论文标题
推荐和工程系统的大规模顺序学习
Large-Scale Sequential Learning for Recommender and Engineering Systems
论文作者
论文摘要
在本文中,我们专注于通过适应当前条件来提供个性化排名的自动算法的设计。为了证明所提出方法的经验效率,我们研究了它们在推荐系统和能源系统领域中决策的应用。对于前者,我们提出了称为Saros的新型算法,这些算法考虑了两种反馈,用于学习相互作用的顺序。所提出的方法包括最大程度地减少由一系列非点击项目构成的块上的成对排名损失,然后为每个用户点击一个。我们还探讨了长期记忆对预测准确性的影响。萨罗斯(Saros)基于质量指标表现出高度竞争性和有希望的结果,并且比随机梯度下降和批处理经典方法,在损失收敛方面的结果也更快。关于电源系统,我们提出了一种基于对真实事件位置接近的线路的错误分类的关注的故障线检测算法。与基于卷积神经网络的初始方法相比,提出的考虑邻居线的想法显示出具有统计学意义的结果,用于电网中的故障检测。
In this thesis, we focus on the design of an automatic algorithms that provide personalized ranking by adapting to the current conditions. To demonstrate the empirical efficiency of the proposed approaches we investigate their applications for decision making in recommender systems and energy systems domains. For the former, we propose novel algorithm called SAROS that take into account both kinds of feedback for learning over the sequence of interactions. The proposed approach consists in minimizing pairwise ranking loss over blocks constituted by a sequence of non-clicked items followed by the clicked one for each user. We also explore the influence of long memory on the accurateness of predictions. SAROS shows highly competitive and promising results based on quality metrics and also it turn out faster in terms of loss convergence than stochastic gradient descent and batch classical approaches. Regarding power systems, we propose an algorithm for faulted lines detection based on focusing of misclassifications in lines close to the true event location. The proposed idea of taking into account the neighbour lines shows statistically significant results in comparison with the initial approach based on convolutional neural networks for faults detection in power grid.