Pub. online:1 Jan 1998Type:Research ArticleOpen Access
Volume 9, Issue 2 (1998), pp. 235–252
In the present paper, the method of structure analysis for multivariate functions was applied to examine the global sensitivity of three complex models: the HIV/AIDS infection spread, radar search, and the multiple criteria decisions.
The investigation of global sensitivity exposed the most influential parameters or their groups. This knowledge makes it possible to concentrate efforts to obtain more exact values of these main parameters.
As a rule, only a small part of model parameters has a significant influence.
Pub. online:1 Jan 1992Type:Research ArticleOpen Access
Volume 3, Issue 2 (1992), pp. 256–274
The results of investigation of the resource management in radar search are presented in the paper. The time for search of manoeuvring targets is minimized by optimal distribution of radar power among the space directions and by optimization of search parameters.
The problem of the optimal control of radar search is extremely complicated in the general case and in real situations, therefore we have compared only some strategies (e.g., one stage cyclic strategy, various multistage strategies).
In some simple cases (e.g., motionless targets) optimal parameters of multistage strategies maybe found but in the general case the efficiency of strategies may be evaluated with the help of statistical simulation. The simulation time was essentially reduced by some simplifications of models, by the forecast of discrete coordinates of the targets and by the use of averaged values.
The usage of the proposed strategies enables us to reduce the time of search by 2–3 times. Those strategies may be executed in real time.