bluuebunny/crossref_metadata_2025_split huggingface dataset:
Test Analysis and Pipeline Risk Assessment of Oil and Gas Pipeline Laying in Typical Loess Area
Authors: Jing Shaodong , Sun Ruhua , Zhang Xin , Li Xiaoqian , Wang Siyu 
Published: May 2021

Abstract
In recent years, with the development of oil and gas storage and transportation technology, pipelines have been successfully laid and safely operated in areas with various geological and geographical characteristics. However, for pipelines in particular sections such as collapsible loess areas and landslide ones, oil and gas pipelines will be restricted by conditions. Different problems may even occur during laying and operation. On the basis of mechanical analysis and calculation, this paper establishes a mechanical model. Combined with similar simulation experiments, the influence of water flow erosion on oil and gas pipelines under different slope laying conditions is analyzed. At the same time, the risk assessment methods of special pipe sections in loess areas are established, which have certain guiding significance and reference value for pipeline laying in loess areas.
Risk Assessment of Debris Flow Disaster Based on Principal Component Analysis
Authors: Yu Dejie , Lv Lansong 
Published: May 2021

Abstract
Debris flow disasters have the characteristics of large energy, strong explosiveness, and great harm. They cause irreversible damage to the environment and at the same time, seriously threaten the safety of human life and property. Therefore, it is essential to evaluate the risk of debris flow. In this paper, nine factors such as the basin area, the length of the main ditch, and the cutting density of the basin along the Jinsha River are used to calculate the cumulative contribution rate to screen the principal components using the principal component analysis method, and then comprehensively score the linear combination of independent principal components. Therefore, the risk assessment of each debris flow channel is carried out, and the results obtained are compared with the methods in different documents, which shows that this method has better applicability and feasibility. This method of determining weights overcomes the shortcomings of the subjective method of determining weights and is more reasonable and objective. The research results can provide decisionmaking references for relevant departments and industries.
Disaster Prevention Route Planning of Fenglin Ancient Village Based on Space Syntax Analysis
Authors: Chun Hu , Wang Ning , Liu Yixi 
Published: May 2021

Abstract
The channel of a disaster prevention (hereinafter referred to as DP) system for traditional villages are roads and alleys (hereinafter referred to as RA) whose accessibility decides DP efficiency and route. This paper aims to illustrate how potential the RA of Fenglin Ancient Village (hereinafter referred to as FAV) are as DP channel and define insecure area by looking into accessibility layout which is produced by analysis on 2 indexes of space syntax (integration and choice). The result shows that the RA of FAV enjoy a high value of integration (1.059), with the middle area being most prominent. The average choice value is 1161.57, which reveals their low potential as passage. In accordance with the research result, the DP route map is planned, and strategy optimization is put forward.
Simulation of plastic waste model and control plastic waste
Authors: Wang Yifei , Fang Lanran , Zhao Lixiang 
Published: May 2021

Abstract
Based on this relationship, this paper attempts to ensure the use and development of plastics under the circumstance of minimizing environmental damage. Combined with the actual situation, this paper also puts forward the treatment and treatment of plastic waste in the future and the prevention and control measures. The development of plastic is now a global issue bothering the world for its wide impact on economy, politics and daily life, warning people to take effective measures as soon as possible to control white pollution and protect the ecological environment.
Analysis of Factors Affecting Water Environment Quality Based on Flow Analysis
Authors: Zhao Yichen , Guo Hongpeng , Qiao Yang , Ran Li 
Published: May 2021

Abstract
Taking Tianjin as an example, based on the existing research results, this author improves the framework of urban water flow map and draws a urban water flow map, by using the idea of process, and approaching from the reverse thinking of water environment → discharge (sewage) outlet→sewage treatment→ sewage collection→ water consumption→water supply →water resources. On this basis, the principal component regression method is used to find key factors affecting water environment quality in Tianjin, and provide a decision support for the overall optimization and integrated control of the urban water system.
Research on Urban Ecological Levees under the Background of the Great Protection of the Yangtze River
Authors: Zhang Fuping , Liu Guoqiang , Peng Zhenyang , Chen Jun , He Zijie 
Published: May 2021

Abstract
The proposal of the Yangtze River protection concept puts forward higher requirements for the ecological protection of cities along the Yangtze River. In recent years, the function of urban levees has gradually expanded from a single flood control function to ecological and social service function, playing an increasingly important role in improving the urban ecological environment and enhancing the image of city. This study proposes some new concepts of urban ecological levee planning and design, by combining the new development theory of the Yangtze River with the successful practical experience of urban ecological levee construction. Then, typical crosssections of urban ecological levee have been introduced as well as a case study of the construction of urban ecological levee. At last, some challenges of the urban ecological levee construction have been analysed. The research can provide guidelines for the planning and design of urban ecological levees.
Influence of Water Quality on the Flue Gas Desulfurization in a 350MW Coal-fired Power Plant
Authors: Liu Gaojun , Cai Xiangdong , Guo Yue , Li Qing 
Published: May 2021

Abstract
With the national ultra-low emission requirements, a large number of wet flue gas desulfurization has been used in the normal operation of coal-fired power plants. After long-term operation, various impurities will be enriched in the slurry of absorption tower, resulting in the reduction of desulfurization efficiency or foaming of the slurry of absorption tower, which will seriously affect the operation of the unit. It is necessary to study the influence of water quality on the desulfurization reaction of lime slurry. When the incoming water is reclaimed water, process water and filtrate respectively, the desulfurization reaction is simulated on the laboratory bench to compare its influence on the desulfurization reaction characteristics. The results show that. (1) The effect of process water on the desulfurization process is as follows. The largest amount of foaming of the desulfurization slurry and the inhibition of gypsum crystallization reaction, but the characteristics of particle size distribution in the generated gypsum slurry are most conducive to the slurry dehydration and the gypsum crystal quality is good. (2) The function of the filtrate is to minimize the foaming amount of the desulfurized slurry and the effect on the gypsum crystallization reaction. The characteristics of particle size distribution in the generated gypsum slurry are favorable for the slurry dehydration. The gypsum crystal size is the largest, but a small number of crystal particles appear at the same time, which affects the slurry dehydration to a certain extent. (3) The role of reclaimed water lies between process water and slurry.
Research on Optimization of Impregnation Conditions of Eucalyptus Veneer with Modification of Fire Retardancy
Authors: Deng Layun , Kang Di , Zhang Xi , Wang Dong , Wang Yong , Li Zhigao , Fan Youhua 
Published: May 2021

Abstract
The waterborne composite modifier was employed to treat Eucalyptus veneer to obtain fire retardancy. By response surface methodology (RSM), the effects of vacuum time, impregnation pressure, and impregnation time were investigated. The optimized impregnation conditions were obtained through RSM. The vacuum time, impregnation pressure, and impregnation time were 39 min, 0.9 MPa and 79 min, respectively. After validation test, under the optimized conditions, the average LOI of Eucalyptus veneer was 28.2% with the percentage error 4.49%. Therefore, this predictive model for the preparation of treated Eucalyptus veneer was accurate and reliable for practical manufacturing. Moreover, the SEM analysis illustrated that the cavity of wood was filled with modifier after impregnation under optimized conditions.
Review of Coal Gangue Characteristics and Ecological Restoration Management Technology
Authors: Li Yingte 
Published: May 2021

Abstract
Coal gangue has become one of the industrial wastes with the largest annual discharge and accumulated stock in China. The disorderly accumulation of coal gangue not only occupies a large amount of land resources and causes natural disasters, but also pollutes the surrounding ecological environment, which in turn affects human health and normal production and life. In this paper, the physical, chemical and pollution characteristics of coal gangue are summarized, and the ecological restoration mode is divided into two modes: traditional “end treatment” and “treatment while piling”. The action mechanism, advantages and disadvantages and application scope of various ecological restoration technologies involved in the two modes are listed, compared and analyzed, which provides scientific reference for the restoration and treatment of other similar geological environments.
Review on the Improvement of Human Settlement Environment Quality from the Perspective of Land Engineering
Authors: Liu Siqi , Zheng Junliang 
Published: May 2021

Abstract
Green, healthy and sustainable is the theme of China’s current development. The environmental problems caused by rapid urbanization and industrialization need to be solved. Among them, soil pollution is the most significant problem, which is also the most closely related to people’s life and work. More and more scholars begin to pay attention to the problem of soil pollution, but there is still a lack of engineering methods to achieve the expected goal. The core of land engineering is the organic reconstruction of soil, through physical, chemical and biological remediation methods to achieve the optimization of soil structure, reduce or eliminate land pollution, to meet the different needs of people. Human settlement environment is a comprehensive study of urban problems. The author thinks that the essence of urban problems is land problems. Land economy, land environment and the social equity and justice decided by them are the main aspects that affect the development of human settlement. Through the remediation of contaminated land, the human settlement will be fundamentally improved. Land engineering has important practical significance for improving the living environment, and provides a feasible path for land ecological construction.
Remediation technologies and risk assessment of soil contaminated with heavy metals
Authors: Peng Xin , Cui Yunxia , Cao Weiqi , Wu Zibo , Xia Mengru , Xu Lu 
Published: May 2021

Abstract
Soil contaminated with heavy metals is an urgent issue worldwide because of its great influence on human health and the ecological environment. Therefore, the remediation of heavy metal contaminated soil is more important, as well as the corresponding assessment methods. This review introduces the main sources of soil contamination with heavy metals, and the soil-remediation methods, and focuses on the risk assessment methods. Study shows that the major soil-remediation methods are phytoremediation and biological techniques. The risk assessment methods include ecological and human health risks, the aim of which is to understand the soil pollution degree and evaluate the availability of the soil.
Spatial Coupling Analysis on Carbon Emission, Industrial Structure and Ecological Benefits Coordination System: Performance of the Yellow River Basin
Authors: Zhu Zeyuan , Yu Xinran , Pang Qinghua 
Published: May 2021

Abstract
The contradiction between economic development and ecological protection in the Yellow River Basin has been serious for a long time. This paper bases on the Yellow River Basin and takes 9 provinces (autonomous regions) along the line to establish the measurement index of carbon emission, industrial structure and ecological benefit, and analyses the trend of temporal and spatial changes. Then, it builds the model of coupling coordination degree and studies the coordinating situation and dynamic interaction relationship of each part of the Yellow River basin by empirical research. The study shows that the carbon intensity of the Yellow River Basin was in a decreasing trend from north to south and improved noticeably from 2011 to 2017, especially in Ningxia Province. It can be concluded that the carbon emission, industrial structure and ecological benefit of the Yellow River Basin was generally in a moderately coupled state during the study period. The downstream region’s coupling degree was higher than that of the middle and upstream. Shandong Province took the lead, while Henan Province has improved most significantly in recent years. It is advised to take advantage of regional differentiation, accelerate industrial transformation, and improve environmental governance to facilitate coordinating development of all regions along the Yellow River Basin.
Outbreak and Prevention of Drupa and Drupella
Authors: Ruan YiLin 
Published: May 2021

Abstract
In order to effectively control the outbreak of Drupa and Drupella and protect the coral reef ecosystem, the biological characteristics, outbreak period, damage degree and causes of Drupa and Drupella were summarized. At the same time, based on the investigation and analysis of the South China Sea, the control measures are put forward. The results show that the main food of Drupa and Drupella is Acropora. Drupa and Drupella has the characteristics of small individual, long breeding cycle and clustering, and its outbreak seriously damages the coral reef ecosystem. There are signs of Drupa and Drupella outbreak in South China Sea and Hong Kong. The main reasons include hurricane transit, global warming and the reduction of natural enemies. Measures such as natural enemies, artificial cleaning, tracking monitoring and early warning can be used to control Drupa and Drupella.
Research on Distribution Strategy of Charging Piles for Electric Vehicles
Authors: Wang Jifa , Zhao Wenqing 
Published: May 2021

Abstract
The distribution and scale of charging piles needs to consider the power allocation and environmental adaptability of charging piles. Through the multi-objective optimization modeling, the heuristic algorithm is used to analyze the distribution strategy of charging piles in the region, and the distribution of charging piles is determined to meet the minimum consumption of charging path, and then the construction scale is determined according to the calculation of environmental fitness. The rationalization of charging pile distribution and construction scale can achieve the effective allocation of distribution and transmission.
Optimization and Analyses of an Organic Rankine Cycle System Utilizing Cold Energy of Liquefied Argon
Authors: Zou Wentian , Xiao Youjun , Zhang Xi , Yi Qi , Li Le , Tong Pan , Chen Xiaoxue , Qi Jing , Zhang Wanliang 
Published: May 2021

Abstract
In order to study the feasibility of liquefied argon cold energy recovery by organic rankine cycle (ORC), an ORC system cooling by liquefied argon was proposed and the mathematical model was established in this paper. The thermophysical properties of several organic working substances were compared, and R218 demonstrates the best circulating performance under working condition. The operating characteristics of the ORC system under various parameters were analyzed and optimized. When the condensing pressure is 13.6kPa, the system output power reaches the peak value of 1.003kW. With the raising of the evaporation pressure, the net output power and the thermal efficiency of the ORC both increase. The raising of ambient temperature can effectively promote the circulating working substance in the evaporator to absorb heat from the air. The working substance at the exit of condenser under saturated state is propitious to the net output power of the system.
Structure Optimization of Natural Gas Engine’s Intake Pipe Based on One-Dimensional and Three-Dimensional Coupled Simulation
Authors: He Haibin , Ruan Xiaodong , Wu Jie , Zhao Fujian , Wu Feng , Wang Lei , Yin Jichong 
Published: May 2021

Abstract
A one-dimensional and three-dimensional coupled simulation model of a natural gas engine was established by using GT-POWER and FLUENT software based on the one-dimensional and three-dimensional coupling simulation method, and the structure of the intake pipe pressure-stabilized cavity was optimized by numerical simulation. Firstly, the veracity of the above model was verified according to the engine bench test results. Then, the average intake air flow and non-uniformity of intake air at different engine speeds were simulated and analyzed by using the above model. According to the simulation results, a multi-objective optimization model was established, and a single objective evaluation function was established by using the linear weighted sum method. The results show that when the inclination angle of the stabilized cavity is 15 degrees, the comprehensive intake capacity of the intake pipe will get the best. In which the average intake air flow rate is increased by 4.3%, and the maximum air inlet non-uniformity is reduced by 10.98% compared with the original machine.
Model construction of pumped storage to promote wind-photovoltaic consumption considering uncertainty of wind-photovoltaic output
Authors: Tian Shi , Zhang Kailin , Gong Chuanzheng , Li Yanbin , Zeng Ming , Li Ximei 
Published: May 2021

Abstract
With the continuous development of renewable energy in China, to improve its competitiveness in the power market, this paper considers the participation of pumped storage power plants in renewable energy generation system on the basis of wind-photovoltaic complementary joint dispatching, and then proposes a wind-photovoltaic-pumped storage joint dispatching optimization method considering the uncertainty of wind and solar output. This method takes the minimum wind and solar curtailment as the goal, considers the operation constraints of wind-photovoltaic generating units and pumped storage generating units, and establishes a coordinated dispatching model, which provides the basis and theoretical basis for formulating the output scheme of the coordinated dispatching of wind, photovoltaic and pumped storage.
Quantitative hydrate deposition prediction method and application in deep-water or permafrost gas pipelines
Authors: Jing Yu , Cheng Hui , Zhuo Lubing , Sun Wenchao , li Liu , long Chang , Wang Zhiyuan 
Published: May 2021

Abstract
Hydrate formation in pipelines seriously affects the efficiency of energy transmission. Adopting the production process of gas pipelines in deep-water or permafrost regions as the engineering application background, hydrate formation and deposition characteristics at different locations in gas pipelines are analyzed to realize the quantitative prediction of high-risk areas and degree of hydrate plugging in pipelines. A typical deep-water gas pipeline in the South China Sea is selected as an example. The calculation results show that the long-distance pipeline exhibits an obvious hydrate blockage risk area, which occurs 700-3200 m away from the pipeline inlet. The high-risk area of hydrate plugging in the system moves upstream of the pipeline with decreasing ambient temperature. The risk of hydrate blockage increases with decreasing pipeline inner diameter. The established quantitative prediction method for hydrate deposition in deep-water or permafrost gas pipelines accurately locates high-risk areas of hydrate plugging, which could effectively guide hydrate prevention and notably reduce the cost of hydrate control in deep-water or permafrost gas pipelines.
Sedimentary Fabrics for Thrombolite Bioherm in Cambrian Zhangxia Formation in the Western Part of Shandong Province
Authors: Gong Yunyun 
Published: May 2021

Abstract
Thrombolite is a non-laminated fabric of microbial carbonate, which is in sharp contrast with stromatolite that is characterized by the laminated fabric. Thrombolite bioherm developed in Cambrian Zhangxia Formation in the Western part of Shandong Province mainly consists of clots that are composed of dense micrite and microspar. Both the remain of calcified extracellular polymers (EPS) and calcified cyanobacteria fossils are observed within the clot that makes up thrombolite. Within the complex microscopic fabrics, it can be observed that the remain of calcified EPS are marked by the spherical structure, the sheet structure, the mat structure, and the honeycomb-like structure, which further indicate that the formation of clots within thrombolite should belong to a complex organic mineralization process. Together with both the dense micrite and the calcified cyanobacteria fossil, the calcified EPS provides an important clue for understanding the enigmatic formation mechanism of thrombolites. Therefore, this study can provide an important clue and thinking approach for further research in the future.
Exposure hazards of oxidative stress in environmental pollutants and application of plant antioxidants
Authors: Li Changlei , Chen Xiaoqing , Yi Hui Ling , Ma Baomiao 
Published: May 2021

Abstract
Environmental chemical pollutants are diverse and have complex and varied exposure forms. The release of these pollutants into the environment will cause oxidative stress reaction, which is caused by excessive and uncontrolled reactive oxygen species damage to proteins, lipids and DNA. To protect the health of humans and other species, the crack problem of environmental protection, through continuous exploration, found in acid medium, rhodamine B can produce characteristic fluorescence, Feton system to produce hydroxyl radicals can rapid oxidation of rhodamine B fluorescence quenching, and many natural antioxidants can partially remove hydroxyl radicals in solution, reduce the degree of fluorescence quenching. Based on this principle, a new method for the determination of the antioxidant activity of oligosaccharide proanthocyanidins was established, which provides a new way to solve the problem of environmental pollution.