Article(id=1243301636920164936, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243301630683234768, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1007-7294.2025.01.002, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1721750400000, receivedDateStr=2024-07-24, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1774355809668, onlineDateStr=2026-03-24, pubDate=1737302400000, pubDateStr=2025-01-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1774355809668, onlineIssueDateStr=2026-03-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774355809668, creator=13701087609, updateTime=1774355809668, updator=13701087609, issue=Issue{id=1243301630683234768, tenantId=1146029695717560320, journalId=1240685776644648972, year='2025', volume='29', issue='1', pageStart='1', pageEnd='169', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1774355808181, creator=13701087609, updateTime=1774355986739, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1243302379672678863, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243301630683234768, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1243302379672678864, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243301630683234768, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=12, endPage=22, ext={EN=ArticleExt(id=1243301637180211796, articleId=1243301636920164936, tenantId=1146029695717560320, journalId=1240685776644648972, language=EN, title=Ship resistance prediction based on neural network, columnId=1241023037940748650, journalTitle=Journal of Ship Mechanics, columnName=Hydrodynamics, runingTitle=null, highlight=null, articleAbstract=
Conventional resistance prediction method of proxy models takes main scale ratios, ship form coefficients, and other similar parameters as inputs. Compared to CFD calculations, in which the complete hull form is used as input, prediction method with lower information density of proxy models results in lower prediction accuracy. In this paper, a high-dimensional, high-precision resistance prediction method was proposed for ship hulls using 4108 sets of complete hull geometry feature tensors as input and employing neural networks as proxy models. The total resistance coefficient of the ship was taken as the output. Dimensionless treatment of the hull forms was conducted at first and feature tensors were extracted as inputs. Next, a neural network model was constructed, comprising input layers, hidden layers, and an output layer. Finally, the feature tensors of the hull forms and the corresponding total resistance coefficients were fed into the neural network, and the model was trained using error back propagation until the loss function converges. The research findings in this paper can provide theoretical and technical support for high-dimensional proxy model-based resistance performance prediction.
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常规代理模型的阻力预报是以主尺度比、船型系数等作为输入,相比于CFD计算时输入完整船型,其较低的信息密度导致代理模型预报精度较低。本文以4108个完整船型几何形状特征张量作为输入,采用神经网络作为代理模型,以船舶的总阻力系数作为输出,研究船型阻力的高维度、高精度预报方法。首先,将船型进行无量纲化处理,并提取特征张量作为输入;然后,建立神经网络模型,搭建输入层、隐藏层和输出层;最后,将船型的特征张量与总阻力系数输入神经网络,通过误差反向传播进行训练,直至损失函数值收敛。本文研究结果可为基于高维代理模型的阻力性能预报提供理论和技术支持。
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引入完整船型特征和神经网络提升代理模型维度, figureFileSmall=Y67AnrHbXdmbi9UK0CKeLg==, figureFileBig=BRD7jQXXZ7gqmQXnM5mS0Q==, tableContent=null), ArticleFig(id=1243301646340572081, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Fig.2, caption=
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网络模型结构设计, figureFileSmall=0iKnY4ZDeY3rJ3hjr40d2g==, figureFileBig=Ab6Q+3+eAqNccblCFDswww==, tableContent=null), ArticleFig(id=1243301646525121473, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Fig.3, caption=
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模型栅格化, figureFileSmall=InFDrPVcAqHCztbYccjRig==, figureFileBig=U5jrf8AJ3CdA9zNJBwXWFw==, tableContent=null), ArticleFig(id=1243301646730642381, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Fig.4, caption=
Generating new ship designs based on 5415 parent vessel's linear deformation, figureFileSmall=+kOeM3hEqZx2/b+DhFY5lg==, figureFileBig=d7as92skKCm5fptRrwqAnw==, tableContent=null), ArticleFig(id=1243301648244786130, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=图4, caption=
基于5415母型船线性变形生成新船型, figureFileSmall=+kOeM3hEqZx2/b+DhFY5lg==, figureFileBig=d7as92skKCm5fptRrwqAnw==, tableContent=null), ArticleFig(id=1243301648362226654, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Fig.5, caption=
Variation range of main scale, figureFileSmall=os8mIETd0CGGiPIqWu7Q3w==, figureFileBig=sXRcpw3nlYKx3d89ylSyCQ==, tableContent=null), ArticleFig(id=1243301648462889958, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=图5, caption=
主尺度变化区间, figureFileSmall=os8mIETd0CGGiPIqWu7Q3w==, figureFileBig=sXRcpw3nlYKx3d89ylSyCQ==, tableContent=null), ArticleFig(id=1243301648580330477, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Fig.6, caption=
Grid of Vessel 5415, figureFileSmall=diaevaRHiuGTrAKV9F1DGw==, figureFileBig=RD4pJ8Oerdqz3exfzv1+TA==, tableContent=null), ArticleFig(id=1243301648676799476, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=图6, caption=
5415整体网格, figureFileSmall=diaevaRHiuGTrAKV9F1DGw==, figureFileBig=RD4pJ8Oerdqz3exfzv1+TA==, tableContent=null), ArticleFig(id=1243301648802628601, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Fig.7, caption=
Chart of free surface waveform, figureFileSmall=h/hIxS/3vTHpg3c+NNzSkg==, figureFileBig=WmhKwoxAhuHs2N3u9aFq8Q==, tableContent=null), ArticleFig(id=1243301648920069118, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=图7, caption=
自由液面波形图, figureFileSmall=h/hIxS/3vTHpg3c+NNzSkg==, figureFileBig=WmhKwoxAhuHs2N3u9aFq8Q==, tableContent=null), ArticleFig(id=1243301649041702918, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Fig.8, caption=
Iterative results of total drag, figureFileSmall=0fWI/bq6xVvDYpXN87Qajg==, figureFileBig=pyvueHn8wLc8n2djLAOpZQ==, tableContent=null), ArticleFig(id=1243301649142366216, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=图8, caption=
总阻力收敛曲线, figureFileSmall=0fWI/bq6xVvDYpXN87Qajg==, figureFileBig=pyvueHn8wLc8n2djLAOpZQ==, tableContent=null), ArticleFig(id=1243301649276583948, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Fig.9, caption=
Comparison between calculated results and those from Reference [13] for total drag, figureFileSmall=+QmdQDaO2xCFPKbw3EtopA==, figureFileBig=DIqEdcrvJht7ULtZaAnvbQ==, tableContent=null), ArticleFig(id=1243301649394024465, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=图9, caption=
总阻力计算对比图, figureFileSmall=+QmdQDaO2xCFPKbw3EtopA==, figureFileBig=DIqEdcrvJht7ULtZaAnvbQ==, tableContent=null), ArticleFig(id=1243301649519853590, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Fig.10, caption=
Flowchart of FCNN network testing process, figureFileSmall=WLT0CUwHLR5lAtqaQnDg8A==, figureFileBig=CuklUOo4i8j/ZiHuuIm2yw==, tableContent=null), ArticleFig(id=1243301649649877020, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=图10, caption=
FCNN网络测试流程图, figureFileSmall=WLT0CUwHLR5lAtqaQnDg8A==, figureFileBig=CuklUOo4i8j/ZiHuuIm2yw==, tableContent=null), ArticleFig(id=1243301649750540323, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Fig.11, caption=
FCNN network training loss iteration chart, figureFileSmall=pPAeTaRPAgQeTwtJdCDlpg==, figureFileBig=NYC0tbSzgiDnemUuLCR3OQ==, tableContent=null), ArticleFig(id=1243301649872175144, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=图11, caption=
FCNN网络训练损失迭代图, figureFileSmall=pPAeTaRPAgQeTwtJdCDlpg==, figureFileBig=NYC0tbSzgiDnemUuLCR3OQ==, tableContent=null), ArticleFig(id=1243301649993809968, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Fig.12, caption=
Total resistance iteration chart of ship modeling optimization, figureFileSmall=Z8BoegVm8X14Oy9sXilIxw==, figureFileBig=6rVXTfhO+zf8ggIgq+d0EQ==, tableContent=null), ArticleFig(id=1243301650132222004, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=图12, caption=
船舶建模优化总阻力迭代图, figureFileSmall=Z8BoegVm8X14Oy9sXilIxw==, figureFileBig=6rVXTfhO+zf8ggIgq+d0EQ==, tableContent=null), ArticleFig(id=1243301650220302392, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Fig.13, caption=
Free surface waveform before and after optimization, figureFileSmall=piFVgNq8Uy4WN0jK3nobRQ==, figureFileBig=uXQo6ZT9k6jCddtkDhHXOw==, tableContent=null), ArticleFig(id=1243301650312577083, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=图13, caption=
优化前后自由液面波形图, figureFileSmall=piFVgNq8Uy4WN0jK3nobRQ==, figureFileBig=uXQo6ZT9k6jCddtkDhHXOw==, tableContent=null), ArticleFig(id=1243301650463572033, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Tab.1, caption=
Key parameters of the 5415 vessel
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 符号/单位 | 数值 | 参数 | 符号/单位 | 数值 |
|---|
| 缩尺比 | Sr | 24.832 | 方形系数 | CB | 0.5060 |
| 垂线间长 | L/m | 5.72 | 傅如德数 | Fr | 0.28 |
| 吃水 | T/m | 0.372 | 雷诺数 | Re | 12 600 000 |
| 湿表面积 | SDWL/m2 | 4.861 | 设计航速 | V/(m•s-1) | 2.096 |
), ArticleFig(id=1243301650614566983, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=表1, caption=
5415船舶主要参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 符号/单位 | 数值 | 参数 | 符号/单位 | 数值 |
|---|
| 缩尺比 | Sr | 24.832 | 方形系数 | CB | 0.5060 |
| 垂线间长 | L/m | 5.72 | 傅如德数 | Fr | 0.28 |
| 吃水 | T/m | 0.372 | 雷诺数 | Re | 12 600 000 |
| 湿表面积 | SDWL/m2 | 4.861 | 设计航速 | V/(m•s-1) | 2.096 |
), ArticleFig(id=1243301650723618893, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Tab.2, caption=
Ship dataset
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| 序号 | Fn | L/B | B/T | L/T | … | 4108 |
|---|
| 0 | 0.28 | 3.7168 | 4.3116 | 16.0259 | … | 0 |
| … | | | | | | |
| 10 | 0.28 | 3.5361 | 4.3116 | 15.2467 | … | 0 |
| … | | | | | | |
| 100 | 0.28 | 3.7590 | 4.2025 | 15.7974 | … | 0 |
| … | | | | | | |
| 500 | 0.28 | 3.5361 | 4.2025 | 14.8607 | … | 0 |
| … | | | | | | |
| 999 | 0.28 | 3.8674 | 4.0987 | 15.8518 | … | 0 |
), ArticleFig(id=1243301650828476496, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=表2, caption=
船型数据集
, figureFileSmall=null, figureFileBig=null, tableContent=
| 序号 | Fn | L/B | B/T | L/T | … | 4108 |
|---|
| 0 | 0.28 | 3.7168 | 4.3116 | 16.0259 | … | 0 |
| … | | | | | | |
| 10 | 0.28 | 3.5361 | 4.3116 | 15.2467 | … | 0 |
| … | | | | | | |
| 100 | 0.28 | 3.7590 | 4.2025 | 15.7974 | … | 0 |
| … | | | | | | |
| 500 | 0.28 | 3.5361 | 4.2025 | 14.8607 | … | 0 |
| … | | | | | | |
| 999 | 0.28 | 3.8674 | 4.0987 | 15.8518 | … | 0 |
), ArticleFig(id=1243301650929139799, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Tab.3, caption=
Physical model of vessel 5415 simulation
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| 条件 | 数值类型/单位 | 数值 |
|---|
| 体积分数(水) | 场函数 | Volume Fraction of Heavy Fluid of 静水VOF波 |
| 体积分数(空气) | 场函数 | Volume Fraction of Light Fluid of 静水VOF波1 |
| 压力 | 场函数 | Hydrostatic Pressure of 静水VOF波1 |
| 湍流强度 | 常数 | 0.01 |
| 湍流速度 | 常数/(m•s-1) | 1 |
| VOF波阻尼长度 | 常数/m | 3 |
| 速度 | 场函数 | Velocity of 静水VOF波1 |
| 仿真时间步长 | 常数/s | 0.02 |
), ArticleFig(id=1243301651059163227, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=表3, caption=
5415船舶仿真物理模型
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| 条件 | 数值类型/单位 | 数值 |
|---|
| 体积分数(水) | 场函数 | Volume Fraction of Heavy Fluid of 静水VOF波 |
| 体积分数(空气) | 场函数 | Volume Fraction of Light Fluid of 静水VOF波1 |
| 压力 | 场函数 | Hydrostatic Pressure of 静水VOF波1 |
| 湍流强度 | 常数 | 0.01 |
| 湍流速度 | 常数/(m•s-1) | 1 |
| VOF波阻尼长度 | 常数/m | 3 |
| 速度 | 场函数 | Velocity of 静水VOF波1 |
| 仿真时间步长 | 常数/s | 0.02 |
), ArticleFig(id=1243301651180798047, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Tab.4, caption=
Fully connected neural network parameter adjustment test scenarios
, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况 | 样本数量 | 采样数量 | 批处理量 | 仿真时间/s | 航速/(m•s-1) |
|---|
| 短时测试 | 5 | 1 | 1 | 0.06 | 2.096 |
| 长时测试 | 15 | 3 | 5 | 15 | 2.096 |
), ArticleFig(id=1243301652728496228, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=表4, caption=
全连接神经网络参数调节测试工况
, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况 | 样本数量 | 采样数量 | 批处理量 | 仿真时间/s | 航速/(m•s-1) |
|---|
| 短时测试 | 5 | 1 | 1 | 0.06 | 2.096 |
| 长时测试 | 15 | 3 | 5 | 15 | 2.096 |
), ArticleFig(id=1243301652841742442, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Tab.5, caption=
Short-term testing for ReLU
, figureFileSmall=null, figureFileBig=null, tableContent=
| 网络层数 | 学习率 | 试验次数 | 预测时间/s | 合格率 |
|---|
| 3 | 1.0×10-4 | 2 | 均未收敛 | 0 |
| 3 | 5.0×10-4 | 3 | (1)168 2次未收敛 | 0.3 |
| 3 | 5.5×10-4 | 3 | 均未收敛 | 0 |
| 3 | 6.0×10-4 | 3 | (1)24 2次未收敛 | 0.3 |
| 3 | 6.5×10-4 | 3 | (1)30.5 2次未收敛 | 0.3 |
| | | (1)94 | |
| 3 | 7.0×10-4 | 6 | (2)82 | 0.3 |
| | | 4次未收敛 | |
| | | (1)163 | |
| | | (2)360.1 | |
| | | (3)11 | |
| 3 | 7.5×10-4 | 10 | (4)60.06 | 0.6 |
| | | (5)295 | |
| | | (6)22 | |
| | | 4次未收敛 | |
| | | (1)60.09 | |
| 3 | 8.0×10-4 | 5 | (2)31 | 0.4 |
| | | 3次未收敛 | |
| 3 | 8.5×10-4 | 2 | (1)24 1次未收敛 | 0.5 |
| 3 | 9.0×10-4 | 1 | 未收敛 | 0 |
| 4 | 5.0×10-4 | 1 | 未收敛 | 0 |
| 4 | 5.5×10-4 | 1 | 未收敛 | 0 |
| 4 | 6.0×10-4 | 1 | 未收敛 | 0 |
| 4 | 7.0×10-4 | 1 | 未收敛 | 0 |
), ArticleFig(id=1243301652938211437, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=表5, caption=
ReLU短时测试
, figureFileSmall=null, figureFileBig=null, tableContent=
| 网络层数 | 学习率 | 试验次数 | 预测时间/s | 合格率 |
|---|
| 3 | 1.0×10-4 | 2 | 均未收敛 | 0 |
| 3 | 5.0×10-4 | 3 | (1)168 2次未收敛 | 0.3 |
| 3 | 5.5×10-4 | 3 | 均未收敛 | 0 |
| 3 | 6.0×10-4 | 3 | (1)24 2次未收敛 | 0.3 |
| 3 | 6.5×10-4 | 3 | (1)30.5 2次未收敛 | 0.3 |
| | | (1)94 | |
| 3 | 7.0×10-4 | 6 | (2)82 | 0.3 |
| | | 4次未收敛 | |
| | | (1)163 | |
| | | (2)360.1 | |
| | | (3)11 | |
| 3 | 7.5×10-4 | 10 | (4)60.06 | 0.6 |
| | | (5)295 | |
| | | (6)22 | |
| | | 4次未收敛 | |
| | | (1)60.09 | |
| 3 | 8.0×10-4 | 5 | (2)31 | 0.4 |
| | | 3次未收敛 | |
| 3 | 8.5×10-4 | 2 | (1)24 1次未收敛 | 0.5 |
| 3 | 9.0×10-4 | 1 | 未收敛 | 0 |
| 4 | 5.0×10-4 | 1 | 未收敛 | 0 |
| 4 | 5.5×10-4 | 1 | 未收敛 | 0 |
| 4 | 6.0×10-4 | 1 | 未收敛 | 0 |
| 4 | 7.0×10-4 | 1 | 未收敛 | 0 |
), ArticleFig(id=1243301653059846258, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Tab.6, caption=
Long-term testing for ReLU
, figureFileSmall=null, figureFileBig=null, tableContent=
| 网络层数 | 学习率 | 试验次数 | 预测时间/s | 合格率 |
|---|
| 3 | 1.0×10-4 | 1 | 未收敛 | 0 |
| | | (1)13 | |
| | | (2)39 | |
| 3 | 5.0×10-4 | 6 | (3)28 (4)267 | 0.66 |
| | | 2次未收敛 | |
| 3 | 5.5×10-4 | 2 | 未收敛 | 0 |
| 4 | 1.0×10-4 | 1 | 未收敛 | 0 |
| 4 | 5.0×10-4 | 2 | (1)73 (2)18 | 1 |
), ArticleFig(id=1243301653168898164, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=表6, caption=
ReLU长时测试
, figureFileSmall=null, figureFileBig=null, tableContent=
| 网络层数 | 学习率 | 试验次数 | 预测时间/s | 合格率 |
|---|
| 3 | 1.0×10-4 | 1 | 未收敛 | 0 |
| | | (1)13 | |
| | | (2)39 | |
| 3 | 5.0×10-4 | 6 | (3)28 (4)267 | 0.66 |
| | | 2次未收敛 | |
| 3 | 5.5×10-4 | 2 | 未收敛 | 0 |
| 4 | 1.0×10-4 | 1 | 未收敛 | 0 |
| 4 | 5.0×10-4 | 2 | (1)73 (2)18 | 1 |
), ArticleFig(id=1243301653269561464, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Tab.7, caption=
Short-term testing for Leaky-ReLU
, figureFileSmall=null, figureFileBig=null, tableContent=
| 网络层数 | 学习率 | 负值斜率 | 试验次数 | 预测时间/s | 合格率 |
|---|
| 3 | 1.0×10-4 | 0.01 | 2 | 未收敛 | 0 |
| 3 | 1.0×10-4 | 0.05 | 1 | 未收敛 | 0 |
| 3 | 5.0×10-4 | 0.01 | 2 | 未收敛 | 0 |
| | | | (1)26 | |
| | | | (2)57 | |
| 3 | 5.0×10-4 | 0.03 | 5 | (3)20 | 0.8 |
| | | | (4)238 | |
| | | | 1次未收敛 | |
| | | | (1)26 | |
| | | | (2)204 | |
| | | | (3)50 | |
| 3 | 5.0×10-4 | 0.05 | 8 | (4)190 (5)528 | 1 |
| | | | (6)476 | |
| | | | (7)625 | |
| | | | (8)202 | |
| | | | (1)1422 | |
| 3 | 5.0×10-4 | 0.1 | 4 | (2)46 (3)31 | 1 |
| | | | (4)196 | |
| 3 | 8.0×10-4 | 0.2 | 1 | (1)240.06 | 1 |
| 4 | 1.0×10-4 | 0.01 | 1 | 未收敛 | 0 |
| 4 | 5.0×10-4 | 0.01 | 1 | 未收敛 | 0 |
| 4 | 5.0×10-4 | 0.03 | 2 | 未收敛 | 0 |
| | | | (1)104 | |
| 4 | 5.0×10-4 | 0.05 | 4 | (2)596 (3)150 | 1 |
| | | | (4)120 | |
| 4 | 5.0×10-4 | 0.1 | 1 | (1)60.07 | 1 |
), ArticleFig(id=1243301653403779198, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=表7, caption=
Leaky-ReLU短时测试
, figureFileSmall=null, figureFileBig=null, tableContent=
| 网络层数 | 学习率 | 负值斜率 | 试验次数 | 预测时间/s | 合格率 |
|---|
| 3 | 1.0×10-4 | 0.01 | 2 | 未收敛 | 0 |
| 3 | 1.0×10-4 | 0.05 | 1 | 未收敛 | 0 |
| 3 | 5.0×10-4 | 0.01 | 2 | 未收敛 | 0 |
| | | | (1)26 | |
| | | | (2)57 | |
| 3 | 5.0×10-4 | 0.03 | 5 | (3)20 | 0.8 |
| | | | (4)238 | |
| | | | 1次未收敛 | |
| | | | (1)26 | |
| | | | (2)204 | |
| | | | (3)50 | |
| 3 | 5.0×10-4 | 0.05 | 8 | (4)190 (5)528 | 1 |
| | | | (6)476 | |
| | | | (7)625 | |
| | | | (8)202 | |
| | | | (1)1422 | |
| 3 | 5.0×10-4 | 0.1 | 4 | (2)46 (3)31 | 1 |
| | | | (4)196 | |
| 3 | 8.0×10-4 | 0.2 | 1 | (1)240.06 | 1 |
| 4 | 1.0×10-4 | 0.01 | 1 | 未收敛 | 0 |
| 4 | 5.0×10-4 | 0.01 | 1 | 未收敛 | 0 |
| 4 | 5.0×10-4 | 0.03 | 2 | 未收敛 | 0 |
| | | | (1)104 | |
| 4 | 5.0×10-4 | 0.05 | 4 | (2)596 (3)150 | 1 |
| | | | (4)120 | |
| 4 | 5.0×10-4 | 0.1 | 1 | (1)60.07 | 1 |
), ArticleFig(id=1243301653546385542, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Tab.8, caption=
Long-term testing for Leaky-ReLU
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| 网络层数 | 学习率 | 负值斜率 | 试验次数 | 预测时间/s | 合格率 |
|---|
| | | | (1)84 | |
| 3 | 5.0×10-4 | 0.03 | 4 | (2)45 (3)295 | 1 |
| | | | (4)337 | |
| | | | (1)28 | |
| 3 | 5.0×10-4 | 0.05 | 4 | (2)36 (3)12 | 1 |
| | | | (4)40 | |
), ArticleFig(id=1243301653647048843, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=表8, caption=
Leaky-ReLU长时测试
, figureFileSmall=null, figureFileBig=null, tableContent=
| 网络层数 | 学习率 | 负值斜率 | 试验次数 | 预测时间/s | 合格率 |
|---|
| | | | (1)84 | |
| 3 | 5.0×10-4 | 0.03 | 4 | (2)45 (3)295 | 1 |
| | | | (4)337 | |
| | | | (1)28 | |
| 3 | 5.0×10-4 | 0.05 | 4 | (2)36 (3)12 | 1 |
| | | | (4)40 | |
), ArticleFig(id=1243301653739323536, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=EN, label=Tab.9, caption=
FCNN network forecasting results
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| 误差 | 第一次循环 | 第二次循环 | 第三次循环 | 第四次循环 | 总平均误差 |
|---|
| Error0 | 1.579 | -0.0102 | 0.0863 | 0.0658 | 1.9415 |
| Error1 | 0.0157 | -0.0102 | 0.0169 | 0.0441 | 0.0217 |
), ArticleFig(id=1243301653848375442, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243301636920164936, language=CN, label=表9, caption=
FCNN网络预报结果
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| 误差 | 第一次循环 | 第二次循环 | 第三次循环 | 第四次循环 | 总平均误差 |
|---|
| Error0 | 1.579 | -0.0102 | 0.0863 | 0.0658 | 1.9415 |
| Error1 | 0.0157 | -0.0102 | 0.0169 | 0.0441 | 0.0217 |
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Test scenarios for ship modeling optimization
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| 迭代次数 | 样本数量 | 检验采样量 | 批处理量 | 仿真时间/s | 航速/(m•s-1) | 傅汝德数 |
|---|
| 14 | 15 | 3 | 5 | 15 | 2.096 | 0.28 |
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船舶建模优化测试工况
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| 迭代次数 | 样本数量 | 检验采样量 | 批处理量 | 仿真时间/s | 航速/(m•s-1) | 傅汝德数 |
|---|
| 14 | 15 | 3 | 5 | 15 | 2.096 | 0.28 |
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Calculated (before/after optimization) and experimental results of CT
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| 阻力系数 | 船型优化前 | 船型优化后 | 试验值(INSEAN)[14] | 试验值(DTMB)[15] |
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| CT | 3.91×10-3 | 3.89×10-3 | 4.23×10-3 | 4.27×10-3 |
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优化前后阻力计算结果与试验结果
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| 阻力系数 | 船型优化前 | 船型优化后 | 试验值(INSEAN)[14] | 试验值(DTMB)[15] |
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| CT | 3.91×10-3 | 3.89×10-3 | 4.23×10-3 | 4.27×10-3 |
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