bluuebunny/crossref_metadata_2025_split huggingface dataset:
Technology of Acid Soil Improvement with Biochar: A Review
Authors: Si Hongyu , Liang Xiaohui , Lu Jikai , Xiang Weiran , Li Yan , Wang Bing , Wang Haichao , Tang Chunhong , He Likun , Xin Hanxiao 
Published: March 2021

Abstract
This paper comprehensively analyzed and summarized the main research progress of biochar in improving acid soil technology at home and abroad. In this paper, the distribution, cause of formation and harm of acid soil were introduced, the differences between biochar improver and traditional improver were compared, the structure and functional basis of biochar were expounded, and the improvement of physical and chemical properties of acid soil was analyzed. Finally, combining with the current situation of China’s agricultural development, the paper puts forward the prospect of the problems that need to be paid attention to in the process of biochar research, in order to provide reference for the application and industrial development of biochar.
Research and empirical Analysis of Traffic flow Modeling based on fluid Mechanics
Authors: Tang Jie 
Published: March 2021

Abstract
In this paper, the overtaking lane change flow is introduced, and the corresponding traffic flow continuity equation is established. Through the differential analysis of traffic flow parameters, the motion differential equation of road traffic flow is established. Compared with fluid mechanics, according to Newton’s second law, the simple calculation of traffic pressure, viscous resistance coefficient and viscous resistance is put forward, and the interference from downstream traffic wave is defined as the viscosity of traffic flow, and the difference between wave velocity and maximum wave speed is the coefficient of viscous resistance along the way. the viscous resistance along the route is proportional to the length of the lane, the rate of change of flow along the direction of traffic flow and the coefficient of viscous resistance along the route. The model can obtain the relationship between traffic flow parameters. The simulation example shows that the model can reflect the basic characteristics of traffic flow.
Influence of free surface and bottom on flow around a cylinder
Authors: Chen Siqin , Lim Frank 
Published: March 2021

Abstract
Doing research on vortex-induced vibration (VIV), not only should we do some numerical simulation but also need to experiment. The existence of the free surface and bottom will influence the drag. We analyzed the drag under different velocity of water under different flow fields, then compared the results. The results show that the water depth will influence vortex shedding thus increase the drag. With a decrease of velocity, the effect of drag will be reduced. Nevertheless, it’s not always decreasing, when velocity lower than 0.8m/s, the effect would be steady.
Design of Control Unit of Mechanical Property Test System of Tai Lake Shield
Authors: Weng Yunxian , Zhao Yaping , Ni Xuewen 
Published: March 2021

Abstract
This paper focuses on the design and implementation of the detection device. This paper discusses that the control unit realizes the stepping drive by the interrupt method, realizes the force acquisition and the Modbus RTU communication by the polling method, designs the main program, the force acquisition subroutine flow, the stepping driver subroutine flow, and the Modbus slave subroutine flow, and realizes it through the Arduino IDE programming. Design the host computer interface, database association and command language programming; At last, the application effect of the test system is verified by the tensile test of water shield stem of taihu lake.
Ultrasonic Mixing Technology for Warm Mix Asphalt
Authors: Han Yurun , Yu Xuan , Fan Shunji , Liu Zichuan 
Published: March 2021

Abstract
At present the hot mix asphalt in the construction of pavement not only to consume a lot of energy, but also in the construction process will release a lot of harmful gases and dust, resulting in environmental pollution in order to improve the performance of asphalt materials, in order to promote energy conservation and emission reduction, the device in the warm mix asphalt technology, based on the use of ultrasonic cavitation technology and electric heating to disperse, heating asphalt, in order to obtain more excellent performance of pavement laying materials, while saving costs and reducing harmful emissions.
Research on the Foreign Trade Efficiency and Influencing Factors of the Yangtze River Delta under High-quality Development
Authors: Xie Yuhan , Zhang Ziyi 
Published: March 2021

Abstract
It has become the consensus of my country’s foreign trade development to promote the high-quality development of trade and accelerate the building of a strong trade country. The Yangtze River Delta is an important intersection of the “Belt and Road” and the Yangtze River Economic Belt. With its superior location environment, the Yangtze River Delta has become a leading force driving the overall high-quality development of China’s economy and trade. This paper discusses the status quo of foreign trade in the Yangtze River Delta from the perspective of high-quality development, constructs a foreign trade efficiency evaluation system based on the DEA model, measures the efficiency of foreign trade in the Yangtze River Delta, uses the Tobit model to analyze its foreign trade efficiency factors, and finally proposes strategies for improving foreign trade efficiency And the high-quality development path of regional trade, providing reference for decision-making for my country to coordinate the high-quality development of trade in the Yangtze River Delta and even across the country.
Research report on domestic and foreign insurance products
Authors: Qin Chenyi , Xu Fangqian , Chen Yuqing , Tian Mingke , Liu Zhiming 
Published: March 2021

Abstract
From the beginning, human society has an insurance awareness to deal with disasters and an insurance concept to accumulate wealth. In the spring and Autumn Period, Confucius’ thought of “spelling more than one” is quite representative. As an important element in the insurance industry, life insurance can effectively help people transfer risks, accumulate wealth, and plan life finances. The development of the life insurance industry and the improvement of its competitiveness are of great value to my country’s insurance industry. With the rapid growth of the Chinese economy since the reform and opening up, the life insurance industry has also maintained a rapid development trend. However, compared with overseas markets, my country’s life insurance industry still faces many constraints and development problems.
Research on sports Consumption level of urban residents in Lanzhou city based on data analysis
Authors: Li Fawei 
Published: March 2021

Abstract
Taking urban residents of Lanzhou city as the research object, this paper analyzes the level and structure of urban residents’ sports consumption.Some suggestions are put forward, such as increasing residents’ economic income, speeding up urban infrastructure construction and guiding residents’ sports consumption concept correctly.Hope to improve the level of sports consumption in Lanzhou city.
Family Endowment, Personal Characteristics, and Farmer’s Livelihood Differentiation — Based on an empirical study of 199 rural households in Sichuan Province
Authors: Jia Xinxin , Jiang Yuansheng 
Published: March 2021

Abstract
The differentiation of rural households’ livelihoods has become the most significant feature of rural social and economic development in the context of urbanization. Based on the survey data of 199 rural households in Sichuan Province in 2018, this article summarizes the types and characteristics of local rural households’ livelihood differentiation and uses the logit model. Family endowments and personal characteristics analyze the factors and degrees that affect the differentiation of farmers’ livelihoods. The results show that: (1) The number of part-time farmers in each survey location in Sichuan accounted for 66.66% of the total surveyed households, and parttime employment is very common. (2) In terms of family endowments, the greater the number of rural households’ labor, the more they tend to shift to the non-agricultural sector, and the higher the degree of migrant workers and the part-time employment of rural households, which promotes the differentiation of rural households’ livelihoods; The number of middle-aged and young people has a significant negative impact on farming households’ choices for farming, and it has a significant positive impact on migrant workers and self-employment; the number of minors and the elderly in the household has no significant impact on farming households’ choice of farming and migrant work; the number of households’ farmland has a significant impact on farming households Farming and part-time employment have a significant positive impact. The number of relatives and the availability of cars only have a significant impact on migrant workers. (3) In terms of personal characteristics, male, well-educated, well-healthy, and young and middle-aged laborers are more likely to go out, self-employed, and part-time. This leads to the fact that the rural surplus labor force is mostly feminized, aging, and low. The degree is based on academic qualifications.
Research on Reservoir Numerical Simulation with Consideration of Time-dependent Physical Properties
Authors: Zhao Pingqi , Ni Tianlu , He Shumei , Huang Fang , Liang Xiao , Zhang Zhipeng , Wei Pengpeng , Yu Gaoming 
Published: March 2021

Abstract
Fine reservoir description is an important prerequisite to ensure the scientific and efficient development of oilfields. Reservoir numerical simulation is an important tool for efficient development. The accuracy of reservoir description determines the reliability of numerical simulation results. After long-term water injection development, the physical properties of the reservoir have undergone great changes. How to identify the time-dependent law of reservoir physical properties and finely characterize them during numerical simulation has been the focus and research difficulty in this field in recent years. This paper combines the results of previous studies on the changes of reservoir physical properties in the later stage of water drive development in Area A with numerical simulation methods. Predecessors realized time-dependent numerical simulation methods include staged numerical simulation and self-developed numerical simulation programs. Although the above two types of methods can achieve the purpose of realizing time-dependent numerical simulation, they all have certain defects. The segmented simulation method requires multiple modeling, heavy workload, multiple manual operations, and poor continuity and non-directional calculation results. Although the self-developed numerical simulation program calculation results can have better continuity and directionality, but this requires a lot of manpower and material resources to carry out the research. The research and development cost is high, the cycle is long, and the simulation accuracy and speed are difficult to reach the level of commercial numerical simulation software in the short term. Based on the above analysis, this paper has developed a simulation program TD-SIM (Time Dependent Simulation) that combines the commercial numerical simulation software ECLIPSE and can realize the time-dependent function of the reservoir permeability field. This program has convenient use and low cost. At the same time, it is necessary to take into account faster simulation speed, higher simulation accuracy, and better continuity and directionality of the simulation results.
Research on Methods of Improving Historical Fitting Accuracy in Transitional Zone Area
Authors: Li Jiahui 
Published: March 2021

Abstract
The transitional zone of X Oilfield has a large development area, many oil and water wells, and the historical fitting accuracy is relatively low. The historical fitting accuracy of single wells in the whole area is only 62%. With the needs of oilfield development, it is inevitable to improve the historical fitting accuracy in the transitional zone. Therefore, this paper studies the method of improving the historical fitting accuracy in the 350m transitional zone of X Oilfield, and the historical fitting accuracy has increased by 13 percentage points.
A Research on the Applicable Modes of LID-based Slope Residence Planning
Authors: Zhang Mingrui , Tan Wenyong , Zhong Jia 
Published: March 2021

Abstract
LID provides a new way of thinking to solve urban waterlogging and runoff pollution, and has attracted many scholars to try to integrate the LID concept into the planning and design of residences. After comprehensive analysis of LID’s application into residence planning, it is found that the existing results are not suitable for slope residences, resulting in problems such as difficulty for rainwater to gather into the center of the block, grid-type road patterns not conforming to the characteristics of mountain cities, and some LID facilities layout unsuitable for slope residences.Therefore, combining the characteristics of mountainous areas, this article designs the “hexagonal” road network on behalf of the general road structure of slope residences. Furtehr, we find LID facilities suitable for slope residences and propose the rainwater runoff organization scheme in slope residences corresponding to the LID facilities. Finally, we explore the implementation of LID applicable modes in slope residences via the four continuous levels of architecture, site, road and greenbelt. It is hoped that the current research can supply some ideas to slope residence planning oriented to rain and flood management.
Research on Optimal Operation of Reservoirs in Shule River Irrigation District Based on Dynamic Programming with Successive Approximation Method
Authors: Ma Leping , Luo Qiang , Wu Yuhui , Zhao Chengping 
Published: March 2021

Abstract
Reservoir operation is an important means to realize optimal allocation of water resources. In order to reasonably distribute water resources in Shule River irrigation area and improve the utilization rate of water resources, according to the actual situation of Shule River irrigation area, taking the minimum annual water shortage and the highest irrigation guarantee rate of the whole irrigation area as the objective function, the deterministic long-term optimal operation model of reservoir group in the irrigation area is established, and the successive approximation dynamic programming ( DPSA ) is used to solve the problem, so as to realize the joint operation of Changma Reservoir, Shuangta Reservoir and Chijinxia Reservoir, and provide the basis and reference for the comprehensive management and scientific allocation of water resources in Shule River basin.
Short-Term Subway Passenger Flow Prediction Based on GCN-BiLSTM
Authors: Ma Donglin , Guo Yating , Ma Sizhou 
Published: March 2021

Abstract
Aiming at the problem that the accuracy of passenger flow prediction is not high, this paper presents a short-term passenger flow forecasting model based on Graph Convolutional Neural Network (GCN) and Bidirectional Long-term Memory Network (BiLSTM). Firstly, the historical traffic time series is divided into three time modes: recent period, daily period and weekly period; Secondly, we construct three models based on GCN and BiLSTM to capture the spatial and temporal dependence of the three patterns; Finally, the parameter matrix is used to fuse the output of the three time modes to obtain the final prediction result. By testing the data set of subway passenger flow in a city in January 2019, the experimental results show that the root mean square error of the model is reduced by 8.515% and the average absolute error is reduced by 4.239% compared with the single BiLSTM model, it has a high fitting degree with the real passenger flow value and has certain application value for the reasonable allocation of subway capacity.
Gis-based Urban Density on the Impact of Travel Demand Analysis
Authors: Xu Yuping , Chen Tao 
Published: March 2021

Abstract
Urban density is one of the important factors to measure the occurrence of traffic in a region. It can not only reflect the intensity of traffic demand well, but also provide a way to quantitatively analyze the influencing factors of urban traffic demand. Take Nanchang and Jiujiang, cities with different geomorphic features, for example. The spatial analysis technique of GIS is used to calculate the urban density that can reflect the density difference. According to the characteristics of urban traffic demand, urban density is divided into single density and compound density. Through spatial statistical analysis, the impacts of various urban densities on traffic occurrence, travel distance, travel time and travel mode are analyzed. The research shows that different urban density corresponds to different traffic demand characteristics; In a certain threshold range, there is an obvious monotonic relationship between urban density and traffic demand.
Design of Intelligent Detection System for Diesel Engine Main Oil Duct Hole Based on S7-300 Control
Authors: Wang Yanfeng , Xu Guangzhen , Zhou Quan , Chen Juan 
Published: March 2021

Abstract
The main oil channel of diesel engine cylinder block is the channel of lubricating oil, Whether they are smooth directly affects the working performance of diesel engine. This paper designs an intelligent detection system with programmable controller S7-300 as the control core, which mainly uses programmable control technology, photoelectric sensor technology and touch screen technology to complete the detection of cylinder main oil channel hole. The detection time is controlled within 38 s. This paper introduces the system composition and circuit working principle of detection system, and expounds the design scheme of PLC control system with S7-300 as the core. The design improves the detection speed, eliminates the missed inspection and false inspection, and provides the basic guarantee for the diesel engine to serve industry and agriculture efficiently.
Economic Loss of Optimal Configuration of Smart Energy System under Attack
Authors: Wang Peiyao , Yang Qicong , Xu Aidong , Guo Juan , Jiang Yixin , Wu Sihui , Zhang Peng , Fei Lingzhi , Zhang Yunan , Zhao Runhui , Zhang Tengyue 
Published: March 2021

AbstractThe data attack in smart grid may cause the control center to make a wrong judgment, and then interfere with the normal operation of the power grid. In the case of data attack, this paper studies the optimal allocation model of distributed energy in smart energy system. Taking the maximum net profit of microgrid system as the objective function, the constraint conditions are established by using battery charging and discharging and power exchange of large power grid to optimize the allocation of distributed energy in the system. According to the characteristics of its power load, the corresponding dispatching strategy is formulated, and the genetic algorithm is introduced to find the optimal solution of the model. The power supply composition and economic loss before and after the optimization and attack are obtained, which proves the importance of attack detection.
A Study on the Application of Blended Teaching to English Reading Course under the Background of Artificial Intelligence
Authors: Zhao Xiaoying , Yang Yanjun 
Published: March 2021

Abstract
The development of artificial intelligence technology brings a lot of benefits to various fields, including education. This paper discusses how artificial intelligence leads to the opportunity to improve learning processes and develop innovative approaches to education like blended teaching. Based on that, the author tries to provide tentative suggestions on the application of blended teaching to English reading courses with the help of artificial intelligence technology, in the hope of improving teaching and learning quality of this course, benefiting both teachers and students.
A Big Data Analysis of Job Position Status Based on Natural Language Processing
Authors: Liu Qi 
Published: March 2021

Abstract
With the development of the Internet and computer technology, news on the Internet has gradually been able to influence the development of the economy. In some special periods, with the development of major events, the economy and finance have undergone similar development and changes. This paper proposes a simplified natural language processing method for multi-grained text. First, the news text data is classified according to sentiment, and the correlation between corporate loans and job retention ability is further analysed. The experimental results show that under certain conditions, the Loans issued to SMEs are more conducive to retaining the number of jobs than large enterprises.
Study on Blended Teaching in Principles of Chemical Engineering Based on Cloud Platform
Authors: Ye Lijuan , Zhong Jiaming 
Published: March 2021

Abstract
Aiming at the questions existing in the teaching of “Principles of Chemical Engineering”, in order to cultivate students’ engineering application abilities, new technologies are integrated into the “three-transfer” theory (momentum transfer, heat transfer, and mass transfer), experimental projects are renovated, and virtual simulation experiments are added. Then, a new teaching system for chemical principles and experimental teaching on the basis of “one platform and three clients” (one cloud platform, mobile client, teacher client, and administration client) is constructed. It is a student-oriented blended teaching system driven by problems; develop abundant teaching resources, further consummate multimedia courseware, computer-aided teaching, and develop a three-dimensional teaching system with textbooks, multimedia courseware, chemical simulation software, and online classroom. To realize a student-oriented interactive process for learning and teaching with the guidance of teachers, and give full play to students’ initiative, activity, and creativity during their learning process; focus on strengthening the assessment for the experimental courses of chemical principles, strengthen classroom discussion and creative practical work, and improve students’ engineering application ability, as well as abilities of analyzing problems, solving problems, and raising problems by applying comprehensive knowledge.
Is the Optimization of Human Capital Structure Improving the Quality of China’s Economic Growth?
Authors: Zhang Hongxia , Wang Tianhui , Wang Yue , Zhang Yuge 
Published: March 2021

Abstract
Using the 1996-2016 Chinese provincial panel data to measure and analyze the human capital structure and total factor productivity, and empirically examines the impact of human capital structure on high-quality economic growth. The results show that the human capital of higher education promotes the high-quality growth of the economy more significantly, while the human capital of secondary education plays a significant inhibiting role. The heterogeneity study from three regions further shows that the impact of different levels of human capital on the high-quality economic growth of different regions is different. The higher education human capital has a greater role in promoting the high-quality economic growth of the three regions. Basic and secondary education human capital only affects the eastern region.