bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of Monitoring in settlement For Vacuum Combined Stack Preloading about Soft foundation Sluice
Authors: Yong-Xin Yao , Fanng-Yi Ji 
Published: March 2020

Abstract
Vacuum combined surcharge preloading is a kind of drainage consolidation method, having many advantages, such as low reinforcement cost, short construction period and good reinforcement effect, and suitable used in foundation treatment in soft foundation. Based on vacuum combined surcharge preloading reinforcement project of one Sluice soft soil foundation in the east coast of Zhejiang Province, this paper introduced the in situ monitoring situation in the vacuum preloading process, mainly summarized the monitoring result of vacuum degree and surface subsidence, and found out the changes and connections of indicators in the preloading process. At the same time, the development process of vacuum combined with preloading and settlement is simulated by finite element method.
Formulating an Innovative Spatial-Autocorrelation-based Method for Identifying Road Accident Hot Zones
Authors: Feng Yiwei , Zhu Wenjun 
Published: March 2020

Abstract
The traditional method of identifying road accident hot zones is through the examination of accident frequency and nature, which sometimes, can be subjective and inaccurate. To overcome the limitation of the traditional method, researchers have applied Geographic Information System (GIS) approaches to identify and visualise road traffic accidences in real-time. However, these approaches still treat accidences as occasional and discrete events and can not support accurate analysis and prediction of accidences at some point. This paper takes the spatial autocorrelation nature of accidents (i.e. the interdependence of accident data and the relationship between the accident and space) into account and proposes an innovative spatial-autocorrelation-based method to identify freeway accident hot zones. Based on the spatial autocorrelation and mathematical statistics, this method constructs a point-line connectivity network to realise the space localisation and validation of accidents. Combined with GIS approaches, our approach can also automatically identify and visualise accident-prone areas. At the moment, the approach has been tentatively applied in a highway in China. The result demonstrates an algorithm behind the approach, which can effectively convert accident data into spatial data, cluster accident hot zones of any length and predict the whereabouts of likely accidents in the future. In conclusion, the robustness and accuracy of the approach innovates this study.
Analysis of Groundwater Flow Velocity and Direction along the Zihe River in the Dawu water Source
Authors: Zhan Hao , Zhu Henghua , Wei Zhengrun , Yang Lizhi , Liu Benhua , Mao Weijian , Lu Xuchun 
Published: March 2020

Abstract
In the observation wells installed along the Zihe River in the Dawu water source, the AquaVISION Colloidal Borescope produced by Geotech Company of the United States was used to measure the groundwater flow velocity along the Zihe River. We analyzed the measurement results based on the drilling information. The results showed that, (1)The groundwater flow velocity along the Zihe River in the Dawu water source area was between 56.798 and 122.599 m/d, and the average flow velocity was 95.380 m/d. The groundwater flow velocity of observation wells along the Zihe River was generally faster. The flow velocity of the SW447 well in the upstream of the Zihe River was the largest, and the average flow velocity was 122.599 m/d. The overall groundwater flow along the Weihe River flowed from south to north.(2)The control factors of groundwater flow velocity were mainly: large amount of water pumping, local geological structure, related hydrogeological conditions, etc.
Optimization of Fracturing Construction Parameters of Coal bed Methane Wells
Authors: Li Shuguang , Bian Liheng , Huang Ming , Yu Lizhu 
Published: March 2020

Abstract
The article analyzes the gas production and construction parameters of the vertical wells in the representative layer of the 15# and 3# layers in the target area due to insufficient construction strength and low gas production in the test well. The influence of the fracturing construction of the test well on its productivity was studied. The fracturing effect prediction model was established by combining the influencing factors such as construction strength, fracturing fluid, sanding strength and sand ratio. The model is used to carry out optimization research on fracturing construction parameters. Based on the analysis of influencing factors, the optimization parameters of construction parameters are proposed. The optimization scheme can obtain better test results through later engineering verification. The results show that the stable gas production of the coalbed methane well in the target block can reach an average of more than 1000m3/d through the optimization of the fracturing construction parameter system.
Research on Air-Conditioning Control Strategy of Textile Mill Based on Bidirectional Fuzzy Dynamic Decoupling Compensation
Authors: Wang Yannian , Du Kai , Wu Yunhui , Tang Hengkun 
Published: March 2020

Abstract
This paper introduces the main problems in the air conditioning system of China’s textile mills. Due to the coupled line problem of temperature and humidity affecting each other in the temperature and humidity regulation system, it is difficult to adjust the air conditioning system in the textile mill, and it is also more difficult to adjust the air conditioning system in the textile mill because of the influence of region, season, human activities and so on. In view of this situation, the air conditioning control system of textile mill based on TMS320F28335 was designed by dynamic decoupling control method. The reasonable adjustment and control of the equipment of the air conditioning system can achieve the stable control of the temperature and humidity of the workshop of the textile mill and reduce the energy consumption of the air conditioning control system. The practice shows that the system has good dynamic performance, high control precision and remarkable energy saving effect, and has a broad application prospect in air conditioning control in textile enterprises.
Experimental Research on Temperature Rise of Mining Explosion-proof Turbine Generator
Authors: Jun Gao , Jiguan Zhang , Zhiqin Bi , Jie Lian 
Published: March 2020

Abstract
In order to prevent the temperatureof a mining explosion-proof turbine generator from exceeding the safety threshold due to faults during operation, this paper monitors the temperature in real time during the operation of the turbine generator under extreme conditions by installing a temperature sensor inside the generator. This paper aims to reveal the mechanism and verify the reliability of temperature rise of the turbine generator.
Regional Differences and Spatial Pattern Evolution of Mineral Resources Industry in China
Authors: Jiang Rui , Liu Chunxue , Liu Xiaowei , Li Leilei 
Published: March 2020

Abstract
The mineral resources industry is the basic industry of national economy in the world. The distribution of mineral resources industry is often not matched with the areas with rich mineral resources. This paper analyzes the distribution characteristics of industrial added value of mineral resources in the mining and dressing industry, smelting and processing industry in China. Energy and metal mineral resource industries are focused on. The results show that the distribution of each link of the mineral resources industry does not match the resource enrichment area. The scope of the mining and dressing industry has expanded, mainly in the north of China, and the smelting and processing industry continues to gather in the coastal provinces. Energy mining and dressing industry is mainly located in the north of China, and the processing industry is mainly distributed in the middle and east of China. The metal mineral resources industry mainly depends on resource endowment. Metal products industry is different, mainly distributed in the coastal provinces with relatively developed processing technology.
Prediction of twisting Machine Speed based on improved Particle Swarm Optimization algorithm
Authors: Wang Yannian , Zhai Weixun , Li Xiongfei , Zhong Zheng 
Published: March 2020

Abstract
In order to predict the conversion of process parameters to roller and spindle speed in the production of twisting machine in textile mill, the improved particle swarm optimization algorithm is used to optimize the prediction model based on BP neural network, the optimization algorithm is used to find the optimal solution of neural network weight and bias, and the BP neural network algorithm is used to predict the speed value of roller and spindle. The improved single neural network is easy to fall into the problem of local minimum and slow convergence speed. The experimental data show that the prediction data on BP neural network based on improved particle swarm optimization algorithm are accurate and the error is small. It can be seen that the prediction model can meet the needs of speed prediction in twisting machine production.
Indonesia’s New Petroleum Fiscal Regime: Fiscal Changes, Impacts and Future Trends
Authors: Yun Peng , Jia Li , Jie Xin Yi , Du Fen Sun , Yu Wen Chang , Hong Wei Li , Zhaozhe  , Feng Gao 
Published: March 2020

Abstract
Indonesia has its special influence on the world petroleum industry not only due to its relatively abundant resources but also to its historical influence on world petroleum fiscal regimes. The newly enacted EMER regulation on Gross Split PSC in 2017 was the biggest structural change of Indonesia’s petroleum fiscal regime in a decade and will have profound influence on Indonesia’s Petroleum Industry. This research compares the detailed fiscal terms between Indonesia’s standard PSC and Gross Split PSC and further analyse the possible negative impacts based on model economic evaluation analysis as well as qualitative analysis. In conclusion, the Gross split PSC has negative impacts on contractor economics and may deter new investments in oil and gas exploration and development. Although the gross split PSC brings the simpler administration and better structure of fiscal progressivity. The change to Gross Split PSC reflects Indonesia’s long fiscal policy trend of increasing government take and strengthening government control. However, Indonesia’s government will also bring more incentives to offset the negative impacts of fiscal regime change and thrive to balance between improving government benefits and attracting foreign investments to revitalize oil and gas exploration and development.
Research and Application of Fracturing Fluid Preparation with Produced water in Erlian Oilfield
Authors: Zhang Bin , Wang Meisi , Li Ning , Zhang Dejun , Wang Peng , Weng Guopeng , Zhang Yifei , Long Changjun , Zeng Zhiguo , Ning Mengmeng 
Published: March 2020

Abstract
Aiming at the problem of shortage of clean water resources and mixing fracturing fluid in winter in Erlian oilfield, the technology of producing water to prepare fracturing fluid was studied. Horizontal comparison of water samples from four combined oil and gas treatment stations shows that oil, surfactant and bacteria are the main factors that affect the indigestion of hydroxypropyl guar gum in oilfield produced water. Through the indoor research developed a new type of multi-functional cosolvent and explored the oilfield produced water confecting fracturing fluid formulation system: 0.3-0.5% hydroxypropyl guar gum +X% multifunctional cosolvent + 0.2% flow-back agent + 0.4-0.6% crosslinking agent. This technology simplifies the mixing process and reduces the amount of additives. The liquid still has a high viscosity after being placed for more than 3 to 4 days in summer. In winter, using the produced water for mixing can reduce the influence of environmental temperature and ensure the smooth construction. After field application in well h5-19, the effect is outstanding, which provides important technical support for follow-up fracturing construction in Erlian oilfield.
Simulation Design and Numerical Analysis of Bearing Capacity of Water Lubricated Thrust Bearing
Authors: Zhang Haonan , Zheng Weigang , Li Fuxin 
Published: March 2020

Abstract
Thrust bearing is widely used in all kinds of rotating machines, and the lubrication capacity and bearing capacity of sliding bearing have very important evaluation parameters for the performance indexes of safety, economy and stability of the machine. With the proposal of national industrialization strategy, the development direction of all kinds of machines to high-speed and large-scale is becoming more and more clear. Therefore, the analysis of bearing capacity and lubrication performance of sliding bearing is becoming more and more important. The main goal of this paper is to carry out simulation design and optimization of bearing capacity of thrust bearing, and carry out numerical analysis of bearing capacity after optimization design. In the aspect of research methods, this paper applies the Reynolds equation and its boundary conditions to the analysis of machine bearing capacity, and discretizes the equation to a certain extent, so as to ensure that the factors that change the performance of water lubricated thrust bearing with the change of applicable conditions are taken into account. The hydrodynamic lubrication value of the water lubricated thrust bearing obtained by the experiment in this paper is consistent with the temperature field value of the finite solution, which shows that the measurement results of the water film thickness, pressure distribution and the temperature of the thrust pad in the experiment are in good agreement with the theoretical calculation results.
Parameters Optimization of a Direct Secondary Oblique Shock Wave Nozzle
Authors: Li Li , Wang Yanqi , Bi Yundong , Hu Chunyan 
Published: March 2020

Abstract
The structural optimization design of the secondary shock wave channel in a convergent-divergent nozzle is carried out with the latin hypercube design method and response surface methodology. The multi-island genetic algorithm is used to find the optimal solution with four designed parameters including the wedge wall angle of secondary flow chamber δ1, the inclined wall deflection angle of secondary flow chamber γ, the width of front vacuum chamber w1 and the distance from the secondary flow chamber to nozzle outlet e. The numerical results indicate that the direct secondary shock wave channel can increase the efficiency of the secondary flow and improve the nozzle performance. The influence on the thrust pitching angle δp is w1, e, γ, and δ1 following in order of decreasing influence.
Design of magnetic flux detection test system for moving target
Authors: Huang Kui , Xu Chaoqun , Liu Chaobo , Dai Jialong , Zhang Shaohua , Yi Zhong , Meng Lifei , Xiao Qi 
Published: March 2020

Abstract
Magnetic detection based on the principle of magnetic flux induction is an important method for moving target detection and tracking. This paper designs and develops a test system based on a magnetic flux detection method in a laboratory environment. The article first introduces the overall design scheme and various components of the test system. Based on the target’s magnetic and motion characteristics, a motion simulation test platform is designed and developed. Based on the theoretical derivation and numerical simulation of the magnetic target, a sensor is designed and manufactured. The signal acquisition and analysis equipment acquires and analyzes the induced signals. According to different test purposes, the corresponding test methods are designed and various tests are carried out. The results show that the system design can meet the test requirements of the magnetic flux detection system, which is helpful for further research and optimization of the detection method.
Experimental and numerical study on the efficiency of hydraulic collection utilizing two different suction inlets
Authors: Cheng Hui , Chen Yuxiang , Xiong Hong 
Published: March 2020

Abstract
Hydraulic collection has been shown to be a promising technology in deep sea mining. However, the efficiency of hydraulic collection is affected by many factors. For understanding the effect of inlets distinct from shapes on collecting efficiency, a series of upward pumping experiments was conducted on spheres. Flow fields at different inlets were described by numerical simulation and compared to uncover the influence of inlet shape on collecting the sphere. The experimental results indicate that straight cylindrical pipe with flanged inlet has a higher efficiency in collecting than the straight cylindrical pipe without flanged inlet. The numerical results show that the restriction of the flanged inlet lead to a larger area of negative pressure on the top of the sphere, which means a bigger upward force.
Study on the calibration method for tri-axis fluxgate gradiometer
Authors: Xu Chaoqun , Huang Kui , Zhang Shaohua , Meng Lifei 
Published: March 2020

Abstract
Aiming at the measurement errors caused by non-orthogonality, inconsistent sensitivity, zero-offset of the tri-axis fluxgate sensor and the position misalignment of two fluxgate sensors composed of the gradiometer, this paper establishes the correction model of measurement error of magnetometer and gradiometer, puts forward the comprehensive coefficient method, and uses the non-magnetic turntable to calibrate the Mag648 three-axis magnetometer and gradiometer in the uniform magnetic environment. The experimental results show that the method can reduce the maximum total magnetic field deviation of the two magnetometers from 552.4 nT to 15.0 nT, and reduce the maximum output deviation of the three-component gradiometer from 3891.5 nT to 37.2 nT, which effectively improves the reliability of the three-axis magnetic sensor in measurement.
Study on Technical Limits of Well Pattern Adjustment for the third type oillayer in middle part of Lamadian oilfield
Authors: Xu Chunsong 
Published: March 2020

Abstract
After the Lamadian oilfield enters the development period of ultra-high water cut, the third type oil layer will be in the stage of water flooding development in the medium and long term in the future. By recombining oillayers and rebuilding the well network, it is possible to better control the difference of oil layers, slowing plane, inter-layer and intra-layer contradictions, improving the development effect of multi oillayers sandstone reservoir in extra-high water cut period. This paper uses the subdivision of water-driven oillayers, recombining oillayers, many datas of field test, comprehensive analysising and studying the third type oil layer (Gao I6 and below), providing technical support for the adjustment of the well pattern network of the third type of oillayer development in the future, and forming an operational development model for the subdivision of water-driven oillayers, the reconstruction of well pattern in the development stage in ultra-high water cut.
Research on Application of BJZM-MWD1 Measurement While Drilling System
Authors: Yang Ming 
Published: March 2020

Abstract
Measurement While Drilling system has been more and more widely used in directional drilling construction on the surface of mines. The system provides guidance for drilling construction, because it can transmit drilling parameter signals such as the deviation angle, azimuth and tool face angle collected by downhole tools to the ground through the mud, and then the signals are analyzed and decoded by computer software to restore the actual parameter data. In drilling construction, the self-developed BJZM-MWD1 Measurement While Drilling system encountered problems such as great variation in the amplitude and width of mud pulse signals and the interference of pulse signals. By filtering and amplifying the mud pressure generated by the pulse signal, and improving software decoding algorithm, the stability and reliability of the system have been greatly improved, meeting the requirements in site construction.
Research and Application of Real-time Ship Traffic Intelligent Analysis and Calculation Platform under 5G Background
Authors: Jing Mei , Zheng Weigang 
Published: March 2020

Abstract
In the current navigation process, ships often encounter ship collision risk due to the lack of real-time channel information. In order to effectively avoid the collision risk of the ship, relevant researchers conduct research and development through VHF communication technology, satellite communication and GPS navigation and other mature technologies, aiming to build a complete marine ship navigation system. Although the application of this technology improves the disadvantageous situation of ship navigation to a certain extent, while it cannot accurately predict the route risk and real-time information about the ship.
With the commercial promotion of 5G network technology, by integrating 5G network technology into the process of ship navigation. On this basis, a special 5G communication ship traffic intelligent analysis platform is built, which can fundamentally strengthen the intelligence of ship navigation information collection and information collection. Through the content and construction of the 5G network, the information within the industry and between socially relevant departments can be exchanged and closely connected to avoid the generation of isolated information islands; and the scientific construction of information management can be achieved to effectively avert the risks of maritime navigation and practical to make sure the safety of ships sailing in dangerous waters has been strengthened.
Research on improved harmonic detection method based on instantaneous reactive power theory
Authors: Chen Lei , Ji Tiancheng , Qi Yingchuan , Zhao Hongtao , Ma Yanyan 
Published: March 2020

Abstract
In this paper, the problem of the low pass filter is difficult to achieve the response speed and the accuracy balance of the test based on the ip – iq
traditional harmonic current detection algorithm based on the instantaneous reactive power theory, and the method of improving the method of the low pass filter based on Sa-function characteristics is proposed. Then, according to the model, the filter is optimized by combining the ratio integral. Finally, the simulation is carried out. The simulation results show that the low pass filter based on the Sa-function characteristics can improve the real-time and accuracy of the harmonic detection.
A Brief Analysis of Land Subsidence Control Effect in Beijing-Tianjin-Hebei Region
Authors: Zhu Juyan , Guo Haipeng , Zang Xisheng , Wang Yunlong , Fan Gaodong 
Published: March 2020

Abstract
This article describes the history and the hazard of land subsidence in Beijing-Tianjin-Hebei region, analyses the main inducement of land subsidence. And then, the change of land subsidence rate from 2015 to 2016 has been analysed. According to the analytic results, the land subsidence control effect in these two years in Beijing-Tianjin-Hebeiregion has been evaluated and the reasons of land subsidence changed has been analysed. At last, it points out the key measures in land subsidence control.