The Rayleigh conjecture on the representation of the scattered field in the exterior of an obstacle D is widely used in applications. However this conjecture is false for some obstacles. AGR introduced the Modified Rayleigh Conjecture (MRC), and in this paper we present successful numerical algorithms based on the MRC for various 2D and 3D obstacle scattering problems. The 3D obstacles include ...

While multi-agent systems seem to provide a good basis for building complex software systems, this paper points out some of the drawbacks of classical “agent centered” multi-agent systems. To resolve these difficulties we claim that organization centered multi-agent system, or OCMAS for short, may be used. We propose a set of general principles from which true OCMAS may be designed. One of thes...

We introduce a systematic approach to the design, implementation and analysis of left-invariant evolution schemes acting on Gabor transform, primarily for applications in signal and image analysis. Within this approach we relate operators on signals to operators on Gabor transforms. In order to obtain a translation and modulation invariant operator on the space of signals, the corresponding ope...

We consider the experimental development of collaborating robots able to work within fields of crops. Specifically we investigate how AI principles can be applied to this agricultural domain and how the user should be involved in such a system. To support collaboration between agents a representation of responsibilities and dependencies is necessary. This is done by introducing groups and roles...

b. Nominative object: AGR P AGR ' s s 6 5 5 5 5 Spec AGR V NP PP s There 3PL are people at the door < LF movement c. Accusative object: AGR P AGR P AGR ' s o o 6 5 5 5 5 5 Spec Spec AGR V NP o John reads a book < LF movement In (1a), the "functional" head AGR enters into a double agreement relation s(ubject) with its specifier: the 0-features of the specifier are copied onto the head, and a Cas...

1. APPELMAN, CHARLES 0. and EATON, S. V. Evaluation of climatic temperature efficiency for the ripening processes in sweet corn. Jour. Agr. Research 20: 795-806. 1921. 2. SOMERS, G. FRED and HAMNER, KARL C. Phototubetype integrating light recorders: A summary of performance over a five-year period. Plant Physiol. 26: 318-330. 1951. 3. SPRAGUE, V. G. and WILLIAMS, E. M. An inexpensive light reco...

Gabor lters have been used extensively as a model of texture for image interpretation tasks. This paper demonstrates that when a bank of Gabor lters is applied to an image, there are strong relationships between the outputs of the di erent lters. These relationships are used to devise a new texture feature which is capable of describing texture information in a concise manner. Information about...

Orientation information is critical to the accuracy of ear recognition systems. In this paper, a new feature extraction approach is investigated for ear recognition by using orientation information of Gabor wavelets. The proposed Gabor orientation feature can not only avoid too much redundancy in conventional Gabor feature but also tend to extract more precise orientation information of the ear...

Wavefield extrapolation by spatially variable phase shift is currently a migration tool of importance. In this paper, we present a new prestack seismic migration algorithm using the Gabor transform with application to the Marmousi acoustic dataset. The imaging results show a very promising depth imaging algorithm, which is competitive with the best depth imaging algorithms. The Gabor depth imag...

In this paper, a hybrid segmentation method for detection of masses in digitized mammograms has been developed using three parallel approaches: adaptive thresholding method, Gabor filtering and fuzzy entropy feature as a CAD scheme. The algorithm consists of the following steps: a) Preprocessing of the digitized mammograms including identification of region of interest (ROI) as candidate for ma...