Optimal Construction Method Research Articles

Optimal Construction Method of Artificial Reef Considering Diffusion and Accumulation Property of Dumped Materials

In the construction of artificial reef in deep water, constitutive materials are usually dumped from a barge into the sea directly. In case that rubbles are used, dumped rubbles are not accumulated effectively on the seabed in a conventional method because significant diffusion occurs in the longitudinal direction of a barge during their fall. In this study, tank-coverage sheet is proposed to reduce the diffusion of the rubbles. The effectiveness of the diffusion-reducing sheets was confirmed, and diffusion and accumulation property of dumped rubbles was clarified by laboratory experiment and actual construction. The optimal construction method of artificial reef is proposed by use of the methods for predicting the movement of dumped materials due to flow and accumulation shape and for reducing the diffusion during their fall.

A method of constructing a dictionary for facial image recognition independent of facial direction

The aspect method that uses mosaic features is a method that can perform high-speed, accurate recognition of humans without requiring special subject motion and which is independent of facial orientation. However, there remains the problem of how to construct the optimal dictionary for use in a knowledge system based on the aspect method. In this paper, for the purpose of applying it to applicant recognition systems based on facial recognition, an optimal dictionary construction method is described for recognizing humans independent of facial orientation. First, a dictionary optimization design plan is presented which uses the statistical characteristics of the distances caused by differences in facial orientation, and those caused by differences among the individuals to be recognized. Next, we describe the results obtained from an optimal dictionary that uses faces without changes in expression to give good matching conditions. The span of facial orientations that can be entered into the dictionary is 30 degrees, and it is shown that an appropriate dimensionality for the mosaic features is 12 × 12. Finally, human recognition experiments are performed with actual images taken at the entrance of a room. The robustness of the approach is investigated in a realistic environment in which the dictionary structural states were derived. © 1998 Scripta Technica, Inc. Syst Comp Jpn, 28(14): 49–62, 1997

A method of constructing a dictionary for facial image recognition independent of facial direction

The aspect method that uses mosaic features is a method that can perform high-speed, accurate recognition of humans without requiring special subject motion and which is independent of facial orientation. However, there remains the problem of how to construct the optimal dictionary for use in a knowledge system based on the aspect method. In this paper, for the purpose of applying it to applicant recognition systems based on facial recognition, an optimal dictionary construction method is described for recognizing humans independent of facial orientation. First, a dictionary optimization design plan is presented which uses the statistical characteristics of the distances caused by differences in facial orientation, and those caused by differences among the individuals to be recognized. Next, we describe the results obtained from an optimal dictionary that uses faces without changes in expression to give good matching conditions. The span of facial orientations that can be entered into the dictionary is 30 degrees, and it is shown that an appropriate dimensionality for the mosaic features is 12 × 12. Finally, human recognition experiments are performed with actual images taken at the entrance of a room. The robustness of the approach is investigated in a realistic environment in which the dictionary structural states were derived. © 1998 Scripta Technica, Inc. Syst Comp Jpn, 28(14): 49–62, 1997