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When distribution system with non-effectively grounded neutral occurs ground fault, the fault current is very small in amplitude, so the faulted location identification accurately is very difficult. To solve this problem, a new algorithm of travelling wave fault location in ddistribution line based on improved morphological gradient is adopted. The algorithm selects transient current travelling wave...
This paper proposes a practical static analysis tool named LUKE, for detecting null pointer dereferences (NPD) in C programs. LUKE first uses a guarded value-dependence graph (VDG) to track the dependence relations of values, and then detects NPD by solving the graph reachability problem on its VDG. To improve accuracy as well as scalability, the detection algorithm leverages heuristic inference algorithms...
In solving volume integral equations by method of moments with multilevel fast multipole algorithm (MLFMA) acceleration, the memory and time consumption for near group impedance elements calculation is huge, especially for high contrast dielectric targets or multiscale targets. The method of multilevel accelerated Cartesian expansions algorithm combined with MLFMA is employed to enhance the capability...
In this paper, a fast solver for low-frequency problem is presented. In this solver, multilevel Accelerated Cartesian expansions (MLACE) algorithm and augmented electric field integral equation (A-EFIE) are used. A-EFIE is employed because it is stable in low-frequency. In addition, since A-EFIE is based on the idea of separating the vector potential and the scalar potential, more accurate and efficient...
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