7,049 research outputs found
Mutually Uncorrelated Primers for DNA-Based Data Storage
We introduce the notion of weakly mutually uncorrelated (WMU) sequences,
motivated by applications in DNA-based data storage systems and for
synchronization of communication devices. WMU sequences are characterized by
the property that no sufficiently long suffix of one sequence is the prefix of
the same or another sequence. WMU sequences used for primer design in DNA-based
data storage systems are also required to be at large mutual Hamming distance
from each other, have balanced compositions of symbols, and avoid primer-dimer
byproducts. We derive bounds on the size of WMU and various constrained WMU
codes and present a number of constructions for balanced, error-correcting,
primer-dimer free WMU codes using Dyck paths, prefix-synchronized and cyclic
codes.Comment: 14 pages, 3 figures, 1 Table. arXiv admin note: text overlap with
arXiv:1601.0817
Semistable modifications of families of curves and compactified Jacobians
Given a family of nodal curves, a semistable modification of it is another
family made up of curves obtained by inserting chains of rational curves of any
given length at certain nodes of certain curves of the original family. We give
comparison theorems between torsion-free, rank-1 sheaves in the former family
and invertible sheaves in the latter. We apply them to show that there are
functorial isomorphisms between the compactifications of relative Jacobians of
families of nodal curves constructed through Caporaso's approach and those
constructed through Pandharipande's approach.Comment: 27 pages. arXiv admin note: substantial text overlap with
arXiv:1212.112
Integrality of hook ratios
We study integral ratios of hook products of quotient partitions. This
question is motivated by an analogous question in number theory concerning
integral factorial ratios. We prove an analogue of a theorem of Landau that
already applied in the factorial case. Under the additional condition that the
ratio has one more factor on the denominator than the numerator, we provide a
complete classification. Ultimately this relies on Kneser's theorem in additive
combinatorics.Comment: 13 pages, 3 figures Keywords: partitions, hook products, Kneser's
theorem, McKay numbers, Beurling-Nyman criterio
An ESPC algorithm based approach to solve inventory deployment problem
Global competitiveness has enforced the hefty industries to become more customized. To compete in the market they are targeting the customers who want exotic products, and faster and reliable deliveries. Industries are exploring the option of satisfying a portion of their demand by converting strategically placed products, this helps in increasing the variability of product produced by them in short lead time. In this paper, authors have proposed a new hybrid evolutionary algorithm named Endosymbiotic-Psychoclonal (ESPC) algorithm to determine the amount and type of product to stock as a semi product in inventory. In the proposed work the ability of previously proposed Psychoclonal algorithm to exploit the search space has been increased by making antibodies and antigen more cooperative interacting species. The efficacy of the proposed algorithm has been tested on randomly generated datasets and the results obtained, are compared with other evolutionary algorithms such as Genetic Algorithm (GA) and Simulated Annealing (SA). The comparison of ESPC with GA and SA proves the superiority of the proposed algorithm both in terms of quality of the solution obtained, and convergence time required to reach the optimal /near optimal value of the solution
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