Sharif Digital Repository

Automatic detection of prosodic events in speech such as detecting the boundaries of Accentual Phrases (APs) and Intonational Phrases (IPs) has been an attractive subject in recent years for speech technologists and linguists. Prosodic events are important for spoken language applications such as speech recognition and translation. Also in order to generate natural speech in text to speech synthesizers, the corpus should be tagged with prosodic events. In this paper, we introduce and implement a prosody recognition system that could automatically label prosodic events and their boundaries at the syllable level in Persian language using a Multi-Space Probability Distribution Hidden Markov... 

Internet traffic classification is important in many aspects of network management such as data exploitation detection, malicious user identification, and restricting application traffic. Previously, features such as port and protocol numbers have been used to classify traffic, but these features can now be changed easily, making their use in traffic classification inadequate. Consequently, traffic classification based on machine learning (ML) is now employed. The number of features used in an ML algorithm has a significant impact on performance, in particular accuracy. In this paper, a minimum best feature set is chosen using a supervised method to obtain uncorrelated features. Outlier... 

It has been previously revealed that the stability and the monotonicity of step response in an integer-order LTI system are two specifications, which are preserved in its fractional counterparts possessing commensurate orders between zero and one. In this paper, it is shown that the monotonicity of magnitude-frequency is another specification which is inherited from integer-order systems to their commensurate order counterparts. This finding completes the trilogy of stability, extrema-freeness of the step response, and monotonicity of magnitude-frequency, as the specifications whose holding in integer-order systems yields in meeting them in their fractional-order counterparts with... 

This paper presents a novel method to estimate the design parameters of a diaphragm thermoacoustic Stirling engine and investigate the stable limit cycle (sufficient condition) of the engine dynamic using the genetic algorithm and system energy changes. In this regard, first, the parametric equations are extracted by employing both the governing equations of the engine and energy standpoint. Next, Vc 0 (initial volume of compression space), Rq (pneumatic resistance), Vh (initial volume of expansion space), and hot gas temperature (Th) are taken as the design parameters in this study. Genetic algorithm and parametric equations were then utilized to estimate the chosen design parameters. Next,...