Abstract: A system for modeling networks of electricity supply and demand includes a first user interface, a second user interface, a database, a controller, and a memory including instructions. The database includes a data set defining nodes and domains, each node being a geographic area with defined electricity supply and demand, each plan including instructions related to a node for managing energy infrastructure and supply and demand changes. The controller is configured to: receive a first request to create a first plan for a first node of a collection; receive plan instructions for the first plan; receive a second user request to create a second plan for a second node of the collection; receive a plan instruction to interconnect the first node with the second node in the first plan; generate a forecast including a projected value for an energy infrastructure variable; and display the forecast.

Abstract: A system for modeling networks of electricity supply and demand includes a first user interface, a second user interface, a database, a controller, and a memory including instructions. The database includes a data set defining nodes and domains, each node being a geographic area with defined electricity supply and demand, each plan including instructions related to a node for managing energy infrastructure and supply and demand changes. The controller is configured to: receive a first request to create a first plan for a first node of a collection; receive plan instructions for the first plan; receive a second user request to create a second plan for a second node of the collection; receive a plan instruction to interconnect the first node with the second node in the first plan; generate a forecast including a projected value for an energy infrastructure variable; and display the forecast.

Abstract: A compact step tuned filter (30, FIG. 6), is provided for passing two or more widely separated microwave frequencies and providing high rejection to signals below the passband, and is particularly useful in miniaturized light weight airborne step tuned mixers and the like. The filter includes input and output sets (39-40, 41-42) of parallel coupled transmission lines providing lumped element capacitors at the lower frequency and matched transmission lines at the higher frequency, and a central transmission line connected between the input and output sets of coupled lines and providing a resonator between the lumped element capacitors at the lower frequency and a matched transmission line at the higher frequency.