bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application Analysis of Oil Test Fracturing Technology in Deep Gas Wells
Authors: Zhong Lin 
Published: August 2019

Abstract
In the process of oil exploration, it is necessary to define the general orientation and distribution of underground reservoirs through oil testing and fracturing operations, and to obtain the specific conditions of detailed crude oil reservoirs. Because of the characteristics of high temperature and high pressure of deep gas, it is difficult to test and fracturing deep gas wells. Based on the analysis of the characteristics of deep gas and the development needs of oil testing technology, this paper analyses the oil testing and fracturing technology of deep gas wells through reservoir modification and fluid drainage.
Research on Fracturing Effect of the Second Kind of Oil Layer Weak Alkali Ternary Composite Flooding
Authors: Wang Shuxia 
Published: August 2019

Abstract
The main reason for the low production of oil wells in the second type of oil wells is the poor development of the oil layer itself and the near-wellbore pollution caused by the scaling of the ternary composite system. By analyzing the dynamic and static factors affecting the fracturing of the production well, it is known that the fracturing effect is better when the formation pressure is higher than the saturation pressure after fracturing; the effective thickness is greater than 5 m, the first type of connectivity is greater than 30%, and the high water flooding thickness ratio is less than 40%, production liquids with a drop of more than 20%, a water cut of more than 5%, and a chemical flooding degree of less than 15% can achieve better oil and precipitation effects. For the weak alkali ternary composite flooding type II oil layer with permeability greater than 100×10-3μm2, the conductivity of fracturing has little effect on the fracturing effect, and the fracturing timing is the key factor to determine the fracturing effect.
Dynamic Modeling and Simulation of a Parallel Locking Mechanism
Authors: Xiang Chao , Li Baoren , Gong Yajun , Zeng Baoping 
Published: August 2019

Abstract
Aiming at the locking problem of the mechanism in face-to-face contact, a kind of parallel mechanical locking device is designed, which can make the locked surface self-locking even when the locking hydraulic system fails, thus ensuring the safety and reliability of the locked mechanism. Through theoretical analysis and dynamic simulation of ADAMS software, the self-locking function of the device is verified and the self-locking Angle is calculated. Meanwhile, considering that the locking device may act as a “resonator” and cause secondary excitation to the locked device, which affects the vibration characteristics of the locked system, the mode analysis of the locking device is done by using ABAQUS software, and the feasibility of the locking device for the locked mechanism excited by low frequency is proved.
CFD Simulation on Leakage and Explosion Accident of Liquefied Hydrocarbon Loading Station and Dynamic Responses Analysis of Control Room
Authors: Gu Meng , Ling Xiaodong , Du Kaituo 
Published: August 2019

Abstract
Considering the dangerous characteristics of Liquefied hydrocarbon loading station, a three-dimensional model of a certain liquefied hydrocarbon working area was established to simulate the accident of liquefied hydrocarbon leakage and vapour cloud explosion, and the relationship between the number of loading vehicles and explosion overpressure was analyzed. Meanwhile, the existing control room is not designed for anti-explosion, and the personnel are relatively concentrated, so the dynamic response of the control room under explosion loading needs to be analyzed. The researches show that due to the blocking effect of propylene substation on the combustible gas cloud under north wind, the equivalent stoichiometric cloud mass is higher than that in the southwest wind direction. The blocks in the working area are mainly distributed along the east-west direction, so the peak overpressure of the propylene substation is smaller than that of the control room. There is a linear relationship between the loading vehicles and the explosion overpressure in the control room. With the decrease of the number of loading vehicles, the explosion overpressure decreased significantly. If the number of loading vehicles is not reduced, the brick wall of the existing control room will be broken and collapsed under explosion loading, threatening the safety of personnel in the control room.
Study on The Characteristics of Temporal and Spatial Changes of Regional Water Resources
Authors: Zhang Haiou 
Published: August 2019

Abstract
In order to accurately reflect the basic characteristics of the water quality of the different reaches of the Weihe River (Shaanxi section), this paper selects ammonia nitrogen, CODcr, total phosphorus, and total nitrogen, which are more serious and concerned about exceeding the standard in the surface water of the Yellow River basin based on a large number of survey data, draw the curve of four water pollution indicators along the Weihe River (Shaanxi section) in different water periods, and grasp spatially the environmental changes of different parts of the Weihe River (Shaanxi section), different upstream and downstream parts. And the contrast of quality changes, so that the river water quality evaluation is typical and representative, provide a basis for the comprehensive management of the Weihe River basin, and promote the sustainable development of the Guanzhong region.
Text Classification of Potential Dangers in Coal Mine Safety Based on Convolutional Neural Network
Authors: Liu Na , Hu Yanzhu , Ai Xinbo , Shao Yanchao 
Published: August 2019

Abstract
In recent years, with the improvement of people’s safety awareness and the steady progress of safety production supervision, text classification algorithm based on data mining has been widely applied. At present, for the classification of hidden danger text in coal mine, it mainly relies on manual or machine learning. The efficiency of manual classification is too inefficient to meet the requirements of massive text classification. And the accuracy of machine learning-based classification method is low. In view of the above problems, this paper combines Word2vec and convolutional neural network to achieve accurate classification of hidden danger text in coal mine safety, and achieves great results. The results show that Word2vec can retain the semantic information between contexts. Convolutional neural network can effectively extract the high-level features of local contexts, and the classification effect is more accurate. This method can be implemented in the classification of hidden danger text in coal mine, which has very important practical significance.
Pre-stack Depth Migration based on VTI Media in Common Shot Domain
Authors: Song Liang , Guo Tianzhi 
Published: August 2019

Abstract
With the increasing complexity of seismic exploration targets, the basic imaging theory based on the basic assumption of simple isotropic media cannot meet the actual needs of oil and gas exploration at this stage. Therefore, the study of imaging methods in anisotropic media is of great significance to the exploration of various underground structures and mineral exploitation. In this paper, the SSF continuation operator for VTI anisotropic medium is derived and the one-way prestack depth migration with VTI media in common shot domain is realized. The VTI-HESS model is verified by calculation. Compared with prestack depth migration of various isotropic media, it can be seen that prestack depth migration of VTI media has better imaging effect because of considering anisotropic parameters, which is closer to the actual imaging effect of exploration data.
Applying of soft rock to control Mu Us sandland: A case study of Yulin City
Authors: Cheng Jie , Wang Huanyuan 
Published: August 2019

Abstract
In order to alleviate the contradiction between people and land, improve the quality of cultivated land and the ecological environment of the land, this paper studied the sand-fixing characteristics of soft rock by indoor experiments and promoted the field. The results showed that the complementarity of the soft rock and sand in the particle size composition, the two had mixed with the composite soil to form a good particle size distribution, increased the grain roughness, and had a sand-fixing effect, improved the porosity of the sand at the same time. The increasing of the content of clay increased the water retention and water retention of the sand and reduced wind erosion. Based on this sand-fixing mechanism, the practical application of arsenic sand-fixing in Daji Khan Village, Yuyang District, Yulin City had been carried out by means of soil-body reconstruction project of soft rock and sand, water, road and forest supporting projects, and the control effect is remarkable.
Multiphase Flow Law and Well Control Risk Analysis in Deep Water Gas Hydrate Horizontal Well While Drilling
Authors: zhang Yangyang , Tang Zhiqiang , Duan Wenjiang , Si Menglin 
Published: August 2019

Abstract
Natural gas hydrate is an important clean energy in the future because of its high energy density, clean and pollution-free, large amount of resources and wide distribution. However, the gas hydrate reservoir in the sea area has the characteristics of deep water depth and shallow reservoir buried depth. It is difficult to develop, and the development cost is high, so it is difficult to meet the needs of commercial exploitation. Horizontal well drilling can ensure reservoir drilling rate, increase reservoir drainage area and improve development efficiency. During the drilling process of deep water gas hydrate horizontal wells, the gas hydrate is decomposed into gaseous gas due to the change of temperature and pressure environment. The multiphase transient flow of gas in the wellbore will affect the wellbore temperature and pressure environment and cause well control risk. The calculation model of multiphase transient flow and temperature field in drilling wellbore of deepwater gas hydrate horizontal well and the model of gas hydrate formation were established. The gas distribution, migration law and temperature and pressure distribution in wellbore were analyzed, and the variation of wellbore pressure, surface flow law and temperature and pressure range of gas hydrate formation were grasped, which will provide theoretical basis and construction reference for deep water gas hydrate horizontal well drilling.
Remote Sensing Image Registration Algorithm Based on Multi-scale Corner and Haar Transformation
Authors: Yang Yanli , Liu Zhiguo , Zhang Jinsheng 
Published: August 2019

Abstract
This paper proposed a new image registration algorithm based on multi-scale corner and Haar transformation, which its core idea is the combination of Haar operator and the Laplace image pyramid are used in down sampling the original images, and detect corner at the resulting images, Angle of the corner and most value point of scale response (scale precision positioning) will get, registrating images will obtained after rotation and translation. Theoretical analysis and simulation results shows the algorithm has higher registration accuracy and small amount of computation.
Evolution characteristics of soil carbon density after homestead remediation
Authors: Guo Zhen , Li Juan , Shi Chendi , Wang Huanyuan 
Published: August 2019

Abstract
In order to gain an in-depth understanding of the effects of different reclamation years on soil carbon sequestration after remediation of abandoned homesteads, this study relied on the land improvement project carried out in Changchun County, Shaanxi Province, to study the soil carbon density of different reclamation years. The results shown that the total carbon and inorganic carbon content of 0-20cm and 40-60cm soil layers increased steadily with the extension of cultivation time after the rectification of abandoned homesteads. In the 20-40 cm soil layer, the soil total carbon and inorganic carbon content increased firstly, then decreased and then increased with the extension of the cultivation period, especially the total carbon content changed the most. In the 0-40 cm soil layer, the organic carbon showed a tendency to decrease first, and the change trend of the organic carbon content in the 40-60 cm soil layer increased first and then decreased. The trend of carbon density changes was consistent with the trend of carbon content. After 10 years of reclamation compared with before the renovation, soil total carbon and inorganic carbon density increased by 22.93% to 47.72% and 16.11% to 45.30%, respectively, the regularities of vertical distribution was 40-60 cm > 0-20 cm > 20-40 cm. The density of organic carbon increased by 41.12% to 68.27% compared with before the renovation, and the regularities of vertical distribution was 0-20cm>20-40cm>40-60cm. It shows that long-term reclamation after homestead remediation is beneficial to the increase and fixation of surface soil organic carbon.
Technology Research of Desulfurization Wastewater Zero Emissions
Authors: Xue Fangming , Chen Feng , Sun Yiqing , Liu Xiuru , Su Jingcheng 
Published: August 2019

Abstract
This paper investigates the operation process and operating costs of Heyuan Power Plant and Hengyi Power Plant wastewater by on-site inspection. It is considered that in areas with high environmental protection requirements, the highly reliable pretreatment + evaporation crystallization process should be considered first. In combination with the situation of the power plant, a reverse osmosis system is added after the pretreatment device to increase the processing capacity of the equipment and reduce the running cost.
Research on the Selection and Application of Aquatic Plants in Constructed Wetlands -- Taking Qinyuan Artificial Lake of Guangxi Polytechnic of Construction as an Example
Authors: Qin Ruqiong 
Published: August 2019

Abstract
The direct absorption of aquatic plants in artificial lake, adsorption of pollutants, indirect improvement of artificial lake environment and promote microbial water purification and other environmental protection effects are increasingly obvious. Taking Qinyuan artificial lake of Guangxi Polytechnic of Construction as an example, this paper selects aquatic plants suitable for local environment with strong decontamination ability, good landscape effect and high economic value in the constructed artificial lake wetland system, which plays an important role in purifying sewage in the campus and the overall environment and achieves the expected purpose. Through this case study, the role of aquatic plants in artificial lake in sewage purification and wetland landscape construction was studied, so as to provide theoretical basis for the application of aquatic plants in artificial wetland in water purification.
Index Weight Determination for Road Tunnel Fire Risk Assessment Based on Fuzzy Analytic Hierarchy Process
Authors: Qin Yueping , Kang Na 
Published: August 2019

Abstract
Road tunnel, as an underground engineering, is characterized by unpredictability which has high fire risks in operation process. In recent years, major fire accidents have happened around the world in road tunnel operation process, causing enormous casualties and economic losses. Therefore, it is very necessary to assess fire risks during the road tunnel operation process. In this paper, an index system of road tunnel fire risk assessment with different categories of assessment indexes is established. Index weight is introduced to show the importance of each assessment index for assessment object. This paper adopts fuzzy analytic hierarchy process (FAHP) to express index weight with qualitative description language through pairwise comparison. Qualitative description language given by experts are indicated by correlative triangular membership function. Finally, through defuzzification and normalization, triangular fuzzy numbers are converted into final weights to establish the fire risk assessment index system during the road tunnel operation process.
Study on ammonia injection and mixed element of SCR denitrification system
Authors: Sun Yiqing , Liu Xiuru , Xue Fangming , Su Jingcheng , Chen Feng 
Published: August 2019

Abstract
Selectivce Catalytic Reduction (SCR) denitrification is the most widely used flue gas denitrification technology for coal-fired power plants due to its excellent comprehensive performance. The key to the denitrification efficiency is the uniform mixing of the reducing agents NH3 and NOX in the flue gas. In this paper, the linear controlled ammonia injection grid, partition-controlled ammonia injection grid and mixed element of type ammonia injection grid are compared. The advantages and disadvantages of various gas flow field uniformity adjustment techniques are analysed. It is pointed out that the mixed element of type ammonia injection grid technology is the main direction of the current ammonia injection technology development. Finally, the future development trend of the ammonia injection mixing device is pointed out.
Common Air Pollutants and Their Prevention in Digital Archives
Authors: Li Xiaoxiang , Yin Xianhao , Gu Tiantian 
Published: August 2019

Abstract
The long-term preservation and utilization of archives make them vulnerable to harmful substances, reducing the storage and service life of archives. Meanwhile, these harmful substances are released into the air, which poses a threat to the health and safety of archivists. This paper analyzes the common air pollutants in the digital archives and proposes some solutions.
Evaluation of Sustainable Development of Eco-environment in Tianjin
Authors: Hu Biao , Zhang Jinhui 
Published: August 2019

Abstract
On the basis of discussing the relationship between urban ecosystem and sustainable development, the evaluation index system of sustainable development of human settlements environment in Tianjin was constructed from four aspects: social development level, economic development level, natural development level and sustainability level. The evaluation index of Tianjin ecosystem and its sustainable development level in recent 10 years were calculated by simple arithmetic average method. The relationship between sustainable development of ecosystem and economic development in Tianjin was quantitatively evaluated. The results show that the ecosystem of Tianjin is developing in a sustainable direction, basically in line with the stage of economic development, but there are still some shortcomings which need to be improved urgently.
Preparation and photo-degradation performance of composite catalysts
Authors: Wan Lijuan 
Published: August 2019

Abstract
Through facile mixing and heating method, g-C3N4 and ZnO organic – inorganic composite with varying the content of g-C3N4 has been synthesized. The composite catalysts were characterized by X-ray diffraction, BET surface area measurements and etc. The activity of composite photocatalyst g-C3N4–ZnO with 50% or 70% g-C3N4 for photo-degradation of MO is higher than that of either single-phase g-C3N4 or ZnO under visible light irradiation. Due to the enhancement of electron–hole separation, the as-prepared organic-inorganic composite exhibits an improved photo-degradation performance.
Analysis of Environmental Technology Efficiency of the China on Logistics Industry Considering Resource and Environment Constraints
Authors: Fan Duoduo , Yuan Qingmin 
Published: August 2019

Abstract
In recent years, the logistics industry of China has developed rapidly, and its productivity has shown a rising trend. Considering the resource and environment constraints, China’s logistics industry environmental technology efficiency is also one of the research topics of Chinese scholars. Experts and scholars discuss the environmental technology efficiency of China’s logistics industry from different angles, and effectively protect the environmental protection of the logistics industry of China. In order to promote the logistics industry economy and the vigorous development of resources and environment, this paper will be based on the analysis of the environmental technology efficiency of China’s logistics industry, which is constrained by resources and environment, and provide effective reference suggestions.
Analysis of the correlation between ecology and economy in Dianchi Lake Basin
Authors: Li Dan , Li Yuebo 
Published: August 2019

Abstract
Whether the ecological environment of Dianchi Lake Basin can run well or not is directly related to the smooth implementation of the sustainable development of Kunming City and even Yunnan Province. Without a benign ecosystem in the Dianchi Basin, there would be no rapid socio-economic development in Kunming. This paper analyses the relationship between social and economic development and ecological environment in Dianchi Lake Basin, and explores the relationship between them, which will be helpful to the theory and practice of economic development and ecological construction in Dianchi Lake Basin.
Analysis of Impacts of Extreme Precipitation in Kaizhou on Wanzhou-Dazhou Expressway Transportation
Authors: Liu Shouwen , Han Shigang , Xu Yanping , Li Zhen 
Published: August 2019

Abstract
Based on the rainfall data of Kaizhou, the characteristics of extreme precipitation in Kaizhou from 1960 to 2016 and its influence on transportation are analyzed. The results show that, the number of rainy days was noticeably large before 1980s in Kaizhou, and the number of rainy days was more than 200d from 1973 to 1979. However, the number of rainy days decreased rapidly and basically kept stabile below 150d after 1980s. The threshold value of extreme precipitation events is 20mm in Kaizhou, and the annual average value of extreme precipitation events is 18d. The western Pacific subtropical high pressure extended westward in 2006, and inclined to the west and north, compared with the previous years. Besides, it was stable and maintained for a long time. These gave rise to severe drought in Chongqing in 2006 and further resulted in the decrease of extreme precipitation events in Kaizhou in 2006. There are 3 dangerous areas where weather influencing factor is extreme precipitation in Kaizhou section of Wanzhou-Dazhou Expressway, and they are located at S002 K9+593-K20, S002 K0-K9+593, and S002 K20-K30. Kaizhou section of Wanzhou-Dazhou expressway suffered 7 road closure controls due to extreme precipitation from 2011 to 2014. In 2014, 4 road closures were caused due to frequent extreme precipitation. Strengthening the forecast of extreme precipitation events can reduce occurrence frequency of traffic accidents and give play to the maximum effect of road transportation.
Heavy metal pollution and spatial distribution in Surface Water and Sediment of Nanchang Section of Ganjiang River
Authors: Shi Xianluo , Zhang Wei 
Published: August 2019

Abstract
In order to reveal the spatial distribution and pollution characteristics of heavy metals in surface water and sediment of Nanchang section of GanJiang River in JiangXi Province, potential ecological hazard index method and ground accumulation index method were used to evaluate the risk of heavy metals. The results show that: 1) The concentration of heavy metals in surface water of GanJiang River is much lower than the first standard limit of “Surface Water Environmental Quality Standard GB3838-2002”. 2) The average RI value of sediment in Nanchang section of GanJiang River is 144.21, and the total ecological risk level is very high. The RI of two sections of Bayi Bridge are 169.89 and 192.38, respectively, which have become potential ecological high-risk areas. 3) According to the method of accumulative index, the pollution degree of heavy metals in GanJiang River is as follows: Cu > Cd > Pb > As > Cr > Zn. Among them, Cu and Cd are the main pollutants. Relevant departments should take urgent measures to strengthen the environmental management and pollution control of GanJiang River.