Since the problem of finding a shortest synchronizing sequence for an automaton is known to be NP-hard, heuristics algorithms are used to find synchronizing sequences. There are several heuristic algorithms in
与这种匹配策略不同的是,如图3左侧所示,我们希望通过评估将一个序列转换为另一个序列所需的最小代价来确定两个序列在结构上是否相似。天真的想法是详尽地比较所有可能的转换,这是NP-hard。一种快速的解决方案是利用可解决的动态规划技术,其中子问题可以递归地嵌套在更大的问题中。这里,受计算语言学和计算机科学的中...
This NP-completeness holds even for a restricted case where the length of each person's preference list is at most two and ties appear in only men's preference lists. To complement this intractability, we show that if each man’s preference list contains at most one woman (but women’s p...
“Chip-firing games on Eulerian digraphs and NP-hardness of computing the rank of a divisor on a graph” by Viktor Kiss and Lilla Tothmeresz: Computing the rank of a divisor on a graph is NP-hard. “3SUM Hardness in (Dynamic) Data Structures” by Tsvi Kopelowitz, Seth Pettie, and Ely...
Although this technique is perfectly appropriate for theoretical investigations, this measurement is hard to implement in hardware circuits. Instead, here, we make use of the detector circuit of Fig. 2(a), originally proposed in ref. 51, which uses basic logic counter circuits approximating the...
Abstract Although discriminative motif discovery (DMD) methods are promising for eliciting motifs from high-throughput experimental data, due to consideration of computational expense, most of existing DMD methods have to choose approximate schemes that greatly restrict the search space, leading to signific...
这一部分主要是针对数据预处理的了解create_patches_fp.py中获取patch的方法和具体流程 该步骤的目的是讲WSI分割成固定大小的patch,将这些patch作为一个WSI的候选特征图。 这样就解决了超大的WSI图片无法训练的问题 Step-01: imports # imports# 这一部分都是基础包,不需要讲解importosimportnumpyasnpimporttimeimport...
Mott insulator, which is characterized by a hard gap ∆ in the distribution of pinning energies g(e) near the chem- ical potential µ, exists only for extremely short–range interactions λ/d → 0 (Fig. 1, left inset); with increasing ...
What is the complexity of the problem of finding an SSNM with the minimum number of crossings, and if it is NP-hard, is there a good approximation 13 Algorithmica (2021) 83:2678–2696 2695 algorithm for it? Also, it might be interesting to consider noncrossing stable match- ings for ...
We consider the problem of partitioning the set of vertices of a given unit disk graph (UDG) into a minimum number of cliques. The problem is NP-hard and various constant factor approximations are known, with the best known ratio of 3. Our main result is