSE and RMSE of BP neural network and MR
参数多元回归分析模型 BP神经网络
MSE 0.032 0 0.021 0
RMSE 0.178 9 0.144 9

Table 6. Ship fuel consumption statistics
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Table 6. Ship fuel consumption statistics
航速/kn 总航程/n mile 航行时间/h 平均燃油消耗量/(t·h⁻¹) 燃油消耗总量/t
15 412.41 27.49 1.327 36.48
17 426.56 25.09 1.484 37.24

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Daheng ZHANG, Yingjun ZHANG, Chuang ZHANG. Meteorological shipping route decision-making system based on BP neural network[J]. Chinese Journal of Ship Research, 2022, 17(4): 98

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