Time Localization of Abrupt Changes in Cutting Process using Hilbert Huang Transform

Cutting process is extremely dynamical process influenced by different phenomena such as chip formation, dynamical responses and condition of machining system elements. Different phenomena in cutting zone have signatures in different frequency bands in signal acquired during process monitoring. The time localization of signal’s frequency content is very important. An emerging technique for simultaneous analysis of the signal in time and frequency domain that can be used for time localization of frequency is Hilbert Huang Transform (HHT). It is based on empirical mode decomposition (EMD) of the signal into intrinsic mode functions (IMFs) as simple oscillatory modes. IMFs obtained using EMD can be processed using Hilbert Transform and instantaneous frequency of the signal can be computed. This paper gives a methodology for time localization of cutting process stop during intermittent turning. Cutting process stop leads to abrupt changes in acquired signal correlated to certain frequency band. The frequency band related to abrupt changes is localized in time using HHT. The potentials and limitations of HHT application in machining process monitoring are shown

INNOVATIVE DEVELOPMENT OF RESOURCE-SAVING TECHNOLOGIES AND SUSTAINABLE USE OF NATURAL RESOURCES. 5rd INTERNATIONAL SCIENTIFIC AND TECHNICAL CONFERENCE

UNIVERSITAS Publishing National University of Water and Environmental Engineerin

Best Available Techniques (BAT) Reference Document for the Management of Waste from Extractive Industries in accordance with Directive 2006/21/EC

This document, Best Available Techniques Reference Document for the Management of Waste from Extractive Industries, in accordance with Directive 2006/21/EC, abbreviated as MWEI BREF, is a review of the Reference Document for Management of Tailings and Waste-Rock in Mining Activities (MTWR BREF). This review is the result of an exchange of information between experts from EU Member States, industries concerned, non-governmental organisations promoting environmental protection and the European Commission. The reviewed document presents up-dated data and information on the management of waste from extractive industries, including information on BAT, associated monitoring, and developments in them. It is published by the European Commission pursuant Article 21(3) of Directive 2006/21/EC on the management of waste from extractive industries. This document presents data and information on the following: - General information and key figures on extractive industries in Europe, extractive waste generation, extractive waste facilities and key environmental issues (Chapter 1). - Applied processes and techniques for the management of extractive waste (Chapter 2). - Emission and consumption levels resulting from the management of extractive waste (Chapter 3). - Techniques to consider in the determination of Best Available Techniques (Chapter 4). This includes generic management and waste hierarchy techniques, risk-specific techniques to ensure safety, techniques for the prevention or minimisation of water status deterioration, techniques for the prevention or minimisation of air and soil pollution and other risk-specific techniques. - Best available techniques conclusions (Chapter 5). - Emerging techniques (Chapter 6). This includes techniques that were reported at different levels of technology readiness. - Remarks and recommendations for future work (Chapter 7).JRC.B.5-Circular Economy and Industrial Leadershi

IKUWA6. Shared Heritage

Celebrating the theme ‘Shared heritage’, IKUWA6 (the 6th International Congress for Underwater Archaeology), was the first such major conference to be held in the Asia-Pacific region, and the first IKUWA meeting hosted outside Europe since the organisation’s inception in Germany in the 1990s. A primary objective of holding IKUWA6 in Australia was to give greater voice to practitioners and emerging researchers across the Asia and Pacific regions who are often not well represented in northern hemisphere scientific gatherings of this scale; and, to focus on the areas of overlap in our mutual heritage, techniques and technology. Drawing together peer-reviewed presentations by delegates from across the world who converged in Fremantle in 2016 to participate, this volume covers a stimulating diversity of themes and niche topics of value to maritime archaeology practitioners, researchers, students, historians and museum professionals across the world