bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Simulation Analysis of Supporting Stability of Cast-in-place Piles in Pipe Jacking
Authors: Liu Zengwei , Zhou Aizhao , Hu Yuan , Sui Xiaolan , Liu Qing
Published: June 2019

Combined with the support excavation and pipe jacking construction of the pipe jacking working well in a section of Zhenjiang sponge city plan construction, the three-dimensional numerical analysis model was established by MIDAS-GTS, and the deformation of the supporting structure at each construction stage was analyzed. The conclusions are as follows: when the three-dimensional numerical analysis model is established, the deformation of the beam element is closer to the real situation than that of the plate element beam element; in the process of pipe jacking construction, the displacement of the supporting structure is opposite to that of the jacking direction after the Jack loads, and the displacement trend changes linearly with the magnitude of the Jack force. in the process of pipe jacking construction, the maximum displacement of the supporting pile occurs at the break of the supporting pile at the exit of the pipe jacking machine. the deformation of the supporting pile can be effectively reduced by strengthening the soil in a certain range of the opening of the pipe jacking. Through the simulation analysis of excavation support and subsequent pipe-jacking construction with concrete cast-in-place pile, the results can provide a reference for the design of supporting structure and the control of surface subsidence and deformation during construction.
Research and Analysis of Library Access Control Authentication Scheme Based on IPv6 and Location Technology
Authors: Li Panfeng , Wei Jiangshu , Zhang Di , Hu Lin , Hu Qiyao
Published: June 2019

With the maturity of IPv6 technology, smart campus has become a trend, and the management of libraries will inevitably become intelligent. Nowadays, libraries in many colleges and universities use the method of swiping for identity authentication, which has great drawbacks. In order to solve the defects of traditional access control technology, this paper proposes a library access control authentication scheme based on IPv6 and location technology: this scheme realizes identity authentication through IPv6 wireless local area network and WIFI positioning technology, effectively avoiding a series of authentication problems.
AES Algorithm Optimization and FPGA Implementation
Authors: Liu Yufeng , Xu Xiangyang , Su Hao
Published: June 2019

AES is an existing encryption algorithm with strong anti-attack capability, fast encryption speed and good portability. Implementing AES algorithms on FPGA can process data faster. In order to improve the running speed of the overall system, the re-design uses a full-flow technology to implement the algorithm. And the algorithm is optimized,finally using quartus for synthesis.
Nonlinear Simulation Analysis of the Shear Force Redistribution Performance of the RC Frame-Shear Wall Structure with Different Seismic Performance Targets*
Authors: Ao Juming , Jia Yigang , Wu Guangyu , Wu Guoqiang , Wang Huibin
Published: June 2019

Seismic performance design has become the basic requirement of tall building structures design, and the research on the impact of seismic performance target on the anti-side mechanism of RC frame-shear wall structure first and second anti-seismic defense lines is rarely involved. In this paper, the nonlinear finite element analysis method of degenerated three-dimensional solid virtual laminated element is adopted to consider the space synergy effect of beam-slab-column wall, and the nonlinearity of the 17-story RC frame-shear wall space structure model is designed according to seismic performance targets B, C and D respectively.
Experimental study on compressive properties of steel fibre concrete
Authors: Liu Yanjie , Ding Lin , Yang Tianyu , Wang Xunan
Published: June 2019

The uniaxial compression tests were carry out in 5 groups steel fibre concrete specimens for 3 kinds of curing age, and the effect of steel fibre incorporation rate and curing age was studied on the compressive properties of concrete. The results show that the compressive strength of steel fibre reinforced concrete increases with the increase of the ratio of steel fibre. When the steel fibre incorporation rate is constant, the compressive strength of the steel fibre has a small increase with the growth of the curing age. The addition of steel fibre can effectively improve the crack resistance and toughness of concrete. With the addition of steel fibre, plastic deformation ability of concrete is enhanced, and the ultimate destruction form of concrete is the shear failure with obvious oblique cross section.
Observation and Research on Seismic Response of Super High-rise Buildings
Authors: Zhou ChangXian , Zheng ShaoPeng , Ye YouQuan , Wang Hao , Fu Ping
Published: June 2019

With the development of social economy,the increase of urban population and the shortage of land resources,the world has set off a high-rise building construction climax,More and more population concentrated and land-saving super-high-rise buildings are put into construction and use. However,the story height of this kind of building structure is higher,the layout of flat elevation is more complex,the experience of actual earthquake damage is lacking,and the seismic design is not sufficiently based,so the damage situation of this kind of building structure under earthquake is more complex than that of ordinary regular structure. This paper mainly studies the response of super high-rise buildings under seismic force,and briefly summarizes the research methods of seismic performance of such buildings.
Research on BIM Forward Design Based on Oblique Photogrammetry Reality Model
Authors: Chen Jiao , Luo Yongquan , Du Weibing
Published: June 2019

With the rapid development and steady advancement of Building Information Modeling (BIM) technology in China, traditional 2D Digital Line Graphic (DLG) data cannot visually display rich 3D spatial information, and it is difficult to meet the needs of BIM forward design. Aiming at the increasing demand for 3D spatial data in municipal project design, this paper proposes a forward design method based on oblique photogrammetry reality model. Firstly, the Quadric Error Metrics (QEM) algorithm is used to lighten the reality model. Secondly, the standard model library of municipal facilities is built in CATIA, and the lightweight reality model is integrated into CATIA for fine restoration. The refined reality model can provide BIM designers with reference to features, geomorphology, etc., avoiding unreasonable spatial planning, no external reference to model monomers, and missing model space location information. It is convenient for designers to design, display, compare and modify the scheme in the same platform to improve the efficiency of BIM design. Change the delivery form of traditional surveying and mapping data results, and encourage designers to use BIM technology for forward design from surveying and mapping, and accelerate the popularization and promotion of BIM technology in the whole life cycle of the construction industry.
Civil Engineering Teaching Research Based on the Virtual Simulation Technology
Authors: Wang Gui-hua , Zhou Ji-guo
Published: June 2019

Apply three-dimensional virtual simulation teaching technology in the civil engineering specialized courses. The virtual simulation technology applies on undergraduate teaching, which makes the students be able to experience the engineering design, construction and experimental testing, and other operation process and the current standard in the classroom, also can understand the latest modern construction technology. Solve practical problems such as the construction process affected by seasonal factors, shortage of training equipment, update slowly and insufficient funds. At the same time, enable students to master the knowledge and skills, exercise the students’ innovative thinking.
Finite element analysis of thin-waist concrete-filled steel tubular short column under axial compression
Authors: Huang Yuning , Zheng Yongqian
Published: June 2019

A three-dimensional non-linear finite element (FE)model for thin-waist concrete filled steel tubular (CFST) columns is established. The mechanical properties of thin-waist CFST short columns under axial compression are analyzed. The ultimate strength and the axial load-axial curves calculated by the FE model are in good agreement with the experimental results. The FE model presented in this paper can be used for reference in the non-linear analysis of CFST columns.
Analysis of Breaking Mode of FRP Reinforced Concrete Beam and Calculation of Bearing Capacity
Authors: Yang Shuai , Xu Xinsheng
Published: June 2019

The application of FRP (Fiber Reinforced Polymer) in modern civil engineering is one of the new ways to solve the problem of steel corrosion. Because the stress-strain relationship of FRP bars is characterized by linear elastic characteristics, the structural properties of FRP reinforced concrete members are quite different from those of ordinary reinforced concrete members, and further research is needed. Based on the results of experiments and finite element analysis, this paper uses modern reinforced concrete structural analysis methods, combined with China’s current norms, to comprehensively analyse the FRP reinforced concrete beam’s mechanical characteristics, failure modes, fracture morphology and deformation characteristics, etc. The calculation method of the bearing capacity of the normal section of the curved member was systematically studied, and the calculation and design method for the characteristics of the FRP rib was established.
Numerical Analysis of Bolted Beam-Column Joint with FRP Reinforced at Beam-End
Authors: Ye YiLong , Zheng LianQiong
Published: June 2019

In recent years, some scholars suggested that the beam-end of beam-column joint of steel frame can be reinforced by fiber reinforced plastics (FRP) and filled with concrete. In this paper, the reversed cyclic behavior of this new kind of plastic hinge outward joint were studied by finite element analysis. The numerical study shows that, the plastic hinge can be successfully moved outside by reinforced beam-end as reinforced by FRP at the beam end and pouring concrete in the cavity. According to the parameter analysis, it can be found that, as the length of the FRP and the length of the concrete increased, the load carrying capacity and the initial stiffness of the joint increases, but the energy performance of the joint decreases slightly. The thickness of the FRP, paste FRP vertically or horizontally has slightly influence on the cyclic behavior of bolted beam-column joint with FRP reinforced at beam-end.
The Hamiltonian System Method for a Cylinder under the Action of Gravity
Authors: Yan Guifeng , Zhang Weixiang
Published: June 2019

The classical problem of a viscoelastic circular cylinder under its own weight is analysed in the Hamiltonian system. On the basis of the theory of state space for axisymmetric problems and the application of dual variables of stresses, the technology of variable separation can be used. Hence the fundamental solutions, zero eigenfunctions and non-zero eigenfunctions, are derived. Because of the integrity of the solution space, various boundary conditions can be described by certain combinations general eigenfunctions. By using the adjoint symplectic relations, the eigenfunction expansion approach is applied to satisfying the boundary conditions.
Prediction of Failure-Time for Soft Rock Tunnels based on Monitored Convergences
Authors: Feng Xianda , Jimenez Rafael
Published: June 2019

Predicting the failure-time for soft rock tunnels is an issue of great significance for disaster prevention and mitigation. The inverse-velocity (INV) method, which uses the rates of displacement to predict the failure-time, is often applied to predicting the failure-time of rock slopes. And the slope (SLO) method, which predicts the failure-time based on the slope (gradient), is another method for the same purpose. In this study, the validity of these two methods to predict failure-time of tunnels was evaluated by applying them to predicting the failure-time of the Ayas tunnel. The results show that the failure-time predicted by the INV method is closer to the actual failure-time compared with that predicted by the SLO method.
Calculation method of multi-regional power grid investment capacity based on debt-to-asset ratio
Authors: Lu Yanchao , Wang Yudong , Yang Jiale , Wang Yongli , Huang Yujing
Published: June 2019

Under the background of the new reform and regulation of electric power enterprises’ operation mode, the study on the investment capacity of an electric power enterprise is becoming increasingly urgent. At the same time, the enterprises are facing problems, e.g., it is difficult to allocate investment considering that electric power systems in different areas have different investment capacities. On this basis, an assessment method for the investment capacity of a multi-area electric power system is proposed based on debt - to - asset ratio. First, the comprehensive benefits are assessed. Then, the allocation coefficients are calculated by combining asset factors and performance factors, according to which the benefits are allocated. Accordingly, the investment capacities of electric power systems in different areas are calculated based on debt - to - asset ratio. Through the analysis of a case study of one city-level electric power enterprise, the investment capacity in the future is forecasted, which can provide reference for the investment plan of the enterprise.
The Research on the Consistency of the Testing Accuracy for Smoke Measuring Equipment Based on Ionization Chamber Principle
Authors: Wang Tingting , Yang Xinyan , Dai Miaomiao
Published: June 2019

A convenient method is proposed here to determine the relative accuracy of measuring ionization chamber (MIC). A non-dimensional quantity is presented here to characterize the relative accuracy of the testing MIC to the standard sample. Fire alarm with good repeatability and azimuth stability is used as the standard sample. The response threshold of the MIC to be measured is compared with that of the standard sample to determine its error and accuracy. This work may be benefit to testing laboratory, system manufactory and standard revision personnel.
A Fault Section Location Method Based on Matrix Beam Algorithm
Authors: Jianwen Zhao , Yanxin Ma
Published: June 2019

A fault segment localization method of resonant grounding system based on matrix beam algorithm is proposed. Analyzing the difference of the positive-sequence real-time current in the fault-added state between the upstream and downstream of the fault point when a single-phase ground fault occurs in a small-current grounding system. The criterion of the fault section is that the positive-sequence real-time current mainly flows through the upstream of the fault point. On this basis, the matrix beam algorithm is used to extract the instantaneous positive-sequence real-time power frequency amplitude of each detection point on the fault line of the resonant grounding system, and the area between two adjacent detection points with the largest amplitude difference on the fault path is the fault section.In addition, the effectiveness of the method is verified by the built matlab model.
The Algorithm of Local Modulus Maximum Detection Based on B-spline Wavelet
Authors: Jianwen Zhao , Hou Hui , Gao Shupin
Published: June 2019

At the time of fault, the system signal performances singularity, and the fault state can be diagnosed effectively through effective analysis and identification of singular signals. In this paper, for the problem that the singular signal modulus maximum point detection is inaccurate and the polarity is confused due to the improper selection of wavelet basis, the algorithm of local modulus maximum detection based on b-spline wavelet is proposed. B-spline scaling function is constructed by interpolation formula, the filter coefficients of b-spline wavelet function is calculated, in the process of signal decomposition of b-spline wavelet function and the effect of endpoint effect on signal singularity is removed, the signal local modulus maximum in the wavelet decomposition coefficient is extracted to accurately determine the time when the fault occurs. The result of simulation and experimental shows that the algorithm can not only detect the location of the maximum value of the singular point modulus accurately, but also distinguish the polarity of the modulus maximum and have good anti noise characteristics.
Research on Evaluation Model of Investment Efficiency of Power Grid Enterprise Under New Electricity Reform
Authors: Dong Zhang , Ruze Nuermaimaiti , Xiaoyan Song , Yu Xu , Qiong Liu
Published: June 2019

The three-stage DEA model was applied to study the investment efficiency of a power grid enterprise (PGE) under the reform of electricity transmission and distribution price. This research indicates that environmental variables, including GDP Per Capita and the proportion of industrial power consumption, have a significant impact on the investment efficiency of PGE. To be specific, GDP Per Capita and the proportion of industrial power consumption have a positive influence on the investment efficiencies of PGE in this research. Without environmental variables and random errors, the main reason for the low investment efficiencies of PGE was the lack of scale efficiency. In order to improve its investment efficiency, PGE should attach great significance to economies of scale and a reasonable plan of the enterprise scale.
Research on maturity of engineering project informatization management—As an example of Anhui Sanjian Engineering Co.,LTD.
Authors: Yao Deli , Zhou Rong , Fan Tengteng
Published: June 2019

With Anhui Sanjian Engineering Co.,LTD. as the research object, using the AHP, Delphi and CMM grading model, the index weight is calculated by Yaahp software, engineering project of Anhui Sanjian Engineering Co.,LTD. Engineering project information management maturity has carried on the preliminary judgment and set up evaluation index system of engineering project information management maturity in Anhui province.Through the comparison between the comprehensive evaluation score and the evaluation interval, it is concluded that the engineering project informatization management of Anhui Sanjian Engineering Co.,LTD. Engineering project information management maturity is at the management mode level.This paper studies and analyzes the current situation and deficiencies of engineering project informatization management construction of Anhui Sanjian Engineering Co.,LTD. engineering project information management maturity and points out the next development direction for its informatization management construction.
A Cross-current Masonry Technology for River Pole and Rock Dam in Distribution Network Maintenance and Construction
Authors: Yong Qian , Bin-Bin Zhang , Chang Lin , Xuan-Chen Long , Ling-Hong Chen
Published: June 2019

Some areas of the distribution network involve the installation of line poles through seasonal ditches or channels. In the design of rock dam construction, the traditional method has great resistance to water, which reduces the service life of rock dam itself after the formation of severe scouring. In this paper, the masonry technology of rock dam is analyzed, and a kind of cross-current dam masonry technology is designed to reduce the impact of water flow, which solves the problem of rock dam damaged by the impact of water flow and extends the practical service life of rock dam greatly.
Application of remote video monitoring system in transmission line construction
Authors: Zhenwei Yang , shihao Hu , Mei Kang , wei Yi
Published: June 2019

XX power supply company creatively uses the remote video monitoring system in the transmission line for real-time online monitoring. Through the remote wireless video monitoring system, construction site supervisors carry portable handheld terminals to realize real-time monitoring of the whole process of the construction line and play an auxiliary role in project management.
Finite Element Analysis and Structural Design of Vehicular Manipulator
Authors: Gan Yong , Zhang Qiufeng , Meng Xu , Wen Yongsen , Zhu Weiqiang
Published: June 2019

Based on the requirement of flexible operation of intelligent car in narrow welding environment, a vehicle-mounted manipulator which is capable of carrying spray gun was designed. In order to make the manipulator have reasonable structure and dynamic characteristics, SolidWorks software is used to carry out three-dimensional modeling, static stress analysis and modal analysis of the vehicle-mounted manipulator. Based on the experimental data, it is concluded that the end of the manipulator is easy to be destroyed, At the same the optimization design of the arm is carried out, such as lightweight, reinforcement of the load-bearing part and so on. The experimental results show that the maximum stress of the load-bearing parts is reduced by about 34.26% after optimization, while the maximum stress of the arm is reduced by 30.3% after optimization, and the mass is reduced by 53.3%. The performance is improved obviously, which provides a theoretical basis for the manufacture of intelligent car platform with thermal stress relief at weld joint.
Research on Control Unit of Motor Drive Brake Actuator
Authors: Wang XianYan , Li ChuanWu , Tan XiaoYan , Shi YanTao
Published: June 2019

It can be said that the core of car safety is the car brake and its control system. Along with the development of the car, the car brake and its control system has undergone many changes, from rubber friction braking solely relying on manpower to the later pneumatic brake system, hydraulic brake system and so on. Among them, the hydraulic brake system is the most widely used. With the continuous advancement of technology, electric drive machines are widely used in vehicles. Research on electric power assisted hydraulic brake systems has become a hot research topic in recent years, as autonomous driving and driverless. Essential and key components are the inevitable trend and the best solution for the next generation of automotive braking systems. This study describes a control unit for a motor-driven brake actuator that analyzes its role, structure, and advantages in an electric-assisted hydraulic brake system.
Research on frost resistance of seawater sea-stone concrete
Authors: Cai Hong-ming , Qing WU , Shen Lin
Published: June 2019

In this paper, the frost resistance of C30 seawater sea-stone concrete (SSC) under double corrosion in Marine environment is studied. In this paper, the relative dynamic modulus of elasticity, mass loss, micro morphology and composition of artificial sea water were tested and analyzed. The results show that under the condition of water conservation, SSC mass loss of 5% or more when chloride ions reduce after 40 times of freeze-thaw cycle.The freeze-thaw cycles of the quality loss and relative dynamic modulus of elasticity loss model are established respectively. The microscopic analysis of concrete in sea water stone are done,added to concrete in freeze-thaw and external double seawater corrosion performance.
Assessing the Restorative Quality of Healthcare Indoor Environment
Authors: Gao Chong , Zhang Shanshan
Published: June 2019

The restorative quality of healthcare environment is of vital significance for patients’ mental well-being, which would influence their overall recovery through an psychology-physiology interaction. However, there were few applicable methods to assess such quality. This study was therefore conducted to develop the Hospital Indoor Restoration Scale (HIRS) for the user-centered environmental evaluation. To achieve this, a literature review was made to screen out items of the scale, which was tested with surveys among patients, and further modified through statistical analyses. The result shows that the restorative quality of hospitals’ indoor environment could be evaluated by the 16-item scale of three dimensions, namely Vitality, Reassurance, and Support. The model could explain 73.61% of the variance, and the Confirmatory Data Analysis shows that it fits the hypothesis well and has good validity (χ2/df = 3.20, GFI = 0.91, CFI = 0.95); The Cronbach α ≥0.88, indicating good reliability of the scale. The study has completed the theoretical construction of hospitals’ indoor restoration and offered a guidance for related architects, managers and policy makers to make evaluations and optimization of healthcare environment for patients’ restorative outcome improvement.
Evaluation guide for green tourist cities
Authors: Zong Jianfang , Li Yan , Lin Ling , Bao Wei
Published: June 2019

Green tourist cities are a kind of cities with unique resources such as unique natural sceneries or humanistic resources, can attract tourists. This paper puts forward an evaluation indicator system for measuring green tourist cities in 7 aspects of tourist resources, tourist services, infrastructures for tour, resource utilization and environmental protection, humanity, number of tourists and tourism revenue.
Differences in spatial and temporal characteristics of leisure activity between low-income and non-low-income groups: A case study of Nanjing
Authors: Wang Hui , Hu Mingxing
Published: June 2019

Leisure activities play an important role in people’s daily life and are closely related to residents’ physical and mental health. Studies on leisure activities have increased sharply in recent decades. However, comparison studies of leisure activities of residents with different socio-economic attribute have received less attention. Based on an activity diary dataset, this study seeks to examine differences in the temporal and spatial characteristics of low-income and non-low-income groups. The results indicate that the characteristics of leisure activities between the two income groups are significantly different. Compared with non-low-income individuals, low-income individuals have more leisure time available, however, their leisure activities are monotonous in terms of types and geographical distribution. Social policies are suggested to support the equitable distribution of urban leisure resources, especially the low-income communities which are located far from the city center.
Effects of intercropping with post-grafting generation of Impatiens balsamina on potassium uptake of grape seedlings under cadmium stress
Authors: Yang Liu , Wang Ting , Xia Dan , Lin Lijin , Liao Ming’an
Published: June 2019

Grape seedlings and post-grafting generation of Impatiens balsamina were used as materials to intercrop for exploring the effects of the potassium uptake of grape seedling under the stress of cadmium. There were five treatments in this experiment including one grape seedling monoculture and four intercropping treatments. According to the results, the testing indicated that the content of total potassium in leaf, stem and root of seedling and soil available potassium in grape seedling monoculture were all higher than that in intercropping treatments, and the content was all ranked as: grape seedling intercropping with PSSG < intercropping with PSDG < intercropping with PSG < intercropping with UG < grape seedling monoculture. In terms of soil available potassium, the content had no significant difference when grape seedling intercropped with PSSG, PSDG and PSG. So while intercropping with Impatiens balsamina of post-grafting generation, the total potassium and soil available content could not increase. On the contrary, it decreased. Therefore, intercropping treatment did not play a positive role in potassium uptake and had no significant promoting effects on plant growth and development.
Digital Green Certificate Generation And Trading System Based on Internet of Vehicles Platform
Authors: Yuanxing Zhang , Bing Jiang , Dunnan Liu , Taoyong Li , Lingxiang Wang , Yongxiang Liu , Qingqiang Xu
Published: June 2019

In February 2017, various new energy power generation enterprises and power users have attracted wide attention, after the issuance of the green power certificate and the issuance of the trial notice of voluntary subscription system. This paper makes a detailed investigation and analysis of the research status of green energy certificate trading at home and abroad. Then, based on the status quo of the company’s Internet of vehicles platform, green certificate generation and transaction architecture, transaction subject and transaction process are designed. Finally, based on the above basis, five green certificate trading business models, namely, trading platform mode, energy storage system mode, demand side management service mode, new business mode of electric vehicles and energy big data information service mode, are designed and analyzed.
Research and Development Review on Marketization of Forest Environmental Resources
Authors: Jian-lan SU , Jian-qin LI
Published: June 2019

Based on a large amount of document materials, the concepts and measures that realizing marketization of forest environmental resource have been studied in this paper. Detailed content included evaluation value and clearly established ownership of forest environmental resource, the main issues that affected forestry marketization, such as principal-agent analysis, capital investment, the laws and government regulations and carbon sequestration market. Finally summarized the valuation and prospect of problems mentioned above. The purpose is going to provide basic messages and rational orientations for forest environmental resource development and research.
Analysis of the Impact of Green Finance on High Energy Consumption Industry
Authors: Ning Jie
Published: June 2019

The rapid development of China’s economy in recent years has brought up serious ecological and environmental problems. The development of green finance can help the coordinated development of economy, society, resources and environmental protection. This paper applied the gray correlation advantage analysis method, inwhich selected the main indicators of the green financial system, and analyzed the correlation of the development of the six high energy-consuming industries. The results show that the green financial system has obvious relevance to the development of high-energy-consuming industries.
Research on Green Building Incremental Cost Optimization
Authors: Chunling Sun , Zhiying Li , Xin Li
Published: June 2019

With the gradual improvement on people’s awareness of environmental protection, green building is an inevitable trend for the future development of the construction industry. However, the existence of the incremental cost of green building has become the biggest obstacle to its development. This paper analyzes the factors that can optimize the incremental cost, proposes a reasonable optimization scheme for the calculation and analysis of actual cases, and extracts some other controlled measures and optimization suggestions of incremental cost. It provides a more scientific theoretical basis and feasible scheme for the comprehensive analysis of the optimization of green building incremental cost.
Research on Urban Transportation Sharing Products under the Concept of Human-Oriented Transportation
Authors: Chen Jian , Zhang Taiming , Yang Shangcong , Song Peizheng , Qi Huaiyuan
Published: June 2019

With the development of urbanization, the increase of urban population will bring great pressure to urban traffic. In order to meet people’s traffic demand and the pursuit of their own value, human-oriented transportation has emerged. This paper first introduces the evolution process and experience of urban transportation in western developed countries, and analyzes the current situation of urban road design, construction and management. Secondly, this article takes urban transportation sharing products as the starting point, and analyzes the humanistic concepts and design methods needed for transportation sharing products. Finally, we will study how people-oriented traffic can cooperate with urban transportation sharing products and make reasonable suggestions, thereby creating a city traffic space where people, cars, roads and the environment develop harmoniously.
Pile Load Test of Post-grouting Bored Pile at Beijing Capital International Airport
Authors: Zheng Ai-rong , Chen Zhi-jun , Zhuge Ai-jun
Published: June 2019

Bottom slime and shaft mudcake are two principal deteriorative factors affecting the mobilization of bearing capacity of slurry bored piles. As an effective later improvement technology, post-grouting can significantly improve bored pile bearing capacity. Based on static load test results of Beijing capital international airport project, vertical bearing properties of post-grouted bored pile have been studied. The analyses reveal that: with pile-toe and pile-shaft post-grouting, the interface between pile and surrounding soil was strengthened and the relative sliding displacement in between was reduced, end resistance of pile was enhanced and could be mobilized at earlier stage with smaller sliding displacement. As a result, the performance of bored pile was improved with increased bearing capacity and reduced settlement.
Primary Exploration of Operation Model and Strategy of Rural Land Circulation from the Perspective of Anti-poverty Development
Authors: Zhiqing Yan , Zisheng Yang , Wen Zhong
Published: June 2019

Anti-poverty development is a powerful engine to realize a moderately well-off society in an all-round way in 2020; meanwhile, it also endows more missions and obligations to scientific study and development of land resource management in the new ear and demands urgently China to transform its thoughts and patterns of land utilization. Therefore, with circulation of rural land as the research object, the current situation and characters of the circulation of rural land are discussed in this essay, and the patterns of land circulation which are beneficial to poverty alleviation are explored by analyzing the advantages and disadvantages of the existing land circulation models. It is considered preliminarily that share holding system is an ideal option of circulation of rural land against the background of anti-poverty development, for it could induce actively the raw power of regional industry poverty alleviation and motivate further the farmers’ enthusiasm for poverty alleviation. Based on thorough discussion of share holding system, this essay also puts forward policy suggestions on promoting circulation of rural land, considering that consummating poverty system, defining land property right, establishing risk-sharing system of land circulation, perfecting rural social security system, cultivating sharing land cooperatives, constructing intermediary organization of rural land circulation, strengthening management and service of rural land circulation, speeding up adjusting agricultural management system and guiding orderly circulation of land management right shall be the preferential initiatives to promote anti-poverty developmental circulation of rural land.
Case study on emergency disposal of aniline pollution in Zhanghe River
Authors: Sili Chen , Lishi Feng , Chaoyi Pan , Dinghao Chen , Qingwei Guo , Sha Chang , Ji Wang
Published: June 2019

In view of the frequent occurrence of secondary environmental pollution caused by safety production accidents in China, a typical case of Zhanghe aniline pollution emergencies is selected and a comprehensive and systematic introduction to the emergency disposal technical scheme of this event is introduced, including the emergency target and general idea, situation prediction, response measures and summary of emergency disposal, which can be used for reference for the same type of emergency disposal technology for environmental emergencies in the future.
Synthesis and application of electrode materials for lithiumion batteries
Authors: Jiayi Wu , Nanjing
Published: June 2019

Lithium-ion battery has been widely used in various portable electronic products due to its benefits of high energy density, power density and average output voltage, longer cycle life and so on. However, the traditional LiCoO2 cathode material has many problems, such as resource scarcity, high price, toxicity and small actual specific capacity, which cannot meet the current development needs of lithium-ion batteries. Therefore, the development of new high capacity and low price electrode materials is one of the focuses of lithium-ion battery research. This paper summarizes the development and pros/cons of organic and inorganic hybrid materials, conductive polymers and transition metal chalcogenides as new electrode materials, covering the design, synthesis and electrochemical properties of each material. Meanwhile, the structure and morphology of the new electrode material can be characterized by means of transmission electron microscope, scanning electron microscope, X-ray diffraction, Raman spectrum, infrared spectrum and other characterization methods, which could explain the performance of lithium storage.
Research on The Development of Real Estate Market Based on Population Change in China
Authors: Zhang Hongli , Lu Tiantian , Sun Yuhang
Published: June 2019

China is a populous country, and population problem is always one of the key factors restricting the development of national economy. From the beginning of the founding of the people’s Republic to now, the population policy has been changing constantly, and the population structure has also undergone remarkable changes. At the same time, the real estate industry, as a new growth point in the national economy, to a large extent, has promoted the development of the national economy, and has become a pillar industry in the national economy. In recent years, some scholars consider the change of population structure when studying the change of real estate market, but less consider the macro factor of population quantity behind the change of real estate market. So this article will pass through the short term in the future The influence of population change trend on real estate market in China is studied and discussed.
Simulation and Analysis on the Optimal Tax Rate of Water Resources in Yunnan Province
Authors: Li Min , Liu Chunxue , Xu Shuang
Published: June 2019

The shortage of water resources has become an increasingly common problem. One of the biggest challenges in China’s current economic development is the prominent contradiction between water supply and demand in some densely populated areas. Although Yunnan Province has abundant water resources, due to factors such as precipitation timing, uneven distribution, regional geological conditions and low water-use efficiency, there are also contradictions in water supply and demand. In order to accelerate the transformation of extensive regional water resources utilization and achieve sustainable regional economy development, this paper establishes a Computable General Equilibrium Model (CGE) incorporating water resources elements of Yunnan Province, and simulates the water price changes. The conclusion is that the reasonable tax rate of water resources in Yunnan Province should be about 13%. Considering the corresponding average water price, the average specific tax rate of water resources should be 0.21 yuan/m3.
Towards safe and economic Arctic shipping
Authors: Hu Bing , Li Zhiyuan , He Xin
Published: June 2019

We present a framework for safe and economic maritime operations of Arctic cargo ships. The framework comprises analyses from various perspectives and targets at safety and fuel efficiency of existing and future cargo vessels that are designed mainly for open water operations. International and national regulatory requirements regarding Northern Sea Route (NSR) transits were examined. The Arctic shipping status and challenges are analyzed using data collected by shipping companies. This article also proved that the Arctic routes save large percentage of sailing time and fuel costs.
Evaluation of Ultralow Emission Performance of Magnesium Oxide (MgO) Wet Flue Gas Desulfurization Unit for Coal-fired Units
Authors: Litao QU , Caiting LI , Chao LI , Fengyuan HE , Honghai YU , Jia DU , Wang Dexin , Xiaohui QI
Published: June 2019

Performance tests and evaluations were carried out on the magnesium oxide (MgO) wet flue gas desulfurization unit being used in the ultra-low emission reformation of coal-fired units. It is of reference for units that have not yet carried out ultra-low emission transformation. Taking a magnesium oxide (MgO) wet flue gas desulfurization device of a 350MW coal-fired unit that has completed ultra-low emission modification as the research object, The main performance indexes such as desulfurization efficiency, GGH air leakage rate and reducing agent consumption of the device were tested, and the system operation status were mastered. The test proves that when the magnesium oxide (MgO) wet flue gas desulfurization device used in the desulfurization ultra-low emission reform of the unit is operated under design conditions, It can maintain high desulfurization efficiency and low SO2 emission concentration for a long time, and the main design indicators can meet the design value requirements. The effect of GGH leakage rate on SO2 emission concentration is obvious, resulting in system desulfurization efficiency slightly lower than that of absorption tower desulfurization efficiency.
Numerical Simulation of Single Droplet Combustion Characteristics in High Temperature Convection Environment
Authors: Fan Xinsheng , Lu Xin
Published: June 2019

In order to better study the combustion characteristics of small droplets during spray combustion, a mathematical model of single fuel droplet evaporation and combustion was established based on the numerical simulation method of VOF(Volume of Fluid). Numerical simulation was carried out using FLUENT. The combustion process and flame propagation characteristics of the small droplet in the convection environment under different pressures of 0.1 MPa, 0.2 MPa and 0.3 MPa, were studied respectively, and the influence of different ambient pressures on combustion was analyzed. The results show that due to the influence of air convection, the ignition position was located in the downstream area of the droplet, forming a wake flame. Then the flame gradually overcame the convection effect and developed upstream, and finally transformed into the enveloped flame. With the further development of combustion, the combination of fuel vapor diffusion and combustion promoted the development of the flame front in the direction of airflow. After reaching the balance each other, the position and temperature of the flame front would be relatively stable. The increase of ambient pressure promoted the combustion process, which increased the droplet burning rate and flame temperature. At the initial stage of ignition, the temperature rise rate of the average droplet temperature at 0.3 MPa was 1.18 K/ms, which was 32.6% higher than that 0.89 K/ms at 0.1 MPa.
Enough for all: no mating effort adjustment to varying mate availability in a gift-giving spider
Authors: Magris Martina , Tuni Cristina
Published: June 2019

Males of a gift-giving spider do not modify their allocation to reproduction when mating opportunities vary. Due to their costly courtship via provision of food gifts to females, with high female availability males should reduce their reproductive investment per partner to avoid exhausting their energetic budget too early. Our findings suggest instead that males may be able to enlarge their total reproductive budget, possibly drawing resources from their food gifts by partially feeding on them.
A Rationale for Change: An Increase in Invasive Pneumococcal Disease in Fully Vaccinated Children
Authors: Blyth Christopher C , Jayasinghe Sanjay , Andrews Ross M
Published: June 2019

Increasing numbers of cases of invasive pneumococcal disease in fully vaccinated children have occurred in Australia since 2013. A review of cases informed a change from a “3 + 0” infant schedule (13-valent pneumococcal conjugate vaccine at 2, 4, and 6 months) to a “2 + 1” schedule (2, 4, and 12 months).
The impact of Helicobacter pylori on the presence of Barrett's esophagus in Azerbaijan, a high-prevalence area of infection
Authors: Aghayeva S , Mara K C , Katzka D A
Published: June 2019

There is a strong evidence that Helicobacter pylori infection is inversely associated with Barrett's esophagus. In a high-prevalence region of H. pylori, low rates of esophageal cancer and its precursor BE may indicate its preventive effect. The aim of this study is to determine the impact of H. pylori on characteristics of Barrett's esophagus.

A total of 3317 outpatient upper endoscopy reports from 2013 to 2015 from an urban center in Azerbaijan from all patients with dyspepsia were retrospectively analyzed for patients with Barrett's esophagus. This was matched in a 1:2 ratio to age and gender matched control patients without Barrett's esophagus. The prevalence of H. pylori on Barrett's esophagus and the randomly selected control group were compared.

There were 83 patients with BE and 167 control group cases. Biopsy-proven BE was diagnosed in 83 patients: 39 (47%) females, with mean age 43.1 ± 13.3 years. Of these, 13 (15.7%) had long segment and 70 (84.3%) had short segment Barrett's esophagus. A control group included 167 patients: 78 (46.7%) females, with mean age (45.8 ± 13.9). All patients were Caucasians. The rates of gastric inflammation, the presence of atrophy, and intestinal metaplasia in gastric specimens did not differ in patients versus controls. The prevalence of H. pylori was determined as 63.2% in male and 61.5 in female groups (odd ratio (OR) = 0.99 95%CI 0.97, 1.01; P = 0.22). Inflammation of gastric mucosa was strongly associated with the infection (67% vs. 33%; OR = 4.46 95% CI: 2.01, 9.92, P < 0.001). Atrophy was noted in majority of H. pylori-positive cases (OR = 1.43, 95% CI: 0.36, 5.65; P = 0.61). Gastric intestinal metaplasia was observed in 55.6% of H. pylori-positive patients and in 44.4% of negative individuals (OR = 0.74, 95% CI: 0.28, 1.94; P = 0.54). There was not a significant difference in the prevalence of HP in BE and control groups; 63.9% were positive for infection in BE cases and 61.7% of controls (OR = 1.10, 95% CI: 0.64, 1.90; P = 0.74). We found that neither presence of erosive esophagitis, length of BE nor dysplasia (45.5% of H. pylori-positive group, whereas 54.5%) was associated with the presence of the H. pylori infection (Table 1).

In a predominantly Caucasian nation with a high prevalence of H. pylori gastritis, the presence of H. pylori was not inversely associated with the presence of Barrett's esophagus. These data challenge the mechanistic implications of this association.