bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of Unit Length on Pavement Roughness Evaluation Results Based on Driving Vibration Data
Authors: Chen Guanghua , Zhang Jinxi
Published: April 2021

The method of evaluating pavement roughness with vibration acceleration data collected by smart phones is influenced by many factors, of which the length of pavement evaluation unit is an important one. In order to explore the influence of evaluation unit length on pavement roughness evaluation result with vibration data, this paper carried out a driving experiment, used the self-developed smart-phone APP acquisition running-vehicle vibration of data, used the multi-function checkout automobile detection of pavement smoothness, and established the relationship models of pavement roughness — vibration index and speed index when the evaluation unit length are 100 m, 500 m and 1000 m respectively. The results showed that when the unit length is 1000 m, the accuracy of the evaluation model is the highest, and the determination coefficient reaches 0.876. The verification experiment also proved that the evaluation model has good accuracy and stability. And also it was showed that the accuracy of the pavement roughness evaluation model increases with the increase of the length of the evaluation unit, which may be related to the matching error between the vibration data and the pavement roughness. How to improve the accuracy of the evaluation results about the short unit is the key content to be studied in the future.
Study on the Efficiency of Prestressing Application in Prestressed Composite Bridges
Authors: Qi Bing , Zhang Chao , Dong Shun , Chen Quansheng , Tang Jian
Published: April 2021

In order to study the proportion of prestressing between concrete slab and steel girder in different forms of prestressed composite bridges, this paper analysed the distribution of prestressing between concrete slab and steel girder when conventional prestressing method and post-tensioned prestressing method were used in the negative moment region respectively, against the background of a certain project. The results showed that 43.65% of the total prestressing applied by the conventional prestressing method was transferred to the steel girder, and nearly half of the prestressing tendons failed to reduce the tensile stresses in the concrete slab; the use of post-tensioned prestressing reduced the number of prestressing tendons by 65.6% relative to the traditional prestress application method.
Research on the Deformation Behaviour of the Track Interlayer Structure during the Deviation Correction of the Offset Ballastless Track
Authors: Liu Hao , Liu Jing , Jiang Ziqing , Wang Hanmin , Zhang Yongchao , Song Song , Li Ying
Published: April 2021

In view of the problem that the large deviation of the ballastless track structure affects the smoothness of the line due to the complex geological environment, in order to realize the deviation correction and repair of the offset ballastless track within the skylight time to restore the smoothness of the line, we researched the technology and process of ballastless track structure deviation correction and repair based on polymer chemical debonding, and the deformation and evolution behavior of the ballastless track interlayer structure during deviation correction and repair. The results show that by polymer chemical debonding and lifting technology, it ensure that the track structure is completely separated from the cement graded gravel layer, and significantly reduce the adhesion and friction between the base plate and the surface of the foundation bed, which creates conditions for the successful implementation of deviation correction. By the step-by-step loading and synchronous push control, the track slab and support layer are uniformly stressed and deformed synchronously. There is no track structure cracking loss, interlayer bonding failure or dislocation damage. The engineering tests show that the developed deviation correction technology can ensure the deviation correction and repair of the offset ballastless track structure without damaging the ballastless track structure.
Effect of Carbon Fiber on Microwave Deicing Efficiency of Pavement Concrete
Authors: Meng Xin , Bai Erlei , Xia Wei , Huang Zhe , Wang Zhihang
Published: April 2021

Snow and icing on roads in winter will bring serious consequences to traffic safety. Microwave deicing, as a new type of environmentally friendly road surface deicing method, has the characteristics of environmental protection, pollution-free, and high ice removal rate, but its low deicing efficiency limits its use. Carbon fiber has good electrical and thermal conductivity, wear resistance, etc., and can provide a new composite material for road surface deicing. Taking carbon fiber concrete as the research object, the effect of different carbon fiber length on the microwave heat absorption efficiency of concrete is studied. The results found that: as the length of carbon fiber increases, the temperature rise at the same time increases exponentially, the higher the efficiency of carbon fiber concrete for absorbing and heating.
Full-Scale Model Experimental Research on Concrete Construction Technology of Steel Shell Immersed Tube Tunnel
Authors: Xia Fengyong , Song Shenyou , Xu Wen , Zuo Wenqiang , Xie Biao
Published: April 2021

A full-scale model experiment was carried out to research the effects of the Self-Compacting Concrete (SCC) construction technologies including SCC working performances, casting speeds and the arrangement methods of vent holes on the filling quality of the steel shell immersed tube tunnel compartments. The experimental results showed that in order to guarantee the bearing capacity of structure mainly by reducing the voids as many as possible to meet the related requriements of Guide, the total area ratio of voids with the depth more than 5.0 mm in the whole top surface of compartments must be less than 5%, the initial slump flow of SCC should be improved to 670±50 mm on account of the flowability loss caused by the particle migration of coarse aggregates during pumping and at least ten vent holes distributed around the top plate of a steel shell compartment parts of which were located on the both ends of T ribs far from the pouring holes are needed, simultaneously the appropriate pouring speeds of SCC are respectively 30 m3/h and 15 m3/h when the distances from fresh concrete level to compartment roof are more and less than 20 cm.
Vibration Measurement and Analysis of High Speed Railway Based on Wavelet Analysis
Authors: Song Rui
Published: April 2021

In order to better study the vibration characteristics of railway viaduct, field test and pulsation test are carried out for the bridge vibration caused by the operation of a high-speed railway train. The natural vibration frequency of the bridge is analyzed, and 1 / 3 octave analysis and wavelet analysis are carried out for the vibration signal caused by the train excitation. The analysis results show that: the measured value of vertical frequency of bridge is close to the theoretical value, and the measured value is slightly larger than the theoretical value; the wavelet analysis results show that the vibration energy of the measured points is mainly concentrated in the third frequency band (15.625 ∼ 31.25 Hz), the fourth frequency band (31.25 ∼ 62.5 Hz) and the seventh frequency band (250 ∼ 500 Hz). Compared with the urban viaduct, the vibration and noise analysis of high-speed railway bridge should be appropriately extended to 500 Hz. The time-frequency diagram shows that the main vibration frequency range of the bridge is about 30-60 Hz.
Research on Steel Slag Resin Mixture Used in Rapid Repair of Pavement Damage
Authors: Han Yafang , Wu Di , Xu Jie , Liao Zhike , Sun Yangyong
Published: April 2021

In order to explore the pavement performance of steel slag for pavement damage repair, steel slag, river sand and resin binder are mixed in proportion to prepare steel slag mixture. The test results show that the steel slag mixture has excellent high temperature stability, water stability, low water absorption and low expansibility. The engineering application shows that the steel slag resin mixture has no quality problem after being used to repair the pavement damage for half a year. At the same time, it can also solve the problem of environmental pollution caused by the solid waste of steel slag, which has good social benefits.
An Intelligent Algorithm of Operation and Maintenance Cost Based on BIM of the Utility Tunnel
Authors: Wen Zhongjun , Zhou Wenyong , Zhao Yijng , Zhao Lin
Published: April 2021

Through analyzing the relationship among the utility tunnel components, disaster risks and cost and the importance of BIM technology to integrated component information, disaster risk information and cost information, a component-disaster-cost data model based on BIM technology is built to realize dynamic recording of operation and maintenance cost and structured storage of operation and maintenance cost data. Based on the cost data model, the data flow of operation and maintenance cost analysis is established, artificial intelligence algorithm is introduced, deep learning, data analysis iteration is carried out, decision-making is assisted, and the healthy development of intelligent pipe gallery construction is promoted.
Artificial Ground Motion Input Based on Structural Dynamic Compatibility
Authors: Wu Zuoju , Li Honglei , Ou Yangfang , Duan Shusu
Published: April 2021

The artificial ground motion input currently used is arbitrary and uncertain. It can only consider basic elements such as magnitude and preliminarily estimated epicenter distance. This is in sharp contrast with the increasingly accurate calculation of structural seismic response. It is a bottleneck for the further refinement of ground motion research. In order to solve this problem, an artificial ground motion input mode compatible with the dynamic characteristics of the target structure is constructed. It can greatly improve the safety of the building in the architectural design stage without increasing the cost excessively. Obviously, the model is more targeted, safe and reasonable.
Out-of-Codes Seismic Analysis on a Science Museum under Rare Earthquake
Authors: Zhang Qiming , Liu Xingang , Zhao Yashuo
Published: April 2021

Take the example of a science and technology museum where the upper part is a steel structure and the lower part is a concrete shear wall structure. The performance-based design goals of the structure under rare earthquake are put forward. The performance of the structure under rare earthquake is analyzed considering the joint work of steel and concrete structure. Results show that the structure can meet the performance goals, the structure is safe, and some seismic strengthening measures of the structure are given based on the results.
A 220KV Transformer Equipment Vibration Damping Calculation
Authors: Fang Xiangyang , Li Shiyong , Zhang Zihe , Ji Guangbin , Liu Mengxuan
Published: April 2021

Considering the current poor seismic performance of pillar equipment in substations, for pillar equipment transformers, the ANSYS software is used to establish the corresponding finite element model, and the analysis of the finite element model without and with the shock-absorbing device is carried out under the effect of earthquake through the time course analysis method. The results show that the overall seismic performance of the transformer equipment is significantly improved by installing the vibration damping device, and after evaluation by the safety factor method, the equipment without vibration damping device does not meet the safety factor requirements of the code but the equipment installed vibration damping dose.
Study on Numerical Simulation of Airflow Distribution in Hot Pump Drying Room of Peppercorns
Authors: Cheng Kaili
Published: April 2021

With the transformation of China’s agricultural development direction and the vigorous promotion of healthy green condiments, the demand for drying materials such as pepper powder, grain and fruit is increasing, while the traditional drying method is low in efficiency, long drying time, and materials are easy to be contaminated by sediment and various microorganisms. So this article use numerical method to simulate the heat pump drying room air distribution, by changing the internal disturbance conditions, different drying stage and the different initial conditions, characteristics of flow field inside the drying room changes, buoyant jet is analyzed in different initial velocity, initial temperature and the effect of flow field characteristics of Chinese prickly ash drying room; The purpose is to provide theoretical support and design guidance for the design of the hot pump-type pepper drying room.
Effect of Cross-Section Dimension on the Safety of Transmission Tower
Authors: Wang Mengyao
Published: April 2021

The safety of power transmission tower directly affects the supply of electricity. If the designed power transmission tower could not bear the strong wind, the collapse of transmission tower would lead to the power outage. In this paper, we analyzed the safety of transmission tower subjected to the strong wind of level 10 by using a finite element method. Commercial software Abaqus was used for simulating the mechanical response of transmission tower. Finite element model was introduced to complete the static analysis of truss structure. Ten kinds of cross-sections were chosen to assess the safety of transmission tower. According to the simulated results, both the maximum stress and the maximum displacement decrease with the increasing cross-section dimension. When the cross-section dimension is less than a certain value, the designed power transmission tower could not safe under the strong wind of level 10.
Interactive Landscape Renovation Based on Sustainable--Take the Tingrui U-ME Landscape Design Project as an Example
Authors: Zhang Yin , Yang Huihong , Wei Shiqing
Published: April 2021

In this paper, from the perspective of humanism, aiming at the existing buildings in the modern commercial space, the problem of the trap of consumerism, as well as lack of humanistic care in landscape and architecture, the landscape renovation design is carried out. We explored the people psychological experience in the commercial landscape, tried to integrate interactive elements, new materials, various energy savings and other methods into the commercial landscape, so as to improve the relationship between the commercial landscape and people, replace passive appreciation with landscape subjective initiative, further improve the harmonious man-machine environment, and build a beautiful and harmonious landscape environment.
Unified Wall Function and Application for Steady Turbulent Pipe Flow with Uniform Wall Roughness
Authors: Pan Wenhao , Liu Shihe , Shang Qin
Published: April 2021

A newly developed wall function for the velocity-profile of steady turbulent flow in various hydraulic regimes near rough walls was created. The wall function was then applied into two approaches to obtain the total flow energy loss (mechanical energy loss) of turbulent pipe flow. The energy loss values calculated through the above two approaches both predicted the experimental results well. The energy loss coefficient calculated through the second approach gave a more precise definition of the total flow characteristics than the Manning roughness coefficient as it was proved to be a function of the field statistics. It was furtherly found that this energy loss can be decomposed into the energy loss due to dissipation caused by molecular viscosity and the dissipation of turbulent kinetic energy, and that its density distribution falls mainly into the near-wall region.
Study on Unconfined Compressive Strength of Zinc Contaminated Soil Solidified by Magnesium Phosphate Cement under Acid Rain
Authors: Huang Zhanjun , Zhou Qihui , Liu Zunjing , Zhou Bohao , Zhou Hongli
Published: April 2021

In this article, through the preparation of artificial contaminated soil in laboratory and simulated acid rain pollution to zinc magnesium phosphate cement (MPC for short) solidified soil erosion, the unconfined compressive strength characteristics of a single heavy metal (Zn) pollution under the above conditions was studied. In addition, water glass was added to improve the acid resistance of magnesium phosphate cement solidified soil. The effects of the mixing ratio of curing agent (MgO/KH2PO4, M/P for short), initial pH value by simulating acid rain, and the water glass content on the physical and mechanical properties of solidified zinc contaminated soil were analyzed. Studies have shown that when M/P=4, solidified soil contaminated by zinc has better solidification strength and solidification effect than M/P=6; adding water glass can increase the unconfined compressive strength of solidification of zinc contaminated soil by cement. 4% water glass content has a better effect to improve the strength of solidified soil; When the cement with M/P=4 has better engineering characteristics and acid resistance than that with M/P=6. Therefore, water glass can improve the engineering properties of solidified soil contaminated by zinc under sour environment effectively.
Conventional Monitoring Methods and Improvements in Public Geohazard Monitoring and Prevention
Authors: Liu Yi , Zhao Binbin , Kong Xiaoang
Published: April 2021

Monitoring is the key part of public geohazard monitoring and prevention. However, the data quality obtained by current monitoring methods in public geohazard monitoring and prevention is poor. Although thousands of landslides are monitored, but the results can hardly be excavated. To solve those problem, by repeatedly groping and trying, we have improved the monitoring methods or devices in the aspects of macroscopic deformation, ground fissure, building cracks and groundwater. The following results are obtained: For macro deformation, taking photos with smart phone can monitor, storage and transfer macro deformation information. For ground fissure, high precision data can be obtained by construction solid piles and measuring with digital convergent- meter. The mortar strip can accurately reflect the ground cracking and solve the problem of crack closure. For building cracks, layout steel nails across the cracks and measure the distance with vernier caliper can obtain high precision data. The improved sticker method can obtain the deformation rate of wall cracks. For groundwater level, the water level data of low cost and high precision is obtained through the development of the multimeter water level meter.
Experimental Analysis and Study on the Effect of Glue Addition Rate on the Performance of Sponge City Permeable Brick
Authors: Chen Xiaoxia , Zheng Xianchao , Liu Changchun , Zhao Hanfei
Published: April 2021

Sponge urban construction has become one of the heated topics in the fields of science and technology, and faces many disputes. There are different opinions and cognitions to the connotations, objectives, contents and effects of sponge urban construction. But investigating its foundation of sponge city is the basis of the permeable brick. The purpose of this test is to find the optimum mix ratio of permeable bricks, that is, to make them have good permeability on the premise of satisfying certain strength. Through experiments, aggregate cement ratio is fixed; water cement ratio and gluing ratio are adjusted. The conclusion is that the best mixing ratio is aggregate cement ratio 3.5, water cement ratio 0.38 and gluing ratio 2%, which is to meet the requirements of the sponge city for the compressive strength and permeability coefficient of single brick.
Numerical Simulation on Thermal Performance of the Sinusoidal-Corrugated Solar Air Collector
Authors: Li Shuilian , Li Hong , Wei Xinli
Published: April 2021

Solar air collector is a heating device of using air as heat medium, and can be widely applied to solar heating, ventilating, dehumidifying and other fields. However, these devices also set low efficiency and large heat loss. How to further improve the thermal efficiency is always the goal pursued by researches. This article from the change of the absorb plate shape to begin, put forward sinusoidal-corrugated solar air collector, and the thermal performance of sinusoidal-corrugated solar air collectors was studied by numerical simulation with using CFD software, and conclusions shows that the thermal efficiency of parallel model is higher than that of vertical model by comparative analysis. Type S, type U and type X were studied by numerical simulation. Results show that type X is the best of three types.
Simulation of Point Source Pollution Transport Process in the Lower Yellow River during Non-Flood Season
Authors: Zhang Fangxiu , Wang Ming
Published: April 2021

The water body in Yellow river has poor ability to dilute and degrade pollutants during non-flood season due to less upstream inflow, which leads to pollution during non-flood season more serious than flood season. In order to evaluate the transport process of point source pollutants in the lower reaches of the Yellow River during non-flood season, a plain two-dimensional water quality mathematical model was established to simulate the horizontal and vertical propagation range of pollutants such as COD and petroleum below the outfall. Analysis of the migration regulation of pollutants in the river was performed. The results indicated that in the case without external pollution, the influence range of the emission of point source pollution during non-flood season is a certain range downstream of the sewage outlet. The concentration of pollutants at the outlet side is greater than that the other side until the distribution of pollutants across the section tends to be consistent, which provides technical support for assessing the impact of point source pollution on water environment during non-flood season.
Assessment of Coupled Effect of Steam Pipes on Seismic Analysis of Reactor Coolant System
Authors: Li Lijuan , Liu Zhenyu , Li Hui , Ye Xianhui , Ai Honglei
Published: April 2021

Reactor coolant system is connected with auxiliary pipes, surge pipes and steam pipes. In order to facilitate the dynamic analysis of reactor coolant system, it is necessary to decouple the pipes connected with the reactor coolant system. Although some international standards stipulating requirements for the decoupling of subsystems from the main system, in order to further explore the influence of decoupling steam pipes, the seismic response of reactor coolant system with or without steam pipes is simulated by using ANSYS program. Firstly, the modal analysis of reactor coolant system is carried out to analysis the influence of steam pipes on the resonant frequency of reactor system. Then, the standardized seismic dynamic analysis of reactor system with or without steam pipes is carried out. The nozzle load (inlet and outlet nozzle load of main device, such as reactor pressure vessel, steam generator, pump) and support load (of main device such as reactor pressure vessel, steam generator, pump) are output and compared. According to nozzle load and support load, it can be seen that the steam pipes have little influence on the seismic analysis of reactor coolant system, i.e. steam pipes can be decoupled in the seismic analysis of reactor coolant system.
Monitoring and Analysis of Ground Deformation in Mining Area Based on SBAS Technology
Authors: Li Qianwen , Yan Qianqian , Zhang Tongkang
Published: April 2021

In view of the serious harm and significant economic loss caused by large-scale surface subsidence in Huangling Mining area. Firstly, the surface deformation information was obtained by using the Small Baseline technology during 2007-2009 (ALOS-1) and 2018-2019 (Sentinel-1A), and then the deformation position and magnitude changes were compared in these two different periods, finally, the time series analysis of the surface subsidence funnel in the mining area was performed. The results showed that: (1) The average annual deformation rate respectively reached 360 mm/a and 480 mm/a during 2007-2009 and 2018-2019. It was found that compared with 2007-2009, the deformation position moved up in 2018-2019, and the deformation area and magnitude increased. Combined with the analysis of the mining area data, the Huangling mining area was in the early stage of mining from 2007 to 2009. As the advance of mining working face and the passage of time, the deformation position would move up in 2018-2019. (2) From 2018 to 2019, the most serious surface subsidence in the Huangling mining area was located in the northwest of Shuanglong Town, including Huangling No. 2 Coal Mine. The maximum cumulative subsidence reached 300mm. The results of the study indicated that the main cause of subsidence in this area was underground coal mining. The analysis of the deformation law provides a decision basis for the subsequent rational mining and treatment of the mining area.
Stability Analysis of Coal-Measure Soil Slope Based on Discrete Element Method
Authors: Wu Can , Zhang Bang , Zhang Hong
Published: April 2021

This paper uses the discrete element method to take the Pinglian high-speed coal-measure soil slope as the background, which uses PFC3D to calibrate the parameters, establishes the slope model, and analyzes the factors affecting the instability of the coal-measure soil slope from the granular meso-level. The results show that the discrete element method can be used to simulate the entire process of slope deformation and instability, and the sliding surface of the slope failure can be directly displayed through the displacement of the soil; the nature of the particles will affect the stability of the slope. The larger the particle size is, and the more irregular the composition of the soil particles are, the higher the safety factor of the slope is; the greater the slope is, the faster the safety factor decreases. When the slope is less than 1:0.75, the slope is relatively stable.
Algorithm for Vertical Bearing Capacity Calculation of Rock-Socketed Piles in Karst Area Based on Load Transfer Method
Authors: He Qinghua , Yu Zequan , Yue Weijie , Tan Weiyuan , Li Zhengkai
Published: April 2021

Due to the complex geological conditions and many influencing factors in karst areas, this paper conducted theoretical, experimental research and calculation analysis on the design and construction of engineering piles of bridge engineering in karst cave areas. An algorithm for vertical capacity calculation of rock-socketed piles in karst area based on load transfer method was developed. The results using this new method were analyzed and compared with the results from the static load test of three engineering piles in karst area, and the differences are relatively small. Through static load tests of pile foundation in karst area and study of the side resistance of rock-socketed pile in karst area, the friction resistance of rock-socketed pile and the effect of pile-end resistance, the bearing capacity characteristics of rock-socketed pile in karst area were obtained, achieving the load-sharing effect of cave roof in a rather scientific way. In view of the failure mechanism of the karst cave roof under the pile tip and the large proportion of lateral resistance of the rock-socketed pile, a calculation model for the stability of the karst cave roof under the combined action of the side resistance of the rock-socketed pile and the pile tip resistance is proposed.
Adaptive Infrastructure Management Technologies of the Oil and Gas Company, SONARA, of the Republic of Cameroon
Authors: Ondigui Messi E , Bikwe J J , Goureth M F , Chekushina T V
Published: April 2021

the purpose of my research is to put in place an adaptation technology to the Sonara company so that it can increase its production efficiency. SONARA is a processing type of enterprise for light type raw materials. However, heavy oil is currently being produced in Cameroon and there is a mismatch between the existing processing tool and the available crude oil. The enterprise is a semi-state company, most of whose shares are owned by the Republic of Cameroon, up to 80.29%: National Hydrocarbon Company, Stabilization Fund for Hydrocarbon Prices, National Investment Company and the Ministry of Finance. The state wants to increase the capacity of the refinery of finished petroleum products from 2.1 million to 3.5 million tons per year, and modernize all these infrastructures including its managerial system. the company aspires to live up to the expectations of the Cameroonian population and help the country which is advancing towards its emergence by 2035.The second phase of the modernization project, which has not yet begun, will consist primarily of the installation of a hydrocracking system to process heavy crude oil produced in Cameroon. The storage volume of SONARA is currently estimated at 132,500 m3.
Modeling the Lower Bound for a Marine Acoustic Waveguide with Elastic Bottom
Authors: Papkova Yu I , Papkov S O
Published: April 2021

At the present time, theory of sound propagation in a sea is based on the theory of non-ideal waveguides. In particular, plane-layered waveguide models are used as the basis for computer simulation of sound fields in inhomogeneous waveguides, where the unconsolidated sedimentary layer is of greatest interest. A characteristic feature of this layer is the presence of inhomogeneity in the physical properties and geometry of bottom, which cause local acoustic field perturbations. In the case when parameters of the waveguide are weakly dependent on distance, the use of plane-layered models proved to be fruitful. Such models are taking into account the geoacoustic properties of the bottom and the velocity profile of sound. The paper is devoted to the modelling lower bound of a waveguide with elastic bottom. It should be noted that solution for classical Pekeris waveguide contains branch line integrals, which to not allow us the method of particular domains to modelling waveguides with more complex structure of bottom. Thus we will consider a waveguide on a rigid basement, where sufficiently large elastic bottom layer with attenuation will adequately describe bottom properties. The solution for such waveguide does not presented in literature and may be a basis for modelling sound propagation in the waveguides with stepped elastic bottom.
Household Waste Recycling Technologies
Authors: Babaeva A A , Grigorieva E V
Published: April 2021

The paper touches upon the environmental issues of the modern civilization and the new technologies of waste recycling. The paper also dwells upon waste-free production where all the raw materials are transformed into products which is, at the same time, optimized in terms of process, economic, social and environmental criteria. There are also given the figures of increase of garbage volume in various countries including Russia. There are stated the most dangerous products of decomposition of plastic. In the article there are also considered the modern technologies of waste recycling which is the most prospective way to solve the issue of urban landfills. There are given the examples of recycling of combustible waste, rotting waste, medical waste and old cars without harming the environment.
Sapphire of the Naryn-Gol Creek Placer Deposit (Buryatia, Russia)
Authors: Aseeva A V , Kislov E V
Published: April 2021

A new occurrence of gem corundum was discovered in the vicinity of Naryn-Gol Creek, on the Dzhida volcanic field, Russia. Sapphires were found in both alluvial deposits of the Naryn-Gol Creek and pyroclastic rocks of the nearby Cenozoic alkali basalt volcano Barun-Hobol Pravyi. These rocks contain, in addition to sapphire, large crystals of garnet, spinel, augite, olivine, enstatite, ilmenite, and feldspar. Chemical composition of the sapphires overall is typical for corundum from basalt: rich in Fe, low in Ti and Cr. The oxygen isotopic compositions of corundum and associated minerals show δ18Osmow values ranging between 4.6‰ and 6.8‰ that is attributed to magmatic rocks. Study of impurities reveals the great role of volatiles, CO2, in particular, during the formation process.
The Influence of Time-Varying Stresses in the Rock Mass on the Stress State of Mine Workings
Authors: Sentyabov S V
Published: April 2021

The stress state of the concrete walling of mine shafts is formed as a function of the structural parameters of the shaft, the total stress tensor, which includes gravitational-tectonic and time-varying stresses acting in the rock mass at the baseline, taking into account the physical and mechanical properties of the rock mass, the elastic modulus of concrete, which depends on the rate of advance and additional stresses caused by a subsequent change in the stress field, determined outside the zone of influence of mining by a cyclic change in natural stresses, and in the zone of influence of the mined-out space - by a change in the secondary stress field. The paper has presented the results of the research, which significantly increase the degree of geomechanical study of the Gaiskoye deposit’s rock mass. The main purpose of the research was to determine the parameters of the initial stresses acting in the concrete walling of the shafts at different depths. The parameters of stresses acting in the shaft walling at deep mine horizons were determined under field conditions, and the stress-deformed state of the shaft walling at various horizons was monitored throughout the depth of the shaft in the period 2013 - 2020.
The Derivation of the Noise Level Dependences and Vibration Velocities of Elements and Units of the Drive System of the Rail Grinding Machines
Authors: Nazaretov A A , Yaitskov I A , Chukarin A N
Published: April 2021

The paper is devoted to the derivation of the noise level dependences and vibration velocities of elements and units of the drive system of the rail grinding machines. It should be noted that the vibro-acoustic characteristics of the drive system of rail grinding machines have not been studied enough. The negative impact on the operator of the increased vibration and noise levels is known as diseases caused by noise and vibration are the second and third in the list of occupational diseases. It should be highlighted that the safety in the operation of rail grinders largely depends on operator fatigue, which is actually determined by the influence of vibration and noise. Consequently, the problem of the vibro-acoustic safety of the rail grinding machines is relevant and has both technological and socio-economic significance. This article presents the results of theoretical studies of the processes of vibration excitation and generation of wheelset noise as one of the main causes of the increased noise in the general drive acoustic system of the rail grinders.
Ancient Aeolian Landscapes of the South of Western Siberia: Issues of Protection and Nature Management
Authors: Kurasova A O
Published: April 2021

One of the distinctive features of the West Siberian Plain is the wide distribution on its territory of cover sandy deposits, which act as parent rocks over a large area within the region for a wide range of climatic conditions. This feature of Western Siberia is due to geological and geomorphological conditions and the history of relief development in the Late Quaternary. Soils formed on sandy deposits play an important role in the sustainable functioning of the landscapes of the entire West Siberian region. This article discusses the issue of the protection of unique ancient aeolian landscapes on the example of the south of Western Siberia.
Plant Diseases Containment and Growth Stimulators of Fungal Origin
Authors: Pavlova N , Malygin D , Sokornova S
Published: April 2021

It is well known that mycopesticides have significant potential for a plant protection. For example, pathogenic fungi can induce nonspecific defence reactions and stimulate growth of non-host plants. The aim of this work is to evaluate the off-target activities of potential mycopesticides which affect germination, growth and development of crops. The strains of Stagonospora cirsii C-163, Calophoma complanata 32.121, Alternaria sonchi S-102, Beauveria caledonica BB16, BSc13Vg18, BSc25Vg18, Beauveria pseudobassiana BCu22, Beauveria bassiana T7, BHy1-06 were obtained from the pure cultures collection of the All-Russian Institute of Plant Protection. The most significant leaf spot containment (near 70%) was shown by mycelium extract S. cirsii C-163. In the case of leaf rust, the disease containment effect was lower and was observed for mycelium-based suspension of S. cirsii (near 35%). The maximum growth-promoting effect was observed for mycelium-based suspension of C. complanata. Multivariate analysis data showed that the species of B. caledonica and C. complanata are able to inhibit the development of wheat diseases and promote plant growth. Thus, in our opinion, the screening of producer strains should include the assessment of some nonspecific effects on the development and cultivation of plants.
Improving the Technology for Implementing a 3D Cadastre in Existing Accounting Information Systems
Authors: Hagba D V , Gura D A , Pyatashova O V , Pshidatok S K , Pavlyukova A P
Published: April 2021

In the Russian Federation, the issue of improving the cadastral system is currently more relevant than ever. This is determined by the complication of the procedure for designing and building the cadastral real estate objects. Modern architecture is becoming more complex and diverse year-by-year. The configuration of the construction facilities is becoming more increasingly complex, and these days, they can be built not only on the ground surface but also above or under the ground. In practice, such design solutions lead to uncertainty and ambiguity of their routine cadastral registration, and these objects are registered according to their two-dimensional projection on the ground. Currently, almost all design agencies use 3D simulation in solving issues related to the design, construction, and sale of both industrial or agricultural facilities and residential or office buildings and apartments. Leading Krasnodar enterprises engaged in the design of various real estate objects use three-dimensional models in providing customers with the complete scope of work. The paper authors reveal the basic concepts of a three-dimensional cadastre in a modern system of engineering, design, construction, and architecture. The prerequisites for switching to the 3D cadastre have been considered, the cadastral registration aspects specified, and the issues concerning three-dimensional representation and processing 3D real estate data discussed. The main 3D data representation models are listed.
The Results of the Wetted Area Estimation Under the Stationary Sprinkler Using a Digital Equipment
Authors: Zverkov M S
Published: April 2021

It is noted that the purpose of irrigation systems is to distribute water over the soil surface uniformly in the amount required by plants. The irrigation rate should be less than the soil infiltration rate, and the rain intensities for irrigation should not lead to direct physical damage grown crops to prevent soil problems (mainly erosion and loss of nutrients) and crops caused by runoff and flooding. It is necessary to research the size and shape of the area wetted by artificial rain, depending on the various operating modes of sprinklers and devices. This is especially important when creating irrigation equipment. It is also necessary to assess the distribution of water and determine various technological parameters of irrigation (intensity, rainfall depth, drop size distribution, etc.). The purpose of this research was to analyze wetted area under the stationary sprinkler using a digital equipment. The article describes using the digital equipment, the research design, the method of estimation of the wetted area by jet sprinkler. The device, installed under the sprinkler jet, works on the principle of an acoustic scanner and records the sound signal created by the impact of rain drops. The wetted area covered by rain jet was about 89.1 ± 16.5 square meters, the total irrigation area from one position is 927.5 ± 16.5 square meters. The effectively wetted pattern was less than the measured wetted pattern by 10…15 % approximately. It is shown that with the help of one device it is possible to measure the wetted area, the distribution of raindrops by size and rainfall depth.
The Analysis of Wave Effects on Offshore Objects
Authors: Dushko V
Published: April 2021

The article discusses the approach of analyzing external influences on a wide class of marine structures. An analysis algorithm using the CosmosFlovWork CAD is proposed, which allows both visually and numerically to estimate the size of the loads as a result of external influences. A semi-submersible platform is considered as an example.
Geochemical and Geotectonic Setting for Island Arc Related rocks on Um Taghir Area, Central Eastern Desert, Egypt
Authors: Awad H A , Nastavkin A V
Published: April 2021

Um Taghir area located in theCentral Eastern Desert of Egypt a long road of Safaga-Qena. Itis represented by island arc related rocks that are intruded by late to post tectonic magmatism. The island arc belonging to oceanic terrain, divided into metavolcaniclastic and metagabrroic rocks. Metavolcanoclastic sequence is represented as the older rock unit of the study area,it is noted that metavolcanoclastic intruded by metagabbro. Island arc assemblage is classified into schist and metagabbro that give clean different of their mineralconstituents according to petrographical studies.
Geochemically
, the investigated rock units and most of dikes have sub alkaline nature.
Tectonically
, metavolcanoclastic sequence is related to back arc basin basalts, while metagabbro related to volcanic arc.
Spatial and Temporal Dynamics Analysis of the Anionic Composition (Sulfates, Fluorides, Chlorides) of the Proletarskoye Reservoir
Authors: Vorobiev E V , Usova E V , Orkhova Yu V
Published: April 2021

This research’s goal is to study the features and find the patterns of changes in the concentration of chlorides, sulfates and fluorides over the past nine years and also along the longest part of the reservoir. Material and methods. During the research information on the history of the construction of the reservoir, its configuration and the sources used for desalination was used. Regular sampling data at three sampling points during 9 years was used for the research (in 2010-2018) these three sampling points are: one in the salty part of the reservoir and two in the desalinated part. Ion concentrations both annual and monthly average were used. Results. Chlorides, sulfates and fluorides dynamics was analyzed. It was discovered that the eastern part of the reservoir, which is river-fed and which is passing through salt marshes, is the main source of sulfates and chlorides while fluorides come from other sources. Conclusion. The conclusion about the spatial and temporal distribution of the anions also contains recommendations for a more detailed research of the salt composition of the Proletarskoye reservoir. It is also concluded that there is a particular influence of the anthropogenic factor on the development of sustainable ecosystems in such disturbed biogeocenosis as in an artificial reservoir.
System Analysis in Assessing the Ecological Safety of the Urban Environment
Authors: Safonova A G , Plugotarenko N K
Published: April 2021

This article discusses the issues of ensuring environmental safety in the territory of industrial cities. The structure of the system analysis of the ecological situation of the city is described. The urban environment is presented as a complex system consisting of the following subsystems - the state of atmospheric air, the state of surface and underground natural waters, the quality of drinking water, the state of the soil cover, noise and radiation conditions. These subsystems are considered by the authors as separate systems that include elements of a lower level. The factors influencing the state of these elements are formed, their mutual connection is tracked. Based on the results of the system analysis, the authors proposed a logical-probabilistic model of the environmental safety of an industrial city, the practical implementation of which will contribute to the sustainable development of the urban ecosystem.
Reproductive Qualities of Broiler Breeders When Using Various Technological Equipment
Authors: Khaustov V N , Piliukshina E V , Rusanova V V , Popelyaev A S , Getmanets V N
Published: April 2021

Nowadays, poultry farms use various technological equipment for keeping and caring for poultry. This also applies to the feeding system. The studies were carried out in the conditions of Kamenskaya Poultry Farm LLC, Altai Territory, on the parent flock of the Ross 308 cross. For the experiment, two experimental groups of birds at the age of 23 weeks, 8355 heads each, were formed from the parent flock. The first group of chickens was fed from traditional, stationary trough feeders. In the second group, a new design of feeders was used -oval in shape, which automatically rose to the ceiling after feeding the birds. In this position, they are filled for the next bird feeding. It was found that the yield of broilers per the initial hen of the parent flock differs between the control and experimental groups (in favor of the experimental group) in all control periods. At the same time, the greatest differences were noted starting from the age of 47 weeks - 3.2%, at 52 weeks - 4.1%, at 57 weeks - 4.8%, and at 62 weeks - 4.1%.
Methodology of Formation of the Attribute Structure of the Natural-Technical System
Authors: Istomin E , Sokolov A , Prisyazhnyuk S , Petrov Y
Published: April 2021

Based on the system analysis of the development and implementation of the geoinformation approach to managing the development of systems, the article presents the scientific and methodological foundations of the target ontology of the geoinformational space of control and proposes a method for determining the optimal compromise weight coefficients expressing a generalized expert opinion.
Research of Structure of Elastic Self-Adhesive Radiation Shielding Coatings
Authors: Buzover M E , Shcherbak Yu P , Cherkasov V D , Yurkin Yu V , Avdonin V V , Suntsov D L , Pilshchikov V O
Published: April 2021

An algorithm for studying the structure of radiation shielding materials using the atomic force microscopy (AFM) method has been developed and described. Using the proposed method, the structure of tungsten-containing radiation shielding materials was studied and the difference in the microstructure of the samples and the nature of the distribution of the filler were revealed.
Application of Drilling Oscillator During Drilling Directional Wells in the Field Conditions of Gubkinskoye Oil and Gas Field While Drilling No. 2156
Authors: Shiyan S I , Shutov D V , Yu Fesenko M , Shabliy I I
Published: April 2021

The article describes the use of drilling oscillator when drilling directional wells in the field conditions of the Gubkinskoye oil and gas field while drilling No. 2156.
Drill Cuttings Control System in Oil and Gas Companies
Authors: Arutyunyan A S , Petrushin E O , Kusov G V , Kusova L G
Published: April 2021

The problem of ensuring environmental safety in the handling of drilling waste oil production is relevant throughout the world, but is particularly acute in Russia in almost every oil-producing region. The importance of the problem is determined not only by a significant amount, but also by the negative impact of oil waste on virtually all components of the natural environment. As a result of their impact, there is a significant change in the natural state of the geoecological environment, a decrease in the natural protection of groundwater, activation of geochemical and geomechanical processes, and a change in the natural microbiocenosis. The threatening growth of hazardous oil waste accumulated annually in the absence of the necessary scale of their utilization leads to the seizure of land resources for long periods. At the same time, oil waste belongs to the secondary material resources and by its chemical composition and useful properties can be used in the national economy instead of primary raw materials