Due to the complex constraints, more uncertain factors and critical real-time demand of path planning for unmanned combat aerial vehicle (UCAV), an approach of fast path planning based on Voronoi diagram and pre-evolution genetic algorithm (PEGA) is proposed, which makes use of the principle of hierarchical path planning. First the Voronoi diagram is utilized to generate the initial paths and c...

Sun-tracking microwave radiometry is a ground-based technique where the Sun is used as abeacon source. The atmospheric antenna noise temperature is measured by alternately pointingtoward-the-Sun and off-the-Sun according to a beam switching strategy. By properly developing an adhoc processing algorithm, we can estimate the atmospheric path attenuation in all-weather conditions.A...

The notorious middle two levels problem is to find a Hamilton cycle in the middle two levels, M2k+1, of the Hasse diagram of B2k+1 (the partially ordered set of subsets of a 2k + 1-element set ordered by inclusion). Previously, the best known result, due to Moews and Reid [11] in 1990, was that M2k+1 is Hamiltonian for all positive k through k = 11. We show that if a Hamilton path between two d...

Scalar field systems containing higher derivatives are studied and quan-tized by Hamiltonian path integral formalism. A new point to previous quantization methods is that field functions and their time derivatives are considered as independent canonical variables. Consequently, generating functional, explicit expressions of propagators and Feynman diagrams in φ 3 theory are found.

We consider the path length in decision diagrams for multiple-valued functions. This is an important measure of a decision diagram, since this models the time needed to evaluate the function. We focus on the average path length (APL), which is the sum of the path lengths over all assignments of values to the variables divided by the number of assignments. First, we show a multiple-valued functi...

Solar energy is one of the freely available renewable sources of energy and abundant in almost every part of the world. It is the most fundamental among the alternative sources of energy. With a view to collect energy from the sun, it is necessary to predict the sun position relative to the collection device. In this paper, an attempt has been taken to track the exact location of the sun for an...

This paper addresses the task assignment and path planning problem of multiple UAVs. As one of the strategies for a SEAD(Suppressions of Enemy Air Defense) mission, an efficiency strategy for assignment and path planning of homogeneous UAVs is developed. There are many path planning methods (e.g. potential function method or probabilistic roadmap method) to avoid obstacles, but the Voronoi diag...

For displaying a dense graph, an adjacency matrix is superior than a node-link diagram because it is more compact and free of visual clutter. A node-link diagram, however, is far better for the task of path finding because a path can be easily traced by following the corresponding links, provided that the links are not heavily crossed or tangled. We augment adjacency matrices with path visualiz...