bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Research on comprehensive benefit Evaluation model of pumped storage power station based on improved G1-entropy weight method
Authors: Zhao Haiji , Wu Keming , Sun Mingze , Lv Changlin , Hou Kaiyuan , Peng Yongming 
Published: February 2021

Abstract
In this paper, the comprehensive benefit evaluation index system of pumped storage power station will be established from four aspects: operation effect, functional benefit, financial benefit and environmental benefit. The improved sequence relationship analysis method will be combined with entropy weight method, and TOPSIS will be used to establish comprehensive evaluation model to quantitatively evaluate the comprehensive benefit of pumped storage power station in the power system. Then, through the analysis of the results of typical case studies, it is concluded that the index to be strengthened and the index that has reached the standard for power station, which is convenient for targeted measures to improve the comprehensive benefits of the power station in the future.
Aggregation of Typical Diurnal Curves of Regional Distribution Based on FCM Algorithm
Authors: Liang Chao , Su Jinsheng , Zhao Hui , Zhao Dewei , Yang Jing , Liu Dunnan , Wang Lingxiang 
Published: February 2021

Abstract
In order to solve the influence of renewable energy output instability on distribution network planning and power contract decomposition, this paper proposes a typical daily curve aggregation method based on FCM algorithm for regional distribution of power types. In this paper, several kinds of polymerization optimization algorithms are compared and analysed. Then the calculation method of curve polymerization was designed based on the principle of FCM. Finally, the monthly photovoltaic power plant output curve of region A is aggregated by FCM algorithm to obtain the typical daily curve of that month. The results show that the power curve formation method proposed in this paper meets the planning demand of region A to the greatest extent and provides an effective technical means for curve decomposition.
Prospect of Typical Application of Integrated Energy System
Authors: Zhang Haijing , Wang Weishuai , Zhu Lingkai , Sun Zhuoxin , Ma Decao , Chen Wenjiao 
Published: February 2021

Abstract
Integrated energy system can break the pattern of unconnected and independent between traditional energy systems, which is of great significance in realizing the integration of multiple energy sources and promoting the efficient utilization of energy. This paper first introduces the concept of integrated energy system, and then according to the characteristics of integrated energy system in planning, design and operation optimization, summarizes the three-level application scenarios applicable to different spatial scales, and introduces some typical application scenarios in detail. At the same time, according to the existing integrated energy system demonstration projects, the application theory of specific scenarios is extended. Finally, combined with the national conditions and energy development status of China, the problems and development direction of the future development of the integrated energy system are proposed, and some suggestions and ideas are given for the energy utilization and planning and design, so as to provide reference for the follow-up research.
Review on the Superhydrophilic coating of Electric insulator
Authors: Guo Kai , Jiang Bo , Zhao Peng , Wu Yaping , Tian Shuang , Gao Zhiyue , Zong Lijun , Yao Shuo 
Published: February 2021

Abstract
In recent years, new preparation technologies of ultra-hydrophilic TiO2 films have emerged in an endless stream, such as spray pyrolysis, electrostatic spinning, spray printing, micro-arc oxidation, pulsed laser deposition, atomic force deposition, ion beam deposition, etc. These new preparation technologies are able to control the surface chemical composition and surface structure of the thin film more precisely and to prepare the ideal superhydrophilic TiO2 coating. Among them, the rf sputtering method has important research significance for the repair and maintenance of TiO2/SiO2 composite coating. Nano TiO2 has excellent photocatalytic activity and superhydrophilicity, making it an important material for the preparation of high self-cleaning superhydrophilic coatings. However, the application of TiO2 photocatalysis requires UV light, and there is less than 5% UV light in sunlight, so the application of TiO2 photocatalytic performance is greatly limited. In addition, the surface hydrophilicity of TiO2 under light also has great problems. Therefore, improving the surface hydrophilic durability of TiO2 has become a key research point.
Evolution of Solar Photovoltaic Policies and Industry in China
Authors: Zhang Yueqi , Xie Pengcheng , Huang Ying , Liao Cuiping , Zhao Daiqing 
Published: February 2021

Abstract
China has experienced a rapid growth of both SPV manufacturing capacity and installed capacity in the last twenty-five years. However, this growth has followed a very erratic path. This study identifies policies issued through this period for a closer look on the impact of these policies to the solar photovoltaic (SPV) industry development in China. This paper examines five stages in China’s SPV policy from mid-1990s to 2019. Each stage has implemented different combinations of policy program. These changes in government policy and the effects to the SPV sector are attributed to three main sets of variables. First and foremost, the events that influence the policy and strategy priorities of Chinese government. Secondary factors include the government’s poor management of the policy impacts to the SPV manufacturing industry and the domestic SPV market at early days, as well as policymaking and problems coping within government. The subsidy, FIT policies and other programs had stimulated the deployment of SPV in a large scale but brings several problems such as subsidy reliance. The fundamental measure to improve SPV development into a grid parity era is the technological advancement of photovoltaic in efficiency and manufacturing.
Research on Surface Defect Detection of Solar Pv Panels Based on Pre-Training Network and Feature Fusion
Authors: Li Huohua , Fu Xiaogang , Huang Tairu 
Published: February 2021

Abstract
Aiming at the problems of the lack of sample size and the complexity of defect images in defect detection task, based on the idea of transfer learning and hierarchical feature fusion, this paper proposes a deep classification network model of improved vgg19 pre-training network by analyzing the basic principle of feature extraction of convolutional neural network and getting inspiration from feature pyramid network. Then, the model is trained by the small-scale defect images of solar pv panel. Finally, the solar pv panel data set containing four kinds of defects, including cracks, debris, broken gates and black areas, is selected to comprehensively verify the effectiveness of the improved network in the defect detection task. The experimental results show that the proposed method is superior to the classical vgg19 network model in four evaluation indexes, such as accuracy, precision, recall rate and F1 score.
A multi-task learning framework for multi-location short-term load prediction
Authors: Meng Zhaorui , Sun Jinhua 
Published: February 2021

Abstract
Short-term power load prediction is crucial to management of power system. The traditional load prediction methods are based on learning data from single location. However, load consumption is related among different locations. In this paper, we propose a novel approach to train load predictors for multi-locations in a collaborative way based on multi-task learning. Specifically, the load predictor in each location is splitted into two parts: a general one and a location-specific one. The general predictor is to capture information shared by various locations. And the location-specific predictor is to obtain location-specific information. In addition, a location similarity graph is built and incorporated into the model as regularization. Extensive experiment result shows that our approach outperformed single task learning method and another two multi-task learning methods in at least 80% of locations.
Urban integrated energy demand forecasting method considering multi-station fusion
Authors: Wu Haoyu , Ma Jiaxin , Zhang Chunyan , Zhou Hua , Bian Shimin , Zeng Ming 
Published: February 2021

Abstract
Under the background of energy reform, China’s energy-related industries actively innovate from the top to the bottom, vigorously promote the “Internet + Energy” strategy, and promote multi-station integration to deeply integrate energy, information communication and other pillar industries of the national economy to help China’s industrial upgrading and economic development. This paper proposes a method for forecasting urban comprehensive energy supply and demand that considers multi-station integration. Through the prediction and analysis of energy supply and demand under various scenarios of multi-station fusion, the comprehensive energy design scheme under different types of multi-station fusion scenarios is clarified to assist the early development of market developers and provide decision support for the promotion and application of comprehensive energy technology facing multi-station fusion.
Measurement of Noise Emission Level at Substation Boundary Based on Coherent Power
Authors: Li Linyong , Li Li , Li Duanjiao , Xiao Guofeng , Lin Qixiong , Fan Xiaopeng , Zou Zhuanglei , Peng Lei 
Published: February 2021

Abstract
According to the Chinese standard of GB 12348-2008, to determine the noise emission level at substation boundary, the noise level of substation boundary and the background should be measured separately. Then correct noise level at substation boundary utilizing measured background noise. However, the measured background noise is inaccurate due to the different acoustic environment. Therefore, the noise emission level at substation boundary applying this method often has a certain error. This paper proposes a method for separating transformer noise to calculate the noise emission level of transformers based on coherent power, which avoids the error caused by the inaccurate measurement of background noise.
Design of Reciprocating Wave Power Generation System
Authors: Ding Nan , Yang Junda , Cheng Hanxiang , Dai Qiangqin 
Published: February 2021

Abstract
The world’s energy structure, the main energy used by mankind is still oil, natural gas and coal and other non renewable resources. Therefore, renewable energy has a huge development prospect. Wave energy is a renewable energy with a high density. The system mainly depends on the wave energy in the ocean and provides a reciprocating wave power generation system. The influence of sea state on the dynamic characteristics of power tools is analyzed by using the knowledge of dynamics. The mechanical analysis of crank and connecting rod is carried out to understand its vibration characteristics, which provides necessary theoretical basis for power tools such as wave power generation system.
Research on the application of the frequency-phase controlled AC withstand technology in GIS
Authors: Zhang Peng , Liang Jianquan , Wang Yue , Zhang Dewen , Sun Wei , Zhang Jian 
Published: February 2021

Abstract
Gas insulated SWITCHGEAR has been widely used in modern power grid with increasingly tight land use due to its advantages such as small floor space, high integration, strong security, high reliability and small maintenance workload. For the extended high-voltage GIS equipment, field insulation AC voltage withstand test must be carried out before operation to verify whether the equipment is ready for operation. In the withstand voltage test, considering the possible breakdown of the original equipment during the withstand voltage between the tested, the original equipment must be cut off and grounded. However, with the continuous improvement of the reliability requirements of power supply, the power failure will cause great economic and political losses, which requires a technology that does not require the GIS bus to stop completely, namely frequency-phase controlled AC withstand test technology. In this paper, the test principle of the frequency-phase controlled AC withstand test technology is first analyzed, and then the test process of the frequency-phase controlled AC withstand technology is illustrated by an example, which provides a reliable scheme for the field test of GIS maintenance or expansion interval.
Influence of basalt fiber on mechanical properties of permeable cement stabilized macadam base
Authors: Li Chungang , Zhou Heng , Guo Chunmei 
Published: February 2021

Abstract
Different groups of permeable cement stabilized macadam specimens material test, which used different basalt fiber content were carried out, studying the influence of basalt fiber content on compressive strength and splitting strength of materials. The results showed that basalt fiber can improve the long term compressive strength and splitting strength of permeable cement stabilized macadam. When the basalt fiber content is 0.7 ‰ and the fiber length is 12 cm, the compressive strength and splitting strength of the specimen are improved best.
A novel optimization method based on interlayer equilibrium displacement for heterogeneous reservoir with high efficiency
Authors: Han Fengyang , Wang Min , Sun Hongxia , Tan Baoguo , Yao Yumin , Liu Zhifeng , Shi Anfeng , Wang Xiaohong 
Published: February 2021

Abstract
In order to formulate the optimal control scheme of injection and production rates for heterogeneous reservoir scientifically and effectively, so as to realize the efficient development of heterogeneous reservoirs, a production optimization method based on interlayer equilibrium displacement for heterogeneous reservoir is proposed. The proposed method decomposes the origin production optimization problem into multiple easy-to-solve sub-problems. Solving the sub-problems can obtain the approximate optimal solution of the origin production optimization problem at a small computational cost. Then use the approximate optimal solution as the initial solution, the number of iteration steps required for origin optimization problem will be greatly reduced. The proposed method is applied to an actual reservoir production optimization. The results show that the method can greatly shorten the calculation time and increase the calculation efficiency by 3 times while ensuring the optimization effect.
Study on benefit evaluation of developed oil and gas fields
Authors: Chen Yamei 
Published: February 2021

Abstract
With the development of economy and the fluctuation of international crude oil price, people are more and more concerned about the economic benefits of oilfield development. At present, most of the domestic oil fields have entered the middle and late stage of development. With the increase of water cut and decline of production, the economic benefits vary greatly, and some single Wells and block incomes are not enough to make up for their production costs. How to carry out economic evaluation, provide basis for production and operation decision, and seek the best economic benefit is the first problem that must be studied and solved in the development of oilfield quality benefit. Single well and block benefit evaluation system is applied in this article, combined with the most oil field in recent years, the crude oil output, production cost, sales income, etc. comprehensive analysis and evaluation has been developed single well, block, formulate corresponding measures and countermeasures, to guide the oilfield production and operation, inefficient, invalid next block and single well comprehensive treatment has a positive meaning.
Study on resource evaluation of coalbed methane in old gob area of Nanzhuang Coal mine
Authors: Ran Wang 
Published: February 2021

Abstract
Nanzhuang coal mine in Yangquan mining area has entered the dry period of coal resources, founded the mine gas extraction to reduce gradually, need to find a new source for the mine to provide continuous heating, industrial district and coalbed methane in the old mined-out area is clean and precious resources, has a very high use value, and the old goaf coal bed methane development cost is higher, so within the mining area before mining goaf estimation of coalbed methane resources and the development and utilization is of great significance. Based on founded 15# coal seam in Nanzhuang coal mine based on geological and production data, explores the specific geological conditions in Yangquan mining area resources assessment technological applications, according to the situation of 15 # coal seam in the indirect method is chosen as the calculation model for the evaluation of mined-out area resources, calculated founded 15 # coal seam mine goaf largest recoverable CBM resources up to 86.9938 million m3, that founded in mined-out areas is recoverable CBM resources, which provides theoretical basis for subsequent resources development.
Study on HPLC Fingerprint of Dendrobium Nobile Lindl. Flower Based on Chemometrics
Authors: Zhong Ke , Yang Tingting 
Published: February 2021

Abstract
Objective: TO establish HPLC fingerprin of Dendrobium nobile Lindl. (D. nobile Lindl.) flower. Method: Agilent SB-C18 (250×4.6mm, 5μm) chromatographic column was used, with the mobile phase of acetonitrile-0.1% phosphoric acid solution, the flow rate was 0.8mL/min, the wavelength was 254nm, and column temperature was 30°C. Similarity evaluation combined with cluster analysis (CA), principal components analysis (PCA) and orthogonal partial least squares discriminant analysis (OPLS-DA) were used to evaluate the HPLC chromatographic fingerprint of 15 batches of D. nobile Lindl. flower. Result: The HPLC fingerprint of D. nobile Lindl. flower was obtained with 26 common peaks, and 3 of them were identifie, including protocatechuic acid, chlorogenic acid and rutin. The similarity of 15 batches of D. nobile Lindl. flower was between 0.866 ~ 0.989. By CA, PCA and OPLS-DA analysis, the 15 batches of samples were divided into 2 categories, and 14 components contributed most to the classification were obtained. Conclusion: The method is simple and reproducible, and could provide a reference for the quality evaluation of D. nobile Lindl. flower.
Transient simulation of dynamic buckle propagation of a shallow cylinder under external pressure with damping
Authors: Yan Sunting , Cheng Mao , Ling Zhangwei , Jin Zhijiang 
Published: February 2021

Abstract
This paper presents a finite element simulation of transient buckle propagation of shallow elastic cylinder under time dependent external pressure load considering the effect of damping. We conclude that by assigning transient pressure a value slightly smaller or larger than static buckle propagation pressure the buckle propagation directions can be reversed.
Well spacing optimization of hydrothermal doublet system
Authors: Wu Xiaohua , Ji Yonghong , Ma Hongyuan , Kong Jing , Liu Xiao , Jia Chao 
Published: February 2021

Abstract
It is of vital importance to study the influence of well spacing on geothermal system. A three-dimensional hydrothermal coupling model of doublet system is established with a geothermal system in Shandong province as background. Under different well spacing, temperature field distribution values are calculated by finite element software, low-temperature area developments are analysed and values of heat extraction ratio are compared. The results indicate that with a smaller well spacing, low-temperature area will develop faster, thermal breakthrough will happen earlier, and service life will be shorter. Moreover, the larger the well spacing is, the faster the growth rate of the heat extraction ratio is, and the higher final heat extraction ratio is. However, the final heat extraction ratio value become more and more close while the well spacing increase.
Mechanism of advanced water injection and its application in Yuan A well area
Authors: Li Yingming 
Published: February 2021

Abstract
In order to explore an effective way to further increase the single well production and improve the development effect of low permeability fractured oilfield, it provides a new theoretical and practical basis for oilfield development in Taizhao area; Through the study of advanced water injection mechanism and field test in source A well area, an effective displacement pressure system is established in low permeability reservoir, which reduces formation damage caused by formation pressure drop and initial water cut of oil well, and optimizes the scheme by combining modeling and numerical prediction, water injection development adjustment and so on; Therefore, the output of the oilfield at the initial stage of production is increased; Good development results have been achieved in the early stage of production after 6 months’ advanced water injection in source A well area, and it is advisable to carry out advanced water injection for 6 months in the development of low permeability fractured oilfield.
Application and Evaluation of Ternary System Deep Profile Control Technology
Authors: Lu Yao 
Published: February 2021

Abstract
The development process of ASP flooding is strong in stages, and the contradictions in each injection stage are prominent. In the profile adjustment stage, there are still some wells and layers with poor plugging control effect, and the injection system is inefficient and ineffective, which not only causes the waste of high-cost injection system, but also can not effectively displace the remaining oil, which affects the expansion of swept volume and enhanced oil recovery. Therefore, deep profile control technology should be adopted to further assist profile control adjustment, but conventional profile control agents are not applicable due to the existence of alkali in ternary injection system. In this paper, the type of profile control agent suitable for ternary injection system is optimized by laboratory test, and the principle of well and layer selection is optimized. The profile control opportunity is summarized by comparing the profile control effects of four ternary industrial blocks. Through deep profile control technology, the inter-layer and intra-layer contradictions in an industrial block of ASP flooding were alleviated, and the utilization ratio of ASP system in reservoir production degree was effectively improved, and the development effect was improved.