bluuebunny/crossref_metadata_2025 huggingface dataset:
Boys like games and girls like movies
Authors: Muñoz Carmen
Published: April 2020

In many contexts learners are enriching their limited contact with the foreign language in the
classroom with unlimited contact outside the classroom thanks to the easy and immediate availability of the
Internet and digital media. This study aimed to document the characteristics of the contact with English that a large sample of
Catalan-Spanish learners have outside the classroom, to explore possible age- and gender-related differences, and to examine the
association between out-of-school contact and classroom grades. The responses to a survey showed the type of activities in which
young and old adolescents and young adults engage. The analyses showed differences between the three age groups, as well as large
differences in the choices of males and females. The analysis of the association between respondents’ English-classroom grades and
the different activities showed that reading had the highest positive correlation, followed by watching audiovisual material with
L2 subtitles.
Fiction – one register or two?
Authors: Egbert Jesse , Mahlberg Michaela
Published: April 2020

In this paper our focus is on analyzing register variation within fiction, rather than between fiction and other
registers. By working with subcorpora that separate text within and outside of quotation marks, we appromixate fictional speech
and narration. This enables us to identify and compare linguistic features with regard to different situational contexts in the
fictional world. We focus in particular on the novels of Charles Dickens and a reference corpus of other 19th-century fiction. Our
main method for the register analysis is Multi-dimensional Analysis (MDA) for which we draw on altogether four dimensions from two
previous MDAs. The linguistic distinctions we identify highlight similarities between fictional speech and involved registers such
as face-to-face communication, and between narration and more informational and narrative prose. In addition to the detailed
information on register features that characterize speech and narration, the paper raises more general questions about the ability
of register studies to deal with situational contexts within fiction.
Temporal-spatial Distribution Characteristics of Air Pollutants in the Pearl River Delta Region, China
Authors: Jiang Tao , Liu Zhaoyang , Wu Jianping , Zhao Wenpeng , Zhu Xunjiang
Published: April 2020

Studying the influences of meteorological factors on air pollutants (including SO2, NO2, O3 and PM10) and quantifying the relationships between them should enable further investigation on the variation of air pollutants in a region, especially their temporal-spatial distribution characteristics. We combined observed air pollutants data from ground-based monitoring sub-stations and relevant meteorological data in the Pearl River Delta region to investigate relationships between air pollutants and various meteorological factors, and then established regression models for each sub-station through principal component regression (PCR). According to these regression equations, the seasonal average temporal-spatial distribution of air pollutants is determined by inversion of the distance priority principle, and it provides strong support for the study of the spatial distribution and temporal variation of air pollutants in this region. Our conclusions are as follows: Different air pollutants have different spatial distribution characteristics with significant seasonal changes, and the concentration of each air pollutant in winter was higher than that in summer; PM10 levels in this region were higher than SO2, NO2 and O3.
Research on Forest Health Industry Planning Based on the Concept of Comprehensive Health —— Take Huinan County Forest Health Industry as An Example
Authors: Shi Yanlei , An Yonggang , Huo Pengfei
Published: April 2020

With the rapid development of economy and the rapid improvement of living standards, while people enjoy the fruits of modern civilization, some chronic diseases and sub-health problems emerge, which have seriously affected people’s health. The concept of comprehensive health is put forward under this situation. This paper takes Huinan County as an example to study comprehensive health theory. Integrating into the forest health industry, combining with the health resources and industry status, this paper studies the planning of the forest health industry in Huinan County.
An Analysis of Optimum Thickness of Inverted Filter Layer Made by Manufactured Sand
Authors: Shi Jianxun , Hu Lihang , Zhang Xingkai , Liang Jizong
Published: April 2020

The soil stability problem caused by seepage is a hot issue in geotechnical engineering, which is widely existed in natural and artificial slope, embankment, earth-rock dam and other projects. The traditional seepage calculation only considers the saturated seepage, ignoring the unsaturated seepage, and in the design of the filter layer, the thickness of the filter layer is mainly determined by experience. This study, for above problems, finite element numerical simulation method was used to simulate different thickness of filter layer, and seepage analysis in the unsaturated zone was carried out and obtained that 0.8m was the optimal thickness of filter layer in the calculation example; due to the siphon effect of matric suction, water flow also exists in the unsaturated area, and the infiltration line is not the uppermost line in the flow network; when the free water is a little lower than the height of the corewall, it will increase the seepage flow on the corewall of the dam, intensify the seepage contact and erosion, cause damage to the dam body.
Study on the Construction Technology of Visual Environment in Highway Tourism Service Area
Authors: Wang Dan
Published: April 2020

The integrated development of transportation and tourism has become a new trend in the transformation and development of the transportation industry. A series of policies issued from the central government to the local government have put forward corresponding requirements for the integrated development of transportation and tourism, the construction of tourism roads, and the upgrading of highway service facilities. As an important window of highway service for tourism, the construction of tourism service area needs to pay more attention to the spiritual needs of tourists and create a “tourist place” with a strong sense of belonging. In the environmental planning and design of tourism service area, the design concept of “place spirit” is presented, which makes the tourism service area have the dual characteristics of external form and place spirit. In the aspects of environmental coordination, space guidance, service function expansion, visual environment, etc., the construction of space environment of tourism service area is strengthened.
Emulation Software for Enterprise Network Data Collection at the Stage of DSS Development for EOR Implementation at Oilfields
Authors: Korovin Iakov S. , Tkachenko Maxim G.
Published: April 2020

Frequently, at the stage of decision support systems adaptation, oriented to real-time data analysis, coming from distributed systems of an enterprise computer network, connection between the DSS and working equipment is unavailable at early stages of software development. Such connection is usually available at final development stages after successful alpha testing on simulation models, confirming the declared operating parameters of software and hardware DSS complexes. For development, research and modeling of new approaches to data analysis, it is necessary to perform multiple starts of the system in conditions, close to the real ones. In the paper, we represent a method, which provides access to historical data of industrial equipment operating, using intermediate program layer. The layer simulates data input and allows the user to define the data load rate, equal to the same rate of real processes or several times exceeding it.
Fatigue Life Analysis of Key Equipment in High Temperature Reactor Considering Nuclear Irradiation
Authors: Qing Chen , Liu Jiangpeng , Gao Jianyong , Geng Jie
Published: April 2020

The key equipment of high-temperature gas-cooled reactors is always exposed to nuclear irradiation, while the influence of nuclear irradiation on equipment fatigue life is one of the targets to be studied. Based on the expansion mechanism of fatigue cracks of fracture mechanics, combined with actual material parameters, the critical parts of the equipment, the position and time of occurrence of the working tolerance limit are pre-critically analyzed, and the fatigue life model under the influence of nuclear irradiation are corrected to calculate the influence of nuclear radiation on fatigue life which has certain guiding significance for the estimation of fatigue life of key equipment in high temperature gas cooled reactor.
Statistical Analysis and Countermeasures of Major Power Customer Loss
Authors: Zhou Ying , Gong Feixiang , Li Qing , Li Shupeng , Huo Xianxu , Li Dezhi
Published: April 2020

This paper defines the loss of major power customer from the perspective of customer relationship management with a combination of qualitative analysis and quantitative analysis. The life cycle theory and risk management theory are used to analyze and discuss the factors of the loss of major power customers. The analysis model of major power customer loss based on evolutionary game is constructed, and empirical research is carried out by using the survey data. From the perspective of quantitative analysis, the method of variable selection and variable optimization selection for power customer churn early warning model is studied. Based on the comparative analysis of customer churn early warning model, a logistic regression based customer churn warning model is constructed. The effectiveness of the model is verified numerically with the survey data. Finally, the coping strategies such as differentiated service, organizational structure adaptability adjustment strategy and information system upgrade service are proposed.
Investigation on Erosion Resistance of Downhole Throttle with Ultra-high Pressure
Authors: Ma Huiyun , Jiang Yuan , Yin Qiang , Zhang Fangfang , Chen Shaowei , Lv Yanxin , Lei Guoping
Published: April 2020

The throttling nozzle, the core element of downhole throttling tool, is seriously eroded in the producing-sand gas well. In this paper, the fixed downhole throttle developed by Petro China Southwest Oil and Gasfield Company is taken as the research object, and the flow state of gas and the movement of sand particles are expressed by RNG k – ε model and DPM model respectively. Through Fluent numerical simulation, the internal flow field distribution rule of throttle with diameter of 70mm is discussed, the most serious erosion area of throttle is obtained, and the influence of solid particle velocity, solid particle diameter and solid particle mass flow rate on the erosion of throttle are analyzed. It is meaningful to design and improve throttle according to working parameters of gas well. According to the simulation, it is believed that the fixed downhole throttle will contribute to a better understanding for erosion resistance of downhole throttle with ultra-high pressure.
Optimization Design and Numerical Investigation on Ball Valve of High Pressure Coal Slurry Pump
Authors: Yuan Chenyan , Yu Heng , Cao Yang , Chen Songying
Published: April 2020

The charging flow rate fluctuation of the coal slurry pump was caused by the ball valve. In this study, the reconstruction was established to increase the circulation area surrounding the valve ball, the valve limiter was redesigned. The numerical simulation of the structure and performance of the ball valve is carried out with the new limiter structure, getting the flow resistance and the operational parameters The simulation results showed that the new limiter can effectively eliminate the flow fluctuation caused by the old limiter, the reform was successful to bring huge economic benefits to the plant.
Controllable Growth of Bilayer MoS2 Crystals by Reverse-Flow Chemical Vapor Deposition
Authors: Wang Siyuan , Wang Guang , Peng Gang , Li Zheng
Published: April 2020

Molybdenum disulfide (MoS2) is a two-dimensional (2D) semiconductor, which shows potential applications in catalysis, optoelectronics and electronics. The stacking order in layered materials induces different performances in interlayer couplings and electronic devices. Therefore, controlling the stacking orientations is necessary but remains a significant challenge. Here uniform and high-quality bilayer MoS2 flakes (AA/AB) have been synthesized by reverse-flow chemical vapor deposition (CVD), through controlling growth temperatures. 770 °C is suitable for the growth of AA stacking and AB stacking prefers higher temperature at 820 °C. The reverse-flow helps to generate bilayer MoS2 with few nucleation points and the general method for the synthesis of bilayer MoS2 in different stacking orientations paves a way for development of 2D semiconductor applications.
Preparation and Damping Properties of Simethicone PU Microsphere
Authors: Liu Jun , Tang Cong , Kaid Tammam , Zhuo Yuguo , Wang Li , Ren James
Published: April 2020

Microspheres are an important material group with increased uses in mechanical, civil and environmental engineering. The microspheres with polyurethane as the wall material and dimethyl silicone oil as the core material were successfully prepared by interfacial polymerization method, which was incorporated into epoxy resin to enhance the damping properties. The new material was characterized by scanning electron microscopy and infrared spectroscopy. Results show that the microspheres had good sphericity and smooth surface. Dynamic mechanical thermal analysis showed that the incorporation of microspheres can elevate the damping performance of the epoxy resin.
Analysis of the conventional vacuum preloading method
Authors: Liu Wenbin
Published: April 2020

The conventional vacuum prepressing method is to reinforce the soft soil foundation. The process is to lay a certain height of horizontal sand cushion layer on the surface to form a horizontal drainage channel, and then set up a plastic drainage plate and connect it with a pumping pipe to form a vertical drainage channel. This paper analysed the conventional vacuum preloading method with in-site test method, and the foundation reinforce effect was evaluated by monitoring the surface settlement, variation of pore pressure and layered settlement.
Reliability Analysis of Bearing Capacity of Pile Foundation of Continuous Rigid Frame Bridge During Construction
Authors: Li Qingfu , Jing Lan , Wang Shuangxian
Published: April 2020

As the basis of the entire bridge project, bridge pile foundation is highly related to the safety and durability of the bridge especially in construction quality. In this thesis, the reliability of pile foundation bearing capacity of a super-large bridge under construction was analyzed. Besides the reliability index was calculated. The key factors controlling the construction quality of pile foundation were found to guide the actual project construction.
An effective detection method based on the biological acoustic characteristics of the outlet of nuclear power plant
Authors: Zhang Jianfei , Zhang Shisong , An Chong , Luan Yuanling , Li Wenzhi
Published: April 2020

In order to improve the reliability of nuclear power plant cold source, it is necessary to establish a defense system in depth of marine biology, identification, detection, early warning and hierarchical response. Among them, detection and early warning is a front-end disposal measure, which can provide accurate and timely marine biological information for the follow-up hierarchical response. At the same time, it can replace the underwater inspection of divers and reduce the risk of industrial safety. In this paper, the underwater acoustic high-resolution multi beam detection method is used to detect marine creatures such as jellyfish, and its echo characteristics are obtained. The distribution density and body scattering intensity characteristics of jellyfish in sensitive sea areas are analyzed. The results show that the high-resolution multi beam acoustic method is effective for detecting marine creatures at the outlet of nuclear power plant.
Civil Engineering Management Level Improvement Strategy Based on Information Construction
Authors: Chunyao Deng
Published: April 2020

In the information age of the 21st century, the traditional management model has been unable to effectively improve the efficiency of civil engineering management. To this end, it is necessary to fully utilize information technology to promote the organic combination of information construction and civil engineering management, and fully realize the civil engineering construction design. This paper will discuss the strategy of civil engineering management level improvement based on information construction, and hope to provide reference and reference for civil engineering construction.
The Typical Case Analysis of Special Ultra-high-rise Building
Authors: Jiang Bin , Wang Jin , Li Qinwu , Zhu Yan , Sang Shichen , Xu Jian
Published: April 2020

Based on the definition of “ultra-high-rise building” in the world, this paper first puts forward the definition of “special ultra-high-rise building”, and then the data of 28 typical special ultra-high-rise buildings (including some 300m∼400m representative ultra-high-rise buildings) which have been built in the world is collected. Through statistical analysis of the data regarding the structure form, the overall and core tube height-width ratio, the facade change and foundation, this paper draws some regularity results: (1) the overall and core tube height-width ratio is not closely related to the building height;(2) the elevation change should be simple, regular, tapered and continuous;(3) the 7 main structure types are ranked according to the using height;(4)the suggested raft thickness is given by its relationship to the total storeys.
Study on the influence of horizontal freezing and melting of complex curtain on surrounding environment
Authors: Yu Changyi
Published: April 2020

In this paper, the 3-D finite element model is used to systematically analyze the displacement field of artificial frozen soil thawing settlement. During the simulation process, the thermophysical parameters change with temperature, such as elastic modulus, density, specific heat and other parameters change with temperature. When calculating the temperature field of melting and settling, the temperature field on which the mechanical parameters are based is given point by point through the field variables. After changing with time, the temperature field changes with the points, and the mechanical parameters also change point by point. To ensure that the simulated melting and settling calculation process is more in line with the actual project. The calculation results of melting and sinking show that the whole displacement field presents nonlinear changes with time and space. The research results of this paper provide reference for the control measures of melting and settling.
A new computational method for transversely isotropic elastic boundary conditions
Authors: Zhang WX , Yang LM
Published: April 2020

Since the transversely isotropic elastic materials have been widely used in the fields of architecture, aviation and so on, the related mechanical calculation has become an important research topic. One of the most commonly used method is the semi inverse method with displacement or stress as the basic variable. However, this method can not describe the local deformation. In this paper, based on the variational principle and the method of separating variables, the basic equations of symplectic system are established. According to the characteristics of Hamiltonian matrix operators, all analytical solutions of transversely isotropic elastic plane are found, and a complete solution space is established. In the example, the boundary problem is studied, and the first five non-zero eigenvalue are obtained.
Numerical computation on the scattering sound field distribution of rigid sphere in shallow water waveguide
Authors: Jihui Wang , Guijuan Li , Bing Jia , Zhenshan Wang , Rui Wang
Published: April 2020

Numerical computational model about the scattering fields of rigid sphere in shallow water waveguide is accomplished using boundary element method and normal mode model. A kind of modified CHIEF boundary element method is used to solve the non-uniqueness problem at characteristic frequency for exterior sound field computation. The green function for shallow water waveguide acoustic wave propagation is modified based on the normal mode model. The acoustic pressure in the far field yields Kirchhoff Helmholtz equation and the scattering sound field distribution of rigid sphere in a Pekeris waveguide is achieved. Also the scattering sound field distribution of rigid sphere in the free field is calculated. The results indicate that the waveguide influences the sound propagation, and it need to pay attention during the test.
Research on Quality Evaluation Method of TRD Cement-soil Continuous Wall Based on Analytic Hierarchy Process
Authors: Ju Song , Liu Yankai , Dong Zhanwu , Gui Dazhuang
Published: April 2020

In order to accurately evaluate the wall quality of cement-soil mixing wall by TRD method and reduce the risk of foundation pit excavation, this paper proposes a comprehensive evaluation method of wall quality. Based on strength analysis, impermeability analysis, borehole TV analysis and electromagnetic borehole radar analysis, the main influencing factors of TRD cement soil wall quality are analyzed and determined. Using the analytic hierarchy process, the hierarchical structure model of the wall quality evaluation index system is established and the evaluation factors are quantified. The fuzzy comprehensive evaluation method is used to evaluate the index factors. By analyzing the evaluation results, the evaluation grade standards of excellent, good, medium and poor reflecting the wall quality are established. The evaluation system and grade standard are used to evaluate the wall quality of waterproof curtain in a station foundation pit of Qingdao metro. The actual excavation of the foundation pit is basically consistent with the evaluation results. It has preliminarily realized a change from qualitative and empirical to scientific and half quantitative. The research results can be promoted and applied to the similar TRD cement soil mixing wall project in the future.
Study on How to Improve Surface Water Quality Monitoring
Authors: Chen Dongxu , Liu Hua , Cai Erjian , Wu Hui
Published: April 2020

Under the guidance of the Party Central Committee and the State Council, China’s environmental protection initiatives have made remarkable achievements, both in terms of system optimization and in terms of solving problems left by history. The masses also put forward suggestions and opinions on the achievements of China’s environmental protection departments, and the public awareness of environmental protection has been constantly enhanced. In this context, more and more enterprises and individuals begin to pay attention to the changes in environmental quality. Surface water quality monitoring, as an important task to clarify the environmental quality of surface water, provides a wealth of information for the relevant technical personnel to clarify the change of environmental quality. Therefore, in the process of design and production, our environmental protection personnel and other industry engineers will put forward the requirements for quality monitoring of surface water where the project is located, and different industries have different requirements for their testing accuracy. It can be seen that improving surface water quality monitoring has become an urgent task for environmental protection engineers.
Research of friction loss for setting slurry flow in inclined pipe
Authors: Tieli Wang
Published: April 2020

By analyzing the momentum transfer and velocity both of solid particles and water over the acceleration time of solid particles, and interplay mechanism of water and solid particles, a new model is proposed to predict friction loss for setting slurry flow in inclined pipe. Based on the experimental data of some scholars, the hydraulic gradient formulas of the author and other inclined pipelines are verified. The results show that the deviation between the theoretical and measured values of the model proposed by the author is the smallest, not more than 13.33%. At last the causes of error is analysed.
Dynamic Analysis of Influence of Soil Damping Nonlinearity on Foundation Stability
Authors: Yihe Yin , Xin Tian , Lama MILAN , Zhiying Zhang
Published: April 2020

Aiming at the sliding instability problem of foundation-based system under the action of earthquake and other dynamics, nonlinear cusp catastrophe analysis model which conforms the actual working behavior of foundation-based system is established by using the catastrophe theory. It describes the whole process of catastrophic instability of the system and analyze the basic stability. Based on the research of many nonlinear factors contained in the system that has been considered so far, the inherent influence of the nonlinear factors of soil damping in the actual working environment is considered and analyzed for the first time. Under the linear, quadratic and cubic nonlinear conditions, the most general expression of soil damping reflecting the system’s instability and catastrophe of the system bifurcation set is derived. The results show that the nonlinear characteristics of damping directly affect the correct evaluation of the ultimate bearing capacity of the foundation. Although ignoring the nonlinear influence of damping will not change its catastrophic properties, but will underestimate the ultimate bearing capacity of the foundation.
Study on the blast resistance of concrete beams reinforced with ultra-high-molecular-weight polyethylene (UHMWPE) fibers
Authors: Zhang Zhao , Yan Luhui , He Zhiyang , Ma Jiajun , Wang Huiming
Published: April 2020

Experiments and numerical simulations were performed to investigate the blast resistance of concrete beams reinforced with ultra-high-molecular-weight polyethylene (UHMWPE) fibers under close-in blast loads. The blast tests were carried out on fiber- reinforced concrete beams with a volume content of 0.7% at three scaled distances (i.e., 0.36, 0.40, and 0.47 m/kg1/3) and the damage results were compared with the characteristics of normal reinforced concrete beams. The results show that the UHMWPE fibers can decrease the damage degree of the beams, hinder the generation and development of cracks, and prevent spalling on the back surface, indicating that the blast resistance of UHMWPE-fiber-reinforced concrete beams is better than that of normal reinforced concrete beams with the same strength grade. Due to the addition of fibers, the improvement in the damage resistance to blast loads at the bottom surface of the beam is better than that at the top surface. A 3D blast-test model was established and calculated using the LS-DYNA software. A numerical study of the extended scaled distances was carried out to determine the change law of the damage features based on it. When the scaled distance is greater than 0.41 kg/m1/3, the damage mode of the beam begins to change from the mode of large damage at the bottom and small damage at the top to the mode involving large damage at the top and small damage at the bottom.
Experimental study on Shear behaviors of RC beams strengthened with ECC layers
Authors: Wang Guan , Zhu Fawang , Yang Caiqian
Published: April 2020

The experimental study on shear behaviors of reinforced concrete (RC) beams externally strengthened with Engineered Cementitious Composite (ECC) layers were conducted and analyzed. The RC beams were designed and fabricated without stirrups. ECC was sprayed onto the sides of the beams to the designed thicknesses which were 20 mm, and 40 mm. A series of four-point bending experiments were performed to study and analyze the shear behavior of the specimens. The thickness of ECC layers and shear span-to-depth ratios were considered and analyzed. It is an effective way for the shear strengthening of RC beams with ECC layers. The ECC layers’ thickness should be restricted to override the debonding between ECC layers and RC beam or to strengthen an RC beam into an under reinforced one. Fibre Bragg Grating sensors can be used to measure the development of shear strain of the strengthened specimens.
Improvement technology research on red clay of Yuzhan expressway
Authors: Zhang Jiaying
Published: April 2020

There is a lot of red clay along the Yuzhan expressway. In order to use local materials, improve the efficiency of economy and protect the environment, it is proposed to use red clay of Guangxi as roadbed material. Through the experiments, the influence of different mix amount of sand and lime on red clay properties, feasibility of soil improvement is demonstrated and the influence regularities of strength index are analyzed. The results provide important reference for design and construction of expressway.
Study of factors affecting bond behavior between stainless steel rebar and concrete
Authors: Li Qingfu , Xiang Qunhua , Wang Jinwei , Lei Jia
Published: April 2020

With the improvement of smelting process of stainless steel, stainless steel has great advantages in economy, rigidity and durability, so it has been widely used in recent years. However, the properties of stainless steel rebar are very different from those of traditional steel rebar. The stainless steel rebar has no obvious yield strength, and its ductility is excellent. It is essential to determine whether stainless steel rebar can be used in building structures. The bond behavior between stainless rebar and concrete is the basic issue to study before the application of stainless steel. Therefore, the effects of concrete strength, diameter of reinforcement, relative thickness of protective layer, anchorage length of stainless steel bar and casting method on the bond force between the stainless steel bar and concrete were analyzed through central pulling tests of 39 specimens. The results showed that the stainless steel rebar has high bond force with concrete and the empirical formula of bond force between stainless steel rebar and concrete was established based on the regression analysis of the experimental data.
Research on Improvement of Red Clay in a Highway Engineering
Authors: Fu Jianbao
Published: April 2020

Red clay generally has a high liquid limit and is easy to shrink due to water loss. It is easy to cause some engineering accidents. If red clay is used as subgrade filler, it must be studied. This paper studied the red clay properties of a highway in southwest China and improved the red clay by adding quicklime. Research results show that the red clay is high liquid limit soil and the CBR does not meet the specification requirement. It can’t be directly used as filler for highway. After improved by adding quicklime, the red clay changed from high liquid limit soil to non-high liquid limit soil and the CBR increased rapidly. In the supporting project, red clay was improved by adding 5% quicklime. Then the liquid limit and CBR of the modified red clay meet the specification requirements. And the red clay’s water loss cracking has also been greatly improved.
Characteristics and development trend of secondary geological disasters caused by earthquakes
Authors: Zhou ChangXian , Zheng ShaoPeng , Ye YouQuan , Wang Hao , Fu Ping
Published: April 2020

the secondary geological disasters caused by earthquakes are the most developed, the largest in scale and the most destructive.

Based on the large earthquakes in the world in recent years, the secondary geological disasters caused by earthquakes and their damages are analyzed

At the same time, the development trend of geological hazards in the future is predicted.
Study on the buried oyster reefs and environmental changes with the underlying muddy sediments on the Northwest Coast of Bohai Bay
Authors: Jing Fang , Fu Wang , Liping Zhang , Shuo Yang , Tianjiao Wang , Yufei Liu , Yang Li
Published: April 2020

The Electric Conductivity of Stirred Clayey sediments into Water (EC), pH values and micropalaeontological studies of the underlying muddy sediments of the buried oyster reefs in Dawuzhuang and Airport sites, northwest coastal plain of Bohai Bay revealed a difference of the depositional environments of the underlying mud units in two sites. In Dawuzhuang, from the underlying to the overlying muds, environment changed from subtidal to the lower intertidal zone, which presented a falling tendency of relative sea level. However, the underlying mud in Airport site occurred in the intertidal and changed upwards to the reef body as being lagoonal environment. These indicate that the relative sea level fall resulted in intertidal environment in Dawuzhuang and a change from the open intertidal to relatively isolated intertidal lagoon environment in Airport site as a diatom thriving as well during the mid-Holocene all form the important reasons for the oyster reef development.
Brief Analysis of the Application and Limitation of BIM in Project Life Cycle Management
Authors: Li Yangliang
Published: April 2020

BIM (building information model) with its advantages of information integration and excellent visualization effect has created considerable economic benefits and significantly improved work efficiency in construction practice. Although BIM is widely regarded as the future of China's construction industry, there are many obstacles to its application in China. This paper briefly analyzes the application status and main obstacles of BIM in China. At the end of the paper, the author provides some suggestions from different aspects.
Application of In-situ Cold Recycled Subbase in Highway Maintenance in Loess Area
Authors: Liu Liping , Liu Wanfeng , Yang Yang , Guo Jianbo , Bao Caixia
Published: April 2020

This paper studies the application of the in-situ cold recycled subbase technology of the asphalt pavement with using cement as an additive. From the two aspects of analysis and practical application, the construction process of in-situ cold recycling of asphalt pavement is studied specifically. Moreover, combined with the engineering practice, and through the introduction of the cold recycled construction process and the analysis of the test results, this paper expounds the specific construction process of the cold recycled subbase, and points out the existing problems and matters needing attention in the project construction.
Evaluation Method and Practical Application Research of Green Building Energy-saving Design Scheme
Authors: Ying Guo
Published: April 2020

In order to achieve sustainable development of the construction industry, green building has become a major development direction in architectural design. At the same time, in order to ensure that the green building design can achieve the desired energy-saving effect, it is necessary to adopt a scientific evaluation method to comprehensively analyze and evaluate the green energy-saving design. The fundamental purpose of green building energy-saving design and evaluation of its design scheme is to be applied in the construction project. Therefore, it is necessary to fully understand the evaluation methods and evaluation criteria of green building energy-saving design, and also apply these methods to engineering. The design and construction of the project will promote the development of China’s construction industry towards green and low carbon.
A bird's eye of Prefabricated Construction based on bibliometric analysis from 2010 to 2019
Authors: Huang Yunping , Yan Jinjiang , Chen Lingling
Published: April 2020

Prefabricated construction (PC) is an effective way to sovle the unsustainable issues caused by conventional construction methods. To analyse the status and frontier dynamics of PC, this paper provides a bibliometric analysis of 1162 papers on PC publications from the Web of Science (WoS) database for the 2010-2019 period. In the paper, we firstly investigate the publication and citation structure of PC, then co-authorship network of countries/regions and institutes are detected as well. Finally, cited sources and research topics are explored by conducting co-citation network and co-occurrence network, respectively. This paper provides useful and new insights to summarize the progress of PC in a bird’s eye and brings a reference to the future development of PC.
Key Elements of Building Information Modeling Technology (BIM) and Green Building Design
Authors: Zhangqi
Published: April 2020

In order to promote the smooth transformation and transformation of China’s construction industry and achieve sustainable development, green building design has become one of the main development trends of architectural design. Designers should enhance their awareness of energy conservation and environmental protection, actively apply advanced technical methods, optimize design solutions, and improve the energy saving and consumption reduction effects of architectural design. BIM building information modeling technology can highly integrate a variety of building information through 3D modeling, providing technical support for green building design because of its good visibility and intuitiveness.
Study On Site Selection of Service Facilities For Tourist Highway Campsites: A Case Study of Songhua Lake Area in Jilin Province
Authors: Xiaoyun QIU , Longhai YANG , Gang WANG , Bin TIAN
Published: April 2020

The rapid rise of campsites tourism mode leads to the increasingly obvious problem of site selection for existing tourist highway campsites. According to the characteristics of service facilities of China’s tourist highway campsites, this paper adopt the centre-of-gravity method and AHP method to carry out site selection planning. This paper first define the concept of service facilities of tourist highway campsites and summarize the influencing factors and principles of site selection of tourist highway campsites. Then, a simple and effective method combining the centre-of-gravity method and AHP method for site selection of tourist highway campsites is proposed. The primary site selection of campsites is based on the centre-of-gravity method. Finally, taking the Songhua Lake area of Jilin province as an example. This paper calculates the site selection of tourist highway campsites, further validates the feasibility of the site selection method, and provides theoretical support and reference method for the site selection of tourist highway campsites in the future.
Study on Establishing Safety Standard System for Water Transport Engineering
Authors: Zhang Shijie , Li Yan , He Zhi , Xu Jinghan , Deng Di
Published: April 2020

Based on the present situation of safety standards for water transportation engineering in China, this paper comprehensively compares the advantages and disadvantages of domestic and foreign standards and standards system, and studies and builds the framework diagram of safety standards for water transportation engineering. Get to know and sort out the safety production standards for water transportation projects that have been issued in China. It discusses the new situation of the development of safe production in China, and the requirements of safety standards, safety standardization and safety standard system in the water transportation industry. The comparative study of water transport engineering standards and standards system at home and abroad is carried out. According to the requirements of relevant standards, this paper discusses the construction of the safety standard architecture of water transportation engineering, studies and proposes the safety standard architecture of water transportation engineering, which is composed of three dimensions: the type of water transportation engineering, the stages of the whole life cycle of the engineering, and the content involved in safety production, and analyzes the advantages of this architecture. This paper provides basic research for establishing the safety standard system table of water transportation engineering. The research results are of great significance to promote the establishment and perfection of the safety professional standard system, and to promote the construction of safety standardization in water transportation and port industry.
Application of 3D Laser Scanning Technology in Simulating Dam-Breaking Flood Routing
Authors: Fangjin Xiong , Shaobing Wang , Minlin Yu
Published: April 2020

3D laser scanning technology (3D-LST) is a new measuring technology that has been developed rapidly in recent years, which is characterized by obtaining 3D space coordinates of the object surface with its high speed, high accuracy and high density and the object and without contacting with the measured object. It has been increasingly and extensively applied in a variety of fields of engineering^. In this paper, the analysis of 3D-LST in the dam-breaking flood routing analysis and its application in emergency rescue has been discussed. And then, a dam breaking and flood routing model has been established through scanning the dam and its downstream terrain with a 3D laser scanner, so as to provide accurate data basis for dam relief and disaster relief.
Study on the Design of Slow Travel System of Tourist Highway Service Facilities
Authors: Zhang Xiqiao , Luo Yule , Wang Gang , Tian Bing
Published: April 2020

As an important carrier of tourism development, tourism highway also develops rapidly, and the construction of service facilities also rises gradually. The research on the slow travel system of tourism highway service facilities will help to achieve the coordinated development of eco-tourism and green development. Based on the concept of tourism highway service facilities, this paper defines and classifies the slow traffic system of tourism highway service facilities, and studies the slow traffic system of tourism highway service facilities from three aspects of slow traffic line design, safety facilities design and sign system design, and puts forward relevant design suggestions. Finally, through the field investigation of Yanming Lake Wetland Park in Jilin province, the slow system design is carried out, and the overall design drawing is proposed. Through the analysis and research of this paper, it can improve Chinese design system of slow traffic under the service facilities of tourism highway, and has the corresponding guiding role for the design of different slow traffic systems.
Emission Reduction Policy for Construction Supply Chain with Mix Financing and Cap-and-trade
Authors: Jiang Wen , Zhang Li , Liu Menglin
Published: April 2020

Under the cap-and-trade and the incentive of emission reduction bonus, we investigated a two-stage construction supply chain consisting of a subcontractor with capital constraints and a general contractor. Firstly, this paper constructed a decision model of emission reduction considering both internal financing and external financing (i.e. mix financing). Secondly, the optimal decisions and maximum profit of both parties are obtained. In addition, this study also showed that the total amount of emission reduction of the general contractor increases in carbon trading price; the total amount of emission reduction of the subcontractor increases in carbon trading price and decreases in external financing interest rate; the optimal proportion of internal financing increases in internal financing interest rate while decreases in external financing interest rate.
Brief Analysis on the Design Points of the Site Selection for the Relocation of Airports in the Branch Line—Taking the Relocation of Nanyang Airport as an Example
Authors: Ruifang Su , Rui Sun
Published: April 2020

With the continuous enhancement of state support, China’s civil aviation has ushered in an unprecedented period of development. At the same time, along with the continuous expansion of urban construction land and the large number of new urban infrastructure building, the existing land use of regional airports in some small and medium-sized cities in China has contradicted the urban development direction and non-airport infrastructure construction. The more cities began to relocate the existing regional airports. Taking the Nanyang Airport relocation project as an example, this paper starts from the four aspects which are civil aviation status and development constraints, the influencing factors and necessity analysis of airport relocation, civil aviation development prospects and scale prediction, and the factors affecting the site selection of airport relocation. Based on the above analysis, we propose the basic framework, research methods and implementation strategies for the location of the relocation of the regional airport, which are expected to provide a reference for the relocation of other regional airports.
Study on Optimization of International Intermodal Container Route Selection -A Case of Zhengzhou Railway Bureau
Authors: Teng Shiyao , Tang Jinjin
Published: April 2020

In view of the fact that international container intermodal transportation has become an indispensable mode of transportation for the exchange of China and surrounding countries, the paper studies the transportation network formed by Zhengzhou Railway Bureau and surrounding container node cities with the transportation costs and transportation time as the research direction, and constructs a multi-objective optimization model for the optimization of the mode and route of international container transportation between Zhengzhou Railway Bureau and Europe. And the genetic algorithm is used to solve the optimal solution under different weights. The case shows that the model is effective and feasible in practice, and can provide a more effective guiding optimization plan for the selection of international intermodal container routes of Zhengzhou Railway Bureau.
The application of urban rail transit station connection guidelines in mountain city pedestrian transfer
Authors: Li Xiao , Leng Haiyang , Tian Kai
Published: April 2020

Rail transit takes the advantage of large volume and fast speed as the first choice for many people to travel, and the way of pedestrian transfer is the preferred way for residents of mountainous cities. Compared with plain cities, the sharing rate of pedestrian transfer in mountainous cities is higher. However, due to the large vertical elevation difference in most mountainous cities and the urban characteristics of group development, there are problems of poor connectivity of pedestrian network, inadequate interchange crossing facilities and large bypass distance in the pedestrian transfer in mountainous cities, which causes potential safety hazards and inadequate convenience for pedestrians to travel. By redefining the actual transfer distance and the planning and design scope, this paper analyses the pedestrian transfer characteristics of mountainous cities from a psychological point of view. Taking Chongqing as a typical mountainous city as an example, based on the newly issued Guidelines for Connecting Rail Transit in Chongqing, the application of the Guidelines in actual projects is analysed to prove the generalization of the Guidelines.