Mechanisms for assessing and predicting the forest resource potential of the northern oil-producing territories of Western Siberia are of great importance in the tasks of environmental impact assessment. The assessment of the biodiversity sustainability of the northern forest areas using predictive population models of tree-edificators (trees as ecosystem engineers), in particular, Siberian larch (Larix sibirica Ledeb) is proposed. A projection matrix was first developed and adjusted to numerical values, and the possibility of its identification is shown based on dynamic curves of the tree stand and cones yield. The variant of ontogenetic stages (juvenile, auxophase, generative) is taken as a basis. A brief description of these stages is given including age limits, duration, and their possible indicators for Siberian larch. Since the duration of the stages is different, the modified Lefkovitch model and indicators of survival, delay and fertility are applied. The first two indicators are identified using the dynamic curve of the normal trees stand (N. V. Vyvodtsev), the third – using the curve of the yield of cones by age as applied to the territory conditions (E. P. Verkhovtsev). As a result, numerical values of parameters of the matrix are obtained, the maximum eigenvalue and an indicator of potential growth are determined, indicating the growth or decline of the population. In the considered variant, their values are close to one, which indicates the stability of the population. Furthermore, the structure of the tree stand in 20 years is determined. The results can be used as a basis for monitoring the sustainability of biodiversity of a designated forest area in the northern regions with increased man-made stress, which requires data on growth curves for the population and yield of edificators, including Siberian larch.

The article considers the problem of convective heat transfer on a streamlined flat plate in an optical flowmeter of gas and liquid. A method for measuring the flow velocity by changing the transverse temperature gradient is proposed. The dependence of the angular deviation of the laser beam on the flow velocity is studied taking into account the laws of heat transfer during free convection. The unstable temperature distribution for the air flow rate in the measuring cell is found. The possibility of developing a laser flow meter for measuring small gas flow rates are shown. The applicability limits of the proposed measurement method are determined.

The innovative ASP method can be used to enhance oil recovery. A technique is proposed to refine the ASP solution based on the rotating drop method. The method is used to determine the dependence of the surface tension coefficient at the oil-ASP interface on the solution component concentration and temperature. The compositions of solutions for heavy oil extraction were obtained.

The article describes the project contents on the working model creation of an automated control system for a greenhouse complex, which includes a controller, a cloud server, and a remote client. The system manages data collecting on the state of crops, lighting, power, and microclimate. Additional control over the process of growing plants is carried out using surveillance cameras installed in the greenhouse, the image from which is processed in real time and stored on the cloud server, and then transferred to the remote client.

The proposed approach for modelling and evaluating project activities is based on a comprehensive assessment of the project’s life cycle quality indicators. The logical dynamic model of the life cycle of the project design stage of the project creation is presented. As a mathematical formalism, the authors propose to use extended Petri nets – E-networks, which allow describing discrete parallel interacting processes when creating the system. The presented hierarchical E-network scheme allows modelling stages of work, as well as the resources used in the performance of these works. As a result of analytical and simulation work, both calculated integral evaluations of the project's effectiveness and effectiveness of each resource are presented. The result of the model as a timing diagram of the organization with the necessary level of detail is also given. The authors have proposed the following numerical indicators of resources costs for the project: an indicator of time and an indicator of the material costs spent on the i-th task.

The article proposes a method of subsurface radar sensing by polarization-modulated signals. The results of numerical simulation of the influence of concrete moisture on the directional characteristics of the Vivaldi antenna are presented. The sequence of operations for digital processing of radar images of piles installed in the ground is described. The results of experimental measurements of pile length and separation of metallic inclusions are given.

Classical methods for analyzing and evaluating the longevity indicators of mission-critical systems such as nuclear power units of nuclear power plants and icebreakers, main oil and gas pipe-lines, space stations, Earth protection systems from dangerous space objects, do not allow correctly predicting the values of longevity and safety indicators. Therefore, further studies of new theoretical methods in this area are needed. Consequently, the problem of “Time” in general and “Internal time” in particular remains extremely relevant. This article analyzes the essence of the transformation operator in the theory of asymmetry of internal time. Existing methods for assessing the asymmetry of time primarily required the development and application of operators of microscopic entropy and internal time, which have been studied deeply enough so far. The transformation operator received less attention, although its importance is very great. Hence, the purpose of this article is to generalize the achievements in evaluating the essence of the transformation operator for a problems variety of asymmetry of internal time in the past-present-future modes. To achieve this goal, the article uses the deterministic and probabilistic-statistical approaches of the theory of functional analysis operators that are already widely described in Russion and foreign literature [1–13]. The scope of existing approaches to assessing the role of the transformation operator in the theory of functional analysis operators has been expanded taking into account various asymmetries of time in the past-present-future modes.