Basic operation[ edit ] Class-D amplifiers work by generating a train of square pulses of fixed amplitude but varying width and separation, or varying number per unit time, representing the amplitude variations of the analog audio input signal.
The paper discusses PHM as a principle that includes health assessment, prediction and management. Abstract Much research has been conducted in prognostics and health management PHMan emerging field in mechanical engineering that is gaining interest from both academia and industry. Most of these efforts have been in the area of machinery PHM, resulting in the development of many algorithms for this particular application.
The majority of these algorithms concentrate on applications involving common rotary machinery components, such as bearings and gears. Knowledge of this prior work is a necessity for any future research efforts to be conducted; however, there has not been a comprehensive overview that details previous and on-going efforts in PHM.
In addition, a systematic method for developing and deploying a PHM system has yet to be established. Such a method would enable rapid customization and integration of PHM systems for diverse applications. To address these gaps, this paper provides a comprehensive review of the PHM field, followed by an introduction of a systematic PHM design methodology, 5S methodology, for converting data to prognostics information.
This methodology includes procedures for identifying critical components, as well as tools for selecting the most appropriate algorithms for specific applications. Visualization tools are presented for displaying prognostics information in an appropriate fashion for quick and accurate decision making.
Industrial case studies are included in this paper to show how this methodology can help in the design of an effective PHM system. Previous article in issue.The paper discusses PHM as a principle that includes health assessment, prediction and management.
• The research provides a comprehensive overview of PHM tools for critical machinery components. Design and Implementation of Speech Recognition Systems Spring Bhiksha Raj, Rita Singh Class 1: Introduction – Speaker dependent, isolated word recognition • –Large vocabulary, real-time continuous speech recognition •Any speech recognition system is, at its core, some version of this simple scheme.
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System Design This design of the application of speaker recognition system is closed set text-dependent identification.
Were measured by collecting and analyzing the voice signal, the system can identify the identity of the persons registered. The Partners: Higher Education Authority – HEA. The HEA leads the strategic development of the Irish higher education and research system with the objective of creating a coherent system of diverse institutions with distinct missions, which is responsive to the social, cultural and economic development of Ireland and its people and supports the achievement of national objectives.
2. Basic Concept Behind Speaker Recognition The main principle behind the speaker recognition system is that of feature extraction and matching.
Feature extraction deals with the extraction or reading of important characteristics or feature from a .