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Friction stitch welding is a kind of new connection technology. It is fall short of 20 years after TWI brought forward the concept. The weld seam of friction stitch welding is composed with a series of FHPP. Shielding gas flux, feed speed, rotation speed, welding pressure, shape of bar and hole, heating temperature are the primary parameters which can influent the welding quality. The molding mechanism...
The electric conductivity and the hydrogen evolution overpotential of the five kinds of cathode material were tested by Chronoamperometry and the Polarization curves method ,respectively. The electric conductivity of the cathode was as follows: The electrode of Ni/Fe > stainless steel>Ni>Pt/Ti>active hydrogen; The sequence of the cathode hydrogen evolution overpotential was as follows:...
The factors that can influence the equipment optimization in filling construction of rock-fill dam are explained by analyzing the filling system of rock-fill dams in this paper, and an optimization model for equipment organization of fill construction of rock-fill dam is established, in which the minimum of unbalanced degree of filling intensity is taken as the objective function with constraint....
Comminuted fracture is still a medical problem because of the difficulties for the small bone pieces fixation. Bone adhesive is one of the most potential methods to solve the problem. However, there are a lot of defects in the present medical adhesives. Some adhesives will produce certain poisonous substance in body which would be harmful to people's health. Some have worse adhesive strength and degrade...
To study effective speech features which can represent different emotion styles in infant voice, nonlinear features based on Teager Energy Operator are investigated. Neutral state and 4 emotional states (i.e. happiness, impatience, anger and fear) are classified from the infant voice database. MFCC extraction and HMM-based emotion classification are used as baseline system to evaluate the emotional...
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