In this article we present the way how to create a program in the Scilab-Xcos environment with which it can be dimensioned, mathematically modeled and simulated a water pumping installation. The mathematical equations implemented in the program with which the dimensioning and simulation are done are presented. Fuzzy logic was used to generate the pump characteristics.

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In this article we present the way how to create a program in the Scilab-Xcos environment with which it can be dimensioned, mathematically modeled and simulated a ventilation installation using artificial intelligence for its implementation. The mathematical equations implemented in the program with which the dimensioning and simulation are done are presented. A neuro-fuzzy system was used to generate the fan characteristics.

In this paper presents the mathematical modelling of the flowing river eutrophication process based on model kinetic equations QUAL2E and developed using Scilab-Xcos program. This can be seen graphically by the evolution over time of: algal mass, organic nitrogen, ammonia, nitrite nitrogen, nitrate nitrogen, organic phosphorus, soluble phosphorus, dissolved oxygen concentration and Biochemical oxygen demand for the oxidation of organic substances containing carbon in water of a river, in the case of discharge of a certain wastewater flow untreated, having a certain organic loading.