bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on the upsizing of container ships based on VAR model
Authors: Deng Yang Cheng 
Published: June 2021

Abstract
In this paper, the large-scale container, and the relationship between the world economic pattern and the analyses, the first analysis of container development history and the influence factors of the development of the economic situation of the world in recent years were reviewed, and then using VAR model for the world economy carries on the quantitative analysis and the container ship large-scale development, It has been concluded that the growth of the world economy has contributed to the large-scale production of container ships, and this effect will gradually turn negative and eventually fluctuate up and down to zero. The research results can be used as a guide for shipping enterprises to select and build ships and to study the large-scale container.
Seismic Evaluation Method of UHV Transformers for Soil-structure Interaction
Authors: Zhu Zhubing , Cheng Yongfeng , Lu Zhicheng , Wang Haibo , Xue Yaodong , Liu Zhenlin , Zhang Shujun 
Published: June 2021

Abstract
China is an earthquake-prone country. In recent years, Wenchuan earthquake and other earthquakes have caused serious damage to power facilities. As the most important electrical equipment in UHV substations, transformers are facing great threat of earthquake disasters. Currently, seismic evaluation of UHV transformers does not consider soil-structure interaction, which is not conducive to fine seismic design and evaluation of UHV transformers. Based on the structural features of the UHV transformer equipment, the seismic evaluation method of the UHV transformer with soil-structure interaction is proposed in this paper, which provides a basis for the seismic performance evaluation of the UHV transformer.
Research on Critical Success Factors of Utility Tunnel Project Based on Grounded Theory and DEMATEL
Authors: Yu Qi , Liu Yisheng 
Published: June 2021

Abstract
The success of the utility tunnel project depends on many influencing factors. Establishing a complete conceptual model and identifying the critical success factors can provide effective scientific support for the development of the utility tunnel project. Based on a large number of case data, grounded theory is used to carry out multi-level decoding, to identify the success factors of the utility tunnel project, and a model of ‘consciousness orientation-objective conditions-internal driving factors’is constructed. The DEMATEL analysis model is used to calculate the Influence Degree, Influenced Degree, Center Degree, Cause Degree of each factor. Combining the quadrant diagram method, we finally get four critical success factors of professional technology maturity and development, government support, financial guarantee and pipeline entrance mechanism. At the same time, corresponding countermeasures and suggestions are put forward to promote the development of utility tunnel.
Research on civil engineering project team management under adverse conditions
Authors: Leilei Liu , Xu Ren , Liangsen Li 
Published: June 2021

Abstract
Under the background of COVID-19 global spread, engineering project management is facing new difficulties and challenges. Because of the urgency and temporary uncertainty of civil engineering projects, it is more likely to be affected by environmental stimulation, which will affect the cost, quality and progress of the engineering project. How to maintain the stability of the project management team and improve the project performance under the adverse conditions is a new topic in the research of engineering management. Based on the Conservation of resources theory, the theoretical model of team learning in engineering projects under the background of epidemic situation is explored and verified, which can influence project performance by enhancing team resilience, and the moderating effect of collectivism orientation is found. Finally, the management suggestions of the project team are put forward under the adverse situation such as the impact of epidemic situation.
Research on identification and monitoring method of bolt connection loosening based on piezoresistive effect
Authors: Xuezhi Liu 
Published: June 2021

Abstract
Bolted connection is commonly used in the joint connection of engineering structures, and its connection reliability plays an important role in ensuring the service performance of engineering structures. In complex service environment, bolt connection is easy to loose. In order to identify and monitor bolt connection looseness, a bolt looseness monitoring device based on piezoresistive effect is designed and manufactured in this paper. The feasibility of the device is verified through flange bolt looseness identification test. The results show that the monitoring device can effectively identify the minor bolt loosening damage, and the identification results have good stability, and the bolt loosening can be deduced based on the variation of the conductance value. The bolting connection loosening monitoring method based on piezoresistivity effect proposed in this paper can provide a reference for the identification and monitoring of bolt loosening.
Experimental Research on Crack Resistance of Fiber Asphalt Mixture in Cold Area
Authors: Peng Bo , Liu Shuai , Li Wenying , Peng Jingwen , Li Yilang , Wang Zhensheng 
Published: June 2021

Abstract
The asphalt mixture’s anticracking performance is reduced to solve the problem that the asphalt pavement in the cold area is affected by the continuous and large temperature difference, and the damage features of the fiber asphalt mixture are not clear under the action of large temperature difference cycle fatigue. This article first determines the large temperature difference interval as A, B, C and uses ABAQUS to perform mechanics on the pavement structure in different large temperature difference intervals response analysis.
Study on Evaluation Technology of Regional Grouting Treatment Effect in Limestone Aquifer of Coal Seam Floor in North China Type Coalfield Based on Two-roadway Parallel Electrical Method
Authors: Liyun Ding 
Published: June 2021

Abstract
In recent years, the regional grouting treatment technology for limestone aquifers of coal seam floor in North China type coalfield has been developed significantly. However, the detection and evaluation of water inrush risk(or treatment effect) after grouting for limestone aquifers has not yet formed a complete technical system. In view of the high cost and low amount of information of traditional grouting evaluation methods(such as water pressure test method, borehole television method, drilling core method, etc.), it is proposed to collect geoelectric data by two-roadways parallel electricity method, to process geoelectric data by the whole space three-dimensional resistivity inversion technology and to draw a three-dimensional resistivity distribution diagram. Combined with the geological structure, hydrogeological characteristics and grouting information of the detection area, the effect of grouting treatment in limestone aquifer of coal seam floor can be evaluated. This technology was applied to the detection and evaluation of the grouting treatment effectiveness to the L8 limestone aquifer of the 2-1 coal seam floor of the 11291 working face in Zhaogu No.1 Coal Mine, which effectively guided the safe production of the working face and achieved good practical effects.
Prefabricated House Precast Part Project Scheduling Optimization Problem Based on Network Planning
Authors: Ma Tian , Liu Yisheng 
Published: June 2021

Abstract
Project scheduling has been the core of project management, whose largest characteristics are the limitation of resources and the diversity of activity modes. And the prefabricated building has become the most potential building form due to the promotion of policies and its own unique advantages. However, the unreasonable project scheduling might cause some problems, such as resource waste problem. This study established the mathematical model for multi-mode resource constrained project scheduling problem on Prefabricated house precast parts project, which realized the comprehensive optimization of time and cost under the condition of satisfying the constraints of logical relation and resource. And then the problem was solved by Cplex in Python, the optimized scheduling scheme was also obtained. It might provide reliable basis for project management.
The construction technology and simulation analysis of a cable-stayed arch composite bridge
Authors: Chen Zhou , Xu Haocheng , Lu Hanwen , Chen Zepeng , Lin Hongxin , Wu Xi 
Published: June 2021

Abstract
In order to explore the changes of mechanical properties of cable-stayed arch composite bridge in different construction stages, this paper takes a 136m tensed-string arch bridge as the engineering background, briefly describes the construction steps of grid lifting, and adopts Madis/Civil finite element analysis software for modeling. The actual construction process of the arch bridge is simulated by classifying different construction stages. The static and dynamic mechanical properties and stability of arch Bridges are studied. Through research and analysis, the main conclusions are drawn that the cables of the tensioned arch bridge bear part of the load of the original arch rib and girder.
Shaking table test on multi-dimensional seismic response of structure and nuclear power equipment coupled system
Authors: Li Binbin , Xu Weifeng , Wang Sheliang , Liu Bo , Liu Yang , Zhao Qingyun , He Lu 
Published: June 2021

Abstract
Structure and nuclear power equipment coupled system in nuclear power plant has complex dynamic interaction under seismic action. In order to study the seismic response of coupled system and assess seismic capacity of nuclear power equipment, shaking table test on coupled system by multi-dimensional seismic action was carried out. The natural frequency and damping ratio of the structure and nuclear power equipment were measured by two dynamic characteristic tests before and after the test. Furthermore, the test also included five operating basis earthquakes and one safe shutdown earthquake by using the artificial seismic waves as seismic inputs. The test results show that the dynamic amplification effect of the coupled system is obvious, and acceleration amplification factor of the equipment in the coupled system is about two times of the equipment directly connected to the shaking table in the X direction, between one and two times in the Y and Z direction. Compared with the structure, the dynamic response of the equipment in the coupled system also has a certain degree of amplification effect. In addition, the dynamic characteristics of structure and equipment change little. The equipment works well under all the test conditions, meeting the seismic requirements.
Optimal control model and strategy of flexible load participating in distribution network
Authors: Liu LiBing , Sun ChaoLiang , Liu YongGuang , Wu ChenKai , Li Jin , Liu MingMei 
Published: June 2021

Abstract
The double carbon target puts forward higher requirements for end load interaction, user-side electric vehicles, air conditioners and other resources have high elastic characteristics. Their value as schedulable resources has not been fully realized, the interaction ratio is insufficient. Therefore, on the premise of ensuring user satisfaction, the elastic load control technology under load aggregator mode is used to smooth the load fluctuation of distribution network. IEEE33 node distribution system is simulated and user satisfaction model is established. The simulation results show that when the user satisfaction is greater than 80%, the elastic load can better fit the operation control value, and the average error is less than 5%, which can meet the application requirements.
Azo Dye Decolorizaiton by Consortium HR under High Temperature and Salinity
Authors: Li Keyuan , Lou Yifan , Han Lu , Wang Chongyang 
Published: June 2021

Abstract
Azo dye is a kind of most commonly used dyes in related industries. As the discharge from azo dye related industries is commonly found with high salinity and temperature, halo-thermophlic microbes able to decolorize azo dyes are required. Consortium HR enriched under 5% salinity and 50°C in this study was mainly composed of Ueribacillus (70.4%), Tepidimicrobium (11.7%) and Clostridium (10.4%). The influence of salinity (1% to 10%) and pH (6 to 10) on the decolorization process were further measured. Meanwhile, consortium HR was identified with ability to decolorize several kinds of azo dyes and the phytotoxicity of the metabolic intermediates was decreased with the incubation time. All the results indicate that consortium HR has a good potential in the decolorization of azo dyes in hypersaline, high temperature and week alkaline conditions.
Research on Energy Consumption Prediction Based on Machine Learning
Authors: Liu Ren , Wang Zhonghang , Chen Haihong , Yang Jie 
Published: June 2021

Abstract
Energy conservation and emission reduction is an important part of enterprise management. Energy costs directly affect the economic benefits of enterprises. Energy control of industrial air conditioning has long been the focus of the attention of enterprises. At present, enterprises often adopt fixed pre-cooling and pre-heating time for air conditioning start-up strategy, and there is no unified and scientific standard. By collecting and cleaning the historical data (climate, capacity) of air conditioning operation of enterprises, this paper establishes a scientific model of air conditioning energy consumption and a prediction model of air conditioning starting time. In addition, the theory and technology proposed in this paper are applied in practice to design and implement the air-conditioning energy control system of smart factory, and to predict the starting time of the air-conditioning in the production workshop of enterprises. The results show that the system can help enterprises achieve the goal of intelligent energy management and control.
Application of on Line Chemical Cleaning for Stainless Steel Tube Condenser in a Power Plant
Authors: Yao Li , Fengyuan He , Fei Wang , Chengming Liu 
Published: June 2021

Abstract
According to the characteristics of stainless steel material and scale composition of condenser in a power plant, nitric acid was used as cleaning medium, and corrosion inhibitor was added to inhibit the corrosion of nitric acid on stainless steel. On line chemical cleaning was carried out on the condenser without shutdown. The scale removal efficiency and corrosion rate met the requirements of DL/T957-2017, and the terminal difference of condenser recovered to the optimal value after cleaning.
Research on elevator passenger fall detection based on machine vision
Authors: Liu Shaofeng , An Ziliang , Wang Ning , Bai Dingsong , Yu Xintong 
Published: June 2021

Abstract
Aiming at the problem that the current elevator monitoring system cannot detect the accidental fall of passengers, this paper proposes a fall detection method based on machine vision and multi-feature fusion. First, moving targets were extracted by ViBe algorithm, and then the human body was marked with an external rectangle. Three characteristic parameters, namely the aspect ratio, effective area ratio and centroid acceleration of the human body, were calculated. At last, thresholds were set and SVM classification training was conducted to judge whether there was a fall event. Experimental results show that the algorithm has high accuracy and good stability. It can effectively reduce the injury caused by the elderly falling down in the elevator.
Research on solving strategy of structural reliability index based on probabilistic interval hybrid model
Authors: Wu Xiaoxiang 
Published: June 2021

Abstract
In this paper, a hybrid model is established in which the randomness of probabilistic parameters coexists with the uncertainty of interval parameters. Based on the reliability theory, the evaluation criteria of structural reliability under the hybrid model were proposed, and the two-layer cycle method and direct iterative algorithm were derived to calculate the structural reliability index. The correctness and effectiveness of the model and algorithm are verified by examples of a cantilever beam and a three-story frame structure. The hybrid model combines the probabilistic model with the interval model effectively and has practical significance for the engineering application of reliability theory.
Study on velocity field analysis and back-mixing of fluid in reactor based by simulation
Authors: Cheng Lei , Li Miao , Zhao Xinyu 
Published: June 2021

Abstract
During the operation of the reactor, the degree of back mixing directly reflects the concentration distribution, temperature distribution, reaction process of the fluid in the reactor, and so on, thereby affecting the practical value of the reactor. Therefore, this article uses computer simulation to analyze the influence of inlet flow rate on the degree of back mixing. It can provide data support for the preparation of organic semiconductor materials under different reaction conditions. The research results show that when the inlet flow velocity reaches 0.3 m/s, the stirring effect of the fluid weakens, the jetting effect of the inlet pipe is dominant, and the model parameters are the largest.
Research of Microbial-gel Combined Flooding Technology of Ba19 Block in Baolige Oilfield
Authors: Qiu Liangliang 
Published: June 2021

Abstract
Bal9 fault block is a medium-high temperature (58°C) reservoir in Baolige Oilfield. The crude oil is characterized by poor physical properties which has high wax and high gum content. The oil-water viscosity ratio is high and this leads to a low water flooding efficiency. The reservoir heterogeneity is high and the contradictions between layers are prominent. According to the characteristics of the oilfield, a microbial-gel combined flooding technology with the microbial flooding as the main body and the gel flooding as the auxiliary is developed to improve the overall development effect of the oilfield water flooding. Microorganism can improve the physical properties of crude oil, and appropriate gel flooding should be carried out to enlarge the sweep volume of microorganism work and improve the effect of microbial-gel combined flooding. By continuous application of this technology in Baolige Oilfield, the concentration of microorganisms is maintained at about 106 a/ml, and the whole microbial field is formed. The average annual reduction rate of crude oil is 48.1%. The microbial-gel combined flooding technology is verified to increase the recovery factor by 9.5%. Since the combined flooding was carried out in 2010, the recoverable reserves of the Ba19 block increased by 630,600 tons.
Wind speed time series forecasting method in wind farm based on EEMD
Authors: Dongyang Yu , Fengchang Sun , Xiaochuan Deng , Zheng Wang , Jiahua Wu , Zhichao Zhang 
Published: June 2021

Abstract
The article described the relevant knowledge of wind speed prediction and the verification method of the forecast. First, the characteristics of wind speed are general analyzed. Through the form of wind, speed frequency of wind, shear speed and turbulence characteristics of wind, it was found that the wind speed had instability and non-linear characteristics. By analysing the basic principles of the three methods included the time series, neural network method and empirical mode decomposition, the wind speed time series prediction method was proposed. On the basis of this method, it was applied to a raw wind factory speed time series and simulated reality by Matlab. Compared the predictive conclusion with original data, it gained a higher accuracy and verified the efficiency of the method.
Research on the application of GIS technology in the preparation of village planning--Take Feng Sheng Village as an example
Authors: Hao Song 
Published: June 2021

Abstract
Hubei Province is gradually carrying out the preparation of five levels and three types of territorial spatial planning, to scientifically layout construction space, agricultural space and ecological space, and strengthen the guiding and constraining role of territorial spatial planning for all planning. At the same time, in order to promote the construction of beautiful countryside and rural revitalization, the preparation of village planning in Hubei Province is also in progress; according to the five levels and three categories of territorial spatial planning, village planning belongs to the township-level detailed planning category, and the conventional village planning can no longer meet the requirements of territorial spatial planning, so the ecological space, agricultural space and construction space in village planning should be adjusted and whitened with the help of GIS technology. Therefore, the GIS technology should be used for landuse adjustment, white space delineation, spatial control and comprehensive improvement of the national land space.
Codoping of phosphorus and nickel enhance electrocatalytic dechlorination performance of Pd-based catalyst
Authors: Chen Yanju , Wang Wenhong , Wang Minmin , Pan Yuan , Liu Yunqi 
Published: June 2021

Abstract
Chlorinated aromatic compounds are important raw materials or intermediates in many industries, but they are highly toxic and difficult to degrade in the natural environment. Electrocatalytic dechlorination technology can transform chlorinated compounds with high toxicity into substances with low toxicity and easy degradation, so it has broad application prospects. Compared with other metal catalysts, Pd-based catalysts have the highest electrocatalytic dechlorination activity. However, the high price of palladium limits the large-scale application of this technology. Hence, Ni doping strategy was used to reduce the usage of Pd in this paper, Pd-Ni and Pd-Ni-P catalysts were successfully prepared, and electrocatalytic dechlorination performance of 4-chlorophenol was studied. The results showed that the Pd-Ni-P catalyst had the highest dechlorination activity, the mass activity was 1.69 times that of pure palladium catalyst, and the use of Pd was reduced by 26.67%.
The difference of industrial NOx emission and the effect of income division reduction in China
Authors: Wang Xiaoshuo 
Published: June 2021

Abstract
In this paper, based on industrial added value and per capita NOx emissions intensity, regional emissions difference of China’s 30 provinces from 2008 to 2017 was calculated and analyzed by Theil index and an empirical research on the effect of various factors on NOx emission reduction. The main conclusions were as follows. The regional differences of China NOx emission intensity are evident. The regional difference of industrial added value of NOx emissions intensity was greater than the average per capita NOX emissions intensity and the differences are mainly shown in the western area by two kinds of indexes. On the whole, the impact of GDP per capita on industrial value-added emission intensity and per capita emission intensity is different. Therefore, in order to improve the effectiveness of NOx emission reduction, the government should adopt different strategy based on the income characteristics of different regions.