《计算机应用》唯一官方网站 ›› 2026, Vol. 46 ›› Issue (6): 1818-1828.DOI: 10.11772/j.issn.1001-9081.2025060729
收稿日期:2025-07-01
修回日期:2025-10-02
接受日期:2025-10-14
发布日期:2025-10-30
出版日期:2026-06-10
通讯作者:
莫先
作者简介:戚航(2000—),男,安徽淮南人,硕士研究生,CCF会员,主要研究方向:图学习、推荐系统基金资助:
Hang QI, Tingting DONG, Yongqiang NAI, Xian MO(
)
Received:2025-07-01
Revised:2025-10-02
Accepted:2025-10-14
Online:2025-10-30
Published:2026-06-10
Contact:
Xian MO
About author:QI Hang, born in 2000, M. S. candidate. His research interests include graph learning, recommender systems.Supported by:摘要:
针对现有基于图神经网络(GNN)的协同过滤方法在数据稀疏和噪声场景下存在的静态噪声注入易掩盖真实信号、固定语义原型难以捕捉用户的动态兴趣以及复杂增强方法计算开销大等问题,提出一种基于图扩散生成与自适应采样的对比协同过滤方法。首先,设计基于渐进去噪的轻量级图扩散生成机制,通过前向加噪和反向去噪优化节点表示,生成抗噪性强的对比视图;其次,结合随机掩码与重启随机游走算法(RWR),协同建模局部邻域特征与全局结构语义,生成高质量的负样本;最后,通过改进的InfoNCE (Information Noise Contrastive Estimation)损失函数优化多视图对比学习目标,并提升表征的判别性。在Gowalla、Yelp和Amazon数据集上,所提方法的前20个结果的召回率(Recall@20)指标较最优的基线方法分别提升了0.63%、1.36%和1.88%,前40个结果的归一化折损累计增益(NDCG@40)指标分别提升了0.95%、1.47%和1.24%,长尾用户的推荐效果提升了26.7%,训练效率提升了90%且收敛速度提升了32%。可见,该方法显著提升了开放环境下推荐系统的抗噪性与动态适应性。
中图分类号:
戚航, 董婷婷, 乃永强, 莫先. 基于图扩散生成与自适应采样的对比协同过滤方法[J]. 计算机应用, 2026, 46(6): 1818-1828.
Hang QI, Tingting DONG, Yongqiang NAI, Xian MO. Contrastive collaborative filtering method based on graph diffusion generation and adaptive sampling[J]. Journal of Computer Applications, 2026, 46(6): 1818-1828.
| 数据集 | 用户数 | 项目数 | 交互数 | 交互密度/ |
|---|---|---|---|---|
| Gowalla | 25 557 | 19 747 | 294 983 | 5.85 |
| Yelp | 42 712 | 26 822 | 182 357 | 1.59 |
| Amazon | 76 469 | 83 761 | 966 680 | 1.51 |
表1 数据集的统计信息
Tab. 1 Statistics of datasets
| 数据集 | 用户数 | 项目数 | 交互数 | 交互密度/ |
|---|---|---|---|---|
| Gowalla | 25 557 | 19 747 | 294 983 | 5.85 |
| Yelp | 42 712 | 26 822 | 182 357 | 1.59 |
| Amazon | 76 469 | 83 761 | 966 680 | 1.51 |
| 方法 | Gowalla | Yelp | Amazon | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Recall@ 20 | NDCG@20 | Recall@40 | NDCG@40 | Recall@20 | NDCG@20 | Recall@40 | NDCG@40 | Recall@20 | NDCG@20 | Recall@40 | NDCG@40 | |
| BiasMF | 0.086 7 | 0.057 9 | 0.126 9 | 0.069 5 | 0.019 8 | 0.009 4 | 0.030 7 | 0.012 0 | 0.032 4 | 0.021 1 | 0.057 8 | 0.029 3 |
| NCF | 0.101 9 | 0.067 4 | 0.156 3 | 0.083 3 | 0.030 4 | 0.014 3 | 0.048 7 | 0.018 7 | 0.036 7 | 0.023 4 | 0.060 0 | 0.030 6 |
| AutoRec | 0.147 7 | 0.069 0 | 0.251 1 | 0.098 5 | 0.049 1 | 0.022 2 | 0.069 2 | 0.026 8 | 0.052 5 | 0.031 8 | 0.082 6 | 0.041 5 |
| PinSage | 0.123 5 | 0.080 9 | 0.188 2 | 0.099 4 | 0.051 0 | 0.024 5 | 0.074 3 | 0.031 5 | 0.048 6 | 0.031 7 | 0.077 3 | 0.040 2 |
| STGCN | 0.157 4 | 0.104 2 | 0.231 8 | 0.125 2 | 0.056 2 | 0.028 2 | 0.085 6 | 0.035 5 | 0.058 3 | 0.037 7 | 0.090 8 | 0.047 8 |
| GCMC | 0.186 3 | 0.115 1 | 0.262 7 | 0.139 0 | 0.058 4 | 0.028 0 | 0.089 1 | 0.036 0 | 0.083 7 | 0.057 9 | 0.119 6 | 0.069 2 |
| NGCF | 0.175 7 | 0.113 5 | 0.258 6 | 0.136 7 | 0.068 1 | 0.033 6 | 0.101 9 | 0.041 9 | 0.055 1 | 0.035 3 | 0.087 6 | 0.045 4 |
| GCCF | 0.201 2 | 0.128 2 | 0.290 3 | 0.153 2 | 0.074 2 | 0.036 5 | 0.115 1 | 0.046 6 | 0.077 2 | 0.050 1 | 0.117 5 | 0.062 5 |
| LightGCN | 0.223 0 | 0.143 3 | 0.318 1 | 0.167 0 | 0.076 1 | 0.037 3 | 0.117 5 | 0.047 4 | 0.086 8 | 0.057 1 | 0.128 5 | 0.069 7 |
| DGCF | 0.205 5 | 0.131 2 | 0.292 9 | 0.155 5 | 0.070 0 | 0.034 7 | 0.107 2 | 0.043 7 | 0.061 7 | 0.037 2 | 0.091 2 | 0.046 8 |
| SLRec | 0.200 1 | 0.129 8 | 0.286 3 | 0.154 0 | 0.066 5 | 0.032 7 | 0.103 2 | 0.041 8 | 0.074 2 | 0.048 0 | 0.112 3 | 0.059 8 |
| NCL | 0.228 3 | 0.147 8 | 0.323 2 | 0.174 5 | 0.080 6 | 0.040 2 | 0.123 0 | 0.050 5 | 0.095 5 | 0.062 3 | 0.140 9 | 0.076 4 |
| SGL | 0.233 2 | 0.150 9 | 0.325 1 | 0.178 0 | 0.080 3 | 0.039 8 | 0.122 6 | 0.050 2 | 0.087 4 | 0.569 0 | 0.131 2 | 0.070 4 |
| HCCF | 0.229 3 | 0.148 2 | 0.325 8 | 0.175 1 | 0.078 9 | 0.039 1 | 0.121 0 | 0.049 2 | 0.088 5 | 0.057 8 | 0.133 5 | 0.071 6 |
| AdaGCL | 0.133 5 | 0.082 7 | 0.192 8 | 0.099 0 | 0.086 3 | 0.043 4 | 0.131 6 | 0.054 5 | 0.060 1 | 0.046 9 | 0.094 0 | 0.057 6 |
| AutoCF | 0.253 8 | 0.164 5 | 0.344 1 | 0.189 8 | 0.086 9 | 0.043 7 | 0.127 3 | 0.053 3 | 0.127 7 | 0.087 9 | 0.178 2 | 0.104 8 |
| MNGAE | 0.247 3 | 0.154 1 | 0.314 5 | 0.190 4 | 0.088 1 | 0.044 1 | 0.122 6 | 0.044 3 | 0.103 3 | 0.068 8 | 0.166 7 | 0.094 3 |
| 本文方法 | 0.255 4 | 0.165 6 | 0.352 2 | 0.192 2 | 0.089 3 | 0.050 1 | 0.133 9 | 0.055 3 | 0.130 1 | 0.091 0 | 0.180 3 | 0.106 1 |
表2 不同方法在3个数据集上的性能对比
Tab. 2 Performance comparison of different methods on three datasets
| 方法 | Gowalla | Yelp | Amazon | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Recall@ 20 | NDCG@20 | Recall@40 | NDCG@40 | Recall@20 | NDCG@20 | Recall@40 | NDCG@40 | Recall@20 | NDCG@20 | Recall@40 | NDCG@40 | |
| BiasMF | 0.086 7 | 0.057 9 | 0.126 9 | 0.069 5 | 0.019 8 | 0.009 4 | 0.030 7 | 0.012 0 | 0.032 4 | 0.021 1 | 0.057 8 | 0.029 3 |
| NCF | 0.101 9 | 0.067 4 | 0.156 3 | 0.083 3 | 0.030 4 | 0.014 3 | 0.048 7 | 0.018 7 | 0.036 7 | 0.023 4 | 0.060 0 | 0.030 6 |
| AutoRec | 0.147 7 | 0.069 0 | 0.251 1 | 0.098 5 | 0.049 1 | 0.022 2 | 0.069 2 | 0.026 8 | 0.052 5 | 0.031 8 | 0.082 6 | 0.041 5 |
| PinSage | 0.123 5 | 0.080 9 | 0.188 2 | 0.099 4 | 0.051 0 | 0.024 5 | 0.074 3 | 0.031 5 | 0.048 6 | 0.031 7 | 0.077 3 | 0.040 2 |
| STGCN | 0.157 4 | 0.104 2 | 0.231 8 | 0.125 2 | 0.056 2 | 0.028 2 | 0.085 6 | 0.035 5 | 0.058 3 | 0.037 7 | 0.090 8 | 0.047 8 |
| GCMC | 0.186 3 | 0.115 1 | 0.262 7 | 0.139 0 | 0.058 4 | 0.028 0 | 0.089 1 | 0.036 0 | 0.083 7 | 0.057 9 | 0.119 6 | 0.069 2 |
| NGCF | 0.175 7 | 0.113 5 | 0.258 6 | 0.136 7 | 0.068 1 | 0.033 6 | 0.101 9 | 0.041 9 | 0.055 1 | 0.035 3 | 0.087 6 | 0.045 4 |
| GCCF | 0.201 2 | 0.128 2 | 0.290 3 | 0.153 2 | 0.074 2 | 0.036 5 | 0.115 1 | 0.046 6 | 0.077 2 | 0.050 1 | 0.117 5 | 0.062 5 |
| LightGCN | 0.223 0 | 0.143 3 | 0.318 1 | 0.167 0 | 0.076 1 | 0.037 3 | 0.117 5 | 0.047 4 | 0.086 8 | 0.057 1 | 0.128 5 | 0.069 7 |
| DGCF | 0.205 5 | 0.131 2 | 0.292 9 | 0.155 5 | 0.070 0 | 0.034 7 | 0.107 2 | 0.043 7 | 0.061 7 | 0.037 2 | 0.091 2 | 0.046 8 |
| SLRec | 0.200 1 | 0.129 8 | 0.286 3 | 0.154 0 | 0.066 5 | 0.032 7 | 0.103 2 | 0.041 8 | 0.074 2 | 0.048 0 | 0.112 3 | 0.059 8 |
| NCL | 0.228 3 | 0.147 8 | 0.323 2 | 0.174 5 | 0.080 6 | 0.040 2 | 0.123 0 | 0.050 5 | 0.095 5 | 0.062 3 | 0.140 9 | 0.076 4 |
| SGL | 0.233 2 | 0.150 9 | 0.325 1 | 0.178 0 | 0.080 3 | 0.039 8 | 0.122 6 | 0.050 2 | 0.087 4 | 0.569 0 | 0.131 2 | 0.070 4 |
| HCCF | 0.229 3 | 0.148 2 | 0.325 8 | 0.175 1 | 0.078 9 | 0.039 1 | 0.121 0 | 0.049 2 | 0.088 5 | 0.057 8 | 0.133 5 | 0.071 6 |
| AdaGCL | 0.133 5 | 0.082 7 | 0.192 8 | 0.099 0 | 0.086 3 | 0.043 4 | 0.131 6 | 0.054 5 | 0.060 1 | 0.046 9 | 0.094 0 | 0.057 6 |
| AutoCF | 0.253 8 | 0.164 5 | 0.344 1 | 0.189 8 | 0.086 9 | 0.043 7 | 0.127 3 | 0.053 3 | 0.127 7 | 0.087 9 | 0.178 2 | 0.104 8 |
| MNGAE | 0.247 3 | 0.154 1 | 0.314 5 | 0.190 4 | 0.088 1 | 0.044 1 | 0.122 6 | 0.044 3 | 0.103 3 | 0.068 8 | 0.166 7 | 0.094 3 |
| 本文方法 | 0.255 4 | 0.165 6 | 0.352 2 | 0.192 2 | 0.089 3 | 0.050 1 | 0.133 9 | 0.055 3 | 0.130 1 | 0.091 0 | 0.180 3 | 0.106 1 |
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