The paper examines, via simulation analysis the stabilizing effects of buffer stocks under different forms of supply functions, where each specification of the supply function represents a different expectational form about future prices. The analysis is carried out under different assumptions...

This paper introduces methods which are directed towards large linear and nonlinear systems. The methods are based on digraph properties and decomposition into subsystems (large linear systems), asymptotics and a sensitivity condition (nonlinear systems). Examples are drawn from the literature...

This paper presents some of main types of interferences that overhead EHV and UHV lines produce on the environment. Particularly, it considers the radio interference, the audible noise, the electromagnetic fields at ground and the interferences with nearby plants, showing the connection between...

The ability of a model of aquatic plant growth to make one-year projections is evaluated. In two out of four sampling stations, the results are quite good. At the other two stations the model predictions do not agree well with observations, but the 1981 observations from these stations are...

State and parameter estimation algorithms can validity be applied only to a system which is observable, controllable and identifiable. The roles of observability, controllability and especially identifiability are considered in achieving a system having unique structure and unique set of...

Approaches helping to overcome the difficulties in marine system simulation problems are discussed which rest upon the aggregation of components, presentation of the model in the form of a stochastic graph and design of logical information models. The simulation techniques are exemplified with...

Elliptic partial differential equations can be solved using the Galerkin-finite element method to generate the approximating algebraic equations, and an electrical network to solve the resulting matrices. Some element configurations require the use of networks containing negative resistances...

The problem of designing optimal blood sampling protocols for kinetic experiments in pharmacology, physiology and medicine is briefly described, followed by a presentation of several interesting results based on sequentially optimized studies we have performed in more than 75 laboratory animals....