On the determination of optimal time horizon in a control problem in natural resource economics.
On the von Neumann problem and the approximate controllability of Stackelberg-Nash strategies for some environmental problems.
Two problems arising in Environment are considered. The first one concerns a conjecture posed by von Neumann in 1955 on the possible modification of the albedo in order to control the Earth surface temperature. The second one is related to the approximate controllability of Stackelberg-Nash strategies for some optimization problems as, for instance, the pollution control in a lake. The results of the second part were obtained in collaboration with Jacques-Lois Lions.
Optimal environmental policy and the dynamic property in LDCs.
Optimal singular stochastic problem on harvesting system.
Population growth and the environment: Can we eat the cake and have it?
Principal-agent approach to environmental improvements policies
Successful solution to any environmental problem implies working with Knightian uncertainty that explicitly deals with decision making under conditions of unstructured randomness. A 'wild' type of randomness that we will never discern due to its unstable properties makes the assignment of corresponding probabilities impossible. For that reason, the consideration of general economical factors within cost/benefit analysis must fail. So, instead of governmental intervention and a cup and trade scheme,...
Problems of economic system optimization with quadratic criteria and monotone controls. Some algorithms for its numerical solution
Solving Ratio-Dependent Predator-Prey System with Constant Effort Harvesting using Variational Iteration Method
Due to wide range of interest in use of bio-economic models to gain insight into the scientific management of renewable resources like fisheries and forestry,variational iteration method (VIM) is employed to approximate the solution of the ratio-dependent predator-prey system with constant effort prey harvesting.The results are compared with the results obtained by Adomian decomposition method and reveal that VIM is very effective and convenient for solving nonlinear differential equations.
Stochastic Modeling of the Number of Trees and the Number of Felled Trees in Selection Stands
Sur les modèles probabilistes de prévision des localisations et des déplacements dans une agglomération
Tender selection procedure in the power generating industry.
The Determination of Timing and Technology Level of an Abatement Investment
The discrete Beverton-Holt model with periodic harvesting in a periodically fluctuating environment.
The nonlinear complementarity model of industrial symbiosis network equilibrium problem
In this paper, we propose an industrial symbiosis network equilibrium model by using nonlinear complementarity theory. The industrial symbiosis network consists of industrial producers, industrial consumers, industrial decomposers and demand markets, which imitates natural ecosystem by means of exchanging by-products and recycling useful materials exacted from wastes. The industrial producers and industrial consumers are assumed to be concerned with maximization of economic profits as well as minimization...
The role of delay in digestion of plankton by fish population: A fishery model.
The transylvanian problem of renewable resources
Usefulness of Biocontrol of Pests in Tea: A Mathematical Model
Nowadays there has been a growing consciousness among the tea industry to reduce the use of the chemical pesticides for pest control. Predators are beneficial insects that feed on harmful insects and mites, which incur considerable loss of production of tea. In this paper we have considered a tritrophic model consisting of tea plant, pest and predator to analyze different field observations. The effect of discrete time-delay on the tritrophic model is studied critically. The dynamical behaviours...
Visitor and firm taxes versus environmental options in a dynamical context.