Westinghouse Electric

About: Westinghouse Electric is a company organization based out in Cranberry Township, Pennsylvania, United States. It is known for research contribution in the topics: Brake & Signal. The organization has 27959 authors who have published 38036 publications receiving 523387 citations.

Method for automatically identifying targets in sonar images

Abstract: To detect and classify features in a sonar image comprised of a matrix of pixels each pixel having a known greyness level a set of windows is defined such that each window is comprised of a set of adjacent pixels such that every pixel of the image is included in at least one window. Properties of the greyness level for the pixels in each window are defined to enable selection of those windows having specific features of greyness level in excess of a predetermined threshold. Matched filter correlations are performed on the pixels in the selected windows to identify highlights and shadows. The identifying highlights and shadows are classified as targets, anomalies or background.

Chapter 1 – Cognitive Systems Engineering

Abstract: Publisher Summary This chapter discusses the cognitive systems engineering. To build a cognitive description of a problem solving world, it is necessary to understand how representations of the world interact with different cognitive demands imposed by the application world in question and with characteristics of the cognitive agents, both for existing and prospective changes in the world. Building a cognitive description is part of a problem driven approach to the application of computational power. In tool-driven approaches, knowledge acquisition focuses on describing domain knowledge in terms of the syntax of computational mechanisms, that is, the language of implementation is used as a cognitive language. Semantic questions are displaced either to whoever selects the computational mechanisms or to the domain expert who enters knowledge. The alternative is to provide an umbrella structure of domain semantics that organizes and makes explicit what particular pieces of knowledge mean about problem solving in the domain. Acquiring and using domain semantics is essential to be capable of avoiding potential errors and specifying performance boundaries when building intelligent machines.

Electrical discharge device

Abstract: This invention relates to discharge devices and has particular reference to electrodes therein. An object .of this invention is to provide improved electrode formation and arrangement in discharge devices. Another object is to provide a self-starting discharge lamp. Another object is to provide...

Particle-Initiated Breakdown Between Coaxial Electrodes in Compressed SF6

Abstract: The influence of conducting particles on the ac breakdown of compressed SF6 has been investigated for two coaxial systems having inner electrodes of diameter 75 mm and 150 mm and a 250 mm diameter outer electrode, using voltages up to 450 kV rms at pressures up to 1.8 MNm?2 (18 atm.). For filamentary particles of 0.1 mm or 0.4 mm diameter wire, there was a maximum breakdown voltage at 0.4 MNm?2 (4 atm.) which became more pronounced with increasing particle length and decreasing particle diameter. No maximum was observed with spherical particles but for each system there was a critical sphere size which gave the lowest breakdown voltage at a given pressure. There was also a slight density effect at the lower pressures, aluminum spheres producing lower breakdown voltages than spheres of brass or steel. Tests with wires and spheres fixed to the inner conductor, to simulate breakdown initiated by field enhancement at particles migrating to the inner, gave ac and impulse results which differed from the free-particle ac breakdown voltages. Calculations have been made of the motion of spherical particles and of the energy in microdischarges at the electrodes; the particles can make excursions lasting several cycles and this may be important in creating optimum conditions for breakdown.

Mixed powder deposition of components for wear, erosion and abrasion resistant applications

Abstract: An abrasive coating and a process for forming the abrasive coating by co-depositing hard particles within a matrix material onto a substrate using a cold spray process. The cold sprayed combination of hard particles and matrix material provides a coating that is wear, erosion and oxidation resistant. The abrasive coating may have different compositions across its depth. The hard particles may be deposited at different densities across the thickness of the matrix material. A first layer of the abrasive coating proximate the surface of the substrate may be devoid of hard particles.