bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Sports Tourism Promoting Sustainable Development of Coastal Rural Areas Based on Fuzzy Fault Tree
Authors: Shi Li-zhen , Li Xiao-dong , Cao Run-feng , Lei Meng-meng , Zhang Xiao-li 
Published: August 2020

Abstract
This paper discusses the problems and countermeasures of sports tourism in promoting sustainable development of coastal rural areas through literature data and fuzzy fault tree analysis. Based on the tourism supply chain theory and the actual situation of coastal rural revitalization, analyze the possible reasons for influencing sports tourism to promote rural sustainable development, and finally establish a fuzzy fault tree. Problems in rural sports tourism include the lack of social capital that hinders the sustainable development and construction of coastal villages; the lack of diversified forms of sports tourism to revitalize rural areas; and the neglect of the construction of urban-rural blending areas in coastal rural sports tourism. Conclusions: sports tourism should adapt to the development of the rural economy and actively absorb social capital; establish a development-oriented thinking of poverty alleviation through sports, and use subjective initiative to enrich sports tourism; take advantage of the difference in endowment of sports factors and make full use of urban-rural blending areas.
Temporal and Spatial Distribution of Chlorophyll-a in Caotang River of Three Gorges Reservoir
Authors: Zhang Yongsheng , Li Haiying , Ren Jiaying 
Published: August 2020

Abstract
To study the formation of algae blooms in Caotang River, a tributary of the Three Gorges Reservoir, the authors set up six monitoring sites in Caotang River and Yangtze River to continuously monitor the concentration of chlorophyll-a for one year from July 2017 to June 2018 and analyzed the distribution of algae blooms. It is found that in the vertical direction, chlorophyll-a had a maximum concentration at 2.41 mg/m3 at the surface and a minimum concentration of 0.69 mg/m3 at the bottom. The algae blooms broke out in Caotang River from July to September 2017, and there was no significant difference in the concentration of chlorophyll-a during other periods. During algae blooms, the concentration of chlorophyll-a increased from downstream to upstream except for the source section. There was no significant difference in the concentration of chlorophyll in the middle and bottom water bodies. The Yangtze River has a lower concentration of algal toxin than that in the Caotang River. Excluding the source where algal toxin was not observed, this study found that the concentrations of algal toxin in the other three sections (CT01, CT02 and CT03) were at 0.42 ug/L, 0.56 ug/L and 0.83 ug/L, respectively.
Analysis of Rainwater Pipelines for Local Flooding Mitigation
Authors: Zhang Zhaoxiang , Yang Fan , Huang Yongzhou , Fu Yandong , Li Yanjun , She Lei , Zhou Yanyan , Zhang Bin 
Published: August 2020

Abstract
PCSWMM was used to perform hydrodynamic simulation. Effect of water level, slope and diameter of rainwater pipelines on local flooding was investigated at free discharge and submerged discharge respectively. Bernoulli equation was applied to theoretical analysis. Results showed that increase of pipe slope and diameter could improve drainage capacity of rainwater pipes at free discharge. Rising water level seriously restricted drainage capacity of rainwater pipes. However, at submerged discharge, pipe slope promoted the construction cost, but it had no effect on its drainage capacity. With the increase of diameter, drainage capacity of rainwater pipes increased. Main factors on drainage capacity of pipes were water head different between upstream and downstream, pipe diameter and roughness coefficient. Hence, it’s recommended that urban drainage system should properly control water level and increase pipe diameter at submerged discharge. The results are important implications for rainwater pipeline design to prevent local flooding.
Research on the Construction of New Transportation Infrastructure in Beijing
Authors: Xin Wu 
Published: August 2020

Abstract
This paper analyzes the development of new transportation infrastructure in Beijing by taking the utility tunnel as an example. The utility tunnel is a modern and intensive urban infrastructure that is constructed by integrating various engineering pipelines, such as electricity, communications, gas, heating, water supply, and drainage in the underground tunnel space of cities. The construction of the underground pipe gallery is conducive to ensuring the comprehensive utilization of the underground space of cities, which can meet the needs of continuous growth of roads and paths, and facilitate intensive management. This article focuses on the development of the construction of the utility tunnel in Beijing. Based on analyzing the development bottlenecks of the underground utility tunnel in Beijing, implementing scientific planning, realizing intelligent management of the utility tunnel and establishing the paid use system are put forward in order to provide solutions for promoting the development of the utility tunnel in Beijing and solving urban transportation problems, and to promote high-quality development of transportation in Beijing.
Cycle and Harm of Main Pollutants in Thermal System of Gas Turbiner
Authors: Ruqing Niu , Fengyuan He , Yunfei Jiang , Xinjing Tian 
Published: August 2020

Abstract
This project analyzes and studies the monitoring data of chemical water vapor in the operation of a gas steam combined cycle generator unit, discusses the accuracy, measurement error and the correlation among various water vapor indexes of the (hydrogen) conductivity, pH value, sodium content, dissolved oxygen, silicate root, phosphate root and other monitoring experiments in the water vapor quality monitoring work, and puts forward the condensate and water supply which are easy to be measured accurately. Based on the hydrogen conductivity of saturated steam, superheated steam and the conductivity of boiler water, estimated the chlorine content, ammonia content, pH value and other indicators of water (steam) at each sampling point, comprehensively judged the accuracy of water quality measurement, preventd serious deterioration of water vapor quality, and ensured that the thermal equipment is free from corrosion, salt deposition and scaling.
Analysis on Ecological Footprint of Agricultural Heritage Sites under Tourism Utilization: A Case Study of Nanfeng County
Authors: Dongjun Chen , Hongbin Xie , Jing Zhang , Luyuan Chen 
Published: August 2020

Abstract
Tourism is an important way to achieve dynamic protection and adaptive management for agricultural heritage sites. The balanced relationship between tourism development and protection of agricultural heritage sites is the key to the sustainable development of its tourism industry. This paper uses Ecological Footprint Model (EF) to evaluate the ecological state of a specific agricultural heritage site, namely Nanfeng County in Jiangxi Province, China. The result indicates that Nanfeng County showed a safe ecological state under tourism utilization in 2015. It inspires how to realize sustainable tourism of agricultural heritage sites: 1) ecological environment is the guarantee of sustainable tourism development; 2) develop tourism adaptively based on actual resource characteristic; 3) social economy and tourism development should promote mutually. This study provides a scientific case for ecology security evaluation and sustainable tourism development of Nanfeng County.
Current status of microplastics pollution in tianjin coastal waters
Authors: Zhu Jingwen 
Published: August 2020

Abstract
Microplastics (MPs) have home a global concern as well as climate change, ozone separation and ocean discrimination. In order to restore the distribution characteristics and influence factors of MPs in Tianjin coastal waters, the distribution of MPs in three sections of Tianjin office area was studied by using surface sampling, density usage separation and alternative microscopies. The size, shape and chemical composition of MPs were further analyzed. Our results show that the extent of MPs in the sea water samples were rang from 210 to 1170 particles . m−3 with a mean of 612 particles . m−3 in the three sections of the offshore area. Three shape types of MPs were present in the seawater samples, including slender fibers, irregular fragments and thin films. Fibers and fragments were predominant forms, which accounted for 52.1% and 46.8%, respectively. The particle size of the detected MPs was consistent with those reported by previous studies. The smaller the particle size, higher the content 55.3% MPs had particle size of less than 0.5mm. According to the microscopy analysis result, most of MPs in surface seawater samples showed a deep color (such as blue, black and red), and a few MPs showed colors of yellow, green and while. The main chemical components of MPs were analyzed by using infrared microscopy components were detected, including PP-PE, ABS, CE, EP, PA, PE, PET, PP, and PVC, with an order of PET >PP-PE >EP >CE >ABS >PE >PA >PVC >PP. The results demonstrated that the MPs pollution in the Tianjin offshore area was affected by the development of marine industries, such as marine fishery, port transportation, etc. In addition, the MPs pollution in the ocean was also affected by land-based sewage discharge due to the fact that Tianjin was an industrialized city with a large population density.
Study on Coupling Mechanism of Carbon-Water Symbiosis System and Regulation and Control of Water Resources in the Context of Regional Collaborative Development
Authors: Zhong Wei , Zhang Dong 
Published: August 2020

Abstract
In the aspect of theoretical research, the regional carbon-water coupling mechanism has not yet formed a complete conceptual framework, so there is an urgent need to build an academic system of the carbon-water coupling under a unified physical device. Therefore, based on the overall identification of the coupling mechanism of the water cycle and carbon balance, this paper systematically analyses the characteristics of carbon capture and release in the process of water resources and energy development, puts forward the connotation, symptoms and overall tasks of water resources allocation based on low-carbon development model, and constructs a technical framework supported by regional carbon-water coupling simulation and water resources allocation. The critical technical issues such as water resources allocation, model construction process, countermeasures and safeguard measures based on the low-carbon model. The safety early warning model of water quality and quantity in regional carbon-water symbiosis system is put forward, which provides a method reference for the regulation and control of local water resources.
Research on the Impact of COVID19 on Global Economy
Authors: Mou Jinjin 
Published: August 2020

Abstract
With the development of cosmopolitanization and globalization, dense population and large-scale population flow not only make the economy more integrated, but also make the spread of the plague more rapidly. The impact is unprecedented. The outbreak of COVID-19 has disrupted the Chinese economy and is spreading globally. The evolution of the disease and its economic impact is highly uncertain. Because of its high infectivity, high mortality and incubation period, the main preventive measures are to control social distance and isolation, which makes many economic activities impossible. Global GDP will fall by as much as 3%, while developing countries will be the hardest hit, as much as 4% on average, but some were more than 6.5% and world merchandise trade will plummet by 13% in 2020 due to the COVID-19 pandemic. This paper analyzes the macro economic impact of new coronavirus on the world GDP, merchandise trade (taking China as an example with other countries), and various industries, and proposes some countermeasures.
Research Status of Microplastics Pollution in Abiotic Environment in China
Authors: Wang Z H , Sun X J 
Published: August 2020

Abstract
With the continuous attention to the microplastics pollution in the world, since 2014, Chinese scholars have rapidly carried out a large number of microplastics pollution investigation and experimental research. This paper summarizes the research results of microplastics pollution in abiotic environment (ocean, land water, soil, atmosphere) in this stage, in order to provide support for the future research.
Temporal Variation and Trend Prediction of Carbon Storage in Subtropical Evergreen Broad-leaved Forest in Jiangxi Province Based on Remote Sensing Images
Authors: Qiugen Zhang , Ruan Ding , Jian Li 
Published: August 2020

Abstract
The dynamic change of forest carbon storage can be monitored by remote sensing technology because the change of vegetation index can reflect the dynamic change of forest carbon storage based on the remote sensing images. Combined with remote sensing estimation model of vegetation and soil carbon storage based on the remote sensing classification area data of subtropical evergreen broad-leaved forest in 2015, the vegetation and soil carbon storage and carbon density of subtropical evergreen broad-leaved forest in Jiangxi province from 1985 to 2015 was estimated by using the remote sensing image data of Jiangxi province from 1985 to 2015. The results showed that the carbon storage and carbon density of subtropical evergreen broad-leaved forest in Jiangxi province had shown an overall increasing trend from 1985 to 2015. The carbon storage of vegetation had increased from 0.1254 GtC in 1985 to 0.2092GtC in 2015, and the carbon density of vegetation had increased from 63.071t/hm2 in 1985 to 76.31 t/hm2 in 2015. The soil carbon storage had increased from 0.3820 GtC in 1985 to 0.5474 GtC in 2015, and the soil carbon density had increased from 185.99 t/hm2 in 1985 to 199.69 t/hm2 in 2015. At the same time, the change trend of carbon storage in subtropical evergreen broad-leaved forests in Jiangxi province from 2020 to 2035 was predicted. The vegetation carbon storage will achieve 0.2774GtC, 0.2969GtC, 0.3164GtC and 0.3359GtC in 2020, 2025, 2030 and 2035 respectively. The soil carbon storage will achieve 0.5020GtC in 2020, 0.5335GtC in 2025, 0.5650GtC in 2030 and 0.5965GtC in 2035 respectively.
Water Quality Monitoring and Standardization in China: A Review
Authors: Tan Jing 
Published: August 2020

Abstract
Water quality monitoring is very important for environmental protection. At the same time, it is also an effective detection method for pollution control. In this paper, we review the standardization of water quality monitoring and in China systematically. Then, the differences in water quality standards between China and foreign countries are analyzed. Moreover, the water quality monitoring methods are investigated. Finally, the conclusion and perspective are given.
Ecological Compensation Standard of Groundwater
Authors: Fu Yicheng , Cui Xiaoyu , Zhao Jinyong , Peng Wenqi 
Published: August 2020

Abstract
According to the characteristics of groundwater and the requirements of groundwater protection, the ecological compensation standard of groundwater is discussed. Based on the study of groundwater characteristics at home and abroad, combined with the existing ecological compensation research, the ecological compensation standard of groundwater is discussed based on fair water use. Based on the determination of water distribution, pollutant discharge permission and water use income, and based on the social equity mechanism and the cooperative game, the upper limit of agricultural water demand in Cheng’an County under the current development mode is calculated to be 400 million m3, the lower limit to be 34 million m3, and the average to be 32 million m3. The people’s Government of Cheng‘an county shall compensate the farmers for their water saving. The compensation standard is based on the economic benefits of agricultural water use. The total compensation amount is 236 million yuan. The compensation standard is 6720 ¥/ha according to the accounting of 35 thousand ha farmland area. The calculation results of the groundwater ecological compensation model are reasonable and easy to implement, which provides a theoretical basis for the implementation of groundwater ecological compensation in Beijing Tianjin Hebei region.
Feasibility analysis of waste humus soil for Urban Greening
Authors: Cao Lihua , Wu Jun 
Published: August 2020

Abstract
From the landfill site which was closed for 15 years,10mm sieved humus soil was extracted as test material, to build the wild plant simulation leaching system. The regularity of pollutant release and the migration of heavy metals were studied in the system, in order to explore the feasibility of using humus soil for urban greening. The test results showed that the pH value of the leaching solution is between 6.8 and 7.7; the COD value is basically stable between 40 mg / L and 75 mg / L; the concentration of NH3-N is less than 1 mg / L; Between 200mg / L, it mainly exists in the form of nitrate nitrogen. Total and Morphology Analysis of four heavy metals (Cu, Zn, Pb, Ni) showed that all the metals were able to achieve the soil environmental quality risk of soil pollution control standard for GB36600-2018 in the nature of the land of green space and square, and the proportion of exchangeable and carbonate binding states in the four heavy metal were small, meanwhile the dissolution and mobility were small. In conclusion, humus soil has the feasibility to use for urban greening.
Lithofacies composition and geological significance of black rock series: a case study from the lower Cambrian Qiongzhusi Formation in Huize area, eastern Yunnan province
Authors: Cheng Yong , Lu Ping , Nie Qi , Liu Zhennan , Liu Cong , Wen Yiming , Guo Yufeng , Wu Shili 
Published: August 2020

Abstract
Lithofacies is an important basis for the characterization of source rocks, shale oil and tight oil reservoirs and the evaluation of oil and gas reservoirs. In this study, a well-developed Qiongzhusi Formation section in Huize area was selected to study the lithofacies features and their evolution and the following conclusions are obtained. In the geological section, the lower part of the Qiongzhusi Formation black rock series is mainly composed of felsic fine-grained sedimentary rock (I) and dolomite or limestone (II). The middle part of the section is clayey felsic fine-grained sedimentary rock (I2), and the upper part is felsic clay rock (III2). Lithologic changes in Qiongzhusi Formation were controlled by terrigenous debris supply, hydrodynamic conditions and water depth. The felsic fine-grained sedimentary rocks formed when the water body was relatively deep in the early stage and the felsic clay rocks deposited when the terrigenous clastic supply was weakened in the middle to late stage have a high content of original organic matter, which is a favorable site for the evaluation of shale gas reservoirs.
Residents’ action response experiments on different travel modes under the external conditions of a metropolitan environment
Authors: Luan Xin , Cheng Lin , Wu Zixin 
Published: August 2020

Abstract
The residents’ action response experiments are a complex decision making procedure and a natural science question influenced by multiple indicators and the built environment. It can reflect the urban traffic pattern and resident travel structure at a micro level, which gives us the motivation for better understanding and revealing residents’ behavioral characteristics and influencing factors of different travel modes quantificationally and systematically from the metropolitan environment perspective (novelty). This is of great guiding significance and necessity for the implementation of transportation demand control, optimization of urban traffic system, daily travel decisions of metropolitans, traffic environment, especially in the current application of computer big data analysis techniques. In this paper, we give a discussion and exploration for analyzing the people’s action response problem on different travel modes with external conditions in a metropolitan environment.
Short-term load forecasting algorithm based on LSTM-DBN considering the flexibility of electric vehicle
Authors: Na Zhang , HanZhen Tao , YuTong Liu , Jia Cui , JunYou Yang , Wang Gang 
Published: August 2020

Abstract
Due to the rapid development of electric vehicles, the randomness of charging and discharging modes brings huge challenges to load forecasting. Considering the large-scale gridding of electric vehicles, a load combination forecasting algorithm is proposed in this paper which considers the flexibility of electric vehicles. Firstly, the user behaviors of electric vehicle are modeled based on Monte Carlo method. Secondly, different from traditional single forecasting models, the combination of deep belief network and long short-term memory net-work is used in order to improve the forecasting accuracy and calculation speed for the complex case. Thirdly, a dynamic weight distribution method is proposed to combine the two forecasting results. Finally, Numerical examples have been performed with the results proving that the proposed method outperforms the state-of-art significantly in load forecasting, and the combined model has a higher forecasting accuracy than traditional methods.
Study on Interior Ballistic Characteristics of the Multi-gas Sources Ejection Power System
Authors: Bai Jianqiang , Wang Taikun , Qiang Xinwei , Sui Jiuling , Li Pengyong 
Published: August 2020

Abstract
In this paper, the internal ballistics model of the multi-gas sources ejection power system is established, the internal ballistics characteristics are studied, and the launch process of a certain missile is calculated by using the internal ballistics equation, and the important parameters such as velocity and acceleration of the missile, pressure and temperature in the launch cylinder are obtained. Compared with the pure gas single power launch scheme, the multi-gas sources ejection power system can effectively reduce the missile overload, reduce the pressure in the launching cylinder and improve the energy utilization efficiency. The maximum acceleration of the missile is reduced by more than 50%, which makes the movement process of the missile more stable and the interior ballistic trajectory more accurate; the maximum pressure in the launch cylinder is reduced by more than 45%, which greatly improves the launch safety, and also provides conditions for the lightweight of the launch device.
Research on Plant Core, Patch Repair Method of Huizhou Traditional Architecture Timber
Authors: Li Yucheng , Wang Wei , Wang Xing 
Published: August 2020

Abstract
Huizhou traditional architecture design method of repair beams is one of the hot spots in the present study of ancient architecture. Based on the basis of a large number of data collection and on-the-spot investigation, research and combined with the national regulations of the traditional building repair method of reinforcement beams, analysis of the Huizhou traditional architecture in timber frame beams damaged reasons, summed up the ancient building timber strength, stiffness the degree of the calculation formula and the core of planting of Huizhou traditional architecture beams by the finite element method, the crack patching reinforcement method is analyzed by numerical simulation. The results show that: when the damaged section beam strength and stiffness, through strengthening after the renovation has been improved; through the core and damaged beams, crack patching reinforcement method after repair is to meet the requirements of the standard. Through theoretical calculation and numerical analysis of beams, the calculation results are consistent, repair reinforcement design verification of Huizhou traditional architecture wooden frame beams The feasibility and feasibility of this method can be used as a reference for the protection and renovation of ancient buildings in Huizhou.