bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Modeling and Simulation for Power Financial Transactions in Recent Chinese Power Market
Authors: Fan Menghua , Zhao Zheng 
Published: December 2019

Abstract
At present, the pace of power market construction in China is accelerating. The policy system and market rules are constantly improving. The market system combining medium and long-term with spot market has been gradually established. The power market trading volume has reached a certain scale, and the reform dividend is released. As of the end of June 2019, eight provincial spot market pilot projects have fully started the simulation and test run. With the gradual improvement of various physical electricity trading mechanisms, the types of transactions in China’s electricity market will extend from the electricity market, auxiliary services market to futures, options, financial transmission rights and other financial derivatives trading markets. In view of the types of electricity financial transactions that have been carried out in China, simulation models are established in this paper and empirical analysis is conducted, which can provide references for further deepening the construction of China’s electricity market.
Research on the design and mechanical properties of new modular building joints
Authors: Wang Yongrui , Xia Junwu , Xu Bo , Ma Renwei 
Published: December 2019

Abstract
The key link of modular construction is to connect modules into a whole through the modular joints. Study shows that the modular structure from module between joints mostly happens to break, and modules joint will determine the bearing capacity of the whole building. Besides, the highlight and the meaning of the modular construction are to quickly build, and modular joint structure determines the construction speed. So modular joints play a very important part in the modular construction. At present, most of modular joints have some shortcomings. It is difficult to meet the construction installation requirements of modular building. So it has great significance to invent a joint which can achieve the fast construction aim, has reasonable construction method and has enough bearing capacity. A new type of modular joint is proposed in this paper, which meets all kinds of requirements of modular construction. The finite element analysis is used to analyze the stress nephogram and the moment-rotation curve to research its mechanical performance under five conditions. The results show that the new type of joint has a certain bearing capacity in each working condition.
Preparation and Properties of Anti-mud and Viscosity-Reducing polycarboxylate superplasticizer
Authors: Du Kelu , Hou Huanhuan , Liu Zunyu , Li Xianghe , Wen Qingru 
Published: December 2019

Abstract
In this paper, the electropositive amide and phosphoric acid functional groups are introduced on the basis of the synthesis of common polycarboxylate superplasticizer, so as to reduce the sensitivity of the polycarboxylate superplasticizer to clay. In this paper, a small amount of 2-Capped1-Phoshate Easter containing olefin functional group was introduced into the polycarboxylate superplasticizer molecule by free radical reaction, which improved the negative electricity of the polycarboxylate superplasticizer and reduced sensitivity to clay. The performance test results show that the product can effectively reduce the sensitivity to clay during the process of mixing concrete with sandstone material with high mudstone content, and improve the fluidity of concrete and effectively reduce the viscosity of concrete.
Analysis of Boron on microstructure and composition of IC10 superalloy
Authors: Qi li , Xiong Ming , Liu FengMei , Yue Xiong , Yaoyong Yi 
Published: December 2019

Abstract
The microstructure and composition of IC10 superalloy containing B (0 wt% 1.1 wt%) were studied in this paper. DSC and microstructure analysis were used to compare the formation process of the microstructure and composition of the IC10 alloy with or without boron content. Precipitation temperatures and sequence of initial phases of IC10 alloys with or without B content were researched. The results shows that the exothermal peaks of formation for γ, MC carbide, (γ+γ’) eutectic and secondary γ’ phase reveal on DSC cooling curves. The alloys with 1.1% B have amephase component and the formation sequence of six phasesis γ, MC, (γ+γ’) eutectic, secondary γ’, M3B2 and Ni5Hf in turn. The boron content enhances the volume fraction of M3B2 and (γ+γ’) eutectic, decreases the temperature of liquids and solidus and also delays the formation of MC and (γ+γ’) eutectic obviously.
Effect of cornstalk ash on the microstructure of cement-based material under sulfate attack
Authors: Li Qinfei , Zhao Yao , Chen Heng , Hou Pengkun , Cheng Xin 
Published: December 2019

Abstract
Cornstalk ash is one of the most abundant, renewable and green supplementary cementitious materials, which is an effective approach to decrease the amount of cement in concrete structures for reducing CO2 emission. In this paper, the influence of mechanical properties and microstructure of the mortar with different proportion of corn stalk ash under sulfate attack are investigated, and it can provide necessary theoretical basis and practical guiding significance for practical engineering. A series of measurements are used to characterize the effect of the corn straw ash of cement hydration products, such as XRD, hydration heat and SEM. It is concluded that corn stalk ash can partly replace cement without reducing the compressive strength and enhance the compressive strength under sulfate attack, the data of TG shows that the content of the calcium dioxide is obviously decreased with corn straw ash.
The transparent Schottky junction of reduced graphene oxide/SnO2 nanoarrays towards enhanced broadband photoresponse
Authors: Li Shi , Pan Jiaqi , Yu Qi , Wang Peipei , Chaorong Li 
Published: December 2019

Abstract
The rGO/SnO2 nanoarrays (rGO/SnO2 NAs) Schottky junction is synthesized by a series of RF magnetron sputtering, hydrothermal and electrochemical deposition. The unique transparent junction exhibits the broadband photoelectric responses from the ultraviolet to visible light. As shown, the proper rGO/SnO2 NAs display highly transparency of about ~60% and dramatically enhance photoelectric conversion of about ∼100 times than that of the initial Schottky junction. Finally, the mechanism of the Schottky junction is investigated.
Two dimensional Z-scheme AgCl/Ag/MnTiO3 nano-heterojunctions for photocatalytic degradation performance enhancement
Authors: Liu Yanyan , Pan Jiaqi , Ou Wei , Wang Panhong , Chen Zhanfen , Chaorong Li 
Published: December 2019

Abstract
The AgCl/Ag/MnTiO3 heterojunction was synthesized by two steps, the MnTiO3 nanowires were first prepared by electrospinning, and then Ag/AgCl was loaded onto MnTiO3 by photodeposition. It can be seen that the AgCl/Ag/MnTiO3 heterojunction is successfully synthesized and proved by XPS and SEM. The absorption band of the AgCl/Ag/MnTiO3 heterojunction exhibits a red shift indicating an increase absorption in sunlight. Compared with pure MnTiO3, the AgCl/Ag/MnTiO3 heterojunction exhibits a better photocatalytic degradation rate of about 8 times, which is attributed to the AgCl/Ag could accelerate the transfer of photogenerated electrons and promote separation of electron-holes efficiently.
Mechanical Effect Analysis of Joint Surface of Rock with Different Roughness
Authors: Ke Changren , Lei Xinlin , Liu Zhuojun 
Published: December 2019

Abstract
Using the same material to make test blocks with different undulating angles for straight cutting test, the correlation between peak strength and residual strength values and the undulating angle and deformation characteristics of the section surface is studied, the residual strength criteria obtained fit with the existing strength criteria, the use of matrix calculation method, parameter correction, and the revised strength criterion.
Ring-shear Test and Constitutive Model of Surfaces between Clay in Nanchang Area and Different Roughness Contact
Authors: Liang Haian , Chen Haikang , Hu Qingbo , Zhang Longpeng , Liu Chao 
Published: December 2019

Abstract
The shear failure characteristics of soil-structure planes are the internal mechanism of slip deformation of foundation structures and strata, and it is an inevitable and important problem in engineering. In this paper, the shear tests of silty clay and structural planes with different roughness in Nanchang area are carried out by using the modified shear apparatus, and the statistical piecewise constitutive model of shear damage based on Weibull distribution is established. The results show that the shear stress-shear displacement curves of contact surfaces with different roughness exhibit strain hardening and strain softening phenomena; the peak shear strength and the final residual strength of the contact surface increase with the enhancement of the roughness of the contact surface and the normal stress applied on the contact surface; the statistical piecewise constitutive model of shear damage based on Weibull distribution achieves the elastic-plastic properties of the contact surface well. The strain softening phenomena at the deformation stage after the peak value is in good agreement with the experimental curves.
Experimental study on Bijie Cement Improved Red-Clay
Authors: Fang Juan , Gan Hongjiang , Zhu Jiaai , Liu Chunlian 
Published: December 2019

Abstract
As there was a large amount of red clay distributed in Bijie, which is used as the foundation of building and roadbed. To study the improvement effect of cement content on the Bijie red-clay, the typical red clay in Bijie was firstly sampled and the basic physical property indexes were tested. Then, the samples with different cement ratio were made and the unconfined compressive strength test was carried out. The results indicate that the strength of cement red-clay was increasing with the cement ratio increasing, and the improved effect is obviously, but the variation curve is not linear. The peak strength appeared when the cement ratio is 10%, after that ratio, the strength was decreasing with the increase of cement ratio. The reason is that the incorporation with cement makes Bijie red-clay harden because of the hardening cement.
Displacement Prediction Model for Concrete Dam Based on PSO-GBDT
Authors: Jun Zhang , Jian Mo , Jiemin Xie , Zuohong Meng 
Published: December 2019

Abstract
Displacement plays a vital role in concrete dam safety monitoring data. It is affected by a multitude of factors such as water pressure, temperature, structure stiffness, and bottom bedrock settlement. A displacement prediction model based on gradient boosting decision tree (GBDT) is proposed to make accurate predictions. Meanwhile, particle swarm optimization (PSO) algorithm is used to optimize the model parameters, including learning rate, the trees’number, the maximum optional variables, and the maximum depth of each tree. Finally, a real-world radial displacement dataset is used to compare the performance of the PSO-GBDT model, the multiple linear regression model (MLR), and the stepwise regression model (SR). The results indicate that the PSO-GBDT model achieves the best performance. Moreover, the model can also analyse the importance of each variable, which has substantial practical value.
Study on Design Method of Cold-formed Steel Beam with No Axis of Symmetry Section
Authors: Guo Penggang , Chen Xiangrong , Zhang Qingyu , Zhang Pingping 
Published: December 2019

Abstract
The paper mainly describes the detailed study resulted on bending carrying capacity of two kinds of cold-formedsteel beam with abroach and asymmetric section. This paper has completed 9 groups tests of torsion bending, and totally 12 specimen based on the current theory, deducing the critical moment of asymmetric section under lateral loading, providing the formula of coefficient of integral stability, and compared with tests results determined the simplified formula for engineering design.
Analysis of heat treatment defect of load-bearing metal parts of high voltage circuit breaker mechanism
Authors: Feng Chao , Xie Yi , Wang Jun , Long Yi , Li Dengke , Liu Weike , Ouyang Kejian 
Published: December 2019

Abstract
Failure analysis was carried out on the circuit breaker gear damaged in operation. Various detection methods were applied including composition analysis, hardness testing, metallographic observation, fracture scanning analysis and so on. The failure reason was found out to be improper heat treatment process, and corresponding rectification opinions were also put forward.
The study on material defects of structural parts of circuit breaker
Authors: Feng Chao , Xie Yi , Wang Jun , Long Yi , Li Dengke , Liu Weike , Ouyang Kejian 
Published: December 2019

Abstract
The fault of circuit breaker is caused by the defect of metal material. A series of tests including design drawings, physical and chemical tests, composition tests and metallographic observation, have been carried out for the failed springs. The experimental results showed that the failure of energy storage springs was caused by combination of design flaws and improper heat treatment process. At the same time, the corresponding noteworthy key points in the process of material production were put forward.
Fenton-like Prussian Blue Coated Magnetic Hollow Fe3O4 Nanocomposites for Dye Removal
Authors: Shi Weilu , Li Jinghua , Li Xiaonan , Tian Siqi , Zhao Yan , Li Guangda 
Published: December 2019

Abstract
In this work, Prussian blue (PB) coated magnetic hollow Fe3O4 nanoparticles (PB@Fe3O4NPs) were fabricated to degrade two modal dyes in wastewater via a typical peroxidation. Typically, the as-prepared PB@Fe3O4NPs were found to present intrinsic Fenton-like catalytic capacity and could catalyze the modal peroxidatic reaction for dyes degradation. Meanwhile, the obtained PB@Fe3O4NPs could be easily separated from the reaction solution by an external magnet since the magnetic Fe3O4 core for cyclic utilization. The relative removal efficiency of the PB@Fe3O4NPs was still above 80% after 10 cycles, which showing excellent recycling performance.
The Investigation of Corrosion Property of The Four Coatings in The Transformer Substation Soil
Authors: Xu Song , Wan Tao , Zhou Kai-bin , He Zhi-qiang , Huang Hai-bo , Huang Ying , Zhou Ting , Mao Wen-qi , Wu Jie-jun , Wei Jia-qiang , Gong Shang-kun , Liu Kai 
Published: December 2019

Abstract
Pure Al coating, AlSi alloy coating, NiAl alloy coating and 316L stainless steel coating were prepared on the Q235 steel by arc spraying technology. The corrosion of the four sprayed alloy coatings in the 220kV transformer substation soil and soil solution was studied by buried specimens and electrochemical test in Hunan. The corrosion behaviors of the coating steel samples in transformer substation soil solution were investigated by line polarization, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests. The results show that the best corrosion resistance of the four sprayed alloy coatings was AlSi coating, sequentially in the order of NiA1 and stainless steel coating, and the Al coating was easy bouffant at long time in the underground, so that the corrosion resistance is not good.
Analysis on coordinated development of prefabricated construction industry, regional economy and ecological environment——taking Beijing-Tianjin-Hebei region as an example
Authors: Qianqian Li , Zhaohui Duan , Likun Zhao , Yingbo Ji 
Published: December 2019

Abstract
Taking eleven prefecture-level cities including Beijing, Tianjin and Hebei as research objects, this paper established an evaluation system for coordinated development of the prefabricated construction industry, regional economy and the environment. Additionally, the weighting TOPSIS method was adopted to assess the overall development level of three major systems in this region and the evolving relation of coupled coordination for three systems in provinces and cities of Beijing-Tianjin-Hebei region was analyzed from time and space dimensions based on the coupled coordination model. The results show that prefabricated construction industry and regional economies in Beijing-Tianjin-Hebei region have relative relevance, but there is no significant conflict between economy development and ecological environment. From time, it is found that coupled coordination degree of three major systems keeps stable and rises with fluctuation and the main restriction factors of coupling development in each province and city are different.
Dynamic Correlation Analysis of Construction Industry Development Level and Science and Technology Innovation
Authors: Wang Qin , Qi Yuan 
Published: December 2019

Abstract
This paper analyzes the relationship between the technological innovation of the construction industry and the development level of the construction industry from the perspective of input and output in the construction industry. Using the time series data from 1995-2017, a vector autoregressive (VAR) model was established. The article uses co-integration analysis, Granger causality test, impulse response function and variance decomposition method to study the index variables. The long-term equilibrium relationship and short-term fluctuation effects between China’s construction industry development, construction industry science and technology innovation investment and output are analyzed. The results show: there are long-term equilibrium relationships and one-way causal relationships between the three variables, and there is time lag. The output of science and technology innovation in the construction industry is positively responded to itself, the development level of the construction industry and the investment in science and technology innovation in the construction industry. Among them, it is most affected by the fluctuation of investment in science and technology innovation. Compared with the development level of the construction industry, the contribution of scientific and technological innovation to the output of scientific and technological innovation is even greater. Finally, relevant policy recommendations for the development of the construction industry and technological innovation in the construction industry are given.
Numerical Simulations of Seismic Responses of Concrete Segments for Tunnel Linings in Shenyang City
Authors: Yu He , Li Shouju 
Published: December 2019

Abstract
In order to evaluate the influence of seismic action on internal forces on segments, the seismic responses of concrete segments for tunnel linings in Shenyang city are numerically simulated with finite element method. The seismic inputs acting on bottom of FEM model are modified in order to make peak value of accelerations on ground surface equal to 1m/s2 based on code for seismic design of buildings. The investigations show that, by comparing with those of the seismic inputs on bottom of FEM model, the predominant frequency of ground surface movements is significantly modified because the soil has an important filtering effect. By comparing with the peak value of accelerations of seismic inputs on bottom of FEM model, the peak value of accelerations on ground surface is only amplified as 1.57 times because the elastic moduli in different soil layer have little different. The maximum bending moments on segment linings induced by static soil loading are 496kN·m. The maximum bending moments on segment linings induced by seismic loading are 58kN·m. The maximum bending moments on segment linings induced by static soil loading are located in roof, floor and two side walls. However, the maximum bending moments on segment linings induced by seismic loadings are located in left and right spandrels. On those sites, the bending moments induced by static loading approaches zero. By comparing with the maximum bending moment on segment linings induced by static soil pressure, the maximum bending moment superposed by static and dynamic loadings only increases 0.4%.
Research on Reasonable Spacing of Adjacent Highway Plane Intersections
Authors: Peng Yuhua , Ye Ying , Wu Xuezhu 
Published: December 2019

Abstract
In China’s relevant specifications, the minimum spacing of plane intersections is simply defined according to the grade of highway, and the design speed of intersections and the influence of intersection geometry are not considered. In this paper, the traffic flow characteristics of road sections, the influencing factors of the intersection of road intersections and the sections between plane intersections are divided into entry points. The intersection functional zone and the length of smooth running zone are theoretically analysed. According to the influence of factors, the length of each segment is calculated separately, and the reasonable spacing index of the intersection is proposed.
Research and Practice of Mass Concrete Foundation Project Design of Modong No.4 Bridge
Authors: Chen Junxiang , Deng Nianchun 
Published: December 2019

Abstract
Modong No.4 Bridge is an important part of the water environment improvement project in Guangxi Laibin City, Guangxi. Its site conditions are extremely complex. After extensive research and demonstration, considering safety, practicality, economy, beauty and environmental protection, the design proposal was put forward according to local conditions. Abutment foundation uses ultra-high rigidity to expand deep foundation, which makes foundation pit construction extremely difficult. In order to achieve the optimal implementation of the recommended scheme of the bridge, the key technologies and quality control points of mass concrete foundation construction are studied and put forward. The feasibility of the design scheme is improved to the greatest extent, providing an effective reference for similar bridge construction.
Unconfined Deformation Characteristics of Collapsed Soil Based on Close-range Photogrammetry Technology
Authors: Lili Zhu , Xiaoming Zhang 
Published: December 2019

Abstract
Benggang is a special type of landform type that exists in the hilly areas of tropical and subtropical hills in the south of China. The water and soil erosion occurring on the collapsed land is different from other types of erosion. Its occurrence and development are characterized by uncertainty and rapidity, which seriously threaten the ecological environment and human settlement security. The intrinsic geotechnical characteristics of the soil are a major factor affecting its formation and development. The unconfined compressive test plays an important part in the study of the mechanical properties and failure modes of the soil in the collapsing region. The near-sight measurement technique is now used for the unconstrained resistance. The lateral deformation of the soil samples in the pressure test was sampled and the image information was digitized using matlab. The deformation of the soil with different mechanical properties was analyzed by the displacement information of the marked points and the overall contour deformation and other information. Results showed that in the unconfined compressive strength test, there was no significant difference in the overall deformation of the different soil samples. In one sample, there were significant differences in the displacement of different markers. The close-range photogrammetry technique can well compensate for the lack of the unconfined compression test and it also has a broad space for development in the field of soil and water conservation.