bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experimental Study of Triaxial Test of Unsaturated Expansive Soil Shear Strength
Authors: Li Jianhua , Li Lianguo , Li Chungang 
Published: March 2021

Abstract
Based on unsaturated triaxial testing system, with different water content, the strength characteristics of expansive soils of Nanning are studied. Under certain confining pressure, with low water content, stress-strain curve is strain-softening, whereas with high water content, is strain hardening; Under high confining pressure, with low water content stress-strain curve is strain-hardening type, whereas with low confining pressure the stress-strain curve with the increase of axial strain is a slight softening trend. The shear strength of soil has a large sensitivity with moisture content. As the moisture content increases, the expansive soil friction angle decreases linearly. With the increase of water content, firstly its cohesive force increases, it reaches maximum value at the optimum water content, then it decreases with the increase of water content.
Experimental study on similar materials in model test based on orthogonal design
Authors: Li Jianguang , Zou Huisong , Sun Gengyu , Zhou Ziyi , Zeng Lingqi 
Published: March 2021

Abstract
The selection of simulation materials of aquiclude has an important influence on the results of the model test, and has a high requirement in terms of mechanics and hydrologic properties. According to the high quality of river sand as aggregate, cement and gypsum mixed aqueous solution as cementing material, organic silicon mixture similar material as additive, in accordance with the principle of orthogonal test design, sand-binder ratio, cement plaster - and concentration of organic silicon as factors, each factor is equipped with four levels, specimen preparation into under the different ratio of similar model, carries on the uniaxial compressive strength test, splitting test, penetration test and the moisture content test under the different ratio of compressive strength, tensile strength, permeability coefficient and softening coefficient, By means of the range analysis method of orthogonal experiment, the influence degree of each factor level on the similar material is summarized, and it is concluded that the ratio of sand gum to mechanical properties has great influence, and the concentration of organosilicone water has obvious influence on the water rational energy.The new solid-flow coupling simulation material developed in this paper can provide a new scheme for the model test of water-involved problems such as mining under confined water, water-retaining mining and construction in water-rich area, and has high application value.
Demand Analysis of Employment Talents based on Deep Learning
Authors: Chen Jian , Wu Jianbo , Jiang Wenrui 
Published: March 2021

Abstract
This paper forecasts the demand of urban talents in the future years from the perspective of urban talent demand and employment situation of Chinese students. To a certain extent, there is a relationship between the supply of talents in cities and the demand for talents in China. Artificial neural network is a kind of nonlinear system which contains some simple nonlinear connection points or calculation modules. BP neural network is one of the most widely studied and widely used artificial neural networks. BP neural network includes input layer and output layer, which overcomes the shortcomings of traditional evaluation methods and enriches the relevant evaluation methods. The evaluation results can truly map the nonlinear relationship among various analysis indexes. BP neural network model is suitable for nonlinear sample analysis and belongs to quantitative analysis. The grey prediction model belongs to qualitative analysis, which can predict the future development trend of the analysis object, and does not require high data. Therefore, this paper uses the combination of BP neural network model and gray prediction model to predict the talent demand of China’s College Students employment market reasonably and effectively, and finally analyzes the reliability of the prediction results. According to the prediction results, this paper puts forward the development strategy for the city, in order to promote the modernization of the city.
Research on measurement technology of cement bend resistant and compressive machine
Authors: lei Chen , lu Peng , bing Zhang , lu Liu 
Published: March 2021

Abstract
To study the influence of nano material microscopic structure on the macro-mechanical properties of concrete, using AE test and numerical simulation methods, the AE characteristic of Nano-concrete under cyclic loading was investigated. The results show that the Nano-concrete has Kaiser effect, however, it occurs in a certain stress level range. Compared with ordinary concrete, the Nano-concrete has higher AE energy, larger AE amplitude and stronger AE activity during the first 3 loading processes due to the micro influence of Nano-SiO2. Nevertheless, in the 4th loading, the AE energy cumulative curve of Nano-concrete is relatively flat because of the improvement of the bearing capacity of Nano-concrete. The numerical simulation results of RFPA and experimental results are consistent. The stress diagram and AE figure are able to image the characteristics of the specimen crack propagation process and the rupture position, which helps an in-depth understanding on the AE characteristics of Nano-concrete during its damage process.
Summary of Research on Evaluation of Local Scour around Bridge Pier
Authors: Duan Haipeng , Cao Jin , Zhang Yingjie , Huang Yankun , Wei Song , Jiang Yuxi 
Published: March 2021

Abstract
In recent years, bridge disasters caused by scour have occurred frequently; hence, scour has become one of the most important factors that threatens the safety of wading bridges. Although the research on the local scour around bridge pier has been carried out for many years, there are few research results on the evaluation of scour hazard of built bridge piers and that of unbuilt bridge piers. On the basis of previous research results at home and abroad, this paper systematically analyzes the research results related to the evaluation of local scour of bridge piers in recent decades, including the prediction of scour pit depth, the risk assessment of local scour failure and the prediction of scour depth based on risk theory. In this paper, the trend of local scour evaluation of bridge piers is also discussed.
A Note On the Urban Cluster’ Evolutionary Based on the Structure Equation
Authors: Zhang Fengyun , Li Shirong 
Published: March 2021

Abstract
In this paper we mainly discuss the determinant factors on urban cluster evolutionary, we find that: when considering the labor mobility, the increase of urban cluster degree accelerates the high skilled labor force to agglomerate in the core area, and then intensifies the urban spatial concentration. We get the same result for capital flow.
Research on Application Effect of Construction Technology in Agricultural Water Conservancy Project
Authors: Huan Zhou , Meng Li 
Published: March 2021

Abstract
In recent years, with the improvement of Chinese social productivity and the continuous development of science and technology, Chinese agricultural technology is constantly being reformed and developed. In this process, people are paying more and more attention to the development of agricultural science and technology. Development. Government departments have also invested a lot of talents, funds, technology and other aspects in agriculture, especially in the construction technology of farmland water conservancy projects, which has laid down a better and faster development for Chinese agriculture. Therefore, this article mainly analyses and discusses the construction technology of farmland water conservancy projects.
Mining secondary metabolism of achromobacter and analysis of key genes of petroleum degradation
Authors: Li Qianru 
Published: March 2021

Abstract
In this study, in order to further deepen the understanding of Achromobacter genomes in degrading petroleum, explore its secondary metabolic pathway, and make better use of this strain, the genomes of 20 Achromobacter strains were obtained from NCBI database, and analyzed by related gene information analysis software and secondary metabolite mining software. It was found that the genomes of 20 Achromobacter strains ranged in size from 5.67-7.21Mb to 7.21 MB. The GC content ranges from 63.7% to 68.2%, which contains 9 classes and 73 secondary metabolic gene clusters. The main secondary metabolic gene clusters are tetrahydropyrimidine, phosphonate, aryl polyenes, etc. The main oil degradation functional genes are alkB, etc., so the main degradation objects are short-chain and medium-length alkanes. The analysis results of this study are helpful to understand the characteristics of achromobacter genome, so as to further explore its utilization potential in bioremediation.
Sedimentation of two unequal spheres in a square tube at low Reynolds numbers
Authors: Guan Geng , Ying Yuxiang , Nie Deming 
Published: March 2021

Abstract
The settling behaviors of two unequal spheres in a square tube at low Reynolds numbers were numerically studied through a three-dimensional lattice Boltzmann method (LBM). Due to the hydrodynamic interaction, a periodic state or a steady state is achieved according to the density ratio between the spheres. In addition, it is seen that the spheres form a staggered stable configuration at the steady state, for which both spheres rotate in the same manner. The effects of the Reynolds number were also examined.
Research Status and Hotspot Analysis of Mine Wasteland Reclamation Based on Bibliometric Method
Authors: Wang Na , Zhang Baoqiang 
Published: March 2021

Abstract
In order to reveal the research status and hot spots in the field of mine wasteland reclamation, this study uses the bibliometric method, uses CNKI database to retrieve the related literatures in the field of mine wasteland reclamation from 2000 to 2020, and makes a systematic analysis from the aspects of literature type, number of papers, keywords, main research institutions, fund projects and subject distribution. The results show that 856 papers were published from 2000 to 2020, and the number of papers increased from 2000 to 2014, reaching the highest in 2014. Colleges and universities play an important role in the research in this field. This paper analyzes the fund projects in this field. Most of them are funded by the state, and the state has given great support and attention to the research in this field.
Response of Enzyme Activity of Cultivated Saline Soil to Sand Covering
Authors: Wang Jian , Yang Chenxi , Guo Zhen 
Published: March 2021

Abstract
In order to clarify the response of soil enzyme activities of cultivated salinealkali soil to sand cover in the Loess Plateau-Mu Us Sandy ecotone. In this study, the soil enzyme activities of the saline-alkali soils before and after sand-covering (CK) and after sand-covering for three consecutive years were taken as the research objects. The results showed that the activities of four soil enzymes (urease, catalase, protease, and alkaline phosphatase) all increased to varying degrees after covering with sand. Among them, the effect of covering with sand on soil urease and alkaline phosphatase was significant. In general, the activities of the four soil enzymes are negatively correlated with soil physical properties (except porosity) and positively correlated with soil chemical properties. This study provides data support for revealing the long-term effects of sand-covering on soil enzyme activities of cultivated saline-alkali soils, and provides a reasonable idea and theoretical reference for the feasibility of using sand-covered soil organic restructuring technology in saline-alkali soil management.
The Status and Analysis of the Coordinated Education Mechanism in the “Party-League-Class Integration” in University
Authors: Gong Changfen 
Published: March 2021

Abstract
The “party-league-class integration” collaborative work mechanism is a coordinated management mode in which students’ party branch, league branch and class committee participate in and coordinate with each other in class management and jointly build excellent class. This paper takes the students of Nanchang Institute of Science and Technology as the research sample, covering freshmen to seniors of different genders and majors. A total of 508 questionnaires were distributed. This paper investigates the construction status of the collaborative education mechanism of “party-league-class integration” in Nanchang Institute of Science and Technology, uses SPSS16.0 statistical software to sort out the data, analyzes the existing problems in colleges and universities, and finds out the main influencing factors. With that in min, this paper puts forward the corresponding optimization measures and implementation path, so as to give play to the differences and unique advantages of the party-league-class. The research results can provide suggestions for the construction of students’ ideological and political education, and achieve the educational effect of “1+1+1>3”.
Study on the Harm of Saline Alkali Land and Its Improvement Technology in China
Authors: Zhang Baoqiang , Wang Na 
Published: March 2021

Abstract
As a common soil type, saline alkali land is widely distributed in China. The soil properties of saline alkali land are relatively special, and the utilization rate is relatively low. In the current situation of scarce soil resources, the improvement of saline alkali land has attracted much attention, and it is particularly urgent to speed up the improvement and utilization of saline alkali land. The improvement methods of saline alkali land are different. This paper analyzes the causes of the formation of saline alkali land, discusses the current situation and harm of saline alkali land, comprehensively expounds the physical improvement methods, chemical improvement methods, biological improvement methods and combination methods of saline alkali land treatment, and further puts forward the development trend of saline alkali land treatment technology in China.
Research on Microbial Remediation Technology Based on Oil Contamination of Oil and Gas Exploration Soil
Authors: Wang Xiaohui 
Published: March 2021

Abstract
The paper used the optimized in situ indigenous microbial flora and combined physical and chemical ecological remediation technology to carry out the field remediation of oil residue contaminated soil. The remediation results show that when the average residual oil content in the soil is 2898.25mg/kg, after the 99d microbial ecological remediation technology is implemented, the oil content in the soil can be degraded by more than 99%, which provides technical methods and methods for the remediation of residual oil pollution in the oil field. Feasibility study for popularization and application.
Shearer Cutting Pattern Recognition Based on Multi-scale Fuzzy Entropy and Support Vector Machine
Authors: Liang Bin , Liu Ze , Niu Yanbo 
Published: March 2021

Abstract
Aiming at the problem of low intelligent level of shearer, a shearer cutting pattern recognition method is proposed based on the combination of multi-scale fuzzy entropy, Laplace score and support vector machine. By extracting the multi-scale fuzzy entropy of the vibration signal under different cutting modes, the feature vector representing the cutting pattern is mastered. At the same time, the Laplace score is used to select the feature vectors with possessing rich cutting pattern information. The selected features are produced as the learning samples of support vector machine. The experimental system of shearer cutting coal-rock is built, and the vibration signals of rocker arm under different cutting patterns are extracted. The experimental analysis is carried out and the results indicate that the cutting pattern recognition method proposed in this paper has high recognition accuracy, and the correct rate can reach to 98.86%. The research results provide technical support for the intelligent and rapid development of fully mechanized mining face.
Research on Short Time Withstand Current Electrodynamic Analysis and Inspection Technology of Mine High Voltage Distribution Device
Authors: Zhu Jianfeng , Zhang Hongku , Zhao Xuliang , Yu Wenhai , Shao Mingjie , Shi Lei 
Published: March 2021

Abstract
In this paper, combined with the situation of coal mine safety production in China, the use environment and mechanical interlocking function of mining high-voltage distribution equipment are introduced in detail, the short-circuit fault hazards and the working principle of short-circuit protection are analyzed, and the technical requirements for short-time withstand current capability test are put forward in combination with industry standards. The short-time withstand current capability test system of mining high-voltage distribution equipment is designed, and the working principle of Roche coil current transformer is studied.
Effects of returning materials on the electrical conductivity of reclaimed soil and crop yield
Authors: Hu Ya , Mao Zhongan , Cheng Jie 
Published: March 2021

Abstract
In order to explore the maturation effects of different returning materials in the soil reclamation of abandoned homesteads, this paper studied the characteristics of the soil conductivity profile distribution after adding fly ash, organic fertilizer and curing agent three kinds of returning materials, and the three consecutive years of crops yield. The results showed after three consecutive seasons, the soil conductivity of the cultivated layer decreased by applying organic fertilizer treatment, and the deep soil conductivity increased, which can reduce the possibility of secondary salinization. Crop yields of different returning materials are different. Compared with the other two returning materials, the application of organic fertilizer can better mature the abandoned homesteads and reclaim the soil, and promote the growth of winter wheat and summer corn.
Modulation Type Recognition Algorithm Based on Modulation Instantaneous Structure Difference and Deep Learning
Authors: Wang Zhongfang , Zhai Liuqun , Fu Jingwen 
Published: March 2021

Abstract
In order to solve the problems of signal modulation recognition in non-cooperative communication, this paper proposes a modulation type recognition algorithm based on instantaneous difference by neural network. Firstly, the method uses the structural difference of modulation parameters in time domain of modulation signal, and displays the difference in the form of image, so as to transform the modulation recognition problem into image recognition problem; secondly, it uses the advantage of convolution neural network to automatically extract features, and it classify different modulation signals; finally, a hierarchical neural network structure is formed to identify the unknown modulation signals.
Sustainable Tourism Development: A Case Study of Savannah, United States
Authors: Shi Xiaoying 
Published: March 2021

Abstract
The purpose of this study focuses on analysing sustainable tourism development in Savannah, Georgia, United States. Based on the notable factors of sustainable tourism mentioned in contemporary literature, three elements - impact, embeddedness, and authenticity were chosen to assess the current issues of Savannah’s tourism. The results of this study will also summarize suggestions and actions toward developing sustainable tourism in Savannah for the future.
Knowledge Maps Analysis of Research on settlement Landscape of Qiang based on the Citespace Method
Authors: Xiong Wei , Tu Mengyuan , Li Xin 
Published: March 2021

Abstract
Based on the relevant papers of Chinese periodicals in CNKI database from 2000 to 2020 and the information visualization software Citespace, this paper makes a visual analysis on the research of Qiang settlement landscape in China. Through the analysis of the knowledge maps’ structure of the authors, publishers and keywords cooccurrence of the Qiang settlement landscape research, the results show increasing annual publications of such research and a lack of breadth and depth in the content. The results also suggest insufficient connection or integration between fields and disciplines. The research results will be presented in five aspects: local landscape, Qiang culture, architectural cultural area, post-disaster reconstruction and public space. According to the review of the research field, this paper puts forward the following prospects. First, expanding the research scale and the combination of qualitative and quantitative research methods. Second, shifting the research focus to the human-land relationship and diversifying the research field of micro-analysis of spatial morphology by including intelligent management and development and utilization of settlements. Such efforts can provide further theoretical support for the protection, development and practice carried out in the Qiang settlement landscape of China, contributing to achieving the goal of rural revitalization and the implementation of the Beautiful China strategy.
Research on Short Video Communication Strategy of Local Culture Based on Rural Revitalization Strategy——Taking shadow play culture in Huanxian County of Gansu Province as an example
Authors: Wen Jinpeng 
Published: March 2021

Abstract
In this paper, based on the 5W theory of American scholar, Harold Dwight L asswellr, the research model of short video transmission of shadow play culture in Hua nxian County, Gansu Province is constructed. Through empirical research methods, thi s paper aims at the influence of 5W theory: Who, What, Which, Who, With What Effect. It is found that star communication has a significant positive impact on the transmis sion of shadow play culture, local villagers have a significant negative impact on the tr ansmission of shadow play culture, and professional teams have a significant positive i mpact on the transmission of shadow play culture. Text communication, picture comm unication, live video communication and cartoon communication all have a significant positive impact on the communication power of shadow play culture.
Study on land change based on principal component analysis
Authors: Shen Jing , Piao Dongfan 
Published: March 2021

Abstract
The Loess Plateau is the area with the most serious soil erosion and the most fragile ecological environment in China and even in the world. The deterioration of ecological environment may be closely related to unreasonable land use. In order to study the characteristics and driving factors of land use in small watershed of Loess Plateau, based on the land use data, DEM data and social data of Wuding River Basin in 1980, 1990, 2000, 2010 and 2018, this paper uses ArcGIS platform, land transfer matrix and land use dynamic degree to analyze them, and uses principal component analysis to discuss land use driving forces.
Analysis on the Coordination Mechanism of the First Class and the Second Class in Higher Vocational Colleges)
Authors: Wang Yuting 
Published: March 2021

Abstract
The traditional classroom teaching mode cannot stimulate students’ interest and initiative in learning. Introduce the second classroom to complement and extend the first classroom. It will improve the comprehensive quality of students. This article analyzes how to achieve synergy between these in order to improve the contribution of the second classroom in talent training.