Add hyperparameter tuning to node embeddings

Author: JohT

cypher/Dependencies_Projection/Dependencies_13_Sample_Projected_Graph.cypher

@@ -0,0 +1,11 @@
+// Creates a smaller projection by sampling the original graph using "Common Neighbour Aware Random Walk"
+
+CALL gds.graph.sample.cnarw(
+  $dependencies_projection + '-sampled-cleaned',
+  $dependencies_projection,
+  {
+    samplingRatio: toFloat($dependencies_projection_sampling_ratio)
+  }
+)
+YIELD graphName, fromGraphName, nodeCount, relationshipCount, startNodeCount, projectMillis
+RETURN graphName, fromGraphName, nodeCount, relationshipCount, startNodeCount, projectMillis

cypher/Node_Embeddings/Node_Embeddings_1d_Fast_Random_Projection_Stream.cypher

@@ -4,6 +4,7 @@ CALL gds.fastRP.stream(
  $dependencies_projection + '-cleaned', {
       embeddingDimension: toInteger($dependencies_projection_embedding_dimension)
      ,randomSeed: 30
+     ,normalizationStrength: 0.3
      ,relationshipWeightProperty: $dependencies_projection_weight_property
   }
 )