bluuebunny/crossref_metadata_2025 huggingface dataset:
Bibliometric Analysis of China’s Green Mining Development Based on CNKI Database
Authors: Mingyang Li , hong Cheng , Bin Wang , Kaiwen Zheng , Ping Li
Published: August 2020

Green development of mining requires the requirements of healthy and sustainable development, the development of green mining and the construction of green mines are important directions for the reform and development of the mineral resources management system. This article conducts data mining and exploration analysis of high-quality literature (core, CSSCI retrieval) on the theme of green mining included in CNKI from 1999 to 2019. the result shows that: according to the search criteria, we retrieved a total of 190 articles, since 2003, the number of documents on the topics of green mining has risen sharply, we found that the role of policy in promoting academic research is obvious. China University of Mining and Technology is the most published institution, studies from universities, institutions, and social groups have different research focuses on green mining. In the whole cycle of green mining construction, green exploitation and green mines construction play a vital role.
Energy Saving Design in Historical Settlements Planning of Northern Guangxi
Authors: Li Ji , Yao Bin
Published: August 2020

Based on the analysis of thermal environmental data of Jiangtou Village, a traditional settlement in northern Guangxi, this paper proposes that energy saving for planning is an important guide for building group design. In view of heat insulation and heat protection requirements in the summer, natural factors such as mountain, water body and terrain, as well as artificial factors such as roadway, yard and patio are analyzed respectively, which are important planning elements of energy saving. It summarizes the design methods of building group planning and energy saving, and provides ideas and theoretical basis for village reconstruction and architectural creation in northern Guangxi.
Research on Peak Load Shifting Based on Energy Storage and Air Conditioning Load in Power Grid
Authors: Xiao Pan , He Wangyi , Xin Houyi , Kun Tian , Jia Cui , Junyou Yang
Published: August 2020

In order to reduce the difference between peak load and off-peak load in summer and reduce the capacity of traditional energy storage system, an optimization strategy based on the coordinated control of battery energy storage system and air conditioning load was considered. Firstly, the control strategy of energy storage system based on threshold method considering electric storage capacity is proposed, and the dynamic changing process of air conditioning system setting temperature value is established to change the electric power of air conditioning system, that is, the virtual energy storage charging and discharging process of air conditioning system, the strategy of direct reduction and early charging of air-conditioning system are proposed. Secondly, the evaluation index of peak load cutting and valley filling is established, which emphasizes the local key of peak load and valley value. Finally, based on the theoretical analysis, taking a typical daily load forecasting curve of a commercial park as an example, the optimization strategy of coordinated control of battery energy storage system and air conditioning load is compared and analysed to verify its feasibility, it provides a basis for the application of battery energy storage system and air conditioning load in peak shaving and valley filling.
Summary of Motor Industrial Energy Conservation Policies in China
Authors: Liu Ren , Yang Peilan , Wang Gen
Published: August 2020

Starting from the 12th Five Year Plan, in order to promote industrial energy conservation and consumption reduction, industrial energy conservation policies are implemented in the industry, and different levels of industrial energy conservation responsibilities are assessed in different regions of the industry. As an effective tool for upgrading the industrial structure, energy conservation audit supports the continuous promotion of energy conservation work in accordance with relevant energy standards. In this paper, we survey all regulations, standards and policies and analysis them to get conclusion, industrial energy conservation policies in China is effectively to promote China energy conservation.
A method for evaluating the uncertainty of short-circuit current in power system with photovoltaic power generation
Authors: Wu Jiafang , Chen Gang , Xiao Yanhui , Hu Jiajia , Chen Guoqiang , Qian Weiyan , Zhou Niancheng
Published: August 2020

Short-circuit current of power system with photovoltaic power generation is related to the fault current provided by the photovoltaic power supply. In this paper, based on the analysis of low voltage ride-through uncertain region of photovoltaic power generation, the random model of low voltage off-grid is constructed. Further combining with the system fault information, based on the monte carlo simulation, a probabilistic assessment method of short-circuit current in power system is proposed, which takes into account uncertainty of photovoltaic low voltage ride-through. Finally, an example is given to verify the proposed method. The method in this paper comprehensively considers the random factors of power grid failure and photovoltaic power generation low voltage off-grid, and the short-circuit current result can accurately reflect actual short-circuit current level of the system.
Study on Benchmarking Evaluation System for Technological Innovation of Power Grid Enterprises
Authors: Chang Yan , Meng Weixuan
Published: August 2020

China attaches great importance to corporate scientific and technological innovation, and technological innovation has become a powerful driving force for continuous promotion of corporate scientific development. According to the new requirements of the 19th National Congress of the Communist Party of China on the reform and development of central enterprises and the high-quality economic development of the Fourth Plenary Session of the 19th Central Committee, the company’s scientific and technological innovation index evaluation was carried out. Based on the theoretical research, evaluation methods and enterprise management practices of world-class enterprises, this article establishes an effective mechanism to guide the technological innovation of power grid enterprises and provides a scientific decision-making basis for technological innovation of power grid enterprises.
Research on Optimization of Comprehensive Energy System Operation Scheduling Based on Multiple Energy Storage Coupling Mechanism
Authors: Shaojun Wu , Ming Chen , Zhen Wei , Jiabing Han , Jun Zhao
Published: August 2020

A comprehensive energy system based on multi-energy complementation is an important way to improve regional energy utilization efficiency and optimize resource allocation. Taking the minimization of the running cost of the integrated energy system as the objective function, a matrix model of the energy flow of the integrated energy equipment is established, and a method combining dynamic programming and improved particle swarm optimization is proposed. Under the same load and energy price setting, the horizontal comparison method was used to analyze the optimization of the integrated energy system under the conditions of no energy storage, two heat storage only, and three composite heat storage and cooling settings. The results showed that the operating costs of working condition three and working condition two are reduced by 14.65% and 5.92%, respectively compared with working condition one. The existence of energy storage devices has a significant impact on optimizing the overall operation scheduling of the system, while reducing the use of unnecessary energy supply equipment. At the same time of running costs, it can also achieve a more stable operation of the system.
Design of Comprehensive Energy System Simulation Platform Under the Background of the Park
Authors: Peng Yu , Shumin Sun , Yan Cheng , Dajun Wei , Guanglei Li , Shibai Wang
Published: August 2020

First, the overall architecture and data structure of the comprehensive energy system simulation tool in the context of the park are introduced. The core optimization method of the integrated energy system is proposed by revising the optimization toolbox in Matlab software. Secondly, the function simulation tool integrates the energy system, and elaborates the collection, analysis algorithm and application of the system function data from multiple display areas. Finally, establish a comprehensive energy system benefit evaluation, and put forward the prospect of comprehensive energy simulation research.
Field research of the impact of a hydropower station on the water temperature in the downstream river course
Authors: Huang Xiang , Shi Xiaoyan , Liu Sihua , Chen Bangfu
Published: August 2020

By online monitoring of the water temperature in the downstream river course of a power station, the author compared the temperature of water discharged from a hydropower station with the water temperature of the natural river course, and found that the temperature of water discharged from the power station was low in spring and summer, but high in autumn and winter; the maximum differences of temperature occur in April and December; the temperature of discharged water was 1.9 °C higher on average than that in the natural river course in April and was 4.9 °C lower on average than in the natural river course in December. Water samples were collected from similar water levels to compare the temperature of water discharged from the hydropower station and in the water inlet, and it was found that the temperature difference between the hydropower station and the inlet area was positively correlated to the water level of sampling. This study is expected to provide a technical basis for reservoir water temperature control and reservoir ecological regulation.
Analysis of Energy Utilization Efficiency of Integrated Energy System
Authors: Ye Jianmin , Wang Qingwei , Wang Yongli , Huang Feifei , Ma Yang , Ma Yuze , Dong Huanran , Song Fuhao
Published: August 2020

This paper considers the multi-energy flow characteristics of the integrated energy system and the impact of renewable energy access, and proposes an energy utilization index that is suitable for the energy efficiency assessment of the multi-energy collaborative integrated energy system. The index can comprehensively reflect the consumption rate of renewable energy and the utilization level of non-renewable energy in the park, and reflect the core characteristics of low-carbon and high-efficiency of the integrated energy system. The analysis compares the difference between the proposed indicator and other energy efficiency indicators. The result of the calculation example shows that, compared with the direct promotion of the traditional primary energy utilization rate, this indicator can more accurately reflect the advantages of multi-energy combined supply and energy cascade utilization in the park.
Integrated Energy Load Priority Scheduling Model Based on Customer Satisfaction
Authors: Chen Ming , Wei Zhen , An Shuhuai , Li Yukai , Xu Zhengqing
Published: August 2020

The integrated energy system is of great significance to improve the efficiency of social energy utilization, promote the large-scale consumption of renewable energy and the cascade utilization of energy. In view of the uncertainty of cooling, heating and electric load demand of users, this paper proposes a load priority supply model for integrated energy service providers, which considers the user satisfaction and the penalty function of energy supply interruption, and is used to deal with the scheduling optimization of various uncertain energy demand and translatable load. The optimal scheduling mathematical model of community integrated energy system is established. The various optimization objectives and the constraints of different energy demand are considered, the heuristic algorithm is used to solve the optimal scheduling, and the economic of operation mode is analyzed. The model can effectively reflect the impact of energy demand, user satisfaction and system cost on the priority of supply load, and provide the optimal decision to weigh the system cost and user satisfaction. The simulation results show the feasibility and effectiveness of the proposed model.
Applicability analysis of the wave energy converter in low wave energy density sea areas
Authors: Duan Derong , Zhang Junming , Chen Fei , Yang Xuefeng , Zhao Fang
Published: August 2020

The capture power of wave energy converter is affected by the interaction between the buoy and wave. This study aims to investigate the interaction between the buoy and wave motion in low wave energy density seas using the hydrodynamic calculation software AQWA and to achieve a reasonable optimal configuration for the greater capture power based on the orthogonal experiment. Results show that the wavelength in the resonance state increases with the increasing of buoy mass and increases first and then decreases with the increasing of buoy diameter. Taking capture power as the optimization goal, applicability analysis denotes that the wave energy converter with the mass of 4.2 t and the buoy diameter of 4 m is suitable for the Bohai Sea and the north of the Yellow Sea. The maximum capture power of 150 W is obtained in the Bohai Strait owing to the wavelength of 14 m. This study provides a new idea for the mass control, diameter selection and arrangement of the wave energy converter.
A pricing model of power battery closed-loop supply chain under government subsidies
Authors: Yan Jie , Xie Zhiming
Published: August 2020

Government subsidy is a common policy to promote re-manufacturing. In order to explore the pricing and coordination mechanism of power battery production under this policy, a two-period model was proposed. This model combines the supply constraints of partial recovery and full recovery to study the impact of government subsidies on the recovery and fracturing pricing of power battery manufacturers. The study shows that moderate subsidies will increase the recovery rate under both supply constraints. However, high subsidies will increase the output of new power batteries, leading to oversupply, which is not conducive to environmental protection. Therefore, the optimal value of the subsidy is the calculated threshold.
Input-output efficiency analysis of Chinese thermal power enterprises based on three-stage DEA
Authors: Zhu Keding , Wang Xiaomei , Ma Jibin
Published: August 2020

Since the new round of power system reform, the pace of power market construction has accelerated, and the scale of power market-based transactions has grown rapidly. The fierce marketization competition has continuously reduced the on-grid electricity price of thermal power. Now the thermal power enterprises are facing a severe test of operating conditions. Based on the panel data of several listed thermal power companies in Shanghai and Shenzhen in recent three years, this paper uses three-stage DEA model to analyze the input-output efficiency of thermal power enterprises. The research shows that the input of listed thermal power companies increases year by year, while their output decreases. The comparison of the first and third stages of the DEA model shows that the first stage overestimates the scale efficiency of this type of power generation company and underestimates the pure technical efficiency. Based on the research results, this paper puts forward the development suggestions for thermal power enterprises to keep up with the reform of China’s power market and improve their business conditions.
Analysis of the Development Status and Prospect of Multi-energy Complementary Technology
Authors: Yu Guanyi
Published: August 2020

Multi-energy complementary is an effective way to improve the overall efficiency of the energy system, improve the coordination of energy supply and demand, and promote the immediate consumption and efficient use of clean fossil energy and renewable energy. The implementation of the multi-energy complementary integration optimization project has prompted China to overcome a series of related technical problems in the energy field. This paper summarizes the current status of China’s multi-energy complementary development, explores industrial policies such as technology, economics, and institutional mechanisms accumulated during the process of multi-energy complementary development, and analyzes the development prospects of multi-energy complementary, with a view to better promoting regional clean fossil energy utilization levels and renewable energy technology advances contributions.
Measurement of carbon emission efficiency of China’s energy consumption and its spatial distribution pattern
Authors: Yu Zhipeng
Published: August 2020

Based on the data of eight kinds of energy consumption in each province from 2000 to 2016, the carbon emissions generated by energy consumption in each province are calculated, and the carbon emission efficiency of energy consumption is further calculated and its spatial distribution pattern is studied. The results show that the carbon emission efficiency of China’s energy consumption has improved as a whole during the sample period, and the efficiency distribution exists in different regions. To some extent, there is weak positive spatial correlation, but the overall Moran I index shows that there is no significant spatial correlation in the sample as a whole.
Multi-scenario generation technology considering extreme scenarios in energy system modeling
Authors: Xu Zhicheng , Lu Gang , Zhao Jiujin
Published: August 2020

In energy system planning and modeling, due to the increase in the proportion of renewable energy, its volatility and randomness require that the energy planning model be more detailed. Generally, typical scenarios are used to simulate changes in annual timing characteristics, so the generation of typical scenarios is particularly important. The characterization of the scenario requires that the generated scenario is representative and complete at the same time, and completeness requires the extreme scenarios should be considered. Extreme scenario-based energy system stress tests not only help policymakers consider previously overlooked stress or stress sources but also assess the potential extent of their impact and the affordability of these risks to energy systems, while also giving effective coping strategies.
Economic Dispatch Analysis of Comprehensive Energy System Considering Carbon Trading
Authors: Zhang Kai , Xu Nan , Ling Yunpeng , Zhou Bo , Song Yan
Published: August 2020

In the context of energy internet and low-carbon power, integrated energy systems have become an important carrier for energy saving and emission reduction. Aiming at the schedulable value of integrated energy service providers including electricity, heat and natural gas loads in the electricity market and the natural gas market, a low-carbon dispatch model for power systems considering the response of integrated energy service providers was established. The carbon trading mechanism is introduced into the system’s scheduling model, and a ladder calculation model for calculating the carbon trading cost in the carbon emission interval is constructed; considering the carbon trading cost and the cost of outsourced energy, a system suitable for electricity, heat and gas supply is established Low-carbon economic dispatch model. By comparing and analyzing the scheduling results of the three scheduling models, the effectiveness of the proposed model in considering the low-carbon and economic aspects of the system is verified. The analysis of the example shows that considering the response of integrated energy service providers in the electricity and natural gas market can reduce the carbon emissions of the power system and the operating cost of the entire system. The carbon trading mechanism and the comprehensive demand response are managed from the power generation side and the load. Effective means.
Analysis of Sustainable Development of Chinese Villages—Take the Design of XiangFeng Pastoral Complex in Guangzhou as an Example
Authors: Wang Tao , An Mingming , Huang Shuibao , Xiong Lu , Li Jinling
Published: August 2020

Aiming to support rural economic development, reduce the income gap between urban and rural residents, revitalize the rural economy, as well as encourage rural areas in all regions to carry out scientific, rational and sustainable development reforms, The Chinese government provides a certain amount of development approaches for rural planning and rural economic revitalization. In the setting of the The Chinese government’s rural strategy, design plans for rural complexes in various regions are emerging constantly. This article provides ideas for the planning and construction of pastoral complexes in other regions through the design ideas for the XiangFeng Pastoral complex in Guangzhou.
The Development Process, International Experience and Breakthrough Direction of Agricultural Supply side Structural Reform
Authors: Tian Peng peng , Zhao Dan , Li Dong mei
Published: August 2020

China’s agricultural supply side structure has experienced three major changes, but the effect is not obvious, so it is necessary to trace its roots and make a breakthrough. This paper explores the key points and difficulties in the three stages of China’s agricultural supply side reform, and finds that China’s agricultural supply side structural reform needs to break through three core points: removing the high inventory of main agricultural products, reducing farmers’ production costs, and making up for the safety and quality of agricultural products and the short board of ecological environment. Combined with the reform experience of the United States, Canada and India, this paper proposes to establish a diversified “government + market” policy regulation system, reduce agricultural production cost through multiple channels, improve agricultural production level, supplement the short board of modern agricultural production, realize sustainable green production, and seek an effective breakthrough in agricultural supply side structural reform.
Numerical analysis the effect of trees on the outdoor thermal environment and the building energy consumption in a residential neighborhood
Authors: Chengping Xu , Chunhui Yan , Jing Ren , Jiying Liu
Published: August 2020

Urban greening is an effective measure to reduce the cooling load of buildings. In this paper, the cycle coupling simulation strategy of PHOENICS numerical simulation software and EnergyPlus energy consumption prediction software is established, the outdoor temperature and humidity of typical meteorological month are predicted by multiple regression method. The impact of tree characteristics and foundation layout on the thermal environment of the community is analyzed, and the impact of the building cooling load index and residential energy consumption in the neighborhood is evaluated. The results showed that the canopy height increased by 2 m, the temperature decreased by 0.5%, the wind speed decreased by 5.5%, the relative humidity increased by 1%; the leaf area index (LAI) increased by 1, the temperature decreased by 0.4%, 10%, 0.7%. The order of influence on building energy consumption is: layout > crown height > LAI.
Wettability and imbibition mechanism of continental and marine shales by aqueous phase
Authors: Zhang Feng , Li Kuidong , Xiao Jialin , Liu Wei , Hu Yun
Published: August 2020

With regards to the present situations in the exploration of the continental shale of Yanchang formation in Ordos Basin and the marine shale of Longmaxi formation in Sichuan Basin, the characteristics of the interfacial actions between aqueous phase and shale at different positions under different sedimentary environments are studied. The mineral composition analysis, natural porosity observations and rock mechanics tests were conducted. The water phase contacting angle on the shale surface and the spontaneous imbibition of the matrix were explored. The results show that the continental shale has a higher clay mineral content, so it tends to be water-sensitive and consequent damages to the reservoir may be caused. In Fuling area, the matrix of the marine shale gas reservoir is relatively tight, the fracture morphology is simple, the amount of filling material is less, and the micro-fractures and micro-pores are more fully developed than the continental Yanchang formation. Due to the high content of brittle minerals, the Young’s modulus and Poisson’s modulus of the shale in Fuling area are relatively high, which is beneficial to the SRV and the fracture complexity. The surface of shale represents strong hydrophilicity. Differences exist in the wettability effects of water phase on shales at different positions, The effects of different types of surfactants on the wettability of shale are different.
Planning of inter-city transfer networks in Weifang City
Authors: Wang Hong , Cui Dongxu
Published: August 2020

The inter-city passenger flow and travelling patterns in the inter-city transfer networks in Weifang City were explored. Based on prediction of the traffic needs of the network, this study explored the optimization model of inter-city transfer networks and the planning of transfer hubs. The objectives of this study are to optimize the structure of transfer networks and improve the efficiency of inter-city traveling.
Analysis of the influence of traffic control measures on the prevention and control of COVID-19
Authors: Wang Wei , Zhu Zhao , Su Hang
Published: August 2020

Transportation plays an important medium role in the COVID-19 epidemic spread, and correctly understanding this role will help to prevent and control the epidemic spread among different areas. This paper analyzed the process of the COVID-19 epidemic spread through transportation channels at home and abroad, and made a comparative analysis of the epidemic development before and after taking traffic control measures in different countries around the world. After clarifying the role of transportation channels in the epidemic spread, we simulated the epidemic development under different traffic control measures based on the SEIR disease dynamics model. The results show that, without traffic control measures, the peak value of infected people will appear earlier. If strict traffic control measures are taken, the simulated lines of the latent and infected people will almost disappear, and the epidemic will soon stop. Our research results provide a theoretical basis for formulating reasonable traffic control measures.
A Theoretical Review of Vegetation Extraction Methods Based on UAV
Authors: zhaoming Wang
Published: August 2020

At present, with the development of remote sensing technology and UAV technology, high-resolution remote sensing image has become one of the main data sources for vegetation extraction due to its rich texture features and geometric features. How to accurately and quickly extract ground object information from high-resolution images has become a hot topic in computer vision, photogrammetry and GIS research in recent years. At present, it is extremely convenient to acquire high-resolution remote sensing image data, while the extraction of ground object information, especially the vegetation classification and the research on information extraction methods, is relatively backward, which largely depends on the traditional classification methods. This paper summarizes the research progress of remote sensing classification of uav vegetation at home and abroad.
Study on the coupling and coordinated development of tourism economy and ecological environment in Guilin city
Authors: Wang Cong , Wang Rong
Published: August 2020

Correctly figuring out and coordinating the relationship between tourism economy and eco-environment is a crucial issue to approach to regional environmental protection and high-quality tourism development. By introducing an index system, this paper proposes a comprehensive method to evaluate the coupling coordination between tourism economy and eco-environment. The index weight was determined by entropy weight method, and the coupling coordination degree model was established using panel data from 2009 to 2018 in Guilin city. The results present that the overall tourism economic index shows a continuous upward trend, while the eco-environment index had obvious fluctuations; the coupling coordination degree and level continues to grow and had improved from moderate imbalance to primary coordination, respectively. It is trustworthy that there is a bright coupling and coordinated development trend between the tourism economy and the eco-environment in Guilin. With the tourism economy development, an intensive development model dominated by environmental protection and resource conservation should be chosen to promote the coordinated and sustainable development of tourism and the environment.
Research on Treatment Methods and Pollution Control of Construction Wastewater in Hydropower Construction Projects
Authors: Zhao Chunzhe
Published: August 2020

Hydropower construction projects have the characteristics of large construction scale, short construction period, large wastewater discharge and difficult management, and the waters near hydropower stations may be close to environmentally sensitive areas such as scenic spots and historic sites and forest reserves. If construction wastewater is not treated and discharged, it will have great impact on the environment. Based on the engineering analysis of hydropower construction projects, this paper understands that the construction waste water mainly consists of stone aggregate washing waste water and concrete mixing system washing waste water. According to the principle of coagulation and sedimentation and the characteristics of engineering waste water, the construction waste water is treated by physical and chemical methods and combined with coagulation and sedimentation process, so as to reduce or eliminate negative environmental impact, avoid environmental risks and control pollution.
The effects of the disturbance of tourism activities on Rhododendron chrysanthum in Changbai Mountain Reserve
Authors: Jin Hui , Zhao Ying , Chen Qinghong , Jia Xiang , Liu Lijie , Dai Yuhong , Qin Liwu , Zhang Rui , Zhao Yue Ming , Yin Hang
Published: August 2020

The effects of tourism disturbance on the community structure composition and variation of species diversity of Rhododendron chrysanthum population in the alpine tundra of Changbai Mountain were studied to provide reference for better protection of the ecological environment of Changbai Mountain. At different altitudes in the alpine tundra, the regions close to and far from the tourist routes were selected as the study sites, and the typical Rhododendron chrysanthum community in the alpine tundra was selected as the research object. The results showed that tourism disturbance would affect the plant growth of Rhododendron chrysanthum community. The average height, relative coverage and relative density of Rhododendron chrysanthum decreased, leading to the decrease of the important value and dominance of Rhododendron chrysanthum in the whole community. The higher the intensity of tourism disturbance was, the more significant the characteristics of Rhododendron chrysanthum were. In addition, the variation of the biodiversity of Rhododendron chrysanthum community under different tourist disturbance intensity in the middle and low altitude areas of Changbai Mountain alpine tundra was consistent with the theory of “moderate disturbance hypothesis”. At high altitude, Shannon-Wiener species diversity index, Pielou evenness index and Simpson dominance index of Rhododendron chrysanthum community all decreased with the decrease of disturbance intensity. Therefore, in order to achieve a better development of tourism in Changbai Mountain, some measures should be taken to reduce the impact of the disturbance intensity of tourism activities on the plant community in the scenic area.
The Process and Impact of Global Climate Governance: A Case Study of the Paris Climate Agreement
Authors: Qian Xuming , li Jiaxin
Published: August 2020

Global climate governance is a global public good, which has received more and more attention in recent years. Climate governance has three characteristics: multi-level, political and lagging. The paper examines the development process of global climate governance and its existing defects, and analyses the impact of the Paris Agreement on global climate governance. Since the entry into force of the 1992 United Nations Framework Convention on Climate Change, several legal documents have been issued in phases, of which the Paris Agreement is the first major achievement of international climate governance. Although the Paris Agreement adopts the obvious weakness of the model in which the member nations determine their own contribution, it is also a very useful attempt. The effectiveness of the Paris Agreement still depends on the independent contributions of various countries. Therefore, in climate governance, it is necessary to lead countries to actively fulfil their obligations.
The Analysis of the Motivation and Conditions of the “scattered change set” Cargo
Authors: Meng Xiangru
Published: August 2020

Economic progress and the invention of science and technology led to the vigorous development of the transport industry, promoting starch, soybean and other grain and coal and other bulk containers. Transportation can shorten the transportation time, guarantee the quality of goods and reduce the pollution to the environment. The transportation of “scattered change set” shows good development momentum and gradually scale expanded. This paper analyzes the motivation of “scattered change set “, studies the development of” scattered change set “, analyzes the condition of freight, and summarizes the inevitability of the development of “scattered change set “.
Pollution of Microplastics in Coastal Plain of the Huangshui River Basin
Authors: Zhou Sifan , Lin Guoqing , Lin Qiyun , Su Sheng , Cheng Mogeng
Published: August 2020

Marine microplastic pollution is one of the hot spots in current marine environment research. The coastal zone has unique micro-plastic pollution characteristics at the junction of land and sea, and the micro-plastic pollution in the coastal zone soil is still unclear. In this study, Huangshui river basin was selected as the research area in Laizhou Bay, China. Soil samples were collected from the depth of 0-3, 3-6 and 6-9 cm at each location. Microplastics were separated by flotation. Microplastic characteristics were investigated and analyzed by Nile red staining and Fourier infrared spectrometer. The results showed that there was slight microplastic pollution in the coastal plain. 92.9% of the detected microplastics were granular, 6.1% were fibers, and only 1.0% were films. Microplastics with a particle size of 20-100 μm accounted for 57.9% of the total, particles with the size of 100-1000 μm accounted for 38.6%, and particles with the size of 1000-5000 μm accounted for 3.5%. The presence of film-like PE was detected, indicating that microplastic contamination in the soil was likely to come from the utilization and mulching of agricultural mulch. The amount of microplastics in soil was related to the size of microplastics. Abundance of microplastics in soil increased with decreasing of the size of soil. In addition, the microplastic content in soil decreased, and particles with a smaller size occupied a larger proportion, with the increasing of the depth of soil.
Effect of the combination of wetland and sewage treatment technology on the treatment of domestic sewage in Zhejiang province
Authors: Yao Jun Xiao
Published: August 2020

Sample from 25 A2O + horizontal flow constructed wetland (HFCWs) and 49 A2O + vertical flow constructed wetland (VFCWs) in Suzhou, Huzhou, and tested inflow and outflow (COD, NH3-N, TN, TP and SS), to evaluate the stability of the effluent and the rate of compliance. The effects of the two combined processes on the treatment of rural domestic sewage and their design and operation were compared and studied. The results show that the stable effluent compliance rate of A2O + VFCWs is higher than that of A2O + HFCWs. The effluent quality stability of A2O + VFCWs is better in winter, but worse in summer. The removal effect of the A2O unit in the two combined processes is not ideal, which may be related to the low carbon to nitrogen ratio of the influent and less sludge. Based on the above results, it is recommended that the county-level city proceed with upgrading and reconstruction in terms of structure and operation.
The relationship between sponge and water environment management in sponge city construction
Authors: Zhou Jinchao
Published: August 2020

Water resources are indispensable and substitute important ecological environmental resources in the process of sustainable development of human economy and society. At present, the shortage of water resources has gradually become an important bottleneck restricting the rapid and healthy development of our society and economy. Therefore, it remains of great practical significance to effectively protect and standardize the scientific management of China’s water resources. However, in contemporary theories of ecological environmental resources protection, due to the serious waste of water resources at present, the content needed for the effective protection of ecological environment water resources is also relatively large. In this study, the strategic concept of ecological environment management in sponge city is introduced for the effectual protection of ecological environment water resources and ecological environment management. This concept is one of the most significant ecological protection theories since the concept of water resources protection and ecological environment conservation management was formally born, and it can also be said to be the theme and basis of this research paper. I just hope the discussion of this paper can bring some help to readers.
Design and Application of Environmental Housekeeper System in Highway Engineering
Authors: Hongbo Xie , Yuehua Yang , Fangcheng Huang , Dong Zhang , Zhaoming Wang
Published: August 2020

Under the context of the rapid development of green highway construction, it proposed that “green” control is the key to the construction of green highway. In this study, the authors are taking the west freeway around in Hangzhou as the study area. According to characteristics of highway construction and the existing environmental problems, the authors are taking the environmental supervision of highway construction as the research content. They studied the model of environmental housekeeper, and developed the platform.
Characteristics and genesis of carbonate rocks’ hydrothermal dissolution in Laiwu Basin, Shandong Province, China
Authors: Yuanqing Liu , Le Zhou , Wei Li , Lin Lv , Xuemei Ma , Yidi Zheng , Shunxiang Meng , Qijun Deng
Published: August 2020

Through analysing the chemical composition of rock samples, investigating of hydrogeological points and hydrothermal dissolution geological points, the characteristics and mechanism of hydrothermal dissolution in Laiwu Basin were studied. The results show that the high temperature and high pressure magma intrusions resulted in hydrothermal metamorphic marbling of carbonate rocks in the contact zone. Hydrothermal fluids migrating along permeable faults, fractures can cause acidic hydrothermal dissolution and mixed dissolution in carbonate formation and formed dissolution cavities of different scales. The cavities are constituting groundwater enrichment space at present.
The Variation Characteristics of Temperature in Barrow Alaska During 1925-2018
Authors: Liu Zhaoyu
Published: August 2020

By using the Mann - Kendall mutation test, Morlet wavelet analysis, correlation analysis, linear trend regression methods, the variation of temperature in Barrow, from the Barrow Airport monthly temperature data, is analyzed during 1925-2018. The whole tendency of annual change of temperature in 94 years is rising, with the trend approximately 2.8°C/100 a. Before 1976, the mean annual temperature fluctuated downward, and after that, it showed an obvious upward trend nearly 9.3°C/100a, which indicated that Barrow experienced a process from cooling to rapid warming. Winter showed the most significant increasing trend among four seasons, with the average rate 4.27°C/100a, which is more than three times as high as that in summer (1.38°C/100a), right corresponding to the characteristic of Arctic amplification. The mutation of mean annual temperature occurred around 2005, and the value of temperature existed in a primary period of 15 years and a sub-cycle of quasi-8, quasi-28 years. At the end, great debates about the truth of temperature rising, mechanisms of Arctic amplification and the effect of it are demonstrated. The relevant conclusions are of reference value to the trend of temperature change in Arctic area and to the comprehension of Arctic amplification and global warming.
Pilot handle valve automatic test bench
Authors: Song Wen Tao , Jin Jian , Li Xing Ke
Published: August 2020

In order to test the performance of the pilot handle valve, the test system of the pilot handle valve is developed with LabVIEW measurement and control software, motion control card and XYZ three-axis servo motor. The oil contamination in the valve body is detected when testing the pilot handle valve. In view of the phenomenon that the flow is small and it is difficult to measure accurately when testing the pilot handle valve, the industrial camera is used for image processing and analysis of the leakage. Finally, the reliability of the test system is verified by theoretical analysis and experiment, which meets the requirements of the test-bed company and is accepted successfully.
Research on New Scheme of Electric Chassis Vehicle for Switchgear Breaker Handcart
Authors: Xiao Zhi-yuan , Liu Zhang-lei , Wu Xu-Dong , Chen Gong , Chen Jia , Yuan Pei
Published: August 2020

The electric chassis vehicle as a swing-in and swing-out unit of a 10kV centrally installed switchgear vacuum circuit breaker plays a vital role. This article introduces an electric chassis vehicle for 10kV centrally installed switchgear. This electric chassis has all the interlocking functions of the traditional chassis vehicle, and adopts high-precision ball screw, modular integral reduction motor and gear transmission, and the clutch is at the front of the beam. The bottom of the chassis is equipped with guide bearings, which are used in conjunction with special guide plates. This electric mechanism has the characteristics of high precision, low noise, smooth operation, and operation of electric and manual without manual switching, which can be directly operated. This technology can reliably improve the comprehensive technologies such as the reliability and mechanical life of electric chassis vehicle, and improve the reliability of the existing switchgear sequence control operation technology, making it possible to apply one-key sequence control operation, reducing the amount of personnel on-site operation workload and improving operation and maintenance efficiency, and reduce personal safety risks.
Optimal market trading strategy of load aggregator based on comprehensive demand response
Authors: Xu Nan , Wang Linfeng , Zhou Bo , Zhao Zihao , Nie Jing
Published: August 2020

With the development of smart grids, load aggregators can aggregate users’ responsive loads through advanced measurement equipment and communication networks to achieve demand response. Establish an integrated demand response (IDR) model in the electric-gas-heat multi-energy day-to-day market model, and then take the LA profit as the optimization goal to study the IDR-based electric-gas-heat optimal joint trading strategy. Through the comparative analysis of the traditional demand response (DR) and the proposed multi-energy market IDR model, it is verified that the proposed multi-energy market IDR model is not only conducive to improving the market profit of LA, but also can meet the multiple loads through the mutual assistance of multiple energy peaks and valleys demand.
Transducer and Testing Scheme Design of Phased Array Ultrasonic Detection for Wind Turbine Main Shaft in Service
Authors: Xu Zhengbin
Published: August 2020

The wind main shaft is the important component for connecting the hub and gearbox, transmitting axial thrust and rotating torque in a high-power wind turbine. Defects of structural damage occur more often in the main shaft bearing constraints front end surface based on the previous study. New type of phased array ultrasonic testing technology is used for the first time, and the theoretical design is dedicated to the wind main shaft detection of phased array ultrasonic testing customized transducer and scheme. A suitable transducer parameter range and detection scheme are determined well.
Phase Identification of Low-Voltage Users with Novel Grey Relational Analysis Method
Authors: Zhao Guowei , Zhao Rui , Gu Yuanjie , Chang Bo , Hu Changlong , Xue Yang
Published: August 2020

With the development of smart grid, the extensive use of advanced metering infrastructure (AMI) equipment further improves the lean management level of grid, which makes it possible to accurately analyse the power consumption information of low-voltage users. This paper proposes a novel algorithm for accurately identifying the phase of low voltage users. The algorithm is based on grey relational analysis (GRA). Data collected from independent users and buses are used for comparative analysis by proposed algorithm. In this paper, the algorithm and its experimental results in Hebei Province are introduced in detail. The results show encouraging results that the proposed algorithm can accurately identify the low-voltage users’ electricity phase, and the performance of the improved GRA algorithm is better than the traditional GRA. The proposed method also has better effect compared with other methods of phase identification.
Vibration Responses of SCR with the Installation of Monitoring Devices
Authors: Zhou Yisu , Zhang Long , Zhuang Ye , Li Jiaqi
Published: August 2020

In order to ensure the integrity and safety of deepwater risers during the development of deepwater oil and gas fields, the on-site monitoring technology of risers has become a research hot point in the field of marine engineering. Riser monitoring devices have large quality, which will change the vibration responses in practical engineering. In this paper, the vibration modality of a steel catenary riser (SCR) with monitoring devices is simulated in time domain using professional marine software Orcaflex, including static, dynamic and strength characteristics of SCR and is based on catenary method and centralized mass method. The effects of SCR vibration with and without monitoring devices are compared and analysed on the static characteristics, dynamic characteristics and strength.
Experimental Determination of Moisture Diffusivity of Birch
Authors: He Xiao , Wang Lianjun
Published: August 2020

Birch is one of the renewable biomass resources. The high moisture content of raw materials increases the cost of transportation and pelletization. Drying is an effective approach to reduce the moisture content of biomass before storage and other operations to a safe and manageable level. Moisture diffusion in wood could affect the drying process significantly. In this study, the drying process of Birch materials was modeled by Fick’s second law. Results from the experiment were utilized to determine the moisture diffusivity with parameter estimation. It showed that the diffusion coefficients of Birch increased from 1.2×10-7 to 9.6×10-7 m2 h-1 with the temperature ranging of 20-60°C. The trend of moisture diffusion coefficients followed Arrhenius equation with respect to temperature. For high-temperature drying, this model can help to terminate the drying process in a timely manner, thus conserving energy consumption.