bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the Training Program and Develop the Curriculum System for HVDC Equipment Maintainer
Authors: Pei Ying , Niu Lin , Liu Junjie , Gao Nannan , Wang Lei , Li Pei , Yin Qinghua , Wang Lulu 
Published: July 2020

Abstract
It has a complicated system wiring, a large variety of equipment, and high operation and maintenance technology requirements in the high-voltage direct current (HVDC) converter station. So the higher requirements on the technical skills will be put forward for the operation and maintenance personnel working in the (HVDC) converter station. It analyzes the training needs of HVDC equipment maintenance personnel systematically, researches on the training program deeply, and designs the course contents carefully in this paper. The results will play a positive role in the cultivation of HVDC technical staff.
Research on Deleveraging of New Energy Enterprises and Risk-taking of Enterprises
Authors: Juan Wang 
Published: July 2020

AbstractIn the passing years, thanks to the support of the state and the government, the new energy industry has advanced in leaps and bounds and thus become a vital supporting force for China’s economic growth. The rapid growth of new energy enterprises requires a large amount of financial support, and debt financing is its inevitable choice. In the context of deleveraging of non-financial enterprises, does deleveraging of new energy enterprises exert an impact on corporate risk-taking? With A-share new energy listed companies from 2011 to 2018 as research samples, this thesis analyzes the impact of debt scale changes on corporate risk-taking from three perspectives: the overall debt level, the degree of deleveraging and the degree of deleveraging of bank loans. The results turn out that the asset-liability ratio significantly increases corporate risk-taking, the degree of deleveraging significantly reduces corporate risk-taking, while the deleveraging of bank loans reduces corporate risk-taking. Analysis of the impact of deleveraging of new energy enterprises on corporate risk-taking is conducive to clarifying the extent of the impact of deleveraging policy on investment willingness of new energy enterprises, thus providing theoretical basis for formulation and implementation of policies.
Research and Application of Multi-energy Complementary Comprehensive Energy Distributed Measurement and Control System
Authors: Wei Dajun , Zhang Yuanpeng , Li Junen , Yuan Shuai , Geng Yujie , Cheng Yan , Yu Peng , Wang Yuejiao , Teng Wei 
Published: July 2020

Abstract
Multi-energy complementary integrated energy system has the problems of complex equipment operation, incomplete operation data monitoring and multi-time scale characteristics. In order to solve these problems, the operation state data of power, gas, cooling, heating network and distributed power supply as well as the operation state parameters of various networking energy consumption equipment at the load side were collected and monitored. This paper was optimized the system data collection and transmission method through multi-time scale data modeling and ultra-lightweight stream encryption algorithm, and the system operation multi-index evaluation system was constructed from three aspects of economy, technology and environmental protection. In this paper, the rationality and reliability of the scheme of stream encryption and the method of multi-index comprehensive evaluation were verified through the analysis of application examples. From multiple time scales, the system can monitor and control the change of heterogeneous energy stream, such as cooling, heating and electricity, and also can realize the high reliability data acquisition and real-time communication of multi-energy stream. It provided a data source for the real-time scheduling and control decision-making of the follow-up integrated energy system.
Energy Efficiency Optimization Management for Industrial Enterprises with Electric Vehicle Charging Stations
Authors: Yuan Jiang , Hao Tian 
Published: July 2020

Abstract
Most industrial enterprises only have extensive production mode and lack of certain economy. Combined with the characteristics of renewable energy power generation system and electric vehicles, a mathematical model of electric vehicles with wind power and photovoltaic power generation station was firstly built, and then an industrial enterprise energy efficiency optimization management model with electric vehicles charging station was built on this model. Improved adaptive genetic optimization algorithm is programmed based on MATLAB 7.0. Then taking a certain system as an object, we optimize the energy efficiency of industrial enterprises in 5 typical scenarios. The results show that the reasonable utilization of renewable energy power generation and electric vehicle charging load can significantly improve the energy efficiency of industrial enterprises.
Active and reactive power joint optimization of active distribution network under new energy access
Authors: Wei Wei , Jiangbin Zhang , Zhao Yang , Zihan Ma 
Published: July 2020

Abstract
The access of large-scale distributed generation (DG) to the active distribution network has a great influence on the power flow, node voltage and network loss of the distribution network. In this paper, in order to improve the operation level and economic performance of the active distribution network, the distributed power supply reactive power output and load reduction are used as control variables to establish a multi-objective optimization model with the total network loss, voltage deviation and load reduction cost as the objective function. The voltage of each node, system network loss, load reduction cost and their corresponding control variables are calculated by improved simulated annealing multi-objective particle swarm optimization algorithm. Finally, the IEEE33 node system is used for example verification, the results show that the mathematical model can achieve coordinated control of voltage, reduce network loss and meet the requirements of actual power grid operation.
Comprehensive utilization of waste heat produced by fuel cell on manned space process
Authors: Wen Chen , Qu Xi , Bai Jingying , Feng Lei , Wang Nan , Cui Qingxin , Xie Wen 
Published: July 2020

Abstract
In order to solve the problem of large amount of waste heat generated by aerospace fuel cells and improve the comprehensive energy utilization efficiency of fuel cells, the proposes of a comprehensive utilization plan of fuel cell waste heat for the working conditions involved in manned spaceflight, including gas preheating, system insulation and microorganisms were designed in this paper. The waste heat were proposed to be used in cultivation, plant cultivation, urinary treatment of ring hole bio-protection system, harmful gas and carbon dioxide removal, and the construction of heat utilization methods and processes. Combined with high-efficiency phase change material heat storage, a comprehensive utilization method of fuel cell waste heat were designed. The comprehensive utilization of waste heat provides an effective path for optimizing the spacecraft system for improving the comprehensive utilization efficiency of fuel cells.
Inertia and Damping Analysis of Grid-side DC/AC Inverter Control Strategy for Direct-drive Wind Turbine
Authors: Li Ding , Liu Yili , Li Mingxian , Li Meiding , Ma Xiaoyan 
Published: July 2020

Abstract
With the large-scale connection of direct-drive wind turbine (WT) to the power grid, the proportion of installed capacity and rotational inertia of traditional power grids have been reduced, and the dynamic support capacity of the power grid has been relatively weakened, which increase the difficulty of system inertia effect control and steady-state mechanism analysis. In this paper, a DC voltage droop control strategy under high-frequency components is proposed. This control method can play a positive role in reducing the grid frequency deviation and to promoting the analysis of the rate of change of frequency. Firstly, a static synchronous generator (SSG) mathematical model of a wind power system is established by analogy to the dynamic analysis theory and method under the traditional electromechanical time scale. Secondly, from the perspective of DC-voltage timescale (DVT) dynamic characteristics analysis and control, the inertia, damping and synchronization effects of the WT are studied, and the mathematical expressions of the system equivalent parameters are derived. Finally, through the comparison between conventional droop control and high-frequency component droop control, the advantages and disadvantages can be obtained, subsequently, the effectiveness of the high-frequency droop control on the DC side and the correctness of the analysis conclusion can be verified through simulation.
Optical Image Damage Detection Technology Based on Convolutional Neural Networks
Authors: Wang Y , Yu M , Zhong S , Wang L , Xu M 
Published: July 2020

Abstract
In the daily work of technical defense of universities, many optical devices need to be managed, and there are many components that are easily damaged in these devices. Therefore, timely detection of component damage in optical equipment is of great significance for reducing equipment losses and improving work efficiency. The traditional detection method is to use professional equipment for testing after removing the equipment. In this way, for the technical defense work of universities, the real-time online of the equipment cannot be guaranteed and the use cost of the equipment will increase. In the field of computer vision, deep learning and convolutional neural network technology have begun to play an important role with the wave of artificial intelligence. Therefore, this subject attempts to apply this technology to the damage detection of technical defense equipment in universities, thereby improving work efficiency and reducing equipment loss.
Research and Application of Power Terminal Communication Access System Based on Heterogeneous Network Technology
Authors: Huan Li , Feng Sun , Lishuai He , Bin Lu , Dongdong Wang , Fanbo Meng , Wenjia Zhu , Chuanbo Liu , Qiang Zhu , Nan Li , Wenxiao Zhang , Dongfang Zhang , Bolong Wang 
Published: July 2020

Abstract
In recent years, the basic business of power distribution production, such as distribution automation, power consumption information collection and load control, distributed power supply and so on, is growing rapidly, and the demand for power terminal communication access is increasing. Based on the analysis and research of terminal communication access technology, this paper proposes a heterogeneous network combination scheme which integrates multiple terminal communication technologies to solve the problems such as the limitation of existing terminal communication access network technology on the power distribution side. Heterogeneous network networking technology realizes the integration application of wireless private network, low-power wide area network, medium voltage broadband carrier and other channels. It can give full play to the advantages of various communication modes, improve the communication guarantee ability, meet the requirements of full coverage of power terminal communication access network business, provide strong channel support for terminal information return, and provide communication system construction for distribution terminal Useful reference.
Design of Multi-Functional Lighting System Based on Solar Power
Authors: Zhihong Xiao 
Published: July 2020

Abstract
This paper introduces the multi-functional lighting system which is a national undergraduate innovation training program. In view of the increasing energy shortage and environmental pollution, a multi-functional lighting system powered by solar energy is designed by project team members. In addition to the lighting function, the system also has killing insect and counting functions on some special occasions. This system uses STC90C516 as the control center, uses infrared diffuse reflection photoelectric switch and infrared human body sensor as the counting sensor, multi-color LED array as the lighting device, using the phototaxis of pests to attract pests and kill them with high-voltage power grid. The results show that the system is energy-saving, environmental friendly, accurate in counting, and has good insecticidal effect on many kinds of pests.
Prediction and Assessment of Rainstorm Flooding Disasters Risk in Shanghai Metropolitan Area in 2050
Authors: Song Yuanzhen , Zhu Ziming , Qin Menglin 
Published: July 2020

Abstract
Based on the theory of natural disaster risk, considering the natural environment and socioeconomic status comprehensively, with a target year of 2050, a risk assessment system and method for rainstorm flooding disasters risk in the Shanghai metropolitan area is constructed, and a division map of disaster risk is drawn. The results show that the regional differences in the risk of rainstorm flooding disasters in the Shanghai metropolitan area in 2050 are obvious. Hangzhou, Nantong, Ningbo, and Zhoushan in the east are high-risk areas of rainstorm flooding disasters. The medium-risk areas are mainly Shanghai, Huzhou, Changzhou, Wuxi, Jiaxing and other places. Suzhou, Jiaxing, Shaoxing and other places have lower risk indexes.
Discussion on the Application of Demand Analysis to Guide the PPP Model to Cross-regional Water Markets
Authors: Lijun Liu , Yijia Wang 
Published: July 2020

Abstract
There are successful and failure cases of PPP financing model projects in China. Combined with the respective interests of the two main participants of the PPP project, the government and social capital, the application analysis of the PPP model in China’s infrastructure sector put forward the view that demand analysis plays a key role in the success or failure of the PPP project. Based on this, combined with the characteristics of infrastructure, the characteristics and production of infrastructure rigid demand and elastic demand are briefly analyzed. The typical basic resources of water resources are taken as examples to analyze the rigid demand and elastic demand of water resources,and how to analyze the demand analysis of PPP projects, and explore them in cross-regional water markets.
Research on Combined Strategy of Cultural Heritage Conservation in Lingnan Impression Park
Authors: Wen Yifeng 
Published: July 2020

Abstract
This paper takes Lingnan Impression Park as case study to research on integrated strategies of cultural heritage conservation and reuse which combined three modes: 1) original site protection, 2) relocation and reconstruction, 3) new archaism architecture. Those modes of building with different attributions jointly constitute the Lingnan Impression Park displaying the traditional Lingnan (Cantonese) culture and atmosphere, making lingnan Impression Park as an attractive cultural tourism and suburban leisure destination, which has great significance for research on heritage conservation cooperated with tourism development.
Predicaments and Landscape Changes in Traditional Village Transformational Development - A Case Study of Chongqing, China
Authors: Zhang Jing 
Published: July 2020

Abstract
The protection of traditional villages plays an important role in the strategy of inheriting Chinese outstanding history and culture, and it is also an important type for the transformation and development of traditional farming civilization to modern ecological civilization. In this paper, it is held that, currently, traditional village transformation and development follow the laws of policy orientation attracting capital intervention, capital intervention promoting village development, and village development supporting policy orientation in turn with actual internal forces, realizing a ternary integrated development path for the country, market, and village. Based on the logic inference and deduction on the three-dimensional path driven by departmental policy capital, urban industrial and commercial capital as well as rural community and owned capital, a series of typical cases of Chongqing are selected for demonstration. Studies show: (1) At this stage, traditional village transformation and development will inevitably be driven by both internal and external forces, since the driving power of one single force is limited. Only by conforming to external driving forces such as policies and capital and internal endowments of village resources, culture and economic foundation, can the predicament in traditional village transformation and development be overcome; (2) The key to realizing rural transformation and development lies in stimulating internal driving forces of villages. Economic reconstruction with industry cultivation as its core is the most active factor in rural development, and it plays a leading role in social and landscape reconstruction; (3) Historical rural landscape is an important resource for the transformation and development of villages. Therefore, both macro policies and regulations and capital intervention should be based on a full understanding of the value of historical landscape, and a thorough and true cognition and evaluation on the composition and characteristics of historical landscape.
Study on the evaluation and countermeasures of ecosystem status of Guangzhou
Authors: Zhang Yinbo , Liu Xucheng , Liu Xianghua , Yang Kun , Zhou Wen , Wang Xiuming 
Published: July 2020

Abstract
It is the first time that we constructs the evaluation index system of Guangzhou’s ecosystem status from three aspects of ecological resources, ecological structure and ecological quality, analyzes the historical change characteristics of Guangzhou’s ecosystem status in the past 11 years and the ecosystem status of 11 districts. Due to the decrease of ecological land area and the continuous increase of construction land area, the evaluation scores of ecosystem status in Guangzhou have declined in recent years, and the differences of ecosystem status in 11 districts are also obvious. Guangzhou will promote the regional ecological environment and further carry forward the construction of ecological civilization through various methods, such as strengthening the protection of natural ecological environment, stepping up the supervision of ecological environment, etc.
Research on the Evaluation of the Input and Output Efficiency of Three Industries in Qinghai Province
Authors: Yafei Liu , Shengxi Ding 
Published: July 2020

Abstract
Since the western development, the investment in science and technology in Qinghai Province, the input of scientific and technological personnel, and the expenditure on new product development of large and medium-sized enterprises have continued to increase; the amount of patent output and the turnover of technology contracts in the output of science and technology have steadily increased, and new product sales Income fluctuations have risen, but there is a clear gap with Shaanxi and Gansu in the west. An analysis of the three industrial capital inputs and scientific and technological personnel inputs in Qinghai Province, and an evaluation of the efficiency of scientific and technological input and output, found that there are the following aspects of the technological input and output efficiency of various industries in Qinghai. Problems: insufficient scientific and technological input; lack of scientific and technological talents and inefficient coexistence of talent output; co-existence of growth in three industrial inputs and decline in scientific and technological output; misalignment of scientific and technological resource allocation and low level of scientific and technological management. Proposed the establishment of a stable growth mechanism for scientific and technological inputs; Strengthening the introduction of talents and improving the mechanism of selecting, educating and employing people; optimizing the combination of scientific and technological investment structure and adjusting and optimizing the industrial structure; accelerating the transformation of scientific and technological achievements to realistic productivity and other measures to promote the efficiency of scientific and technological innovation and achieve high-quality development in Qinghai Province.
Analysis of key points and corresponding effects of the construction of water-saving institutions
Authors: CaiXia Jin 
Published: July 2020

Abstract
The construction of water-saving institutions is an important part of the implementation of the priority policy of water-saving. In view of the current situation of the construction of water-saving institutions in Zhejiang province, the main problems in the constructions were summarized, and the key points of the constructions were put forward, which is of important reference significance to construct the water saving institutions. The main progress and experience was introduced and the water saving effect was analysed based an application case, which has a promising future for application.
Study of sustainable development in Yongkang city based on environmental capacity and pollutant control
Authors: Fu Lei , Wang Junmin , Jin Qiannan , You Aiju 
Published: July 2020

Abstract
Over the past centuries, due to the improvement of the understanding of the natural environment and social service function of rivers, many countries have started the research and practice of water environment protection. China also paid most of its attentions to the water environment in most of its cities and towns. Systematic calculation and analysis of the water environment status becomes famous in most of Chinese regions, which not only shows the current status of water environment protection in China but also indicates the methods to reduce the domestic pollution. In this study, Yongkang city is selected as a typical Chinese city, COD(Chemical Oxygen Demand) and NH3-N(Ammonia Nitrogen) are considered as two typical pollutants, both water environmental capacity and current pollution are calculated. The environmental bearing capacity coefficient is utilized to show the current status of pollution level. The comparison and analysis between the water environmental capacity and current pollution shows a good water quality status in Yongkang city. This study is also able to further improve the water quality and social development in Yongkang city in the future.
Analysis on the Policy Mechanism and Optimization of Green Technology Innovation in Manufacturing Industry—Based on the Data of Listed Companies in the New Energy Vehicle Industry
Authors: Lin Qiuman , Liu Qin 
Published: July 2020

Abstract
Government policy is an important means to promote green technology innovation in enterprises. However, scholars are unsure whether government policy can achieve the expected results. This paper selects new energy automobile companies as the research object, collects relevant data of 28 listed companies in this field for nearly 10 years, and uses panel threshold models to empirically test the impact of environmental regulations and government subsidies on corporate green technology innovation. Research shows that environmental regulation can significantly promote green technology innovation. When the intensity of environmental regulations is appropriate, government subsidies can achieve the best drive for green technology innovation. This article reveals the influencing factors and mechanism of corporate green technology innovation from a micro perspective, providing a scientific basis for optimizing government policies and promoting the green development of Chinese manufacturing.