The finite element method plays an extremely important role in forging process design as it provides a valid means to quantify forging errors and thereby govern die shape modification to improve the dimensional accuracy of the component. However, this dependency on process simulation could raise significant problems and present a major drawback if the finite element simulation results were inac...

Wave diffraction is a very important phenomenon in marine engineering and several models have been developed for its simulation. The new version of SWAN, a third generation spectral model, includes an approximation to wave diffraction. The approximation is based on the mild-slope equation for refraction and diffraction, omitting phase information. The objective this paper is to evaluate the per...

Process monitoring and fault diagnosis using profile data remains an important and challenging problem in statistical process control (SPC). Although the analysis of profile data has been extensively studied in the SPC literature, the challenges associated with monitoring and diagnosis of multichannel (multiple) nonlinear profiles are yet to be addressed. Motivated by an application in multi-op...

1 Modern hearing aid technology allows the response pattern of a multi-microphone directional array to be varied in response to the acoustic environment. For example, some systems attempt to identify noise sources and respond by steering an acoustic null or nulls formed by the directional microphones toward the noise source. While this technology holds the promise of improved speech intelligibi...

The paper analyses possibilities of episodic multi-winner multi-directional associative memory taught by evolutionary algorithm. This kind of memory allows to store and recall more complex associations, like episode-to-episode.

Recent evolutions on forging process induce more complex shape on forging die. These evolutions, combined with High Speed Machining (HSM) process of forging die lead to important increase in time for machining preparation. In this context, an original approach for generating machining process based on machining knowledge is proposed in this paper. The core of this approach is to decompose a CAD...

Within the manufacturing process planning, blanks are either selected or designed, respectively forms of input material for the manufacture of products. Reviewed in this paper are three types of group blanks: group castings, group forgings manufactured by closed die forging and free forging, and group blanks manufactured by pressing melted metal in casts. The paper also presents requisites for ...

The influence of the sinter-forging rate on the critical cur ren t density (J,) behaviour in an external field a n d on the contact resistance R, for Bi-2223 cur ren t leads has been investigated. The cur ren t leads were fabricated by a combination of Cold Isostatic Pressing (CIP) and sinter-forging methods with the thickness reduction rate ranging from 0% to 90%. The two silver contact termin...

Initial location of the billet and the shape of die have an important effect on parameters of precision forging. Some of these effects are the contact stresses, material flow, distribution of stress, and also strain. In the present study, the die shape influences and the billet position in precision forging of two different shape groups have numerically and experimentally been investigated. Res...