bluuebunny/crossref_metadata_2025_split huggingface dataset:
Freeway Short-Term Travel Time Prediction Based on LightGBM Algorithm
Authors: Wang Fujian , Cheng Huiling , Dai Hongliang , Han Haihang 
Published: February 2021

Abstract
In order to realize the prediction of freeway travel time, a short-term travel time prediction model based on LightGBM (Light Gradient Boosting Machine) is proposed under the influence of weather factors, time period factors, and traffic factors. These factors are called as the features used for increase prediction accuracy. The travel time of a single vehicle is determined by license plate recognition data of two adjacent video monitors in Shaoxing section of Shanghai-Hangzhou-Ningbo Freeway, and a better travel time data set is constructed by data preprocessing. The feature data are determined by Pearson correlation. Based on the analysis of main optimization parameters in LightGBM, the short-term average travel time is predicted, the MAE (Mean Absolute Error) and MAPE (Mean Absolute Percentage Error) obtained by experiments are satisfying, indicating that LightGBM model has high accuracy and good fit. Finally, through comparison with KNN (K-Nearest Neighbor) model and GBDT (Gradient Boosting Decision Tree) model, the prediction accuracy and training speed both show that LightGBM has good advantages in predicting short-term freeway travel time.
Research on Distracted Driving Identification of Truck Drivers Based on Simulated Driving Experiment
Authors: Zhang Weihao , Zhang Huiyan 
Published: February 2021

Abstract
Trucks drivers may be distracted during long-distance transportation, which may threaten the safety of themselves and surrounding vehicles. In this regard, this article first investigates the types of distracted driving that frequently occur in China and select typical distracted driving behaviors to carry out the simulated driving experiment and collect driving performance data. The independent sample T-test was used to select the distracted driving identification indicators. An integrated distracted driving identification model based on Binary Logistic Regression and Fisher discriminant analysis was established. The accuracy of the integrated model in identifying the driver’s distracted driving state is 94.79%. This research can provide a basis for the driver assistance systems that reflect the degree of driver distraction.
Test of meteorological influence on sail based on fuzzy comprehensive evaluation
Authors: Zhao Kui , He Baowei , Cui Haipeng , Du Peng , Han Bingbing , Chen Minjing , Wei Zhiqiang 
Published: February 2021

Abstract
In order to quantify the influence of port meteorological factors on sail of ships, an effective model of ship navigation restriction was established based on fuzzy comprehensive evaluation. The navigation influence was comprehensively assessed under different meteorological conditions. The influences of wind, fog, thunder and rainfall on sail were studied, and the calculation results were compared with the test results. The results show that the fitting degree between the calculation results and the test results is 85%. The navigation restriction model conforms to the requirements of engineering application. The influence of wind, fog and thunder on sail is gradually enhanced. When the wind force is less than 6, the influence factors of fog and thunder can reach 0.31 and 0.24.
A Numerical Case Study on Pier Shape Coefficient of Seismic Hydrodynamic Pressure in Design Codes
Authors: Qin Yifang , ZhengruTao  , Tao Xiaxin , HaimingLiu  
Published: February 2021

Abstract
To study the pier shape coefficient of seismic hydrodynamic pressure, three waterpier coupling finite element models of piers with circular, rectangular and elliptical sections are built. The results numerically calculated with the same input ground motion show that the horizontally distributions of the hydrodynamic pressures from the vertical central lines to the edges of the three types of piers at a given depth are almost the same, the difference among the pressures on the three piers is mainly from the decreasing rate from the central line to the edge. The pressures decrease with the input direction from perpendicular to parallel. The result values of shape coefficients are close to the provisions in Japanese code, and those for circular and elliptical piers are slightly less than that stipulated in the code; and the coefficient values for rectangular pier are less than that in Euro code 8 and those for elliptical pier are in the range of the code.
Research on the Causes and Countermeasures of Soil Erosion in Small Watersheds of Chengjiang River in Gongcheng County
Authors: Gu Zhanfei , Liu Zhikui , Quan Xin 
Published: February 2021

Abstract
Rocky desertification induced by soil erosion is a serious geological hazard in the karst regions of southwestern China. This paper made a research on small watersheds of Chengjiang River in Gongcheng County, Guilin City, Guangxi Province, analyzed the causes and trends of soil erosion in the regions by comparing rocky desertification areas in 1991, 2006 and 2015, and proposed countermeasures against soil erosion based on the above analysis. This research provides a basis for restoring ecological environments and preventing soil erosion in small watersheds of karst regions.
The application of BIM technology in the whole life cycle of a project to explore
Authors: Wang Qiaofeng , Huang Xu , Li Lijun 
Published: February 2021

Abstract
In recent years, public buildings have been paying more and more attention to the integration of aesthetic and cultural values, resulting in complex and diverse architectural forms and difficult construction. The Taiyuan Water Sports Center is similar to a sailboat in shape, with a reinforced concrete cylinder and steel truss suspension structure, a complex building system, and high installation accuracy requirements. BIM technology was introduced in the pre-planning stage of the project to explore the application value of BIM technology in the whole life cycle of the project, and the results showed that BIM technology avoided 52 collision problems, found more than 50 various problems in the deepening design stage, completed 15 3D technology transfer, saving 30% of the measurement labor cost, reducing the rework rate and later equipment operation and maintenance costs.
Feasibility analysis of semi-welded seamless turnout in Yuqomolangma Station of Qinghai-Tibet Railway
Authors: Ni Guoqing , Han Feng , Li Yuan , Wang Pengran , Li Xuliang 
Published: February 2021

Abstract
It is difficult to lay seamless turnouts on the Qinghai-Tibet Railway, and the large temperature difference between day and night on the plateau railway leads to large changes in the temperature of the turnouts. Aiming at the equipment status of No.1 turnout in the Yuzhufeng station of the Qinghai-Tibet railway, a non-linear finite element calculation model of P60-12 single-open turnout was established. The long rail was calculated and analyzed based on the construction lock rail temperature and the local maximum and minimum rail temperature. The development law of displacement under temperature changes, after comparing the field measured displacement observation data, the model calculation result is correct, and the lateral displacement meets the requirements. Comparing and analyzing on-site rail displacement observation data, the model calculation results meet the engineering accuracy requirements. In the season of the highest rail temperature in the year, strain sensors are installed at the rail waist at different parts of the semi-welded seamless turnout to collect the rail strain increment under the cyclic change of rail temperature. According to the strain increment change rule, displacement observation data and model calculation results, it is concluded that the scheme of laying a semi-welded seamless turnout in Yuqomangma station is feasible, and the rail in the bifurcation area is stable under the action of temperature stress.
Investigation and Analysis on the Function of Space Formation of Spur Dike for Around Shingen Bank Japan
Authors: Xu Tianhang , Ishii Nobuyuki 
Published: February 2021

Abstract
The Shingen Bank is famous for its flood control in Japan. Spur dike is skilfully used in river management, which creates good conditions for the human activities. In this paper, using the representative of the river regulation buildings in the Shingen Bank as the object to analyze the space formation function of Spur dike and examine human activities at the water edge. Firstly, by analyzing the ecological function and utilization of Spur dike in river space, the relationship between the Spur dike and human activities is clarified. And then, the configuration method of spur dikes in the course of river management was put forward, which could provide reference for the management and landscape planning of the near natural rivers.
Artificial Ground Motion Simulation with Multi Control Points and Automatic Recognition in Iterative Process
Authors: Xie Haoyu , Zheng Wanshan 
Published: February 2021

Abstract
Artificial ground motion simulation with target response spectrum being compatible is a significant challenge for structural seismic design. In the presented scheme, two major modifications are implied on conventional frequency domain methodology as to realize automatic recognition of stubborn points in iterative process and eliminate them by handling multiple control points in frequency domain. The proposed methodology is evaluated by numerical simulation with the target response spectrum from Chinese Specification for Seismic Design of Highway Bridges compared with conventional Stochastic Method. The result shows that the presented scheme enables to recognize stubborn points and eliminate them in iterative process as it is designed, and the fitting accuracy is improved considerably. The scheme is verified reliable to generate input ground motion candidates as a reference for engineers to conduct seismic dynamic analysis.
Research on a Rapid Evaluation Method Based on Relative Settlement Measurement
Authors: Wang Ziyao , Zhao XiuShao , long Rao Jiang , Chen Zixi 
Published: February 2021

Abstract
When the bearing capacity of the transition section of the subgrade is insufficient, reinforcement is needed to ensure the normal operation of the railway. The traditional method of judging whether the bearing capacity of the subgrade meets the requirements is time-consuming, laborious and inefficient. Therefore, a rapid assessment method of whether the transition section needs reinforcement is proposed based on settlement measurement. Through the comparison between the exploration test of the subgrade bearing capacity of the transition section and the settlement value of the subgrade, the correlation between the bearing capacity and the bearing capacity of the subgrade is established. According to the characteristics of the transition section of the subgrade, the relative settlement method, the track bed height method and the roadbed reverse slope method are proposed, and the standards for the determination of reinforcement are also obtained. This method is faster than the traditional method and saves investigation funds.
Stability analysis of slope in soil with strength mobilization
Authors: Li Xingyue , Fu Shihao , Chen Jiangong 
Published: February 2021

Abstract
Considering the strength parameters cohesion c and internal friction angle < of the soil constitutive model are mobilized non-simultaneously. By gradually applying uniform vertical loads on the top of the slope, the progressive failure process of the slope is simulated by the FLAC3D software. The failure state of the slope is judged by monitoring the maximum unbalance force in the slope system, and the slope sliding surface is determined based on the maximum shear strain increment, and the safety factor is calculated by the slope critical height ratio method. The numerical simulation shows that when the strength parameters are not synchronicity come into play, the safety factor is less than that of two cases, which consider the synchronous mobilization of strength parameters and the traditional Strength Reduction Method (SRM). Finally, the influence of residual cohesion and plastic strain threshold on the position of sliding surface and safety factor are discussed by numerical analysis.
Evaluation of Water Quality and Habitat Quality in the Beiyunhe River Watershed
Authors: Zou Jiaxiang , Wang Shiyan , Liu Chang , Han Zhen , Zhu Bei , Jiang Zhi 
Published: February 2021

Abstract
The water environmental condition of the Beiyunhe River, a typical urbanized and semi urbanized river in northern China, is under multiple threats. In this research, through site investigation and sampling, the water quality and habitat quality was evaluated by adopting the comprehensive pollution index method and the expert scoring method. The research analysis shows that: the water quality of the upstream of the main stream was better than that of the downstream, the water quality spatial characteristics were that the water quality of the upstream was relatively good, the midstream took the second place and the downstream was the worst; the water quality heterogeneity characteristics of the river was relevant to the characteristics of different rivers upstream and downstream; the result of the general evaluation of the quality of the aquatic habitats was fair, the evaluation scores of all the monitoring points were higher than 80, the comprehensive index of the habitat quality of the main stream was higher than that of each tributary, so the habitat quality of the main stream was relatively good, and there was little difference in the habitat quality of all tributaries; the main factor that affecting the quality of the river aquatic habitats in the Beiyunhe River was that the artificial disturbance of an urbanized and semi urbanized river is strong, causing relatively single river habitat, which is difficult to form complex and diverse habitats. This research can be provided as a basis for river water environment scientific management of the Beiyunhe River.
Drainage test on soil-filled geotextile bag
Authors: Xuekui Wang , Qingqing Wang 
Published: February 2021

AbstractThe drainage rate of soil-filled geotextile bag is an important factor to embankment project.Laboratory tests are carried out to study the drainage behavior of soil-filled geotextile bag. Results show: (1) drainage rate of soil-filled geotextile bag is nonlinear reduced with time, The drainage rate is large at initial phase, and then decrease rapidly as mud structure is formed on the inner surface of the bags; (2) The drainage effect is larger with less clay content, show two nonlinear law. When the clay content is lower than 22%, the reduction of soil-filled geotextile bag is small with the clay content; (3)The drainage effect is larger with larger equivalent opening size, the drainage effect of 2# geotextile with 0.155mm equivalent opening size is better than the 1# geotextile with 0.096mm equivalent opening size, and can increase 20% of clay content.
Reduction of water absorption of concrete by surface treatment with ethyl silicate
Authors: Haoxiang Wu , Yonggen Wu , Tianlun Li , Mo Li 
Published: February 2021

Abstract
Surface treatment is an effective strategy to reduce concrete water absorption and improve concrete durability in practical engineering application. In this paper, ethyl silicate and anhydrous alcohol mixed solution is chosen as surface treatment for concrete, and water absorption is tested, the test results show that ethyl silicate can effectively reduce the concrete water absorption and water absorption rate. water absorption rate reduction rate is 82.4 for T5 and 84.6% for T7, the initial rate of water absorption is reduced 94.9 for T5 and 94.7% for T7, and the secondary rate of water absorption is reduced 73.2 for T5 and 80.1% for T7.
Research on Information Management of Traffic Highway Construction Safety Based on BIM Technology
Authors: Rong Duan Rong 
Published: February 2021

AbstractThe construction of traffic highway includes design, construction and operation management, which involves a variety of data and information in these processes, while the traditional highway engineering progress is shown in the form of statistical tables, charts and reports, which is difficult to be directly linked with the specific location and pile number of the project and directly displayed. BIM model provides visual project construction management in the overall planning, design, progress and other aspects. At the same time, when the project is completed, this management information will also provide important data information for the use and operation of the highway. In this paper, the application of BIM Technology in highway construction management is investigated in the form of questionnaire survey and on-site interview, which comprehensively reflects the actual situation of BIM application in highway engineering. According to the actual situation, the future BIM Technology will provide good technical support for the informatization of construction industry, which can effectively promote safe construction.
Research on Energy-Saving Design of Thermal Insulation Structure of Residential Buildings in Severe Cold Areas
Authors: Chen Lisheng , Li Yue , Lu Xinyi 
Published: February 2021

Abstract
With the general improvement of people’s living standard, residents in severe cold areas have further increased their requirements for residential insulation, which provides new issues for the energy-saving design of thermal insulation of their residential buildings. This paper mainly introduces the energy-saving design of the thermal insulation structure of residential buildings in severe cold areas such as exterior walls and roofs, including the selection of their specific materials. It is hoped that the insulation performance can be higher and the energy-saving effect can be better.
Study on Field Relative Density Test Method of Blasting Rockfill for High Rolled Rockfill Dams
Authors: Zhao Jianming , Huang Renlong , Yang Yusheng , Wang Long , Liu Xiaosheng , Yang Zhengquan 
Published: February 2021

Abstract
At present, in the relevant design specifications for earth-rock fill dams in China, the filling standard of rockfill materials is expressed by porosity. Although the mechanical properties of coarse-grained soil are closely related to its porosity, the properties of coarse-grained soil with different gradations are not the same even if the porosity is the same. Porosity can’t express compactness, while relative density can represent compactness of coarse-grained soil. In order to control the deformation of dams reasonably, it is necessary to carry out the field relative density test of rockfill materials. In this paper, limestone rockfill is used to test. The results show that: (1) the bucket diameter of relative density tests has a certain influence on the maximum and minimum dry density of limestone rockfill. (2) In the range of test gradation lines, with the increase of the content of P
5, the maximum and minimum dry density all show the trend of increasing first and then decreasing. (3) When the content of P
5 is the same, the maximum and minimum dry density of limestone rockfill increase with the increase of the maximum particle size, and the particle size has a significant impact on the maximum and minimum dry density.
Friction - wear modeling in drilling process of H-13 tool steel
Authors: Panagopoulos G S , Panagopoulou M S , Nikolakopoulos P G 
Published: February 2021

Abstract
Simulation of metal cutting is complex both from numerical and physical perspective. The scope of this work is to elaborate on the process and physics of metal cutting, and more specifically drilling. The description of H-13 steel dry drilling with the use of a single-layer TiN coated carbide twist drill is presented. H-13 is a high strength alloy steel used in demanding applications and elevated temperatures. A simulation model was developed with use of Deform-3D software, and an experiment was conducted in order to evaluate the acquired simulation results, meaning the wear mechanisms and thermal loads implemented during the process of drilling. The Usui wear model was used for the calculation of the wear rate of the drill. Regarding the experiment, a thermal camera was used in order to record the temperature of the drill after the process. The comparative analysis of the simulation models and the experiment showed that adhesion is the dominant wear mechanism. Higher wear values were observed in the rake faces of the drill, where the coating starts to fade, due to built-up edges (BUE). The tool and workpiece temperatures reach near steady state conditions during process. Elevated temperatures are applied on the removed material. Good chip evacuation and chip length indicate that coated drills with optimized geometry are suitable for drilling tough materials.
Thermodynamic analysis and optimization of Transcritical and Supercritical Organic Rankine and Brayton Cycles coupled to parabolic trough collectors
Authors: Papingiotis T , Koronaki I , Komninos N , Antonakos G 
Published: February 2021

Abstract
The main objective of this work is to investigate the efficiency of three different power cycles coupled with parabolic through collectors in Athens/Greece. The power cycles analyzed where: subcritical ORC with n-Pentane and R245fa as working fluids, trans-critical ORC with R245fa as working fluid and super-critical Brayton cycle with CO
2 and R245fa as working fluid. Mathematical models were developed for both the solar farm and the power cycles in order to optimize the necessary parameters for the optimal operation of the plant. The inlet temperature and pressure of the turbine are the optimization parameters. The overall efficiency of the system (power to solar) for the sub-critical ORC with n-Pentane and R245fa is 14.12% and 10.31% respectively. For the trans-critical ORC with R245fa the efficiency is 15.14% and for the super-critical Brayton cycle for CO
2 and R245fa, 13.23% and 8.87% respectively.
The efficiency of extracting clean energy in the Dobrogea Region of Romania
Authors: Veresiu S , Mereuta E , Novetschi M 
Published: February 2021

Abstract
The aim of this study is to evaluate the efficiency of extracting clean energy in the Dobrogea region of Romania. More precisely was analyzed the wind potential in correspondence with some economical parameters that determines the efficiency of extracting clean energy. For this purpose, a data set that contains wind zonal and meridional components for a period of 20 years was processed. In this study, the data set was downloaded from the European Centre for Medium-Range Weather Forecasts. By analyzing the levelized cost of electricity, the annual energy production, the annual expensive and other parameters it can be easily observed that implementing new project for extracting renewable energy can be efficient.
Directional detection of dark matter with diamond
Authors: Marshall Mason C , Turner Matthew J , Ku Mark J H , Phillips David F , Walsworth Ronald L 
Published: February 2021

Abstract
Searches for weakly interacting massive particle (WIMP) dark matter will in the near future be sensitive to solar neutrinos. Directional detection offers a method to reject solar neutrinos and improve WIMP searches, but reaching that sensitivity with existing directional detectors poses challenges. We propose a combined atomic/particle physics approach using a large-volume diamond detector. WIMP candidate events trigger a particle detector, after which spectroscopy of nitrogen vacancy (NV) centers reads out the direction of the incoming particle. We discuss the current state of technologies required to realize directional detection in diamond and present a path towards a detector with sensitivity below the neutrino floor.