نتایج جستجو برای: travelling time
تعداد نتایج: 1898885 فیلتر نتایج به سال:
Many oscillatory biological systems show periodic travelling waves. These are often modelled using coupled reaction–diffusion equations. However, the effects of different movement rates (diffusion coefficients) of the interacting components on the predictions of these equations are largely unknown. Here we investigate the ways in which varying the diffusion coefficients in such equations alters...
We consider situations where rays are reflected according to geometrical optics by a set of unknown obstacles. The aim is recover information about the obstacles from travelling-time data using methods and observations singularities. Suppose that, for disjoint union finitely many strictly convex smooth in Euclidean plane, no line meets more than two them. then give construction complete recover...
In this paper, the modified simplest equation method is successfully implemented to find travelling wave solutions of the generalized forms $B(n,1)$ and $B(-n,1)$ of Burgers equation. This method is direct, effective and easy to calculate, and it is a powerful mathematical tool for obtaining exact travelling wave solutions of the generalized forms $B(n,1)$ and $B(-n,1)$ of Burgers equation and ...
The survey tires to review the sensor dispatch in wireless sensor network. The wireless sensor networks contain static nodes and mobile nodes. In this paper we discuss movement of multi attribute mobile path and the issues of travelling path of mobile sensor. Mobility in wireless sensor networks is controllable and cooperative. The mobile sensor dispatch to the event location without any obstac...
The free clustered travelling salesman problem (FCTSP) is an extension of the classical travelling salesman problem where the set of vertices is partitioned into clusters, and the task is to find a minimum cost Hamiltonian tour such that the vertices in any cluster are visited contiguously. This paper proposes the use of a memetic algorithm (MA) that combines the global search ability of Geneti...
The time budget of five male and four female European polecats was studied in western France through radiotracking surveys. Their activity level averaged 7 h and 31 min without any significant differences between males and females. However two phases, foraging and travelling, were not similarly distributed in both sexes. Despite a strong sexual dimorphism, females spent more time foraging than ...
A polyhedral study of the asymmetric travelling salesman problem with time windows Abstract The asymmetric travelling salesman problem with time windows (ATSP-TW) is a basic model for scheduling and routing applications. In this paper we present a formulation of the problem involving only 0/1-variables associated with the arcs of the underlying digraph. This has the advantage of avoiding additi...
The structure of the surface layers of the Sun is changed by magnetic activity which, in turn, changes the eigen-frequencies of the acoustic modes. These frequency shifts have been observed both in low-and high-degree data, and are found to be correlated with the solar cycle. Time-distance helioseismology has shown that waves travelling through sunspots suffer time delays. Also it is known that...
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