This relation, mentioned above as indispensability (a-vinā-bhāva), and later known as pervasion (vyāpti), can be defined in terms of the occurrence relation.
There is no need to enumerate the occurrences of pattern P on T (i.e., to compute the occurrence relation OC).
As an example, in Fig. 2c, the second and third columns give the occurrence relation and the node occurrence lists, respectively, of the pattern P on the tree T of Fig. 2a.
Miettinen explains that "an empirical relation is not distorted by any manipulation of the distribution of the study base according to the elements in the occurrence relation - the determinant, the modifiers and/or confounders.
In general, adjustment for age and gender in model 2 altered the effect estimates substantially, whereas the impact that systolic blood pressure, smoking and type 2 diabetes had on the occurrence relation was relatively small.
And then, it calculates the score for the sentences using the title of the document, Semantic Sentence Similarity utility and n-gram Co-Occurrence relations of the words in a particular sentence.
Information Loss The co-occurrence-based methods heavily depend on the co-occurrence relations between two words.
The co-occurrence-based methods heavily depend on the co-occurrence relations between two words in the input document, which may ignore many semantic relations.
In the co-occurrence based graph (i.e., the keyterm graph is built according to the co-occurrence relations of words), words with larger tf (term frequency) tend to have larger vertex degrees.
The co-occurrence-based methods, e.g., SW [10], TextRank [22], ExpandRank [31], CM [3], build a word co-occurrence graph exploiting the word co-occurrence relations that are obtained from the input document, and then apply some ranking algorithms such as PageRank [24] and betweenness [6] on the graph to get the ranking score of each word.
It is reasonable to believe that there is a significant difference between the two groups in their performance that is, the statistical evidence suggests that there are some co-occurrence relations between curatable and non-curatable articles.
