bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on Reservoir Heterogeneity of Putaohua Oil Layer in Gulongnan Area
Authors: Lv Yajuan 
Published: January 2021

Abstract
Putaohua oil layer is the main target layer in gulongnan area. The reservoir is mainly sheet sand with thin thickness, heavy mud content and poor physical properties. In recent years, the development effect of different blocks in this area is quite different. In this paper, the reservoir heterogeneity in Gulongnan area and each block is studied to provide reliable geological basis for improving oilfield development effect. Through the analysis of intra-layer, inter-layer and plane heterogeneity, it is considered that the overall reservoir heterogeneity in Gulongnan area is strong. In terms of deposition units, the heterogeneity of PI1, PI3 and PI6 is relatively strong, while the heterogeneity of PI2 and PI7 is relatively weak, and the remaining units are in between. In terms of zoning, the heterogeneity in G6 block is weak, the heterogeneity in M1 and A1 blocks is strong, and the heterogeneity in D1 block is the strongest. The application of heterogeneity analysis results provides strong support for promoting oil well effectiveness and delaying water breakthrough time.
Study on spatial-temporal dynamic change of vegetation coverage and its influencing factors in blue economic zone of Shandong Peninsula: taking Qingdao as a case
Authors: Liu Fangyu , Xiao Xingyuan , Shang Luxiang , Huang Xiao 
Published: January 2021

Abstract
The vegetation cover of Qingdao city has changed significantly under the dual influence of climate change and the implementation of blue ocean strategy. The spatial- temporal dynamic change characteristics of vegetation coverage in Qingdao were quantitatively studied on the county-level scale and the man-made and natural driving factors were analysed spatial-statistically by using the dichotomy pixel model Based on Landsat remote sensing data of Qingdao in 2000, 2008 and 2016. The results suggest that: (1) the overall evolution of vegetation coverage declines from 65% to 63% from 2000 to 2016. (2) Significant spatial difference of vegetation coverage is found at the county scale. The vegetation coverage of Jiao Nan increased, while that of Jimo decreased from 2000 to 2008. Jiao Nan had the highest vegetation coverage between 2008 and 2016, while Jiao Nan, western Jimo and Pignut all increased significantly. The vegetation coverage of eastern coastal urban area dropped dramatically to reach the lowest record in each phase of the three-year data. (3) The influence of climate factors on vegetation coverage is not significant, while the human activity is the leading factor causing the evolution of vegetation coverage in Qingdao where urbanization is negatively correlated with the change in vegetation coverage. Furthermore, population migration also has an impact on the vegetation coverage.
Protective Workover Fluid for Biological Limestone Reservoir in Dagang Oilfield Technology Research
Authors: Yang Xiaochun , Xu Xiaogang , Wang Xiaofang , Fan Songlin , You Qiuyan 
Published: January 2021

Abstract
Due to the development of the biogenic limestone Cracks of reserves and dual-media, the pore permeability is larger different, the sensitivity is strong, and the risk of lost circulation is large, which leads to the serious formation pollution caused by the lost circulation. According to the reservoir characteristics, the temporary blocking system has been developed, Its temporary blocking component size expanded to 5μm∼2.0mm, Block size expanded from 0.2mm to 1.0mm, the limestone temporary blocking rate’s minimum is 90%, invasion depth of sand bed is less than 3 cm, temporary blocking component degradation rate is higher or equal to 90%. Excellent technical application, the average recovery period of the pump well was reduced from 7 days to 3.7 days, and the recovery rate was increased from 70% to 97%.
Experimental Study on Residual Bearing Capacity of Existing Prestressed Concrete Hollow Slab Beam
Authors: Wang Baoqun , Xing Dejin , Chen Chengyong , Tian Zhongnan , Xu Gangnian 
Published: January 2021

Abstract
Through the reconstruction and expansion of expressway, it has become the new normal of expressway construction in China to improve the traffic capacity and operation service level of the existing road. However, the reconstruction and expansion of expressways are faced with problems such as the degradation of the existing bridge performance and the original design bearing capacity that can’t meet the current load standards, which restrict the full utilization of the existing expressway bridges. Based on the reconstruction and expansion project of Beijing-Shanghai Expressway (Shandong section), this paper selects the prefabricated and prestressed concrete (PC) simply supported slab bridge with span of 10m and 13m. It evaluates the bearing capacity of HSB based on technical condition checking calculation and load test, and carries out the ultimate bearing capacity test at the same time. According to the checking calculation of bearing capacity and test results, it is concluded that the technical condition of the existing bridges in the expressway (Shandong section) is evaluated as class 1 prefabricated simply supported slab bridge. By adding 150mm integral cast-in-place pavement, the bending capacity of the HSB in the mid of span section meets the current load standard, while the shear capacity of supporting point section does not meet the current load standard, but the difference is within 5%. After the reconstruction and expansion of expressway, the existing bridges mainly bear the load of small vehicles, the load effect is far lower than the current load standard, the bearing capacity meets the current load standard, and can be fully utilized in its original state.
Comprehensive identification method of volcanic gas and water layer in Anda area
Authors: Yang Qin 
Published: January 2021

Abstract
The structure of Anda area is located in the north of Xujiaweizi fault depression, which is a NNE trending depression, with west fault and East exceeding. The main target reservoir in this area is volcanic reservoir of the third member of Yingcheng formation. The reservoir lithology is complex, the physical property changes greatly, and the heterogeneity is strong, which brings some difficulties to the gas and water layer identification in this area. Due to the special influence of lithology and pore structure of volcanic rock, the relationship between gas and water in volcanic reservoir is relatively complex. Gas wells show different productivity characteristics and water production characteristics in the production process. Based on logging, logging and gas testing data, this paper analyzes the response characteristics of gas and water layer logging, establishes gas and water layer identification chart, comprehensively identifies gas and water layers, further deepens the understanding of gas reservoir geology in this area, and improves the gas well development efficiency.
Research on Marine Disaster Prevention and Mitigation Information Platform System Based on Big Data
Authors: Chen Chen , Yuxi Sun , Jun Tan 
Published: January 2021

Abstract
Affected by human activities, marine pollution is becoming more and more serious. Our coastal zone, estuary and bay ecosystems have been damaged to varying degrees. The application of marine ecological environment monitoring sensors can realize real-time monitoring and rapid early warning of the marine environment, which is of great significance for preventing marine disasters and regulating the contradiction between the development of the marine economy and the environment. Based on this research background, the thesis used TERRA/AQUA-MODIS, SARCOSMO-1/COSMO-2 and HY-1B satellite, aviation, ship, shore-based and other multi-source, multi-temporal monitoring data to build a centralized marine environment monitoring and information extraction The integrated business system integrated with functions such as integration, data collection, forecasting and early warning, and product release provides timely information on the ecological environment to the government and relevant departments during the emergency period, providing vigorous technology for disaster prevention and mitigation of the government and relevant departments The guidance provided a basis for starting the emergency plan in time.
The Development of Diesel Particulate Filter Technology
Authors: Wang Zhibin , Liu Peng , Li Haiming , Li Rui , Pan Xiaobing , Zhao Yu 
Published: January 2021

Abstract
With the rapid development of internal combustion engine technology and the widespread popularity of diesel locomotives, the exhaust pollution of internal combustion engines has become a factor that cannot be ignored in air pollution. Particulate matter in diesel engine exhaust is an important culprit in diesel engine exhaust pollution, the harm of which has been widely recognized. This paper introduces the hazards of particulate matter in diesel exhaust, and summarizes DPF for particulate emissions and the regeneration technology of DPF.
Study on biodiesel synthesis based on Micro-organism Community
Authors: Zheng Chaocheng 
Published: January 2021

Abstract
In this paper, microorganism for high lipase productivity was screened before purification, immobilization for biodiesel synthesis. High lipase producing strains such as Candida, Bacillus, Aspergillus, Pseudomonas sp. were screened and selected from oil-polluted soils. Micro-organisms were cultured for about two days after the elution of 100000-fold, among which the best showed higher hydrolysis ability on fatty acid glycerides. Lipase productivity was improved 10-fold by mutation methods of ultraviolet treatment, and the most suitable time for treatment was 30 s. Furthermore, NTG was utilized to strengthen this mutagenic effect before selecting four strains with higher lipase productivity. These micro-organisms were cultured at their best conditions, which resulted in high lipase production after one day fermentation in 50 mL container at 29 °C.
Study on enzymatic activity and lipase catalysis by lipase high-yield strain
Authors: Zheng Chaocheng 
Published: January 2021

Abstract
In this paper, microorganism for high lipase productivity was screened for immobilization in biodiesel synthesis. Strains with high lipase productivity were analyzed at nucleic acid level with special universal primes. In addition, reaction course, theory of lipase adsorption, lipase specificity on substrate, kinetics, and the application of enzymatic synthesis in biodiesel were investigated. The tests of lipase productivity, lipase purification, lipase immobilization, and lipase application in biodiesel were carried out indicating that lipase from the above micro-organisms was able to catalyze the transesterification reaction of rapeseed oil with moderate oleic aicd content.
Study on Ultrafiltration-Reverse Osmosis Technology in The Treatment of Deep Ocean Water
Authors: Gao Chunjuan , Wu Haihong , Guo Shuyuan , Zhang Yanan , Ma Laibo 
Published: January 2021

Abstract
As a high-quality water resource, deep ocean water (DOW) has aroused widespread interest. In this study, ultrafiltration-reverse osmosis technology was used to desalinate deep ocean water to prepare pure deep ocean water. By controlling the process conditions, the ultrafiltration-reverse osmosis system obtained a desalination rate of 98.3%, and the product water met the requirement of relevant standards.
Joint Optimal Operation of Wind Power Plant and Cascade Hydropower Station
Authors: Jiang Di , Wang Mingkai , Sun Wentao , Wu Yang 
Published: January 2021

Abstract
With the depletion of fossil energy, the whole people advocate energy conservation and emission reduction, making the scale of wind power integration increase. While wind power has fluctuating and intermittent characteristics, this paper develops a short-term combined operation strategy of wind and water using the flexible regulation characteristics of cascade hydropower stations. To ensure full access to wind power, reduce the impact of wind power fluctuations as little as possible. A multi-objective short-term optimal scheduling model with the minimum variation of combined wind and water output and the largest total power generation is established considering the constraints of storage capacity, discharge flow, reservoir water level, output of each power station, and power transmission section. Aiming at the shortcomings of traditional particle swarm optimization algorithm, such as slow convergence rate and fall into optimal local solution easily in the late search, dynamic inertia weight and learning factors are introduced and applied to model solving. The simulation results show that the cascade hydropower station can effectively stabilize the wind power fluctuation, improve the wind power consumption level, increase the power generation of the system, and ensure the safe and stable operation of the power system.
Research on the Development of Chinese and Foreign Denture Technology
Authors: Chen Lijuan , Zhao Yifan 
Published: January 2021

Abstract
Dentures are often referred to as "dentures". Just like the "prosthetic leg" and "prosthetic limb" are called "prosthetic limb", it is a general term for the restoration made after the missing of some or all teeth of the upper and lower jaw teeth in medicine. In recent years, with the improvement of living standards and the abundance of material life, more and more people will choose to install dentures after missing teeth, and denture technology has also developed rapidly. This article is in recent years. A brief investigation and research was carried out on the development of science and technology.
Research on Pressure-based Detection Technology for Partial Overheat Insulation Defect of Oil-less Power Equipment
Authors: Yu Qunying , Liu He , He Qiuyue , Zhang Guozhi , Zhang Zheliang , Zhang Xiaoxing 
Published: January 2021

Abstract
Pressure monitoring technology is the current state monitoring research hotspot of oil-less power equipment. Aiming at the lack of pressure change characteristics caused by overheating insulation defect of oil-less power equipment, this paper studies the pressure change characteristics of 110kV oil-immersed power transformer under local overheating insulation defect. Overheating defect belongs to the low temperature overheating, temperature rise gradient is 50 °C . Analysis of the experimental results indicates that pressure change trends show exponential, in the initial stage, the pressure increased sharply, then it increased slowly, and finally it tended to be stable; the increase of pressure in 50 hours ranged from 1kPa to 3kPa, and the pressure increase was obvious, which indicated that the online monitoring of local overheating insulation defects of the casing could be achieved by pressure monitoring technology, and finally the casing pressure change law was analyzed theoretically.
Using Spatial LMDI to Decompose Electricity Consumption Intensity in Shandong Province from 2015
Authors: Xue Wanlei , Zhao Xin , Yang Yongqi , Jia Mingzhu , Sun Xiangdong 
Published: January 2021

Abstract
In this paper, through the construction of spatial LMDI decomposition framework, we decompose the influencing factors of Shandong Province's total electricity consumption intensity from 2015 to 2018 into two parts: city’s economic growth factor and city’s electricity consumption intensity factor. The results show that, in this period, the increase of city’s electricity consumption intensity is the main reason for the increase of total electricity consumption intensity in Shandong Province. However, the city’s economic growth slightly slow down the increase of the total electricity consumption intensity. Compared with other cities, the growth of electricity consumption intensity in Binzhou is the main driving force of total intensity growth, accounting for 69.35%. However, 6 cities (Dezhou, Jining, Jinan, Laiwu, Liaocheng, Zibo) play a negative role in the rise of Shandong's overall electricity consumption intensity.
A new site selection method applied to Synchronous condenser’s suppressing transient over-voltage at the sending end of new energy resources
Authors: Zhao Mengyang , Tang Xiaobo , Wang Yu , Wang Qilun , Sun Zhongqing 
Published: January 2021

Abstract
The transient over-voltage will occur in the wind farm near the DC system after commutation failure. In order to reduce the transient over-voltage of wind power plant after the accident of off - grid, improve the stability of the system. This paper mainly studies the placement of the Synchronous condenser in the wind power station. Firstly, the advantages of the Synchronous condenser are analyzed theoretically, and the operation characteristics of the Synchronous condenser under the fault of the DC system are analyzed in detail. Secondly, based on the transient over-voltage area method, a transient over-voltage degree index is proposed, and this index is used as the optimal placement method. Finally, the proposed transient over-voltage index was verified in the PSD-BPA model. The results show that the index is correct and effective in determining the placement point of the Synchronous condenser in the new energy supply.
Research Status of Gesture Recognition Based on Vision: A Review
Authors: Tian Jun , Zhang Weilie , Zhang Tao , Li Guopeng , Long Zhang 
Published: January 2021

Abstract
Gesture control, as a new type of interactive method, has the characteristics of rich expression, convenient control, and fast. It has huge application prospects in entertainment, home furnishing, and industry. Gesture recognition is the basis of gesture control. Gesture recognition technology based on visual detection acquires gesture information in a non-contact manner, which enables the operator to have a better operating experience and is favored by scholars at home and abroad. In order to fully understand the existing research methods of visual gesture recognition, firstly, the basic process of visual gesture recognition is explained. According to the principle of the gesture recognition method, it is divided into gesture recognition based on traditional methods and gesture recognition based on deep learning. And the specific methods are analyzed and summarized in detail. Finally, the technical difficulties of visual gesture recognition are analyzed and discussed, and the development trend of gesture recognition based on vision is prospected.
Experimental Study on Mixing Time under Different Operation Parameters in CAS Process
Authors: Han Lihao , Li Yuehua , Han Lining , Liu Yanxia , Huang Weiqing , Qi Suci , Guan Xin , Yuan Jianlu 
Published: January 2021

Abstract
In view of the problems existing in bath mixing, a water model has been established to study the mixing time of CAS process on the basis of similarity principle. In this paper, the influences of the bottom blowing position, bottom blowing rate, the immersion depth, the position and the size of the impregnation cover on bath mixing time have been investigated in detail. To ensure the amount of slag in the impregnation cover as little as possible, it would be better that the slag area is equal to the diameter of impregnation cover. The optimum bottom blowing position is located at 0.5r, the bottom blowing rate is between 0.18 m3/h and 0.22 m3/h, and the immersion depth of impregnation cover is about 60 mm.
Assessment of Electrical equipment status in distribution network based on multi-source data fusion
Authors: Chen Shaonan , Liang Shuo , Li Shan , Zhou Yangjun , Yu Xiaoyong 
Published: January 2021

Abstract
In order to adapt to the lean maintenance and operation and maintenance requirements of the distribution network, and to improve the utilization of distribution network data, a method for identifying the operating status of distribution network equipment based on multi-source data fusion is proposed. First, the status identification and evaluation requirements of the network and equipment in the operation of the distribution network are analyzed. Then the multi-source data fusion principal is introduced, and the multi-source information sources of the distribution network equipment is explained. An identification method for the state of distribution network equipment based on association rules and entropy weight method fuzzy analysis is proposed, and the evaluation and identification process is given. Finally, the transformer equipment is taken as an example to verify the equipment status identification method proposed in this paper, and demonstrate the effectiveness of this method.
An Active Power Failure Early Warning Probability Model Based on Support Vector Machine Algorithm
Authors: Wang Yongming , Li Yiran , Liang Hongchi , Weng Xiaochun , Huang Meimei 
Published: January 2021

Abstract
The occurrence of power grid blackout will cause major production equipment damage, cause major economic losses, or even cause casualties in some extremely serious cases. It is necessary to upgrade the technology of traditional power grid so that emergency measures can be taken when unexpected cascade failure occurs. In this work, an active power failure warning probability model is proposed for smart grid warning system. First, probabilistic evaluation of system performance is carried out to generate the historical database required by cascade state. Then, the support vector machine (SVM) algorithm is used to train the historical database, and power failure is predicted by the support vector machine (SVM) binary classifier. Finally, the proposed model is validated by IEEE 30 node system. The proposed model can well understand the essence of cascade failure and can proactively predict cascade failure, which is helpful for the planning and maintenance of power grid system.
Research on Key Technology of Primary Protection System in Intelligent Substation
Authors: Wen Kaijun 
Published: January 2021

Abstract
The smart substation in this paper is a model. Through the research of its primary system, the project construction scale and design scope, electrical main wiring, short-circuit current and main equipment selection, insulation coordination and overvoltage protection, cable facilities, power distribution equipment, etc. To conduct research. Analyze application status detection, fully optimize design, and improve operation and maintenance management. Combining the online monitoring and sequential control operation of the intelligent substation, the research of the secondary protection design scheme is carried out. It analyses the system dispatch automation, integrated power supply system, system and station communication, secondary equipment cabinet and layout, component protection and automatic equipment, etc., focusing on online monitoring, sequential control operation and operation and maintenance management. With the maturity of online monitoring technology, the realization of sequence control operation technology and the application of optical fibre network in real-time systems, the safety level and operation and maintenance management of smart substations will surely be better improved.