bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Feasibility Research for Sustainable General Aviation
Authors: Wang Yang , Feng Rongxin 
Published: August 2020

Abstract
The General Aviation industrial is dedicated to create smaller aircraft, which can be accepted as personal transport vehicle. However, regulations on the noise and pollution limited the active range of the aircraft with conventional fuel power system. General Aviation provides an effective transporting method, which saves traveling time compare to the motor car; it can be design for sustainable and affordable. The research shows using near future technology, GA can be remodelled as a low nuisance, low emission sustainable aircraft. A fuel cell based propulsive system for GA is analysed to improve the system efficiency. The reliability of electrical power system is addressed to create a power converting process that reduce the risk. The feasibility research over sustainable design of GA shows zero emission fully sustainable general aviation is possible in the near future.
Typical Application of Energy Storage in Power System
Authors: Zhao Yue , Wang Guilin , Ai Dengxin , Yang Bangyu , Gan Zhiyong , Wang Kun 
Published: August 2020

Abstract
The rapid improvement of renewable energy has brought great pressure to the power grid. To solve the problem, energy storage has been valued as an important flexible resource. Different types of energy storage have significant differences in technical and economic characteristics, and have different applications in power system. Now high capacity energy storage is playing a crucial part in ensuring the power system security and reliability, strengthening the peak-valley load regulation ability of regional power system, improving the capacity of power transmission and transformation, and improving the quality of electric energy. The performance and characteristics of different energy storage forms were discussed and the use of energy storage was analyzed in this paper. It could be concluded that energy storage will became more essential in the power system.
Sustainable Development and Management of Water Resources in the Yangtze River Basin
Authors: Peng Xianze , Chang Kexin 
Published: August 2020

Abstract
Water resources are the basic resources on which people depend for survival. They play an indispensable role in the procedure of modern economic society and also important links in the construction of ecological civilization. With the continuous acceleration of the industrialization process, the problem of rapid population increased cannot be furthermore underestimated. The healthy water resources have increasingly become a prerequisite for sustainable economic and social development, and it is imperative to strengthen the sustainable development and management of water resources. Therefore, including the existing problems in the management of water resources, and propose further development strategies, which provides feasible references for promoting the rational use of environmental resources and protecting China’s river basins.
Basic Characteristics and Application Progress of Supercritical Water
Authors: Zheng Hao , Yu Tao , Qu Chengtun , Li Wanjing , Wang Yanfei 
Published: August 2020

Abstract
Compared with water at normal temperature and normal pressure, supercritical water had large differences and also had some unique characteristics. In this paper, some basic physical properties of supercritical water, included density, viscosity, thermal conductivity, dielectric constant, ion product, hydrogen bond, diffusion coefficient and solubility, were introduced. Some applications of supercritical water oxidation technology in waste treatment, hydrogen production by supercritical water gasification of coal and supercritical hydr thermal synthesis, were discussed.
Toxic Rational Analysis of Oily Sludge and Its Treatment Residues
Authors: Li Wanjing , Yu Tao , Qu Chengtun , Zheng Hao , Wang Yanfei 
Published: August 2020

Abstract
In view of the present situation of oily sludge pollution, the different treatment methods for oily sludge in different uses were briefly described. The composition and structure of oily sludge are affected by sludge type, source, pyrolysis conditions and subsequent treatment conditions, which lead to different treatment methods and treatment effects. At present, there is no unified standard for the treatment of oily sludge at home and abroad, which brings difficulties to the unified management of oily sludge treatment. Through the toxicity analysis of oily sludge and its residues, it is helpful to judge the harmfulness of oily sludge and its treatment residues, according to the harmfulness of oily sludge, effectively choose different follow-up treatment methods, it is beneficial to establish the scientific standard of oily sludge treatment. In this paper, the present post-treatment indexes of petroleum hydrocarbon content, heavy metal ion content, water content, Polycyclic aromatic hydrocarbon content and sulfur content in oily sludge are summarized.
Research Progress on Corrosion of Oil and Gas Field Gathering Pipeline in H2S-CO2-Cl−System
Authors: Wang Yanfei , Li Jinling , Qu Chengtun , Li Wanjing , Baba Pali Muhammad , Zheng Hao 
Published: August 2020

Abstract
With the development of the oil and gas field industry, the corrosion of metal materials in the H2S/CO2 environment has greatly restricted the development of the oil and gas industry. The corrosion of metal materials has gradually been paid attention to. The corrosion of steel under the H2S-CO2-Cl− system has been studied. Imminent. This paper briefly describes the corrosion and types of H2S and CO2 in steel for gathering pipelines, focusing on the reaction mechanism of corrosion, so as to achieve a more accurate grasp of corrosion laws and provide a theoretical basis for the development of new protection technologies. Keywords. H2S/CO2 environment; gathering pipeline steel; corrosion.
Impurity Elements Determination in High Purity Gold by Using LA-ICP-MS
Authors: Wang Xuan , Yang Tingting , Huang Boling , Zhu Yong , Li Hui , Shen Jiani , Li Lansen , Li Miao 
Published: August 2020

Abstract
The various impurities in high purity gold directly affect the quality and value of gold, and which concentration is usually ultra-low. The laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is a quasi-non-destructive multi-elemental analytical method with low detection limits, high sensitivity and specificity. In this study, we introduce this method to detect impurity elements of 99.999% high purity gold through optimizing the parameters of laser energy density, repetition rate, and crater diameter. The concentration of 20 impurities were determined based on standard curve method, independently verified by glow discharge mass spectrometry (GD-MS) and inductively coupled plasma mass spectrometry (ICP-MS). The result shows the quantitative method was successfully used to the determination of impurity elements in high purity gold with the benefits of quasi-non-destruction, simplicity, real-time and green.
Photo-Based Monitoring of Particulate Matter in the Campus: A New Strategy for Student Health
Authors: Zhang Yonghui , Gu Ke , Xia Zhifang , Qiao Junfei 
Published: August 2020

Abstract
It is imperative for the students’ future health to ensure the students in good physical levels. Recent years have witnessed the increasingly serious harm to student health caused by the continually growing concentration of Particulate Matters (PMs). Consequently, the task of preventing and controlling PM concentrations in the campus is eagerly required. A well-designed model for the monitoring of PM (as the basis for PM prevention and control) has posed a big challenge. Prior works have revealed that photo-based methods are available for the monitoring of PM. Towards validating the effectiveness of existing methods for PM monitoring in the campus, we construct a novel dataset that involves 1,500 photos collected in the Beijing University of Technology. Results confirm that stated-of-the-art methods are far from ideal for the monitoring of PM in the campus. To solve the aforesaid issue, this paper further proposes a novel photo-based PM monitoring model by using the weighted average method solved by LASSO regression to fuse the above methods’ outputs tested to infer the PM values. Results demonstrate the superiority of our proposed model as compared to state-of-the-art methods on the large-scale AQPDBJUT dataset.
Research on Classification and Quantitative Prediction Method of Demolition Waste
Authors: Zhao Qin , Xi Chenggang , Dong Bochang 
Published: August 2020

Abstract
Starting from the analysis of the characteristics of the components removed from the building, the article analyzes the status of research and management of the classification and production of demolition waste at domestic and foreign. With the goal of maximizing the utilization of construction waste resources and rationalizing consumption disposal, on the basis of analyzing the resource attributes and environmental attributes of the demolition waste, a method for classification of demolition waste based on precise disposal was proposed, and the main influencing factors of the amount of demolition waste were analyzed. Based on this, a quantitative prediction method based on precise disposal is proposed.
Carbon Emission of Municipal Solid Waste in Shanghai
Authors: Jiang Yinhua , Zhang Hui , He Jiajun , Zeng Yanqin 
Published: August 2020

Abstract
In recent years, the issue of global warming caused by carbon emissions has attracted the attention of scholars from all walks of life. The amount of carbon emissions caused by urban activities has also been increasing. Especially, the contribution of urban household waste to carbon emissions is very high. It is the second largest global greenhouse gas. Adults are sources of emissions. The research object of this article is Shanghai Municipal Solid Waste, which simplifies the life cycle of domestic waste into two parts: transportation part and treatment part. It uses the provincial GHG inventory production method recommended by IPCC (2006) for the life of Shanghai from 2005 to 2015. Rubbish carries out carbon emission accounting and observes the changing trend of carbon emissions year by year. The results show that the production of domestic garbage in Shanghai has basically stabilized, and the proportion of household garbage disposed by sanitary landfills accounts for the most. The main carbon emissions in the transportation process are automobile vehicle tail gas emissions. The main carbon emissions in the waste treatment process are carbon emissions from sanitary landfills. The carbon emissions from landfill disposal are at a minimum, and the generation of household waste when incinerated and generated can be reduced. For Shanghai, the optimization of transportation routes and the reduction of sanitary landfill disposal of the amount of domestic waste is the most important emission reduction measure.
Discussion on Management-and-Control Mode for Precise Disposal of Construction and Demolition Waste
Authors: Peng Qiyun , Xi Chenggang , Wang Ning , Ren Fumin 
Published: August 2020

Abstract
Faced with the severe challenges brought by construction and demolition waste (CDW), it is urgent to explore a more reasonable and effective management-and-control mode to dispose CDW. By analyzing the current situation of CDW disposal in China, it is found that the extant measures are mainly for the purpose of during- and post-event supervision, and the key factor to improve the status of CDW disposal is the government’s pre-planning for recycling purpose. In view of this, a government-led management-and-control mode for precise disposal of CDW is proposed. The mode is implemented by the government in advance to determine the target value of CDW recycling, and optimize the allocation of CDW generation-transport-disposal chain on the basis of meeting the requirements of resource compliance, with three characteristics (precise classification recycling and quantitative prediction, precise control of transportation quantity, and precise planning for resource allocation) and two operating modes (“target limit of mandatory recycling + optimal distribution” and “target limit of mandatory recycling + free decision”). To achieve this mode, a series of countermeasures are proposed from the aspects of formulating policies, planning aims, setting up institutions, and building a supporting system.
Study on Feasible Carbon Reduction Paths Based on CO2 Abatement Cost Curve
Authors: Zhou Yalin , Wang Xuecheng 
Published: August 2020

Abstract
Estimation of CO2 abatement costs is a critical issue in achieving the targets of carbon emission reduction of China while promoting the economic growth. This paper builds an objective programming model to estimate the China’s marginal CO2 abatement costs during 2020-2030. We designed six different mitigation strategies based on China’s 60-65 percent carbon intensity reduction target by 2030 and investigated the total economic-wide cost of these strategies. The results show that the non-equal increasing strategies will significantly increase the overall cumulative carbon dioxide emission reduction and reduce the overall cost compared to the non-equal decreasing strategies and equal amount strategies.
Revision on Sect. Pterococcus and Sect. Calligonum in Junggar Basin Sympatric Species
Authors: Zhang Yueting , Feng Ying , Li Wenjun , Cao Quimei , Wei Shi 
Published: August 2020

Abstract
Because they are related to and resembling Sect. Pterococcus and Sect. Calligonum in Junggar Basin sympatric species. There is considerable controversy concerning the attribution about species classification? According to the literature studies and the specimens’ analysis, carry out fieldwork, this paper reviewed the fruit morphology, distribution pattern and the present conditions of different species. The key to sections and species in the genus is achieved. C. cordatum is reported about distribution newly recorded. The distribution maps in Junggar Basin are provided based on GPS of the species. The study provides a valuable method for taxonomy of species of Calligonum L.
Study on the Evaluation of Ecological Livable City in Anhui Based on Intuitionistic Fuzzy Theory
Authors: Gong Fang , Chen Xiuming 
Published: August 2020

Abstract
With the rapid development of new urbanization, the construction of ecological livable city has become a hot spot of attention. Through the study and comparison of the ecological livability of the main cities in Anhui Province, it provides a reference for the construction of ecological livable cities. First of all, the evaluation index system is constructed from four aspects: economic development, infrastructure construction, ecological environment and social livelihood. Based on intuitionistic fuzzy theory, an evaluation model of ecological livable city is constructed, and intuitionistic fuzzy entropy is used to calculate index weight. Then by collecting the data of 16 cities in Anhui province from 2014 to 2017, it is proved that the ecological livability of the main cities of Anhui province is ranked. Finally, based on the evaluation results, we can see that the contribution rate of air quality excellence rate, the third industry proportion to the GDP is larger than that of the livable city evaluation, and give some suggestions for building an ecological livable city.
Simulation Analysis of NO2 Pollution Diffusion Law Based on Gauss Plume Model: A Case Study from Hebei Province
Authors: Gao Tielin , Xu Donghai , Mi Yanxiang , Lu Yue 
Published: August 2020

Abstract
Controlling the large-scale haze in Beijing-Tianjin-Hebei region has become a social issue of great attention to government departments and the public. This paper establishes the NO2 diffusion model based on the Gauss plume model, by selecting Shijiazhuang city of Hebei Province as a case which is influenced seriously by NO2 pollution, and analyses the diffusion law, diffusion range and concentration change of NO2. Firstly, the conditions and parameters of the Gauss plume model are introduced, and the related factors affecting the NO2 diffusion are analyzed. Secondly, the pollution sources are classified into point pollution sources (chimneys) and line pollution sources (automobile exhaust), and combines the yearly weather conditions of Shijiazhuang such as wind speed, wind direction, atmosphere stability etc. Then, simulating the diffusion area and concentration change using Stata 13.1 software platform, we found: (1) The formation of NO2 pollution in Hebei Province is affected by special topography and unfavorable meteorological conditions; (2) The atmospheric stability is basically higher in autumn and winter; (3) Industrial emissions are the main source of NO2 in Hebei Province; (4) The concentration of NO2 pollutants near the emission source is the highest, and the concentration gradually decreases with increasing distance. The conclusion of the study has certain practical significance for the design and implementation of government environmental regulation and effective control and reduction of environmental pollution. The conclusion of the study has certain practical significance for the design and implementation of government environmental regulation and effective control and reduction of environmental pollution.
Analysis of the Effect of Urban Geometric Form Factors on Heat Islands in Guangzhou
Authors: Zheng Langtao , Tang Jian , Chen Xiong 
Published: August 2020

Abstract
The geometric form factors of urban space include height width ratio (H/W), sky view factor (SVF) and street direction, which directly affect the incidence of solar radiation, and then affect the temperature change of the block. In this study, the representative hot island and cold island streets in Guangzhou are selected as the research objects. According to the intensity and range distribution map of Guangzhou heat island in summer of 2014-2017 issued by Guangzhou Meteorological Bureau, the intersection area with high intensity of 4-year continuous heat island is found out by two-dimensional image superposition. In the region, the typical measurement points and comparison points are selected in groups, the temperature of each measurement point is monitored, and the urban geometry data is collected for comparative analysis. The results show that under the condition of the same underlying surface factor and no significant difference in artificial heat factor, the urban geometry can alleviate the heat island effect, and the measuring points with smaller sky view factor and larger height width ratio (H/W) have lower temperature, and the temperature of each measuring point has higher correlation with the size of SVF. In addition, the direction defined by the long axis of the valley will also affect the solar radiation equivalent of the street pavement, and the reclamation open land is also easy to become a heat island area.
Study of Controlling Factors on Productivity of Keshen Gas Field: A Deep Tight Sandstone Reservoir in Kuqa Depression
Authors: Zhang Yongzhong , Feng Jianwei , Luo Ruilan , Liu Zhaolong 
Published: August 2020

Abstract
The Keshen gas field in the Kuqa depression of the Tarim Basin with characteristics of deep buried depth, tight matrix and developed fracture, has great differences in gas well productivity within different parts of the structure, which bring difficulties to the gas field development and deployment. Based on the study of the reservoir matrix property, fracture characteristics and individual well productivity of the Keshen ultra-deep gas reservoirs, combined with reservoir geostress research, the difference between high and low efficiency wells in Keshen2 block is analysed, and the main geological factors influencing productivity are revealed. It is found that the effectiveness of reservoir fracture is a necessary condition for high production of gas well. Further study shows that there is a negative correlation between the open flow of gas well and the effective normal stress of fracture. The larger the effective normal stress of fracture is, the more difficult it is to achieve high production with reservoir reconstruction. According to study of the productivity influencing factors of the fractured tight sandstone reservoirs, some suggestions on well deployment and well perforation are given in the paper, which are beneficial to increase production and efficiency of this kind of reservoirs.
Commercial Vehicle Intake System Flow Field Mechanism Analysis
Authors: Li Sheng , Hu Xingjun , Chen Cunfu 
Published: August 2020

Abstract
The numerical simulation and fluid dynamics simulation of the internal flow field and its influence mechanism of a commercial vehicle intake system were carried out aim at studying the flow field characteristics of the intake system. The internal and surface pressure, velocity, and turbulent kinetic energy distribution of intake systems under the rated operating conditions and three high torque conditions of the engine were analyzed. The simulation results showed that with the increase of the mass flow of the intake air, the pressure distribution on the surface of the intake system increased, and the pressure drop of the inlet and outlet increased rapidly. With the increase of the mass flow, the scale and number of vortexes in the intake system increased sharply. The distribution of turbulent kinetic energy is more related to the velocity field distribution. However the internal turbulent energy distribution of the intake system is concentrated under one condition. As the intake air mass flow rate drops from 1,500 kg/h to 764 kg/h, the pressure drop of the intake system drops from 2,858,566 Pa to 721,411 Pa; the average turbulent energy decreases from 5.41 m2/s2; to 0.896 m2/s2. In this paper, the research on the flow field of the engine intake system aims to provide research directions for the early stage of the structural design of the intake system of large agricultural vehicles.
Study on the Dangerous Chemicals Embargoed from Inland Waterway Transport
Authors: Xie Tiansheng , Han Chao 
Published: August 2020

Abstract
Safety management of chemicals transport by inland waterways is closely connected with the safety of people’s lives and property and the protection of public environmental. This work aims to study how the dangerous chemicals embargoed from inland waterway transport can be designated in China. Firstly, the safety risks and the factors that may cause safety hazards at Yangtze River are investigated. Then, the regulations for dangerous chemicals embargoed from inland waterway transport in different countries are compared. Finally, the rules for the designation of the dangerous chemicals embargoed from inland waterway transport are proposed. This work promotes the understanding of safety management of chemicals transport by inland waterways.
An Axial and Torsional Percussion Hammer with Considerable Potential to Increase the Drilling Speed of High-Temperature Geothermal Wells
Authors: Zhang Heng , Ni Hongjian , Liu Shubin , Huang Bin , Liang Hongjun 
Published: August 2020

Abstract
Geothermal energy is a kind of green and sustainable energy and an essential alternative energy in the future. Improving the drilling speed of geothermal wells is helpful for the efficient exploitation of geothermal resources. Axial & Torsional Percussion Hammer (ATPH) was proposed in this paper for drilling enhancement. ATPH can convert the kinetic energy of the drilling fluid to percussion load, and improve the rock-breaking efficiency of the bit. Because of its mechanical seal design, it can operate efficiently at temperatures over 200 °C, which proves that it can be used in geothermal wells. The large eddy simulation (LES) method is chosen to calculate the percussion load characteristics of the ATPH oscillator, including its main frequency and amplitude. In the field drilling experiments of two high-temperature wells, ATPH showed better ROP enhancement ability and longer working life than PDM. In the well interval drilled by ATPH, the maximum temperature at the well bottom reached 202.54 °C.