In order to adapt to a rapid changes of manufacturing orders, flexible manufacturing systems (FMS) advances into the direction that machines become further versatile functionally and that tools are controlled by fast tool delivery device. Versatile machine can perform a variety of operations when it is supplied with the required tools. Tool management is among the essential elements in the succ...

This paper addresses the deadlock avoidance problems in manufacturing systems with sequence and route flexibility. It is shown that for a large class of such systems, through one-step look ahead, an optimal deadlock avoidance policy can be obtained. For a general system the authors present a system reduction method by which the system is reduced and the reduced system has an optimal deadlock av...

This paper presents the results through the implementation of IT-based systematization of control room operation. IT-based systematization, consisting of an Intelligent Sequence Control System (ISCS) for automatic operation and an Advanced Monitoring System (AMS) for automatic monitoring, on the other hand, permits ready achievement of the recommendation target. Moreover, ISCS/AMS are very effe...

Drought is an inevitable part of the world’s climate. It occurs in wet as well as in dry regions. Therefore, planning for drought and mitigating its impacts is essential. In this study, a hedging rule is developed using the zero/one mixed integer-programming approach. Furthermore, some procedures are introduced to ease the computational burden inherent in integer programming. Hedging rules are ...

One-dimensional and three-dimensional piecewise chaotic maps are used to propose an image-encipher technique in this article. First, the logistic map is construct pseudo-random sequence. After that, sequence scramble plain image. Next, has produced a mask of doing some preprocessing steps on mask, bit-wise XOR operation with applied shuffled The suggested algorithm encipher decipher different r...

Surface mount component placement machines are being widely used in electronic manufacturing industry for automated placement of components on printed wire boards (PWBs). Their performance is determined by their board assembly time. Factors that determine this include the machine’s architecture and placement sequence algorithm, and component locations on the board. For a given machine and a boa...

The proposed encryption algorithm is composed of two parts, permutation and diffusion. we firstly separate the RGB image into R, G, B components, and Generate three chaotic sequences by chaotic maps to encryption. Then, transform the R, G, B components and the chaotic sequences into DNA code, and get DNA sequences matrix. Secondly, DNA matrices of the RGB image is permutated under the Chen’s hy...

Let B be the operation of re-ordering a sequence by one pass of bubble sort. We completely answer the question of when the inverse image of a principal pattern class under B is a pattern class.