For a traveling wave rotary ultrasonic motor, matching the stator with proper flexible rotor can be challenging because of actual contact mechanism’s complexity. Due to lack effective evaluation and prediction means in design process, prototype test is usually needed truly measure how well it performs, leading high cost long cycle. In order solve this problem, an efficient performance method ba...

The development of a telecommunications infrastructure is underway in both the developing and developed nations. The challenges of the development of a national telecommunications infrastructure for developing economies differ significantly from the developed economies. This study provides an analysis of the telecommunications infrastructure development process in Thailand. It does this by exam...

This paper proposes a driving method, the superimposed pulse that can make an ultrasonic motor run at low speed. Although this method solves periodic oscillation of speed in traditional low-speed motor, it still has small fluctuation, which affects stability To reduce fluctuation rate speed, structure model and are established, based on theory beat traveling wave, motion characteristics particl...

Piezoelectric wafer active sensors (PWAS) are inexpensive, non-intrusive un-obtrusive devices that can be surface-mounted on existing structures, or inserted in a new composite structure. The PWAS can be used in both active and passive modes. In active mode, the PWAS generate Lamb waves that can exist as either traveling waves or standing waves. As traveling waves, PWAS-generated Lamb waves can...

We present in this paper our approach for modeling inter-topic preferences of Twitter users: for example, those who agree with the Trans-Pacific Partnership (TPP) also agree with free trade. This kind of knowledge is useful not only for stance detection across multiple topics but also for various real-world applications including public opinion surveys, electoral predictions, electoral campaign...

in this paper, exp-function and (g′/g)expansion methods are presented to derive traveling wave solutions for a class of nonlinear space-time fractional differential equations. as a results, some new exact traveling wave solutions are obtained.