bluuebunny/crossref_metadata_2025_split huggingface dataset:
Well Factory Practice in Bailu Lake Cluster Wells
Authors: Zhao Hongshan , Sun Jianxiang , Xu Yunlong 
Published: April 2020

Abstract
It is very difficult to economically develop Bailu Lake low permeability reservoir, facing severe anti-collision challenge, as well as trajectory controlling and cuttings carrying of high difficulty, beyond that the reservoir located in the scenic area, where the well site area was limited and the environmental protection requirements were very strict. On the basis of learning the foreign companies’ successful experience on cluster well factory, the authors analyzed the situation and difficulties of Bailu Lake well factory project initially, thus proposing Bailu Lake well factory overall optimized scheme, including slot drilling sequence and trajectory optimization. Through fast rig moving technique, PDC bit and motor optimization and high inhibitive and environment friendly CaCl2 mud system, the rig moving time was shorten by 2 days averagely and one run safe drilling in the second spud. Finally, the total 43 wells were successfully completed, and the average well drilling cycle was shorten by 15.49 days, which had achieved good effects.
Marine Reverse Osmosis Desalination Plant Operation-A Case Study
Authors: Fang Zhigang , Shu Haiping , Cao Jingyi , Li Liang , Yang Yueping 
Published: April 2020

Abstract
In the present work, a type of marine reverse osmosis desalination plant with 20t/d product operated at different condition (temperature, operation pressure, TDS) was studied. Within the different operation conditions, the TDS and flow rate of permeate change in relation to the operation pressure, temperature and TDS of seawater. The study shows that when the TDS of seawater is higher than 40000ppm or when the temperature of seawater is higher than 35°C, the TDS of permeate is higher than 500ppm and as such the permeate is not suitable for drinking. To satisfy the drinking water supply, two-level reverse osmosis or refrigerator for cooling the inlet water were suggested.
Quantifying Analysis of Hydrological Conditions Dynamic Alteration and its Multiple Influencing Factors
Authors: Leng Jiwei , Fu Yicheng , Zhao Jinyong 
Published: April 2020

Abstract
Hydrological condition is of great significance to river ecosystems. Alteration in hydrological conditions can directly or indirectly affect ecosystems, causing changes in river ecological health, species habitats, and water-sand relationships. In this paper, the Index of Hydrologic Alteration-Range of Variability Approach method (IHA-RVA) method was used to evaluate the alteration of hydrological condition in Yuanshui river from 1959 to 2010 under the combined action of climate change and human activities. We have reached the conclusion that the current hydrological condition alteration in the Yuanshui River Basin is moderately changing; Regardless of the water diversion, the contribution rates of natural runoff changes and cascade reservoir operations to hydrological change is 58% and 42% respectively, which were quantified by the multi-series contribution rate segmentation method. It can be seen that the natural runoff change was the leading cause of the change of the overall hydrological situation, and the operation of the cascade reservoir was an important cause of the hydrological situation change.
Research on Forest Health Industry Based on County Economy-Taking the Forest Health Industry in Antu County, Jilin Province as an Example
Authors: Gai Luofan , An Yonggang , Huo Pengfei 
Published: April 2020

Abstract
As an important practice of the “two mountains” theory, the forest health industry has become the new situation and new business form of China’s health industry [1]. However, due to the short development time, there are many problems and deficiencies in infrastructure, resource utilization, and industrial layout. This paper takes the forest health industry in Antu County, Jilin Province as an example, and discusses the important influence of county economy on industry, and discusses the forest health industry.
Information Entropy Embedded Back Propagation Neural Network Approach for Debris Flows Hazard Assessment
Authors: Yu Yan , Wang Jun 
Published: April 2020

Abstract
The purpose of the study is to propose a new method to assess debris flow hazard by embedding Shannon’s information entropy in back propagation neural network. The procedure was divided into two parts. One was to establish a mathematical model for debris-flow hazard assessment based on Shannon’s information entropy forming input and output data sets of back propagation neural network. The other was to establish a back propagation neural network technique for characterizing debris flow dynamic hazard. The proposed method was employed to assess debris flow hazard of Shenxi gully basin, Sichuan province, China. The result shows that the assessed result of proposed method is highly consistent with the result of field surveys. The proposed method can reflect the interaction, nonlinearity and dynamic process of background variable factors and can be used to debris flow hazard assessment, risk management and mitigation of debris flows.
Investigating the Dynamics of Rainfall and Temperature in Three Selected Districts in Ghana: A Quantile Autoregression (QAR) Model Perspective
Authors: Gbolonyo Kweku Patrick , Osabutey Wisdom , Li Lu , Yang Xiaorong 
Published: April 2020

Abstract
In this paper, the quantile autoregressive (QAR) model was employed to estimate and investigate the dynamics of average rainfall and temperature within different quantile levels/points, according to the monthly year-on-year average rainfall and temperature indices from three selected districts in Ghana from January 2000 and February 2018. It was found that both rainfall and temperature series are stationary across the three districts in Ghana. And we also observe a statistically significant inverse association among rainfall as well as temperature across the three selected districts in Ghana. It was evidenced that the estimated autoregressive coefficients across the three districts presume different values alongside the conditional distributions of rainfall and temperature indices. And the unit root test indicates the general or absolute stationarity of the series.
Dynamic Change Monitoring of Coastal Environment Based On Domestic GF Images
Authors: Li Pengfei , Huang Mutao , Wang Jinmeng 
Published: April 2020

Abstract
Based on independent GF remote sensing images, DEM data, GIS data and other data resources and computer technology, this paper developed a B/S version of the coastal zone environmental dynamics monitoring system for on-line monitoring of coastal land type changes. This paper selects the coastal zone of Wenchang City in Hainan Province as a research object, and uses remote sensing technology and post-classification change monitoring methods to perform online pre-processing and change monitoring for the GF remote sensing images of 2016 and 2018, and demonstrates the obtained coastal land change results in the form of graphs. By analyzing the graphs display results, can clearly understand the changes in the land types of the coastal zone, and effectively provide the basis for government departments to govern the sea environment.
Study on the Influence of Layout of Double Coal Seam Working Face on Overlying Strata
Authors: Sun Xueyang , Zhang Qi , Li Cheng , Zhang Lei 
Published: April 2020

Abstract
The design of mining face is very important, it is not only an basis for rational and effective coal mining, but also affects the subsidence area and surface environment of overlying strata.Taking a coal mine as an example, study the development law of coal mining subsidence under the condition of double coal seam mining by means of the combination of similar material simulation experiment and numerical simulation. The results obtained by the two methods are basically the same. The larger the width of the coal pillar, the smaller the overlapping area of the upper and lower coal seam, and the smaller the influence range of coal seam mining deformation and failure. It is suggested that the mining time and mining distance of the two coal seams should be extended, the width of coal pillar should be increased, so as to slow down the deformation and damage range of overburden, and protect the surface ecological environment.
Dendroremediation of Metal and Metalloid Elements with Poplar and Willow in the Floodplain Area Downstream a Mining Hill, Tongling, China
Authors: Kataweteetham L , Rong G , Zhu J , Chu Y , Liu Shengquan 
Published: April 2020

Abstract
Practical remediation technology is in great need to reclaim the land polluted with heavy metals and metalloids. Dendroremediation, the use of trees to remove pollutants from the environment is a cost-effective and eco-friendly technology. In this study, poplar and willow growing on the floodplain downstream a mining hill in Tongling city, China, as well as local soils were sampled to access the phytoextraction ability of different parts of the two tree species on Cu, Zn, Cd and As. The results showed that both species of the trees grew well in spite of the stress from the high content of the toxic elements, especially Cd and As. The root, bark, trunk, and branch of both species demonstrated Bio-concentration Factors (BCFs) of the four elements between 0.001 and 0.5, with Cu and Zn having higher BCFs than that of the other two elements and the bark and root having higher BCFs than the trunk and branch. Poplar showed relatively higher averaged BCFs than willow for all the elements, except As, while willow had higher averaged Translocation Factors (TFs) than poplar. Though both species are not hyperaccumulators for these elements, they were considered suitable for soil remediation and forestation in this region.
Is/Are Customer Satisfaction and Trust Mediating Factors of Loyalty for OTA---from China’s Case?
Authors: Chen Jianbin , Lin Yanqiao 
Published: April 2020

Abstract
The author studies the influencing factors of OTA customer loyalty by taking Qunar and Ctrip as an example. Based on the relevant theories, the author constructs a SEM model that affects OTA customer loyalty, including information ease of use, products and services, risk, switching costs as independent variables, satisfaction and trust as intermediate variables, and loyalty as dependent variables. Through questionnaire survey, data collection and analysis show that product and service, switching cost have a significant positive impact on customer satisfaction, trust and loyalty. Among them, the switching cost has the biggest effect on customer loyalty and trust. Products and services have the greatest impact on customer satisfaction. Satisfaction and trust have a significant positive impact on loyalty. As intermediary variables, pre-variables can indirectly affect OTA customer loyalty through satisfaction and trust.
Sea Natural Resource Potential for Blue Growth Policy Implementation in Baltic Sea Region
Authors: Pudzis E. , Geipele S. , Geipele I. 
Published: April 2020

Abstract
The goal of the research is to investigate and to identify effective Blue RIS3 implementation measures and best practices in the six participating Baltic Sea regions and to synthesize the findings in one research paper. The analysis aims at finding important aspects and conditions for future Blue Growth and RIS3 implementation in Baltic Sea. This resaerch lead to answerng question – how to susatianably and in the smart way use Baltic Sea natural resurces to create smart and economicaly growing region within European Union.
Evaluation on Green Transformation Competitiveness of Oil-gas Resource-based Cities in China
Authors: Sun Mingming , Yang Xiaolong 
Published: April 2020

Abstract
The green transformation is an important direction of the transformation of oil-gas resource-based cities. From the three aspects of environmental protection, resource utilization and transformation, a comprehensive evaluation index system for the competitiveness of the green transformation of oil-gas resources-based cities has been established, and the entropy method has been used to determine the index weights and the correlation matrix method to calculate the comprehensive evaluation score. The green transformation competitiveness of 10 typical oil-gas resources-based cities in China is evaluated. The results show that the green transformation effect of oil-gas resources-based cities in China is generally not obvious. Different cities have very obvious differences in transformation structures.
Urban Wind Energy Evaluation–A Case Study in NCUT Campus
Authors: Wang Biao , Sun Shuai 
Published: April 2020

Abstract
Urban wind energy exploitation is beneficial for a green city. This article takes a case study of a university campus and evaluates the wind resource over three most potential buildings in the campus. Long-term wind data collected over roof was used as wind rose to offer wind initial condition for CFD numerical simulation. Eight sessions with corresponding wind data were considered for simulation of wind environment of the whole campus. Weighted wind velocities at 6m and 10m above roof of the three chosen buildings were compared. With correction coefficient from values got from simulation and measurement, relative true wind velocities above the three buildings were found mostly more than 3 m/s. One building was taken with detailed evaluation with wind turbine installation and the payback period is 24 years, which is feasible and worthwhile to exploit wind energy in this campus.
Establishment and Experimental Analysis of Runtime Humidity Soft Sensing Model of PEMFC Based on Internal Resistance
Authors: Tan Baohua , Xiao Tengfei , Quan Rui , Quan Shuhai , Chen Hongbin 
Published: April 2020

Abstract
The internal humidity is very important in Proton Exchange Membrane Fuel Cell, but it cannot be measured directly because of the closed structure of the cell. It has been proofed that humidity has strongly contract with some internal parameters such as resistance, temperature and gas pressure. After studying and analysis on classical humidity mechanism models, this paper operated some experiments on PEMFC runtime humidity based on soft sensing technology, then established and test humidity soft sensing model based on runtime internal resistance. The experiment results shown that the output value of soft sensing model matched well with the theoretical calculation data. And the errors were almost within 1%. It verified the effectiveness of soft sensing model based on internal resistance.
Optimization Design of AC Filters for HVDC Systems Based on Improved Particle Swarm Optimization Algorithm
Authors: Wang Chengliang , Shi Fan , Wang Honghua , Yang Qingsheng 
Published: April 2020

Abstract
In order to reduce the adverse effect of harmonic currents on AC systems and ensure the effective transmission of power in high voltage direct current (HVDC) transmission lines, AC filters (ACF) must be installed on AC buses. Aiming at the limitations of current design methods for AC filters in HVDC systems, this paper proposes a new optimization design method using improved particle swarm optimization (PSO), which aims at the cost of filter investment and constrains the total harmonic distortion rate of AC bus voltage and the telephone harmonic form factor. The optimization mathematical model of AC filters is established, then an improved PSO algorithm is proposed to achieve the optimal design of AC filters. This algorithm introduces a mutation operator and the constraint processing mechanism to improve the exploration ability of this algorithm. Lastly, the simulation model of the ±500 kV HVDC system is established, and the simulation results show that the AC filters optimized by improved PSO have the lowest investment cost while satisfying the harmonic restriction standard.
Simulation Analysis of the Sugarcane Leaves Cutting Process of the Electric Returning Machine
Authors: Lin Yisen , Wen Fujun , Yu Meng , Tang Yanqin , Hu Kun , Wang Yuxing 
Published: April 2020

Abstract
In order to improve the sugarcane leaves cutting effect of electric sugarcane leaves returning machine, the sugarcane cutting process is modelled and simulated by ANSYS/LSDYNA software. It shown that in the double-support cutting mode, the cutter roller ensures the multi-layer sugarcane leaves were cut at the rotate speed of 800 rpm. During the cutting process of sugarcane leaves, the stress is mainly concentrated at the incision, and the sugarcane leaves on the side of the blade are subjected to greater stress. The smaller the distance between the rotary blade and the fixed blade of the same combination, the easier the sugarcane leaves are cut off. In the cutting test of sugarcane leaves, the cutting rate was 91.47%, which echoed the simulation results, indicating that modelling and simulation have reference value.
A Phenomenon Study on Spreading and Evaporating Process of Droplet on DBD Actuator for Wind Turbine Anti-icing
Authors: Chen Zhao 
Published: April 2020

Abstract
This paper reports on the phenomenon of the unique spreading and evaporation process of water droplets on the surface of a dielectric barrier discharge (DBD) actuator. High-speed photography was used to capture the droplet spreading dynamics, and the temperature field evolution was characterized by infrared imaging. On the DBD actuator, the maximum spreading diameters of the droplets are shown to be increased by ∼95%, and the contact angles decrease from 58º to 13º, indicating that the DBD plasma significantly increases the hydrophilicity of the actuator surfaces. It is also revealed that the evaporation time induced by the DBD plasma is 6.54 times faster than that of an electric heater. It is argued that coupled effects of the hydrophilicity caused by plasma and the heat flux in the streamers bridging the electrodes and the droplets should be the crucial points of plasma evaporation physics of impinging water droplets, which are especially meaningful in anti-icing applications.
Simulation Analysis of Water Vapor Condensation during Tire Capsule Vulcanization
Authors: Lu Shuzhen , Chen Songying , Cao Yang 
Published: April 2020

Abstract
Even the vapor vulcanization technology has developed a lot. The uneven temperature distribution caused by the condensation water inside the capsule still exists. In this paper, a numerical simulation study was conducted on vapor condensation of tyre capsule. Using a simplified two-dimensional model, after the 240s calculation, we analysed the result. The result shows that there was flow inside, and it was mainly induced by the condensation water flowing down the wall after it had been produced on the wall. The height of the condensed water layer is about 4.0mm. The volume of condensed water in three dimensions is about 240ml, which results in uneven temperature distribution. The temperature of the wall area with condensed water is about 3 to 13 lower than other wall areas, and the maximum °C°C temperature difference occurs at the deepest part of the condensate layer.
Research on the Cost Control Model of Power Gird Maintenance Based on Fuzzy Pattern Recognition Theory
Authors: Ma Xingbin , Zhang Suiyu , Li Moxiao 
Published: April 2020

Abstract
The power grid lines and equipment maintenance of power enterprises is a complicated construction process, the cost of which is affected by meteorological and geographical factors, and the influence mode is uncertain. Using fuzzy clustering method and the threshold intervals of the objective function in clusters, this paper builds a predictive control model to control the project cost. This model uses relative fuzzy operator to build fuzzy matrix, construct correlation between factors, and describe the factors’ effect. Extracting the cluster’s eigenfunction, and defining the boundaries of various clusters, we determined the type of the predicted points and the range of the objective function. When the actual cost of the maintenance project is within the range calculated by the cost model, then it is normal. If the actual cost exceeds this range, then further analysis of all the aspects of the cost is needed to find out the reason.
Research on Multi-function Power Transmitter of AC Sampling Based on Modbus Protocol
Authors: Si Haifei , Hu Xingliu , Shi Zhen 
Published: April 2020

Abstract
It is of great significance for the stability and optimal operation of the power grid to find and control the abnormal conditions in the operation of the distribution system in time. According to the current situation of distribution network and the demand of distribution automation in China, aiming at the problems existing in the cost, accuracy, communication and reliability of distribution monitoring terminal, this paper puts forward a design scheme of distribution monitoring terminal with arm as the control core and high-precision power measurement chip as the data collection core, and designs the serial communication between computer and power transmitter. Communication protocol, and completed the production of the prototype.
Research on Fuzzy Control System for Constant Current Soft Start of Motor
Authors: Hu Xingliu , Si Haifei , Ye Quanyi , Tian Xiaoming , Fang Ting 
Published: April 2020

Abstract
The soft starter is widely used in the starting of three-phase cage asynchronous motors. Because of its small starting current and reduced damage to the grid and motor during the traditional start-up of the motor it is applied in industrial, agricultural and transportation. The starting current of the motor is controlled by intelligently controlling the firing angle of the thyristor to achieve soft start of the motor in this paper. Fuzzy control is added to the system to establish a control model, which enhances the error resistance of the entire system and enhances the robustness, thus continuously improving the entire system. Fuzzy control is applied in this system to control the constant current soft start of the motor, which greatly improves the intelligence of the motor. The system can reduce the starting current, improve its dynamic torque, can effectively suppress the influence of pure hysteresis. In a large number of experiments and practical production work, it can be proved that the fuzzy control system of motor based on PLC has very good stability, can effectively suppress the influence of pure lag, and indeed has very good control effect.
Comprehensive Risk Assessment Method of Power Grid Based on Grey Relational Weight Game Theory
Authors: Lu Dan , Xu Changqing , Zhang Linjuan , Wang Lili , Sun Yanying 
Published: April 2020

Abstract
Taking the risk assessment of power system which include new energy grid and AC/DC hybrid structure as the research object, the paper proposes a comprehensive risk assessment method based on game theory and grey relational projection. Firstly, by analyzing the risk factors faced by modern power grids, the risk assessment index system is reconstructed from three aspects, grid structure, operational status and energy supply. Secondly, by creating combination weighting model based on game theory, the subjective weight values and the objective weight values of indexes are integrated to eliminate the weight deviation caused by single weighting method. Thirdly, based on grey relation projection model, the projection values of risk index samples on ideal states are calculated, and the overall risk of samples is represented by its superiority to negative ideal state. The proposed method could identify operation modes with high risk for power grid, which is significant to safe and stable operation of the power grid. Finally, by case analysis, the effectiveness of the proposed method is proved.