The present work studies the effect of redundancies on reliability coherent systems formed by modules. Different at components’ level versus modules’ are investigated, including active and standby redundancies. For that, a new model is presented. This takes into account dependence among components, as well as, modules system. In both cases, structure modeled copula functions. Several results pr...

Particle swarm optimization (PSO) and simplified (SSO) are two of the state-of-the-art intelligence technique that is widely utilized for purposes. This paper describes a particle-based (PSSO) procedure which combines update mechanisms (UMs) PSO SSO to determine optimal system reliability reliability-redundancy allocation problems (RRAPs) with cold-standby strategy while aimed at maximizing rel...

This paper presents genetic algorithms for solving various reliability design problems, which include series systems, series-parallel systems and complex (bridge) systems. The objective is to maximize the system reliability, while maintaining feasibility with respect to three nonlinear constraints, namely, cost and weight constraints, and constraints on the products of volume and weight. In thi...

Error correction codes of suitable redundancy are used for ensuring perfect data recovery in noisy channels. For iterative decoding based methods, the decoder needs to be initialized with proper confidence values, called the log likelihood ratios (LLRs), for all the embedding locations. If these confidence values or LLRs are accurately initialized, the decoder converges at a lower redundancy fa...

In this paper, the authors propose an algorithm-level time redundancy-based concurrent error detection (CED) scheme against permanent and transient faults by exploiting the hardware allocation diversity at the register transfer level. Although the normal computation and the recomputation are carried out on the same data path, the operation-to-operator allocation for the normal computation is di...

This paper presents a new multi-objective mathematical model for the redundancy allocation problem with the choices of a redundancy strategy and component type in series-parallel systems. The model considers entropy measure which is a measure of uncertainty in the information theory. For the first time, the model maximizes the reliability and entropy of the system and minimizes the nonlinear co...

The main goal in this paper is to propose an optimization model for determining the structure of a series-parallel system. Regarding the previous studies in series-parallel systems, the main contribution of this study is to expand the redundancy allocation parallel to systems that have repairable components. The considered optimization model has two objectives: maximizing the system mean time t...

Recent empirical evidence suggest that tradeoff shapes can evolve, challenging the classica image of their high entrenchment. Here we model the evolution of the physiological mechanism that controls the allocation of resources to two traits, by mutating the expression and the conformation of its constitutive hormones and receptors. We show that trade-off shapes do indeed evolve in this model th...

SADAN KULTUREL-KONAK1, ALICE E. SMITH2 and DAVID W. COIT3 1Management Information Systems, Penn State Berks-Lehigh Valley College, Tulpehocken Road, P.O. Box 7009, Reading, PA 19610-6009, USA E-mail: [email protected] 2Department of Industrial and Systems Engineering, Auburn University, 207 Dunstan Hall, Auburn, AL 36849, USA E-mail: [email protected] 3Department of Industrial and Systems Engi...