Polymeric multifilaments have gained a significant interest in recent decades. In the studies of mechanical characteristics, although there are different types tests, such as rupture, abrasion, creep, impact and fatigue, it can be said that main characterisation is tensile rupture strength (Yarn Break Load, YBL), which also serves parameter for other tests. The objective this work to evaluate r...

Fluorescence excitation spectra, at resolution 0.02 cm, in the system à A92X̃ A8 were recorded for acetaldehyde in a supersonic jet. We performed full rotational analysis of bands 140 150 n and 140 150 n , for n50 – 4, in which 14 and 14 denote the two inversion tunneling components of the aldehyde hydrogen out of plane bending, in the vibrational ground state of à A9. Torsional levels from near...

The oil and gas industry has a growing demand for electrically driven trains operated at variable speeds. Variable frequency electrical drives enable increased operational flexibility and energy efficiency. This is of great importance in applications requiring high power, such as gas compression. Load commutated inverters (LCIs) are one of the most widespread technologies for driving large gas ...

In this paper surface energy and elastic medium effects on torsional vibrational behavior of nanorods are studied. The surface elasticity theory is used to consider the surface energy effects and the elastic medium is modeled as torsional springs attached to the nanorod. At the next step, Hamilton’s principle is utilized to derive governing equations and boundary conditions. Then, with the aid ...

In this study, the torsional stability analysis is presented for thin cylindrical with the functionally graded (FG) middle layer resting on the Winker elastic foundation. The mechanical properties of functionally graded material (FGM) are assumed to be graded in the thickness direction according to a simple power law and exponential distributions in terms of volume fractions of the constituents...

The influence of laser processing parameters on mechanical properties and microstructure of pure titanium models made by selective laser melting is investigated. The density of the models can reach higher than 95% under proper conditions. Although the tensile strength test shows results comparable to the wrought material, the impact and torsional fatigue strengths are low because of porosity an...

A new general algorithm for optimization of potential functions for protein folding is introduced. It is based upon gradient optimization of the thermodynamic stability of native folds of a training set of proteins with known structure. The iterative update rule contains two thermodynamic averages which are estimated by (generalized ensemble) Monte Carlo. We test the learning algorithm on a Len...

The angle of torsional eye movement has small amplitude, a high degree of resolution and precision will be required. In the current mainstream method of obtaining the angle of torsional eye movement using an iris pattern, it has been difficult to ensure measurement with a tolerance of 1.0(degree) or less at all times due to changes in the deformation of the iris pattern. We wish to propose a me...