P2R-GCN

GCN based paper-researcher recommendation, SJTU EE447 course project.

In this project, we build an acedemic paper recommendation system based on graph convolutional network fo researchers. We modeled paper-researcher(P2R) relationship as a large bipartite graph, based on such bipartite, we explored different embedding, sampling and training strategies to obtain good performance of proposed model.

This model first embeds each node's attributes (e.g. venue, year, field of study(FOS)) into vectors. For FOS information, it first processed by fastText word embedding.

Then each node is computed as follows to get information updated.

Loss function for recommendation: Hinge Loss/ BPR Triplet Loss — Help model to recognize positive examples from positive examples.

Dataset:

The data I use is the citation network dataset DBLP v11 (4m papers + 36m authors). For a practical training, I just use a tiny subset of this huge dataset, which only contains CCF A conferences and journals on AI area(3k papers + 5k authors).

The sepcific dataset I use and other cache files can be downloaded in OneDrive

Environment:

• Python 3.6
• Pytorch 1.0
• DGL 0.3(beta)
• Spacy + fastText
• CUDA supported

How the Train?

simply run main.py, here is an example

python main.py --opt Adam --lr 1e-3 --sched none --sgd-switch 60  --use-feature --layers 3 --n-negs 1 --hard-neg-prob 0.3 --epochs 300 --suffix collect_300_zero_h --zero_h

Below are training results:

MRRs:

Models	P2R-GCN-Z	P2R-GCN-R	P2R-GCN-B	FOS	Random Walk
MRR	0.0261	0.0251	0.0124	0.0062	0.0048

Demo:

After generating necessary cache files, you can directly run demo.py to try our model. Here are some demo results:

Reference & Credits:

Sincerely thanks to DGL for providing lots of tutorials of high quality on GNNs.

Major Paper Ref: R. Ying et al. Graph convolutional neural networks for web- scale recommender systems. KDD, 2018.