bluuebunny/crossref_metadata_2025_split huggingface dataset:
Three Dimensional Analysis Method and Application of Pressure Drop after Coal Seam Pressure
Authors: Peng Hongzhao , Kang Yunwei , Zeng Wenting , Sun Bin , Chen Dong 
Published: November 2020

Abstract
The analysis of pressure drop after compression is very important for obtaining coalbed gas reservoir parameters and optimizing coalbed gas fracturing design. However, there are some problems such as closed pressure analysis, inaccurate calculation of fracture geometry and effective permeability. In this paper, a three-dimensional analysis model of post-pressure pressure drop is established based on the principle of fluid volume balance during injection and closure. Based on the quasi-three-dimensional fracture model, the geometric size, fitting pressure and filtration coefficient of fracturing fluid are explained, and the practicability and accuracy of this method in the analysis of pressure drop after coal seam pressure are verified by field construction examples.
Research on Building Fire Risk Management Based on BIM
Authors: Zhang Hao 
Published: November 2020

Abstract
Based on the current building development needs and the existing problems of fire risk management, this paper analyzes the specific application of BIM technology in building fire safety analysis, and also puts forward the direction of thinking, and then builds a BIM-based fire risk management system model framework, which can provide references and ideas for the informatization and intelligent development of building fire risk management.
Port Container Throughput Forecast Based on ABC Optimized BP Neural Network
Authors: Huang Fucheng , Liu Dexin , An Tiansheng , Cao Jie 
Published: November 2020

Abstract
In order to improve the accuracy of port container throughput prediction, an improved ABC-BP prediction model based on Artificial Bee Colony (ABC) was proposed. With the advantage of global search ability and difficulty in local optimization, the weights and thresholds of Back Propagation (BP) neural network are optimized, and the optimal weights and thresholds in the network are finally determined. Referring to the existing research results, Qingdao 2014-2019 (24 quarters) GDP, port throughput, total foreign trade import and export volume were selected as network input, and Qingdao port 2014-2019 port container throughput statistics were used as network output, a total of 24 sets of data were constructed, so as to build a BP neural network prediction model. The first 20 groups of data were used as the training set, and the last 4 groups of data were used as the test set for instance verification. The results show that, compared with the traditional BP neural network and the BP neural network prediction model optimized by Genetic Algorithm (GA), the ABC-BP model can significantly improve the prediction accuracy of port container throughput.
Study on the Influence of Solid Medium Adsorption on the Migration and Transformation of Chlorinated Hydrocarbons in the Groundwater System
Authors: Zhang Shuaiji , Jia Ruibao , Sun Shaohua , Ma Zhenmin , Liu Shusen 
Published: November 2020

Abstract
In this paper, the pollution of chlorinated hydrocarbons in the groundwater system is taken as the main research object. According to the adsorption characteristics of chlorinated hydrocarbons in different aquifer media, carbon tetrachloride is taken as an example to carry out isothermal adsorption experiments under different solid medium conditions. The concentration data are obtained by fitting the standard curves of linear, Langmuir, Freundlich, and Temkin types to study the mechanism of chlorinated hydrocarbons in different media. The results show that the adsorption capacity of silty clay is greater than that of limestone at the same initial concentration. Therefore, before the pollutants enter the karst water, the silty clay will “intercept” the pollutants. However, once the karst water is polluted, the limestone medium has a small adsorption capacity, which will bring difficulties to pollution control and treatment.
Study on the Plant Diversity Under the Economic Fruit Forest in the Red Soil Erosion Area
Authors: Zhang Lichao , Yang Jiaqun , Ge Peilin 
Published: November 2020

Abstract
Navel orange garden and camellia oleifera forest are the most characteristic important economic industrial tree species in Jiangxi Province, and are mainly planted in mountainous and hilly areas. Because the species diversity of plants under the economic fruit trees is not rich, soil erosion and non-point source pollution are caused. Therefore, in view of the problems of soil erosion and nutrient deficiency under the economic fruit forest, this paper points out that the sustainable development of the economic fruit forest ecosystem can be promoted by increasing the plant diversity under the economic fruit forest, improving the ground cover of the conomic fruit forest, preventing and controlling the soil erosion, cultivating the soil fertility, restoring the biodiversity and promoting the sustainable development of the economic fruit forest ecosystem. At the same time, the future research and development direction of this field are discussed, which can not only provide scientific basis for the sustainable development of economic fruit forest industry in red soil erosion area, but also provide theoretical and technical support for the ecological construction of soil and water conservation and the development of ecological agriculture on slope land. It is of great significance for promoting the construction of ecological civilization in Jiangxi Province.
Basic Research on the Satisfaction of Building Indoor Personnel Based on Personnel Portrait
Authors: Xu Liangping , Wang Yaowu , Sun Pengcheng , Yang Chuanjun 
Published: November 2020

Abstract
During the operation phase, energy conservation of buildings gets much attention. Controlling methods are often based on physical parameters, ignoring the specific needs of different groups of people for the environment. To evaluate the current status, the questionnaire is used to investigate the relationship between personnel comfortability and various factors. This article aims to introduce the method of personnel portraits, balance the personality and common conflicts of the crowd, and solve the control problem of comfort that varies from person to person. Finally, combined with the analysis of the results of the questionnaire, a multi-faceted study of personnel satisfaction was provided to provide a reference for methods that can achieve energy-saving and satisfaction control at the same time.
Analysis of Groundwater Environment Evaluation and Prediction
Authors: Xiao Yuanhao , Zhu Lihong , Wu Yipeng , Zhao Xudong , Xi Junpeng , Chen Shun 
Published: November 2020

Abstract
In accordance with the requirements of Technical guidelines for environmental impact assessment―groundwater environment (HJ 610-2016), the process of groundwater environmental impact assessment and prediction was analyzed. Groundwater Model System (GMS) was used to simulate Groundwater flow field and solute transport, the following main conclusions were draw. As long as the project conforms to the specifications and design and the management is in place during operation, the production area and tailings area in normal working conditions will not cause obvious adverse effects on the quality of groundwater. Under different assumptions, groundwater pollution of the production area and tailings area in abnormal conditions will not directly affect the drinking water, farmland irrigation water and surface water of surrounding residents.
Study on Horizontal Well Over-replacement Fracturing
Authors: Jia Jiangfen , Long Changjun , Wang Xin , Zhang Hong , Tian Jianchao , Xu Zhengdong , Zhang Bin , Wang Peng , Ning Mengmeng , Kong Weizhong 
Published: November 2020

Abstract
Over-displacement technology often occurs in the fracturing process of horizontal gas wells. The effect of horizontal shale gas wells productivity with different fracture morphology considering over-displacement were analyzed by numerical simulation. The results show that the over-displacement productivity is only 12.3%-15.0% of the equilibrium displacement productivity considering the complete fracture closure, and the fracture morphology has no effect on the productivity. Therefore, the amount of over-displacement hydrofrac fluid should be minimized in horizontal gas well, the fracturing fluid can rapidly gel-break and flowback after fracturing, proppant can flow back or settle at the fracture seam, and complex fractures can be formed near the wellbore as far as possible, so that it can reduce the impact of over-displacement on productivity. This study can provide a theoretical basis for fracturing design and productivity prediction of horizontal gas wells.
Big Data Analysis on the State of Automotive Cabin Air Filters in China
Authors: He Yongao , Du Tianqiang , Wei Shuhong , Yin Wei , Tian Cheng , Li Chuanjie 
Published: November 2020

Abstract
Under the influence of the COVID-19, consumers pay more and more attention to the safety and health of the air in the car. As the core component of the air purification in the car, the performance of the cabin air filter is a hot topic for vehicle enterprises and parts enterprises. This paper introduces the inspection and data analysis of cabin air filter products in China by China Automotive Technology And Research Center, which includes the product geographical distribution, brand compliance rate, the compliance rate of different testing items. Based on the analysis of fractional efficiency of 0.3 μm, 2.5 μm and 10 μm particle sizes and particle sizes distribution in the atmosphere, this paper puts forward the view that it is necessary to pay more attention to the fractional efficiency of particulates which below 1 μm. In addition, the existing problems of cabin air filter are studied by data and its development direction is prospected.
Visualization Analysis of Sepiolite Research Progress in Recent Ten Years
Authors: Zhang Mengxin , Huang Hui , Li Ru , Xu Ruoyi , Li Qianwen , Jiang Luyao , Tao Shiying 
Published: November 2020

Abstract
The current situation and hot spots of sepiolite research were explored to provide reference for the further work in China. All literature related to sepiolite in CNKI database were searched in the past ten years. CiteSpace 5.6.R3 software was used to analyze the research situation from the perspective of the annual publication volume of key institution authors and other aspects in combination with the literature visualization function of HowNet. A total of 1084 papers were analyzed, and the overall number of publication was risen from 2010 to 2020. The research institute of Environmental Protection, Ministry of Agriculture, Hebei University of Technology, Xiangtan University were in the top list. The high-frequency authors were Xu Yingming, Liang Xuefeng, Qin Xu. Keyword analysis showed the main research hotspots were sepiolite adsorption and modification.
Static Mechanical Properties and Failure Modes of Layered Sandstones in Freeze-thaw Cycles
Authors: Chang Sen , Xu Jinyu , Wu Yunquan , Wang Tengjiao , Liu Gaojie , Huang He 
Published: November 2020

Abstract
Because the underground space in the alpine area is often in the freezing and thawing cycle state, as well as the layered rock is widely found in nature and the mechanical properties are complex, the mechanical properties of the lower rock in the freeze-thaw cycle are directly related to the development and utilization of the underground space in the alpine area. Based on the electro-hydraulic servo pressure tester, the static compression test of freeze-thaw damage specimen was carried out to study the strength, deformation, failure mode and anisotropy characteristics of the layered sandstone in freeze-thaw cycle condition. Also, the influence of freezing and thawing action and layered structure on the static mechanical properties and the mechanism of action were analysed. Finally, we obtained the following conclusions: The stress-strain curves of vertical and parallel bedding sandstones under freezing and thawing conditions can be roughly classified into compaction phase, elastic phase, plastic yielding stage and failure stage, and with the increase of freezing and thawing times, the peak stress and elastic modulus of layered sandstone samples decrease gradually; compared with vertical bedding samples, the mechanical parameters of parallel bedding samples deteriorate faster under freeze-thaw cycles; the deterioration of mechanical parameters of parallel layered specimens is faster under the condition of freeze-thaw cycle; the anisotropy index Rc of the intensity increased from 1.07 in 0 freeze-thaw cycle to 1.46 in 40 freeze-thaw cycles, and the intensity anisotropy became more significant as the number of freeze-thaw cycles increased.; when the number of freeze-thaw cycles is less than 10 times, the vertical bedding test specimen breaks the main crack at a certain angle (about 30°), showing shear failure through multiple bedding, while when the number of freeze-thaw cycles increases, the main crack tends to be parallel to the loading direction; parallel bedding samples always exhibit splitting failure along the bedding. The test results can provide theoretical support for the development of special underground space such as alpine and freeze-thaw areas.
“Sustainable growth” or “growth with pollution”—— research on economic growth patterns of industrial enterprise based on industry attributes
Authors: Yue Qin , Chen Jiameng 
Published: November 2020

Abstract
In recent years, protecting the ecological environment while developing the economy has become a widespread demand, but there is still a big controversy about the mode of industrial economic growth in China. This paper analyzes the growth pattern of China’s industrial enterprises by using the micro data of enterprises from 2011 to 2018. On the one hand, industrial enterprises without pollution fees show higher sales growth rate, and this phenomenon is more obvious in high pollution industries such as mining industry and smelting industry, which proves the existence of “sustainable growth” pattern; on the other hand, among the industrial enterprises that are levied pollution fees, those with more pollution fees have higher sales growth rates, which shows that there is still a phenomenon of “growth with Pollution” in some polluting enterprises. These enterprises evade the responsibility of protecting the environment by paying the pollution fees, and in exchange for the growth of the company’s sales at the expense of the environment. This paper provides a reference for further promotion of energy saving, and selection of sales growth pattern for highly pollution industries such as mining industry and smelting industry.
Evaluation Method Of Important Nodes Of Water Supply Network Under Terrorist Attack
Authors: Shun Chen , Xudong Zhao , Baoqiang Xiao , Yuanhao Xiao , Junpeng Xi 
Published: November 2020

Abstract
Aiming at the problem of urban water supply network protection under terrorist attack, a new comprehensive value evaluation method for important nodes of water supply network is proposed. Combined with the characteristics of terrorist attacks, Epanet and Aloha were used to simulate the changes in the efficiency of the water supply network and the consequences of secondary disasters after the node was destroyed, and a comprehensive value evaluation model based on the node’s own value, system value and indirect value was constructed. Taking an urban water supply network in Hubei Province as an example, the results can get the following conclusions: ①Compared with the buried water pipeline, the water supply plant as the source of the urban water supply network is the key target of terrorists; ②the calculation results show the comprehensive value of different water plants The gap is huge, and the comprehensive value of water plant 3 is nearly 5 times that of water plant 4; ③ the greater the comprehensive value of the water plant, the greater the terrorist attack revenue and the higher the probability of attack. Therefore, when responding to terrorist attacks, the comprehensive value should be High water plants provide more protection resources.
Study on Evaluation of Eco-city Construction Based on Sustainable Development
Authors: Yao Jiali , Yan Huihui , Shao Jun 
Published: November 2020

Abstract
According to the local development plan of Edinburgh, this paper establishes the evaluation system of ecological city construction, and combines the statistical data of 2014-2018, and uses the analytic hierarchy process and entropy weight method to calculate the index weight. the comprehensive evaluation of urban ecological construction in Edinburgh is carried out by the method of “model and sum”. The results show that the construction of ecological city in Edinburgh has shown an upward trend from the publication of the manuscript of local development plan in 2014, in which the construction effect has increased significantly from 2016 to 2017, and the evaluation value has reached the highest point. And then 2018 appeared a downward trend. Finally, on the basis of the evaluation of its implementation, discusses the enlightenment to the construction of ecological city and the realization of sustainable development in China.
Joint Optimization of Ship Sailing Speed and Container Handling Rate for a Near-sea Liner Service Route
Authors: Xi Jiang 
Published: November 2020

Abstract
This paper jointly designs the optimal ship sailing speeds on shipping legs and the optimal handling rates at ports of a near-sea liner service route operated by a container liner shipping company. A mixed integer linear programming model is developed, which can be solved directly by the commercial solvers to give a global optimal solution. The model is further applied to a real-life case. Results demonstrate that both bunker price and unit inventory cost affect the optimal ship sailing speed and the optimal container handling rate.
Anticorrosion Property of Chemically Bonded Phosphate Ceramic Coatings with Silica Sol
Authors: Zhang Yang , Liu Pai , Ding Zhu 
Published: November 2020

Abstract
To protect steel from corrosion in the service environments, a chemically bonded phosphate coating was successfully prepared in this study. The coating consists of aluminium dihydrogen phosphate, silica sol, aluminium hydroxide, silica, magnesium. Then, the microstructure and anticorrosion property of the coating were studied. By using XRD and SEM characterization, it is found that a crystalline Newberyite (MgHPO4·3H2O) and amorphous species formed in microstructure of coating matrix. The anticorrosion property was investigated by salt spray test, in which the coating was brushed on the surface of steel substrate in advance. Then, the anticorrosion property was carried out by an electrochemical test. Results indicated that the coating has an excellent effect in protecting steel substrate from corrosion. Because the compositions of the coating are water based, and it does not need any organic solvent, therefore the coating is both green and environmentally friendly.
Simulation Study on the Temperature Field of Iron-based Powder Metallurgy Friction Pair
Authors: Han Junjiao , Ning Keyan , Han Ming , Zhang Nan , Du Jianhua , Lang Zhaoyang , Liu Zhe , Liu Guimin , Ji Zhen , Jia Chengchang 
Published: November 2020

Abstract
For the iron-based powder metallurgical friction pair under high-speed braking conditions, the structural model and physical model of the friction pair were established, and the finite element software ABAQUS was used to calculate and analyze the temperature field and distribution law of the friction pair during friction braking. The results show that during friction braking, the temperature at the outer diameter of the contact surface of the friction pair is the highest, and the temperature at the inner diameter of the edge of the chip removal tank is the lowest. During braking, the temperature of friction pair increases first and then decreases with time.
Automatic Detection for Dam Restored Concrete Based on DeepLabv3+
Authors: Jun Zhang , Shiqiao Chen , Zhenhua Deng , yuan Zeng , Chabei Li 
Published: November 2020

Abstract
The concrete surface defects caused by various factors need to be repaired since the construction stage of the concrete dam. However, the binding strength between restored concrete and the original concrete will gradually get worse in the long run and appear some problems such as peeling. At present, the repaired concrete is mainly checked by the workforce, but it is time-consuming, inefficient, and hard to quantitative evaluate, such as the peeling area. A semantic segmentation method based on the DeepLabv3+ with ResNet50 backbone is proposed to restored concrete identification automatically. The dam restored concrete data set is established, including 372 high-resolution images to verify the method. The results indicated that the DeepLabv3+ model finally reaches 0.68 mIoU on the test set, which is a practical way to detect dam restored concrete.
Research on and Application of Roof Management Technology in 8.8m Ultra-high Fully Mechanized Mining Face
Authors: Qianyi Zhang , Tao Du 
Published: November 2020

Abstract
Aiming at the problems of high mining intensity and difficult roof management in a fully mechanized mining face with an ultra-high mining height of 8.8m, this article predicts the pressure parameters and rules of the working face based on the roof management technology of the 12402 fully mechanized mining face in Shangwan Coal Mine. The selection of the working surface bracket and the on-site roof safety management system are explained and analyzed. The results show that the analogy method can be used to predict the mining pressure parameters and rules of the working face to meet the needs of the application of large mining heights; the conventional techniques such as forced caving, “Scraped roof support moving method” and “Advanced drawing support method” are still effective under the condition of 8.8m mining height. The roof safety management system formed during construction guarantees the safe and efficient production of the ultra-high mining height working face, and provides a reference for the popularization of the mining technology of ultra-high mining height.
Hydrochlorination of Acetylene Using the Novel SiC Foam with Hollow Structure Supported Au/C Catalysts
Authors: Wang Peng , Yang Xiaodan , Gao Yong , Zhang Jinsong 
Published: November 2020

Abstract
Acetylene hydrochlorination using Au/C as catalyst, is an important process to produce vinyl chloride. It is a highly exothermic and diffusion-controlled reaction with local hot spots and poor diffusion process in the fixed-bed reactor, weakening the catalytic performance of Au catalyst. The structuring of catalyst using solid SiC foam ceramic can solve the above problems through optimizing spatial distribution of Au/C, reducing the pressure drop and temperature rise. In order to further disperse Au/C, the novel SiC foam with hollow structure was manufactured to compare with solid SiC foam. The hollow foam structured catalyst has inside and outside surface, thinner catalyst coating and smaller Au particles. Thus it provides more active site accessible to the reactants and further shortens the diffusion distance, then improving the catalytic efficiency. The catalytic lifetime (acetylene conversion above 90%) of hollow SiC foam structured catalyst is 205 hours while that of solid foam is 126 hours at acetylene gaseous hourly space velocity (GHSV) of 120 h−1. In conclusion, the better dispersion of Au/C on hollow SiC foam supported structured catalyst is the main reason for activity and stability enhancement.