The paper discusses a method for constructing a nonlinear software reliability efficiency function. The proposed algorithm is based on the use of information about the values ​​of reliability criteria, as well as some expert judgments. This approach differs significantly from previously proposed models for assessing software reliability, which are based on a probabilistic approach. In the proposed method, in addition to objective information, subjective expert assessments are taken into account, which allows for a more flexible assessment of the reliability of software products.

Keywords: software reliability, probabilistic models, statistical models, partial performance criteria, linear programming, vector optimization, decision theory

With the development of digitalization of all spheres of society, the relevance of developing new software, and therefore methods of protecting it from illegal copying and reproduction, increases significantly. The main risks are related to both hacking of the finished release and leakage of individual code segments at the development stage. At the same time, the chances of leakage directly depend on both the number of specialists involved in the development process at different stages and the number of stages themselves. The purpose of this work is to develop an embedded module aimed at protecting software or its individual elements from illegal copying and further reproduction.

Keywords: software protection, information protection, embedded security module, hardware binding

The paper describes a multifactorial nonlinear regression model of revenue dynamics of the mining and metallurgical company Severstal, based on retrospective information for 2009-2021. Production volumes by type were used as independent variables: hot-rolled and cold-rolled sheet, galvanized sheet and sheet with other metal coating, rolled products, large diameter pipes, other pipe products and profiles. The criteria of multiple definition and Fisher, as well as the average absolute approximation error, were used as criteria for the adequacy of the model. A model competition was held to select the best regression dependence. As a result, a model is constructed containing inverse transformations of two independent variables in the right part.

Keywords: regression model, least squares method, adequacy criteria, mining and metallurgical company, revenue, model competition

Social and pension provision are key processes in the activities of any state, and the issues of forecasting expenses for them are among the most important in the economy. The task of evaluating the effectiveness of the pension fund has been solved by various methods, including regression analysis methods. This task is particularly difficult due to the presence of a large number of factors determining the activity of the pension fund, such as: the number of recipients of old-age pensions, the number of policyholders, self-employed policyholders, recipients of benefits, insured persons and working pensioners. As the main approach to the study, the method of implementing a model competition was applied. Those variants that violated the meaningful meaning of the variables and did not fully reflect the behavior of the modeled process were excluded from the resulting set of alternative model options. The final option was selected using the multi-criteria selection method. It is revealed that the use of relative variables is important for qualitative modeling of the studied processes. The above model shows that an increase in the ratio of the number of employers and the self-employed to the number of insured persons leads to a decrease in the cost of financing social and pension provision.The model can be effectively used for short-term forecasting of the total annual volume of financing of the pension fund department in the context of changing social and macroeconomic factors.

Keywords: pension fund, regression model, model competition, adequacy criteria, forecasting

This article considers the issue of the efficiency of roundwood production, which depends on the formation of high-performance forest machine complexes. The authors substantiate the problem of searching for optimal logging complexes for specific natural and climatic conditions. In this paper, the authors analyze the definition of a technological parameter, its essence and types. Also, the article describes the technological process of a feller buncher. The results of the analysis of technological parameters of feller buncher under different natural conditions are presented. Dependences of the productivity of a feller-buncher machine on various natural and climatic factors have been revealed. The authors proposed the information-logic and mathematical models of the work of a feller-buncher machine. A detailed analysis of the components of the technological process of a feller buncher is carried out. Further, a formula is proposed for calculating the productivity of a feller buncher. The results of the work are presented in the form of dependency graphs. The graph of the dependence of the time of movement of the machine to the group of trees subject to cutting, from the relief of the terrain and the graph of the dependence of the time of capture and cutting of the tree on the diameter of the tree in the place of the cut are given.

Keywords: feller buncher, technological parameters, technological process, productivity, logging process, process modeling

An important direction for sustainable development of domestic production is a complex use of wood resources. In Russia there is a large amount of wood resources. Waste is generated at all stages of logging and woodworking processes. Researchers estimate in the Russian Federation annually produces about 35.5 million m3 of wood waste. Wastes produced by various physico-chemical, size, quality and other characteristics. Range of directions of development of waste from the activities of the forest industry is also great. Depending on the type of wood waste can be used in different directions of the domestic industry. The increasing use of waste wood resources is the most important link in the development of policy, resource conservation, environmental management, environmental safety. The study is supported by RFFI (grant No. 15-46-04294) and KGAU "KKFPNiNTD" (project: "Development of expert system on environmental protection and recycling of various wastes of production and consumption")

Keywords: the use of wood waste, sustainable development, environmental protection, technology for logging operations, wood processing, forest residues, comprehensive utilization of wood, environmental management, forest residues

In article results of development of the mechanism of management of efficiency of use of wood resources at the timber industry enterprises are offered. It consists of five main stages, the implementation of which can decide whether the decision-making in certain areas of forestry development and individual businesses, as well as the development of strategic programs for their development. The proposed mechanism is tested on the example of Lesosibirsk’ timber industry in the region, allowing it to offer promising areas of development. Research is carried out with assistance of RGNF (grant No. 15-12-24003) and KGAU "KKFPNiNTD" ("Development of a control system of the forestry enterprise in modern conditions" project).

Keywords: the mechanism, management, efficiency, wood resource, complex processing, wood green, forest management enterprise