bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation of Preparation of Biochar-based Sustained release Fertilizer from Filter Mud of Sugar Mills and Its Properties
Authors: Xiang Min , Liu Faqiu , Zhou Shaoji , Tang Qiuping , Li Kai 
Published: April 2020

Abstract
In order to make better use of the filter mud from sugar mills, biochar was prepared by pyrolysis of the mud at 500, which was then to absorb urea to produce sustained release °C fertilizer pellet, using soluble starch as the binder. The pellet shaping, the mechanical properties and the sustained-release effect of the pellet fertilizer were studied. The results showed that 22-26% water content was favorable for pelleting the biochar-based fertilizer, improving the maximum crushing compression force (MCCF) of the pellet. The pelleting rate and its MCCF decreased with the increase of biochar content. The sustained release effect of the pellet fertilizer was better than that of traditional fertilizer, and the sustained release effect increased with the increase of biochar content and soluble starch content. The optimum conditions in terms of pelleting rate, MCCF, sustained release performance and cost-effectiveness were the ratio of urea to biochar of 1:5, the content of soluble starch 10% and the amount of water 24%. The release of the biochar-based fertilizer was in accordance with the first-order release model.
Influence of Milling Time on Productivity of Boron Nitride Nanotubes Synthesized from B2O3 by Ball Milling and Annealing Method
Authors: Li Yanjiao , Liu Bin , Qin Zhongbao , Hou Li’an 
Published: April 2020

Abstract
Ball milling and annealing method is an important method for synthesis of boron nitride nanotube. How to improve their productivity through this method is a problem that people have been studying all the time. In this paper, the influence of milling time on productivity of boron nitride nanotubes synthesized from B2O3 through ball milling and annealing method was investigated. The result indicated that the optimal milling time for synthesis of BN nanotubes with high productivity is 80h. The reason for formation of these high productivity BN nanotubes can be ascribed to the high chemical reactivity and appropriate amount of catalyst in B2O3 powder milled for 80h. The results of this study can provide guidance for the preparation of high yield BN nanotubes.
Determination of Selected Organophosphorus Insecticides and Their Oxides in Tea and Soil by HPTLC
Authors: Zhang Rong , Leyi Chen , Fan Yu , Zhang Jian 
Published: April 2020

Abstract
A determination method of selected organophosphorus insecticides and their oxides (Parathion- methyl and Dimethyl- paraoxon; Parathion and Paraoxon; Chlorpyrifos and Chlorpyrifos-oxon.) in tea and soil was developed with high performance thin-layer chromatography (HPTLC). The acetonitrile was applied to extract tea sample and the tandem column of solid-phase extraction was to clean samples up. The soil sample was extracted with ethyl acetate and not to be clean-up. The processed samples were directly applied as bands to glass-backed silica gel 60F254 HPTLC plates. The plates were developed by AMD with 7-step for tea samples and 2-step for soil samples. Evaluation of the developed HPTLC plates was performed densitometrically. Three fortification levels of the samples were conducted in the test. In this method, the detection limits of parathion-methyl, dimethyl-paraoxon, parathion, paraoxon and chlorpyrifos-oxon were from 3.0×10–9 g to 1.0×10–8 g in different development systems. The chlorpyrifos was from 7.0×10–9 g to 2.0×10–8 g. Recoveries of the pesticides residues from tea were 68.98-116.73%, and the soil were 69.44 –120.00 % except the chlorpyrifos. The relative standard deviations were 4.02–17.50 % for tea, and 3.11–14.20 % for soil except the chlorpyrifos. The Rf value and the validation data were given. The development by AMD in this method was discussed.
Application Research on the Fiber Bragg Grating Sensing Technology in Arch Dam Model Test
Authors: Wang Senhao , Chen Yuan , Sun Tao , Yang Baoquan 
Published: April 2020

Abstract
Fiber Bragg Grating (FBG) has the advantages of high sensitivity, high resolution, low cost and small volume. Therefore, FBG sensing technology is widely used in the monitoring of structural engineering. In this research, FBG sensing technology was applied in the geo-mechanical model test of arch dam for the first time. The geomechanical model of Lizhou arch dam was built, and the FBG sensors were arranged on the upstream dam surface, while the resistance strain gauges were arranged on the downstream dam surface. The model failure test was carried out to get the stress-strain state and its changing process of the dam body. The test results show that the monitoring results of the FBG sensors and the resistance strain gauges are basically consistent, and it is found that the initial cracking overloading safety coefficient is K
1 = 1.4 ∼ 2.2, the nonlinear deformation overloading safety coefficient is K
2 = 3.4 ∼ 4.3, the ultimate overloading safety coefficient is K
3 = 6.0 ∼ 6.6. The application of FBG technology provides a method to solve the problem that the strain of the upstream surface of the arch dam model cannot be directly monitored due to the insufficient space caused by the installation and loading system, and also provides a new idea for the measurement technology in the geo-mechanical model test.
Research on the Electric Lifting of the Corner Transmission Tower
Authors: Chen Zhenjia , Chen Kongliang 
Published: April 2020

Abstract
By establishing the finite element model, the reliability of the corner transmission tower is analyzed before and after jacking. The calculation conditions are divided into four types: self-weight working condition before jacking of electric tower, wind load working condition before jacking, self-weight working condition after jacking, and wind load working condition after jacking. The results have been compared and analyzed by analyzing and calculating model and internal force of each working condition. The results show that there is not much deviation between the unit stress and the internal force bending moment of the key parts, which meets the normal use requirements. Under the wind load conditions of the transmission tower, the stress of the tower tower increases, but it is not obvious, which shows that the charging jacking technology of the corner transmission tower is safe and reliable.
Experimental Study on Determining Elastic Modulus of Integrated Bamboo with Deflection Method
Authors: Wei Liuchuang , Wei Ping 
Published: April 2020

Abstract
This paper mainly studies the experimental method of elastic modulus measurement of integrated bamboo. In this paper, experiments were carried out using rectangular section rods made of integrated bamboo. During the test, the rod was fixed at one end and the other end was cantilevered. A concentrated load is applied to the cantilever end of the rod to measure the projection of the rod end laser pointer on the projection plate. According to the calculation relationship between the projection displacement, the load and the elastic modulus, the elastic modulus of the integrated bamboo is measured.
Identification of SSI Damping System Based on Large-Scale Shaking Table Test
Authors: Zhiying Zhang , Yihe Yin , Xin Tian , Lizheng Song 
Published: April 2020

Abstract
Damping system represents the pattern and characteristics of energy dissipation in a dynamical system. The correct identification of a damping system is not only the premise of selecting dynamical analysis method but also the foundation of obtaining accurate results in seismic analysis. Traditionally, the identification of a damping system under seismic waves is based on material properties. However, this method is the lack of theoretical and experimental research. Based on the most fundamental identification method, the paper presents the study on the consistency of dynamic characteristics between different parts and continuity of motion states at the interfaces of the SSI (Soil-Structure Interaction) system by shaking table test. The changing law of SSI damping system in different dynamic processes is investigated. The experimental results indicate that the SSI system manifests obviously classical energy dissipation characteristics under certain conditions and can be considered as an approximate classical damping system.
Research of Toppling Criterion and Analysis of Instability Evolution of Toppling Deformation Slope
Authors: Zhou Heng , Huang Peng , Di Shengjie , Wang Mingjiang 
Published: April 2020

Abstract
Toppling failure is one of the main types of rock slope instability. Based on the Goodman-Bray toppling stability analysis model, the starting mechanism and criteria for toppling deformation are deduced. Combined with the discrete element numerical simulation method, the evolution failure mode of the toppling slope is studied, which can better reflect the basic regularity of the toppling failure, and provide support for slope engineering. In order to predict the influence of the foot displacement of the leading edge on the slope surface displacement, several monitoring points are set at the boundary of the slope and the bend of the toppling body. It is of great engineering significance and practical value to make safety early warning in time.
Inspection scheme and disposal measures for abnormal vibration and noise of EMU
Authors: Guoping PENG , Li HUANG 
Published: April 2020

Abstract
There are different forms of abnormal vibration and abnormal noise of the EMU, involving many types of components, and many components cannot be judged through visual inspection, and some components cannot even be visually inspected. This article analyzes the characteristics of different types of vibration or abnormal sounds, and provides suggestions for troubleshooting and treating measures to guide subsequent similar failures.
Study on line Vibration Characteristics of Equipment for Electric Multiple Units
Authors: Wang Chengqiang , Shi Huailong , Qi Yayun 
Published: April 2020

Abstract
The rigid-flexible vibration of high-speed train will cause the violent movement of equipment. This paper first introduced the high-speed EMU equipment and the theory of mass tuning vibration absorption. Then according to the test data, the vibration response of the bogie frame and the vibration response of the equipment, and the vibration response of the equipment under different lines are analyzed. The results show that the lateral vibration frequency of the frame is 4.5 Hz in normal section, and the lateral vibration frequency of the frame is 7.4 Hz in hunting excitation section. During the normal vibration line, the vibration of the equipment is significantly larger than that of the carbody, the vibration characteristics of the frequency domain of the equipment is mainly high-frequency magnetic vibration, the high-frequency vibration of the equipment above 15Hz is not transmitted to the carbody. When the running speed is increased, the vibration of the equipment is enhanced, and the line condition also has an important influence on the vibration of the equipment.
A Review of True Orthophoto Rectification Algorithms
Authors: Li Tingting , Jiang Chunshan , Bian Zhenqi , Wang Mingchang , Niu Xuefeng 
Published: April 2020

Abstract
Orthophoto is one of the most important basic geographic information products. Because traditional orthophotos use incomplete surface information for digital differential rectification, there is mutual occlusion between images, which is difficult to meet the current large-scale urban mapping requirements. With the rapid development of photogrammetry technology and the increasing demand for high-precision graphics, the true orthophoto has become a major research hotspot at home and abroad. This paper expounds the development of the true orthophoto rectification, summarizes the relevant algorithms for the true orthophoto production, and points out the core problems and future development of the true orthophoto production. Through the summary and analysis of the image rectification algorithm, the image occlusion detection, shadow compensation and other issues are proposed. The morphological filtering algorithm is used to identify buildings in densely populated areas, and the PCNN model method enhances texture features, and combing the deep learning for shadow compensation, in order to optimize the actual image rectification algorithm for existing images.
Flaw detection in concrete media using XFEM and an improved artificial fish swarm algorithm
Authors: Zhao Wenhu , Du Chengbin , Li Xinzhu 
Published: April 2020

Abstract
A novel strategy is proposed in this paper for identifying and characterizing the irregular flaws in heterogeneous media. The optimization iterations are implemented by using the improved AFS algorithm and the corresponding forward analyses are solved by XFEM. A series of candidate sub-defects are employed to describe each flaw jointly. Each candidate is devised as a square void with the boundaries matched the XFEM meshes to avoid subdividing the enriched elements. The K-means cluster algorithm is utilized to narrow the searching space and output the number of flaws. A typical numerical example is conducted to demonstrate the proposed strategy. The result indicates that this strategy can identify the irregular flaw and it is potential to be applied in the evaluation of the civil and hydraulic structures.
Measurement management of electronic instruments
Authors: Luan Yuanling , Zhang Shisong , Zhang Jianfei 
Published: April 2020

Abstract
With the continuous development of science and technology, electronic instruments and meters measuring equipment in accuracy, accuracy and sensitivity has been rapid development, and widely used in scientific research and production in China. As a measuring tool, instrument measurement can detect, analyse and manage products, effectively improve product quality in product production supervision and inspection, effectively reduce resource waste, and protect the legitimate rights and interests of users. Although the accuracy of electronic instruments is required more and more, due to poor management, there are often various problems in the use process. In this paper, combined with the extensive needs of electronic instruments in the new situation, the current development status of electronic instruments in China is analysed, and relevant improvement measures are put forward for the problems, aiming to strengthen the measurement management of electronic instruments and ensure the smooth progress of scientific research and production.
Cinite Element Analysis of Hydraulic Slope Stability Based on Strength Reduction Method
Authors: Wei Ping , Wei Liuchuang 
Published: April 2020

Abstract
Slope stability analysis is a hot research topic in geotechnical engineering. According to the actual engineering hydraulic slope stress, based on the strength reduction method theory, the finite element software ANSYS is used to analyze the stability of a hydraulic slope engineering, and the effective safety factor of the slope is obtained, which is safe for other slopes. Support design provides a reference.
Application Research of BIM Technology in Highway Reconstruction and Extension Project
Authors: peng Dong , chao-ming Chi , xin Yan , ming-fa Wang , run-zhi Zhang 
Published: April 2020

Abstract
Relying on its own technological advantages of data integration, information sharing, management cooperation and visualization, BIM technology is gradually applied to highway reconstruction and extension project construction. The applications include 4D simulation technology of construction organization scheme, traffic organization simulation technology, digital interactive virtual sand table technology and project collaborative management platform will be helpful to break through the bottleneck of highway traditional construction management and realize the leap-forward promotion of informationization and fine management level of highway reconstruction and expansion project construction.
Parking Area Data Collection and Scenario Extraction for the Purpose of Automatic Parking ADAS Function
Authors: Wang Lei , Yu Bo , Chen Chao 
Published: April 2020

Abstract
Automatic Parking is the most significant ADAS function that could achieving mass production in the field of unmanned driving. For the purpose of automatic parking function, we’re foundamentally facing the corresponding data collection and data analysis.In view of three classical parking scenarios,this paper is concentrating on three contents including the sensor hardware construction, the perception algorithm development,and scenario data analysis.For the the hardware construction,we focus on the sensor installation,time calibration,and space unification.Based on the front camera and RADAR data fusion,we put great emphasis on the multi-target matching and fusion algorithm. And for the purpose of the scenario extraction and big data analysis work, we are developing automatic big data processing Python code,realizing TB level original data labeled, and data completely processed in short time.The whole technology process and tool chain in this program,have extensively high level scientific research and commercial value
Numerical Analysis of Steel Cylinder Anchorage Deformation for Suspension Bridge
Authors: Xu Binbin 
Published: April 2020

Abstract
In this paper, the deformation of the new structure under the tension of the suspension bridge is calculated and analysed in detail using the finite element software. The maximum horizontal displacement is about 6.65cm, which is located at the top of the anchor structure. The downward vertical deformation occurs at the side of the anchorage structure, with the maximum value of about 2.7cm. The upward vertical deformation occurs at the rear of the bearing surface, with the maximum value of about 3.0cm. The deformation of the anchorage in this scheme satisfies the specification requirements.
Probability distribution and influence factors on corrosion initiation of reinforcing steel induced by chloride
Authors: Yu Faqiang , Liu Wenchao , Gao Weiwei 
Published: April 2020

Abstract
Chloride-induced corrosion of steel in reinforced concrete structures is one of the major causes of their deterioration over time. Chlorides from de-icing salts or marine breeze penetrate through the concrete cover and break down the natural protective oxide layer formed around the reinforcements by the strong alkalinity of pore solution. As a matter of fact, the free chloride in concrete could not transport through reinforcing steel and accumulated at front point of reinforcing steel rapidly which made reinforcement corrosion initiation earlier. Therefore, the current studies on corrosion initiation might be hazardous without considering the obstruction action of reinforcing steel. In this paper, the Fick’s second law was used to describe the free chloride concentration evolution in concrete and obstruction action of reinforcing steel was considered. The influences of the variability on boundary chloride concentration, thickness of concrete cover, and chloride diffusion coefficient on cumulative distribution of corrosion initiation of reinforcing steel were studied thoroughly. The obstruction of reinforcing steel gave much influence on corrosion initiation, especially for thinner concrete cover, higher concrete strength, and higher environmental temperature.
Application of Ant Colony Algorithm in Selecting Shortest Engineering Path
Authors: Tian Jinsong , Chen Manyu , Chen Chao , Liu Xin 
Published: April 2020

Abstract
In engineering surveying, topographic maps can be used to find the shortest path. Traditional methods identify the smallest radius based on the design slope before finding the shortest path. This paper, by using the ant colony algorithm and MATLAB software, manages to select the shortest path in engineering practice, and compares the result with that obtained using the genetic algorithm. The results show that the ant colony algorithm can be applied in selecting the shortest path in engineering projects and it can deliver a stable and optimal result after 240 times of iteration. However, the genetic algorithm cannot achieve that even after 400 times of iteration. Therefore, the ant colony algorithm is superior to the genetic algorithm in the aspect of the calculation speed, the stability of achieving the optimal solution, and selection of the shortest path.
A Method of the Voronoi Seabed Sedimentary Domain Boundary Reconstruction
Authors: Zhang Jin , Li ShuJun , Wang Mo 
Published: April 2020

Abstract
Seabed sediment point data is the data basis for expressing the sediment elements. The determination of the extent of the seabed sediment type is the data base of the geometric model and the seabed sediment thematic chart. For the existing point element selection method cannot meet the application requirements. This paper uses the weighted idea to different data density and complex marine environment. Taking into account the trend of the sediment size and charting compensation effect, the influence weight of the point-like bottom data is analyzed, and the range of influence is reasonably determined. It provides a certain reference for the production of seabed sediment thematic chart and has high use value and broad application prospects.
Correlation between PM concentrations and meteorological conditions in Chengdu based on in-situ observations
Authors: Haoran Jia 
Published: April 2020

AbstractAtmospheric aerosol particle plays a vital role in the Earth’s radiation budget, affecting human health by raising air pollution events, which have become remarkably common in megacities of China. Three sites in Chengdu city were selected for measurement of air quality index(AQI) and pollutants like PM2.5, PM10, SO2, NO2, whose concentrations were indicators of air quality. The association between air pollution in terms of AQI (pollutants’ concentrations) and meteorological conditions like Relative Humidity(RH) and Wind Velocity(WV) have been evaluated in this study. The results show that AQI peaked on June 22ndand Jul 16th, when PM2.5and PM10dominated. Further analysis reveals that only PM2.5and PM10are related to RH. In particular, PM2.5(PM10) intends to decrease when RH increases with a coefficient of -0.4(-0.57). However, there is no evident co-variation between RH and SO2(NO2). The results also indicate that concentration of NO2decreases when WV increases with a coefficient of -0.66. By contrast, corresponding relationship between PM2.5(PM10) and WV is less evident.
Cloning and Expression Analysis of δ-OAT Gene from Saccharum spontaneum L
Authors: Yao Yanli , Xu Lei , Hu Xiaowen , Liu Yang 
Published: April 2020

Abstract
Full-length cDNAs of ornithines-δ-aminotransferase (Ssδ-OAT) were isolated from Saccharum spontaneum through homologous clone strategy. The sequence of this gene was then deposited in GenBank database with the accession number KX714115. Sequence analysis showed that the full length of the δ-OAT gene was 1373bp, the open reading frame was 1365 bp, it was inferred that coding 454 amino acids, the isoelectric point and the molecular weight of coded protein were 6.16 and 49.5 kD, respectively. According to the phylogenetic tree, the evolution of Ssδ-OAT corresponds with traditional biological classification. Its functional domain has a high conserved property in the process of biological evolution. Prokaryotic expression vector pEASY-E1-Ssδ-OAT was established and transformed BL21 (DE3) into E. coli after IPTG induction, showing a successful gene expression. The expression pattern analysis carried out by quantitative real-time PCR indicated that the gene expression level was significantly up-regulated under drought stress. The relative expression of the gene reached to the maximum under 6d treatment. It was the first time to obtain δ-OAT from Saccharum spontaneum L, Ssδ-OAT responded to water stress, it was inferred that δ-OAT played a role in resistance to osmotic stress.