For the general CSP, we design a polynomial heuristic which is a combination of our proposed approximation algorithm LDDA ([10] Liu Xiaolan, Fu Keqiang, Shao Renxiang. Largest distance decreasing algorithm for
At the end, the algorithm outputs the best-found solutions Sol_best, its set of selected bus services SelectedBS_best and its number of selected bus services b. The Heuristic 1 algorithm is obtained by using in line 3 of the GRASP algorithm the Greedy Randomized procedure previously described...
[9] showed how Park's k-medoid heuristic [20] and González's k-centers 2-approximation algorithm can be adapted to find k medoids or centers, respectively. How- ever, these algorithms have running times of the form O(nk+3 log n) rendering them viable only for small val- ues of k....
The values were found by Thomas Odenthal using a branch and bound algorithm [16]. The leftmost 'comb', C, is a sub-graph of the mesh defined as a graph induced by the first two columns without the edges of the second column. Similarly we define the rightmost comb. Let us call the ...
5 Exact geodesic between two vertices Our goal is to find the geodesic path between a source vertex vs and a target vertex vt on the mesh. Note that it is inefficient to run our exact algorithm on the entire mesh (or even until reaching vt). In this section we present an algorithm ...
We precisely describe a corresponding algorithm as well as its efficient implementation on top of decision diagrams. Experimental results confirm the resulting benefits and show improvements of up to several orders of magnitudes in costs compared to previous work....
astronomical size (i.e., the search space increases super-exponentially with the number of taxa [26]). Moreover, this landscape has typically numerous local optima that can easily trap heuristic approaches [27]. So far, these local search heuristics lack any provable correctness or precision [...
aAnexact algorithm whose running time is polynomial for any fixed number of retailers, and a linear-programming-based heuristic whose effectiveness is demonstrated in a series of com-putational experiments. 运行时间为所有fi是多项的Anexact算法xed贩商的数字和有效率被展示参加一系列计算实验的一基于...
VLSI/ heuristic algorithmexact algorithm2D stripbin packing problem2D packing problemidentical binscutting glassvery-large-scale integration designIn this paper, we consider a two-dimensional (2D) packing problem. It consists of packing a given set of rectangular items either into a strip with a ...
Importantly, the algorithm is not heuristic and provides the exact solution within a reasonable amount of time. It is implemented using efficient SQL table joins and queries. Download: Download high-res image (191KB) Download: Download full-size image Algorithm 1. Identify pairwise shareable FIFO...