This article is devoted to propose some lower and upper bounds for the coupled-tasks scheduling problem in presence of compatibility constraints according to classical complexity hypothesis (P 6 = NP , ET H). Moreover, we develop an efficient polynomial-time approximation algorithm for the specific case for which the topology describing the compatibility constraints is a quasi split-graph.

A quasi-distributed fiber sensor system for smart-structure applications is proposed. The system is based on a fiber loop topology and interrogated by use of white-light interferometry. The results of preliminary experiments and a power budget analysis are presented.

We study topology optimization in quasi-static plasticity with linear kinematic and isotropic hardening using a level-set method. consider the primal variational formulation for problem. This is subjected to penalization regularization, resulting an approximate problem that shape-differentiable. The shape derivative computed adjoint Thanks proposed time discretization of proved be well-posed. F...

Considering a commutative unital quantale L as the truth value table and using the tool of L-generalized convergence structures of stratified L-filters, this paper introduces a kind of fuzzy upper topology, called fuzzy S-upper topology, on L-preordered sets. It is shown that every fuzzy join-preserving L-subset is open in this topology. When L is a complete Heyting algebra, for every completel...

<p>Let R be a commutative ring with identity and M unitary R-module. The primary-like spectrum Spec<sub>L</sub>(M) is the collection of all submodules Q M, recent generalization primary ideals, such that M/Q primeful In this article, we topologies patch-like topology, show when, topology quasi-compact, Hausdorff, totally disconnected space.</p>

in this paper‎, ‎we introduce a new model of point free topology‎ ‎for point-set topology‎. ‎we study the basic concepts in this‎ ‎structure and will find that it is naturally close to point-set‎ ‎topology‎.‎

We consider the Zariski space of all places of an algebraic function field F |K of arbitrary characteristic and investigate its structure by means of its patch topology. We show that certain sets of places with nice properties (e.g., prime divisors, places of maximal rank, zerodimensional discrete places) lie dense in this topology. Further, we give several equivalent characterizations of field...

An improved topology of a voltage-fed quasi-resonant soft switching LCrCdc series-parallel half bridge inverter with a constant-frequency for electronic ballast applications is proposed in this paper. This new topology introduces a low-cost solution to reduce switching losses and circuit rating to achieve high-efficiency ballast. Switching losses effect on ballast efficiency is discussed throug...

Nodal-line semimetals (NLSMs) contains Dirac/Weyl type band-crossing nodes extending into shapes of line, loop and chain in the reciprocal space, leading to novel band topology transport responses. Robust NLSMs against spin-orbit coupling typically occur three-dimensional materials with more symmetry operations protect line crossing, while possibilities lower-dimensional are rarely discussed. H...