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Route inspection problem (also called Chinese postman problem) for mixed graphs (having both directed and undirected edges). The program is solvable in polynomial time if the graph has all undirected or all directed edges. Variants include the rural postman problem. [3]: ND25, ND27 Clique cover problem [2] [3]: GT17
When the problem calls for a minimal traversal of a digraph (or multidigraph) it is known as the "New York Street Sweeper problem." [13] The k-Chinese postman problem: find k cycles all starting at a designated location such that each edge is traversed by at least one cycle. The goal is to minimize the cost of the most expensive cycle.
The mixed Chinese postman problem (MCPP or MCP) is the search for the shortest traversal of a graph with a set of vertices V, a set of undirected edges E with positive rational weights, and a set of directed arcs A with positive rational weights that covers each edge or arc at least once at minimal cost. [1]
The law of experience refers to the observation that the variety of states exhibited by a deterministic machine in isolation cannot increase, and a set of identical machines fed the same inputs cannot exhibit increasing variety of states, and tend to synchronize instead. [5] Some name is necessary by which this phenomenon can be referred to.
The digital representation of these networks, and the methods for their analysis, is a core part of spatial analysis, geographic information systems, public utilities, and transport engineering. Network analysis is an application of the theories and algorithms of graph theory and is a form of proximity analysis.
The study, which was just published in the American Chemical Society’s journal Environmental Science & Technology Letters, found that some smartwatch and fitness tracker bands may expose the ...
A bride and groom can't agree on the size of their wedding — so they've decided to each plan their own event. In a post on Reddit's "Wedding Shaming" forum, a user shared that their sister-in ...
Previous research using seismology found that a large reservoir of magma sat beneath the caldera. However, the recent study, using a method known as magnetotellurics that tracks the electric ...