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您的检索式：作者名="Stanislaw Raczynski"
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| 1 | Simulation and optimization in marketing:Optimal control of consumer goodwill,price and investment显示文摘Dynamic market optimization with respect to price,advertisement and investment is presented.The market model is nonlinear.Its main parameters are the elasticities with respect to price,advertisement and consumer income.Dynamic elements has been added to the static model based on the market elasticities.The parameters like seasonal index and consumer income are functions of time,and the whole market can grow due to the investment.The tools of the optimal control theory are applied to calculate optimal policy for product price,advertisement and investment,controlled simultaneously.The total revenue at the end of a fixed time interval is maximized. | Stanislaw Raczynski | 2014 | International Journal of Modeling, Simulation, and Scientific Computing2014，5，3： | 0 |
| 2 | Uncertainty in public health models treated by differential inclusions显示文摘An application of differential inclusions in the epidemic spread models is presented.Some mostly used epidemic models are discussed here,and a brief survey of epidemic modeling is given.Most of the models are some modifications of the Susceptible–Infected–Recovered model.Simple simulations are carried out.Then,we consider the influence of some uncertain parameters.It is pointed out that the presence of some fluctuating model parameters can be treated by differential inclusions.The solution to such differential inclusion is given in the form of reachable sets for model variables.Here,we focus on the differential inclusion application rather than the model construction. | Stanislaw Raczynski | 2020 | International Journal of Modeling, Simulation, and Scientific Computing2020，11，4： | 0 |
| 3 | Simultaneous events, singularity in the space of models and chicken game显示文摘The discrete event simulation with simultaneous events is discussed.Discrete models are treated as some points in the general space of models.The main topic of this paper is the convergence of sequences of continuous models to the corresponding discrete event model.It is pointed out that the discrete event models may represent some singularities in the space of models.This fact is related to the problem of validity of discrete event simulation.The models presented here are not the topic of the paper.These are known models,used as examples.The model of the“chicken game”and multiple elastic collisions are considered.It is shown that if a discrete event model is some special limit case of a sequence of continuous models with finite event duration,then that limit model is a singularity.It may provide results very different from the expected limit value of the results from the converging sequence of models. | Stanislaw Raczynski | 2021 | International Journal of Modeling, Simulation, and Scientific Computing2021，12，4： | 0 |
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