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# bidirected造句

### 例句与造句

1. The latter are bidirected graphs, not directed graphs ( except in the trivial case of all positive signs ).
2. Thus, the presence of latent variables is taken into account through the correlations they induce between the error terms, as represented by bidirected arcs.
3. For the correspondence between bidirected graphs and skew-symmetric graphs ( i . e ., their double covering graphs ) see, Section 5, or.
4. The " directed " edges are the same as ordinary directed edges in a directed graph; thus, a directed graph is a special kind of bidirected graph.
5. However, if the graph author suspects that the error terms of any two variables are dependent ( e . g . the two variables have an unobserved or latent common cause ) then a bidirected arc is drawn between them.
6. It's difficult to find bidirected in a sentence. 用bidirected造句挺难的
7. Skew-symmetric graphs were first introduced under the name of " antisymmetrical digraphs " by, later as the double covering graphs of polar graphs by, and still later as the double covering graphs of bidirected graphs by.
8. A closely related concept is the bidirected graph of ( " polarized graph " in the terminology of, ), a graph in which each of the two ends of each edge may be either a head or a tail, independently of the other end.
9. This confounding is depicted in the Figures 1-3 on the right through the bidirected arc between Tutoring Program and GPA . If students are assigned to dormitories at random, the proximity of the student's dorm to the tutoring program is a natural candidate for being an instrumental variable.
10. A bidirected graph may be interpreted as a polar graph by letting the partition of edges at each vertex be determined by the partition of endpoints at that vertex into heads and tails; however, swapping the roles of heads and tails at a single vertex ( " switching " the vertex, in the terminology of ) produces a different bidirected graph but the same polar graph.
11. A bidirected graph may be interpreted as a polar graph by letting the partition of edges at each vertex be determined by the partition of endpoints at that vertex into heads and tails; however, swapping the roles of heads and tails at a single vertex ( " switching " the vertex, in the terminology of ) produces a different bidirected graph but the same polar graph.