check some tasks in the outline

Today, I checked some tasks in the outline.

Summary:

1. cumulative gains chart and ROC curve are for binary prediction, which is not suitable in our case.
2. boxplots and histograms of data visualization methods may be helpful.
3. pearson correlation coefficient can be used for correlation analysis.
4. concordant and discordant pairs are for value ranking, which is not suitable in our case.

The following is the prediction results with ANN models done before, which is a good prediction with NRMSE less than 0.09.

Tomorrow, I will continue to follow the outline to finish some tasks.