During last decades geographical science are subjected to crisis events under impact of new social-economic factor in Ukraine. The aim the article is analysis modern geography as a fundamental during conditions New scientific structure was elaborated. As result, additional spheres were distinguished, for instance: limnology, coastal science, engineering geography, methods research, etc. Geograp...

Forest fire-potential is natural disaster that breaks out strongly , destructs largely and is difficult to dispose and rescue, its destructive power has a serious threat to the security of society and human living environment, moreover, it does greatly damage to natural ecological environment. Therefore, the study on forest fire prediction and prevention is a main job. In fact, it is complicate...

this paper presents a novel control approach used in shunt active power filter based on variable structure control combined with random pwm technique (rvsc) that provides robust, fast, and more favorable performance for active power filter. this control strategy is compared with two other strategies to show the effectiveness of the introduced methods; pulse width modulated proportional-integral...

grade control structures are hydraulic structures used to stabilize a river bed. scour downstream of this structure is the main cause of its failure. studies have developed numerous empirical relations for scour depth prediction that designers must choose between to decide the most effective equation for a specific application. this study tested the condition of submerged jets over beds of sedi...

We present a new type of feedback linearization that is tailored for mechanical control systems. call it linearization. Its basic feature the preservation structure system. For systems with scalar control, we formulate necessary and sufficient conditions are verifiable using differentiations algebraic operations only. illustrate our results several examples.

In this paper we present a unifying geometric framework for modeling various sorts of physical network dynamics as port-Hamiltonian systems. Basic idea is to associate with the incidence matrix of the graph a Dirac structure relating the flow and effort variables associated to the edges, internal vertices, and boundary vertices of the graph. This Dirac structure captures the basic conservation/...