The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a new time-frequency (TF) underdetermined blind source separation approach based on Wigner-Ville distribution (WVD) and Khatri-Rao product to separate non-stationary sources from mixtures. First, an improved method is proposed for estimating the mixing matrix, where the negative value of the auto WVD of the sources is fully considered. Then after extracting all the auto-term...
In this paper we study primal-dual interior point methods (IPMs) based on a new class of kernel functions which were designed by M. El Ghami, J.B.M Melissen and C. Roos for linear optimization, we extend the functions to second-order cone complementarity (SOCCP). The complexity bound of the method is shown, and the complexity bound of small-update interior-point methods matches the best known complexity...
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...
This article studies the sample sizes of two most commonly used control charts, the X?? chart and the CUSUM chart. It takes the sampling cost (including the variable and fixed components) into consideration and uses a quadratic loss function as a performance measure. It is interesting to find that if nX?? = 4 and nCUSUM = 1, the X?? chart often outperforms the CUSUM chart. Furthermore, the overall...
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 proposed an algorithm for the optimization design of the combined Shewhart chart and CUSUM chart ( Xmacr& CUSUM chart) that has been widely used in Statistical Process Control (SPC). The optimization design effectively improves the overall performance over the entire process shift range. A new feature pertaining to the exponential of the sample mean shift w is investigated to further...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.