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A New Method of Voiced/Unvoiced Classification Based on Clustering

Journal of Signal and Information Processing 2011年第4期2卷 336-347页

作者： Mojtaba Radmard mahdi hadavi Mohammad mahdi Nayebi Department of Electrical Engineering Sharif University of Technology Tehran Iran

In this paper, a new method for making v/uv decision is developed which uses a multi-feature v/uv classification algorithm based on the analysis of cepstral peak, zero crossing rate, and autocorrelation function (ACF) peak of short-time segments of the speech signal by using some clustering methods. This v/uv classifier achieved excellent results for identification of voiced and unvoiced segments of speech.

关键词： Speech Voiced Unvoiced Clustering Cepstrum Autocorrelation Zero crossing

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Relationship between Changes in Functional Capacity and Anthropometric, Clinical and Psychological Indicators in Cardiac Patients Participating in Cardiac Rehabilitation Program

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Health 2021年第11期13卷 1303-1313页

作者： hadavi Mohammad mahdi Sadeghi Masoumeh Kheiry Mohammad Ali Hamidreza Roohafza Rafati Fard Mohammad Cardiac Rehabilitation Research Center Cardiovascular Research Institute Isfahan University of Medical Sciences Isfahan Iran Iranian Hospital Dubai UAE Health Science/Exercise Physiology Clinical Research Development Unit Hajar Hospital Shahrekord University of Medical Sciences Shahrekord Iran

Background: Cardiac rehabilitation (CR) is a multifaceted treatment that can increase the survival and quality of life of cardiac patients by increasing their functional capacity (FC). In this study, we aimed to investigate the FC changes of cardiac patients after the CR program in different subgroups in terms of anthropometric, clinical, and psychological indices. Materials and Methods: This is a descriptive retrospective study that has been derived from the results of a Cohort study at the Rehabilitation Research Center of the Cardiovascular Research Institute of Isfahan (Iran), from 2006 to 2017. In this study, the dependent variable is functional capacity changes based on Mets obtained in exercise testing at the beginning and end of the CR program. Independent variables included age, sex, dyslipidemia, diabetes, smoking, and Body mass index, type of intervention, depression, and EF. Results: The sample size is 1250 cardiovascular patients, of which 917 (73.5%) are male and 331 (26.5%) are female. Functional capacity after the CR program significantly increased in all age, gender, body mass index, hypertension, hyperlipidemia, diabetes, smoking, depression, EF, and type of operation performed (angioplasty or open-heart surgery) subgroups, (p Conclusion: The results of this study show the importance of rehabilitation programs in the secondary prevention of cardiovascular disease in different subgroups and factors such as gender, level of primary depression, and EF less than 35 are the most important factors affecting functional capacity increase after CR program in heart patients.

关键词： Functional Capacity Heart Patients Cardiac Rehabilitation

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