This paper presents a new statistical-based method of tool life monitoring for turning process, called Integrated Kurtosis-based Algorithm for Z-filter Technique, I-kaz, which was based on statistical analysis. The I-kaz method calculates the related coefficient for the measured machining signals. The input data of the I-kaz was acoustic signal that was generated during machining process, which...

In this paper, we propose a novel wavelet coefficient threshold (WCT) depended on both time and frequency information for providing robustness to non-stationary and correlated noisy environments. A perceptual wavelet filter-bank (PWFB) is firstly used to decompose the noisy speech signal into critical bands according to critical bands of psycho-acoustic model of human auditory system. The estim...

A human can lift up an object with almost minimal grasping force regardless of the fiction coefficient between the fingers and the object, but the sensing mechanism for this remarkable task has not been well explicated yet. In this paper we propose a tactile sensor to detect a fiction coefficient at the moment of touch. With this sensor output we evaluate the largest lifting-force just before a...

abstract   a cystic acoustic neurinoma almost entirely consists of a cystic component and is a well recognized subtype of acoustic schwannoma. we report a case of a 40-year- old male patient who presented with clinical features of a left cerebello-pontine angle mass lesion and ct scan findings mimicking the diagnosis of an epidermoid cyst. however intraoperative and histopathological findings w...

The ultrasonic velocity, density and refractive indices have been measured for systems at 303.15, 308.15, 313.15, 318.15 and 323.15 K. From the experimental data adiabatic compressibility (βs), intermolecular free length (L f ), internal pressure (π), acoustic impedance (Z), molar refraction (Rm), Polarisability, (αp), thermal expansion coefficient (α), Rao’s molar sound function (R), solvation...

The generalized one-dimensional Schriidinger equation d2#/dx2 + k2H( x) ‘4 =P(x)# is considered. The nonuniqueness is studied in the recovery of the function P(x) when the scattering matrix, H(x), and the bound state energies and norming constants are known. It is shown that when the reflection coefficient is unity at zero energy, there is a one-parameter family of functions P(x) corresponding ...