bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of Terrestrial Laser Scanning to Determine Deformations - Practical Aspects
Authors: Antova Gergana 
Published: December 2020

Abstract
When using laser scanning for deformation analysis of a given object, there are no pre-signalled points or identical points to compare between two epochs, so we can judge for whether an object deforms only by modelling the surface of the object. There are a number of challenges in this regard presented in the paper. The first challenge is that for the deformation analysis the configuration of the measurement parameters is no longer set by the surveyor-engineer by the number and position of the observed points, but from the laser scanner. Only the location of the scanner and the scanning density could be controlled. The second challenge is to expand the error model, as the surface modelling is included in the deformation process. This unifies both the metrological and the model errors that arise from the insufficient knowledge of the object and the simplification of its surface. All these challenges are oriented to the created 3D surface model. In addition, the metrological aspects of the use of laser scanners should be considered, especially for applications where the determination of the deformation requires high accuracy. A number of conclusions and recommendations are formulated. The influence of the factors influencing the accuracy of ground laser scanning in the deformation study is summarised, and the influence of the external orientation ang georefering of the point cloud on the accuracy of the digital model is established. Preliminary assessment of the accuracy of the TLS results are given. Justification of the reliability of the determined deformations through TLS is presented. Technological scheme and recommendations for determination of deformations with TLS is shown.
Increasing the efficiency of the tem-tdem method while searching for hydrocarbons in conditions of high electric conductivity of sedimentary-terrigenous complexes’ rocks
Authors: Dmitriyev Arkadiy Nikolaevich 
Published: December 2020

Abstract
A possibility to select theoretical signal models for the observed graphs E
obs(t) satisfactorily is shown to be steadily absent while prospecting using the TEM-TDEM method among Western Siberia’s high-electroconductive rocks. Examination of this problem showed Western Siberia’s rocks have a high reactive (inductive) resistance L alongside with ohmic resistance R. At the same time, thin oil and gas beds’ presence in those rocks causes an additional reactive-capacitive resistance Cdep
to appear under the influence of the applied electric field. Therefore, the process of field inducing in RLC-medium is completely different from the “classic” one which is described with only specific resistance ρ. Thereupon, transit process theory, based on process modelling with equivalent loops, was applied. In practice, TEM-TDEM method’s efficiency turned to be very high as the direct search characteristic – anomalous parameter Cdep
appears. All the parameter c’s anomaly contours predicted as hydrocarbon deposits are confirmed as such with deep drilling with the success coefficient almost equal 100%.
Characteristics Evaluation of Fluorescein Sodium as Fluorescent Tracer for Petroleum Wells
Authors: Pataveepaisit Harid , Srisuriyachai Falan 
Published: December 2020

Abstract
Fluorescein sodium (FluNa) is an organic xanthene-derivative fluorochrome appearing as crimson powder. In the form of solution, fluorescein absorbs blue light and emits green-to-yellow fluorescence under the incidence of visible or ultra-violet light. In petroleum industry, it is normally used as fluorescent tracer to determine reservoir connectivity between injection and production wells. In this study, fluorescein concentration at 10 ppm was critical concentration that reversed relationship between fluorescence intensity and fluorescence concentration. Emission wavelength at maximum fluorescence intensity became a function of fluorescein concentration until 512 nm at 1 ppm and there was no longer reduction of emission wavelength beyond this value at lower concentration. Fluorescence of fluorescein could not be observed by naked eyes at concentrations below 100 ppb, whereas its detection limit by fluorescence spectrophotometer could be lowered to 1 ppb. Fluorescence spectra of fluorescein concentrations at 10 ppt and 100 ppt were similar to those of tap water, formation water, and deionized water. Therefore, detection limit of fluorescein was determined to be at 1 ppb. Fluorescence of fluorescein was photodegraded by light up to 30% when stored inside transparent glass bottles and being exposed to light for 7 days and fluorescence of the solution became darker with time. On the other hand, fluorescence intensities of FluNa solution stored inside amber-coloured glass bottles in both all-time concealment and normal room conditions were almost identical. Fluorescence spectra of the solution at pH of 3 had lower fluorescence intensity and shorter emission wavelength at maximum fluorescence intensity than the solutions at pH of 7 and 11 that were mostly identical. Fluorescence of fluorescein was not affected by temperature in the range of 30-70°C for 12 days. Hence, the storage conditions for fluorescein solution were recommended to be stored inside amber-coloured glass bottle to prevent photodegradation with pH 7 or above.
Method for calculating and evaluating the total energy capacity of cotton fiber
Authors: Isakov A , Tukhtamishev B , Choriev R 
Published: December 2020

Abstract
This paper discusses the need to save material and fuel and energy resources, requires a new approach to their accounting, qualitative and quantitative assessment, and, in particular, to their use. The correctness of planning and forecasting the levels of mining, production and distribution of resources, and, as a consequence, the clear functioning of industrial and household consumers, depends on this. As the first stage of the calculation, an analysis of energy consumption was performed for the following groups of their consumption: field work; production of mineral fertilizers used in cotton growing; water supply for cotton fields (pumping stations, vertical drains); preparation points and cotton processing enterprises. According to consumption groups, energy capacity is: field work 41%, mineral fertilizers 14% and irrigation 45%. The analysis of the obtained results shows that cotton production occupies a rather large place in the total energy consumption in the republic and its savings at each stage of agricultural work and in industrial processing can give significant results in increasing the efficiency of saving the country’s fuel and energy resources.
Theoretical basis for the movement of a pulsed current discharge through a plant organism
Authors: Toshpulatov N 
Published: December 2020

Abstract
The article presents the current state of the problem of contamination of cultivated areas with weeds. A tribute to the analysis of scientific and technical information on weed control, their advantages and disadvantages are described. Theoretically substantiated processes are the destructive effects of electric discharges of current on plant tissue.
Study the effect of the design of discharge electrodes on the characteristics of the corona discharge
Authors: Isakov A , Rakhmatov A , Ismailova Z 
Published: December 2020

Abstract
The article discusses the development of electric ionizers for fruit storage. Based on the technological requirements, the design parameters of the electric ionizer were determined, the current source and operating modes were analyzed and appropriate conclusions and solutions were developed. Optimal quantities of basic geometric sizes specific to needle electrodes are recommended.
Problems of integration of the photovoltaic power stations with the grid systems
Authors: Mirzabaev A , Isakov A J , Mirzabekov Sh , Makhkamov T , Kodirov D 
Published: December 2020

Abstract
The analysis of the factors of renewable energy sources (mainly solar ones) integration with the central grid was conducted in the paper. Various problems arising during integration, solved in Uzbekistan through the development and adoption of a modern legislative and regulatory framework were described. Various aspects of solving the problem were considered, including research work intensification in this direction.
Electrotechnological approach for effective storage of fruits and vegetables in farms
Authors: Ibragimov M , Rakhmatov A , Tadjibekova I 
Published: December 2020

Abstract
It is proposed to use the ozonation method in vegetable and fruit storage facilities of farms that are not equipped with refrigerators. Ozone is a strong disinfecting agent against putrefactive microorganisms. The results of the treatment of apples and carrots with various doses of ozone are given. The effectiveness of this processing method has been verified.
Determination the installation efficiency of the evaporative air cooling in the greenhouse by temperature-moisture regime
Authors: Anarbaev A , Tursunov O , Zakhidov R , Kodirov D , Vakhidov U , Bozorov E , Tuhtaeva G , Babaev A 
Published: December 2020

Abstract
The results of theoretical studies and experiments of the developed exhaust ventilation system with direct evaporative air- cooling with using “wet mats” are given. It has shown sufficient efficiency with increasing quality of flower cutting in the summer months. The effect of moisture on the operation of this system was studied. It is established that the heat absorption capacity of air directly depends on its temperature and relative humidity. It is also determined that the temperature of leaves and flowers in summer is usually 2 ÷ 7 °C greater than the air temperature in the greenhouses. In an experimental greenhouse, according to the results of experiments, the effectiveness of the developed installation for evaporative cooling of its operation was determined.
Influence of the ultrasonic irradiation on characteristic of the structures metal-glass-semiconductor
Authors: Kuchkarov B , Mamatkarimov O , Abdulkhayev A 
Published: December 2020

Abstract
The studied influence ultrasonic irradiation on change the rolling charge built-in in structure lead borosilicate glasses PbO - SiO2 - B2O3 - Al2O3 - Ta2O5. It is shown that influenc ultrasonic irradiation brings about reduction of the rolling charge and improvement insulation parameter glass.
Estimation of the error of a magnetic modulation non-contact wide-range device for non-destructive control of high amperage currents
Authors: Plakhtiev A M , Baratov R J , Gaziev G A , Doniyorov O Ch , Norkholboyev D Sh 
Published: December 2020

Abstract
The paper provides information on use of direct current (DC) energy in the electric power supply industry of agriculture and water management, hydraulic engineering construction, metallurgy, irrigation and melioration. The need for non-contact non-destructive control of high amperage DCs of high-capacity electrical installations in irrigation and melioration, hydraulic engineering has been identified. The basic requirements for non-contact transducers and sensors of high amperage DC measurements without circuit breaking are formulated. Identified priority directions in the development of above mentioned transducers. The general construction principles of non-contact ferromagnetic transducers of high amperage DCs and the results of the development of one of the modification of the developed wide-range magneto modulation contactless transducers of high amperage DCs and a device based on it are given. It is shown that the developed transducer and device, as distinct from the known ones, have increased accuracy and sensitivity, technological design and small weight and dimensions with low material consumption and cost. The error estimation of the developed magneto modulation non-contact wide-range device for non-destructive control of high amperage currents is carried out and it’s RMS (root-mean-square) and entropy errors are estimated. It can be widely used in power systems in irrigation and melioration, in water supply system, industry, railway transport, science, technology and for testing power meters at their installation site for contactless control of DC and also ACs (alternative currents).
Study on Ion generators for fruit and vegetable storehouses
Authors: Rakhmatov A , Ibragimov M , Ximmataliev D 
Published: December 2020

Abstract
The development of food industry and fruit and vegetable production is currently determined not by the amount of production, but by how much of it is preserved. Therefore, the introduction into fruit and vegetable production plan the task of loss reduction of food raw materials at all stages of its transportation, storage and processing was a timely and important step. This paper presents the results from the influence of ionizer structural and operating parameters on the energy performance of the ionized air. The data on optimal modes, that ensure the minimum product losses during long-term storage, are given.
Intellectual system for water flow and water level control in water management
Authors: Djalilov A , Juraeva N , Nazarov O , Chulliyev Ya , Sobirov E , Begmatov M , Urolov S 
Published: December 2020

Abstract
Currently, the shortage of water in our country is growing. This means that we must support every drop of water. At the same time, water management systems in advanced economies are used to measure and monitor water flow and water meters with different designs. Existing measurement and control systems have some drawbacks in energy saving. Therefore, the issue of improving water and energy saving water flow devices and rights management levels was considered.
Mobile installations for electro treatment of soils and plants with the use of photovoltaic systems as power supply
Authors: Anarbaev A , Muxammadiev A , Umarov S , Tursunov O , Kodirov D , Khushiev S , Muhtarov F , Muzafarov Sh , Izzatillaev J 
Published: December 2020

Abstract
The technology of electro processing by UV- radiation for cultivation of cotton is considered. By results of experimental researches optimum parameters for treatment soils with ultraviolet radiation lamps for increasing the accumulation of the most mobile nitrate forms of nitrogen are defined. Prospects of transition of UV-lamps to light-emitting diodes (LED) as way of improving efficiency of processing, and creation of independent power supply by means of photo-electric batteries are shown.
Study on increase of operation efficiency of electrical energy and electrical equipment
Authors: Isakov A J , Abdullaev Z S 
Published: December 2020

Abstract
This article discusses and reveals the problems of the need for proper use of electricity and electrical installations to improve efficiency. Information on the structure of installed capacity at power plants, the structure of fuel consumption and the consumption of electricity by consumers are reviewed and given; as well as information about the increase in efficiency and causes of failure in operation. Agro-industrial complex consumes about 30 percent of all electricity produced in the country (including the rural population), including pumping stations. This figure is expected to reach 45-50% over the next few years. Thus, the choice, design, installation, maintenance and repair of electrical equipment, which have different forms of ownership and management, but are interconnected by consumers in strict accordance with the rules of electricity consumption, Joint modernization, that is an operating efficiency, remains relevant.
Metrobus in separated corridors as an optimal public transport system
Authors: Berdiyorov T 
Published: December 2020

Abstract
One of the factors in the worsening of the quality of transport services is traffic delays which caused by constant and numerous congestion. In this article analyzed need of BRT-Bus Rapid Transit system which is serving in separated corridors for optimizing passenger turnover. Metrobus is a modern type of optimal public transport system, which is developed such cities Berlin, Curitiba, Ahmadabad, Istanbul, Seoul and etc. According to the above researches, the construction of a reliable transport system will allow increasing the level of transport accessibility, reducing the level of transport discrimination of the population, increasing the transport mobility of the population and improving other indicators characterizing the effective work of public transport in the city as a whole.
Reducing the cost of backfill in the Kauldi gold mine
Authors: Mahmadoliev A K , Makhmudov D R , Nurboboev Y T , Pardaev F Sh 
Published: December 2020

Abstract
The Kauldi gold mine uses the backfill to control the mining pressure. Backfill should be able to effectively manage the pressure of the deposit, ensuring safe working conditions, easier preparation process as well as little funds. The cost of backfill directly affects the cost of ore and is important for the indicators of economic development of the mining enterprise. In this article, the method of reducing the costs spared by making changes to the composition of the backfill used in the Kauldi gold mine has been studied. Ore extraction is carried out in the stopes. After the primary stope is extracted and filled with backfill, the secondary backfill is extracted and filled. In the proposed method, 1/3 of the primary stope and 2/3 of the secondary stope are filled with burden. The remaining parts are left unchanged. The reason for such a distribution of the burden in the stopes is that if the backfill in the primary stope is not sufficiently solid, the ore can also be diluted and the backfill is broke-down when extracting the secondary stope. If this happens, the ore will degrade and cause excessive backfill costs for the secondary stope. Filling the stopes with burden is considered cost-effective, and in general, the amount of cement, sand, as well as marble waste purchased for the mining enterprise is reduced twice. As a result, the costs spent on them will also be reduced twice.
Properties of metal-based and nonmetal-based composite materials: A brief review
Authors: Makhkamov N Y , Yusupov G U , Tursunov T , Djalilov Kh 
Published: December 2020

Abstract
At present, the prospects for the progress of structural materials are mainly associated with the development and widespread use of composite materials. The aim to improve the existing designs, to create new materials opens up the opportunities for the implementation of new design solutions and technologies. The article outlines one of the pressing problems - the need to develop new structural materials such as composite ones. Two types of structural materials are considered in the article: composite materials on a metal basis and composites on a non-metal basis. Technical-technological, physical, technological, mechanical and chemical characteristics and properties of composites are given. Based on the analysis, the properties of unidirectional composite materials on a metal and non-metal basis are revealed. As a result of this review, the fields of application of composite materials on a metal and non-metal basis were determined.
An overview on the experimental methods for the evaluation of properties and durability performance of RCA-containing concrete
Authors: Ngenge J P L , Akpinar P 
Published: December 2020

Abstract
The usage of recycled concrete aggregates (RCA) originates from buildings’ demolishing and increased demand in construction. Demolishing could be due to completion of building’s service life or its pre-mature failure as well as due to other reasons such as wars or earthquakes. In such cases, wastes of demolished buildings pose a threat to nature. RCA usage avoids the environmental degradation resulting from excessive extraction of raw materials to produce natural aggregates (NA) and storage of waste materials from devastated structures. Since RCA originates from construction waste, it becomes important to ensure the quality of new structure to be erected using RCA. From this perspective, the examination of general properties and long-term durability of RCA is vital. Hence, an understanding on the critical parameters to be inspected and experimental procedures are essential. This paper aims to provide a compact overview on the crucial parameters defining the quality, properties and the durability of RCA-containing concrete for the civil engineers and researchers aiming to work in this field. The adopted approach for this study implies a systematic literature review that copes with collecting essential information on this topic from existing respected studies from all around the world and the standard codes covering practices for related issues. The found results asserts that, performing tests on each type of waste materials irrespective of theirs sources is vital. For structural usage, the replacement of RCA with respect to the NA shall not be more than 30%. Finally, the usage of finer RCA shall be minimum for the better performance of RCA-concrete containing.
The Influence of ultrasonic strengthening treatment on microhardness of the construction materials surface with different initial structure
Authors: Abdumuminova D T , Lesyuk E A , Erofeev M N , Kravchenko I N , Deryabin A I , Yuldashev Sh U 
Published: December 2020

Abstract
The description of the method of ultrasonic surface hardening treatment (UST), which makes it possible to form gradient structures in structural materials, is given. This paper presents the results of the effect of UST on the surface microhardness of coarse-grained, ultrafine-grained and nanostructured titanium nickelide. The work is devoted to the study of the effect of ultrasonic hardening surface treatment on the surface microhardness of structural materials with different initial structures (coarse-grained, ultrafine-grained, nanostructured).
Determination of reduction of useful volume in water reservoirs due to sedimentation
Authors: Arifjanov A , Gapparov F , Apakxujaeva T , Xoshimov S 
Published: December 2020

Abstract
To develop a work plan for reliable and efficient use of water reservoirs, an accurate information about the volume of water stored in the reservoir for the safe operation of the reservoir facilities is necessary. The useful water storage capacity of reservoirs has been steadily declining over the years due to the sedimentation coming with the stream.
The article presents a method for determining the continuous change of the reservoir volume during operation due to sedimentation. A calculation method estimating the dynamics of the sediment distribution in the reservoir has been scientifically developed. The proposed calculation method was tested and compared in the field conditions. The analysis of the data collected in the Chimkurgan, Tashkent and South Surkhan water reservoirs under field conditions based on mathematical statistical methods showed a relationship between the relative turbidity and the reservoir depth. A new method of determining the decrease in useful water volume due to sedimentation in reservoirs has been proposed.