Application of confidential intervals for verification of reservoir model at interpretation of well test data

The information on arguments of an oil reservoir to a well test from the point of view of the Bayesian inference are express through even allocation of odds in room of arguments. In article application of confidential spacing for a quantitative appraisal of the information receive from the analysis of results of well test which one are us for upgrading of allocations of odds are offered. Use of confidential spacing for an appraisal of a correctness of a choice of a laboratory formation are show

Woodworking facilities: Driving efficiency through Automation applied to major process steps

The investment scenario applied to forestry development analyzes the fundamental changes in the production structure, among other things. These changes refer to the priority development of the pulp and paper industry through the chain of large-scale woodworking facilities, where pulp, paper and cardboard manufacturing plants are the key links. Such facilities include sawmilling facilities, wood-processing factories, and timber factories. Those provide a significant economic benefit, so improving them is one of the top priorities. Considering this priority is the purpose of this article. The goal was achieved using common and scientific research methods, including mathematical modeling. Theoretical research resulted in three sets of formulas adapted for evaluating the pulpwood barking from theoretical findings on image recognition. © 2018 Authors

Efficiency improvement of forest machinery exploitation

The purpose of this work was to develop a model of the interaction process between the wheeled forwarder and the soil of the cutting area, which allows evaluating the influence of soil conditions, the parameters of the wheeled forwarder, as well as load and number of cycles of its application, on the indicators of resistance and adhesion of the forwarder to the traction surface. Modeling results for 3-and 4-Axle forest machines with different load levels showed that for different soil categories, types of bodies, and tire sizes. The results of the approximation analysis enabled the derive of calculation formulas for estimating the propulsive coefficient and rut depth after the first passage depending on the values of load-bearing capacity, body load coefficient, wheel width, and soil deformation module. The proposed model can be used at laying down the skidding roads and its optimization not only in economic terms but also with respect to the environment as intensive harvesting operations lead to extensive soil destructions. The practical application of the results is expressed in increased performance capacities of wood skidding operations and minimization of costs for restoring the productivity of forest area. © 2020 Polish Society of Technical Diagnostics. All rights reserved

ПРОБЛЕМЫ ВЫЧИТАНИЯ ФОНА ПРИ ИНДИВИДУАЛЬНОМ ДОЗИМЕТРИЧЕСКОМ КОНТРОЛЕ И РАДИАЦИОННОМ КОНТРОЛЕ НА ОТКРЫТОЙ МЕСТНОСТИ

In article the problem of an adequate estimation of individual doses of the personnel exposure, caused by the combined action of artificial (professional) and natural factors, is discussed. Results and problems of measurement of a dose rate of external gamma radiation on the open air are shown at the use of professional dosimeters with various levels of the «zero background». It is shown that for the correct account of the natural background, an exception of incorrect conclusions at a radiation control, maintenance of unity of measurements at radiating control on open air, it is necessary to prepare new methodical instructions of the Federal or departmental level.В статье обсуждена проблема адекватной оценки индивидуальных доз облучения персонала, обусловленных совместным действием техногенных (профессиональных) и природных факторов. Приведены результаты и показаны проблемы измерения мощности дозы внешнего гамма-излучения на открытой местности при использовании профессиональных дозиметров с различным уровнем «нулевого фона». Показано, что для корректного учёта природного фона, исключения неверных вы- водов при дозиметрическом контроле, обеспечения единства измерений при радиационном контроле на открытой местности необходимо подготовить новые методические указания на федеральном или ведомственном уровне

Dynamics of the Taxation Characteristics of Forest Stands in the North-West of Russia

Many researchers around the world show interest in forest ecosystems. Because the growth of forest stands depends on many environmental factors, forest stands can serve as study objects in research on climatic conditions and their role in forest architecture regulation. This study seeks to determine taxation indices of different tree stands to establish the possibility of forecasting the further course of forest development. The study sample includes forest stands with trees of different bonitet classes in the Leningrad region. The results show that climatic and other factors affect trees in different ways, depending on their species, age and location. The estimated height of pine in bonitet class II-IV is lower than the tabular one. The estimated diameter is higher than the tabular one in all cases except for one where stands consist of pine in bonitet class I. The biomass increment was smaller than expected in spruce trees of class III bonitet, pine trees of class II bonitet, and birch trees of class I bonitet. © 2022, HARD Publishing Company. All rights reserved

Comparative analysis of thinning techniques in pine forests

Thinning is a necessary and complex forestry activity. The complexity increases due to theoretical disagreements, contradictory recommendations, and errors of modern practice, which require confirmation through long-time experiments. This article presents a summary of experimental results from plantations established 20-30 years ago and explains concepts of the theory, methods, and regime of thinning in permanent sample plots of pine stands in Gatchinsky forest of the Leningrad region. The research results allow for the clarification of growth patterns and age dynamics of pine stands subject to heavy, low thinning, as well as the results of applying the crown (high) thinning technique and a mixed treatment. A combined thinning and fertilization could improve wood quality and yield compared to conventional methods. Of particular scientific importance is the analysis of change in tree diameter classes during growth and after thinning. The research results allow for optimizing the treatment regime in pine plantations and reducing labor intensity by increasing the intensity of thinning and reducing the number of techniques

Legal regulation of medical care with the use of telemedical technologies by regulatory acts of the Russian Federation

The purpose of the study was to determine the regulation of relations for the provision of medical care using telemedicine technologies by the regulations of the Russian Federation.Цель исследования – определение регламентации отношений по оказанию медицинской помощи с применением телемедицинских технологий нормативными актами Российской Федерации

Influence of different forest management techniques on the quality of wood

The issue of accelerated forestry plantation with high-quality wood using the best soils in terms of productivity, fertilizers, and intensive treatment has become quite relevant due to increased demand for forestry products and higher requirements for environmentally friendly use of forest resources. This paper presents the results of a study on the impact of various techniques for treating coniferous plantations, including thinning, fertilization, and herbicide processing, on wood quality key indicators. The paper examined the wood density, correlation of early and late wood zones, and the cell wall thickness for 38-year-old pine trees grown on the sample plots of Siversky leskhoz (Leningrad region, Gatchinskiy district) at different treatment and density control techniques. It has been established that the highest basis density of wood corresponds to the samples grown at the density variant of 1 t/ha and double herbicides treatment, and the lowest basis density value was recorded at the option of 4 t/ha with combined treatment. It has been shown that the increase of width index for early wood is influenced by the lower density of 1 t/ha and one-time herbicide treatment, for late wood – by the lower density of 1 t/ha and repeated treatment with herbicides. The increase in average cell wall thickness for early and late wood is observed when the density increases up to 4 t/ha and double herbicides treatment. The results obtained provide a valuable scientific contribution to general forestry knowledge and have practical value in plantation forestry. © 2021, Tech Science Press. All rights reserved

Predicting the Passability of Wheeled Tractors

Assessment of the tractor's passability plays an essential role in determining its capability to move under certain conditions. However, the operation of forest machinery may lead to soil deformation and degradation of its mechanical properties. Consequently, this study aims to develop a mathematical model for the tractor's crosscountry capability assessment and its impact on the soil. A predictive model was created as part of the study, which depends on the soil and the forwarder parameters. Some high-correlation dependencies of deformation modulus and cone index, specific tractive force, internal friction angle, and shear modulus on these parameters were established. The developed model can be used to analyze changes in rut depth and soil compaction factors after multiple tractor passages. Soil moisture content and temperature can influence the deformation rate, as drier and warmer soils tend to deform much faster. Furthermore, the proposed model can analyze the impact of forestry and agricultural machinery on soils. © 2022, Mathematical Modelling of Engineering Problems. All Rights Reserved

Modeling the effect of wheeled tractors and skidded timber bunches on forest soil compaction

An increasing demand for forest products incites a large number of log transportation operations, which may lead to negative consequences for the soil and the ecosystem as a whole. This paper is focused on establishing a mathematical model to estimate the soil deformation and compaction processes under tires of wheeled forest machines and individual components of the skidding system such as forwarder, limbs, butts, and tops of tree-lengths in high latitudes, permafrost soil and forests. The method applied is based on simulating the impact processes of elastic tires and the skidding system on the soil through a mathematical device for the measurement of the compaction parameters for different types of soil and the size of the shelterbelt. The effectiveness of the proposed models was evaluated according to experimental results. The influence of the rheological (elastic, viscous, and plastic) properties of soil were studied. The elasticity of tires and the running speed of forest machines can help to control the performance of forest machines. This can be done by reducing the pressure exerted on the soil and increasing the number of skidder passes 1.5-2-fold. Comparative analysis showed that the calculated data differ from the experimental ones by no more than 10%. The obtained results and the developed model will allow for a qualitative and quantitative assessment of technological impact on the soil during the projecting maps for logging operations. © 2021 Institut za Istrazivanja. All rights reserved