当代图书馆的个性化信息推荐

本文首先简要介绍从广泛使用数字和网络技术、智慧化管理和智慧化服务、服务的网络形式或移动形式等不同角度对当代图书馆的特征及发展前景的研究,然后着重介绍近年来理工科研究人员热烈进行的个性化推荐系统研究,最后介绍一些密切结合普遍的个性化推荐系统,又考虑个性化图书推荐特点的文献,并指出这样的研究在国内外都还太少,当代图书馆研究者急须了解理工科的推荐系统研究。     

面向移动健康医疗系统的多层二分网络推荐算法

移动健康医疗系统是信息搜索、精准服务和信息过滤的重要手段,有效提升现有医疗资源的使用效率。为提高健康资讯推荐效率和准确性,提出一种多层二分网络推荐算法,将用户评价标准扩展为“感兴趣”、“不感兴趣”和“未知”3种级别;同时,根据用户感兴趣的信息类别,将原有的“用户-信息”层改进为“用户-信息-类别”层,使置信度在移动医疗多层网络中迭代传播,优化分级医疗资源的使用效率。实验结果表明,多层二分网络推荐算法提高了移动健康医疗系统的服务效率。     

新闻推荐系统研究综述

通过网络阅读新闻已经成为一种广泛流行的阅读方式,随着网络新闻资源的日益普及,在海量的新闻中,用户很容易被一些偏离自己兴趣爱好的信息所淹没,这种现状促进了新闻推荐系统的发展,其旨在帮助用户在巨大的动态新闻空间发现心仪的新闻,提高用户满意度.分析新闻推荐系统研究过程和现状,对新闻推荐系统的4个关键技术进行重点分析,并比较其...     

一种基于隐式信任感知的MOOCs推荐方法

[目的/意义]随着MOOCs迅猛发展和普及,如何利用智能推荐技术为学习者从海量的MOOC中"寻找最佳课程"成为MOOC发展中需要解决的重要课题。[方法/过程]基于自我知觉理论和学习行为投入框架,充分利用学习行为日志和评分数据挖掘学习者之间的隐式信任关系,并通过信任传播建立MOOC社区信任网络,从而构建动态结合兴趣和隐式信任感知的混合推荐方法。为解决数据稀疏问题,提出基于信任的联合概率矩阵分解模型(TA-PMF),将课程评分矩阵、信任关系矩阵的分解相结合来挖掘用户及课程潜在特征,进而实现评分预测。[结果/结论]真实数据集测试结果表明,与显性评分值相比,学习行为投入信息对信任度构建贡献权重达到0.7;TA-PMF方法对MOOC推荐具有较好的适用性,且能在一定程度上缓解冷启动问题。     

基于数据挖掘的图书智能推荐系统研究

针对目前传统数字图书馆无法为用户提供准确个性的图书推荐服务的问题,提出构建基于数据挖掘技术的图书智能推荐系统,简单分析数据挖掘技术中关联规则技术适用图书推荐的原因和相关概念,并且对该系统的框架进行研究,最后通过实验,运用数据挖掘软件对真实的借阅记录进行关联规则挖掘,得出关联规则作为图书智能推荐系统的关键技术是行之有效的结论。     

Enhancing sequential recommendation with contrastive Generative Adversarial Network

Sequential recommendation models a user’s historical sequence to predict future items. Existing studies utilize deep learning methods and contrastive learning for data augmentation to alleviate data sparsity. However, these existing methods cannot learn accurate high-quality item representations while augmenting data. In addition, they usually ignore data noise and user cold-start issues. To solve the above issues, we investigate the possibility of Generative Adversarial Network (GAN) with contrastive learning for sequential recommendation to balance data sparsity and noise. Specifically, we propose a new framework, Enhanced Contrastive Learning with Generative Adversarial Network for Sequential Recommendation (ECGAN-Rec), which models the training process as a GAN and recommendation task as the main task of the discriminator. We design a sequence augmentation module and a contrastive GAN module to implement both data-level and model-level augmentations. In addition, the contrastive GAN learns more accurate high-quality item representations to alleviate data noise after data augmentation. Furthermore, we propose an enhanced Transformer recommender based on GAN to optimize the performance of the model. Experimental results on three open datasets validate the efficiency and effectiveness of the proposed model and the ability of the model to balance data noise and data sparsity. Specifically, the improvement of ECGAN-Rec in two evaluation metrics (HR@N and NDCG@N) compared to the state-of-the-art model performance on the Beauty, Sports and Yelp datasets are 34.95%, 36.68%, and 13.66%, respectively. Our implemented model is available via https://github.com/nishawn/ECGANRec-master.     

Personalized fashion outfit generation with user coordination preference learning

This paper focuses on personalized outfit generation, aiming to generate compatible fashion outfits catering to given users. Personalized recommendation by generating outfits of compatible items is an emerging task in the recommendation community with great commercial value but less explored. The task requires to explore both user-outfit personalization and outfit compatibility, any of which is challenging due to the huge learning space resulted from large number of items, users, and possible outfit options. To specify the user preference on outfits and regulate the outfit compatibility modeling, we propose to incorporate coordination knowledge in fashion. Inspired by the fact that users might have coordination preference in terms of category combination, we first define category combinations as templates and propose to model user-template relationship to capture users’ coordination preferences. Moreover, since a small number of templates can cover the majority of fashion outfits, leveraging templates is also promising to guide the outfit generation process. In this paper, we propose Template-guided Outfit Generation (TOG) framework, which unifies the learning of user-template interaction, user–item interaction and outfit compatibility modeling. The personal preference modeling and outfit generation are organically blended together in our problem formulation, and therefore can be achieved simultaneously. Furthermore, we propose new evaluation protocols to evaluate different models from both the personalization and compatibility perspectives. Extensive experiments on two public datasets have demonstrated that the proposed TOG can achieve preferable performance in both evaluation perspectives, namely outperforming the most competitive baseline BGN by 7.8% and 10.3% in terms of personalization precision on iFashion and Polyvore datasets, respectively, and improving the compatibility of the generated outfits by over 2%.     

Multi-feature fused collaborative attention network for sequential recommendation with semantic-enriched contrastive learning

Recently, graph neural network (GNN) has been widely used in sequential recommendation because of its powerful ability to capture high-order collaborative relations, greatly promoting recommendation performance. However, some existing GNN-based methods fail to make full use of multiple relevant features of nodes and ignore the impact of semantic association between nodes on extracting user preferences. To this end, we propose a multi-feature fused collaborative attention network MASR, which sufficiently learns the temporal and positional features of nodes, and innovatively measures the importance of these two features for analyzing the nodes’ dynamic patterns. In addition, we incorporate semantic-enriched contrastive learning into collaborative filtering to enhance the semantic association between nodes and reduce the noise from the structural neighborhood, which has a positive effect on the sequential recommendation. Compared with the baseline models, the performance of MASR on MovieLens, CDs and Beauty datasets is improved by 2.0%, 2.1% and 1.7% respectively, proving its effectiveness in the sequential recommendation.     

Web信息个性化的研究

分析了个性化用户兴趣模型的建立度更新；综述了实现Web信息个性化的两类系统：推荐系统和个性化的Web搜索系统；研究了实现个性化搜索的前提条件；最后对个性化搜索的将来进行了展望。     

矩阵分解技术在电影推荐系统中的应用

随着大数据、移动互联网的快速发展,推荐系统成为解决网络信息过载的有力工具.为解决传统推荐系统由于没有将社交网络中用户关系考虑进去而导致的稀疏矩阵、冷启动等问题,提出一种基于矩阵分解技术的电影推荐系统算法MFMRS.该算法充分考虑到社交网络中用户之间的关系对推荐结果的影响,通过设置特征参数、损失函数、随机梯度下降等方法对...