计算机科学技术

• sparse

  The sparse user-item matrix often hurts the performance of recommendation system.

  用户评分矩阵稀疏问题影响协同过滤的推荐性能。

• sparsity

  The collaborative filtering (CF) algorithms often suffer from data sparsity problem.

  评分矩阵数据稀疏问题严重影响协同过滤推荐性能。

电子、通信与自动控制技术

• sparse

  So it can provide sparse representation for edges of images.

  它对图像的边缘信息有更为稀疏的表示。

经济学

• thinning

  In this paper, we propose a two-dimensional risk model with thinning dependent structure and three different types of ruin probabilities are defined.

  本文引入了一个含稀疏相关结构的二维风险模型,并基于此模型定义了三类不同的破产概率。