1. Create DBN
2. Generate time expansion
3. Compile and use
Netica has unique DBN capabilities not available with any other software. Different links may have different time delays, so that when the network is expanded, time slices may have a different structure from each other. In the expanded net, Netica will replicate nodes at a frequency that is appropriate to model the dynamic situation modeled by the DBN. Some nodes will appear only once in the expanded net (corresponding to variables whose values don't change over time), some nodes will appear a few times (for slowly changing variables), and others will appear many times (for quickly changing variables).
When entering the delay amount for a link, you can enter a number (most common is simply 1), or the value of a constant node, or an equation based on the values of one or more constant nodes. Links with time delays are displayed in a reddish-brown color.
To set the time delay of several links to the same value, select the links, and choose Modify → Delay Links, or right-click the selection and choose Delay. You will then have the chance to enter the delay you would like them all to have. If you make the delay 0, they will become regular links.
Another way to set link delays is from a node properties dialog. Choose Delay from the multipurpose selector at the bottom, and you can enter a delay amount for each link entering the node.
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