bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparison of Physiological and Biochemical Characteristics of Grafting ‘Lingfengnuo’ and ‘Guan litchi’
Authors: Shi Meng-Jiao , Wu San-Lin , Li Jing-Bai , Yin Juan , Liu Fang 
Published: August 2020

Abstract
In this experiment, the optimal grafting combination was obtained by comparing the physiological and biochemical characteristics of the rootstock ‘Dahongpao’ with scion ‘Lingfengnuo’ and ‘Guan litchi’. The results showed that the soluble protein content and the enzyme activity of POD in the rootstock-scion combination of ‘Dahongpao’ and ‘Lingfengnuo’ were higher than those of ‘Dahongpao’ and ‘Guan litchi’, with higher affinity and better adaptability to the environmental and climatic conditions in Leshan area.
Releasing control of nitrogen and phosphorus from contaminated sediment covered with aluminum-zirconium modified zeolite
Authors: Shunli Ning , Siyuan Hong , Shilong Shen , Hui Qiu , Chun-lei Zhang 
Published: August 2020

Abstract
In this paper, aluminum and zirconium based metal compounds were used to modify natural zeolite to produce Al-Zr modified zeolite (AZMZ). The adsorption performance, micro morphology and releasing control effect of AZMZ on nitrogen and phosphorus from sediment were tested. Test results show that the adsorption performance of natural zeolites on ammonia nitrogen and phosphate in water was significantly improved after Al-Zr modification. The adsorption model is chemical adsorption, and follows the quasi second-order kinetic equation and Langmuir model. The saturated adsorption capacity of 0.5 to 1.0 mm size of AZMZ for ammonia nitrogen and phosphate in water is 8.40 mg/g and 3.10 mg/g respectively. AZMZ has the potential to be used as in-situ covering materials to control the release of nitrogen and phosphorus from sediment. The average release rate was resduced by the increasing thickness of AZMZ. When the covering thickness of AZMZ reaches 0.5 cm, the releasing rate of nitrogen and phosphorus in the sediment can be effectively controlled. When the AZMZ thickness reaches 1.0 cm, the releasing reduction rate of nitrogen and phosphorus in the sediment are 89.1% and 75.3% respectively.
The study of influencing factors to straw mixed with livestock manure anaerobic fermentation
Authors: Peng Lei , Liu Shengyong , Chu Yajun , Jie Libin , Pan Yibo 
Published: August 2020

Abstract
Anaerobic fermentation of mixed raw materials is an effective method to solve the single raw material fermentation instability and adjust the carbon to nitrogen ratio during the fermentation process. In this study, manure and straw were used as mixed fermentation raw materials. The effects of mixed raw material types, total solid concentration, inoculum types and inoculation ratio on gas production efficiency were studied. The experimental results show that the total TS has the greatest effect on the biogas gas production effect. The pig manure and rice stalks are used as the mixed raw materials. The total TS is set to 10%. The inoculum is selected from the biogas slurry. The inoculation ratio is 30%. The gas rate is 0. 61 L/(L . d). The influence of four factors on gas production performance is: total solid concentration> fermentation raw material> types of inoculum> inoculation ratio. The test results have certain reference significance for anaerobic digestion of mixed raw materials.
Evaluation of bearing capacity of reinforced stone arch bridge based on static load test
Authors: Hu Chuanwen , Luo Wenbo , Chen Shunchao 
Published: August 2020

Abstract
In order to evaluate the stress and working performance of a reinforced stone arch bridge, the load test of the bridge is carried out. Static load test is to test the stress and displacement of each section of the main arch ring under the action of partial load and medium load. The results show that under the action of various loads, the check coefficients of deflection and strain of this bridge do not exceed the specification limit of 1.0 of masonry arch bridge, the actual working performance of the structure is good, the maximum value of relative residual strain and relative residual deformation are 11.11% and 8.21% respectively, and they do not exceed the standard allowable value of 20%, and the whole bridge is in the elastic deformation stage. The test results show that the reinforcement method of thickening the main arch ring has good application value, can effectively improve the service level of the old bridge and prolong the safety service life, and has obvious social and economic benefits.
RHBr/RGO composite material as an enhanced sensing platform can detect Cu2+ with high selectivity
Authors: Sun Peng , Xu Kaibing , Guang Shanyi , Xu Hongyao 
Published: August 2020

Abstract
This work reports a simple and efficient electrochemical detection method, using RHBr / RGO nanocomposite electrode material modified GCE to detect trace Cu2+. A simple and effective assembly method is used to prepare RHBr/RGO composite materials. After characterization by DPV and EIS, we discussed and optimized some factors that affect the detection of chemical sensors. Then DPV was used to evaluate the analytical performance of RHBr/RGO/GCE in the detection of Cu2+. Using optimal experimental factors, the linear response range of the sensor to Cu2+ concentration is 4×10−7∼1×10−5 M, and the detection limit is 3.9 nM (S/N = 3).
Properties of biochar from wood and textile
Authors: Han Tianhao 
Published: August 2020

Abstract
Due to population growth and economic activities, the increasing of generation and unreasonable disposal of waste biomass have been payed more attention than before. Traditional disposal methods may lead to environmental issues such as contaminating water and soil. This study explores the possibility of utilizing waste biomass to prepare biochar which can be used as addition in cementitious composites. This presents an obvious opportunity to recycle waste biomass as a construction material and use at large scale. In this study, wood and textile are feedstocks to prepare biochar and investigate their characterization. This study researched the information of different biochar by some basic parameters such as yield and water absorption. The pyrolysis of wood, textile and food waste was implemented to make different biochar. Meanwhile, the temperature was different according to these materials. 500°C of pyrolysis temperature was used to make wood and food biochar and 400°C and 300°C were for wood and textile biochar. The result explained that with increasing of temperature, the yield of wood and textile biochar was reduced.
Simulation Study on the Explosion Characteristics of Premixed Hydrogen-air Mixtures
Authors: Xiong Yanyi , Ma Yiwei , Zhao Huiping , Hu Yang 
Published: August 2020

Abstract
In order to study the explosion characteristics of hydrogen in the air and the influence of concentration on the explosion characteristics of hydrogen, the fire and explosion of small-scale hydrogen cloud with different concentration are simulated. The distribution of explosion characteristic parameters, such as overpressure, temperature and velocity, as well as the change rule with time, are obtained. The explosion characteristic parameters in horizontal and vertical directions are discussed The results show that under the influence of the ground and gravity, oblate elliptical fireballs with horizontal direction larger than vertical direction are formed in the early stage of ignition development. With the continuous combustion, they develop into hemispherical fireballs with the diameter of the ground and spread around. The influence of concentration on the law of fire and explosion is studied, and the maximum overpressure under different concentration is obtained, which provides support for building the fire field model of liquid hydrogen leakage. It is also of great significance for the evaluation of explosion hazards and the design of corresponding protection system.
Isolated carbonate platform reservoir multiple grouped discrete fracture network modelling
Authors: Zeng Xing , Song Heng , Xu Anzhu , Liang Xiuguang , He Congge , Liu Yunyang , Li Changhai , Luo Erhui , Chen Song 
Published: August 2020

Abstract
The fracture distribution on isolated carbonate platform is complicate congregation, it is necessary to accurately characterize fracture for oilfield development purpose. Based on the imaging logging fracture interpretation, this study analyzed the fracture grouping condition by sedimentary facies belt, also evaluated corresponding fracture intensity and orientation parameters; the fracture orientation trend for azimuth continuously changes fracture group can be established using the fracture group azimuth parameter; the intensity property calculation of each fracture group was carried out by Sequential Gaussian Simulation method under the seismic curvature volume control; each group’s discrete fracture network calculated from fracture intensity property and the analyzed fracture parameters accurately described the fracture distribution and orientation, the all groups together upscaled fracture property model shows permeability which consistent with with geological concept. This study shows: fracture features significant differentiated in each sedimentary facies belt on isolated carbonate platform, reservoir fracture can be characterized reasonably and accurately by azimuth trend control, thus lay the foundation for the reservoir simulation.
Study on the catalytic performance of Ag-P/HZSM-5 Catalyst for n-heptane at different reaction temperature and residence time
Authors: Miao Guangfa 
Published: August 2020

Abstract
One of the key technologies for the catalytic cracking of alkanes to produce low-carbon alkenes is the development of high-efficiency catalyst. This research prepared Ag-P/HZSM-5 and it had good regeneration performance. The continuous reaction regeneration experiment was carried out on the circulating fluidized bed experimental device, and the catalytic performance of n-heptane was investigated under the conditions of different reaction temperature and different residence time. The results showed that the conversion and yield of each product increased gradually with the increase of residence time, and the conversion rate of the reaction increased rapidly with the increase of reaction temperature. This can provide a basis for the research and development of new catalysts.
Research on prediction model of construction period of overhead line project based on BP neural network
Authors: Luo Kewei 
Published: August 2020

Abstract
With the stable development of economy and society, the power load increases year by year, so the power transmission company needs to build enough transmission lines to ensure the power supply. Overhead line project is the most commonly used form of transmission line, but the overhead line project often encounters the situation that cannot be completed on time, which affects the satisfaction of users’ electricity demand. Therefore, it is necessary to reasonably predict the construction period of the overhead line project, so as to provide a reasonable reference for the formulation of the production plan of the grid company. Firstly, this paper analyses the key factors that affect the construction period of overhead line project. Based on the BP neural network method, the construction period prediction model of overhead line project is established. The accuracy of the prediction is high.
Physicochemical characterization of pineapple peel wine
Authors: Zhang Li , Lu Wencai , Yuan Yuan , Wang Xiaofang , Zhou Wei , Liao Liangkun , Li Jihua 
Published: August 2020

Abstract
Pineapple peel was used for the elaboration of wine as an alternative to traditional fruit wine. The evolution of quality parameters of the wine throught the whole winemaking process was monitored. Significant changes occurred over the winemaking process were noted. Results pointed out that the utilization of pineapple peel in the fermentation of fruit wines was a viable alternative, which not only made full use of fruit waste resources, but also developed a new product into the market.
Research on Simulation Analysis of Valveless Hydraulic Servo System
Authors: Yahya Al-tayari Abdulmajid Mohammed , Siyu Chen 
Published: August 2020

Abstract
The hydraulic transmission technology is widely used in the industrial field. With the continuous development of microelectronic technology, valveless electro-hydraulic servo technology came into being. Aiming at the problems such as slow response speed and poor displacement tracking accuracy, this paper builds a simulation model of the forward and reverse displacement of the valveless electro-hydraulic servo system, and uses AMESim and simulink software to build the hydraulic part simulation and motor part simulation of the system respectively. A fuzzy PID controller is introduced and simulation is performed with the addition of the fuzzy PID controller to improve the overall performance of the valveless electro-hydraulic servo system.
Single-pole grounding fault location method for flexible HVDC transmission lines
Authors: Bian Jingfei , Dong Weiguang , Liu Jiongdei 
Published: August 2020

Abstract
One of the key problems of flexible HVDC transmission line is HVDC transmission fault location. A fault location method based on an improved traveling wave natural frequency flexible HVDC transmission line single-pole ground fault is proposed. The integrated empirical mode is used to decompose the fault signal to obtain the required traveling wave component, and then the improved MUSIC algorithm is used, according to the frequency spectrum analysis obtains the natural main frequency, and uses the relationship between the natural frequency and the fault distance to gain the fault location. Finally, use PSCAD to build simulation for simulation test and combine MATLAB fault location algorithm program to get the fault distance. The simulation results show that the proposed ranging algorithm is not affected by transition resistance and fault distance, and can accurately obtain the fault point distance, which shows the feasibility and effectiveness of the proposed fault ranging method.
Application of regional energy criterion in the prevention and control of coal mine rockburst
Authors: Meng Fanbao , Huang Jing , Xiao Peng , Pang Da , Jing Honghai 
Published: August 2020

Abstract
The current coal mine dynamic disasters severely restrict the high production and efficiency of coal mines. How to use modern mechanics to predict the rockburst scientifically and accurately has been paid more and more attention. In this study, the mechanism of coal mine rockburst is studied by the theory of fracture mechanics, the evolution process of coal mine rockburst is revealed from the energy point of view, the regional energy criterion of coal mine rockburst risk is established. The distribution of stress and plastic zone in the field is analyzed by FLAC3D. Based on theoretical analysis, the elastic energy cloud chart is established by using the FISH command to simulate the energy accumulation of roadway excavation. The results show that the tendency criterion of rockburst based on elastic strain energy well reflects the stage rule of damage evolution in the process of mining stress evolution, which provides an effective test basis for evaluating the risk of rockburst through energy parameters in the engineering field. This research has a certain theoretical guidance and practical value l significance for the prevention of rockburst.
Risk identification method of power grid division based on power flow entropy
Authors: Yangyu Hu , Qidi Huo , Xiaojun Tang , Meng Chen 
Published: August 2020

Abstract
This research introduced a new way to identify the weak area of power grid by the maximum entropy increase. The stable quantification of grid is judged by weighted power flow entropy index. The index of weighted power flow entropy can quantitatively evaluate the ordered stability degree of system key facts. A large number of simulation calculations of IEEE39 node system show that when the entropy of weighted power flow increases to 40-50% or more, the power grid is easy to enter the self-organized critical state, that is, the risk of blackout increases significantly. This paper studies the influence of the load growth in different regions on the entropy index of the whole system, and selects the region with the largest entropy increase as the weak region. The feasibility and effectiveness of the proposed method are verified by taking an actual power grid as an example.
Study on the application of ultra-high pressure hydraulic slotting in low permeability coal seam
Authors: Li Chengcheng 
Published: August 2020

Abstract
In view of the difficulty in solving the problem of coalbed methane drainage and mining connection in Wangpo coal mine, a new layout method of slotted hole and common hole is put forward by adopting the ultra-high pressure hydraulic slotting technology and combining with the characteristics of coal seam. The drilling construction technology and construction process are optimized. The amount of coal discharged by slotted hole is statistically analyzed, and the gas drainage concentration and extraction of common hole in slotted hole are investigated. The results show that the ultra-high pressure hydraulic slotting radius is 1.60m ∼ 2.26m, the average gas extraction concentration of slotted borehole is 54.88%, the pure gas extraction of slotted borehole is 51.4% higher than that of ordinary borehole, and the time of reaching the standard is 37.5% ∼ 50%. Therefore, the ultra-high pressure hydraulic slotting technology can better solve the problem of increasing permeability of low permeability coal seam, and provide a new way for the prevention and control of coal mine gas disaster.
Study on the Combined Conditioning Effect of High Efficiency Dehydration of River Sediment
Authors: Lin Jieli , Huang Minyi , Xie Zhihao , Liu Guohui , Zhu Haocheng , Yu Renrong 
Published: August 2020

Abstract
It is the most difficult problem for treating river sediment through the work of the whole river regulation. How to solve the problem of low efficiency of river sediment dewatering has become an urgent problem. In this paper, the sediment from the river of Chencun town in Foshan was chosen as the research object. Different kinds of conditioners were selected for single factor experiment, compound conditioning experiment of inorganic coagulants and organic flocculants, and combined conditioning experiment of adding self-made conditioner. The sedimentation speed, the turbidity and the water content were measured for analysis of the change of dehydration performance. The results showed that the effect of CPAM conditioning was the best in case of single factor experiment with the speed of 1.76 cm.min−1, the turbidity of 0.82 mg.L−1 and the water content of 60.21%. The lowest water content was under 60% in case of compound conditioning. When self-made PSM was combined with inorganic and organic conditioning for the sediment, the water content became 43.15% where the speed and the turbidity were equal to 2.80 cm.min−1, 0.23 mg.L−1, respectively. Therefore, the combined conditioning scheme not only improved the dehydration rate of sediment, but also improved the degree of sediment dehydration, which achieved the goal of high efficiency dehydration and low cost.
Research on Integration of Digital Protection of “Cultural Relics” Architecture and Virtual Reality Technology
Authors: Hua Gao , Jianfeng Huang 
Published: August 2020

Abstract
With the rapid development of science and technology, virtual reality technology has increasingly important value and significance in various fields. At present, the traditional digital protection techniques of cultural sites are through manual repair, construction and restoration, or in the form of text, pictures, film and television materials to protect the site. These digital protection methods are too simple, the data is not stored for a long time and is particularly vulnerable to damage. Therefore, it is urgent to find and apply a suitable digital technology. This paper is a study of the integration of digital protection of “cultural relics” and virtual reality technology.
Research of Ecological Landscape Assessment System Based on UAV
Authors: zhaoming Wang 
Published: August 2020

Abstract
This paper is taking the Baise-Leye and Molin highway as the study area, using UAV technique to investigate the eco-environment. With the advancement of computer technology, especially the development of remote sensing technology, the paper is using the UAV technique in the field of highway engineering will be more profound. The authors are taking the UAV image to extract model. The authors carry out highway environment simulation analysis.
Study on Operation Mode of High Speed Express
Authors: Meng Xiangru 
Published: August 2020

Abstract
With the rapid development of China’s market economy, the specialization of the industry tends to mature, and the modern logistics industry also presents a new development trend. Freight is an important link in modern. As a great artery of our national economy, railway plays an important role in modern logistics system. The demand for fast freight and high value-added transportation is increasing rapidly, which will promote the development of railway and bring opportunities and challenges to railway. Consumers can choose express delivery through high-speed rail transport, the railway sector can also transport express delivery to promote profit growth. This paper first analyzes the connotation of the operation mode of high-speed express delivery, analyzes the related enterprises of high-speed express delivery, compares and analyzes the existing three operation modes of self-organization, agent cooperation and strategic alliance, and puts forward the development countermeasures of highspeed express delivery in China.
Research on Indoor Patrol Robot Location based on BP Neural Network
Authors: Dong Liguo , Lv Junhao 
Published: August 2020

Abstract
With the development of science and technology, patrol robots play a more and more important role in indoor monitoring. It is the location of the abnormal situation that the most important task of the patrol robot is to display accurately, so studying its location is of vital significance. In the case of known indoor maps, it is indispensable for patrol robots to select the odometer which achieves accurate positioning. The traditional odometer is mainly realized by means of displacement, laser signal or multi-sensor fusion. However, the positioning often fails due to problems such as mechanical structure, error accumulation, power consumption and heating. In addition, the phenomenon that peripherals occupy limited robot resources is also prominent. To this end, this paper proposes to use BP neural network instead of sensors to obtain the odometer. This method is that the laser data, constructing the map of the robot, and the BP neural network determined are combined to achieve precise positioning and reduce development costs. Experiments have proved that this method may be used to improve the endurance of the robot battery in addition to accurate positioning.
A summary of research on customized bus route optimization for commuter needs
Authors: Lang Guoling 
Published: August 2020

Abstract
In order to solve the problems of inadequate existing road resources, rapid development of motor vehicles, and low comfort of traditional buses, a humanized customized bus is proposed, in which the network of customized buses is a key part of its operation. This article mainly summarizes the optimization of the customized bus line network at domestic and abroad, and finally draws the conclusion of this article.