bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis on the Stability of Top Pushing Construction of Curved Steel Box Beam of a Cross-sea Bridge
Authors: Yu Xinbo , Ma Liang , Ren Shipu , Xu Gangnian , Chen Zihua , Zong Xu 
Published: May 2021

Abstract
The curve steel box girder has the risk of instability in the jacking construction, especially in the case of big waves on the sea surface. It is very important to analyze the stress of the structure during the jacking construction. According to the Midas Civil finite element model, a bridge span is arranged as (49+60+49) m according to various unfavorable loads. The stability of the curved steel box girder bridge during jacking construction is analyzed, and the site construction is controlled according to the calculation results.
Research on long-term deformation monitoring of PC box girder bridge strengthened by a cable-stayed system
Authors: Xu Gangnian , Yu Xinbo , Li Jinxian , Chen Zihua , Zong Xu 
Published: May 2021

Abstract
To study the down-warping improvement for main girder of Dongming Huanghe River Highway Bridge after the reinforcement of the cable-stayed system, the long-term data of the main girder deflection were collected from 2018 to 2020, and the effects of different years, quarters and span on main girder deflection were analyzed, the results showed that the main girder deflection tended to be stable within 9 months after the reinforcement, the down-deflection trend of main girder was effectively suppressed within 3 years, and the effect of the cable-stayed reinforcement was obvious. Compared with 2018, the mid-span of main girder was generally raised in the first quarter of 2020, but the mid-span down-deflection was increased in the second, third and fourth quarters. In the relatively high average atmospheric temperature of each year, the main girder had improved as a whole, and the temperature had a great influence on the deflection of main girder, especially in the third quarter of higher temperature, it can be seen that the deflection of each span fluctuated greatly.
Research on Green Building Materials in Civil Engineering Management System
Authors: Sun Shilong 
Published: May 2021

Abstract
The development of the real estate industry has increased the application market capacity of green building materials, and the demand for green building materials has also greatly increased. The formation of the concept of pollution-free, energy-saving and environmentally friendly housing by consumers has gradually changed the choice of traditional civil engineering construction materials and Cost control. The application and promotion of a large number of green building materials in civil engineering construction has laid a material foundation for the construction of energy-saving and environmentally friendly buildings in China. The article is based on this, using inorganic raw materials potassium silicate, sodium silicate, and silica sol as base materials, add a certain proportion of organic silicon modified styrene-acrylic emulsion, and then add titanium dioxide, kaolin, talc, nano-titanium dioxide and other fillers and coating film-forming additives to prepare water-based inorganic coatings. The test results show that the prepared coating has good physical and chemical properties, environmental protection performance, and fire resistance performance, and can be widely used in the construction industry with obvious social and economic benefits and environmental protection benefits.
Experimental investigation on vortex-induced vibration of variable diameter riser with uniform flow
Authors: Feng Liping , Li Peng , Liu Lihua , Zhong Ziqian , Wang Chuanzhen 
Published: May 2021

Abstract
Diameter design of the riser is a very important link in offshore riser engineering, which will affect a series of parameter changes of the riser. In this paper, the riser is a variable-diameter riser with different cross-sections spliced by riser sections with diameters of 18, 25, and 30. In the wave-flow combined flume, dynamic response parameters such as strain-time history curve and root-mean-square of dimensionless strain were obtained by changing the outflow velocity and diameter of the riser, the effect of variable diameter on vortex-induced vibration of the riser was studied in detail. The results show that the vibration amplitude of the variable diameter riser varies with the axial position of the riser, but the frequency is dominated by the excitation of the thickest section riser; the variable diameter riser is always dominated by the first-order frequency in the outflow velocity range, and the relationship between the in-line and the cross-flow dominant frequency is always 2 times. With the increase of the flow velocity, the root mean square value of strain increases steadily.
Analysis and Optimization of Long Baseline Acoustic Positioning Error of Synchronous Responsive Type
Authors: Wang Tianwei , Yang Guiguang , Deng Yucong , Yan Chao , Yu Wei 
Published: May 2021

Abstract
In order to solve the problem of large time delay and low accuracy of position determination when the long-baseline positioning system is operating at large depths, the underwater acoustic positioning technology of the long-baseline array is studied and the long-baseline synchronization positioning error analysis is carried out, and the simulation verification is carried out by MATLAB. A method for optimizing the underwater acoustic positioning algorithm is proposed. After optimizing the positioning algorithm, in the case of a water depth of 6000 M and a positioning area of 1000*1000m2, the total positioning error of the sitting-bottom long baseline is reduced from the meter level to the decimeter level, and the positioning accuracy is greatly improved. An improved synchronous response type is determined The underwater acoustic positioning can realize the underwater large-scale, high-precision and high-real-time positioning.
Mechanical characteristics of karst tunnel lining structure under the action of groundwater from rainfall seepage
Authors: Wan Fei , Li Xuefeng , Zhang Xuan , Tian Shikuan 
Published: May 2021

Abstract
Heavy rainfall in areas with developed karst depressions will cause the water pressure behind the tunnel lining structure to rise rapidly, which brings about high safety risk of the lining structure. In order to determine the stress characteristics of the karst tunnel lining structure under the effect of rainfall seepage, a load-structure numerical model was established to analyze the changes in axial force, bending moment and safety factor under different water load conditions. The calculation results show that the single-point (small range) water pressure often leads to the damage of the arch and invert of the lining structure. When the pressure-bearing range increases, the damage of the foot and side wall of the lining structure tends to occur. When the overall range of the invert is subjected to water pressure, the damage of the lining structure from the invert to the side wall is likely to occur. Among them, the increasing pressure-bearing range is the most unfavorable water load state, and the safety factor of each part of the lining structure is significantly smaller than that in other three water load states. The research results can provide reference for the design of the lining structure section in similar conditions.
Study on the Vibration Testing Technology in Nondestructive Testing of Masonry Structures
Authors: Zhong Weiqiu , Liu Kun , Yin Rui , Li Wuxu , Jiang Zhipeng 
Published: May 2021

Abstract
This paper presents a method for the application of vibration testing techniques in the nondestructive testing of masonry structures, which gives the masonry compressive and shear resistance as well as vibration deformation performance by calculation, and achieves accurate nondestructive testing of the structure about the actual measured data. The practical example shows that the method is feasible and it provides a scientific basis for the testing of masonry structures.
Vespa Mandarinia Recognition and Prediction Strategy Based on Geographic Location and Image Recognition
Authors: Liu Fangzhou , Zhu Hao , Cheng Xianghong 
Published: May 2021

Abstract
The paper conduct data analysis and information mining from the following four aspects: the correlation between geographic location and the spread of Vespa mandarinia, image recognition with the help of convolutional neural networks, species richness prediction and accurate recognition optimization, Vespa mandarinia reproduction law and reproduction characteristics, and then propose a reliable prediction model of Vespa mandarinia spread range and a model to predict the possibility of misclassification. First, consider whether the spread of pests in a period of time can be predicted. We arrange the 14 Positive IDs in chronological order and use a time series model to predict the spread range, quantify the results as longitude and latitude, and compare the results. The optimal degree is calculated. The results show that this model can accurately predict the staged emergence of Vespa mandarinias. Next, we select 1/6 high-resolution images based on the provided data set files and image files, based on the SNP selection algorithm of the χ2 test, and perform data labeling preprocessing to create a model that can predict the likelihood of a mistaken classification. Further borrow the geographic location of model one and the image recognition of model two, and use both as factors influencing the possibility of whether the newly submitted report is confirmed as a Vespa mandarinia. With the help of the Euclidean distance within the bounds of the rectangular frame, it is compared with the distance between two adjacent points to determine the impact factor 1, which is conducive to predicting the geographical distribution of the Vespa mandarinia through time series analysis. With the help of the image recognition model, the output of the convolutional neural network is used as the second impact factor, which is conducive to high-performance identification of Vespa mandarinias through real pictures. Further analysis shows that the weight ratio of the two impact factors is 3:7. Finally, we analyzed the Vespa mandarinia’s cycle reproduction law, combined with the possible genetic variation and species evolution within the population, and concluded that if there are other new reports, they should be added to the training set to rebuild the model. training. At the same time, the possibility of the elimination of this pest in Washington State is discussed. Through the statistical historical data of the monthly detection report, and further combining with time prediction, until the forecast report stabilizes to 0 within a certain period, or in a certain period If reports are submitted within the cycle, but all non-Vespa mandarinias are judged, it can be deemed that Washington State has eliminated this pest.
Research on Design of Lightweight-Blade Metro Fan Based on Glass Fiber and Phenolic Resin Composite
Authors: Qi Bosong , He Shiji , Cao Xuewei 
Published: May 2021

Abstract
With the development of urban construction and the continuous increase of subway operating mileage, the energy consumption of subway ventilation system has become a hot spot of concern. For the subway fan, a lightweight blade subway fan design based on glass fiber phenolic resin composite material is proposed. It has the advantages of low cost, high strength, and good energy-saving effect. It is an effective way of light-weight and energy-saving subway fans.
Mechanical simulation analysis of lightweight blades using glass fiber phenolic resin composites
Authors: Zhu Lingfeng , Xu Jingfeng , Zhang Wenze 
Published: May 2021

Abstract
This paper uses simulation methods to verify the reliability of applying glass ferroaluminium alloy laminates to subway fan blades. Through the force analysis of its blades, it is found that the material has a wider application prospect in subway fan blades, and it can achieve better energy-saving effects than the existing aluminium alloy blades.
Large scale plate loading tests of refuse soil
Authors: Tian Tian , Hu Jin , Yao Xiaobo , Hu Sheng gang 
Published: May 2021

Abstract
Refuse is a type of soil composed of domestic waste and filling soils. The ch emical components of the refuse is extremely complex, and the mechanical parameters of the refuse is dependent on the local economic development, customs, climatic cond itions and geological condition. In this condition, the field tests is required to obtain th e mechanical parameters of the refuse. In this study the large sale plate loading tests w ere carried out on the refuse soils at the garbage landfill of China International Garden Flower Expo at Wuhan. Based on the tests results the influence sphere of refuse soil un der 1200T is obtained. The tests results can provide reference and guidance for the sim ilar projects.
Study on The Effect of Chestnut Shattering and Mechanical Shattering Mode
Authors: Yang Xueyin 
Published: May 2021

Abstract
In the shelling contrast test, different shelling force and feed displacement of chestnut were tested under different water content, size and loading speed. The main influencing factors were obtained through variance analysis, which provided theoretical basis for the selection of shelling tool and feed displacement of chestnut. The results showed that among the three peeling methods of compression, shearing and kneading, the peeling effect of kneading was the best, followed by shearing and compression.
Vehicle Pose Estimation Method for Lane Line Detection Through Monocular Camera
Authors: Li Xingxing , Duan Chao , Zhi Yan , Yin Panpan , Wang Ningxing 
Published: May 2021

Abstract
Lane detection algorithm is widely used in the field of driverless. In this paper, a lane detection method is proposed to estimate the vehicle’s driving position and attitude. Firstly, a frame of image is transmitted from monocular camera. In this paper, each frame image is pre-processed. After Sobel edge detection, the x-direction edge features of the single frame image are obtained. Then, the region of interest in the image is demarcated, and the line segment in the image is found through Hough transform, and the line ends are filtered, and two are selected respectively for vehicle calculation According to the position line and angle line of pose, the current angle of the camera is calculated by vanishing point, and then the homography matrix is obtained by using the external parameters of the camera, and the image is affine transformed, and the current position of the monocular camera is finally obtained.
Towards Formal Specification for AADL with Behavior Annex in Isabelle
Authors: Tan Yu , Ma Dianfu , Qiao Lei 
Published: May 2021

Abstract
The analysis of safety-critical systems designed by architectural languages such as AADL (Architecture Analysis and Design Language) is a challenging research topic. In such a context, formal methods become an advocated practice in software engineering for rigorous analysis. Moreover, they are applied on specific formalisms to be analyzed on dedicated tools. This paper studies the comprehensive formal specification for AADL language, in particular supporting major components of AADL and Behavior Annex. The presentation of this specification and modeling is the aim of this paper. This work is illustrated with a ARINC653 case study. As a study case, this work develops an AADL model from an ARINC653, specify a set of critical properties of the model and perform formal modeling in in Isabelle/HOL.
The Core Control Strategy Adapted to Different AGC Control Modes for Ultra-supercritical Once-through Furnace Unit Burning Lignite
Authors: Xing Zhiwei , Qin Tianmu , Liu Lei , Shang Yong , Gao Aiguo , Yang Zhenyong 
Published: May 2021

Abstract
As for the once-through unit using lignite, in order to meet the AGC requirements of load change, the coordinated control strategy of unit was optimized. The control strategy was optimized mainly from the aspects of steam temperature control and steam pressure control. In order to control the mid-temperature stability, strategy of using feed water and coal to correct the mid-temperature at the same time was adopted, and the feed water flow was revised by desuperheating water. Different measures including variable parameter control of turbine, rapid coal adding to improve the main steam pressure, and feed-forward adjustment of primary air pressure were taken to improve the delay of main steam pressure, and also shortens the starting time of pressure when changing load. When the unit was put into AGC control, according to the different load changing characteristics of the two modes of BLO and BLR, the variable parameters of the coordinated feedforward of each subsystem were modified. And it is necessary to dynamically adjust the correction factor according to the load fluctuation, in order to reduce disturbance of important parameters such as furnace pressure, main steam pressure, main steam temperature, etc. The application results of the control strategy in the power plant show that the optimized control logic can meet the load regulation requirements of different AGC modes for the lignite burning unit, and the steam temperature and steam pressure control effect is good in the process.
Study on lifting operation of external heat extractor based on tubular balance beam
Authors: Hu Chunying , Wang Zhuo 
Published: May 2021

Abstract
As a kind of petrochemical catalytic cracking unit, the external heat extractor is one of the key factors restricting the production schedule and time limit. In order to realize the load balance of external heat extractor in the lifting process and avoid the adverse effect of impact force on catalytic cracking performance of large equipment, a method of lifting external heat extractor with tubular balance beam was proposed. At the same time, a kind of seamless steel tube balance beam is designed according to the characteristics of the balance beam and the working conditions of hoisting. Through the stress analysis of the external heat extractor and the strength calculation of the balance beam of seamless steel tube, the rope installation point of the balance beam and the section position of the balance beam are determined, which can provide the theoretical basis and reference value for the failure analysis of large-scale lifting operations and the lifting operations of similar external heat extractor.
Research on Raman Imaging Technology Based on Surface Enhanced Raman Scattering
Authors: Zhao Lei , Zhao Tingdi 
Published: May 2021

Abstract
Raman scattering originates from the change of relative position between atoms in molecules or crystals, that is, vibration and rotation. It is an important analytical method to study the structure of molecules and solid materials. Compared with other analytical methods, Raman spectroscopy has been widely used in many fields such as chemistry, physics, materials science, life science, environmental science, medicine, geology, cultural relics archaeology, public security law and so on, because of its unique advantages such as abundant information, simple sample preparation and no damage to samples. In this paper, the principle and enhancement mechanism of SERS (Surface Enhanced Raman Scattering) are discussed, the Raman imaging technology based on SERS is introduced, and its applications in different imaging fields are discussed in detail. Finally, the existing problems of SERS biological imaging technology are discussed, and the research and application prospects of this technology are prospected.
Accounting ERP Costing System of Electric Energy Enterprise Based on Energy Saving and Emission Reduction
Authors: Wang Jing 
Published: May 2021

Abstract
The paper proposes an accounting cost accounting system for power plants based on energy conservation and emission reduction. It is found that the factory needs to improve the cost control system including environmental costs, and incorporate various subjects such as carbon trading, carbon emission reduction, and carbon tax. The cost control in the era of low-carbon economy is to determine the optimal exhaust gas temperature value under each load to further reduce the coal consumption of the generator set. At the same time, in order to reduce energy loss, the paper also proposes a costing method based on elastic network algorithm, which will amortize the environmental cost of power generation in power companies, and then calculate the cost of the project to realize the power generation of power companies.
Fracture Analysis for the Vavle disc of Nickel Based Superalloy prepared by Hot Isostatic Pressing
Authors: Zuo Dungui , Zhang Zhongwei , Lai Yunting , Zhang Guodong 
Published: May 2021

Abstract
The technology of hot isostatic pressing is combined with the mould control technology under high temperature and high pressure, which can make the powder material quickly and completely shape the complex parts of the forging parts. At the same time, the controllable loading temperature and pressure can be used to realize the preparation and regulation of the material. HIP technology has been widely used in nickel-based alloy valve spheres, valve seats, valve discs and so on. The reasons leading to fracture for the globe valve disc of nickel based superalloy prepared by HIP was analyzed by means of morphology analysis, mechanical properties test, hardness test, metallographic test and other detection means. The results show that there are more black massive carbides, original powder outlines, residual dendrite structure can be seen in the base body structure, and resulting in greater brittleness and poor impact resistance, the fracture failure first occurs under the action of several impact forces generated by the valve action, which in turn causes the sealing gap between the valve disc and the valve seat to change, resulting in the drainage of water from the high pressure side through the gap to the low pressure side, and the gap on both sides metal constitutes erosion.
Experimental Study on Lifting Technology of Hydraulic Driving Screw Pump
Authors: Yan Yongwei , Li Zhiguang , Shao Lifei , Wang Xiaofang , Liu Wei 
Published: May 2021

Abstract
With the continuous development of oil fields, high gradient wells are increased year by year, highlight problem of high gradient wells is present in the low-volume oil wells. Low-volume wells in Dagang oil field land are mainly equipped with rod pump, with serious problem of partial grinding, short production cycle, and low pump efficiency. The the low-volume oil wells characterized by directional wells and horizontal wells in beach are mainly Equipped with ESP, and the trajectories of the wellbore are more complex than the land. The pump flow rate is less than that of the motor shell, the temperature rise of the unit, the motor burned, the cable breakdown and other problems are prominent in ESP lift, and production cycle is short. In view of the above problems, research on lift technology of hydraulic driving screw pump is carried out. the hollow screw is drived by the reverse circulation Power liquid, and the lifting efficiency is effectively improved. Through the test, The system can be adjusted in the range of 0.1-0.24L/s, to meet the production capacity of 10-20m3/d; the relatively constant ratio of power liquid and production Liquid is obtained in the system under different operating conditions, The results show that the whole structure can meet the requirements of large gradient wells or horizontal wells, achieving the production requirements of high gradient and low liquid oil wells.