in statistical quality control a very widely used measure is average run length (arl) which may be worked out by different methods like integral equation, approximations, and monte carlo simulations. the arl measure and the other related measures are of major significance in every type of production process. an omission in its computation (and hence its related measures such as extra quadratic ...

In many processes in real practice at the start-up stages the process parameters are not known a priori and there are no initial samples or data for executing Phase I monitoring and estimating the process parameters. In addition, the practitioners are interested in using one control chart instead of two or more for monitoring location and variability of processes. In this paper, we consider a s...

Abstract Traditional three-level neutral-point clamped converter has the problem of uneven loss distribution, which restricts increase capacity. Three-level active (3L-ANPC) can reduce imbalance power device distribution. At present, three traditional SPWM modulation strategies are used in single-phase ANPC modulation. Considering it is generally required to input current and voltage sampling v...

In this paper, the authors propose a new three-phase, nine-level inverter with self-balancing of capacitors voltages. The proposed is result serial connection SPUC topology and NPC converter. A single DC source used, each phase made up nine power switches three capacitors. Two control techniques are to maintain voltages at desired values, first which PWM technique ensures in open loop without u...