bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the Mixed Multi-attribute Group Evaluation System of Integral Energy System of Industrial Park Based on SNA Analysis Method
Authors: Nie Jing , Xu Ning , Ling Yunpeng , Xu Nan 
Published: July 2020

Abstract
At present, the system modeling of integrated energy system is a hot issue in the field of energy research. Most of the research focuses on the modeling of a specific regional energy system, but the research on the decision-making and evaluation system of integrated energy system is still in its infancy. Therefore, it is necessary to build a decision-making evaluation system for the whole process of the integrated energy system and design scientific evaluation indexes, methods and standards to evaluate the investment, construction, operation and benefits of the integrated energy system systematically and scientifically. On the basis of combing the existing research, this paper deeply analyzed the influencing factors of the whole process of regional integrated energy system, and excavated the factor association network through the social network analysis (SNA). After that this paper constructed the influencing factor association network of the whole process of the integrated energy system with the relationship between the factors as the network nodes. In order to provide reference for relevant research and project implementation, this paper identified the key indexes and built a hybrid index system of integrated energy system.
Decomposition Analysis of Influencing Factors of Electricity Consumption Demand and Intensity under Shanghai’s Transition Development
Authors: Fan Ying , Wang Chen , Sun Kege 
Published: July 2020

Abstract
With the transition development of economic structure and energy consumption structure, electricity consumption of the production sector in China has been growing rapidly since the 21st century. The degree of electrification in Shanghai has deepened and electricity plays an increasingly important role in the agriculture, manufacturing and service sectors. This paper analyses the influential factors of Shanghai electricity consumption demand and intensity in the production sector during 1998 and 2017 through Index Decomposition Method. The results show that the energy structure effect has a growing contribution to the electricity consumption demand growth for the production sector in Shanghai since 2008, which implies that the electrification trend in Shanghai has deepened. The impact of energy efficiency improvement in Shanghai overtakes the impact of economic scale effect and energy structure effect, thus leading to electricity intensity decrease in the production sector. Besides, energy efficiency improvement in the manufacturing sector contributes most to power saving in Shanghai. Economic structure transition also contributes to electricity intensity decrease in Shanghai due to the decrease in the scale of the manufacturing sector. So, it is necessary to further tap the space for energy efficiency improvement in manufacturing and service industries and promote electrification when making strategic decisions of transition development, thus leading to green transformation and development of economy and energy.
The Numerical Simulation and Experimental Research on Combustion Process in 660MW Boiler
Authors: Yu Lei , Tian Hui , Chang Zhen 
Published: July 2020

Abstract
In order to solve the problems of thermal insulation and ash prevention of the furnace combustion layer temperature detection devices installed on the boiler furnace, FLUENT software is used to numerically simulate the actual combustion process in the furnace of 660 MW power plant boiler, and the combustion status of each layer in the furnace is analyzed and studied. And then, according to the results of data simulation the thermal insulation and ash prevention technology implementation of the furnace combustion temperature detection devices is guided. The installation operation test results show that the furnace combustion temperature detection devices work within the range of instrument allowed −20°C∼85°C temperature, which can obtain the direct, rapid, real-time furnace combustion temperature data that provides a valuable source of data for further optimization control of boiler combustion process.
Analysis of underground pressure in fully mechanized top coal caving mining face in greater inclined and weak coal seam.
Authors: Liu liming , Xue Yafeng , Pan Yuntian 
Published: July 2020

Abstract
Taking Zhaogezhuang Coal Mine’s fully mechanized top coal caving test face as the engineering background, through real-time monitoring of the working resistance of the support and the displacement of the top coal and the old roof, the top coal and roof movements at the high dip angle were studied and analysed. The law and the falling characteristics, the initial pressure and the periodic step and pressure strength of the working face are analysed, and the changes and distribution characteristics of the working face pressure along the slope are analysed. Through the research results of this paper, it provides scientific basis for the reasonable parameter design and formulation of the large-inclined working face of the mine, subsequent production process and equipment improvement, and provides technical reference for the mining of similar working faces.
Analysis on Long-Term Mechanism for Energy Conservation and New Mechanism of China
Authors: Liu Ren , Chen Haihong , Xia Yujuan , Wang Zhonghang 
Published: July 2020

Abstract
The government must handle the relation between energy conservation and development in promoting the energy conservation. China is a developing country with a large population, and development has been a prior strategic mission for China for a long time. The energy conservation is an important tool to promote the development, gain better development and serve the development. In promoting the energy conservation, the government shall provide stronger support for the advancement of energy-saving technologies in R&D, engineering demonstration and application, promote innovation for energy conservation technologies and application of energy conservation technologies in industries, develop hi-tech industries and energy-saving industries to help enterprises improve their energy-saving technology level, build a energy-saving industrial system, greatly increasing the competitiveness of national economy and using energy conservation to promote the economic development and scientific development.
Research on the Evaluation Method of Technical Standard Implementation Benefits in State Grid Corporation
Authors: Wu Jinghua , Fan Jiangdong , Li Yan , Lv Chao , Zhang Pengyue , Xu Yan 
Published: July 2020

Abstract
By studying the traditional evaluation methods of the implementation benefits of the technical standards, this paper analyzes the advantages and disadvantages of different traditional evaluation methods. According to the analysis results and the operation of State Grid’s technical standards, evaluation methods of the implementation of the technical standards in line with the national grid were put forward. This provides the basis for the systematic implementation benefits evaluation of the technical standards of the national grid company.
Identifying coal structure using logging data
Authors: Liu Zhidi , Tang Xiaoyan , Yang Junru , Shi Mengxuan 
Published: July 2020

Abstract
Coal structure, which is important for the mining of CBM, is closely related to the coal reservoir fracture characteristics. This paper calculates the integrity coefficient, stability coefficient and fracture coefficient of coal, and constructs a chart confirming the division standard of the coal structure in the study area. The research results show that coal mechanical parameters can effectively represent coal structure. The integrity and stability coefficients of undeformed coal are the highest, and its fracture coefficient is the lowest; the integrity and stability coefficients of fragmented coal, granulated coal and mylonitized coal gradually decrease, and their fracture coefficients gradually increase. The methods described in the paper can classify coal structure relatively accurately and provide an effective new method for the delimiting of coal structure.
Practical Research on Fully Mechanized Caving Face in Extra Thick Coal Seam Based on Cutting Roof Pressure Relief Pre-fracturing Technology
Authors: Sun Zhenping , Liu Chungang , Gao Yuanyuan 
Published: July 2020

Abstract
In order to improve the top coal resources at both ends of fully mechanized top coal caving face in Extra-thick seam and the recovery rate of coal resources during the initial caving, reduce the impact of initial weighting on the working face during the initial caving, and reduce the rock pressure appearances during the mining period near the working face, the fracture damage theory is used to analyze the change of the breaking and caving step distance of roof rock girder and the initial pressure strength of fully mechanized top coal caving face after the roof cutting and unloading. It is concluded that the support pressure area of fully mechanized caving face moves forward, which enhances the caving ability of coal seam and the recovery rate of coal resources during the initial caving period. Taking a fully mechanized caving face of a coal mine in Shanxi Province as the research background, this paper compares and analyses the difference between the first weighting step and the first caving step of fully mechanized caving face with or without roof-cutting pre-fracturing before initial mining and at the end of two roadways. The results show that the first weighting step of fully mechanized caving face is shorter than that of non-pre-fracturing after the implementation of roof-cutting pre-fracturing technology. 1.1m, the first caving step is 16 m ahead of the time when the pre-cracking occurs; and by using borehole peeping technology, it is concluded that the top coal suspended in the triangle area of goaf breaks down along the fissures leading by pre-cracking blasting, effectively solving the problem of overhanging roof in the goaf of two roadways, bringing about direct economic and social benefits of 27.5 million yuan, which has broad prospects for popularization.
Effect of thickness ratio of overlaying layer to hydrate bearing stratum upon the settlement of seabed sediments during Natural Gas Hydrate Dissociation
Authors: Li Hongbo , Ma Shuzhi 
Published: July 2020

Abstract
The dissociation of natural gas hydrate in the process of exploitation will weaken the mechanical properties of the surrounding soil, which will lead to the deformation and destruction of the seabed sediment, thus posing a potential threat to the safety of the undersea engineering infrastructures. In this paper, the finite difference method is used to simulate the vertical deformation of seabed sediments, and examine the effect of thickness ratio of the overlying layer to the HBS upon soil settlement via an established three-dimensional model of submarine hydrate mining. The main research results are as follows: The maximum settlement occurred at the top surface of HBS dissociation centre and the settlement decreased significantly from the mining well to the surrounding and from HBS to the overlying layer. The range of settlement trough on the top of HBS is far less than the overlaying layers. The thickness ratio of the overlying layer to the HBS will have a great influence on the distribution of sedimentation and deformation of seafloor sediments caused by hydrate dissociation. The deformation and the range of the settlement trough both decrease with the increasing thickness ratio of overlying layer to HBS. The research results will provide a strong theoretical reference for the stability of seabed and mining platform during hydrate mining.
Test and Experimental Study on Vibration and Noise Characteristics of Distribution Transformer
Authors: Ma Yuchao , Mo Juan , Wang Guangzhou , Li Xiang , Lu Ling , Ma Shuhui 
Published: July 2020

Abstract
With the continuous scale expansion of power grid, more and more distribution transformers go deep into the urban residential center, which results in increasingly prominent vibration and noise problems. Mastery of the vibration and noise characteristics of the distribution transformer and its propagation law is an important test basis for proposing vibration and noise reduction measures. Relying on a typical 10 kV distribution transformer, vibration and noise tests were carried out on the interior and exterior of transformer tank respectively in this paper. Advanced fiber-optic hydrophone test system was adopted in the test to solve the problem of accurately measuring the internal sound pressure of the transformer in a high electromagnetic field. Finally, time-domain analysis and frequency-domain analysis were done on test data to acquire the acoustic-vibration characteristic and propagation law of the 10 kV distribution transformer. The vibration spectrum of a transformer body is mainly 100 Hz and its rate, the vibration characteristics of distribution transformer tank is basically consistent with the internal transformer core, and the propagation of transformer vibration and noise in oil shows obvious laws.
Human Facial Feature Matching based on Motion-Smoothness Constraint
Authors: Dong Liguo , Xu Wenchao , Zeng Xianxian 
Published: July 2020

Abstract
Face recognition is a practical and important problem. In our life, face recognition problems exist everywhere. How to identify the face in the image accurately and quickly is an important and urgent topic. In this paper, an efficient and accurate face recognition method based on keypoints feature matching is proposed to extract the keypoints features of the face image, and then the nearest neighbor method is used to obtain a large number of keypoints rough matching. Then the correct matching of the keypoints is determined by the motion smoothness constraint of the original keypoints matching. Finally, the matching of the face is determined according to the number of keypoints matching between the two input face images. Some experiments show that this method is suitable for face recognition with expression change and pose change.
Failure Analysis of 2Cr13 Blade in a 135MW Low Pressure Steam Turbine
Authors: Zhao Hai , Jiang Chong , Gao Zhiwei , Hu Bing , Tian Chengchuan 
Published: July 2020

Abstract
The failure mode and causes of low-pressure rotor 2Cr13 stainless steel blades in a power plant steam turbine were analyzed using fracture analysis, SEM, chemical composition analysis and metallographic techniques. The fracture characteristics and mechanism of the blades were discussed. The results show that the failure mode is fatigue which was caused by the machining tool mark at R corner of blade root and tenon transition area.
A Method for Local Clock’s Error With Kalman Filter Based on Mahalanobis Distance
Authors: Chi Xinghua , Zhu Zhaohan , Dong Zhouyang , Xu Fenghui , Xu Jian 
Published: July 2020

Abstract
In order to improve the punctuality of local clock, it needs to use a proper filter to weaken the influence caused by noise in raw clock’s error data. In this paper, An improved Kalman Filter based on Mahalanobis distance is proposed, and the process are shown in details. The final test shows the effectiveness of the improved method in estimation of local clock’s error with gross error.
Research on Bearing Capacity of High Pile Cap with Coupling Beam Based on Finite Element Method
Authors: Hao Xin , Wang Wen , Cao Yue , Tian Guoping , Qin Wei 
Published: July 2020

Abstract
In the construction project, the foundation of multiple pile caps and connecting beams is used to solve the problem of insufficient horizontal bearing capacity and excessive displacement. However, there is no very clear theory to analyze the calculation theory, bearing capacity calculation, and displacement calculation of connecting beams. Therefore, in the paper, the finite element method is used to model and analyze the influence of horizontal bearing capacity, the top of the pile foundation and the connection beam on the internal force. Meanwhile, the influence of horizontal displacement, the selection of the connecting beam size and the position of the connecting beam on the bearing capacity is analyzed as well. Besides, a concise calculation method and an assessment on the bearing capacity of the actual engineering foundation are gained. The experiment proves that the research method in the paper can well simulate the vertical compression static load test of high piles with connecting beam caps.
Analysis on the Mechanical Stability of the Leg Joints in UHV Transmission Tower
Authors: Qin Wei , Wang Quan , Zhang Zhuoqun , Hao Xin 
Published: July 2020

Abstract
Transmission line pole tower, whose safety and reliability will directly affect the safe and stable operation of the entire transmission line, is a rod-shaped and tower-shaped structure that supports overhead transmission line conductors and ground lines and maintains a certain distance between them and the ground. Moreover, the stress stability of the leg structure joints in UHV transmission towers is mainly analyzed in the paper. With the help of the finite element analysis software, taking the arrangement of the long and short legs in the actual structure of the tower as an example, the influence of different angles of the tower on the bending moment is compared and analyzed under the condition that the main material slenderness ratio is the same. Meanwhile, in order to eliminate the influence of horizontal force on the height of different tower legs, only the bending moment generated by the structural system at the tower legs under axial pressure is considered to continuously improve the stability and reliability of the line pole tower structure, so that the power safety can be guaranteed to a large extent.
Numerical Simulation of Shock Wave-Boundary Layer Interaction with Supersonic Film Cooling
Authors: Liu Zhigang 
Published: July 2020

Abstract
As an effective external cooling method, film cooling can significantly reduce the wall temperature of hot end components of aero engines and large liquid rocket engines. With the development of supersonic turbine blade, liquid rocket engine thrust chamber and ramjet thermal protection technology, the impact of shock wave-boundary layer interaction on the cooling effectiveness of film cooling is a problem that must be considered in the engine heat transfer design. In this paper, the two-dimensional supersonic film cooling is simulated based on the plane slot model, and the blowing ratio is similar to the actual engine. Impact of wave structures on film cooling was studied, and flow loss was evaluated by total pressure and entropy parameter to investigate the film cooling efficiency and uniformity distribution. Physical mechanism of shock wave-boundary layer interaction and its impact on film form was revealed. It shows that the shock wave leads to dramatic changes in flow parameters. Boundary layer separation is found due to the shock, and significantly affects the cooling efficiency. The blowing ratio is an important factor affecting the cooling efficiency. With blowing ratio increasing, local film cooling effectiveness and average cooling efficiency are improved and cooling uniformity decreases. However, the shock wave will cause the temperature of the insulation wall to rise, resulting in decreased cooling efficiency.
Finite Element Analysis and Test Verification of Super-Large Vertical Steel Storage Tank
Authors: Ji Jing , Song Huayu , Xu Ming , Li Zhihui , Wang Xue , Jiang Liangqin 
Published: July 2020

Abstract
In order to master the static characteristics of the super vertical steel storage tank structure, based on the potential flow theory, the fluid structure coupling element and contact element are introduced, and the three-dimensional finite element model of 150000m3 super large steel storage tank system is established by using the finite element software ADINA. The static analysis of the tank structure under different water filling height is carried out, and the circumferential and axial stress and distribution at different height of the tank wall structure are obtained. The results are in good agreement with the experimental results, and the rationality of ADINA finite element modelling method is verified. Finally, the stress nephogram and design suggestions of the wall of the super vertical steel tank are given, which lays the foundation for the further static and dynamic nonlinear analysis of the tank.
A New Repair Criterion for Inconel690 Alloy Steam Generator Tube with Fretting Wear
Authors: Tao Yuchun , Peng Zhizhen , Kong Chenguang , Huang Song , Hui Hu 
Published: July 2020

Abstract
Structural integrity assessment of steam generator tubes(SGT) is important for the safety operation of pressurized water reactor. In this work, a repair criterion for Inconel690 SGT with fretting flaw was proposed. Firstly, experiments were conducted to address material strength, eddy current examination and bursting pressure of defected SGT. Then, a numerical method was proposed to predict bursting pressure. At last, all factors were concluded in a simplified statistical method of structural integrity assessment. For anti-vibration bar fretting, Condition Monitoring criterion, Operational Assessment criterion as well as the repair criterion for different inspection interval were proposed. The present criterion can provide reference for the inspection interval considering long-term temporary shutdown or standby.
Analysis of Financial Indicators of Listed Companies——A Case Study of Aonong Group
Authors: Zeng Zhiqian , Li Xinglin , Chen Xudong 
Published: July 2020

Abstract
With the rapid development of China’s economy, animal husbandry has become an indispensable industry in China’s economic development. Both the number of poultry raised and the output of products have increased significantly compared to before. China’s animal husbandry is gradually moving towards regionalization, industrialization, and scale. This requires the state’s support for animal husbandry in terms of policy, financial guarantee, and personnel training. At present, China’s livestock industry accounts for about 30% of the primary industry, and it has become an important pillar of the primary industry. Because of this, it is particularly important to analyze the financial statements of agricultural groups engaged in animal husbandry. This article takes the financial statements of Aonong Group listed on the Shanghai Stock Exchange from 2014 to 2018 as an example for financial analysis.
Contactless Distribution mode based on Circular Express Box
Authors: Liu Na 
Published: July 2020

Abstract
During the outbreak of new coronavirus, the traditional way of distribution has many disadvantages, such as wide contact with people and wide range of activities. These disadvantages will not only cause cross infection between distribution personnel and customers, but also increase the difficulty of epidemic prevention and control to a certain extent. As a new distribution mode, contactless distribution is widely used under special outbreaks due to the advantages of fewer contact personnel and high distribution efficiency. In view of this situation, we have carried out a study on the problems arising from the express delivery process, put forward the “Contactless distribution mode based on circular express box” point of view, namely, the establishment of express delivery station shipping station in the community. All express delivery companies are placed in the designated location, in order to solve the shortcomings of the traditional delivery process.