sparsity

名词：

名词: sparseness

更多词形：

副词: sparsely | 形容词比较级: sparser | 形容词最高级: sparsest | 名词: sparseness |

单词例句：

To overcome the difficulty of data sparsity in recommendation systems, a collaborative filtering (CF) algorithm based on clustering basal users is presented.

摘要为了降低数据稀疏性的影响，提高推荐系统的推荐生成质量，提出了一种基于多层相似性用户聚类的协同过滤推荐算法。

Mast: A vertical spar or pole to which a sail or sails attach.

桅杆：一种垂直圆材或杆，用来悬挂船帆。

A metal ring that moves freely back and forth on a rope,rod,or spar.

滑环在一根绳、杆子或圆材上可以自由来回移动的金属环

They always spar over trivial matters.

他们总是为一些小事而争吵。

Experiments results show that the algorithms can achieve better prediction accuracy even with extremely sparsity of data.

实验结果表明即使在数据极度稀疏的情况下，改进后的算法仍然能取得较好的推荐效果。

The experiment results argue that the algorithm efficiently improves sparsity of rating data,and promises to make recommendations more accurately than conventional CF algorithms.

实验结果表明,该算法有效地解决了数据稀疏问题,提高了推荐的质量.

Imaginary spar, pure natural quartz.

幻晶石，纯天然的水晶。

Two male bison spar in a field.

两头北美野牛在草场上。

Greedy Group Sparsity Promoting Optmization complete source code, has been tested.

(译)：贪心组稀疏促进Optmization完整的源代码，已经过测试。