This study is devoted to the development of methods for the automatic assessment of the granulometric composition of ore after blasting based on data obtained from unmanned aerial vehicles (UAVs). Determining the size of ore fragments is an important step, since the effectiveness of subsequent crushing processes depends on its accuracy. Traditional methods of analysis use manual work, which requires considerable labor and is subject to subjective factors. The study examines modern machine learning methods and neural network architectures, such as Feature Pyramid Network (FPN), EfficientNet and SE ResNet, which can automatically and accurately segment images. As a result of the experiments, it was found that the VPN network with a pre-trained EfficientNet B2 base showed the highest IoU accuracy among the models.

Keywords: granulometric composition, FPN, Efficient Net, SEResNet

Abstract: This article is devoted to the formation of a methodology for determining the duration of emergency recovery work, in case of damage to buildings and their structures from the effects of force factors, which is an important industrial and social task. The main indicator adopted in this article for calculating the duration is the duration criterion (Upr). In the course of the study, factors were formed and grouped according to segmental characteristics, based on the degree of their influence on the duration of emergency recovery operations, a multiple regression equation was compiled, which allowed taking into account the influence of the most significant factors on a single assessment scale. The findings of the study are supposed to be used to determine the duration of emergency recovery work. Thus, the methodology for determining the duration of work is an important tool in the complex of measures for the effective conduct of restoration work and minimizing costs.

Keywords: emergency recovery work, organizational and technological model, method of expert assessments, multiple regression equation, capital construction project, technical condition of the building, force impact, ranking, duration of emergency recovery

This article discusses the use of secondary raw materials from industrial plants in the production of heavy concrete. This topic is very relevant nowadays, as the construction industry is expanding every year, and the need for concrete mixtures is increasing. Due to the increase in the production of concrete mixtures, the amount of natural raw materials used as a filler is reduced, therefore alternative raw materials are required to preserve natural reserves.

Keywords: construction, building material, industrial waste, secondary raw materials, environmental pollution, ecology, concrete mix, new technology

The paper presents the study of sound conductivity of a promising building material “Corrugated veneer”, the sequence of the study is presented, the installation for the study of sound conductivity is developed, the sound absorption and sound conductivity coefficients of the material “Corrugated veneer” are obtained.

Keywords: wood materials, finishing materials, building materials, board materials, veneer, laminated wood

The most important fields of 3d printing technologies. The patent's examples.

Keywords: 3d-printing, patents, civil engineering, industry, medicine

The article analyzes the placement of developed measuring devices for assessing the quality of blending of natural and chemical fibers in various spinning systems of cotton and wool spinning industry. The variants of installation of sensing elements on carding and draw frames are considered. Algorithms of interaction between microcontroller and personal computer in the automated measuring system are presented.

Keywords: automatic control systems, quality control of mixing in spinning systems, algorithms of interaction between microcontroller and personal computer

The construction industry is undergoing a significant shift toward technological advancement and 3D printing is one of the groundbreaking technologies leading the way. 3D printing technologies a widely protected by many patents, mainly in USA & China. Petrone's team are focusing on the integrity and performance of structures built using 3D-printed LEGO-like concrete modules.

Keywords: 3d - printing for Civil & Military Engineering, review of last year patents, 3D-printed LEGO-like concrete modules