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The effect of the gate number and location, packing pressure and time on the filling cavity pressure, distribution of welding lines, warpage distortion quantity and shrinkage of the plastics part were analyzed by means of moldflow software for plastic electric button seat. Some possible defects in the products were predicted based on the numerical simulation. The optimal runner gate, the optimal technology...
Image segmentation can be considered as the process of clustering image pixels of different image features. Clustering algorithm based on ant behaviors is a parallel, self-organized algorithm with sound discreteness, positive feedback and robustness. The basic ant colony algorithm is redundant in futile program loop, random in search mechanism and of which, the result is sensitive to the initial parameters...
In Statistical Process Control (SPC), when dealing with a quality characteristic x that is a variable, it is usually necessary to monitor both the mean value and variability. By inspecting the absolute value of sample mean shift, a single CUSUM chart (called the ABS CUSUM chart) has been devised by an optimization algorithm and fully investigated for this purpose. The optimization algorithm (called...
By combining the subjective and objective weights with the optimization technique, we construct an optimal model to make the deviation among the aggregated evaluation values as large as possible. Then the final weights of indices, which reflect the subjective and objective information, can be obtained. This approach is propitious to order schemes and select the best one.
This article studies a new feature of the ACUSUM chart related to the exponential w of the sample mean shift in (xt - ??0)w. The testing cases reveal that the chart outperforms the earlier ACUSUM chart, works as well as the combined schemes consisting CUSUM and/or X?? charts, but is easier to design and implement. In addition, a general-purpose optimization algorithm is proposed. It can significantly...
Hybrid sensor networks consisting of both static and mobile sensor nodes attract more research interests with their enhanced capability. As mobile nodes generally have more power than static nodes, they are preferable to be used as cluster heads. In this paper, we study the mobile node deployment problem with the objective of maximizing the number of static nodes covered by the mobile nodes with minimized...
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