Invention Grant
US09176732B2 Method and apparatus for minimum cost cycle removal from a directed graph
有权
从有向图中最小成本周期去除的方法和装置
- Patent Title: Method and apparatus for minimum cost cycle removal from a directed graph
- Patent Title (中): 从有向图中最小成本周期去除的方法和装置
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Application No.: US14012799Application Date: 2013-08-28
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Publication No.: US09176732B2Publication Date: 2015-11-03
- Inventor: Ashutosh Chakraborty , Wonjoon Choi , Duo Ding , Rajendran Panda
- Applicant: Oracle International Corporation
- Applicant Address: US CA Redwood City
- Assignee: Oracle International Corporation
- Current Assignee: Oracle International Corporation
- Current Assignee Address: US CA Redwood City
- Agency: Polsinelli PC
- Main IPC: G06F9/44
- IPC: G06F9/44 ; G06F11/36 ; G06F9/45 ; G06F17/50

Abstract:
Implementations of the present disclosure involve a system and/or method for minimum cost cycle removal from a directed graph. The system determines if a provided graph contains any cycles by assigning each vertex an integer value and comparing the integer values of vertices connected by an edge. When the value of a starting vertex is greater than an ending vertex, a cycle is present. The system then determines which edges may be removed in order to minimize the cost of breaking the cycle. The system generates a linear cost function that is equal to the sum of a cost to remove an edge multiplied by a corresponding binary variable. Constraints are generated to ensure that the result does not have any cycles. The system then solves for the minimum of the linear cost function by utilizing the constraints. The value of the binary variables may then be used to determine which edges to remove.
Public/Granted literature
- US20150067644A1 METHOD AND APPARATUS FOR MINIMUM COST CYCLE REMOVAL FROM A DIRECTED GRAPH Public/Granted day:2015-03-05
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