bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on Optimal Operation for Concentrating Solar Power Plants Considering Wind Power Reduction
Authors: Yuan Guochun , Guo Panfeng 
Published: August 2020

Abstract
Concentrating solar power (CSP) generation units, which can generate electricity without any pollutant emissions, is one of the most attractive alternatives to fossil fuels. However, the main disadvantage of the CSP device is the high investment cost. In order to improve the economic feasibility, it is necessary to properly design the thermal energy storage (TES) device to optimize its economic benefits. In this paper, considering the operation requirements of power system, the optimal co-allocation model of solar energy field and TES device is established to weigh the investment cost and wind power reduction. Through a case study, the effectiveness of using energy storage to improve wind power consumption is verified on the basis of considering the constraints of the actual operation of the system, solar radiation and wind energy uncertainty.
Design of Fast Fault Diagnosis System for Transformer Equipment based on CBR and RBR
Authors: Hui NI , Xiaolu XU , Gong Hao , Luo Chuanxian , Zhou Zhengqin 
Published: August 2020

Abstract
After studying the common defects and faults of transformers, we design and propose a fast fault diagnosis system for transformer equipment based on CBR(Case-Based Reasoning) and RBR(Rule-Based Reasoning). In the system, test cases are firstly matched with the cases. If there are similar cases, CBR is used to obtain the diagnosis conclusion. If there are no similar cases, the rule reasoning module based on FTA (Fault Tree Analysis) is launched. This module subdivides transformer fault modes into winding, core, bushing, on-load tap changer, cooling system, non-electric protection and other fault modes, and forms rules. Based on this situation, a transformer equipment fault tree is established to serve the rapid diagnosis system. The structural characteristics and fault modes of transformer windings, iron cores, bushings, on-load tap changers, cooling systems, non-electrical protection and other equipment are subdivided. And then, a fast fault diagnosis model and system for transformer equipment are established. Finally, the case study proved that the system can diagnose and analyse the equipment faults based on the comprehensive multi-source data of transformers, and the diagnosis conclusion is reliable and practical, which has provided support for realizing the state maintenance of transformers.
Lightweight design and optimization of three-speed electric drive axle
Authors: Jin Di , Wang Zongze , Wang Jianhua 
Published: August 2020

Abstract
In order to provide wider speed range and smaller volume, wet multi-plate clutches and planetary gears are utilized to design a three-speed transmission system, electric drive axle housing is designed according to the transmission system. Aluminum alloy is used to perform lightweight design. Firstly, the finite element (FE) models of electric drive axle housing are built. Secondly the stiffness and strength simulation results of electric drive axle housing under different conditions are obtained. According to the simulation results, the thickness of electric drive axle housing is reduced and the stiffeners are added. The FE results show that the quality of the optimized shell is greatly reduced on the basis of the original stiffness and durability.
Study on Real-time Lithology Identification Method of Logging-while-drilling
Authors: Gang Chen 
Published: August 2020

Abstract
In geophysical exploration and development, lithology identification is the basis for understanding the strata and solving the reservoir parameters. Through the comparative study of three popular lithology identification methods including SVM, GRNN and Elman, each method in the experiments takes the same logging data as a sample to predict and identify, and the most suitable identification method is selected and applied to the automatic identification of lithologic interpretation. It is found that the prediction accuracy of SVM is highest in automatic lithology identification, and the method is suitable for computer automatic analysis in terrestrial interpretation system.
Analysis and Evaluation of the DC Magnetic Bias for 1000kV Ultra-High Voltage Transformer Caused by Changsha Rail Transit
Authors: Yuan Pei , Liu Yun , Li Xin , Xu Puming , Yan Ying , Hu Jinhao 
Published: August 2020

Abstract
In this paper, the stray current distribution network model of Changsha rail transit system is constructed from the perspective of the stray current induced by rail transit in the adjacent substation. We evaluated the degree of influence of the stray current of urban rail transit lines after the completion of the Changsha 1000 kV UHV substation, which provided a reference for the UHV transformer DC bias prevention experience.
Grid-connected Inverter Control Strategy Based On Capacitor Reference Voltage Feedforward
Authors: Xing Ning , Huang Hongquan , Chen Yanming 
Published: August 2020

Abstract
In view of the disadvantage that grid-connected power is not high and the phase margin of the grid-connected current is greatly reduced with the increase of impedance of many grid voltage feedforward control strategies. A grid-connected inverter control strategy based on capacitor reference voltage feedforward is proposed. In this control, the error between the filter capacitor voltage and its reference voltage is combined with the proportional controller as the inner loop control, the error between the inverter side current and its reference current is combined with the current controller as the outer loop control to improve the robustness of the system. The phase difference between grid-connected current and grid voltage is reduced by using capacitor reference voltage feedforward. In addition, by using the grid voltage resonance feedforward, the system can not only retains the ability to suppress harmonics, but also prevents the system’s phase margin from decreasing greatly under weak power grid. The proposed strategy has good dynamic performance, it can obtain good grid-connected current quality and high grid-connected power, and it has strong robustness to the change of LCL parameters and the fluctuation of grid voltag. At the same time, it has better adaptability to weak power grid.
Application of the technology about frequency conversion resonance in cable test
Authors: Jie Tang , Mei Cuizhi , Ming Guojin 
Published: August 2020

Abstract
According to the introduction about technology of the frequency conversion and structure of the device, In this paper, we know that the application of new reactor plays an important role in the test of XLPE cable and other equipment with operating voltage of 110kV and has high efficiency, we also elaborate characteristics of the test device about frequency conversion resonance combined with practical application.
Online detection method for inter-turn short-circuit fault of permanent magnet synchronous motor based on deep learning
Authors: Shi Chengji , Lu Xiaojuan 
Published: August 2020

Abstract
Aiming at the difficult problem of inter-turn short-circuit fault diagnosis of permanent magnet synchronous motors without stopping the machine, this paper takes timing anomaly detection as the starting point, and proposes an online fault detection method based on transfer learning deep self-coding network. First, a migration deep self-coding network model is constructed, and a combined sample of negative sequence current and electromagnetic torque is used to extract common features in different domains. Then, the online detection model of abnormal timing is established. Finally, the permutation entropy value of the normal state of the motor is used to construct an alarm threshold to improve the matching speed of abnormal sequences in the online data. Experimental results show that the method in this paperhas better detection practicality.
Design of an Input-Series Flyback Power Supply for Ultra-Wide Input Voltage Range Applications
Authors: Lin Yin , Liu Yahui , Guo Jiangtao , Ren Gaojian 
Published: August 2020

Abstract
In view of the inconvenient power taking, bulky volume, poor anti-fluctuation capability, high cost and complicated control of ultra-wide input-voltage mine-used power supply, a low cost design scheme of ultra-wide input-voltage power supply based on input-series flyback is proposed. The switching power supply scheme adopts conventional MOSFET to realize the self-adaptability under ultra-wide input-voltage range. In this paper, the circuit structure and working principle of mine-used power supply and the design of multi-channel synchronous pulse drive circuit are introduced in detail, and the feasibility of the circuit design is verified by experimental prototype. The experimental results show that the power supply scheme is not only simple in circuit design and low in cost, but also has the advantages of strong input-voltage adaptability, high conversion efficiency, good voltage sharing effect and the like, which is suitable for mining electrical equipment with multiple input-voltage levels.
Study on the Factors influencing the qualified Rate of Large Disturbances of the Primary Frequency Regulation on Heat Supply Units and the Improving Measures
Authors: Yu Qingbin , Sun Mengmeng , Li Yuanyuan 
Published: August 2020

Abstract
At present, the major problem faced by heat supply thermal power units is not only to ensure the external heating demand, but also to meet the requirements of the power grid for the primary frequency modulation of units. The main types of heat supply units in Shandong power grid are introduced. And take a 600MW pure condensing heat supply unit as an example, the reasons that affect the test results of large disturbance of primary frequency regulation in the period of heat supply are analysed. The scheme of optimization and transformation is put forward, which has good effect and meets the requirement of primary frequency regulation of power grid.
A Novel Oil-Water Two-Phase Flow Numerical Simulation Method In Tight Sandstone Reservoirs
Authors: Lei Zhanxiang , Zeng Baoquan , Wang Bin , Huang Fei , Xu Hui , Zhang Muzhen , Wu Shucheng , Qu Tailai 
Published: August 2020

AbstractAs a crucial factor affecting water flooding in tight sandstone reservoirs, dynamic capillary pressure (DCP) has significant impact on the production performance during oil-water flow. In this work, a novel numerical simulation method with DCP is developed to study oil displacement in tight sandstone reservoirs. Based on this new model, the impacts from DCP to water/oil displacement (or water flooding effects) are analysed. The results of this work show that the effects brought by dynamic capillary pressure cannot be neglected. The more significant dynamic effects of capillary pressure correspond to the sample with lower permeability. The effect of DCP is probably a major contributor to non-linear flow (non-Darcy flow) in tight sandstone reservoirs during water flooding process. Compared with the conventional flow theory (e.g., static capillary pressure theory), our derived model with DCP can help to reduce the uncertainty in water/oil flow in tight sandstone reservoirs.
Optimization Design Research of Deformation Control in Qingyuan Xinhe Garden Foundation Pit
Authors: Qiang Zhang 
Published: August 2020

Abstract
As there are many factors affecting foundation pit excavation and enclosure structure design, it is strongly necessary to carry out dynamic design and information-based construction, and to perform anti-analysis through monitoring information in deep foundation pit engineering. Taking Qingyuan Xinhe Garden foundation pit project as the engineering background and based on the deformation control optimization design theory, this paper analyzed the deformation of the foundation pit and the settlement volume of the surrounding buildings by combining on-site monitoring measurement and numerical simulation, which can provide an important reference for the safety and stability of foundation pit.
Research on Stress Monitoring Index of Hydraulic Tunnel Lining Based on Numerical Simulation
Authors: Zhu Junwen , Wang Zhaosheng , Li Dandan 
Published: August 2020

Abstract
In order to study the lining stress index of hydraulic tunnel, this paper mainly analyzes the safety monitoring data of a hydraulic tunnel, uses ANSYS finite element software for modeling, uses Flac 3D software for numerical calculation, and uses numerical analysis method to develop hydraulic tunnel G1 -18 Stress monitoring indicators for lining of section. The results show that the actual measured value is basically within the control range of the data calculation value. When determining the monitoring index of the steel bar stress, the result of the numerical calculation can be used as the index, but the monitoring index of the top steel bar meter should use the maximum monitoring value as the index.
Research on Incremental Distribution Network Operation Model Based on Cost-Benefit Perspective
Authors: An Lei , Tan Caixia , Wang Mianbin , Liu Xuan , Tan Zhongfu 
Published: August 2020

Abstract
In order to select the optimal mode of incremental distribution network and increase the revenue of the incremental distribution network, incremental distribution network cost-benefit model in three scenarios were established: non-sales company investment + operation, electricity sales company investment + operation, non-sales company investment + electricity sales company operation. At the same time, the three operating models are evaluated using three indicators: net present value, dynamic investment payback period, and net present value rate. Finally, take an incremental distribution network as an example to verify the effectiveness of the model. The result of the calculation example is that the electricity sales company’s investment + operation model has higher economic benefits than other models, the investment payback period is shorter, and the unit investment income is higher.
Research for Process on Investment Casting of Mouse Head Based on 3D Printing
Authors: Zhang Yue , Li Xue-Ying , Ma Chang-Liang , Xiao You 
Published: August 2020

Abstract
The rat head is selected as the object for the application of PLA 3D printed model in investment casting of alloyZL104. In order to optimize the process of casting, CAE analysis software AnyCasting is performed for the design of gating system. The top gating system shows the excellent casting results with little shrinkage defects. The solutions from simulation are conformed in the reality experience, which demonstrates that AnyCasting can provide accurate predictions of casting results, as well as reliability reference for the design of the process. Meanwhile, using the 3D printed rat head model for investment casting is practicable.
Performance Simulation of Plate Heat Exchanger Based on ANSYS ICEM
Authors: Yan-fei Li , Yan-wu Wang , Chao Du 
Published: August 2020

Abstract
A three-dimensional geometric model was established by ANSYS ICEM according to the structure of a plate heat exchanger. And the thermodynamic performance under different working conditions is simulated. The pressure field, temperature field, velocity field and flow pattern were analyzed based the simulated results. The heat transfer performance and resistance performance of heat exchanger under different flow rates and inlet temperature difference of cold and hot fluids are compared and analyzed. The results provide support for the more efficient use of plate heat exchangers under different working conditions.
Development and Application of the special drilling rig for oblique guide hole
Authors: Shu-jie Liu , Zhi-qiang Liu , Ji-wei Zhang 
Published: August 2020

Abstract
For the construction conditions of long-distance inclined drilling in roadway or chamber, a new type of self-moving hydraulic top-drive drilling rig is developed independently. Follow the research steps of the overall design, the key-parts design, the hydraulic system design, the industrial test. The main functional organization of the oblique-guide-hole drilling machine includes the power head, the feeding device, the power source, the drill pipe delivery installation, the rig control system, the hydraulic transmission system. The special oblique-guide-hole drilling rig realizes the construction requirement of any inclined drilling of 0∼90°, at the same time, it can meet the technical requirements of the directional drilling assembly, that is the combination of down-hole motor, non-magnetic drill collar and Wireless while drilling. The track of long-distance oblique drilling is precisely controlled. The field test of the special oblique-guide-hole drilling rig is at Changlongshan Pumped Storage Power Station in Zhejiang, China. The actual guide hole has an inclined length of 289.5m, and the deviation slope of the borehole is controlled within 2.86‰. It is successfully completed the anti-shaft guide hole in the lower section of the 1# diversion system high-pressure pipeline safely, quickly, and efficiently.
Kinetic Analysis and Optimum Design of Extracting Pectin from Pineapple Peel by Ion Exchange
Authors: Yanbo Gu , Bing Jiang 
Published: August 2020

Abstract
The pectin in pineapple peel was extracted by ion exchange method. The optimum conditions of pectin extraction were obtained by single factor and orthogonal test. Under the optimal process conditions, the kinetic model was constructed by Fick’s second law, and the rate constant and apparent activation energy were obtained. The validity analysis and the model prediction ability were verified. The results show that the kinetic model can predict the kinetic process of pectin extraction from pineapple peel by ion exchange method. According to the kinetic model, the optimal conditions were obtained: the dosage of ion exchange resin was 5%, pH was 2.5, the ratio of material to liquid was 1:30 (g: mL), the extraction temperature was 85°C, the extraction time was 141.7min, and the pectin yield was 9.74%, which was consistent with the results of single factor and orthogonal test.
Mass transfer simulation of main species in swine biogas slurry in bipolar membrane electrodialysis
Authors: Zhao Minqi , Chen Junjie , Zhu Hongguang 
Published: August 2020

Abstract
The aim of this model is to study the mass transfer of main species in swine biogas slurry in bipolar membrane electrodialysis. We developed a two-dimensional steady-state model composing three compartments. In this model, Nernst-Planck equation and Hagen-Poiseuille equation are combined for mass transfer and Faraday’s law is for the electrolyte current density. The model considers local electroneutrality condition and does allow cations and anions pass through membranes. The set of equations with boundary conditions and initial values are calculated by the finite element numerical method with COMSOL Multiphysics. This model can be able to predict the distribution of electrolyte potential, the ion flux and the ion concentration distribution. The two parameters, cell voltage and inlet velocity, are indicated to have influences on the process of bipolar membrane electrodialysis treatment on swine biogas slurry.
Gait planning and research of hexapod bionic robot based on bipedal injury
Authors: Xu Fenghui , Jia Yongxing , Zhou Zequan , Liu Xiaoqi , Wang Lei 
Published: August 2020

Abstract
Hexapod bionic robot plays an important role in battlefield reconnaissance and battlefield rescue. However, due to the complex battlefield situation, the robot’s legs are often damaged due to attacks, electromagnetic interference and other reasons, so it cannot work normally according to the original gait planning. In this paper, the damage situation of the hexapod bionic robot gait planning study, establish a foot injury cases six-legged robot model, USES the existing six-legged robot, combined with Matlab simulation model, build six-legged robot for foot injury under the condition of six-legged robot, simulation analysis is carried out under the different gait, planning out the suitable gait of robot movement. According to the analysis, the suitable gait under the condition of different injuries was obtained. This study can be used to improve the adaptability of hexapod robot in battlefield conditions and extend the working life of hexapod robot.
Study on the treatment of caprolactam wastewater by electrocatalytic oxidation process
Authors: Wang Tingfeng 
Published: August 2020

Abstract
Aiming at the caprolactam wastewater discharged from a chemical enterprise, the electrocatalytic oxidation technology was used for advanced treatment. When the current is 450A and the inflow flow is 3m3/h, the COD value of the effluent is reduced from 100mg/L to below 50mg/L, the ammonia nitrogen is reduced from 10mg/L to below 4mg/L, and the chroma is reduced from 50 times to below 30 times. The effluent quality meets the class A standard in Table 3 of 《Discharge standard of pollutants for municipal wastewater treatment plant》 (GB 18918-2002).
Intelligent design of street lamp based on Arduino
Authors: Liu Yuanchao , Zheng Kuncan , Liu Yuanhao , Wu Tao , Zhao Xudong 
Published: August 2020

Abstract
In order to promote the process of social modernization, the traditional street lamps are also moving towards intelligent development. However, the existing street lamps mostly use a single LED lamp or high-pressure sodium lamp, which can’t cope with the complex road conditions in China. The designer proposes to install the monitoring system on the street lamp, design the fine artificial intelligence light distribution and color temperature regulation scheme, add the functions of positioning, alarm, repair, pollutant and rain and snow monitoring, and realize the data interaction between the street lamp and the user and the manual intervention of the user when necessary through the infrared Bluetooth Internet of things and other technologies. The design is developed, simulated, debugged and tested on Arduino hardware and software platform. The results show that the design is reasonable and feasible.
Research and Application of Nelson Concentrator in Beneficiation Test of Quartz Vein Type Gold Ore
Authors: Zhang Wenping , Cai Mingming , Li Guangsheng , Huang Fabo , Zhu Xingfu , Xu Chao , Zhao Jianjun 
Published: August 2020

Abstract
A gold deposit in Shandong belongs to Quartz vein type gold-bearing deposit, the main gold minerals are natural gold and silver-gold minerals, there are a few metallic minerals such as pyrite, the main gangue minerals are quartz, feldspar, sericite and so on, the average size of gold minerals is 62.37 microns, the particle size of the cloth is coarse. As a kind of gravity separation equipment, Nelson concentrator is more and more favored by mines because of its high enrichment ratio, high recovery rate and extremely friendly to environment, the experimental research of Nelson concentrator was carried out, and the gold concentrate with gold grade of 385.06 G / T and recovery of 62.21% was obtained.
Effects of different puffing measures on the fruit quality of ‘summer black’ grapes
Authors: Peng Ting , Liu Chao , Wu San-Lin , Li Jing Bai , Liu Fang 
Published: August 2020

Abstract
In this experiment, the effect of GA3 + CPPU on the quality of ‘summer black’ grape was studied. The results showed that the combination of GA3 and CPPU (1-2d: 40ppm GA3 + 2ppm CPPU, 12-14d: 50ppm GA3 + 6ppm CPPU) was better than the combination of GA3 and CPPU (12-14d: 50ppm GA3 + 6ppm CPPU), which could increase the weight of ear and single fruit, increase the vertical and horizontal diameter of fruit grain and fruit shape index, and had better coloring, but decreased the fruit shape index Solid acid ratio.