ArtRank似乎忽略关系权重

Question

我正在创建我的第一个Neo4j（4.0.4）应用程序，并且尝试基于加权的ArticleRank算法对结果进行排序。到目前为止，一切都非常直观，但是我无法弄清楚为什么关系权重不会影响ArticleRank得分。

给出架构：

MERGE (paper0:Paper {name:'Paper 0'})
MERGE (paper1:Paper {name:'Paper 1'})
MERGE (paper2:Paper {name:'Paper 2'})
MERGE (paper3:Paper {name:'Paper 3'})
MERGE (paper4:Paper {name:'Paper 4'})
MERGE (paper5:Paper {name:'Paper 5'})
MERGE (paper6:Paper {name:'Paper 6'})

MERGE (paper1)-[:CITES {weight: 10.0}]->(paper0)

MERGE (paper2)-[:CITES {weight: 1.0}]->(paper0)
MERGE (paper2)-[:CITES {weight: 100.0}]->(paper1)

MERGE (paper3)-[:CITES {weight: 10.0}]->(paper0)
MERGE (paper3)-[:CITES {weight: 1.0}]->(paper1)
MERGE (paper3)-[:CITES {weight: 100.0}]->(paper2)

MERGE (paper4)-[:CITES {weight: 10.0}]->(paper0)
MERGE (paper4)-[:CITES {weight: 1.0}]->(paper1)
MERGE (paper4)-[:CITES {weight: 100.0}]->(paper2)
MERGE (paper4)-[:CITES {weight: 10.0}]->(paper3)

MERGE (paper5)-[:CITES {weight: 100.0}]->(paper1)
MERGE (paper5)-[:CITES {weight: 1.0}]->(paper4)

MERGE (paper6)-[:CITES {weight: 10.0}]->(paper1)
MERGE (paper6)-[:CITES {weight: 100.0}]->(paper4)

当我运行此查询时：

CALL gds.alpha.articleRank.stream({
  nodeProjection: 'Paper',
  relationshipProjection: {
    CITES: {
      properties: 'weight'
    }
  },
  relationshipWeightProperty: 'weight'
})
YIELD nodeId, score
RETURN gds.util.asNode(nodeId).name AS page, score
ORDER BY score DESC

我得到与运行此查询时相同的结果：

CALL gds.alpha.articleRank.stream({
  nodeProjection: 'Paper',
  relationshipProjection: 'CITES'
})
YIELD nodeId, score
RETURN gds.util.asNode(nodeId).name AS page, score
ORDER BY score DESC

结果，是：

╒═════════╤═══════════════════╕
│"page"   │"score"            │
╞═════════╪═══════════════════╡
│"Paper 0"│0.3462769146633946 │
├─────────┼───────────────────┤
│"Paper 1"│0.31950147982279303│
├─────────┼───────────────────┤
│"Paper 4"│0.21375000253319743│
├─────────┼───────────────────┤
│"Paper 2"│0.21092906260164457│
├─────────┼───────────────────┤
│"Paper 3"│0.18028125041164458│
├─────────┼───────────────────┤
│"Paper 5"│0.15000000000000002│
├─────────┼───────────────────┤
│"Paper 6"│0.15000000000000002│
└─────────┴───────────────────┘

鉴于关系具有不同的权重，如何在利用权重的同时运行ArticleRank算法与不使用权重时得到相同的分数？

Answer 1

GDS 1.2中的文章等级实现不支持权重。

该文档无助地在配置参数中列出了relationshipWeightProperty。这在技术上是正确的，因为算法配置确实接受此参数。但是算法将忽略它。它看起来像这样的原因是：a）Article Rank与Page Rank共享API，它确实支持权重； b）Article Rank是一种Alpha层算法，因此不支持产品，也没有经过正确性，性能等检查和完全支持的算法的可用性审查。

该文档确实在标题Graph type support下继续说明该算法支持：

• 定向，未加权
• 未定向，未加权

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这是一个特别的答案，让我们继续在Github上进行对话。