International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Water is the basic source of life for plants, animals, and humans. However, the impact of climate change drastically reduces its sources. Rational consumption of clean water leads to the need for finding alternative water sources for irrigation of gardens. As an alternative source, greywater can play an important role. Greywater is waste water from households, which does not contain faecal compounds. The aim of this paper to present design concepts of systems for collecting, purifying and application of greywater and well water for irrigation of gardens. The concept is developed using previous own research results, as well as available literature, on the benefits and risks of using greywater, and the effects of purifying greywater and well water through various treatment systems. The paper presents two systems: (1) a system which allows the storage and irrigation using raw greywater and (2) a system where greywater supply is not continuous. The second system is suitable not only for households but also for other facilities, e.g. touristic, recreational and weekend resorts. This system proposes alternate irrigation with grey and well water for resolving two problems: inappropriate greywater quality and inappropriate water quantity. In general, the system reduces the risk of soil degradation and is water saving by automatically adjusting irrigation with regard to the soil moisture content.

The types of entrepreneurial activity and form of enterprises are investigational. Described business system and her elements. Sequence of executions and in accordance with principles which provide the acceptance of effective administrative decisions aimed at realization of investment strategy of industrial enterprises is offered. Tasks which must be the strategies of industrial enterprise taken into account in the process of choice are certain. The stages of life cycle of industrial enterprises are set from the period of “birth” to the period of “expansion”. Expediency of different forms of strategy of diversification of investment activity of industrial enterprises is reasonable.

It has been proposed to the main stages of controlling based on its business investment principles. The main features of certain types of business investment controlling have been given. An example of a priorities system of an enterprise net investment returns` controlled indicator has been formed. It has been proposed the key stages of the monitoring system` building regarding investment activity controlled indices`. Business investment activity monitoring system has been worked out.

In the present paper the general characteristic movement of automatics of a shot is discussed, and an analysis is given concerning the laws of the movement of the weapon mechanisms.

This paper attempts to provide a transparent and, if possible, a formal hierarchy of the main types of mathematical models used in the description of dynamic processes inside, at first glance, different systems. It is emphasized that the mathematical modeling is a natural and universal environment for effective analysis of system processes of different nature. From our point of view, the term "system analysis" means the methodology for classification of real systems (physical, biological, economic, social, etc.), which is based on the classification of mathematical models that are used to describe these systems.

This paper attempts to provide a transparent and, if possible, a formal hierarchy of the main types of mathematical models used in the description of dynamic processes inside, at first glance, different systems. It is emphasized that the mathematical modeling is a natural and universal environment for effective analysis of system processes of different nature. From our point of view, the term "system analysis" means the methodology for classification of real systems (physical, biological, economic, social, etc.), which is based on the classification of mathematical models that are used to describe these systems.