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In order to improve the output performance, multi-stator structure is applied to traveling wave type ultrasonic motor (TWUM). In this paper, taking into account the multi-stator traveling wave type ultrasonic motor (MSUM) with diameter of 60mm, authors apply the elastic contact principle to deduce the MSUM's simulation model. By reason of machining errors and installation errors, the stators and rotors...
To transform kinetic energy of flowing water into electricity, an energy harvesting system based on vortex-induced vibration is investigated. In accordance with the theory of flow around bluff bodies, the Karman vortex street is first created to improve the vibrational energy of water. After that, the forces from shedding vortices make the polyvinylidene fluoride (PVDF) beam vibrate periodically....
During the past few years, there has been a massive explosion of multimedia content such as un-annotated images on the web. Automatic image annotation is an important task for multimedia retrieval. By automatically allocating semantic concepts to un-annotated images, image retrieval can be performed over annotation concepts. In this work, we address the problem of automatic image annotation, namely...
The coupling relationship existing between total pressure and liquid level of an air-cushioned headbox in the paper making industry is both complex and nonlinear. This paper analyzes and summarizes the advantages of a traditional BP neural network and PID control methods. A new controller based on BP neural network PID is designed to reduce the influence between the two variables. The controller modifies...
The advent of pervasive computing puts forward a new challenge for individual information research. With the explosion of information on the Internet, finding information relevant to a user's interest can be a time-consuming and tedious task. User interest learning plays an important role in information personalization. In this paper, a learning approach to acquire and update user interest is proposed...
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