bluuebunny/crossref_metadata_2025_split huggingface dataset:
A preliminary study on the relation between camphor wood volatile matters and corrosion of museum metallic objects
Authors: Shen Jingyi 
Published: April 2020

Abstract
Camphor wood is a traditional storage material used in Chinese museums for repelling insects and inhibiting moulds. Since camphor wood continuously emits volatile matters, it leads to potential risks to museum collections on the other hand. Oddy test was conducted in this study to evaluate the reliability level of four different camphor wood samples for museum use. The samples were put into water and the pH values were measured in order to learn the acidity of each sample preliminarily. Modern instrumental methods including gas chromatography – mass spectrometry, X-ray diffraction and X-ray photoelectron spectroscopy, were employed to identify the volatile matters emitted by each sample and the corresponding corrosion products, respectively. The identification results were discussed together to infer possible corrosion mechanisms and evaluate the effects of aging time and species. The results showed that compared with the Cinnamomum camphora samples, the Cinnamomum glanduliferum sample led to higher risk to the metallic objects, while the reserve of acetic acid tended to decrease along with continuous aging of the Cinnamomum camphora sample but the risk did not decline significantly.
A study on drag reduction scheme of 200MW DACCU bag filter
Authors: Lyu Yu kun , Yang Jiaxi , Wang Jiawen 
Published: April 2020

Abstract
The DACCU bag filter is the main equipment of pollution control in power plant. The resistance is closely related to its structure. Based on the original structure size and field measured operation parameters of bag filter, the CFD was used for numerical simulation analysis to find out the area with the largest resistance in the original model, thereby meeting the actual demand of the overall resistance reduction and flue gas uniform distribution of the bag filter. Accordingly, three successive improvement schemes were designed from three aspects of flue gas inflow derection, flue gas distribution plate’s angle and the number of distribution plates. The numerical simulation method was used to optimize to the minimum resistance to ensure the safe and stable operation of the unit. It provides a reference for relevant engineering design.
Study on emission characteristics of non-road mobile source pollutants in Tianjin
Authors: Zhang Yi , Zhou Ran , Peng Shitao , Zhang Xin , Mao Hongjun , Zhu Lequn , Li Xiaojun , Zheng Lin , Wang Yisheng 
Published: April 2020

Abstract
According to the collected activity level data for 2018, the emission inventory of non-road mobile sources in Tianjin was updated with the method recommended by the ministry of environmental protection. In 2018, the emissions of CO, HC, NOx, PM, and SO2 from the non-road mobile source in Tianjin were 6.72×103 t, 2.85×103 t, 3.59×104 t, 1.63×103 t, and 1.69×104 t, respectively. Among all kinds of non-road mobile sources, emissions of ship were the largest, followed by non-road mobile machinery; civil aviation aircraft and railway locomotive were relatively small. In general, emissions from non-road mobile source rose from March through November, and were relatively low at the end of each year and the beginning of the following year. The discharge of pollutants was concentrated in rural areas and counties with developed agriculture, urban center with dense population and municipal construction, port area, railway lines and airports.
Improved Fuzzy Grey Relational-TOPSIS model for hazardous waste transporter selection
Authors: Liang Xuedong , Miao Jinrui , Lu Qian 
Published: April 2020

Abstract
With the continuous increase of hazardous waste production, environmental protection organizations all over the world pay more attention to it, and each link of the whole life cycle of hazardous waste becomes more and more standardized. Because waste production units (WPU) must strictly abide by the law to transport hazardous waste, and most WPU do not have the relevant qualifications, plus the particularity of hazardous waste, usually choose to outsource this business, so how to choose WPU becomes more important. This paper studies the selection of hazardous waste reverse logistics suppliers. Firstly, based on the characteristics of hazardous waste industry itself, this paper innovatively establishes the evaluation and selection index system of hazardous waste transporter (HWT) from five dimensions including technical capability, service level, economic level, environment and safety and additional services. Then the fuzzy grey relational-TOPSIS (F-GR-TOPSIS) model is established by improving the grey relational-topsis model. Through the fuzzy theory, the qualitative index is quantified, and the grey relational analysis method is used to give the objective weight to the index. Finally, an example is given to verify the effectiveness of the method, which provides a certain reference for WPU to select hazardous waste transporter.
Study of the effect of weathered coal activated by ultrasonic on speciation of Cr in soil
Authors: Liu Miao , Tang Shi , Wang Guojing , Xu Yuxin , Zhang Xue 
Published: April 2020

Abstract
The humic acid in weathered coal contains a large number of reactive functional groups which can stably combine with heavy metal ions in the environment. This changes its biochemical stability and water solubility, reducing the migration of heavy metal ions in the soil environment to achieve the purpose of remediation of heavy metal pollution. The goal of this paper is to investigate the effects of ultrasonic activated weathered coal on the speciation of chromium (Cr) in soil and bioavailability of Cr under pakchoi cultivation. The results showed that in comparison to the control group, both the content of exchangeable, reducible and oxidizable Cr and the absorption of Cr in the soil decreased after adding weathered coal. Under the conditions of 60g/kg of ultrasonic activated weathered coal, the content of Cr absorbed by pakchoi plants was the lowest, which was 62.0% lower than that of the control group. Additionally, the content of Cr in soil reached the maximum value, which was 12.7% higher than that of the control group. Cr mainly exists as a residual state in the environment and this was 755.8% higher than that of the control group. Under the same conditions of weathered coal addition, U-WC can significantly reduce the Cr content of the weak acid extracted, reducible and oxidizable fraction in the soil, and the effective Cr content is reduced, thereby reducing Cr migration and biotoxicity in soil. This provides a theoretical basis for the application of weathered coal humic acid fertiliser in the application of weathered coal fertiliser in Cr-polluted areas.
Analysis of global upstream oil and gas assets deal characteristics and regional influencing factors
Authors: Zou Qian , Wang Keming , Yin Xiuling , Peng Min 
Published: April 2020

Abstract
With the sustained decline and slow recovery of international oil prices, the global upstream oil & gas deal market has witnessed significant changes since 2014. Generally, five characteristics were present: (1) shrinking deal count, (2) dominance in North America tight oil, (3) matching deals and asset optimization strategy for oil giants, (4) sluggish deals of national oil companies, and (5) active deals of small oil companies and other investors. From the regional perspective, in North America, the deals in the Permian Basin remain active; in Latin America, the deals are dominated by asset disposal and deepwater tender; in Asia-Pacific, gas-related deal count rebounded after bottoming out; in Russia-Central Asia, asset sale is subject to the domestic financial situation; in Africa, the deal count hovers at a low level; in the Middle East, the market will be open. In 2019, as the oil price rises from a stable level, the deal upsurge will unfold again, and the unconventional oil & gas industry in the United States will be continuously integrated. Then, diversified players and extensive transaction opportunities can be expected on the oil & gas market.
Can the improvement of individual well-being predict rural residents ‘choice of green cooking energy consumption? -- Evidence from CFPS 2016
Authors: Liang Min , Wang Shuai , Zhang Ying , Pongpiachan Siwatt , Sun Yan 
Published: April 2020

Abstract
Based on the data of CFPS2016, this paper used binary Logistic regression model and coefficient of variation weighting method to weight the subjective and objective dimensions of individual well-being, and discussed the impact of subjective and objective well-being of rural residents on green cooking energy consumption. The study found that:(1) The increase of Nagelkerke R2 reached 51.2% after adding the subjective and objective well-being variable, which indicates that well-being is of great significance in explaining rural residents ‘green cooking energy consumption behaviour.(2) The subjective well-being and objective well-being of rural populations have a significant positive predictive role in green cooking energy consumption.(3) The variation coefficient of rural residents’ subjective environmental attitudes is the highest, indicating that there is a large difference in the level of environmental attitudes among rural groups. Subsequent governments should take it as an important point to guide the improvement of the overall level of rural residents’ environmental attitudes.(4) The demographic factors, gender, age and region of rural residents have significant influence on the choice of green cooking energy consumption. The above research is helpful to understand the influencing factors of rural residents’ green cooking energy consumption behaviour from the perspective of consumers, enrich academic literature in related fields, and provide reference for other green energy consumption behaviours of rural residents in China.
Research on coordinated development of urban energy system and economic system--Based on coupling coordination model
Authors: Bi Xueyao , Niu Bingjing , Liang Xuedong , Li Congjian 
Published: April 2020

Abstract
Energy provides an important impetus for urban economic growth, with 80% of the world’s energy consumption concentrated in cities. With the acceleration of economic development and urbanization, China has become the world’s largest consumer of energy. Based on the data of Chengdu, China, in 2009-2018, this paper constructs an urban economicenergy evaluation index system, and uses the entropy weight method and the coupling coordination model to analyse the coordinated development between urban economic growth and energy consumption. The results show that both the energy system and the economic system can be in a coordinated development in 2008 and 2014, and the energy system and economic system are basically in an uncoordinated development in other time periods. The development process of the coupling and coordination of energy and economic systems is generally a four-stage development: coordinated - uncoordinated - coordinated - uncoordinated. Therefore, based on the above research, it is proposed to promote the simultaneous optimization and development of urban energy systems and economic systems.
Current situation and prospect of Permian Basins in the United States
Authors: Wang Keming , Zou Qian , Wang Zuoqian , Peng Min 
Published: April 2020

Abstract
The Permian Basin of the United States is a hot spot for global mergers and acquisitions of oil & gas assets, with the transaction value as 20% of the world’s total. Majority of participants in these activities are small and medium-sized US companies. With the decreasing costs triggered by technical advancements, more and more large oil companies have started to acquire oil and gas assets in the Permian Basin. This paper analyzed the features of M&A transactions concerning the Permian Basin, and highlighted the root causes thereof from the perspective of geologic reserves, engineering technology and surface facilities. On this basis, the future situations on the global oil markets were forecasted.
Study on technical route and business mode of electric heating in rural areas of North China
Authors: Fu Guanjun , Zheng Kuan , Zhou Jue 
Published: April 2020

Abstract
In 2017, after the conversion of coal to gas and coal to electricity in parts of northern rural areas, there was a shortage of gas supply and power supply, reflecting the lack of overall planning and scientific management of rural clean heating. Based on the field case analysis and research in a rural area of Hebei Province, this paper studies the technical route and business model of electric heating in rural areas of North China. The research shows that the electricity consumption per unit area in the heating season is about 53∼133kWh, the electricity cost per unit area is about 23∼45 yuan, and the initial investment of equipment are mostly more than ten thousand yuan, which is beyond the user’s tolerance. Thus the single electric heating technology is not economically viable in rural areas. This paper proposed a combined technical scheme to carry out coal-to-electricity transformation according to local economic and resource conditions, which can solve about 68% of the coal-to-electricity demand in the village. It is necessary to coordinate and plan in a unified manner, and the business model uniformly organized and implemented by integrated energy service providers has great feasibility.
Optimal portfolio strategies of purchasing electricity for electricity company based on distributional robust CVaR
Authors: Huang Xiaoyao , Wang Xiaojian , Chen Liangjin , Ye Chengjin 
Published: April 2020

Abstract
Considering the uncertainty of probability distribution of electricity price in multi-energy markets and taking the maximum expected profits as optimization object, this paper establishes the optimal power purchasing portfolio model based on distributional robust CVaR. An optimal portfolio problem of purchasing proportion in real-time electricity market, day-ahead electricity market, and mid-long term contract market is transformed into a semi-definite programming problem. The analysis of case study shows the efficiency of the proposed model, which paves a new way for electricity companies to determine the optimal portfolio strategies considering the risk.
Research on daily energy trading strategy of multi-microgrid on distribution side
Authors: Li Lei , Shen Yue , Ma Tiantian 
Published: April 2020

Abstract
This paper studies the energy trading problem between multi-micro grids on the distribution side, and proposes a multi-micro grid energy trading method based on Nash bargaining. The Nash bargaining negotiation breakpoint is the optimal operating cost for direct trading between microgrid operators and distribution operators. This paper considers the cost of over-network transmission of electrical energy in the distribution network, and builds a cooperative game model for multi-microgrid bargaining transactions. Game equilibrium solving problem is solved by genetic algorithm.
Cooperative game trading mode of virtual power plant group
Authors: Huang Feng , Lin Qingming , Zhao Zengkai , Wang Liming 
Published: April 2020

Abstract
Considering the complementarity of wind energy and light energy, this paper puts forward the cooperative game of virtual power plant with different clean energy output. Through real-time information exchange, the cooperative game transaction mode of virtual power plant group is proposed based on the original traditional virtual power plants directly trading with the distribution network. In the virtual power plant cooperative alliance, the virtual power plant with more electric power and the virtual power plant with less electric power could share electric power, thus obtaining higher overall profits. The nucleolus theory is used to distribute the benefits of the alliance. The validity of the model is verified by simulation.
Landscape change in the Levuvhu and Nzhelele River catchments, Venda Limpopo Province South Africa
Authors: Vessal Ali , Musakwa Walter , Malapane Olgah Lerato 
Published: April 2020

Abstract
Little is known regarding landscape change, although the factors and implications of such changes are evident each day. Over the past decades rapid urban sprawl, urban land expansion, agricultural intensification and expansion of renewable energy use has had a negative impact on the environment and puts the sustainability of land at risk. This paper seeks to provide knowledge on global environmental change, landscape change and climate change and to identify the drives of landscape change and their implications. Moreover, the research study aims to provide data on the drivers that influence landscape change. It seeks to provide information on how land use change and landscape change in rural areas can be affected by factors such as urbanization, climate change and human activities (rivers, agriculture, deforestation and so forth). The study shall be focused on the Levuvhu and Nzhelele river catchment area, located within the Venda Region of the Limpopo Province in South Africa. Group focus discussions, field work and interviews were conducted to collect data with environmental, geography, landscape surveyors and the local ordinary residents within the areas. The results of the findings were assessed accordingly and provided to give a clear understanding of the importance of landscape change.
Study of temperature fields in a ball bearings bodies under boundary conditions of the third kind
Authors: Popov A I , Iglin P V , Gubareva K V , Iglina T V , Doronin A S 
Published: April 2020

Abstract
The reliability of the rolling bearing body directly affects the continuity and duration of operation of industrial equipment. Ball bearings are often used in centrifugal pumps of thermal power plants and water supply systems. Overheating and subsequent failure of such bearings lead to failure of pumping equipment. To avoid such breakdowns, it is necessary to study the thermal processes inside the rolling elements, which can lead to their deformation and destruction. In this paper, the problems of non-stationary heat transfer inside rolling bodies (spherical bodies) are considered. An analytical solution of the problem in dimensionless values of temperatures and coordinates is obtained on the basis of Fourier and Bubnov-Galerkin methods under boundary conditions of the third kind. The solution of such a problem requires the use of an extensive mathematical apparatus, so special software tools such as Mathcad and MatLab were used in the work. So solving the problem analytically in dimensionless quantities is convenient because it allows you to scale the results to all such objects without reference to a specific rolling body. As a result, the solution is obtained in the form of a power polynomial that does not contain special functions.
Research of Thyristor Voltage Regulator Effect on Power Flows Control in Distribution Electric Networks
Authors: Kralin A A , Bedretdinov R Sh , Kryukov E V , Pronina O A 
Published: April 2020

Abstract
The article is devoted to the power flows redistribution process research in distribution electric networks (DEN) with thyristor voltage regulator (TVR). TVR is intended to regulate power flows and voltage stabilization in the medium-voltage network of 6-20 kV. The problems in the medium-voltage network of 6-20 kV were analyzed and solutions were determined. It was established that the key development trend of DEN is the engineering and adoption of devices based on D-FACTS technologies. In addition, we considered the features, technical characteristics and control system of TVR. The research of power flow distribution in electric system was based on a simulation model of DEN with TVR. TVR allows to regulate power flows by changing the amplitude and phase angle of the voltage, with the help of longitudinal-transverse regulation. The results have shown that the TVR allows to align load schedules, to stabilize the voltage level in complex networks with unevenly loaded nodes and to realize optimal distribution of power flows in the electrical network.
Elements realization of software-algorithmic system optimization of technological processes based on adaptive methods
Authors: Rutskov A L , Sidorenko E V , Burkovsky V L , Fedorov Ya P 
Published: April 2020

Abstract
The paper examines a possibility to optimize complex technological processes of energy resources transfer and consumption. Notes the importance of unidentified and weakly formalized factors consideration, which influence quality of the described object classes functioning. Suggests use of fuzzy neural networks and controllers on their basis for implementation of technological processes optimization of energy resources transfer and consumption at the expense of its dynamic accuracy forecast improvement. Presents algorithmic realization, that later on configured in the MATLAB simulated environment. Quantitative and qualitative parameters, which characterize fuzzy neural controller’s usage quality, were received. Later, software environment elements are being described, which constructed on the basis of the suggested adaptive approach for complex technological processes optimization. Points out a possibility to conduct comparative study, and also simulation modeling implementation by way of presented solutions.
Computer simulation of the operation of the device for monitoring the state of high-voltage insulators during its operation
Authors: Zaripov D K , Balobanov R N , Zakirov D F 
Published: April 2020

Abstract
This article presents the design and operation principle of the high-voltage isolator state indicator of the high-voltage power transmission line. The present indicator operates without the use of a separate power supply on the principle of electric field energy accumulation. The efficiency of such a device requires that as little as possible be lost during energy storage. Therefore, the development of criteria for selection of elements of the indicator circuit with minimum leakage currents is fundamental, which was one of the first tasks set during simulation. Calculations were carried out by constructing and analyzing a three-dimensional model of the insulator and solving differential equations by finite element method in the COMSOL Multiphysics software environment. The object of the study was a linear suspended insulator with polymer insulation of LK 70/35 type, designed for insulation and attachment of wires of AC overhead power transmission lines with voltage from 35 to 500 kV. Computer simulations and all calculations were made for the said insulator. On the basis of the obtained results of simulation of the insulator operation with the optical indicator installed on it, requirements to electronic components of the developed scheme were formed and corresponding components were selected.