bluuebunny/crossref_metadata_2025 huggingface dataset:
A new approach to identify the target market of new gateway airports
Authors: Wang Zheqing , Lu Jing , Cheng Lv
Published: December 2019

Benefiting from the Belt and Road initiative, China experiences the flourishing cross-border trading and tourism. Meanwhile, explosive air transport demand arises in Chinese Bay Area as its strategic position on the Belt and Road. As an important infrastructure in Chinese Bay Area, Hong Kong-Zhuhai-Macao Bridge has connected Zhuhai airport and Hong Kong airport. As a result, we firstly propose a new international transfer mode called “air-bus-air”. In order to identify the target market of “air-bus-air”, a path choice model is established integrating multinomial logit model and latent class model and validated by path choice data. Test results indicate that a latent class model with three segments performs best and this method is effective in improving the accuracy of market segmentation.
Pricing Competition for Ocean Transportation with Heterogeneous Carriers and Empty Container Repositioning
Authors: Yu Mingzhu , Qv Jiayin , Yi Zelong , Yang Ruina
Published: December 2019

In this paper, we study the pricing competition in an ocean transportation system involving two heterogeneous ocean carriers who provide ocean container transportation services between two sea ports. The empty container repositioning issue and Hotelling demand model are emphasized. We model this problem as a pricing game and derive the pricing equilibria of the two ocean carriers under both homogeneous and heterogeneous conditions. We fully characterize the impacts of empty container imbalance degree and various parameters. The computational studies reveal that the developed carrier (the one with lower operation costs) in the system bears more empty container repositioning than the developing carrier when the trade imbalance intensifies. The intensification of carrier difference will increase the two carriers’ total profit.
Calibration Method for Microscopic Simulation Model of Urban Expressway Using Internet Traffic Operation Data
Authors: Wang Bo , Gu Jingang
Published: December 2019

To develop a calibration method for microscopic simulation model of urban expressway using internet traffic operation data, a practical calibration process is proposed in this study. In this process, a sensitivity analysis was conducted to detect those parameters that impose the most influence on simulation model. Then the Latin Hypercube Sampling Method is used to generate workable amount of parameter sets for simulation run. The parameter set that produces the least discrepancy between the simulation model and the actual condition would be the calibrated parameter values. To demonstrate the feasibility of the proposed method, an example of the Inner Loop Expressway network in Wuxi City is modelled and calibrated using VISSIM. After calibration, the simulation model can accurately represent real-world condition.
Dynamic Selection of D2D Communication for Internet of Vehicles
Authors: Wang H L , Qiu G A , Bao Z H , Wang W
Published: December 2019

Vehicle communication technology, as the core technology of intelligent transportation system, is expected to pass various communication connection means, combined with artificial intelligence, situational awareness, monitoring device, and precise positioning system, to solve the demand of the intelligent transportation system in the car safety, transportation efficiency, and the information service, etc. And it has the potential to serve driverless system. Device-to-device(D2D) communication is suitable for short distance vehicle communication because of its related characteristics and advantages. D2D users multiplexing cellular network spectrum will bring the same frequency interference problems. In order to avoid interference, improve system performance, this paper proposes a vehicle networking D2D communication mode based on spectrum sensing dynamic selection method. Simulation results show that the system capacity can be maximized by changing the sensing time of spectrum. Dynamic selection model is verified through the comparison superiority, and provides the intelligent transportation system a better vehicle-to-vehicle communication method.
Orthogonal Testing on Ratio of Physical Simulation Material Similar to Sandstone
Authors: Zhang Yanli , Wu Yongping , Xie Panshi
Published: December 2019

In this paper, the ratio of physical simulation material similar to sandstone was studied through orthogonal testing, which was made up of five levels and four factors (sand-cement ratio, cement ratio, molding loading rate and molding pressure). Physical and mechanical parameters including density, uniaxial compressive strength, elastic modulus and tensile strength of the physical simulation material were obtained by the testing. The key influencing factors and variation rules of physical and mechanical properties of the material were analyzed by range analysis method. The results show that the factors affecting density from large to small are: molding pressure, sand-cement ratio, cement ratio and molding loading rate. The density increases with the increment of both molding pressure and sand-cement ratio. However, the density value decreases slowly with the increment of loading rate, and it does not change significantly with the increment of cement ratio. Uniaxial compressive strength (UCS) is influenced by factors including sand-cement ratio, molding pressure, cement ratio and loading rate. The UCS decreases with the increment of both sand-cement ratio and loading rate, and increase with the increment of cement ratio and molding pressure. Both elastic modulus and tensile strength are influenced by sand-cement ratio, cement ratio, molding pressure and loading rate, too. The elastic modulus and tensile strength decrease with the increment of sand-cement ratio and loading rate, and increase with the increment of cement ratio. Meanwhile, they increase slowly with the increment of molding pressure. The linear regression equations between all considering factors are obtained through the testing, which provide scientific basis for the reasonable selection of the material ratio in the physical simulation experiment.
Improving deterministic pitch motions estimation using bivariate sequential wave input
Authors: Liu Yucheng , Zheng Qiumeng , Duan Wenyang , Huang Limin
Published: December 2019

As the ship navigates through waves, it will sway continuously with six degrees of freedom, which will adversely affect the offshore operations. Accurate real-time estimation of deterministic ship motions under wave excitation is a key to ship motion prediction and assistance decision-making. In the actual marine environment, ocean waves and ship motions are often nonlinear. Therefore, an effective nonlinear estimation model to accurately estimate the real-time response of the wave-induced ship motions is of great concern. Due to its unique advantages in dealing with nonlinear time series, Long Short-Term Memory network can provide a powerful method for the estimation of nonlinear wave-induced ship motions. Pitch motions as an oscillating motion put forward higher requirements for model input. Based on the Long Short-Term Memory network model using the wave time history information as input to estimate the ship pitch motion, this paper proposes a pitch estimation model received a bivariate sequential wave time series as input. With the use of the nonlinear wave generated by numerical simulation and the corresponding ship motion time history data, the feasibility of the new model is verified and compared with the corresponding single-point sequential wave input model, determined its superiority.
Parameter Correction of VISSIM Multi-intersection Simulation Model Based on Combined Genetic Algorithm
Authors: Zhang Jing , Lin Zhang , Wang Changwei
Published: December 2019

In the field of traffic simulation research, the requirements of microscopic traffic simulation model accuracy and intersection popularity are getting higher and higher. Aiming at the shortcomings of traditional genetic algorithm, such as slow speed, huge time-consuming and easy to fall into local optimum, a parameter correction algorithm for VISSIM simulation model based on combined genetic algorithm is proposed in this paper. Neural network is used to predict and analyze, and genetic algorithm with partitioning operator is used to correct the parameters, and the error of simulation delay and measured delay is designed as the objective function. Finally, taking three typical continuous intersections of a main line as an example, a microscopic traffic simulation model is established and the parameters are corrected. It is showed by the results that the corrected error is as low as 9.63%, which proves that the proposed method is feasible and robust.
Research on Assembly Sequence Planning of Marine Diesel Engine Based on Improved Genetic Algorithm
Authors: Wei Wang , Zhang Xinyu , Zhang Wenping , Shang Zhaobin
Published: December 2019

That genetic algorithm is applied to the assembly sequence planning of marine diesel engine can improve assembly planning efficiency a lot. The genetic algorithm crossover operator of genetic algorithm is improved. By combining the clashes matrix and priority relationship matrix, the relational-clashes matrix is established. In order to get the assembly sequence which can assembly safely and effectively, but conform to the actual assembly habits as well, the fitness function combines the feasibility of assembly sequence, the rationality of assembly sequence and the number of redirection. The evaluation method based on the general principle of assembly sequence was proposed for the first time. Priority of parts is evaluated according to their barycentric coordinates and precision level. The evaluation method can enrich the evaluation method of assembly sequences and expand the application of intelligent algorithms in the field. After some tests and analysis of the experimental results, the algorithm proved to be convergent and the results are effective.
Simulation research on measurement method of geometric parameters of non-contact pipe thread
Authors: Liu Yanshu , Li Wenjie , Song Ziyang , Li Zhong
Published: December 2019

In order to ensure that the pipe thread exerts its good sealing and transmission performance in the oil and gas pipeline, it is essential to judge the geometric parameters of the pipe thread. The experiment uses the 60° standard sealed pipe thread of model NPT1/2 as the research target, the machine vision technology is used to make non-contact measurement of the pipe thread geometry, LABVIEW is used as the software development platform to analyse the processed thread image. Finally, the parameters such as pitch, thread angle, taper, and thread height are simulated and measured to obtain the qualification conclusion.
Micromechanics Analysis of Elastic Properties of Flexible Matrix TWF Composites
Authors: Li Yichen , Song Yanping , Hu Fei
Published: December 2019

Using carbon fibers triaxial woven fabric (TWF) as a reinforcing material and compounding with a suitable flexible matrix material to form a composite shell film structure. It is a new type of high precision deployable antenna implementation. In this paper, the elastic properties of TWF composites using silicone rubber are studied. Using the micromechanics method, the three-dimensional unit cell characterizing the structural properties of the braided composite material is carried out. Homogenization finite element analysis will ultimately yield the elastic modulus of the entire composite. Firstly, considering the fiber bundle interlacing, the unit cell is finely geometrically modelled. Next, the unit cell is analyzed by finite element and periodic boundary conditions are applied. The method of homogenization is used to obtain the volume average stress and strain through six independent loading analysis, and the stiffness matrix is obtained, and the engineering constant is finally obtained. Finally, the effect of fiber volume fraction on elastic properties is analyzed. At present, there are few researches on flexible matrix TWF composites at home and abroad. The research on the elastic properties of the material has laid a solid foundation for further research on the performance of the material in the future.
Numerical and Experimental Research on Nonlinear Vibration of High Line Speed Friction Pairs of Vehicle Clutch
Authors: Li Jie , Wang Xiaoyan
Published: December 2019

By analyzing friction pairs surface structural characteristics and using theory of contact mechanics, contact mathematic model of microscopic units of thermal distorsion friction pairs is built. Using mathematical statistics and normalization method, microscopic model can be transferred to macroscopic mathematic model, and then the elastic contact characteristics of friction pairs can be calculated. When Kelvin-Voigt model was inputted into elastic contact characteristics, and viscoelastic contact differential operator was led in equation, viscoelastic contact mathematic model that includes the relation of stress to strain is built. So colligating above all the simulation results, axial vibration mathematic model is built, and the nonlinear vibration characteristics and curves of high line speed friction pairs are obtained by simulation. For verifying simulation results, nonlinear vibration experiment of friction pairs of clutch is tested on conditions of various rotational speed. Result shows that the accuracy of the model is 87%, which is meaningful on both theory and engineering design. It promotes study on vibration characteristics to improve friction pairs serviceability and life.
Preparation and NIR light-driven photocatalytic properties of β-NaYF4:Yb3+, Tm3+/ZnO core-shell composites
Authors: Yi Zhigang , Jiang Tao , Ma Xuguang , Zhang Ying , Tang Qiong
Published: December 2019

A novel UV/NIR light-driven β-NaYF4:Yb3+, Tm3+/ZnO core-shell composites were prepared via microwave assisted hydrothermal technology. The results of characterize indicated that the β-NaYF4:Yb3+, Tm3+/ZnO was obtained by loading ZnO on the surface of β-NaYF4:Yb3+, Tm3+, which could efficiently absorb the UV emission light via upconversion process of β-NaYF4:Yb3+, Tm3+. The degradation of MB using β-NaYF4:Yb3+, Tm3+/ZnO particles as photocatalyst under irradiation of simulated sunlight without UV light showed photocatalytic activity of β-NaYF4:Yb3+, Tm3+/ZnO could be driven under irradiation of NIR light.
Research on Driving System of Hydraulic Robot Based on Ferrofluid
Authors: Li Jun-Long , Liu Li-Na , Gao Yu-Hong
Published: December 2019

In the driving system of hydraulic robot, the mechanical components are large and complex due to some factors such as material performance and structural design. Based on the magnetorheological properties of ferrofluid, a novel hydraulic driver method is presented based on the principle of jet pipe servo valve. Adding a magnetic field in the air field of the valve body directly controls the deflection and offset of the ferrofluid, and realizes the directly control from the electric/magnetic to fluid. The mathematical model of ferrofluid flows in the air field under magnetic field is established based on the ferrohydrodynamics(FHD).The experimental results show that the millimeter-level deflection has met the actual engineering needs of the hydraulic driving system.
Fatigue damage evolution and finite element simulation of the samples under different notch morphology
Authors: Wang Zhiqiang , Huang Xiaoguang
Published: December 2019

Based on the theory of continuous damage mechanics and the principle of irreversible thermodynamics, the damage evolution model of low cycle fatigue is investigated. By programming the damage evolution model as UMAT subroutine in ABAQUS, the fatigue damage and crack initiation life of notch materials under specific loads are simulated, and the crack initiation location is determined. Furthermore, the effects of root radius, depth and opening angle on crack initiation life are investigated. The results show that the crack initiation occurs easily in the notch root where the damage is the most serious and the plastic strain accumulates fastest under cyclic loading. With the increase of notch depth and root radius, the crack initiation life decreases. For V-notched specimens, when the notch depth remains unchanged, the crack initiation life will decrease with the increase of the opening angle.
Effect of pre-deformation on the mechanical properties of pre-aging AA7093
Authors: Wang Nan , Zhuang Linzhong , Zhang Jishan
Published: December 2019

To improve the mechanical properties of T6 AA7093, this work investigated the effect of 4% pre-stretching on mechanical properties of the 20 min pre-aging AA7093. The results show that after taking 20 min pre-aging + 4% pre-stretching treatment, the hardness of AA7093 reached the peak after taking 9 hours aging. The yield strength and ultimate tensile strength of the pre-aging + pre-stretching + re-aging AA7093 are 631 MPa and 665 MPa, respectively. Comparing with T6 AA7093, the increase of yield strength and ultimate tensile strength are 75 MPa and 29 MPa, respectively. Kinetic analysis of DSC shows that the activation energy of precipitates in T6 and pre-aging and pre-aging + pre-stretching AA7093 alloys are 216.6 kJ/mol and 129.6 kJ/mol, respectively, this results in easier nucleation and growth of precipitates after pre-deformation. TEM shows a lot of precipitates generated on dislocations in pre-aging + pre-stretching + re-aging alloy, a lot of dislocation plugs generated by pre-deformation and precipitates will impede dislocations slip is the main reason that the yield strength of it is higher than T6 AA7093.
Preparation of the nafion/CNT nanofibers via electrospinning
Authors: Li Shufeng , Luo Ru , Huang Jinrong
Published: December 2019

In this paper, we report the preparation of the Nafion/CNT nanofibers via electrospinning. PEO was added as carrier polymer to enhance the chain entanglements and therefore the electrospinnabilities of the nafion solution. Effects of the molecular weights of PEO on the electrospinnability were investigated. Three CNT samples, the CNT, CNT-150 and CNT-500 obtained from the ball-milling of the CNTs, were used and their particle size distributions were analyzed. Dispersions of the CNT, CNT-150 and CNT-500 in water and absolute ethanol were evaluated. Hexadecyl trimethyl ammonium bromide (CTAB) was used to disperse the CNT to single particle. The CNT-500, with the lower average particle size of 298.2 nm and the PDI of 0.167, shows the best dispersion in water and ethanol solution. The nafion/CNT-500 nanofibers were prepared via electrospinning by adding PEO and have better electrospinnability and morphologies.
The oxidation properties of MgF2 particles in hydrofluorocarbon/air atmosphere at high temperatures
Authors: Huang Jie , Chen Hukui , Jiang Hongli , Mu Xiaxia , Yu Jiang
Published: December 2019

The high temperature oxidation properties of magnesium fluoride powders in the atmosphere of air containing hydrofluorocarbon (HFC-134a) were characterized by EDS, SEM, XRD, and gravimetric analyses. The results showed that the oxidation property of magnesium fluoride powder was related to the concentration of HFC-134a, temperature and reaction time. With the concentration of HFC-134a decreasing, the temperature rising and the reaction time prolonging, the extent of magnesium fluoride oxidation increased. This result is great significance for further study of the protective theory of fluorine-containing gases on Mg and its alloys.
Signal Light Ptimization based on PTV Vissim Software
Authors: Lu Mingyu , Yan Sun
Published: December 2019

This paper conducts on-the-spot investigation on the traffic flow of each entry and exit road during the early peak period of the case intersection, and uses the data obtained from the survey to make accurate calculations to obtain the capacity and delay time of the current intersection, and then use PTV Vissim. The simulation software simulates the real-time road condition reduction simulation of this intersection.Finally, based on the results of the PTV Vissim simulation software, a more reasonable optimization plan for the traffic light duration configuration of the intersection is proposed, which can make the interlaced area smooth, fastest, and maximize travel efficiency. A new signal optimization solution based on PTV Vissim software can reduce the delay time of the intersection and improve its traffic capacity.
A Research on Vehicle and UAV Routing Problem during Distribution Based on IAMMAS
Authors: Han Ming , Wang Ya-Bin , Chen Xiang , Zhao Xing
Published: December 2019

According to the characteristic of vehicle and unmanned aerial vehicle (UAV) in distribution service, a vehicle and UAV distribution mode were put forward in this paper to further expand the three-dimensional space of distribution, improve the efficiency of distribution and relieve the pressure of distribution personnel. Based on the consideration of real-time road condition, real-time driving speed, maximum driving distance and mixing time windows in distribution practice, a two-stage nested VRPTW model under vehicle and UAV distribution mode was constructed in this paper. A hybrid algorithm of genetic algorithm and adaptive max-min ant system algorithm (GA-AMMAS) was designed to solve the above problems. In addition, the actual road traffic conditions and vehicle actual travel time were added to the heuristic information in this algorithm. Data experiments shows that the vehicle and UAV routing problem can be effectively solved by GA-AMMAS. In addition, compared with GA and ACA, GA-AMMAS shows obvious advantages in quality solution and speed of convergence.
Design of Expressway Safety Early Warning System Based on Internet of Things
Authors: Cao Shukuan , Huang Yanbiao
Published: December 2019

Aiming at the current situation of frequent accidents and slow rescue in the safety management of expressways in China, this paper integrates electronic, computer and Internet of Things technologies to form a self-organizing network through the routing nodes laid on the expressways, and constitutes a expressway safety warning system. At the same time, the mobile App, Web and PC monitoring platforms were developed and aggregated into the expressway traffic management center to realize real-time transmission and release of cross-platform alarm information. The test results show that the system can effectively reduce the incidence of accidents, especially secondary accidents, shorten the rescue time and improve the smooth flow rate of roads.
Vehicle Routing Problem of Fresh Agricultural Products Considering Decaying Factors
Authors: Li Shuxia , Liu Zhiying , Fang Huiming , Liu Liping
Published: December 2019

The vehicle routing problem of fresh agricultural products is different from ordinary goods due to their perishability. Therefore, we are concerned with the impact of the decaying factor on the total distribution cost and delivery routes when delivering multiple fresh agricultural products simultaneously. Based on the fact that customers often want to receive products within the expected service times, this paper proposes a multi-objective VRP optimization model for multiple fresh products to minimize both transportation costs and variance of loss quantity of fresh agricultural product. An ant colony algorithm is proposed and implemented on MATLAB to solve a given VRP problem. The impact of different exponential decaying rates and weight coefficients on the total distribution cost and the variance of loss quantity are discussed to draw managerial insights. Results indicate that suppliers need to sacrifice some benefits to improve customer satisfaction.
Public Transport Passengers’ Classification and Path Choice Characteristics Analysis by Using C&RT Model in Beijing
Authors: Wang Jingjing , Chen Yanyan , Mao Lizeng , Yang Rui , Li Dongyue , Chen Biao
Published: December 2019

The mining of IC card data for commuters’ classification and analysis of bus route choice plays an important role for public transport passengers’ choice behavior analysis, and formulating a scientific and reasonable traffic planning strategy. The authors choose some indicators for passengers’ classification in Beijing and use classification and regression tree model to build the classifier. Three parameters: departure time, travel distance and travel frequency, as the classification parameters, are input into the model and the results show 45 classification passengers; Among them, strong commuting passengers accounted for 7.25%, weak commuting passengers accounted for 30.27%, and accidental commuting passengers accounted for 62.48. This paper also analyzes the characteristics of the public transport route choice for all classification groups from four aspects: the overall characteristics, transfer characteristics, travel characteristics and subway travel characteristics. The conclusions of this paper can provide a theoretical basis for the analysis of passenger flow composition of multimodel public transport and the establishment of multi-mode bus route selection model.
Current Situation and Development of Comprehensive Automation Technology in Marshalling Station
Authors: Qian Ke , Li June , Luo Mingyu
Published: December 2019

This paper introduces the status quo of railway marshaling stations and the main signaling equipment independently innovated in China. And then analyzes the control of hump pushing locomotive, hump access control and hump rolling speed control of TBZK II type hump automation control system. Describes the technical equipment of comprehensive automation system and its future development prospects of the new-generation marshaling stations in the end.
The optimization of conventional transit network based on improved genetic algorithm
Authors: Wang Nai , Li Rui , Zhao Qianwei
Published: December 2019

To deal with problems such as ill-structured conventional transit network and low operational efficiency, this paper presents a method to use transit scheduling value and passenger transit travel time as an optimal objective function to build an optimization model, as an effort to optimize conventional transit network. It aims to improve traditional genetic algorithm, which combines the simulated annealing algorithm with the elitist strategy, and adopts the Python programming to solve the optimization model. The results show that the optimization model can output an optimal transit network and an appropriate scheduling scheme, proving that it is reasonable and feasible to use the improved genetic algorithm in the optimization of transit network.
Vehicle-bridge coupling vibration of curved beam bridge under earthquake excitation
Authors: Shen Jian , Wu Lang
Published: December 2019

Based on the non-inertial reference system, the vehicle model of four freedom degrees is used to establish the vehicle-bridge coupling dynamic system model of the curved beam in space. Considering the vehicle-bridge coupling vibration characteristics under the non-uniform seismic excitation at the two supports of the bridge, the three-dimension space curvilinear-vehicle coupling dynamic control equation is established based on the Hamiltonian principle. Then the coupling dynamic control equation of the vehicle and bridge is numerically analyzed by the method of separating variables.
Study on the Optimal Safety Distance for Turn-back Line of Regional Railway
Authors: Shi Haiou , Zhang Hui , Li Shuang , Chen Jiaqian , Sun Yuanguang
Published: December 2019

At the same time of large-scale development of trunk railway and urban rail transit, Regional Railway will gradually enter the stage of large-scale construction. Post-station turn-back is one of the most frequently used forms for regional railways, the length of turn-back line and safety distance directly affects the scale of station and construction investment. However, the provision for safety distance of turn-back line is relatively broad in the current design specifications, and there is margin for further refinement. Based on the safety braking model, starting from the fundamental reasons for setting the safety distance, this paper studies the calculation method of safety distance and turn-back capability by analyzing the factors affecting the safety distance. Combining with the actual operation requirements, considering both train operation safety and turn-back capacity, the optimal safety distance model of turn-back line is constructed by selecting the post-station turn-back. The actual station is analyzed and the research results have positive significance.
CSTM: Cluster-based Security Trust Mechanism for VANET
Authors: Wang Jijin , Xiao Xiaoqiang , Peng Lu
Published: December 2019

Vehicular Ad hoc Network (VANET) allows communications between vehicles and roadside infrastructure. Various information can be propagated by the vehicles to ensure the safety and security of the driver and passengers by reducing the transport accidents and traffic congestion, besides, VANET communication can also provide navigation and entertainment service. However, the existence of the malicious nodes results in falsified and modified messages which could affect the performance of the network and even worse, could cause dangerous situation: accident, collision, traffic congestion, etc. In order to ensure the security and stability of VANET communication, we can introduce the concept of trust and improve the credibility of communication between vehicles through trust management. Therefore, this paper proposes a cluster-based security trust mechanism for VANET. By grouping vehicles with the same speed attribute into clusters, the network topology tends to be stable, and the information credibility and node reputation value are calculated by the cluster head, to determine the authenticity of the event message.
Research on the Key Technology of the Heat Insulation and Sound Insulation of the Ultra-low Energy-consumption Green Floating Floor
Authors: Li Xiuying
Published: December 2019

At present, since global energy is becoming increasingly tight, it is imperative to develop green buildings and promote green technology. At the same time, it can also be integrated into the atmosphere of joint construction of green “Belt and Road” and the construction of Green Silk Road to make the green infrastructure build a harmonious and livable habitat for humanity. In terms of key technology of heat-insulation and sound insulation of the ultra-low energy-consumption green floating floor, analyzing and studying from status of research and development at home and abroad, sound insulation design of building, the design of the surface layer floating structure, technical characteristics of heat insulation and sound insulation of floating floor and moisturizing and sound insulation technology of floating floor, the advantages of ultra-low energy consumption green floating floor insulation are obtained finally.
Research on Application Technology of Molybdenum Tailings Sand Concrete
Authors: Chen Xiaobin
Published: December 2019

Molybdenum tailings sand is used as a fine aggregate to replace part of the construction sand, which can effectively solve the environmental pollution problems caused by the molybdenum tailings pond and has high utilization value. After tetsting the physical properties, chemical analysis, radioactivity and other indicators of molybdenum tailings sand, the results show that the molybdenum tailings sand basically meets the conditions of construction sand. By increasing the proportion of molybdenum tailings in concrete, the concrete performance will decrease in viscosity, slump loss and strength with the increase of the blending ratio. Therefore, the ratio of molybdenum tailings to substitute fine aggregate is between 40%-50%, should not exceed 60%. The problems of viscosity and strength of molybdenum tailings sand concrete still need to be solved through adjusting the concrete mix proportion or optimizing the admixture formula.
Research on the relationship between institutional investor heterogeneity and corporate environmental responsibility
Authors: Shen Chen
Published: December 2019

Taking Shanghai and shenzhen a-share listed companies from 2010 to 2016 as samples, this paper empirically studies the impact of institutional investor ownership on corporate environmental responsibility. The heterogeneity of pressure-sensitive institutional investors and pressure-resistant institutional investors is distinguished, and the influence of marketization process on institutional investors’ participation in corporate environmental responsibility is further discussed. The results show that the total shareholding of institutional investors is negatively correlated with the level of corporate environmental responsibility. Compared with pressure-resistant institutional investors, pressure-sensitive institutional investors’ shareholding is more detrimental to enterprises’ undertaking of environmental responsibilities. The faster the marketization process in the region, the more the negative effect of pressure-resistant institutional investors on corporate environmental responsibility will be weakened, while there is no significant regulating effect on the relationship between pressure-sensitive institutional investors and corporate environmental responsibility.
The transformation of the future transmission and distribution cost accounting method of power grid enterprises under the background of new electricity reform
Authors: Zhang Ge , Zhang Chao , Hao Yiqun , Bao Ruonan
Published: December 2019

Under the new round of electricity reform, China’s series of policies have put forward more and more detailed requirements for standardizing transmission and distribution cost accounting. This paper analyzes the current situation and existing problems of power transmission and distribution cost accounting of China’s power grid enterprises, and combining with relevant theories, this paper puts forward the transformation objectives, transformation paths and transformation challenges of transmission and distribution cost accounting mode in the improvement and perfection stages of power grid enterprises.
An Empirical Study on the Impact of Leadership Style on Miners’ Safety Performance
Authors: Li Song , Sun Jian
Published: December 2019

Based on the survey results of 168 miners from a state - owned coal mine, the impact of leadership style on employee safety performance was analyzed. Pearson correlation and regression analysis results show that leadership style has a significant impact on miners’ safety performance. Person-oriented leadership style and management safety commitment have significant roles both on accidents and injuries.
Will industrial restructuring under the infrastructure sector promote local governments to adopt the PPP model?
Authors: Liu Yujie
Published: December 2019

Based on the panel data of the industrial structure of 31 provinces (cities, autonomous regions) in China from 2007 to 2017, this paper studies the relationship between local government’s choice of PPP financing and industrial structure and regional attributes. The study found that the advanced industrial structure has a restraining effect on the choice of PPP mode for local governments in the infrastructure sector. Further research after adding regional attributes shows that the attributes of the central and western regions have different effects on the selection of PPP mode. This paper believes that the industrial structure is an important factor for the government to use the PPP model for financing. Therefore, local governments should fully consider the impact of regional industrial structure when conducting infrastructure investment and financing.
Research on eco-efficiency evaluation and influencing factors of Five Urban Agglomerations in China
Authors: Wang Qinghui
Published: December 2019

This research uses the SBM-DEA model to measure the economic efficiency and eco-efficiency of the cities in China’s five major urban agglomerations of the Beijing-Tianjin-Hebei urban agglomeration, the Yangtze River Delta urban agglomeration, Middle Reaches of the Yangtze River, the Pearl River Delta urban agglomeration and the Chengdu-Chongqing urban agglomeration in 2007-2016, and further analyzes the factors affecting eco-efficiency by using the Tobit model. The results show that: (1) The economic efficiency of the five urban agglomerations is at a medium to upper level. The economic efficiency among urban agglomerations still shows some differences, but the efficiency gap has shrunk. (2) The eco-efficiency of the five urban agglomerations is slightly lower than the economic efficiency, and the difference of the two efficiencies has significantly expanded after 2011. Eco-efficiency still shows significant regional difference among urban agglomerations. The nuclear density curves of five urban agglomerations show different distribution states and development trends. Environmental pollution is the determining factor for the eco-efficiency of the five urban agglomerations. (3) From the perspective of factors affecting eco-efficiency, economic development, industrial structure, investment in science and technology, environmental regulation, and population size have different effects on the overall and different urban agglomerations.
Construction of Engineering Project Management Informatization
Authors: Du Xinghua , Han Miaoling , Zhang Guofeng , Yin Zhang , Ding Mingli
Published: December 2019

Engineering project management informatization can timely discover problems in engineering projects, so as to solve problems in a timely manner, establish a good image for the company, enhance its competitiveness, and promote the rapid development of China’s engineering industry. Based on this, the paper carried out the current situation and problems of the current project management informatization construction of a detailed analysis and put forward the corresponding countermeasures, in order to better promote the development of China’s modernization project management and improvement.
Exploration on construction of engineering management related courses based on outcome-based education model
Authors: Wang Bing , Wu Ying-Dong
Published: December 2019

China’s engineering education system is experiencing a transition from research to application or practice. Professional accreditation emphasized the importance of engineering management course to share views and experiences in engineering management. Based on the preparation process for China Engineering Education Accreditation, this research adopts the outcomes-based education model to explain the construction of engineering management related courses in order to achieve better results, competencies, objectives and requirements for students. Regarding the current education development status, the directions for how to successfully apply outcomes-based education ideas into the whole period of campus life are also suggested for the discipline of mining engineering.
Social Risk Assessment of Engineering Project Based on Ordered Voting Model
Authors: Yang Jian , Kuang Xinyu
Published: December 2019

In the process of urban construction, the implementation of various engineering projects will lead to a series of social problems. If these problems are not effectively resolved, they will be further upgraded into social risks and have a negative impact on social order. At present, China’s social risk assessment methods mainly include expert scoring and expert sorting. The paper takes the method of expert sorting as the main research object. Based on the ordered voting model, this paper further analyses the scientific nature of the ranking method from the aspects of single index evaluation and multi-index evaluation.
Visualization Research and Analysis of Top Management Team Characteristics in Engineering Projects
Authors: Liu Hui , Yang Huijuan , Zhang Tiantian
Published: December 2019

In the process of project management, the project manager has a huge responsibility. The project manager determines the success of an engineering project. The project manager is a member of the executive team, so it is necessary to study the characteristics of the executive team. Scholars have produced a series of research results on the top management team characteristics. This paper uses Citespace.5.3 to analyze the characteristics of top management teams in the Web of Science database, and analyzes the research status of top team characteristics from the perspectives of the number of countries, representative scholars, geographical distribution of authors and cited authors. The cluster analysis is carried out for high-frequency keywords, and the research hotspots, theoretical basis and research direction of the top management team are compiled. The article focus on the top 10 citation bursts, and provides suggestions for future research.
Factors Analysis on Chinese Consumers’ Attitude towards Electric Vehicles Based on Online Reviews
Authors: Wang Ruiting
Published: December 2019

Electric vehicles are more economic and environmentally friendly, but they are still not widely accepted by citizens in China. This paper makes a detail study on factors influencing consumers’ attitude of electric vehicles by analyzing 2769 online reviews, aiming to point out authentic assessment from the actual EV users. Firstly, we build the comment thermodynamic chart based on the review quantity and find the comment quantity reflects the sales to some extent, and the sales amount is positive relevant to regional policies quantity. Secondly, we calculate the correlation among space, manipulate, power-consumption, power, trim, comfort, appearance, cost-performance and mainly analyze how the first seven performance influences the cost-performance. Thirdly, we study the purchase purpose, finding that for EV users, they choose EVs mainly for daily short-distance running. These findings can not only help consumers for their consumption choice, but also guide EV manufacturers about their further technology focus in a certain degree.
A research on the correlation between internal control quality and financial performance
Authors: Gao Junxin
Published: December 2019

We select 1931 Shanghai and Shenzhen A-share listed companies and 9655 groups of data during 2012-2016 as the research sample. Then we use DIB China listed company internal control index as the measure of internal control quality. We also establish a comprehensive financial performance index from debt-paying ability, operation capacity, profitability and development ability to evaluate financial performance. Next we empirically study the correlation between internal control quality and financial performance in accordance with the total samples and the industry samples. We find that internal control quality is significantly related to corporate financial performance on the whole. However, the influence is different between different industries and the correlation in technology-intensive industries is greater than that in capital-intensive industries and labor-intensive industries.
A Modeling Study on the System Dynamics of Industry-University-Research Institute Cooperative Innovation in the Innovative Factor Agglomeration Center in Developing Countries——Illustrated by the Case in Sichuan Province, China
Authors: Zhang Xiaolu
Published: December 2019

According to the feedback mechanism of system dynamics, based on the structure and function of the internal ecology of the innovation factor agglomeration zone, a scientific system dynamic model (industry, university and research institute) is constructed, and the interactive operation process of the factor flow in the system is studied and analyzed by using the causal loop diagram and the system flow diagram; and the change relationship and influence mechanism between the factor flows are discussed. In this way, the synergy law of cooperation and innovation among industries, universities and research institutes in developing countries can be controlled in depth.
The impact of government subsidy of manufacturing firm innovative decision in the background of low-carbon
Authors: Cai Xiaotian , Yang Yang , Li Zhe
Published: December 2019

In the low-carbon background, the green manufacturing and a new road to industrialization should be developed in China. Government subsidies can promote the promotion of low-energy products, and thus control the total carbon emissions. Aiming at an innovation-decision dilemma of a kind of self-research and development manufacturing firms, the characteristics of disruptive innovation and sustaining innovation were analyzed in the viewpoint of the firms’ dynamic competitive advantages. A 0-1 nonlinear decision model was built with consumer surplus as the optimization objective. This model can provide guidance for government policy strategy and manufacturing firm innovation decision. A genetic algorithm was developed to solve the 0-1 nonlinear decision model. A case study of an automobile was reported to demonstrate the feasibility and rationality of this approach.
Study on Contractual and Relational Governance Mechanism in Energy Performance Contracting Projects Based on Life Cycle
Authors: Pan Zhenni , Xia Chen , Tang Meian
Published: December 2019

In EPC projects, the cooperative performance between ESCO and the energy users is the result of the interaction of contractual governance and relational governance, and they are related closely in all transaction process of EPC projects. According to the particularity of EPC projects and life cycle theory, the life cycle of EPC projects is divided into three stages including pre-construction period, construction period, and operation period in this paper, and the three-dimensional evaluation index of EPC project performance is defined including energy saving quantity, energy saving quality and energy saving behavior. Then the contractual-relational compound governance model based on EPC project performance is performed when summarizing the functions of contractual governance and the factors of relational governance, and the contractual-relational compound governance strategies during the full life cycle of EPC projects are put forward.
Research on 3D Visualization Design of Industrial Production Management Software
Authors: Jiang Zhengqing , Xu Xiaohui
Published: December 2019

Affected by the wave of Industry 4.0, the Internet and IoT technologies are becoming more mature. However, when selecting industrial production management software, many companies still use traditional software management methods. This article describes a 3D visualization upgrade of enterprise implementation management software that describes and demonstrates the important role of 3D visualization throughout the production management process. In addition, this article studies the role of 3D visualization in the management software interface from the perspective of academic research, so as to achieve the purpose of improving the efficiency and operational efficiency of workshop management. And as a reference for industrial production enterprises in 3D visual design.
The Exploration and Application Research of Emerging Technologies in Material Management Business of Large Power Grid Enterprises
Authors: Zhang Yong , Jin Liu , Hao Shang
Published: December 2019

The new round of information technology revolution represented by big data, cloud computing, internet of things, artificial intelligence and mobile internet has created conditions for the application of operation and maintenance services in power grid enterprises. This paper analyzes the opportunities and challenges of the application of emerging technologies. This paper further explores the problems existing in the application of emerging technologies in the material management business, such as untimely information acquisition, low data quality, low intelligence level of screening and evaluation, etc., and puts forward the key points and directions of the application of emerging technologies in the material management business of power grid enterprises.