bluuebunny/crossref_metadata_2025_split huggingface dataset:
Construction of knowledge graph of forest musk deer based on BiLSTM-CRF model and DPA method
Authors: Yang Chuqiao , Wang Haiyan , Sai Jingyan , Zhang Peiwei , Yan Mengyao 
Published: December 2020

Abstract
Forest musk deer is a national key protected species, but due to overhunting and habitat destruction, wild musk deer has disappeared in large areas. Constructing a knowledge graph in the field of forest musk deer can standardize the relevant knowledge in the field of forest musk deer and lay a good foundation for wildlife protection and ecological construction. In order to construct the knowledge map of the forest musk deer, the entities were further subdivided first, and the BiLSTM-CRF model was used to identify the entities of the BIO-labeled data. After analysis, it was found that the model used in the experiment performed better. Secondly, the Dependency Parsing Analysis method was used to identify the relationship, and the relationship between the entities was smoothly extracted.Finally, the Neoj4 graph database was used to realize the storage and visualization of the knowledge graph of the forest musk deer. This research transforms the unstructured text in the field of forest musk deer into structured data. Through the systematic sorting of relevant knowledge in the field of forest musk deer, it can provide wildlife protection, artificial breeding of forest musk deer, intelligent knowledge services and other aspects some new technical means in the field of forest musk deer.
Comprehensive Water Resource Management Strategies in Arid Oasis Regions: Taking Minqin County as an Example
Authors: Ren Xiaoyan , Yin Qiang , Zhang Hengjia 
Published: December 2020

Abstract
Minqin County is the last line to block the closure of the Tengger Desert and Badanjilin Desert. For more than half a century, due to the influence of natural factors and human activities, the ecological environment of Minqin County has seriously deteriorated. The sustainable development of Minqin County has been restricted because of the unreasonable development and utilization of water resources. This paper analyses the problems and causes of the ecological environment, and reviews the main measures of water resources protection in Minqin County, including the implementation of wells closing and fields burying policy, the promotion of agricultural water-saving technology, the adjustment of planting and industrial structure, ecological migration, as well as the promotion of water rights and water price reform, the optimization of water structure, and discusses the achievements achieved. This paper summarizes the measures and effects of comprehensive control and provides a reference for the ecological restoration of the follow-up study area.
The optimization design and test of camfull-row-pick-up seeding mechanism
Authors: Li Liangliang , Niu Wenjing , Qi Zhengdong , Chen Jie , Guodang Lian , Haiyang Tang 
Published: December 2020

Abstract
The mechanism components and working principle were analysed, and then cam mechanism was simplified into slider-crank mechanism to facilitate the establishment of kinematic model. The target optimization function for structural parameters was solved out via mathematical model combined with the transplanting requirements, then a computer-aided analysis program based on Visual Basic 6.0 was developed for optimizing structural parameters of the mechanism. According to the optimized structural parameters, the three-dimensional model of mechanism was established and the automatic seedling pick-up test-bed was conducted. The analysis of kinematic simulation and the test of prototype test were carried out. The success rate of picking up seedlings reaches 95% and efficiency of taking seedling is 3600 strains per hour. The cam full-row-pick-up seedling mechanism is feasible and effective to achieve the operation requirements of whole-row-pick-up seedling.
Marine factory farming techniques and equipment
Authors: Xiao Jialuan , Zhang Yingyu 
Published: December 2020

Abstract
Marine factory farming is a short-lived but rapidly developing industry. Traditional aquaculture occupies a large area of water resources. At the same time, it has great damage to the environment and is not in line with the idea of sustainable development. Now marine resources have gradually become a hot topic. The marine factory farming industry combines a variety of emerging and traditional industries, such as machinery and automation, chemistry, biology, computer science, etc., have great development potential today. This paper discusses the technology and equipment in the process of marine factory culture from the basic situation of marine factory.
Target characteristic satellite observation modeling and artificial intelligence integrated application
Authors: Li Huizi , Hou Wei , Zhang Lili , Zhao Xiqi , Liu Zongyue 
Published: December 2020

Abstract
This article focuses on the core key and weak links of artificial intelligence applications in the field of satellite earth observation, carries out satellite reconnaissance modeling and simulation of different objects and different targets, and satellite space-based measurement and optimization of target characteristics, and establishes space-based target characteristics database and services. The platform makes it an infrastructure resource for artificial intelligence applications in the field of domestic satellite earth observation. Through the integrated application of artificial intelligence, the link between the target characteristics and the application is opened to promote the development of the satellite remote sensing application industry.
Research on Influencing Factors of Regional Economic Green Growth under Carbon Emissions constraint
Authors: Li Zhiyu , Zhou Yatong , Cai Songfeng , Lv Pengjuan 
Published: December 2020

Abstract
Promoting the green revolution is not only an urgent need to realize the coordinated development of economy, but also a strategic choice to cope with global climate change and reduce CO2 emissions. This paper incorporates carbon emission data into the economic growth analysis model, uses the SBM-DEA model to measure the green total factor productivity of each region, and uses panel data to investigate the factors affecting regional economic growth under carbon emission constraints. The research results show that industrial agglomeration, scientific and technological progress and human resource factors have a significant role in promoting the green growth of the regional economy, and energy consumption efficiency, investment efficiency, the structure of export products have a restrictive effect on the regional green growth. Therefore, it is necessary to more closely integrate the adjustment of industrial structure with technological innovation, improve energy utilization efficiency, and at the same time promote the innovation of financial policies to provide lasting impetus for the regional green sustainable development.
Predictive Analysis of Characteristic Variation and Evolution of Rainfall Cycle in Guangzhou
Authors: Liu Pei , Xu Wei , Pengfei Huang 
Published: December 2020

Abstract
Due to the influences of global warming, urban rainfall has changed significantly. Based on the annual rainfall data of Guangzhou from 1952 to 2019, the characteristics of interannual variation are statistically analyzed. The periodic characteristics of rainfall variation and its development trend prediction are studied by using non-parametric Mann-Kendall test, wavelet analysis and neural network methods. The results show that: After 1993, there was an increasing trend of rainfall in Guangzhou, and a sudden change in 2009, and the increasing trend of rainfall became more obvious. The 30a cycle scale of rainfall in Guangzhou shows the most significance. The average cycle of rainfall changes is around 19a. The rainfall in Guangzhou in 2020 is predicted to be 2,628.9mm, and the rainfall will be in “dry water” period from 2021 to 2029. The rainfall characteristics in Guangzhou are continuously changing under the influence of climate warming. This study is of great significance to reveal the recent drought and flood characteristics of the region.
The Study on Applied Status Stability of Water-Based Cutting Fluids at Numerical Control Machining of Aviation Aluminum Alloy
Authors: Xu Qiang , Chen Xuezhen , Hu Jinlong , Li Lianyu 
Published: December 2020

Abstract
When water-based cutting fluid is used in aviation aluminum alloy NC machining, soap precipitation and emulsification often occur due to its poor stability. It can cause the metal plate or equipment parts to scale or block the cutting fluid pipeline and filter system, which seriously affects the service life of the cutting fluid and the normal use of the equipment. At present, there is a lack of suitable evaluation standard for the stability of application state of water-based cutting fluid. In this paper, through the analysis of the state stability of four kinds of water-based cutting fluids, the state stability evaluation test is formulated. The hard water stability test and emulsion stability test are carried out for two kinds of semi synthetic cutting fluid and two kinds of fully synthetic cutting fluid. The test results show that this evaluation test can effectively evaluate the state stability performance of aviation aluminum alloy cutting fluid, and provide guidance for the optimization and management of cutting fluid in numerical control machining.
Remote Sensing Recognition of Construction Waste Accumulation Based on Resources satellite three Multi-view Stereoscopic Image
Authors: Jia Ziyi , Chen Qiang , Hong Shu , Cheng Qianhao 
Published: December 2020

Abstract
Due to economic growth and the development of urban modernization, the amount of construction waste is increasing year by year. The rapid identification of large-scale construction waste deposit is beneficial to improving urban planning and management capabilities. This article is based on the three-line array image stereo data of Resources satellite three to obtain DEM. At that time, Renzhuang Village in Pingdingshan was a test area. Based on the DEM elevation change information, the surface roughness coefficient of the structured surface was used as an irregular elevation texture feature, combined with the slope and aspect, to obtain the construction waste accumulation of other ground objects in the surrounding area. The overall recognition rate is 85.12%, and the Kappa coefficient is 0.70. It provides application value for the rapid identification of construction waste accumulation and its change information management and safety instability analysis.
Analysis of Temporal and Spatial Evolution and Influence Factors of Cultivated Land in Pearl River Delta Based on GIS
Authors: Zhao Xiao Juan , Ye Yun 
Published: December 2020

Abstract
In order to better explore the characteristics of the spatiotemporal changes of cultivated land, this paper comprehensively considers the utilization change of cultivated land in the Pearl River Delta from the multiple dimensions of the dynamic degree of cultivated land quantity change, location entropy, flow change, relative change rate of utilization, center of gravity, spatial characteristics of change rate, etc. from 2000 to 2014, in order to manage land use better and provide references for the protection of cultivated land, food security and sustainable use of land resources. The results show that the cultivated land and per capita cultivated land area in the Pearl River Delta region both showed a rapid decline and decreasing trend at the beginning, and then gradually eased. The degree of arable land use continues to increase and has developed from extensive to intensive. From the perspective of space, the rapid economic development areas such as Guangzhou, Foshan, Dongguan and Zhongshan have suffered serious loss of cultivated land. The demand for various types of construction land is constantly expanding. The adjustment of agricultural structure has exacerbated the non-agriculturalization of cultivated land. On the whole, the use of cultivated land in the Pearl River Delta has a tendency toward the south.
Willingness to pay for tourism ecological compensation and its influencing factors——Taking the best spring in the world in Ji’nan as an example
Authors: Zhang Ying , Li Yunyan 
Published: December 2020

Abstract
Tourism activities have a certain impact on the ecological environment of scenic spots, and ecological compensation is an effective economic means to protect the ecological environment. Taking the best spring in the world scenic spot in Jinan as an example, based on the contingent valuation method (CVM) and the establishment of binary logistic regression model, this paper studies the willingness to pay and the influencing factors of tourist ecological compensation. The results show that: 75.2% of tourists are willing to make ecological compensation, and the average willingness to pay is 3.99 yuan / person time; the main factors influencing the willingness to pay are gender, income level, tourist satisfaction, and tourists’ cognition of ecological protection; besides paying compensation, tourists are willing to participate in environmental protection publicity and clean the scenic area environment as volunteers Environment.
A study on the post-evaluation system of functional upgrading and transformation for old urban industrial areas
Authors: Yue X Y , Pan H Y , Tang P , Sun H , An Y 
Published: December 2020

Abstract
At the beginning of the 21st century, China began to transform and upgrade the old urban industrial areas. At present, it is relatively lack to research the post-evaluation system of functional upgrading and transformation for old urban industrial areas. This paper chooses and analyzes 24 typical projects of regeneration and transformation for old urban industrial areas through literature research. On the basis of analyzing the relevant literature research, policy implementation and practice results of typical projects, this paper proposes a post-evaluation system with comprehensive influence as the target and 5 influence dimensions and 21 evaluation factors through combining qualitative and quantitative techniques. Based on this, the connotation of evaluation factors is analyzed, so as to form a practical post-evaluation system of comprehensive influence.
Application research of flue gas depth reduction modification technology in 600MW thermal power unit
Authors: Nie Peng-Fei , Liu Zhi-Yuan 
Published: December 2020

Abstract
According to the policy requirement of No. 156 in 2018, the wet flue gas desulfurization system of a 600 MW unit in a power plant needs to be reformed for deep emission reduction. Based on the technical route of flue gas cooling and condensing, the influencing factors such as exhaust gas temperature and exhaust fan allowance are analyzed, and the design boundary parameters are reasonably selected. The technical characteristics of flue gas condenser and slurry cooler are compared. It is pointed out that slurry cooler has the advantages of no increase in flue gas system resistance, non-stop construction and low energy consumption, and is more suitable for field renovation. Aiming at the water balance problem of desulfurization system after using slurry cooler, this paper combs and analyzes the water balance items, and takes a series of measures: demolishing the first-stage absorber demister, collecting filtrate water and filter cloth washing water for pulping, recovering the slurry circulating pump sealing washing water, etc., which can basically meet the transformation needs. Special-shaped tray is installed in the absorption tower to improve the desulfurization and dust removal performance.
Dynamic experiment on de-fluoridation of Manganese-loaded Activated Alumina
Authors: Kang Ning , You Kun , Fu Jinxiang , Huang Diannan , Gao Yujia , Yang Rui 
Published: December 2020

Abstract
This work used Manganese-loaded Activated Alumina (MAA) as the adsorbent to analyze the effect of column height and filtration rate on the removal of fluoride and iron ions, and clarified the fluoride removal mechanism by using dynamic experiments when the fluoride and iron in drinking water exceed the standard at the same time. The results showed that the height of the column and the filtration rate have a significant impact on the operation of the system. It was the best operating condition for the system that the filtration rate was 1m/h and the column height was 300mm. After the system run for 102 hours, the fluoride ion effluent concentration exceeded the standard, which was 1.02mg / L; the concentration of iron ions in the effluent reached the standard stably after the system run for 1 hour, and the concentration was not more than 0.18mg/L. When the filtration rate was 1m/h and the column height was 150mm, the stable running time of fluoride removal of MAA column was 2.5 times that of ordinary activated alumina (AA); the start-up time of MAA to remove iron ions was one-twelfth of AA. The effect of removing fluoride and iron by MAA was significantly better than AA.
Numerical Investigation on Conjugate Heat Transfer in Helical Coiled Tube under Vertical Placement
Authors: Zhao Z X , Ma C , Li Y Q , Lu D , Lin Y S , Liu Y , Dai C H , Xiao Q , Gou J L 
Published: December 2020

Abstract
Conjugate heat transfer of supercritical CO2 inside helical coiled tube under vertical placement was investigated numerically in the present study. It can be concluded that the flow field of supercritical fluid is affected by both the buoyancy force and centrifugal force in conjugate heat transfer process. The dual effects of buoyancy force and centrifugal force lead to the deflection of second flow direction for the vertical placement, and further results in the heat transfer deterioration region on top generatrix wall for the downward flow larger than that for the upward flow. However, the overall heat transfer performance is slightly better than that in the upward flow in tube side.
Causes and solutions of a group split of resistance-capacitance absorber for parallel reactor
Authors: Li Suya , Zhang Chi , Li Lin , Dong Yanwei , Sun Zhao 
Published: December 2020

Abstract
The resistance-capacitance absorber is used in conjunction with the shunt reactor and is an important power grid equipment used to absorb the intercepted over-voltage generated during the switching process of the vacuum circuit breaker. However, the quality of the RC absorber itself affects the normal operation of the system to a certain extent.In this paper, group-cracking and oil-spilling fault of RC absorber in a 220kV transformer substation is on-site inspection, comparison test and disintegration. On this basis, solutions have been proposed, which have a certain significance to solve the group-cracking and oil-spilling fault of RC absorber.
Applications of Concentrating Photothermal Reactor in Coal Combustion Research
Authors: Li Hanjian , Chi Huanying , Hu Song , Yu Pengfeng , Huang Haizhou , Guo Tingting , Xiang Jun 
Published: December 2020

Abstract
High temperature, rapid heating rate and application potential of special reaction conditions (high pressure, high humidity, corrosive atmosphere) made the concentrating photothermal reactor (CPR) become a hot spot in the thermal experimental research. By the 1930s, the concepts of radical reactions and thermal equilibrium concepts had contributed to the formation of theoretical basis of coal combustion. The application of concentrating photothermal reactor in coal combustion research had provided a new perspective for this traditional subject. This paper introduced the structure and characteristics of concentrating photothermal reactor, and summarized the latest research results on the influence of heating rate, oxygen concentration and biomass addition on coal combustion. A potential frontier research direction - pressurized combustion based on concentrating photothermal reactor was also proposed.
Pipe Designs of the Closed Feedwater Heater Rankine Cycle Power Plant
Authors: Li Mingcheng , Luo Hongtao , Peng Maolin 
Published: December 2020

Abstract
How to lower global energy consumption and improve energy conversion efficiency remains a major challenge in the fields of science and technology. Scientists have done tremedous work to save energy. For example, scientists have improved and designed the different parts of heating systems to make it approach the thermal idealized cycle, in order to increase the waste-heat utilization rate and convert heat into other forms of useable energy. After thorough study of the Closed Feedwater Heater (FWH) Rankine Cycle power plant, this paper shows two possible designs to increase energy efficiency: the Cylinder and Sphere Feedwater Heater, and the Pipeline Mini Turbine. Compared with the old system components, they convert steam’s kinetic energy into usable electricity or other forms of energy and reduce the waste of energy caused by temperature differences and circulations. As a result, they increase the heat transfer efficiency between water and steam in the feedwater heater and save more money because of the reused component.
A typical dry-type iron core reactor failure and its treatment measures
Authors: Li Suya , Man Yuyan , Sun Zhao , Li Songyuan , Chen Rong , Zhao Cong 
Published: December 2020

Abstract
Dry-type iron core reactors frequently have various insulation faults due to their own process defects and operating environment impacts, which pose a certain threat to the safe and stable operation of the power grid. In this paper, the technicians conducted overall tests, on-site analysis, and comprehensive judgment on a 220kV dry-type iron-core shunt reactor, and proposed solutions on this basis, which have certain guiding significance for solving the insulation failure of the iron-core shunt reactor.
A Study on Decoupling of Carbon Emissions from Beijing-Tianjin-Hebei Transport Industry
Authors: Li Xinyue 
Published: December 2020

Abstract
As the world’s largest carbon emitter, the Chinese government is actively taking responsibility for reducing emissions and formulating relevant policies to achieve a low-carbon economy. The transportation industry is the third largest greenhouse gas emission source after the power industry and the steel industry in China, so the transportation industry is an important sector of carbon emission reduction in China. The Beijing-Tianjin-Hebei region is one of the supporting platforms for China’s strong competitiveness in the international economic system, but its transportation system develop pment is not balanced, and there are also great differences in energy consumption and carbon emissions. Therefore, it is of great significance to study the correlation between carbon emission and economic growth in The Beijing-Tianjin-Hebei region. In this context, this paper takes the Beijing-Tianjin-Hebei transportation industry as the research center, explores the decoupling relationship between its industry growth and carbon emissions, and gives relevant conclusions.