bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical simulation of ground penetrating radar based on advanced prediction of adverse geological bodies
Authors: Li Shaojie , Hu Rongming 
Published: December 2019

Abstract
The geological conditions of the unfavorable geological bodies and the monitoring environment are characterized by diversity and complexity. It is still very difficult to use ground penetrating radar(GPR) to detect and interpret later. In this paper, the finite-difference time-domain method is used to simulate the propagation process of electromagnetic wave of GPR in the models of water-filled, mud-filled and fractured zones formed by cavities, faults and faults, and the response characteristics of electromagnetic wave under different conditions are analyzed. The results show that the simulation results coincide with the model design data, which proves that the numerical simulation results can provide a reference for the graphic interpretation of the actual exploration results. The A-Scan diagram shows that when the electromagnetic wave enters the medium with large dielectric constant from the medium with small dielectric constant, the phase of the wave will change, and the greater the difference of relative dielectric constant is, the stronger the radar reflection signal will be. At the same time, the model results show that the energy of electromagnetic wave will decay sharply under water-bearing conditions, and multiple waves will be formed below, which can provide a reference for ground penetrating radar in the actual detection of water-bearing cracks.
Architectural Acoustic Application of Medical Space Roof Wall System Based on Prefabricated Interior Decoration Technology
Authors: Li Xiuyun 
Published: December 2019

Abstract
The roof wall system building components carry the functions of sound absorption, fire prevention, decoration, environmental protection and comfort, which can well solve the problems of medical space efficiency, quality and benefit. Based on the development trend of the assembled interior technology, the green and precast glass fiber reinforced gypsum components and inorganic high-strength sound absorbing board are selected as the engineering practice decoration materials for the integrated ceiling and wall of multiple spaces in the hospital. The application status of boards in architectural acoustics is introduced, along with the application status of assembled type medical space roof system, which provides practical experience of the fabricated interior technology.
Dynamic response analysis of submarine tunnel under different wave loads
Authors: Ouyang Zhiyong , Li Peijie , Luo Ruofan , Feng Zhuojun 
Published: December 2019

Abstract
Based on theory of Biot’s dynamic consolidation and the elastic dynamics, this paper considers seabed soil and the contact effect of the tunnel, the seabed soil along the depth direction variability and viscoelastic boundary. The two-dimensional finite element model is established to compare the wave force acting on the seabed surface, which causes the internal stress of the tunnel and its dynamic response of the seabed in the first-order elliptic linear wave, cosine wave and the second order stokes wave. Results show that when the relative water depth is larger, the first-order elliptical cosine wave theory used to calculate the dynamic response of the seabed-tunnel will underestimate the seabed soil liquefaction resistance and tunnel resistance to deformation ability. And when the relative water depth is smaller, the linear wave theory to solve the dynamic response of the seabed-tunnel will overestimate the seabed soil liquefaction resistance and the ability to resist deformation of the tunnel. With the increase of L/d and T wave parameter, the first-order elliptical cosine wave and the degree of nonlinear second order stokes wave are in increase. Compared with the linear wave, the seabed soil around the tunnel of pore water pressure, displacement and the internal stress amplitude of the tunnel are obviously increasing.
Analysis of Friction-Slip Characteristics of Pot Bearings in Continuous Curved Girder Bridges
Authors: Han-zheng Xu , Xiao-tao Li , Qing Liu , Hong Pan 
Published: December 2019

Abstract
In order to study the influence of friction and slip effect of bearing on transverse deviation of concrete curved beam bridge, the solid model of basin rubber bearing was established by ANSYS. Based on this, the stress and deformation of PTFE plate, basin ring, compressed rubber block and base plate were analyzed in detail; the vertical of the bearing was simulated by finite element method. The load-displacement curves are compared with the bearing capacity test results of 2.5MN basin rubber bearing completed by the Highway Science Research Institute of the Ministry of Transportation. The results show that the basin rubber bearing has stable mechanical properties, and the maximum principal stress, vertical compression deformation and radial deformation of the bearing under the design vertical load satisfy the design requirements; the maximum error between the calculated value and the experimental value of the vertical compression deformation is 4.8%, which verifies the accuracy of the finite element model and is for the follow-up. Foundation for analysis of friction and slip characteristics of traveling bearings.
A new algorithm of dangerous points accurately identification on mechanical structure under dynamic loads
Authors: Zhang Yan-gang 
Published: December 2019

Abstract
Identification of dangerous moment of mechanical structure is a key process for dynamic response optimization. The dangerous moment of identification method for solution space of dynamic response based spectral element was proposed according to the insufficient of traditional method, which was difficult to accurately determine structure dangerous moment. The solution space of structure dynamic response was obtained by using the modal superposition method. The matrices of time points and their corresponding solution space values of dynamic stress were constructed. The Lagrange interpolation method was applied in the solution space domain to getting dynamic response function of high precision. Finally, the most dangerous moment of structure under dynamic loads was found by executing the global optimizer, though constructing a mathematical model to identify dangerous moment. The theoretical research results were applied to engine piston with dynamic loads to verify, and results showed that dynamic stress and dynamic displacement was not simultaneously reach extreme moment of the dynamic load, due to the nonlinear relationship between stress-strain and strain-displacement of structural. The existence of a time gap between them leads to dynamic optimization design is inaccurate. Dynamic optimization design should also consider two dangerous moments in order to avoid structure inaccurate design. This paper is the foundation of dynamic response optimization of piston.
Research and Application of Over-filling Monitoring Technology for Underwater Cast-in-place Piles
Authors: Wei Yongbin , Cao Zhen 
Published: December 2019

Abstract
The quality of the pile head is the construction controlling difficulty of the concrete cast-in-place pile technology when the bored piles, especially the deep foundation piles, are filled with underwater concrete. The hammer method and volume estimation method are widely used to control concrete over filling in the prior technology. However, in the actual operation, these two methods are inclined to cause misjudgment by the field technicians, so it is difficult to accurately determine the height of the concrete, resulting in the under or over height of the pile head, which seriously affect the construction quality and greatly increase engineering costs in construction sites. In order to solve this problem, based on the principle that the mud density of the bored pile and the concrete density are different, and the pressure difference is generated at a certain depth, in this paper a liquid pressure sensor, da-ta acquisition module, wireless communication module, remote network server and monitoring terminal were used to develop an overfilling control-ling device for underwater concrete bored piles. Several engineering field tests were carried out and the test results showed that the device could accurately monitor the timing when concrete reaches the designed pile top elevation position and the specific quantitative height in the underwater pouring process, and can alarm after exceeding the limit as while. The method is simple and practical, and has high promotion value.
Analysis of Ultimate Bearing Capacity of Large Span Continuous Rigid Frame Curved Bridge
Authors: Yang Xiaochong , Xu Hanzheng 
Published: December 2019

Abstract
In order to study the ultimate bearing capacity of the large span continuous rigid frame curved bridge, a three-dimensional solid finite element model of a curved bridge was established based on ANSYS software. Different load cases were considered in analysing the ultimate bearing capacity. The results show that the loading process of the selected background curved bridge can be divided into elastic, elastoplastic and failure stages. Besides, under the most unfavourable load case, the living load coefficient and the safety factor is are 20.40 and 2.94, respectively. This indicates that the calculation formula of ultimate bearing capacity provided by the current standard has enough safety degree. In addition, because of the coupling effect of bending and torsion, the tensile stress and compressive stress on the outside of girder are larger than those on the inner part. Moreover, the ultimate bearing capacity of vehicle eccentric loading is lower than that of medium load, which should be considered in the design.
Research on Design Index for Continuous Uphill Gentle Slope of Expressway in Mountainous Area
Authors: Pan Binghong , Kong Bingjie 
Published: December 2019

Abstract
On the basis of analyzing the measured data of the uphill slope and establishing the relationship model between the decrease of truck operation speed and the traffic accident rate, put forward admissible speed reduction standard. According to the distribution of truck load truckload tonnage and power weight power-weight ratio, select the researching dominant vehicle comprehensively. The design index of uphill gentle slope is obtained based on recovering the operation speed of trucks and considering the climbing performance curve of the leading vehicle on the uphill gentle slope section. The research results can provide a reference for the design of uphill gentle slope of expressway in mountainous area.
Test and Design Method for the Performance of Anchor Nodes between an Underreamed Anti-floating Anchor and the Bottom Structure
Authors: Guo Gang , Yang Daopeng , Zhong Guang , Liu Zhong , Xue Zizhou 
Published: December 2019

Abstract
The number of applications of underreamed anchors with high bearing capacities rapidly increases with the increase in building volume. Scholars and engineers worldwide have reported their researches on the bearing mechanisms and failure modes of underreamed anchors. However, the high capacity of anchors generates new problems for building structures, including the key design point of the anchor node between the high-capacity anchor and the structure in anti-floating engineering. Currently, there is no relevant research report or technical standard. To address this issue, a series of full-scale tests on steel anchor plates are conducted in Nanjing, China. Through these tests, a regular set of test results is obtained. Based on the obtained results, a calculation method for the bearing capacity of the anchor plate is derived, and a complete design method for the anchor node is presented. Furthermore, waterproofing and anti-corrosive construction methods for the anchor node are discussed to perfect the design work of the anchor node.
Numerical analysis study on seismic behavior of resilient high strength concrete columns reinforced by ultra-high-strength bars
Authors: Shao Jiabang , Zhao Shichun , Sun Yuping 
Published: December 2019

Abstract
To make concrete columns with drift-hardening behavior and small residual deformation, a simple method is proposed. The method is the use of ultra-high-strength (UHS) PC wire strands as longitudinal reinforcements of concrete columns. The effectiveness of the method has been verified by experiments. The purpose of this paper is to present an analytical method for simulating seismic behavior of resilient high-strength concrete columns reinforced by PC strands, based on reliable constitutive laws of the PC strands and the concrete. Five square concrete columns with the cross-section of 250mm × 250mm, the height of 1000 mm, the shear span ratio of 2.0, the axial load ratio of 0.25 and compressive cubic strength of 95 MPa were fabricated and tested. The experimental results were compared with the results predicted by the analytical method. Comparisons indicate that the proposed method can predict the development trend and feature points of the envelop curve of the columns until large deformation. Comparisons also indicate that the calculated flexural capacities by the proposed method show very good agreement with the test results. Utilizing the proposed method and the current design code, which are used to evaluate the ultimate flexure and shear capacities, respectively, can give a reasonable evaluation of the failure mode of concrete columns.
Stress analysis of arch foot of tie arch bridge based on spatial multi-scale model
Authors: Wang Qi , Li Tao , Wang Tao , Mao Wangtao 
Published: December 2019

Abstract
For the arch foot connection structure of a steel box tied arch bridge in Guizhou Province, the spatial multi-scale finite element model is established by substructure method, and the influence line is loaded. The calculation results show that under the action of “dead load + live load”, the overall stress of arch foot is reasonable and the stress distribution is uniform, but the bearing roof, side web of arch foot and tied rod roof are complicated and the stress concentration is obvious. In the process of operation and maintenance, in order to ensure the safe use of bridges, we should focus on the observation of such components.
Research on Arterial Highway Traffic Safety Risk Assessment Method
Authors: Zhao Yifei , Xiao Shan , Wan Hang 
Published: December 2019

Abstract
Currently, research on arterial highway traffic safety risk assessment and control techniques are limited. Back Propagation (BP) Neural Network, fuzzy logic algorithm, Principal Component Analysis (PCA) and Analytic Hierarchy Process (AHP) are the common used methods in the existing studies. These methods take into account all the risk factors without effective selection. This may lead to complicated computation and procedures and poor time effectiveness, which would hinder the wide spread and application of safety risk assessment among design engineers and operators as well as in different levels of roads. The outcome of the study makes the significant contribution to accident hazardous locations treatment measures. Therefore, based on historical traffic accident data, this proposed an applicable, ease of implementation and simplified road risk assessment method which can effectively assess hazardous locations. The paper collected the historical data of an arterial highway to verify the proposed method. The results match the actual road safety situation.
A multi-scale and multi-medium numerical model of a multi-fractured horizontal well in tight oil reservoir of daqing oil field
Authors: Fan Yang , Qiquan Ran , Jiaxin Dong , Guanzhong Shen , Yijing Feng , Junlong Zhao , Mengya Xu , Lifeng Liu , Suqi Huang 
Published: December 2019

Abstract
The macroscopic geological conditions and microscopic pore characteristics of tight oil reservoirs are always complex. A multi-medium and multi-scale numerical model which can best embody tight oil reservoir features for a multi–fractured horizontal well (MFHW) is hard to establish. Without a reasonable numerical model, the evaluation and adjustment of a MFHW in a tight oil reservoir are difficult to fulfil. Based on the experiment results, geological data and construction parameters of the Pu34 well area, this paper establishes a multi-scale and multi-medium numerical model of a MFHW, Well X, in Daqing Oil Field and simulates the development effect of Well X after refracturing measurement. The results show that three types of reservoirs and four kinds of pore media exist in the Pu 34 area. The history match shows the numerical model works well. By using this numerical model, the Well X, after re-fracturing, would perform better than without re-fracturing in the early stage of production period, and it also increases the cumulative oil production by 223t after production of 10 years. In economy regard, it has faster oil recovery rate which is helpful for company to recover the investment cost of this well.
Update evaluation of garbage classification and recycling equipment based on analytic hierarchy process
Authors: Wu Siqi , Zhang Yaosheng , Wang Xue , Zhang Yuehua , Sun Yanbin , Wang Changbao 
Published: December 2019

Abstract
So as to achieve the reduction of urban household waste, resources and harmless, improve the level of urban development. Through analytic hierarchy process (AHP), the update of garbage classification and recycling equipment can be analyzed intuitively and quantitatively. The analytic hierarchy process (AHP) model was established to obtain the parameter proportion of the factors affecting the renewal of garbage classification and recycling equipment. So as to select the best scheme and make the resources play the biggest role.
Natural Ventilation Performance Simulation and Analysis of New Type Sound Insulation Window
Authors: Fayuan Wu , Ping Liu , Xiaolei Liu , Xiaomin Dai , Yuangen Zhang 
Published: December 2019

Abstract
To evaluate the ventilation performance of new type sound insulation window, a window model with streamline-structure micro-perforated panel absorber (MPA) was simulated based on computational fluid dynamics (CFD). Finite element model of the insulation window was built to analyze the flow field in muffler channel, velocity in vent and pressure loss of the channel. To contrast with the simulation model, an insulation window artifact was produced and tested in ventilation quantity detection. The results show that the dominant pressure loss is local hydraulic loss that comes from MPA structure. The total pressure loss increased by 4.3 Pa under 0.5 m/s inlet wind velocity. The difference of pressure loss between simulation and actual test is 6.3%. CFD simulation is an effective and low-cost method to evaluate the ventilation performance with visual results. The results provide valuable reference for optimal design of insulation window.
Research progress of urban green space systems evaluation in China
Authors: Zhang Chunxiao , Yue Bo , Wang Yafei , Xie Rui , Shen Guangzhe 
Published: December 2019

Abstract
Since the founding of the People’s Republic of China 70 years ago, the theory of urban green space system planning have been evolving along with the urbanization process. At the same time, it also draws nutrients from the planning thoughts of western developed countries. Under the background of ecological civilization construction, urban green space is more affected by the attention of the government and the public, urban green space system planning is the overall distribution of green space resources, reasonable construction of the important means of urban ecological environment, but the study of urban green space system planning evaluation has not yet been thoroughly. Urban green space system planning in China based on the development process and the landscape architecture of self-perfection for context, from the connotation of urban green space system planning evaluation, three aspects of theory and practice, combing summing up China’s urban green space system planning evaluation.
Regional Difference Survey of Wastewater Treatment Methods in Highway Service Areas of China
Authors: Ni Dong , Li Gang , Han Gensheng , Deng Zhigang , Shao Shegang 
Published: December 2019

Abstract
This thesis, based on questionnaire survey, field investigation, sewage sample test etc., studies the relationship between water consumption and discharging volume, type and process of sewage treatment facilities, and statistical analysis of sewage discharge whereabouts in highway service areas. There are 35.5% and 27.6% respectively in the service areas of north and south China without sewage treatment facilities installed or operated. The great difference between the highway service areas of north and south China lies on the differences in geographical location, climate and level of economic development. The problem of nearby discharging of sewage and sludge in the service areas, lower recycle rate, unused or damaged sewage treatment equipment seems to be prevalent. On the whole, quite a few sewage treatment facilities and processes in service areas are not capable of managing the sewage in service areas, which has great potential for improvement.
New Solution To Apply Constructed Wetland Technology In Cold Climate
Authors: Liang Meng-Yuan , Han Yan-Cheng 
Published: December 2019

Abstract
Due to the influence of low temperature in winter, the removal effect of pollutants in constructed wetlands in winter is greatly reduced. In order to improve the removal effect of wetland on pollutants such as nitrogen and phosphorus, this paper proposes a new insulation method that uses the residual heat of bathroom bath waste water to supply heat to the constructed wetland. In the proposed new wetland system, the average removal rates of TN, TP and NH4
+-N in wetlands reached 61.09%, 85.03% and 33.85%, respectively. The application of residual heat energy to the construction of constructed wetland can realize the recovery and utilization of energy, which is conducive to the promotion and application of constructed wetland in the cold regions of the north.

A post-publication change was made to this article on 29 May 2020 to correct an author name on the webpage.
Investigating the Influencing Factors of Carbon Dioxide Emissions from Residents’ Energy Consumption in China
Authors: Wang Jingmin , Chen Keke , Song Xiaojing 
Published: December 2019

Abstract
With the rapid development of the social economy and the accelerated process of urbanization, the consumption level of residents, especially the demand of energy consumption has increased greatly, which will become an important reason for the growth of carbon dioxide emissions in the future. China has concentrated on policies and measures for energy conservation and emission reduction in the industrial and industrial sectors, ignoring the issue of carbon emissions in the residents’ consumption for a long time. This paper calculates the carbon dioxide emissions of residents’ energy consumption for 1991-2017 based on thirteen kinds of energy consumption. Then constructing the STIRPAT model to divide the influence factors into 5 factors: population, urbanization rate, GDP per capita, energy structure and energy intensity. This paper constructed the cointegration equation and the VEC model through the unit root test, Johansen cointegration test and Grainger causality test by Eviews8 software. Finally, this paper purposed the measures of reducing the carbon dioxide emissions of residents’ energy consumption by reducing the carbon dioxide emissions per capita and adjusting the energy structure.