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Collaborative planning, forecasting and replenishment (CPFR) is a cooperative management approach that helps to improve the abilities of supply chain members to increase their revenue and profit. Despite promising results reported by companies that have adopted CPFR, the implementation of CPFR appears to have encountered some obstacles. It is proposed here that a lack of appropriate detailed information...
Visual cryptography is a form of secret sharing requiring only human vision to decrypt a secret image, based on the stacking of seemingly random shadow images, or "shares". The main optimization metrics are pixel expansion and recovered image contrast. Maximization of the latter is crucial, as it determines the quality of the decrypted secret. This paper proposes genetic algorithms to evolve...
This study develops an evolutionary strategy called DEPSO-GANN, which uses an artificial neural network (ANN) based on a parallel genetic algorithm (PGA) with migration for the adaptive control of integrated differential evolution (DE) and particle swarm optimization (PSO) to solve large-scale optimization problems, reduce calculation costs, and improve the stability of convergence towards the optimal...
This paper presents results of the utilization of four different discrete chaotic maps as pseudo-random number generators for the particle swam optimization algorithm in the task of PID controller design for two different systems. The results are compared with previously published results and discussed.
Numerical simulations of multilayer electrochemical biosensor with degradation of substrate and/or product have been presented. Action of the enzyme has been assumed to be a Michaelis--Menten process. Two cases: when product diffuses out of the biosensor and when the outer membrane is impermeable for product have been dealt with by adjusting boundary conditions in the mathematical model. A few versions...
CYP1A2 enzyme is involved in several metabolic processes that may produce substances with carcinogenic or mutagenic activity. Most commonly it metabolizes the charcoaled food components, polycyclic aromatic hydrocarbons (PAHs) or heterocyclic aromatic amines (HAAs) into mutagenic and cytotoxic substances. Dehydroepiandrosterone (DHEA) is formed endogenously from cholesterol and is a precursor of sex...
This paper presents a realistic PET scanner simulation using Monte Carlo code, version MCNP5. The objective of our study was to verify the code used for this simulation by comparing the results obtained from the simulation with those obtained from the measurement did on a real PET scanner. This study will provide a basic benchmark for our further study on PET imaging. We modeled the scanner based...
A process of long-term ecological successions has been considered. The model of open Eigen's hyper cycle has been proposed for modelling of the process. The model is a system of differential equation of the second order. The multi-dimension case is analysed, it is shown that i many cases consideration of dynamics of n-dimensional system can be simplified by partial reduction to (n-1)-dimensional cases...
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