bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on the Mechanical Properties of Large Rectangular and Shallow Embedded Pipe-Jacking During Pushing-Process
Authors: Yunchen Wang , Jianhua Huang , Luming Yang 
Published: December 2019

Abstract
With the continuous increase of urban population, the development degree of urban underground space is increasing, and the pipe jacking method has been widely used in the construction of urban underground space. This paper analyzes the disturbance mechanism of the pipe jacking construction on the surrounding soil, and analyzes the actual results of the surface subsidence in the rectangular pipe jacking project of Baima Road in Fuzhou Baolong Wanxiang Square and the civil defence project. By combining the three-dimensional finite element model, the law of ground surface settlement and deformation during the construction of shallow-buried large-section pipe jacking under the conditions of coastal stratum is studied. And through the on-site monitoring settlement data of the project and the finite element simulation, the ground surface subsidence deformation law and the pipe-tube stress variation law of the shallow-buried large-section pipe jacking under the coastal stratum are mastered, which can be used for the design and construction of related similar projects for reference in the future.
Experimental investigation on double lipped channel cold-formed thin-wall steel column under compression loading
Authors: Shi Yijian , Lin Bing , Zhang Qingyu , Zhang Pingping 
Published: December 2019

Abstract
:In order to investigate the compression behavior of double lipped channel cold-formed thin-wall steel column used in Box housing, a total of 12 columns with three different lengths(3000mm,2556mm,2000mm, respectively)and two different thickness(3mm, 4mm )were tested to investigate the ultimate load-carrying capacity and deformation behavior of cold-formed steel. It is found that the thickness has an obvious effect on compression ultimate load-carrying capacity, while the length does not have much influence. The failure modes of most specimens contain local buckling. Test analysis result simulated by finite element analysis (FEA) agreed well with the experimental data, which verified the FEA analysis method is appropriate. The analysis method provided in this paper can be referenced for the design of Box housing.
Experimental study on the effect of reinforcement ratio on the ultrasonic velocity and modal frequency of concrete members
Authors: Zhou Xiwu , Wang Xiangyu 
Published: December 2019

Abstract
In order to study the effect of reinforcement ratio on ultrasonic sound velocity and modal frequency of reinforced concrete members, 13 concrete circular cross-section short columns were designed to detect the ultrasonic sound velocity and self-strain of short columns with different cuff ratio and longitudinal reinforcement ratio. Compared with non-reinforcing short columns, the results show that the stirrup reinforcement ratio is from 0.4% to 1.667%, the ultrasonic sound velocity is increased by 3.4%, the modal frequency is increased by 1.8%; the longitudinal reinforcement ratio is from 1.772% to 2.657%, the ultrasonic sound velocity is increased by 3.5%, and the modal frequency is increased 4.1%; the reinforcement can improve the ultrasonic sound velocity and the natural vibration frequency of the concrete to a certain extent, the change of the reinforcement ratio causes the same regular change of the sound velocity and the modal frequency.
Synthesis of Fe3O4-based Magnetic Nanocomposites and Application in Pesticide Residue Detection
Authors: Dong RongRong , Yang ChunLiang , Lin LinYun 
Published: December 2019

Abstract
Magnetic nanomaterials are a new kind of nanomaterials with great potential application value. Recently, there have been many reports about the combination of magnetic nanomaterials and agricultural residue detection technology to establish a new detection method. Due to the special super paramagnetic, the large number of surface active sites, easy separation and recovery, the Fe3O4 magnetic nanocomposite material is commonly used in complex sample pretreatment on extraction and enrichment of the target compounds. By combining with the target substance in complex sample matrix and under the action of external magnetic field, the material can quickly, simply and efficiently enrich and extract trace substances in the sample. This paper mainly introduces the application of Fe3O4-based magnetic nanocomposites in the detection of pesticides and the main preparation methods of Fe3O4-based magnetic nanocomposites, including coprecipitation, microemulsion, photothermal chemistry and ultrasonic decomposition, hydrothermal reaction and sol-gel method.
AIE-active positional isomers based on tetraphenylethylene attaching o-/m-/p-formylphenyl groups for reversible mechanochromism
Authors: Shan-Ni Shan , Jiang Lixian , Li Jie , Li Yiheng , Zeng Yan , Wang Jin-Liang , Lv Guiqin 
Published: December 2019

Abstract
Three AIE-active positional isomers, TPE-4(Ph-o-CHO), TPE-4(Ph-m-CHO) and TPE-4(Ph-p-CHO), which are tetraphenylethylene (TPE) derivates peripherally attaching ortho-/meta-/para-formyl phenyl groups, were designed and synthesized. The formyl substitution position caused different intramolecular charge transfer (ICT) of the isomers, which can effectively modulate their photophysical properties and mechanochromism. TPE-4(Ph-o-CHO), TPE-4(Ph-m-CHO) and TPE-4(Ph-p-CHO) exhibited remarkable aggregation-induced emission (AIE) characteristics. Moreover, TPE-4(Ph-o-CHO), TPE-4(Ph-m-CHO) and TPE-4(Ph-p-CHO) possessed mechanochromic property, which displayed distinguished color changes. Thus, three isomers are potential to be applied in mechano-response sensors or optical storage materials.
Study on Properties of New Mg-Y-Nd-(La+Ce)-Zr Degradable Magnesium Alloy
Authors: Zhang Jiang , Dai Yuelai 
Published: December 2019

Abstract
The new Mg-Y-Nd -(La+Ce) -Zr magnesium alloy was taken as the research object to study the types and contents of rare earth alloys. The corrosion properties were studied by scanning electron microscope and electrochemical experiments. The results showed that the new Mg - Y - Nd - (La + Ce) - Zr magnesium alloy had no toxicity to human cells and had ideal corrosion resistance. The mean corrosion rate at 96 h was <0.3mg/(cm2h). The mechanical properties test showed that the new magnesium alloys had good mechanical properties, its tensile strength >220Mpa, elongation >20%.
Study of Corn Stover Particle Size Distribution Characteristics for Knife Mill and Hammer Mill
Authors: Su Dongping , Yu Manlu 
Published: December 2019

Abstract
Corn stover is a major agricultural biomass feedstock. The particle size distribution (PSD) of ground corn stover is important for biomass to bioenergy conversion. The objectives of this study were to evaluate Rosin-Rammler (RR) distribution, normal distribution and lognormal distribution on analysing PSD of corn stover grinded by knife mill and hammer mill, and to compare the grinding performance for knife mill and hammer mill. RR distribution model provided the best fitting results (0.998⩽Adj.R
2⩽1) to the ground corn stover among the three PSD distribution models. The grinding performance based on the characteristic parameters (geometric mean diameter, geometric standard deviation, RR distribution parameter) analysis for the knife mill is better than the hammer mill for grinding corn stover under the same conditions.
System design and analysis on organic Rankin cycle for asphalt plant’s waste heat recovery
Authors: Bai Jie , Cao Leilei , Cao Lulu 
Published: December 2019

Abstract
An organic Rankin cycle system was investigated with the purpose of utilizing the waste heat from the asphalt plant’s rotary dryer. The factors that have the impact on the heat source properties by means of combustion and heat transfer were discussed. The ORC system was developed utilizing R245fa as the working fluid, in consideration of the operation conditions of the cycle and its environmentally-friendly characteristics. An evaporator which support phase-change heat transfer was chosen, because most of the energy is in latent heat of the vapour. A radial inflow turbine was selected due to the output power of the system. The operation data of the asphalt plant was taken to evaluate its potential of energy recovery. It can generate 104.4kW electricity when the ORC system is combined with JD3000 asphalt plant. If the electricity is used to the plant itself, 17.1% of electricity power could be saved. The scheme proposed could provide a new solution to the waste heat recovery of the asphalt plant.
Indirect Determination of Penicillamine using Fe(II)-Phenanthroline Spectrophotometry
Authors: Wen Xinrong , Tu Changqing 
Published: December 2019

Abstract
Fe3+ can react with penicillamine to form Fe2+, the amount of Fe2+ is directly proportional to the addition of penicillamine in system, and then Fe2+ reacted with the chromogenic reagent of phenanthroline to form a stable complex which its maximum absorption wavelength is 511nm. The content of penicillamine is determinated by measuring the absorbance of the stable orange red complex. The method for the indirect determination of penicillamine using Fe(II)-phenanthroline spectrophotometry has been established. The method is used to the determination of penicillamine in tablets, and the results are satisfactory.
Quantitative Detection of Fe3+and F-based on the Fluorescence “OFF-ON” of Quinine Sulfate
Authors: Xie Peng , Tian Liang , Zhang Jianhui , Li Ting , Xiang Canhui 
Published: December 2019

AbstractIn this experiment, a method for continuous detection of Fe3+and F-based on the fluorescence “OFF-ON” of quinine sulfate was designed. Through the addition of Fe3+, the fluorescence spectrum of quinine sulfate appeared “OFF”. Then, when F-was added, the fluorescence appeared “ON” again. By this method, we can get the quantitative detection of Fe3+and F-continuously. The detection limit of Fe3+is 1.0×10-5mol/L and the linear range is 4×10-5mol/L-8×10-4mol/L. The detection limit of F-is 4.4×10-5mol/L and the linear range is 1.2×10-4mol/L-2.4×10-3mol/L.
Comparative Study on the Fingerprint of Asparagi Radix by HPLC
Authors: Yang Xiaosong , Huang Xulong , Li Xiaofen , Feng Hua , Kong Juan , Wang Xiangpei , Wu Hongmei 
Published: December 2019

Abstract
Objective: Asparagi Radix is a commonly used herbal material in Traditional Chinese Medicine. A positive phase liquid chromatography fingerprints method was developed to compare the differences between Asparagi Radix and its decoction pieces and counterfeits. Methods: The chromatographic separation was performed on a GOLD HILIC column (250 mm × 4.6 mm, 5 μm) with a gradient elution program using a mixture of acetonitrile and 0.01% phosphoric acid water as mobile phase at 220 nm wavelength, the flow rate was 0.8mL/min and the column temperature was 30°C. Results: The fingerprints of Asparagi Radix from different sources and its decoction pieces and counterfeits were determined by HPLC, and the similarity was analyzed. Eight common peaks were identified of 5 batches of Asparagi Radix from different origins, with similarity of 0.503-0.812. One common peak was identified by fingerprints of 5 batches of Asparagi Radix and 9 batches of its decoction pieces, with similarity of 0.407-0.766. Five batches of Asparagi Radix and two batches of its counterfeit were identified three common peaks, the similarity was 0.511-0.727. Three common peaks were identified by fingerprint of 9 batches of Asparagi Radix decoction pieces, with similarity of 0.507-0.793. Conclusion: By comparing the similarity of different origins of Asparagi Radix, the similarity of Asparagi Radix and its decoction pieces, the similarity of Asparagi Radix and its counterfeits, it was found that the common chemical compounds of Asparagi Radix was less, and the difference was more significant. The results indicated that the developed method could be reflect the differences in chemical composition among different sources of Asparagi Radix, its decoction pieces and its counterfeits, and served for the quality identification.
Hydraulic power plant pressure vessel manhole fillet weld hidden trouble investigation
Authors: Li Wenbo , Liu Lanlan , Zhang Jun , Chen Junjun , Xie Yi , Sun Lipeng 
Published: December 2019

Abstract
As an important part of the power station, the pressure vessel plays a key role in the normal operation of the power system. However, as pressure vessel itself is a kind of equipment with high risk, if the power station does not carry out strict safety management, it is easy to cause serious safety accidents in the normal operation of power vessel, resulting in irreparable heavy losses. However, in terms of the current situation of the safety technical management of pressure vessels in most power stations in China, there are still many problems and deficiencies. Even some power stations do not realize the importance of this problem, which leads to certain potential safety problems of pressure vessels. Through this paper, the author shares many years of experience in the testing of pressure vessels in hydropower plants, as well as relevant measures to deal with hidden dangers.
Simplified analysis method considering shear-lag effect of steel-concrete composite decks
Authors: Xu Huitong , Gu Jinzhu , Ma Qi , Li Xuan , Zhao Xu 
Published: December 2019

Abstract
In the wide-plate steel-concrete composite decks, concrete slab and the flange of steel box girder will have obvious warping deformation under the influence of steel beam webs. This mechanical behavior is called the shear lag effect and is usually obtained by utilizing the effective width. Therefore, a simplified calculation method based on effective width is proposed to analyze the shear lag effect of composite bridge decks, which would greatly improve the process of the design analysis in the general beam element model. In this study, the static load test of composite twin I-girder deck and box-girder deck specimens is carried out. In the experiment, two specimens were subjected to vertical bending load and axial compression load. In addition, a finite element model is established to analyze the shear lag effect of composite sections. Through the analysis of the fine element model of the composite deck under vertical bending load and axial compression load, the longitudinal distribution characteristics of the effective width are obtained. Moreover, the effective width prediction formulae are proposed. Finally, based on the general beam element model, considering gravity load, traffic load envelope and prestressing load, the simplified analysis method of composite decks for the design process is performed by comparative analysis.
Structural Analysis on Extra-High Voltage Engineering’s Pressure Factors
Authors: Ni Hui-jun , Zhi-shuang  , Zhou Chang-chao 
Published: December 2019

Abstract
From view point of building Extra-High Voltage Engineering, the paper discusses the key pressure factors on carry out engineers. The field research from grid enterprises shows that craftsmen, artisans and mechanics all can significantly affect project quality and project delivery time. This research provides useful tools for Extra-High Voltage Engineering’s implement and management through the power of the key pressure factors by enterprise’ examples of craftsmen.
Test study on the load transfer behavior of the composite foundation of pipe-pile with cap & holes
Authors: Zou Yongqiang , Lei Jinbo , Zhou Xing , Yang Jinyou 
Published: December 2019

Abstract
As the vertical reinforcement of composite foundation, the concrete pipe pile is suitable for the treatment of deep soft foundation engineering. In order to explore the working characteristics of the composite foundation of pipe-pile with cap & holes, the model tests have been carried out between the composite foundation of pipe-pile with cap & non-hole and the composite foundation of pipe-pile with cap & holes, which are three arrangements of holes. The working properties of settlement deformation, load transfer and the pile-soil stress ratio of the composite foundation of all piles have been analyzed. The test results show that: (1) the total settlement of composite foundation of pipe pile with cap & holes is smaller than that of the composite foundation of pipe pile with cap & non-holes, and its settlement curve is relatively gentle.(2)The pile axial force and the pile-soil stress ratio of the composite foundation of pipe-pile with holes is slightly less than that of pipe-pile. (3)The pile side frictional resistance and the soil pressure between two pile caps of the pipe-pile with holes is greater than the pipe-pile with cap & non-holes composite foundation.
Exploring the influence of project manager leadership on the success of green building——Based on multi-group structural equation model
Authors: Liu Jinjian , Sang Peidong , Zheng Lingqiao 
Published: December 2019

Abstract
The project manager’s leadership is a key to the success of construction project. With the further worsening of environmental and energy problems, the development of green building has become an inevitable trend. There are little studies on project manager leadership evaluation based on green building project. Through literature review and group discussion, the key success indicators, project manager leadership style and 14 leadership indicators were determined. The hypothesis test was verified by questionnaire survey and multi-group structural equation model. The results provide a theoretical basis for selecting excellent project managers for green building projects.
Effect of Shield Tunnel Construction on Surface Deformation in Changzhou
Authors: Li Xiongwei , Ju Shangwei , Wang Yuezhong , He Liang 
Published: December 2019

Abstract
The test section of Changzhou North Railway Station of Rail Transit Line 1 is taken as the engineering background. It is before the shield tunnel passes through the Beijing-Shanghai high-speed railway. With software of PLAXIS 3D, the numerical simulation on surface deformation is conducted considering the influence of shield tunnelling, based on the M-C. HS and HSS model. The calculated results of the three models are compared with the monitoring data. It is shown that the HSS model is optimal. In addition, the applicability of 0.5% and 0.8% for the loss rate of shield tunnelling in Changzhou is studied. It is reasonable to adopt 0.5% stratum loss rate for general shield tunnel conditions. But, sometimes in order to consider the special conditions such as deviation rectification construction, stratum loss rate should be set at 0.8%.
Research on Gentle Slope Design Index of Continuous Downhill Slope Section of Mountainous Highway
Authors: Zhao Yifei , Ding Jiahui 
Published: December 2019

Abstract
In order to ensure the safe driving of heavy trucks, the mountainous highways have stipulated the average longitudinal slope and slope length of continuous downhill slopes. For the continuous downhill sections, the necessity of gentle slopes exists, and it is proposed to meet the average longitudinal slope conditions. The gentle slope and slope length index have certain guiding significance for the design of the longitudinal section of continuous downhill section controlled by the average longitudinal slope index. In this paper, the relationship between the running speed characteristics of the downhill truck and the slope of the vertical slope and the traffic accident rate are analyzed. The FAW Jiefang J7 tractor CA4250P77K25T1E5 with the total weight of 48.805t and the power quality ratio of 7.58kw/t is selected as the leading model, based on the downhill slope. Reduce the speed, combined with the braking performance curve of the slow-slope section of the dominant model, the research shows the design index of the downhill gentle slope.
The Adaptability of Passive Design Strategies for Public Buildings in Shenzhen
Authors: Liu Lei , Li Shenghan 
Published: December 2019

Abstract
In recent years, with increasing demands of improving public indoor environment for living in a more comfortable manner, a large number of mechanical equipment are applied to public buildings, making public buildings be major energy consumers in civil buildings. Passive technology is an effective way to design buildings of energy saving strategies. Therefore, this paper summarizes the overall energy consumption of public buildings in Shenzhen by collecting and analyzing statistical data through Shenzhen Statistical Yearbook over the years. Besides, using Ecotect’s sub-software “Weather tool” to analyze the local meteorological environment. Through the analysis of the psychrometric chart to get the different energy-saving potential used the specific six passive design strategies, the results have shown that the best combination of passive design strategies suitable for climate conditions are natural ventilation, passive solar heating, and thermal heating. Finally, these three passive design strategies are further analyzed and discussed to obtain the feasible schemes, which could provide constructive suggestions for passive energy-saving design of public buildings in Shenzhen.
Analysis of bending failure process of RPC100 foot-slabs
Authors: Zheng Weilong , Yuan Shengtao , Hu Chuanwen , Luo Wenbo , Xie Shoufu , Chen Shunchao 
Published: December 2019

Abstract
In order to study the failure modes of RPC100 foot-slabs, three pavement plates with the same calculated span were used for the uniaxial bending experiment. Meanwhile, the failure process of three groups of ordinary reinforced concrete was compared. The test showed that: during the experiment, the failure process of the two was basically the same, and RPC100 showed a certain ductility. So RPC100 foot-slabs was a plastic material.
Comparative test and analysis on flexural behavior of RPC100 foot-slabs
Authors: Zheng Weilong , Yuan Shengtao , Hu Chuanwen , Luo Wenbo , Xie Shoufu , Chen Shunchao 
Published: December 2019

Abstract
In order to judge normal service condition of RPC100 foot-slabs, and study its application value in practical engineering. In this paper, the crack bending moment of RPC100 and ordinary reinforced concrete is compared by using the test method of hydraulic jack single point centralized loading simply supported plate, which combines with the test data of macroscopic observation, deflection and strain. The results show that the safety coefficient of RPC100 furrow cover applied to the pavement is greater than 1.8, which is in a safe state and can meet the demand for carrying capacity of the sidewalk in normal use.
Visualization Analysis of BIM Research Hotspot and Evolutional Trend
Authors: Liu Yanqi , Liu Xinnan , Zhao Likun 
Published: December 2019

Abstract
Building Information Modeling (BIM) has gained rapid development and received broad worldwide attention among researchers and architects. To grasp the research progress of BIM is of great significance for researchers and enterprises engaged in BIM related studies and plotted a science knowledge map by with the visualization tool CiteSpace, and used biliometric analysis to compare BIM studies published from 2008 to 2018 in China and abroad from three perspectives: knowledge base, research hotspot and evolutional trend. The research result shows that BIM studies abroad focus on interdisciplinary fields, but Chinese BIM studies focus more on application of BIM technologies in actual projects. Research on integration of BIM with Internet, big data, cloud computing and other information technologies is bound to become a new research trend of BIM in China.