We developed a CALL (computer-aided language learning) system for teaching the pronunciation of Japanese long vowels, the mora nasal and mora obstruents to nonnative speakers of Japanese. Long vowels and short vowels are spectrally almost identical but their phone durations differ significantly. Similar conditions exist between mora nasals and non-mora nasals, and between mora and non-mora obst...

The sum of two randomly-phased sine waves and Gaussian noise arises in various fields of communications. In this paper, a Laguerre series and also a power series are introduced, for the envelope PDF of this random process. Moreover, tight upper bounds are derived for the truncation error of these two infinite series. Comparison of these two upper bounds show that the Laguerre series is superior...

In this paper, by a concise and elementary approach, we sharpen and generalize Shafer’s inequality for the arc sine function, and some known results are extended and generalized.

A sinusoidal model for the speech waveform is used to develop a new analysislsynthesis technique that is characterized by the amplitudes, frequencies, and phases of the component sine waves. These parameters are estimated from the short-time Fourier transform using a simple peak-picking algorithm. Rapid changes in the highly resolved spectral components are tracked using the concept of “birth” ...

This study introduces an effective hybrid optimization algorithm, namely Particle Swarm Sine Cosine Algorithm (PSSCA) for numerical function and automating optimum design of retaining structures under seismic loads. The new algorithm employs the dynamic behavior sine cosine functions in velocity updating operation particle swarm (PSO) to achieve faster convergence better accuracy final solution...

In the paper, by virtue of a derivative formula for ratio two differentiable functions and with help monotonicity rule, authors expand logarithmic expression involving sine function into Maclaurin power series in terms specific determinants prove decreasing property expressions containing function. These results are interesting purely pure mathematics.

Jonathan Desponds, Andreas Mayer, Thierry Mora, and Aleksandra M. Walczak University of California San Diego, Department of Physics, La Jolla, CA 92093, USA Laboratoire de physique théorique, CNRS, UPMC and École normale supérieure, 24, rue Lhomond, 75005 Paris, France Laboratoire de physique statistique, CNRS, UPMC and École normale supérieure, 24, rue Lhomond, 75005 Paris, France (Dated: Marc...

Formation micro imager (FMI) can directly reflect changes of wall stratums and rock structures. Conventionally, FMI images mainly are analyzed with manual processing, which is extremely inefficient and incurs a heavy workload for experts. Iranian reservoirs are mainly carbonate reservoirs, in which the fractures have an important effect on permeability and petroleum production. In this paper, a...

There are several compression methods for phase to amplitude converter for sine function. In this paper, the linear and parabolic approximation of equi-section division utilizing the symmetry property and amplitude approximation of a sinusoidal waveform for direct digital frequency synthesizer (DDS) and also for other waveform applications, e.g. function generators and telecommunication devices...