bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design and Static Analysis of Long-span Steel Truss Suspension Bridge
Authors: Geng WB , Yi Q , Yang YH , Li C , Kang YB , Cui PP 
Published: April 2023

Abstract
In order to effectively improve the structural safety status of suspension bridges, this paper proposes a design and static analysis method of long span steel truss suspension bridge based on Midas civil finite element calculation software. Taking the Guojiatuo Yangtze River Bridge as a case, the paper studies the mechanical characteristics of the key parts of the bridge in the completion state and operation stage, and determines the structural safety state. The results show that the minimum safety factor of main cable is 2.64, and the minimum safety factor of the suspender is 3.90, and the maximum downward deflection of the main beam is 1.231m < L/400. The structural strength and stiffness can meet the design requirements.
Numerical Study on the Evolution Law of Explosion Response of Extra-wide Self-anchored Suspension Bridge under the Influence of Concrete Shrinkage and Creep
Authors: Zhou GP , Lin ZC , wang MY , Fan J , zhang YY 
Published: April 2023

Abstract
In order to deeply reveal the evolution law of explosion response of super wide self anchored suspension bridge under the influence of concrete shrinkage and creep, the evolution law of explosion response of extra-wide self-anchored suspension bridge under the influence of concrete shrinkage and creep is studied by simulation experiment. Based on a real bridge, the dynamic response of vertical displacement of the bottom plate of the bridge under explosion load at different ages is analyzed by numerical simulation. Firstly, the refined finite element model of the whole bridge is established by using SolidWorks software and Hypermesh software; Secondly, the explosion load is applied by ANSYS/LS-DYNA software and *LOAD_BLAST_ENHANCED (LBE) method, and the reliability of the calculation method is verified by combining the explosion test results of concrete members in the literature; Finally, the dynamic response of the bridge at different ages is analyzed by modifying the elastic modulus of the material to make the main girder reach the linearity predicted in the literature. The results show that under the action of explosion shock wave, the stress of the concrete element on the top plate of the main girder reaches the limit value and fails, forming an elliptical breach. With the increase of the age of the bridge, the vertical displacement of the bottom plate in the middle of the bridge span increases continuously, and the growth rate is “fast in front and slow in back”, which is consistent with the impact of concrete shrinkage and creep on the bridge. The results of this paper can provide an important basis for the anti-explosion protection and reinforcement of concrete extra-wide self-anchored suspension bridge.
Research on Seismic Reduction and Isolation Design of Prefabricated Viaduct in Areas of High Seismic Risk
Authors: Zhan YY , Deng XW , Dang XZ , Luo XH , Zhang CN 
Published: April 2023

Abstract
Seismic isolation design is an effective and economical method to protect precast viaducts from severe earthquake damage. Correct selection of bearings is one of the common methods to achieve this goal. In order to optimize the vibration isolation performance of prefabricated viaducts, this paper compares the vibration isolation performance of lead rubber bearings (LRB) and laminated bearings (LB). The lead rubber bearing (LRB) and laminated bearing are respectively applied to the same analysis model of prefabricated viaduct. The seismic responses of bearings and structural members are analyzed by dynamic analysis method, and the typical seismic responses, including internal force, displacement, hysteresis curve and residual deformation, are compared. The results show that LRB has higher isolation efficiency and better self centering ability.
Research on Optimization Design of the Mix Proportion of Xiamen Second East Passage Tunnel
Authors: Liu JH , Zhu YM , Chen XH , Liu S 
Published: April 2023

Abstract
Because of the poor hydration heat and shrinkage of the tunnel constructed in sections, structural cracks are easy to occur, and the concrete mix ratio is very important. In order to achieve accurate concrete mix proportion, the paper has optimized the concrete mix proportion of Xiamen East Second Passage. The early mechanical properties and impermeability of the concrete before and after the optimization of the mix ratio were tested. The results show that the cement content in the original design mix proportion is high, the early strength of concrete is excessive, and high hydration heat and shrinkage are easy to occur during construction. The early mechanical properties and impermeability of the optimized mix proportion concrete can meet the design and construction requirements. The conclusions can provide guidance for the construction of similar projects.he construction of similar projects.
Rapid Intelligent Risk Assessment of Bridges under Typhoon Disasters
Authors: Yuan JC , Liu XL , Ding Y , Wang XJ , Cao ZB , Zhou JH 
Published: April 2023

Abstract
In order to improve the risk early-warning performance of highway bridges caused by typhoon disasters, a fast and intelligent risk assessment model for highway bridges is proposed in this paper. A three-level accident possibility index system is established in which the top-level index is the possibility of bridge accident, the second-level indices comprise the accident causing factor, the surrounding environment factor, and the accident bearing body, and the third-level indices are selected from the disaster conditions and the bridge’s own technical conditions. With the rapid risk assessment model of highway bridges under typhoon disasters, the intelligent risk assessment software platform is developed. In the case analysis, the automatic and intelligent risk assessment of highway bridges in Ningbo under Typhoon “Lekima” on August 10, 2019, was realized.
Temperature Effects on Steel Truss Structure under Different Bearing Stiffness Conditions
Authors: Fan DL , Xiao F , Fan J 
Published: April 2023

Abstract
The temperature response of steel truss structure is affected by the boundary conditions. If the stress caused by temperature cannot be completely released, the structure may be damaged. In order to deeply reveal the laws of temperature and steel truss structure under different boundary conditions, this paper studied the influence of temperature on steel truss structure under different boundary conditions through experiments. First, the temperature effects on a sample member under different bearing stiffnesses were investigated using the stiffness method. Second, a truss structure finite element model was built to study the temperature response. The results indicated that the maximum axial stress of the member significantly decreased when the boundary condition of the structure was transferred from the fixed to a roller bearing.
Analysis of Damage Mechanism of Heihe Bridge during the Maduo Earthquake
Authors: Huang Y , Yin MC , He J , Cai LW 
Published: April 2023

Abstract
It is of great significance to discuss the earthquake damage mechanism of the bridge. In this paper, the seismic damage mechanism of Heihe Bridge is analyzed based on the post earthquake data. Firstly, the seismic response of Heihe Bridge is analyzed based on the finite element software Midas/Civil, and the model of Heihe Bridge (upward) is established using the data of Dawu strong earthquake records near the bridge site; Then, the influence of bridge connecting plates on the seismic response of small and medium span simply supported girder bridges is studied, and the models with and without connecting plates are established. Finally, through the experimental analysis of the ground motion response, the internal force relationship between the connecting plate and the substructure of the bridge is discussed. The results show that:1)Abutment plays an important role in restraining the displacement of main beam along the bridge. Bridge connecting plate is an important seismic measure. (2) Using the three-dimensional ground motion simulation method of random finite faults, the seismic response analysis of the given USGS ground motion can better simulate the failure mechanism of the bridge. (3)The seismic response of the structural system is determined by the different layout of the bridge deck.
Experimental Study on Load of Continuous Steel Truss Bridge Stiffened by Rigid Suspension Cable for Highway and Rail
Authors: Bai GL , Ke P , Liu X , Ran YC 
Published: April 2023

Abstract
In order to reveal the stress law of rigid suspension stiffened continuous steel truss bridge under highway and crowd loads, a highway rail bridge is taken as the supporting project, and the load test method is used to verify it. Firstly, the completed bridge state (the dead load of the lower track) is simulated by laying water bags on the lower deck, which solves the problem of asynchronous construction of highway and track. Then, the stress, deformation results and change rules of this kind of bridge under the test load are summarized by simulating the load action of highway and crowd through the loading vehicle, which can provide a reference for the load test of similar bridges.
Technical Architecture and Evolution Analysis of Measurement Data Sharing for Power IoTs
Authors: Liang J , Zhu S , Lin H 
Published: April 2023

Abstract
With the development of the Internet of Things (IoT), a large number of devices are connected to IoT. Traditional data sharing architecture is increasingly unable to meet business needs. In order to solve this problem, the paper integrates the measurement data of multiple systems, and proposes a new data sharing architecture with the Internet of Things Management Platform (ITMP) and the real-time measurement center as the core. The architecture realizes unified access and management of equipment through ITMP, avoiding problems such as data analysis difficulty, complex data collection process and big data delay when multiple systems access data. Then, the measurement center realizes fast real-time data processing and distributes the data to different applications to improve data utilization and productivity. The application results of this architecture in the actual environment show that the active maintenance and active maintenance of the distribution network under the new architecture reduce the time for fault diagnosis of the distribution network from 10 minutes to 1 minute, and support the transition from passive to active.
Ground Fault Identification in Distribution Network Based on MMC Injection Detection Signal Strategy
Authors: Liu WH , Liu YC , Wang JJ , Wang YX , Lun D 
Published: April 2023

Abstract
In order to improve the identification efficiency and accuracy of distribution network ground fault identification methods, this paper proposes a distribution network ground fault identification method based on MMC injection detection signal strategy. Extract the fault information of distribution network grounding line, calculate the current component of three-phase current, and obtain the grounding fault data of distribution network.The detection current of distribution network is obtained by injection signal detection strategy. The fault information matrix is formed by using the detection current information, and the time-frequency characteristics of MMC injection detection signal strategy are obtained according to the actual situation.The wavelet transform is used to remove the clutter in the fault feature vector, and the normalized processing is used to obtain and process the ground fault vector.According to the wavelet function, the characteristics of the distribution network ground fault signal are determined. Cassie model and Mayr model are used to obtain the final distribution network ground fault identification model to realize the distribution network ground fault identification.The experimental results show that the accuracy of the method can reach 96.1%, and the time of fault identification is only 25s. The above results show that the method can effectively improve the effectiveness of distribution network ground fault identification.
Evaluation and Reinforcement of Prestressed Concrete Hollow Slab Bridge after Fire Damage
Authors: Huang XX , Zeng Y 
Published: April 2023

Abstract
The bearing capacity of bridges after fire cannot be clearly defined, and the bearing capacity of bridges after fire cannot be evaluated by actual bridge load tests. In order to solve this problem, this paper studies the actual bearing capacity and reinforcement methods of hollow slab bridges after fire, combined with practical engineering cases. During the operation period of 16m span prestressed concrete hollow slab after fire detection, the bearing capacity is calculated according to the appearance, rebound strength, carbonization depth of the fire zone of the hollow slab and pier, as well as the compressive strength of coring, the tensile strength of steel, the natural frequency of vibration, dynamic strain and deflection of the hollow slab; The research results show that the bearing capacity of bridges after fire calculated by this method is more accurate, and the reinforcement scheme is formulated according to the calculated bearing capacity, which has achieved good results after reinforcement. It providing a reference for the detection and reinforcement of similar bridge diseases.
LCS-based Visual Recognition for AGV Guide Paths under Complex Illumination Conditions
Authors: Wang ZM , Li M , Gao C , Jin XM 
Published: April 2023

Abstract
Complex lighting is one of the most challenging problems in automatic guided vehicle (AGV) vision recognition system. In order to overcome the influence of uneven illumination on the accuracy and robustness of path recognition, this paper proposes the LCS based visual recognition for AGV guide paths under complex illumination conditions method, which converts the collected image into an invariant image through logarithmic chromaticity space (LCS) to eliminate the influence of illumination, and the minimum average entropy angle is used as the projection angle to generate the invariant image to improve the speed of image conversion to the invariant image. Experimental results show that the proposed method can effectively improve the robustness of AGV vision recognition system under complex lighting conditions.
Terminal Access Method of Power Equipment Based on eSIM in WSN Environment
Authors: Fu YF , Zhang XM , Yang ZP 
Published: April 2023

Abstract
To ensure the integration of wireless sensor network and broadband wireless communication network, we establish a new generation of power IoTs information communication system for smart grid, and propose a distribution automation terminal solution based on eSIM card. An adaptive access algorithm based on multi logic eSIM priority, and a WSN based power acquisition system architecture, are also put forward. Then, according to the statistical analysis results of service arrival, the dialing and location information are integrated into one module. Through terminal classification and mobile modeling, a remote management mechanism based on EUICC is finally established. The system simulation test results show that the strategy adopted in this article can reduce the terminal access blocking rate in heterogeneous network environment, and the support of eSIM in WSN environment increases the integration of power equipment.
Design of Data Quality Control System Based on ETL
Authors: Wang XP , Li JY 
Published: April 2023

Abstract
Aiming at the problems of incremental data extraction and task scheduling in ETL processing, an optimization strategy based on data quality control is proposed. We discuss the common mechanisms of data incremental extraction and quality control in the ET subsystem of data warehouse, and propose an incremental data extraction method based on key attribute comparison. The key functions of ETL data extraction is utilized, and the database incremental extraction method is adopted. During the process of data processing, the problem of data loss is solved by means of auxiliary tables, and the problem of data quality at the instance level is solved by data cleaning. Finally, the experimental results on real data sets show that the ETL design with quality control optimizes the overall workflow and ensures that data can be accurately extracted into the data warehouse.
Resource Allocation Optimization Algorithm of Power 5G Network Slice Based on NFV and SDN
Authors: Wang Qian , Zhang Yanan , Wang Xuanzhong 
Published: April 2023

Abstract
To realize 5G network slicing, the virtual resource scheduling and allocation method based on NFV and SDN is designed. The scheme comprehensively considers 5G communication technology and network slice structure, and establishes the optimal mathematical model of network slice operation economy. Then the network functions and resources are virtualized by NFV and SDN, the greedy algorithm is adopted to solve the mapping problem of network slices, and the specific implementation algorithm is provided. The simulation results show that the allocation algorithm can customize the management of network slice resources, achieve flexible control and sharing of network traffic and resources, and significantly promote the construction, optimization and promotion of 5G mobile communication network architecture.
Fast Access Method of IoT Smart Terminal Based On C/S Architecture
Authors: Sun F , Zhu S , Lin H , Xu N , Li H 
Published: April 2023

Abstract
In order to achieve efficient access and fast access of intelligent terminals, this paper proposes a fast access method for intelligent terminals of the Internet of Things based on C/S architecture. First, a terminal auto configuration program is developed; The automatic configuration program sends application configuration information to the configuration server; Then, the server verifies the identity of the terminal and feeds back the corresponding configuration information. Finally, the automatic configuration program automatically configures the terminal according to the feedback information and accesses the Internet of Things management platform. The experimental results show that this method can realize remote distribution of terminal configuration information and automatic configuration of terminals. Compared with traditional methods, the terminal access time can be reduced by about 70%.
Research on Energy Extraction Devices Based on High-Voltage Line Monitoring Technology
Authors: Lin Zhuang , Zhang Guangxin , Li Cheng , Cui Yuxin , Li Shilin , Zhou Fulin 
Published: April 2023

Abstract
With the construction and development of an intelligent power grid, the voltage level of transmission lines is constantly improved. The distribution of power grids is increasingly broad, the climate environment along the transmission lines is complicated, the safe and reliable operation of transmission lines is facing significant challenges, and the inspection and maintenance workload of transmission lines is also increasing. Currently, only 20% of the online monitoring devices of transmission lines installed by the State Grid can operate normally. Power failures cause the most. It can be seen that it is necessary to develop an efficient and reliable power supply to improve the reliability of online monitoring devices of transmission lines. In order to enable the transmission lines to operate independently without maintenance for a long time, now the power grid needs an energy harvesting device with good stability, high energy harvesting efficiency, and strong resistance.
Different non-isolated photovoltaic (PV) inverter topologies can suppress leakage currents
Authors: Zhang Yuxin 
Published: April 2023

Abstract
In recent years, due to various environmental protection policies and the popularity of new energy sources, photovoltaic power generation has been strongly encouraged and developed at home and abroad. Suppressing leakage current is a key issue for non-isolated PV grid-connected systems. This paper analyzes various circuit topologies proposed to suppress the leakage current based on the bridge structure. This paper will compare and analyze the representative circuit topologies among them, comparing their circuit diagrams, operating principles, pros and cons, and so on. The leakage current can be effectively suppressed by bipolar modulation, but it will produce great electromagnetic noise and full harmonic distortion, reducing system efficiency. The HERIC circuit has the highest conversion efficiency and the best leakage current suppression effect among the three half-bridge structures and three full-bridge structures summarized in this paper. By summarizing and comparing, future research efficiency will improve when similar problems arise.
Research on the Optimal Design of a New Hybrid DC Energy Dissipation Valve
Authors: Hu Yongjie , Xia Kepeng , Zhang Lei , Li Chengyu , Li Shuya 
Published: April 2023

Abstract
DC energy dissipation valve is the core equipment of offshore wind power flexible and direct transmission system. It is of great significance for protecting the operation safety of converter valve equipment and restraining the over-voltage of the DC bus in case of an AC fault at the receiving end. However, DC energy consumption device has many topologies and novel structure, and their equipment construction cost and operation reliability are one of the important factors limiting their engineering application. In this paper, the topological structure of a hybrid DC energy consumption device is studied, and the distributed resistance parameters of a hybrid DC energy consumption device are optimized. Based on the optimization scheme, a new switching control strategy and voltage sharing strategy are proposed, which improves the technical and economic efficiency of hybrid DC energy consumption devices. The feasibility of the proposed measures is verified through simulation and experiment, which is of engineering significance.
The leakage current suppression of transformerless three-level photovoltaic grid-connected inverter
Authors: Dong Shi , Liang Jiajun , Yang Jiaxin 
Published: April 2023

Abstract
Transformerless PV grid-connected inverters, although simple in construction and highly efficient, suffer from serious current leakage problems. There is no electrical isolation between the PV panels and the grid, and the parasitic capacitance causes the inverter to form a common mode loop with the earth, creating strong resonances in the high-frequency range and generating huge leakage currents. Today, the two main methods of leakage current suppression are topology and modulation. This paper observes leakage current suppression by comparing two modulation methods, SVPWM and 3D-SVPWM. In the case of the LCCL filter, the conventional SVPWM modulation causes the common mode voltage to oscillate at high frequencies of the order of magnitude of the carrier frequency, causing large leakage currents in the common mode loop. With 3D-SVPWM modulation, however, the common mode voltage pulses are equal in the positive and negative areas, attenuating the CM resonance and balancing the NP voltage, thus producing a smooth common mode voltage and effectively suppressing high-frequency leakage currents.