bluuebunny/crossref_metadata_2025_split huggingface dataset:
Monitoring of Irrigation Area in Chuanhang Irrigation Area Based on MODIS Daily Surface Temperature Range
Authors: Rui Wang , Yuanyuan Duan , Mengyi Li , Rongjie Gui , Jun Liu , Min Chen , Long Song Wen 
Published: June 2021

Abstract
Monitoring and analysis of irrigated area is of great significance to evaluate irrigation benefit, agricultural drought situation and regional water resources utilization. This article selects MODIS surface temperature products from 2016 to 2020. Using the method of daily difference in surface temperature, eliminating the influence of precipitation, realizing remote sensing monitoring of irrigation intensity and spatial distribution of irrigation area. The results showed that the average number of irrigation times in five years was in the range of 6-8. Due to factors such as rainfall during the irrigation period, the overall irrigation frequency from 2016 to 2018 is less than the overall irrigation frequency in 2019 and 2020. On June 11, 2018, remote sensing images detected irrigation areas of Buzi Town, Longhe Town, Yangbei Town and Chenji Town, which were consistent with the data of irrigation areas.
Monitoring Islands and Reefs Area Based on Satellite Remote Sensing Image
Authors: Yu Zhen 
Published: June 2021

Abstract
The distribution of islands and reefs is wide, and the field survey cost is high and difficult. After the identification of islands and reefs, how to carry out effective monitoring is also a problem. By comparing three remote sensing monitoring methods, this paper analyzes the advantages of satellite remote sensing image to obtain islands and reefs area monitoring methods, and puts forward three methods based on satellite remote sensing to monitor islands and reefs area, so as to provide reference for islands and reefs area monitoring.
Building Semantic Information Extraction Based on Full Convolution Neural Network and Parameter Transfer
Authors: Zhang Yue , Liu Congna , Tang Ruipeng 
Published: June 2021

Abstract
Aiming at the problem that the generalization ability of deep convolution neural network model is limited, this paper extracted the semantic information of buildings in different regions by combining the transfer learning method. Taking the Massachusetts aerial image building data set as an example, the layer depth structure of Segnet network model is improved, and a new model is trained by migrating the parameters of the improved model and combining with a small number of Guilin building image data samples. The extraction results were analyzed and compared. The results show that, by transferring the parameters of the trained model, the Kappa coefficient and F1 score of buildings in Guilin area reached about 0.8.
Inter-monthly regional variation of sea surface salinity and influencing factors in the East China Sea and the adjacent Northwest Pacific Ocean
Authors: Lu Yan , Kang Jiancheng , Meng Xiangchun 
Published: June 2021

Abstract
Based on 1871-2010 monthly sea surface salinity (SSS) and flow field data, and the global seabed topography data, the inter-monthly regional variation of SSS in different regions and their influencing factors are discussed after climate zoning in the East China Sea (ECS) and the adjacent Northwest Pacific Ocean (ANPO). Rresults show that: (1) the study area can be divided into the area of the ECS, the Kuroshio area of the East China Sea (KECS) and the ANPO I area, II area and III area. (2) In the continental shelf area of the ECS, the inter-monthly regional variation of SSS is significant, the inter-monthly variation range of feature points is large and the difference of SSS value at each point is great. (3) In the KECS, the inter-monthly regional variation of SSS is small. The SSS at feature points is high and the inter-monthly variation is small. From the inlet to the outlett of the KECS, the SSS value gradually increases. (4) In the ANPO, the inter-monthly regional variation of SSS is the smallest, the SSS at feature points is high, and their inter-monthly variation is small. The SSS increases with increasing longitude at the same latitude, and decreases with increasing latitude at the same longitude.
Numerical Simulation Analysis of Seismic Fragility of Vertical Floating-roof Storage Tanks
Authors: Wang Mengzhu , Sun Zongguang , Sun Jiangang , Cui Lifu 
Published: June 2021

Abstract
To study seismic response of tank, 10 × 104m3 vertical floating-roof tank model is established. The probability relationship between the intensity measure and engineering demand parameters is established based on extensive nonlinear dynamic time-history analysis. Four failure modes of tank were determined, and seismic fragility curve of under each failure mode was obtained. The results show that under frequent earthquake, the exceeding probability of circumferential tensile damage, and instability of tank wall in intact state were 40% and uplift of the bottom sheet was 75%. Under design-based earthquake and rare earthquake, circumferential tensile damage was in intact state, and the exceeding probability of instability were 66.9% in medium damage and 52.9% in severe damage. The exceeding probability of bottom uplift in severe damage is 90%. The method takes the randomness of ground motion into account, which can provide an effective idea for the evaluation of the seismic safety of tank structure.
Research on the Application of Green Building in Building Design
Authors: Zheng Leilei 
Published: June 2021

Abstract
Green building has an important impact on building design, so it should be emphasized. The application of green building design concept to housing design can better improve the design effect. But the use of green building design concept need to follow certain principles, in order to better serve the construction industry. According to the related concepts in the development of green building design, and combined with practice, this paper briefly analyzes the application of green building concept in housing design. It provides some reference for the development of construction industry.
Research on the Temporal and Spatial Changes Characteristics of the Drought of Natural Vegetation in the Yangtze River Source Area Based on CWSI
Authors: Dai Xitong , Yao Liqiang , Yuan Zhe , Sun Keke 
Published: June 2021

Abstract
Under the combined effect of global climate change and local regional environmental change, drought has developed into a natural disaster with high incidence on the earth. As the Yangtze River is the mother river of Chinese civilization, the drought phenomenon in the source area in recent decades has seriously affected and restricted the development of local agriculture and economic society. With the long-term practice of remote sensing technology, researchers have improved drought monitoring methods, including crop water stress index. Crop water stress index (CWSI) is widely used in agricultural drought research based on the principle of heat balance. In this paper, the spatial and temporal characteristics of drought in the Yangtze River source area and its influencing factors were analyzed by using crop drought index method. The CWSI value of the source area of the Yangtze River featured a slightly downward trend from 2001 to 2018. With a strong spatial heterogeneity in distribution, it gradually decreases from west to east. The severest drought occurs in summer and autumn, and the regions that are mostly influenced by temperature are mainly in southwest part and the ones mostly influenced by precipitation are mainly in east part. By analyzing the temporal and spatial distribution characteristics of drought and the correlation of meteorological factors, this paper provides an effective basis for drought prevention and control in the Yangtze River source area, and then promotes the accelerated development of agriculture and economic society in the Yangtze River source area of our country.
Overview of the III International Conference “MIP -III-2021: Modernization, Innovations and Progress”
Authors: Kovalev Igor V , Testoyedov Nikolay A , Voroshilova Anna A 
Published: June 2021

Abstract
The overview describes the main directions and results of the III International Conference MIP-III-2021 held in Krasnoyarsk in April 29-30, 2021. It gives the details about the participants and the proceedings.
Comparison of characteristics of St3 in a free and annealed state
Authors: Nasibullina O A , Yu Pechenkina M 
Published: June 2021

Abstract
For the manufacture of field pipelines, low-carbon steel grade St3 is often used. It welds well, almost never hardens, and therefore is very convenient for working in structural elements. Studies of samples from this steel grade were carried out for the initial and heat-treated state by the following methods: study of mechanical properties (tensile test, hardness test); microstructural analysis. At the beginning of research, annealing was carried out in the work to obtain an equilibrium structure. According to the results of the experiment, it was noted that after annealing, the steel structure acquired low strength and hardness with high plasticity. After annealing, tensile tests were carried out on steel samples. Tensile tests of the metal were carried out in order to determine the main indicators of mechanical properties and to compare these properties in the initial and heat-treated state. Hardness measurements were carried out according to the Rockwell method. The microstructure of steel samples was studied using an optical microscope “Metam RV-21-1”, which made it possible to study the microstructure at a magnification of 200 times. It is shown that the structure of steel is ferritic-pearlite. In the initial state, there is a segregation banding and segregation streamer. The structure of the steel under study in the initial state is fine-grained. After annealing, it becomes more homogeneous, and the deformation texture disappears.
Protective structures on carbon steel in aqueous-salt solutions containing catholyte
Authors: Yu Pechenkina M , Nasibullina O A 
Published: June 2021

Abstract
The process fluid of oil fields, with a huge amount of dissolved gases, mechanical impurities, salt ions, mineral acids and bases present in them, has a destructive effect on the internal surface of oil collection equipment. The simultaneous presence of carbon dioxide and hydrogen sulfide pose the greatest danger, since they are catalysts for the cathode reaction of hydrogen depolarization of low-alloy steel, and lead to the formation of soluble corrosion products - iron hydrogencarbonate. One common way to prevent electrochemical corrosion of oil equipment is to neutralize acidic components of process media. Sodium hydroxide is often used as a neutralizer, however, the content of sodium salts contaminates the obtained oil products and catalysts and leads to disruption of the technological process of its further processing. Accordingly, there is provided a process for the non-reactive neutralization of acidic components by introducing a solution of a hydroxide-saturated catholyte. In the scientific and technical literature, the problem of forming protective films on the surface of carbon steel by introducing catholyte into the process liquid remains insufficiently studied. In scientific research work, a method of forming surface structures by selecting the concentration of a catholyte solution has been developed. The thickness of the obtained protective structures obtained in the model of produced water formed on the surface of low-alloy steel A516-55 in solutions of sodium hydroxide and catholyte was calculated. The study revealed the dependence of the corrosion rate of steel on the concentration of sodium hydroxide solution and catholyte solution at various pH values.
Research and optimization of the hydraulic performance of bench lines for testing of low thrust spacecraft engines
Authors: Nazarov V P , Zuev A A , Zhuikov D A , Tolstopyatov M I 
Published: June 2021

Abstract
Low thrust engines perform important functional tasks in control systems of motion, orientation and stabilization of spacecraft on various paths and space orbits. They are subject to high-reliability and long operating time in pulsed modes with a large number of starts. Bench tests of the engines are a special part of the program development of low thrust engines with high reliability and efficiency. The article analyses wave processes in hydraulic lines of test benches, which prevent obtaining reliable parameters and performances of engines during tests. Authors show that the exclusion of oscillation processes in test bench systems is the main condition for the organization and planning of tests. Similarity conditions for bench hydraulic lines of spacecraft propulsion systems are developed. A methodology for estimating the frequency responses of the bench lines during pulsed test modes is presented. Mathematical functions of geometric parameters of the bench hydraulic lines on the pulse responses of low thrust engines are obtained, allowing optimization of the bench propellant feeding system to avoid resonance oscillation processes. Research results provide reliable estimates of the parameters and reliability of low thrust engines.
Improvement of the processes of forming tight shells of double curvature
Authors: Markovtsev V A , Karpukhin E G , Mikheev V A , Alvarenga Roberto de , Yu Kosolapova A 
Published: June 2021

Abstract
The article analyzes the process of shaping double curvature shells made of aluminum sheet material used for covering the outer contour of an aircraft. The main rejection signs of casings made by the method of shaping by wrapping are considered. The main problems arising during the shaping of double-curvature shells by wrapping are presented, and the ways of their solution are considered and proposed.
Artificial intelligence for imaging data analysis in materials science: microscopy and behind
Authors: Okunev A G , Yu Mashukov M , Sankova N N , Nartova A V , Matveev A V 
Published: June 2021

Abstract
In various fields of microscopy, a fairly common task is to count and determine the size of the studied objects. Sometimes this is a one-time tedious task that is done by lab personnel without the programming skills. In this paper, we present an approach that allows researchers to perform automated processing of research imaging data using our services and even to train deep neural networks on their own in no code mode.
Torsion of a thin-walled structure of a waveguide with rectangular cross-section
Authors: Kudryavtsev I V , Brungardt M V , Goncharova E A , Li O A , Troshin S I 
Published: June 2021

Abstract
The paper has considered the problem of determining the stress state of thin-walled waveguide structures during torsion. An analytical solution using the Bredt’s formula has been considered and its comparison with a numerical solution using the finite element method has been performed. The numerical solution has been carried out using a created volume model, and the load has been modeled as a set of concentrated forces distributed over the entire cross-section of the waveguide. It has allowed us to reduce the local effects in the form of complex stress state and increase the accuracy of the results. Comparison of the results has shown that the stresses calculated by the finite element method are always higher than those obtained by the Bredt’s formula and it is necessary to take into account their maximum values. The deformation evaluation also has shown that the FEM calculations give larger twist angles than those obtained by the Bredt’s formula for all the considered section sizes.
Effect of titanium and chromium diffusion coatings on corrosion resistance of sintered iron
Authors: Sokolov E G 
Published: June 2021

Abstract
The authors have studied the effect of titanium and chromium diffusion coatings on corrosion resistance of sintered iron in solutions of acids and salts. The samples of 85% density were obtained from powdered iron by static pressing in press dies and sintering in vacuum. The diffusion coatings were applied in molten lead with titanium and chromium additives at the temperature of 1100°C and 2 hours exposure time. Microstructure of the samples was then explored by the optical metallography method. The content of elements in the coatings was measured using energy dispersive X-ray microanalysis. Studies of corrosion resistance of the samples in solutions of acids and salts were conducted by the gravimetric method. Corrosion resistance was also evaluated by time to the first corrosion foci emerging and the area of corrosion damage. Diffusion titanium and chromium coatings have ensured higher corrosion resistance of sintered iron in all the aggressive media studied. Chromizing is the most efficient for protecting sintered iron in solutions of sulphuric and nitric acids, as well as in media containing acetic acid and hydrogen peroxide. Meanwhile, titanizing is the most efficient for protecting sintered iron in sea water.
Effect of microalloying on the stability of the endurance characteristics of hot-deformed powder steels
Authors: Dorofeyev V Y , Sviridova A N , Berezhnoy Y M , Bessarabov E N , Sviridova S V , Kochkarova K S , Derlugyan I D 
Published: June 2021

Abstract
The stability of the characteristics of the contact and low-cycle fatigue life of steels obtained from iron powders with different contents of alloying and microalloying elements, as well as impurities, has been studied. The carbon content in powder steels was varied. It has been established that doping Na or Ca microadditives contributes to an increase in the stability and absolute value of the parameters of the contact and low-cycle fatigue life of hot-deformed powder steels due to the activation of cohesive interaction on interparticle surfaces and carbon diffusion, which contributes to the formation of a homogeneous structure. Doping microadditives of Al contributes to an increase in the contact and low-cycle fatigue life of the powder steels in comparison with the samples-witnesses. However, the formation of zones of structural heterogeneity in steels containing more than 0.4 wt. % C, causes a decrease in the stability of these characteristics.
Influence of full-scale climatic tests on the properties of aluminum alloys in zones of river and marine water mixture
Authors: Bulysheva N I , Varchenko E A , Nazarenko A V , Yu Glushchenko G , Goncharov A A , Gladkikh A V 
Published: June 2021

Abstract
Within nine months, comprehensive studies were conducted on the effect of full-scale climatic tests on the properties of samples of aluminum alloy AMg6 when fully submerged in the estuary region of the Don River (the basin of the Sea of Azov) at two stations. The features of the formation of micro- and macro-fouling communities on experimental plates at one, three, six and nine months after the start of the experiment are shown. It is shown that microfouling communities on the experimental plates begin to form within a month of exposure. Diatoms were the background-forming species during the entire practical period of the study. Single macrozoobenthos organisms begin to appear on the samples after three months and only at second station. After six months, macro-fouling organisms are fixed on plates at both stations. As the exposure period increases, the number and biomass of macro-foulers increases. The corrosion resistance assessment of the samples revealed the absence of intercrystalline corrosion during the entire test period in water, at both stations, as well as pitting corrosion during the first six months of exposure.
Forecasting and operational assessment of the quality of repaired units
Authors: Apazhev A K , Shekikhachev Y A , Hazhmetov L M , Shekikhacheva L Z 
Published: June 2021

Abstract
Evaluation alone is not enough to improve product quality. It is necessary to have not only the estimated indicator itself, but also to declare the factors that influence the formation of quality and to investigate this influence. Only then does it become possible to carry out quality management. To study the quality of repaired products, we use the economic and statistical method, which is as follows. Product quality is considered in two aspects: production and consumer. Manufacturing quality is a set of product properties (physical, chemical, physical and mechanical, etc.) obtained by it in the process of manufacturing or repair. The consumer quality of products manifests itself in the process of consumption (operation) and is determined by the cumulative impact of all characteristics of production quality and conditions of consumption. With the help of the correlation level, two main tasks can be solved: operational quality assessment at the stage of production (repair), based on predicting the consumer quality of the projection according to the known values of its production quality indicators; management of the production quality of products in accordance with a given level of its consumer quality. The most characteristic indicators of the production quality of the repaired units are the errors in the dimensions of the shape of parts, the relative position of their surfaces, the size of the washed out links of the dimensional chains of mechanisms, the physical and mechanical properties of materials, etc. At the repair enterprise, by means of appropriate measurements, the values of the indicators of the production quality of batches of products are determined. Then, in operation, these products are monitored in order to determine their consumer quality. The consumer quality of repaired products can be expressed by a number of indicators, but the most expedient is the use of such an indicator as winding to the first failure caused by aging processes (wear, fatigue failure, etc.). Considering the above, research aimed at predicting and quickly assessing the quality of repaired units is an urgent problem.
Semi-automatic welding in the environment of protective gases of welded structures from hardening steels with regulation of thermal cycles
Authors: Zharinova N V , Vakulenko M V 
Published: June 2021

Abstract
In order to increase the technological and operational strength of welded joints of type X12CrMo5 steels in the process of welding in a protective gas environment, it is possible to use vibration deformation treatment of a welded joint with a pearlite joint to form a metal structure of a welded joint with minimal sensitivity to the formation of cold cracks due to an increase in the rate of heating and cooling, reduction of residence duration and provision of conditions of high-temperature decay of austenitic metal structures in seam and near-seam zones above critical temperatures. The work carried out research on the process of semi-automatic welding in the medium of protective gases in the mixture of carbon dioxide and argon with pearlite and austenitic welding materials of welded structures from hardening steels of grades 12Kh2M1 and X12CrMo5 with regulation of thermal cycles (RTC) due to the use of vibration deformation treatment and accompanying forced cooling.