We construct a class of numerical schemes for the Liouville equation of geometric optics coupled with the Geometric Theory of Diffractions to simulate the high frequency linear waves with a discontinuous index of refraction. In the work [26], a Hamiltonian-preserving scheme for the Liouville equation was constructed to capture partial transmissions and reflections at the interfaces. These schem...

This paper describes our system for the task of extracting frame semantic structures in SemEval–2007. The system architecture uses two types of learning models in each part of the task: Support Vector Machines (SVM) and Maximum Entropy (ME). Designed as a pipeline of classifiers, the semantic parsing system obtained competitive precision scores on the test data.

This paper presents GTD-POP, a planning methodology based on the Generate, Test and Debug paradigm. GTD-POP's goal is to achieve a compromise between planning eeciency and soundness by using associ-ational knowledge to guide its search for interaction checks in a partially-ordered plan. This paper describes the GTD-POP and discusses issues involved in evaluating the behavior of practical planners.

This paper presents our Complex Answer PAragraph Retrieval (CAPAR) system designed for our participation in the TREC Complex Answer Retrieval (CAR) track. Because we were provided with a massive training set consisting of complex questions as well as the paragraphs that answered each aspect of the complex question, we cast the paragraph ranking as a learning to rank (L2R) problem, such that we ...

We have investigated two kinds of hybrid methods for the electromagnetic scattering problem in the mid-frequency range. These are, a current-based approximation to the Magnetic Field Integral Equation called Physical Optics (PO) and the ray-based method Geometrical Theory of Diiraction (GTD), both combined with the Method of Moments (MM) such that MM is used on details that are small compared t...

In this paper, radio wave propagation over irregular terrain is investigated in 200–600MHz (VHF/UHF band). Measured results are compared with different path loss models such as Fresnel knife edge diffraction and uniform theory of diffraction (UTD). It is shown that, for low antenna heights, using a combination of the two-ray path loss model and knife-edge diffraction, great improvement in path ...

In this paper we present a semantic architecture that was employed for processing two different SemEval 2007 tasks: Task 4 (Classification of Semantic Relations between Nominals) and Task 8 (Metonymy Resolution). The architecture uses multiple forms of syntactic, lexical, and semantic information to inform a classification-based approach that generates a different model for each machine learnin...

978-981-4273-22-0(ebook) US$124 COMPACT HIERARCHICAL BIPOLAR TRANSISTOR MODELING WITH HICUM Dr. Michael Schroter received his electrical engineering Ph.D. in 1988 from the Ruhr-University Bochum, Germany. He was with Nortel, Ottawa, Canada, as Team Leader and Advisor until 1996 when he joined Rockwell (now Conexant), Newport Beach, California, where he managed the RF Device Modeling Group. Dr. ...

This document is part of original research work by the authors in a bid to explore new fields for applying Data Mining Techniques. The sample data is part of a large data set from University of Maryland (UMD) and outlines how more meaningful patterns can be discovered by preprocessing the data in the form of OLAP