Update README.md

README.md

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-license: apache-2.0
+License: Apache-2.0
+
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-[github](https://github.com/WPEM/CPICANN)
+## CPICANN Datasets
+
+This repository contains the data sets described in the CPICANN paper, available at [GitHub](https://github.com/WPEM/CPICANN).
 
 
-Here are training dataset involoved in our paper
+CPICANN is evaluated on four distinguished datasets, denoted as D1, D2, D3, and D4, with the following characteristics:
 
+- **D1**: 0% background ratio and Gaussian noise (σ=0.25) (v chosen in paper)
+- **D2**: 3% background ratio and Gaussian noise (σ=0.25)
+- **D3**: 0% background ratio and Gaussian noise (σ=1)
+- **D4**: 0% background ratio and Gaussian noise (σ=3)
 
-We are still going on establish the high-quality XRD database. see [here](https://github.com/Bin-Cao/SimXRD)
+Contribution and suggestions are always welcome. You can also contact the authors for research collaboration.