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book
数据分析之图算法: 基于Spark和Neo4j
by
Mark Needham
,
Amy E. Hodler
September 2020
Intermediate to advanced
213 pages
5h 25m
Chinese
Posts & Telecom Press
Content preview from
数据分析之图算法: 基于Spark和Neo4j
使用图算法增强机器学习
|
189
运行该函数可以得到图
8-18
所示的结果。
图
8-18
:社团模型的特征重要度
虽然共同作者模型总体而言非常重要,但最好避免使用过于主导性的元素,以免扭曲对新
数据的预测结果。社团发现算法在最后一个含有全部特征的模型中影响很大,这有助于完
善预测方法。
示例表明,基于图的简单特征是良好开端,随着添加更多图特征和基于图算法的特征,预
测指标持续改进。对于预测合著关系而言,现在有了一个优良且均衡的模型。
使用图进行关联特征提取可以显著地改善预测效果。图特征和图算法是否理想,这在很大
程度上取决于数据的属性,包括网络域属性和图的形状属性。建议在对性能调优之前,首
先探查数据中的预测性元素,并且使用不同的关联特征来验证假设。
练 习
还有一些领域有待研究,还有构建其他模型的方法值得思考。下面这些想法值得进一
步探索。
•
我们的模型对其他尚未用到的会议数据来说预测效果如何?
•
当测试新数据时,去除一些特征会发生什么?
•
如果在划分训练数据和测试数据时选取不同年份,是否会影响预测结果?
•
该数据集还包含论文之间的引用。是否可以使用该数据集生成不同的特征或预测未
来的引用?
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ISBN: 9787115546678