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ai-challenge-stock-prediction's Introduction

虚拟股票趋势预测

比赛网站:https://challenger.ai/competition/trendsense

TODO

  1. experiment接口:https://mp.weixin.qq.com/s/qGe37OY_Iy9Qr9Rabpv7CA
  2. 尝试PyTorch
  3. 实现交叉验证
  4. group字段做embedding
  5. 加上tensorboard summary打点
  6. 结果的稳定性(数据量小):检查各个era上的测试指标,或者检查交叉验证结果

思路

  1. 聚类
  2. groupera字段应该都比较重要,尤其是group字段(测试集里也有此字段)
  3. 特征可能是时序的
  4. pseudo labeling
  5. RNN
  6. Attention
  7. CNN底层特征 + RNN
  8. DenseNet (Densely Connected Convolutional Networks,ResNet的求和换成concat)
  9. Bottleneck (of CNN, mentioned in fastai course before,上面那篇论文里也用到了,好像是1 * 1卷积、减少维数、增加filter数量)
  10. TensorBoard监控中间隐藏层的值、梯度,看是否需要加batch norm
  11. 最后不要dense layer,直接global average pooling试试看

小数据集上结果的稳定性

  1. Dropout
  2. CNN如果在最后不要dense layer、直接global average pooling的话,试试先在这些filters上面做dropout
  3. Bagging
  4. Contractive AutoEncoder预训练 + 微调
  5. VAE预训练 + 微调
  6. Jacobian矩阵F范数作为正则项
  7. CAE + VAE
  8. 原始数据加入噪声(目的:Data Augmentation或者提高模型鲁棒性)
  9. 权重加噪声
  10. 加入group字段时,最好在没有加这个字段的基础上微调
  11. 贝叶斯模型在小数据集上表现比较好
  12. 置信区间比点估计好
  13. 论文:Training Neural Networks with Very Little Data -- A Draft

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