bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on Vibration Response of Surrounding Environment Caused by High-Speed Train Operation
Authors: Yang Ruiyao , Xia Zhifan , Xu Bin , Liu Yue , Zeng Lingyun , Chen Ziyue 
Published: April 2021

Abstract
A finite element calculation model is established on basis of a ballastless high-speed railway passing through a section of Nanchang to study the propagation law of high-speed railway vibration in soil and the influence of hollow trench isolation on soil vibration. The three-dimensional finite element model for calculating the vibration response of high-speed railway and the two-dimensional finite element model for vibration isolation of high-speed railway are established. It is concluded that, as the train speed increases, the displacement, speed and acceleration of the soil increase, and the vibration period shortens; as the distance from the vibration source increases, the surface displacement, velocity, and acceleration of the soil f shows a trend of increasing first, then decreasing, and then increasing fluctuations along the roadbed-soil propagation path. The horizontal vibration response of the soil is greater than the vertical vibration response. And within a certain range, And in a certain range, the empty groove farther from the centerline of the track, the better the vibration isolation effect. When the train speed is 350 km/h, the distance from the vibration source should be 16 ∼ 22 m, and the vibration isolation effect is better.
In-situ Fabrication of ZnIn2S4/In2O3 Composites Based on MOFs-Derived In2O3 for Efficient Photodegradation of Methyl Blue
Authors: Li Jingzhe , Li Ping , Duo Shuwang 
Published: April 2021

Abstract
ZnIn2S4/In2O3 composites were prepared by the oil-bath method at a low temperature using metal-organic frameworks (MOFs) as the precursor. The as-synthesized specimens were characterized by the comprehensive utilization of XRD, SEM, UV-vis DRS, and BET. Characterization results proved the composites consisted of In2O3 with micro-columnar structures and ZnIn2S4 nanosheets, the visible-light absorption range and the BET surface area of the composites were larger than the pure In2O3. Besides, the effect of ZnIn2S4 on ZnIn2S4/In2O3 composites was analyzed in detail, the results show ZnIn2S4/In2O3 composites exhibited improved visible-light photocatalytic activities for the degradation of methyl blue (MB), among them, ZnIn2S4/In2O3-1:1 exhibited the highest photocatalytic activity of 75.5%. The improvement of photocatalytic performance could be attributed to the enhanced visible-light absorption range and BET surface area, which improved the visible-light utilization rate and provided more reactive sites for photocatalytic reaction.
Study on Tensile-Shear and Compressive-Shear Coupling Strength of Saturated Clay
Authors: Kong Xiaoang , Cheng Yongfeng , Zhao Binbin , Liu Yi , Yang Zhi 
Published: April 2021

AbstractTraditional soil strength research mainly focused on compressive shear or uniaxial tensile stress state, and rarely considered the tensile-shear coupling strength characteristics in soil. Based on the tensile-shear and compressive-shear coupling strength model established earlier, which consider the tensile-shear coupling strength comprehensively, relevant tests are carried out to verify the strength model. Different types of saturated clay are selected for the uniaxial tensile test, direct shear test and triaxial shear test. The strength model is verified based on experimental data and compared with the existing joint strength model, and the coupling strength model shows good applicability and accuracy. The result shows the strength model can accurately describe the nonlinear strength characteristics of soil under tensile-shear coupling stress.
Application of UAV Oblique Photogrammetry in Mine Ecological Environment Restoration
Authors: Deng Jun 
Published: April 2021

Abstract
At present, total station or gnss-rtk is often used in mine ecological environment restoration survey, which has the disadvantages of high intensity, long cycle and high cost. In particular, the problems of landslide and collapse in abandoned mines bring potential safety hazards to the surveying and mapping personnel. The traditional surveying and mapping results are 2D graphics, and the information of topography and geological disasters is not intuitive, which brings inconvenience to the design of ecological environment restoration scheme. In order to meet the actual needs of mine ecological restoration, UAV incline photogrammetry technology is applied in the survey and mapping, scheme design and construction management stages of mine ecological environment restoration. The research results show that UAV incline photogrammetry technology can realize: ensure the safety of technical personnel, make the survey and mapping more efficient; make the mine environment information more intuitive, vivid and vivid, which is conducive to the formulation of ecological restoration plan, dynamic grasp of construction progress, and make mine ecological restoration more accurate.
The Establishment of Engineering Coordinate System and Its Coordinate Transformation by Changing the Geometric Parameters of Ellipsoid
Authors: Wu Yunen , Qian Xuefei 
Published: April 2021

Abstract
We often encounter the problem of mutual transformation between the various coordinate expression in the work. because the engineering ellipsoid is only for the country long ellipsoid half shaft made of change, and the two centre, flattening the same, so their space rectangular coordinate system of the three axis also overlap, namely national ellipsoid space rectangular coordinate with engineering ellipsoid space rectangular coordinate exactly equal. Based on this, this paper introduces some key factors that need to be considered in establishing engineering coordinate system by changing the geometric parameters of ellipsoid. The idea of transforming engineering coordinates, national coordinates and urban coordinates based on different ellipsoid parameters is put forward. It provides useful reference for the practice of surveying and mapping engineering.
Research on the Effect of Urease on the Energy Absorption in Shanghai Clay by Unconfined Compressive Test
Authors: Qu Jili , Xiong Kun 
Published: April 2021

Abstract
Urease was attempted to improve the quality of soil as a novel material rising in recent years. The unconfined compressive tests (UCT) have been carried out on soils mixed with urease at a series of concentration. The unconfined compressive strength (UCS), energy absorption (Ei), cumulative energy absorption (Ei
total) of 4 types of samples was also analyzed to evaluate the effect of reinforcement. Results from tests show that a certain concentration of urease has a positive effect on UCS and Ei of the clay, and it appeared best with the concentration of 3g/L. Urease of 4g/L achieved the maximum value in energy absorption within certain strain range. Conclusion is differed for Ei
total as the values of samples mixed with urease are all decreased compared to control sample. It is important for civil engineers to understand the stabilizing mechanism of urease for design and construction of civil engineering project.
The Application Research of GM (1,1) Model with X (1) (n) as Initial Value in Deformation Prediction Combined with Accumulation and Logarithm Transformation
Authors: Qiu Lijun , Zhang Bo , Zhou Zhanxue 
Published: April 2021

Abstract
Mining can easily lead to subsidence. If the subsidence is serious, the ecological environment will break down, and even worse, bring dangers to human. Therefore, the prediction of mining subsidence is of great significance for assessing possible dangers and ecological restoration at a later stage. In order to overcome the theoretical defects in the traditional GM(1,1) model and deal with the low prediction accuracy of deformation data due to fluctuation and oscillation, the original data sequence is accumulated and the logarithmic transformation is performed after adding constant to the accumulated sequence. Then according to the transformed sequence the GM (1,1) model with X(1)(n) as the initial value is established to make fitting and prediction. At last, based on the measured deformation data,we can not only obtain a satisfactory results for monotone concave sequence, but also improve the prediction accuracy of the fluctuation data by combining with the accumulation operation. So the results of the example meet the requirements of prediction accuracy. The example shows that the method has practical value in engineering.
Numerical Simulation Study on Rock Breaking Efficiency of Shield Cutters in Large-Size Boulder Strata
Authors: Cheng Jinguo , Jiang Hua , Qu Xingtong , Jiang Yusheng , Li Changhao 
Published: April 2021

Abstract
Tearing cutters are generally applied to break rocks when shield tunnelling in the strata with large size boulders. To improve rock breaking efficiency, the processes of tearing cutter impacting rock model are simulated, and the effects of cutter mass, impact velocity and spacings on specific energy of rock breaking are studied. The results indicate that the impact energy rises significantly by increasing the cutter mass or impact velocity. With the increase of cutter mass or impact velocity, the specific energy decreases rapidly at first and then increases slowly. The rock breaking efficiency increases firstly and then decreases, and the specific energy has a minimum value. Under the same impact energy, the rock breaking effect by changing the cutter mass is better than changing impact velocity. When cutter spacing increases, the specific energy decreases gradually and then increases. Once the cutter spacing is optimized, the specific energy of rock breaking is the minimum and the rock breaking efficiency is the highest. The research results can provide reference for the cutter design and layout in the similar strata.
Experimental Study on Creep Characteristics of Saturated Sandy Soil with Different Fines Content
Authors: Su Jintao , Wang Shijie 
Published: April 2021

Abstract
In order to better study and predict the post-construction settlement of sand with fine-grained blow-filled sand, sand samples with different fine-grained contents were prepared according to the actual engineering geological conditions, and one-dimensional creep tests were carried out to reveal the effect of fine-grained content on the creep characteristics of saturated sand. The results show that the creep curve of saturated sand has nonlinear characteristics and is basically divided into three stages: instantaneous deformation, rapid deformation and steady-state creep; When the content of fine grain is less than 25%, the strain is smaller than that of sand without fine grain, and the average strain is minimum when the content of fine grain is between 15%∼25%; When the content of fine grain is more than 25%, the strain of sand under the same load increases with the increase of fine grain content; The 5-element generalized Kelvin model can describe the creep characteristics of saturated sand with different fine grain content, the correlation coefficient of fitting curve is 0.964∼0.997, the creep parameters in the model are related to normal stress, and all the parameters increase with the increase of normal stress.
Application of Technology of UAV-Mounted Ground Penetrating Radar in the Study of the Thickness of Soil Plow Layer
Authors: Hou Jianshan , Yan Youqian , Cong Peitong 
Published: April 2021

Abstract
When the detection field is a large field, the traditional ground penetrating radar system has the problems of low detection efficiency and high labor cost. Aiming at this problem, an integrated system of UAV-mounted ground penetrating radar is designed, and a detection method based on UAV-mounted ground penetrating radar is proposed. Taking a small area of cultivated land in Taiyuan, Shanxi as an example, the detection method of UAV-mounted ground penetrating radar is applied to measure the thickness of soil cultivated layer. After the collected data is extracted and linearly interpolated, the thickness of the cultivated soil layer obtained by image analysis is similar to the measured thickness of the soil cultivated layer, which highlights the advantages of high efficiency and low cost based on the detection method of UAV-mounted ground penetrating radar , making the detection of concealed loose bodies in large sites becomes possible.
Evaluation Method of Development Degree Based on Feature of an Intensity Dissolution Layer
Authors: Tang Hegang , Liu Yukang , He Yinding , Cao Xianfa 
Published: April 2021

Abstract
It is common to cause errors in the selection of building foundation in karst terrain. The root reason is that the practical difficulty of karst treatment in foundation cannot be reasonably reflected by the existing evaluation of karst degree. Taking New Terminal of Nanning Wuxu International Airport as an engineering case, this article analyzes the limitation of the existing evaluation indices of karst degree, demonstrates the advanced rationality of intensity dissolution layer’s thickness as the evaluation index of karst degree, and proposes the recommended standard of the evaluation of karst degree. Results show that the intensity dissolution layer, divided by dissolution ratio distribution curve with depth in foundations, comprehensively considers the main depth range of dissolution degree of rock surface and the developing of cavern dissolution, and its distribution characteristics can reflect the most complex depth range of karst foundation. As the evaluation index of karst degree, it is reasonable. Its recommended values are suggested as follows, When the thickness of an intensity dissolution layer is less than 3.0 m, more than or equal to 3.0 m and less than 6.0 m and more than or equal to 6.0 m, the karst degree can be determined as weak development degree, medium development degree and strong development degree.
Influence of Lateral Limited Uniaxial Tensile Strain on Opening Sizes
Authors: Zhao Wenfang , Tang Xiaowu , Li Keyi , Liang Jiaxin , Lin Weikang 
Published: April 2021

Abstract
Nonwoven geotextiles are widely used for seepage prevention, foundation improvement and reinforcement materials. They are usually under lateral limited uniaxial tension in engineering, which results in changing behaviour of the opening size of geotextiles. According to theoretical analysis of pore parameters people studied before, the equivalent pore size

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of nonwoven geotextiles under the lateral limited uniaxial tensile strain are derived in this paper. Two different nonwoven geotextiles were stretched under lateral limited uniaxial tensile strain of 3%, 5% and10% respectively. Dry sieving tests were exerted in order to eliminated electrostatic effects and measure the change of pore size of nonwoven geotextiles. The results show that theoretical solutions are good for predicting the change law of pore sizes for non-woven geotextiles. Pore size of nonwoven geotextiles increases with increasing of the lateral limited uniaxial tensile strain.
Dynamic Behavior Analysis of Hose Operation in Deep-Sea Lift Mine
Authors: Deng Xuhui , Meng Liuyang , Ding Liang 
Published: April 2021

Abstract
Based on the simulation test system of deep-sea mining hose transportation, the variation characteristics of the hose stress, strain and dynamic frequency are analyzed when the collector is in different positions under the condition of a certain hose length. It provides a reference for the design of hose in deep-sea mining system. The results show that the safety of the single arch structure is better than that of the Double Arch structure, the vibration displacement and stress of the hose increase with the increase of the working range of the dust collector, and the optimum working range of the dust collector is 30-60 m.
Qualitative Characteristics of Mutton Obtained from Animals with Different Bioenergy Profile
Authors: Samusenko L D , Mamaev A V , Konovalov K V 
Published: April 2021

Abstract
Food security is one of the components of the stable economic development. Its main criteria are: availability and safety of raw materials and products of its processing for the population. Ensuring food security in Russia is possible only on the basis of innovative development of the agro-industrial complex and introduction of new methods based on the knowledge of physiology of productive animals into practice. In this regard, a promising direction is a study of product quality assessment using a bioelectric profile of superficially localized biologically active centers on the skin of sheep. Determination of meat qualities was carried out on young sheep at the age of 6-7 months old. Topographic search and measurement of the bioelectric potential level of SLBAC was carried out with an ELAP device. As a result of the studies, it was found out that at values of the bioelectric potential level of SLBAC from 58.2 μA and higher, the quality indicators of meat content are high. The correlation dependence threshold of the bioelectric potential level of SLBAC and the meat content is from +0.12 to 1.0. The bioelectric profile level of SLBAC can serve as a test for a live-animal assessment of the qualitative composition of mutton, with sufficient information content and meat producibility assessment.
Environmental Aspects of the Use of Construction Materials from Thin-Sheet Galvanized Steel in the Far Eastern Federal District
Authors: Pasichnikov V E , Mayorova L P 
Published: April 2021

Abstract
The main environmental benefits for the selection of the thin-sheet galvanized steel in the production of construction materials that meet the requirements of sustainable construction are reasoned. The analysis of the material life cycle is presented. The advantages of products from the thin-sheet galvanized steel in comparison with alternative materials of similar purpose are described as well. The comparative analysis presents the regional aspect of the use of construction materials.
Using the Main Hydrophysical Characteristics of Soils in the Development of Methods for Modeling the Prevention of Erosion Processes
Authors: Chelovechkova A V , Komissarova I V , Mirosnichenko N V 
Published: April 2021

Abstract
In the practice of agricultural production, there are enough examples in the field of agriculture, when non-observance and violation of the laws of agriculture did not receive positive results. These include unjustified land reclamation, chemicalization, intensive technologies, reforming the agro-industrial complex. Taken without taking into account mutual, systemic connections, factors and methods seemed to be quite reasonable, extremely necessary, ecologically justified, and as a result, they often led to negative results of the functioning of agricultural production. In addition, it must be borne in mind that the state of agriculture has a huge impact on all aspects of the life of society and the country as a whole. It should be reminded of food independence and self-sufficiency in food. The laws of agriculture are manifested in production conditions in the universal law of conservation of matter and energy, in the system man - nature. Attempts to solve problems without scientific substantiation, bypass or ignore objective economic and natural laws have always ended in failure. In order not to unreasonably harm agroecological landscapes, an increasing number of computer techniques are proposed for modeling soil processes.
Automation of Land Use Planning Based on Geoinformation Modeling
Authors: Zudilin S N , Iralieva Yu S 
Published: April 2021

Abstract
The relevance of the presented research stems from the need to develop new methods of automation of on-farm land management using modern geoinformation technologies. The aim of the study is to develop and implement new methods of geoinformation technologies to automate the process of land management in agricultural enterprises. The object of the research is new methods of geoinformation technologies, which allow automating the process of performing a cameral stage of work on land management design and organizing an information base for agroecological monitoring of the territory of agricultural enterprises. To achieve the goal of the study, we developed a geographic information model for creating land management projects to provide an ecological and economic justification for land use. For land management projects with the aim of designing crop rotations, the main initial data are: relief; agro-industrial soil groups; agricultural plots; ecological and technological groups of arable land. This model was tested on the example of SPK im. Kuibyshev, Kinelsky district, Samara region. In the work, the influence of the conditional working length of the field on the productivity of the equipment was studied and analyzed, an equation was obtained for the dependence of the time losses for idle turns and arrivals on the length of the run (average conditional length of the field). The application of the obtained formula in the automated system of economic substantiation of options for the organization of the territory of crop rotation in the preparation of projects for on-farm land management.
Evaluation of Thermodynamic Researches of Layered Fluids in the Design and Development of Deposits of Hydrocarbon Raw Materials
Authors: Inyakina E I , Tomskiy K O , Ivanova M S , Katanova R K , Krasnov I I 
Published: April 2021

Abstract
At present, publications devoted to modern experimental equipment are widely used in domestic and foreign scientific journals aimed at specialists in the field of hydrocarbon processing. Thus, the installation of PVT ratios from Chandler Engineering allows us to conduct research in a wide range of pressures and temperatures and determine the phase processes of hydrocarbons. In the experimental work performed with natural mixtures and reservoir gas condensate systems, a pattern was found. At high reservoir pressures and temperatures, condensates are characterized by an increased content of high molecular weight hydrocarbons of complex structure, which affects phase processes. The parameters and indicators determined on this installation are the initial ones for calculating the balance reserves of ethane, propane, butane, non-hydrocarbon components in the formation gas, designing development and field development, as well as further processing of condensate. The main goal of the work is to determine the effect of contact condensation, which manifests itself when the deposits are unevenly developed by the area of the field on the development of hydrocarbon reserves based on experimental thermodynamic studies.
Possibilities of Using Phytoenergy Systems in the Ecological Rehabilitation of Contaminated Areas of the Baikal Region
Authors: Timofeeva S S , Ponamoreva O N , Stom D I 
Published: April 2021

Abstract
Recently, green technologies based on the use of the purifying potential of plants have been rapidly developing. Wetland treatment systems have been designed. Variants of phytoenergetic systems are proposed that allow integrating phytoremediation and microbial fuel cells. The article summarizes and analyzes the achievements in the field of creating and mastering phytoremediation technologies in combination with the generation of bioelectric energy and evaluates the prospects of using this technology in local treatment facilities of hotel complexes in the Baikal natural territory. The results of studies on the assessment of the phyto-purification potential of aquatic vegetation growing directly in the bays of Lake Baikal are presented, and the selection of the most promising aquatic plants for use in phyto-purification facilities is carried out. The use of hybrid technology based on plant-fuel cells should contribute to solving the problems of ecological rehabilitation of the contaminated territories of the Baikal region. In places of intense recreational load, it will be possible to create autonomous local treatment facilities operating on the generated energy itself.