bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis and Research on Rubber Joint of the Axle Box Rotary Arm of CRH3 EMU
Authors: Chong LU , Dong Bo , Cao Yu 
Published: June 2019

Abstract
In order to study the stiffness performance of rubber joint of axle box rotary arm for EMU, the rubber joint of axle box rotary arm for CRH3 EMU was studied by combining finite element analysis with experiment. The structural composition of rubber joint of axle box rotating arm and several strain energy functions of rubber hyperelastic materials are described. The material constants of Mooney-Rivlin and Ogden models are obtained by curve fitting of rubber material test data. The radial stiffness and the axial stiffness of the rubber joint of the axle box rotating arm are calculated by using the finite element simulation software, and the experimental verification is carried out at the same time. It is found that the results of Mooney-Rivlin and Ogden models are similar in the case of small deformation, and Ogden model is more accurate in the case of large deformation.
Study on Microstructure and Property of Hot-dip 55% Al-Zn Alloy Coating on 35CrMo Sucker Rod Surface
Authors: Jing Wu , Dong Liu , Linlin Zhang , Xiaopeng Yang , Xu Chi 
Published: June 2019

Abstract
The formation process and corrosion resistance of 55%Al-Zn alloy coating for 35CrMo sucker rod are studied in this paper. The study shows that reduction of Si content in coating bath can reduce Fe dissolving and also keep size of sucker rod stable at the same time. The coating is divided into intermediate layer and Al-Zn coating from inside to the outside. The main components of the intermediate compound layer are made up of Fe2Al5, FeAl3 and Al0.5Fe3Si0.5 by XRD analysis. Corrosion results indicate that the ratio of the weight loss between coated and uncoated sucker rod is 5.9:1 and the corrosion current density is 3:1.
An Improved PSO-FCM Algorithm for Image Segmentation
Authors: Peng Xia , Lin Yao , Zhang Li-Hua 
Published: June 2019

Abstract
FCM algorithm is a kind of soft clustering method widely used in image segmentation, but the algorithm is prone to fall into local minimum and sensitive to initial value. In this paper, considering the local and global optimization capabilities, an improved PSO algorithm is proposed. Image segmentation experimental results show that the improved algorithm not only can effectively avoid the local optimal value due to the manual setting of FCM initial value, but also has better accuracy and anti-noise performance than traditional FCM.
Optimization of Generator Stator End Winding Structure Based on Improved PSO and SVM
Authors: Zhou Yucai , Wang Ting , Bai Hua , Wang Shuyuan , Deng Bo 
Published: June 2019

Abstract
The selection of parameters in the support vector machine (SVM) approximation model plays an important role in the performance of the model. Therefore, the support vector machine parameters need to be optimized. Because the particle swarm algorithm is easy to be premature and easy to fall into the local optimal solution, the improved particle swarm optimization algorithm is used to optimize the parameters, and the support vector machine approximation model with optimal parameters is established. Finally, the support vector machine approximation model of optimal parameters and particle swarm optimization algorithm are combined and used in the optimization of stator end winding structure of large steam turbine generator. The validity of the method is verified by the analysis of the results, and good optimization results are obtained.
Electrochemical Chloride Removal Treatment of Reinforced Concrete at Different Ages
Authors: Guo Yaqin , Liang Duoqiang , Deng Yong 
Published: June 2019

Abstract
Electrochemical chloride removal (ECR) treatment of reinforced concrete at different ages was conducted to investigate to its availability. The experimental method is almost same to others. The experimental results obtained showed that ECE is efficient for the concrete of high porosity or old age.
Investigation on mechanical properties of artificially structured soils under different stress paths
Authors: Zhang Chong , Liu Enlong , Tang Yong 
Published: June 2019

Abstract
Natural soils are structured in deposit process. This is the biggest difference between the remolded soils and natural soils. As one of the stress-dependent materials, different kinds of stress-path have great influences on the mechanical properties of structured soils. Based on the triaxial tests on different kinds of stress path, the mechanical properties of structured soils and remolded soils are discussed in the paper. The main conclusions are as follows: under conventional triaxial compression tests, the sample of structured soils shows strain softening and volume dilation when the confining pressure is lower (25kPa); when the confining pressure becomes large (100 kPa and 200 kPa), the sample shows strain hardening and volume contraction; while, the remolded soils behave stress hardening and volume strain contraction under all kinds of confining pressures. Under triaxial extension tests, the sample of structured soils shows strain softening and volume dilation in the loading process; the remolded soils have strain hardening and volume contraction. Under constant mean stress loading path, the sample of structured soils shows plastic flow and volume strain contraction, while the remolded soils perform strain hardening and volume contraction.
Mechanical Property Study on the Planting Bar Strengthening Structure based on Midas/civil Solid Element
Authors: Li Zilong , Yang Jianming , Kang Fulong , Wu Qiongfang 
Published: June 2019

Abstract
When using Midas/civil solid element modeling to analyses a simple strengthening model by enlarging section method, it is found that the temperature stress of the model without implant reinforcing bars is very large under the overall temperature load, which is inconsistent with the actual engineering situation. When the model is implanted the reinforcing bars, the temperature stress generated by the overall temperature load becomes normal. It can be concluded that the defects of temperature stress anomalies caused by different linear expansion coefficients of different materials can be effectively corrected by implanting reinforcing bars in solid element models. When the defect of solid element model is corrected, its application prospects will become extremely broad, and it may eventually replace the calculation methods of internal force, stress and displacement provided by current engineering specifications.
Key Points of Construction Technology Management in Building Electrical Installation Engineering
Authors: Liu Chenguang 
Published: June 2019

Abstract
Studying the key points of construction technology management in building electrical installation engineering is the key to ensuring that the development of such projects can achieve the expected results. In order to achieve such an effect, this paper will first analyze the common technical problems in building electrical installation engineering, and then propose corresponding construction technology management methods on this basis, in order to provide theoretical reference for relevant construction units and management personnel.
Analysis of Mechanical Characteristics and Anchoring Effect of Bolt in shallow-buried Loess Tunnels
Authors: Jian LI , Chen Kun 
Published: June 2019

Abstract
Based on the current situation of design and construction in loess tunnels, the methods of mechanical monitoring and mechanical characteristics is used for the anchoring effects of bolts in shallow loess tunnels studied in depth. The on-site monitoring results show that for large-section shallow buried loess tunnels, after the bolts are removed from the arch, the construction time of each process can be shortened, which is better for controlling the surrounding rock deformation than the setting of the bolts; the result of theoretical analysis shows that the pattern of displacement distribution in the tunnel arch and the side wall is significantly different. The gradient of displacement from the tunnel vault to the surface is small, the surrounding rock of the arch is mainly sinking, the displacement of the side wall is relatively small, and the attenuation of displacement within the range of the bolt is faster than the arch. The research results will provide a theoretical basis for future advanced support design of loess tunnels.
Comparison Among Several Subsea Ground Settlement And Pore Water Pressure Monitoring Instruments In Offshore Deep-Water Channel Project
Authors: Liu Wenbin , Yan Zhao 
Published: June 2019

Abstract
The monitoring of subsea ground settlement and pore water pressure is key indexes for evaluating the safety of offshore channel engineering cases. The monitoring of settlement and pore water pressure for onshore cases is easy to proposed, and lots of instruments can meet the need. While for offshore engineering cases, the monitoring instruments should survive under extreme bad environment. This paper analyzed several monitoring instruments based on a 12.5 deep offshore channel engineering located at Nanjing city. A suit of instrument was final chosen after comparison.
Coupling Vibration Research on Vehicle-Bridge System
Authors: Zhou Ji-guo , Wang Gui-hua 
Published: June 2019

Abstract
Take vehicle running through a long-span cable-stayed bridge as an example to study the vibration rule of vehicle and bridge in the process of vehicles running on the large span bridge. Vehicle-bridge coupling numerical analysis model is established to study the changing rule of vertical displacement of the vehicle, vehicle wheel vertical contact force, the vertical displacement of the bridge and the impact coefficients of bridge while different quality of vehicles running on the bridge. The results show that, the heavier the vehicle, the greater and the more obvious wave of the vertical displacement change of bridge main-span across. The heavier the vehicles, the more obvious the change of the vertical displacement and torsion angle of cable-stayed bridge main-span across.
Risk Assessment of Water Penetration for Shield Tunnel Construction in Coastal Area
Authors: Wu Bo , Deng Zheng , Huang Wei 
Published: June 2019

Abstract
In the process of assessing the risk of flooding during the construction of shield tunnel in coastal area, the basic probability of accidents is often difficult to be expressed by an exact numerical value due to the fact that the actual statistical data of accidents are too few or missing. In order to solve this problem, this paper, with the factors by combining the fuzzy Bayesian network inference advantages and the advantages of the fuzzy set theory to deal with fuzzy information, using a risk assessment method based on fuzzy Bayesian network method, established the waterfront subway shield tunnel construction risk decision model and predicted the subway shield tunnel flooded the area of probability; at the same time, the sensitivity of each basic event was calculated according to the fuzzy significance to identify the key risk factors, and the applicability and accuracy of this method were verified by combining with the regional engineering of Hujing station ∼ Wanshou station of Fuzhou Metro Line 6.
Seismic performances of highfill airports during the recent strong earthquakes in China
Authors: Meng Di 
Published: June 2019

Abstract
High-fill slope with gap-graded fillback material and impervious clay sublayer is the typical structure of airfield in mountainous area. The seismic response of such slopes under intense earthquake loadings is one of the major concerns in engineering practice. This paper presented seismic performances of three typical high-filled airports during the recent strong earthquakes in China, and the damage/failure mechanisms are discussed. The main finding of this study is that, although no direct airport fill failures were found during earthquakes, cracks formed in airfield by strong shaking could provide passages for rainfall, where preference flows develop gradually and will significantly soften fillback material and impervious clay sublayer, inducing slope failure. Numerical and physical modelling and mitigation techniques are of high priority. After earthquake, timely site investigation, monitoring and slope repairment are greatly needed to prevent destructive deformation during the rainy period.
Effect of bias voltage on microstructure and properties of magnetron sputtering TaN coating
Authors: Yubao Zhang , Zhigang Li , Jinfeng Li , Nan Zhang , Hongtao Zhao 
Published: June 2019

Abstract
A series of TaN films were coated on Al2O3 at various bias voltages by magnetron sputtering technique. Effect of bias voltage on the microstructure, roughness, deposition rate, binding force of coating-substrate, electrical properties of the TaN coating were investigated by X-ray diffraction (XRD), atomic force microscope (AFM), profile meter, scratch tester and four points probe respectively. The results suggest that the TaN coating were formed by face-center δ-TaN crystals and the preferential orientation of the coatings varied with the bias voltage; the deposition rate and the binding force of coating-substrate reached maximum value of 5.71nm/min and 4.5N when the bias voltage was 80 V, the roughness and the square resistance reached the minimum value of 0.509nm and 15.58Ω/□
Single-phase Ground Fault Line Selection for Distribution Network Based on Frequency Domain Parameter Identification Method
Authors: Cheng Siwen , Fu Zhouxing 
Published: June 2019

Abstract
All articles must contain an abstract. The abstract text should be formatted using 10 point Times or Times New Roman and indented 25 mm from the left margin. Leave 10 mm space after the abstract before you begin the main text of your article, starting on the same page as the abstract. The abstract should give readers concise information about the content of the article and indicate the main results obtained and conclusions drawn. The abstract is not part of the text and should be complete in itself; no table numbers, figure numbers, references or displayed mathematical expressions should be included. It should be suitable for direct inclusion in abstracting services and should not normally exceed 200 words in a single paragraph. Since contemporary information-retrieval systems rely heavily on the content of titles and abstracts to identify relevant articles in literature searches, great care should be taken in constructing both.
The Attractive Distribution of the Renormalized Permeability in 3D Case
Authors: Mehedi M F U , Li Zhanke , Liu Zhifeng , Wang Xiaohong 
Published: June 2019

Abstract
In this article, the renormalization process for the permeability and the attractive distribution of the renormalized permeability are investigated. It is known that the attractive distribution is log-normal for 2D case but it isn’t for 3D case. It is discovered that the renormalized permeability from infinite system is independent of the attractive distribution variance. Making use of this important property, numerical simulation is then performed to find the specific form of the attractive distribution. Based on the numerical results, it is shown that the attractive distribution is 1/3-normal in the 3D case.
Application of two-dimensional mathematical model in backwater calculation for flood control evaluation of mountainous rivers
Authors: Jiang Xiu-juan , Han Yan , Du Jun , Jiang Ru-cheng 
Published: June 2019

Abstract
Flood control impact assessment of construction projects within the scope of river course management shall be conducted in accordance with relevant laws and regulations. The calculation of backwater is an important content of flood control evaluation of Bridges across rivers. Two-dimensional mathematical model is a main method for flood control evaluation of backwater calculation. This paper introduces the basic principle of the two-dimensional mathematical model and applies the two-dimensional mathematical model in the actual application of flood control evaluation of the great Darui Railway Bridge of Ruili River, analyzes the changes of water level, flow rate and flow direction before and after the construction of the bridge, and uses the standard formula method to check. The results show that the two-dimension mathematical model has a high accuracy in the calculation of backwater of flood control evaluation of Bridges over mountainous rivers, which can provide scientific basis for flood control evaluation of projects.
Substation Area Backup Protection Algorithm for Phase Comparison of Segregated Current Fault Component
Authors: Zhao Jianwen , Zhang Junming , Zhang Yanqing 
Published: June 2019

Abstract
Substation area backup protection currently only relies on the traditional relay protection principle, and does not fully exploit the inherent fault characteristics in the multi-source data of the station domain. In response to these problems, this paper proposes a substation area backup protection algorithm for phase comparison of segregated current fault component. The algorithm takes all electrical elements in the substation station as the protection object. In light of the phase relationship between external faults and internal faults of the protected electrical elements, the phase relationship is quantified and the fault elements are identified according to the quantified results. A typical 220 kV intelligent substation model was built by using electromagnetic transient software PSCAD. The different fault types, fault locations and transition resistance operating states were simulated. The results show that the fault recognition method based on substation area backup protection for phase comparison of segregated current fault component is accurate and effective.
Study on the Treatment of Aluminum Milling Wastewater by Electrode-Fenton Method
Authors: Li Ru , Wang Peng , Gu JunLi 
Published: June 2019

Abstract
Aluminum alloy chemical milling wastewater is the wastewater produced in the washing process after aviation aluminum chemical milling. According to its characteristics of high alkalinity, high concentration of organic compounds and difficult biochemical treatment, the electro-Fenton method was used in this study. Electro-Fenton method mainly is the Fenton reaction between Fe2+ and hydrogen peroxide produced by electrolytic dissolved oxygen to produce HO⋅, which reacts with organic pollutants and mineralizes. In the experiments, activated carbon fiber and Ti/RuO2 – IrO2 were used as the cathode and the anode, respectively. The experiments showed that the optimal initial pH value of degradation was 3, voltage was 40V, and the concentration of Fe2+ was 0.5mmol/L, plate spacing was 5cm, the concentration of Na2SO4 was 10g/L, the aeration intensity was 125L/h, and the reaction time was 120min, the average removal rate of COD was over 50%. Under optimum conditions, the study established a dynamic model and educed that it could be described with first order dynamic model. The fitting equation is: Cr
=C0
exp(-1.2879C
0
−0.8253
t).
Analysis of converter insulation characteristics and selection of restraint resistors
Authors: Xu Yufu , Chen Kerui , Geng Ning , Zhao Dongsen , Cai Zhiyong 
Published: June 2019

Abstract
The commutation structure is a composite insulation structure composed of oil, paper and cardboard. The converter transformer usually adopts positive and negative adjustment, and the polarity selector generates a recovery voltage and a breaking circuit between the opened contacts during the switching process. It is usually necessary to use a tie resistor to make a potential connection to the voltage regulating winding to limit the recovery voltage. At the same time, in order to shorten the time of the potential resistance access and reduce the no-load loss of the transformer, a potential switch is required to be used in conjunction with the tie resistor. In this paper, the characteristics of the floating potential and the capacitor current during the switching of the positive and negative voltage-regulating windings are analysed. The relationship between the arrangement of the commutating windings and the recovery voltage is given. The positive and negative floating suspension breaking capabilities of the contacts are analysed by examples. The calculation basis for the selection of the binding resistor is given, and relevant conclusions are given.
Growth characteristic of microbubble in a T-junction microchannel in microfluidic chip
Authors: Sun Lixia , Fan Mingxu , Xu Bo , Yu Huadong , Wang Yue , Zhang Yufeng , Li Peng 
Published: June 2019

Abstract
Microbubble formation in a T-junction microchannel in polydimethylsiloxane (PDMS) microfluidic chip were developed. The experiment based on high-speed microscopic camera system was set up to investigate the effects of liquid flow rate, gas pressure and gas channel width on microbubble growth. Three stages of microbubble growth process were obtained through the experiment firstly. The control variable method was used for investigating the growth characteristics of microbubble, including volume change rate and the ratio of length to width. The present study provided an empirical reference for the growth of microbubble in microchannel, which helped to achieve precise control of microbubble volume.
Cr(VI) Adsorption on Acid Modified Diatomite
Authors: Ma Hongfei , Yu Fengmei , Li Wei , Li Zheng , Guo Wenmiao , Yao Xiuqing , Tian Yiming 
Published: June 2019

Abstract
Cr(VI) adsorption onto diatomite has been investigated. Cr(VI) adsorption effects on original diatomite and acid modified diatomite were compared. The adsorption kinetics of Cr(VI) on acid modified diatomite were described by pseudo-first-order and pseudo-second-order models. The experimental data fit to pseudo-second-order kinetics better. Langmuir and Freundlich isotherms were used as the model adsorption equilibrium data. The thermodynamic parameters were evaluated including ΔG (Gibb’s Free energy change), ΔH (enthalpy change), and ΔS (entropy change).
Analysis on the Development Path and Potential of Electrification Level in the Field of Transportation in China
Authors: Wang Chengjie , Liu Xiaocong 
Published: June 2019

Abstract
In view of the current low level of electrification in global and Chinese transportation, this paper selects five key areas to improve the level of electrification, such as electric vehicle, urban rail transit, electrified railway, ship shore power and airport bridge equipment, carries out technical and economic analysis, and studies and evaluates the future development trend of the five technologies. Finally, according to the situation in 2020 and 2030 respectively, this paper carried out the calculation of electrification improvement potential. The research results provide a key path for improving the electrification level in the field of transportation, and analyze the feasibility and future potential of the path, providing a reference for the global and Chinese governments to improve the electrification level in the field of transportation.
Simulation of implementing the function of SSSC converted from grid paralleling device based on power transmission
Authors: Liu Jiajun , Yang Song , Wang Kun 
Published: June 2019

Abstract
Grid paralleling device based on power transmission can be converted into a static synchronous series compensator after grid connecting successfully. At present, the power grid becomes more and more complicated, and short-circuit faults occur frequently. In order to regulate the system power flow and limit the short-circuit current of the system, it is worthwhile to develop the function taking advantage of the characteristics of the existing equipment. In this paper, the control strategy of adjusting power is obtained by establishing SSSC model. Meanwhile, according to the nature of SSSC which can be equivalent to series impedance, the current limiting function of SSSC in the event of short circuit fault is further analyzed. Finally, building the equivalent model of SSSC in PSCAD / EMTDC, the simulation results show that changing the equivalent impedance of SSSC can regulate the flow of line transmission effectively, and prove that SSSC has a certain current limiting function in case of short-circuit.