Connected Post-Wall (C-PW) Waveguide for Efficient Design of Broad Wall Slots by Using Equivalent Solid-Wall Waveguide

Background:: In recent years, there has been a high demand for executing digital signal processing and machine learning applications on energy-constrained devices. Squaring is a vital arithmetic operation used in such applications. Hence, improving the energy efficiency of squaring is crucial. Objective:: In this paper, a novel approximation method based on piecewise linear segmentation of the square function is proposed. Methods: Two-segment, four-segment and eight-segment accurate and energy-efficient 32-bit approximate designs for squaring were implemented using this method. The proposed 2-segment approximate squaring hardware showed 12.5% maximum relative error and delivered up to 55.6% energy saving when compared with state-of-the-art approximate multipliers used for squaring. Results: The proposed 4-segment hardware achieved a maximum relative error of 3.13% with up to 46.5% energy saving. Conclusion:: The proposed 8-segment design emerged as the most accurate squaring hardware with a maximum relative error of 0.78%. The comparison also revealed that the 8-segment design is the most efficient design in terms of error-area-delay-power product.

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Migration of a solid conducting sphere immersed in a liquid metal near a plane conducting solid wall under the action of uniform ambient electric and magnetic fields

Magnetohydrodynamics ◽

10.22364/mhd.42.2-3.24 ◽

2006 ◽

Vol 42 (2-3) ◽

pp. 317-326 ◽

Cited By ~ 1

Keyword(s):

Magnetic Fields ◽

Liquid Metal ◽

Solid Wall ◽

Conducting Sphere ◽

Electric And Magnetic Fields

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Efficient design of a successful PROFIBUS project

IET Water Event 2007 ◽

10.1049/ic:20070564 ◽

2007 ◽

Author(s):

M. Cargill

Keyword(s):

Efficient Design

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Ultrasonic Torsion Welding of Aging Resistant Al/CFRP Joints - Concepts, Mechanical and Microstructural Properties

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.742.395 ◽

2017 ◽

Vol 742 ◽

pp. 395-400 ◽

Cited By ~ 1

Author(s):

Florian Staab ◽

Frank Balle ◽

Johannes Born

Keyword(s):

Mechanical Properties ◽

Process Parameters ◽

Materials Science ◽

Dissimilar Materials ◽

Material Design ◽

Ultrasonic Welding ◽

Fatigue Properties ◽

Aviation Industry ◽

Efficient Design ◽

Engineering Structures

Multi-material-design offers high potential for weight saving and optimization of engineering structures but inherits challenges as well, especially robust joining methods and long-term properties of hybrid structures. The application of joining techniques like ultrasonic welding allows a very efficient design of multi-material-components to enable further use of material specific advantages and are superior concerning mechanical properties.The Institute of Materials Science and Engineering of the University of Kaiserslautern (WKK) has a long-time experience on ultrasonic welding of dissimilar materials, for example different kinds of CFRP, light metals, steels or even glasses and ceramics. The mechanical properties are mostly optimized by using ideal process parameters, determined through statistical test planning methods.This gained knowledge is now to be transferred to application in aviation industry in cooperation with CTC GmbH and Airbus Operations GmbH. Therefore aircraft-related materials are joined by ultrasonic welding. The applied process parameters are recorded and analyzed in detail to be interlinked with the resulting mechanical properties of the hybrid joints. Aircraft derived multi-material demonstrators will be designed, manufactured and characterized with respect to their monotonic and fatigue properties as well as their resistance to aging.

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