bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Study on the Key Hardware Development of Single-Phase Photovoltaic Grid-Connected Inverters
Authors: Ma Lei , Sun Jian , Yang Xiaomei , Sang Bingyu , Lin Yandan 
Published: June 2019

Abstract
High-efficiency inverter topology design on single-phase photovoltaic grid-connected equipment is the core of bringing considerable benefits to the society and the investors. In order to study the key hardware design of the inverter that meets the leakage current requirement and achieve the maximum efficiency, this paper analyses the H-bridge based topology (H5 and H6) and DPB topology. Firstly, this paper discusses the working principle of these topologies and concludes that the DPB topology involves fewer MOSFETs than the H-bridge based topology. Additional studies of power device analysis and other component losses in these topologies have concluded that DPB topology typically has lower power device losses at different load ratios. For instance, when the load ratio (Po / Pe) is 100, the power device loss of the H5 topology is 77 W, and the loss of the H6 topology is 68.7 W. Under the same conditions, the loss of the power device in the DPB topology is only 53.6 W.
Application of Beidou Satellite navigation technology in monitoring discharge sewage and exhaust gas of ship
Authors: Xin Guip , Gao Zheng 
Published: June 2019

Abstract
The Beidou Satellite Positioning and Navigation System (BDS) developed by China independently, has unique positioning and short message communication functions. The application of this technology provides a highly reliable and stable operation control method for detecting pollutants discharged from ships. The precise positioning and directional measurement of the ship can also realize the real-time uploading of emission data and the issuance of instructions, which realizes reliable monitoring of ship sewage discharge. This application has a positive effect on the development of China’s Beidou Satellite positioning and navigation system and on seawater environmental protection, and it is also of great significance for the standardization of ship sewage.
Research on Discharging Price of Electric Vehicle Participating in Power Grid Dispatching Considering Reverse Cost
Authors: Tingting Feng , Junqi Zhang , Guangjin Peng , Wenrui Xie 
Published: June 2019

Abstract
As a controllable load and distributed energy storage unit, electric vehicle (EV) can use electric vehicle with vehicle-to-grid (V2G) technology to realize peak load shifting. In order to study the maximum bearing price of the grid in the discharge behaviour of electric vehicles, the paper takes the lowest operating cost of the grid as the objective function, establishes the optimal unit combination model of the standby unit during the peak load. The maximum bearing price of the gird is applied to the maximum cost of scheduling electric vehicle. Then the relationship between the maximum acceptable price and the power of the electric vehicle can be obtained. With the day-ahead load forecast, the upper limit of the electric vehicle acceptable discharge price is obtained. Finally, the simulation and analysis of the proposed method are carried out by numerical examples, and the feasibility and effectiveness of the proposed method are verified.
Detection and Cause Analysis of Structural Defects in Lead Clamp Weld of Transformer
Authors: Li Zhengli , Liu Guangxing , Jian Mingjian , Feng Yunguo , Cui Weitan , Fu Tianmeng , Zhang Ruifeng 
Published: June 2019

Abstract
In this paper, the causes analysis of the cracking accident at the lead clamp weld-fusion line of transformer in the extra-high voltage substation was conducted.
On-site non-destructive detection of weld defects was carried out to determine the size and location of the defects. An anatomical analysis of the clamp sample revealed that there was serious incomplete penetration and incomplete fusion in the internal structure of the weld, which seriously affected the structural strength of the weld. The causes of welding defects were further analyzed, and suggestions for improving product quality and strengthening inspection supervision were put forward.
Numerical Simulation Analysis of Supporting Stability of Cast-in-place Piles in Pipe Jacking
Authors: Liu Zengwei , Zhou Aizhao , Hu Yuan , Sui Xiaolan , Liu Qing 
Published: June 2019

Abstract
Combined with the support excavation and pipe jacking construction of the pipe jacking working well in a section of Zhenjiang sponge city plan construction, the three-dimensional numerical analysis model was established by MIDAS-GTS, and the deformation of the supporting structure at each construction stage was analyzed. The conclusions are as follows: when the three-dimensional numerical analysis model is established, the deformation of the beam element is closer to the real situation than that of the plate element beam element; in the process of pipe jacking construction, the displacement of the supporting structure is opposite to that of the jacking direction after the Jack loads, and the displacement trend changes linearly with the magnitude of the Jack force. in the process of pipe jacking construction, the maximum displacement of the supporting pile occurs at the break of the supporting pile at the exit of the pipe jacking machine. the deformation of the supporting pile can be effectively reduced by strengthening the soil in a certain range of the opening of the pipe jacking. Through the simulation analysis of excavation support and subsequent pipe-jacking construction with concrete cast-in-place pile, the results can provide a reference for the design of supporting structure and the control of surface subsidence and deformation during construction.
Research and Analysis of Library Access Control Authentication Scheme Based on IPv6 and Location Technology
Authors: Li Panfeng , Wei Jiangshu , Zhang Di , Hu Lin , Hu Qiyao 
Published: June 2019

Abstract
With the maturity of IPv6 technology, smart campus has become a trend, and the management of libraries will inevitably become intelligent. Nowadays, libraries in many colleges and universities use the method of swiping for identity authentication, which has great drawbacks. In order to solve the defects of traditional access control technology, this paper proposes a library access control authentication scheme based on IPv6 and location technology: this scheme realizes identity authentication through IPv6 wireless local area network and WIFI positioning technology, effectively avoiding a series of authentication problems.
AES Algorithm Optimization and FPGA Implementation
Authors: Liu Yufeng , Xu Xiangyang , Su Hao 
Published: June 2019

Abstract
AES is an existing encryption algorithm with strong anti-attack capability, fast encryption speed and good portability. Implementing AES algorithms on FPGA can process data faster. In order to improve the running speed of the overall system, the re-design uses a full-flow technology to implement the algorithm. And the algorithm is optimized,finally using quartus for synthesis.
Nonlinear Simulation Analysis of the Shear Force Redistribution Performance of the RC Frame-Shear Wall Structure with Different Seismic Performance Targets*
Authors: Ao Juming , Jia Yigang , Wu Guangyu , Wu Guoqiang , Wang Huibin 
Published: June 2019

Abstract
Seismic performance design has become the basic requirement of tall building structures design, and the research on the impact of seismic performance target on the anti-side mechanism of RC frame-shear wall structure first and second anti-seismic defense lines is rarely involved. In this paper, the nonlinear finite element analysis method of degenerated three-dimensional solid virtual laminated element is adopted to consider the space synergy effect of beam-slab-column wall, and the nonlinearity of the 17-story RC frame-shear wall space structure model is designed according to seismic performance targets B, C and D respectively.
Experimental study on compressive properties of steel fibre concrete
Authors: Liu Yanjie , Ding Lin , Yang Tianyu , Wang Xunan 
Published: June 2019

Abstract
The uniaxial compression tests were carry out in 5 groups steel fibre concrete specimens for 3 kinds of curing age, and the effect of steel fibre incorporation rate and curing age was studied on the compressive properties of concrete. The results show that the compressive strength of steel fibre reinforced concrete increases with the increase of the ratio of steel fibre. When the steel fibre incorporation rate is constant, the compressive strength of the steel fibre has a small increase with the growth of the curing age. The addition of steel fibre can effectively improve the crack resistance and toughness of concrete. With the addition of steel fibre, plastic deformation ability of concrete is enhanced, and the ultimate destruction form of concrete is the shear failure with obvious oblique cross section.
Observation and Research on Seismic Response of Super High-rise Buildings
Authors: Zhou ChangXian , Zheng ShaoPeng , Ye YouQuan , Wang Hao , Fu Ping 
Published: June 2019

Abstract
With the development of social economy,the increase of urban population and the shortage of land resources,the world has set off a high-rise building construction climax,More and more population concentrated and land-saving super-high-rise buildings are put into construction and use. However,the story height of this kind of building structure is higher,the layout of flat elevation is more complex,the experience of actual earthquake damage is lacking,and the seismic design is not sufficiently based,so the damage situation of this kind of building structure under earthquake is more complex than that of ordinary regular structure. This paper mainly studies the response of super high-rise buildings under seismic force,and briefly summarizes the research methods of seismic performance of such buildings.
Research on BIM Forward Design Based on Oblique Photogrammetry Reality Model
Authors: Chen Jiao , Luo Yongquan , Du Weibing 
Published: June 2019

Abstract
With the rapid development and steady advancement of Building Information Modeling (BIM) technology in China, traditional 2D Digital Line Graphic (DLG) data cannot visually display rich 3D spatial information, and it is difficult to meet the needs of BIM forward design. Aiming at the increasing demand for 3D spatial data in municipal project design, this paper proposes a forward design method based on oblique photogrammetry reality model. Firstly, the Quadric Error Metrics (QEM) algorithm is used to lighten the reality model. Secondly, the standard model library of municipal facilities is built in CATIA, and the lightweight reality model is integrated into CATIA for fine restoration. The refined reality model can provide BIM designers with reference to features, geomorphology, etc., avoiding unreasonable spatial planning, no external reference to model monomers, and missing model space location information. It is convenient for designers to design, display, compare and modify the scheme in the same platform to improve the efficiency of BIM design. Change the delivery form of traditional surveying and mapping data results, and encourage designers to use BIM technology for forward design from surveying and mapping, and accelerate the popularization and promotion of BIM technology in the whole life cycle of the construction industry.
Civil Engineering Teaching Research Based on the Virtual Simulation Technology
Authors: Wang Gui-hua , Zhou Ji-guo 
Published: June 2019

Abstract
Apply three-dimensional virtual simulation teaching technology in the civil engineering specialized courses. The virtual simulation technology applies on undergraduate teaching, which makes the students be able to experience the engineering design, construction and experimental testing, and other operation process and the current standard in the classroom, also can understand the latest modern construction technology. Solve practical problems such as the construction process affected by seasonal factors, shortage of training equipment, update slowly and insufficient funds. At the same time, enable students to master the knowledge and skills, exercise the students’ innovative thinking.
Finite element analysis of thin-waist concrete-filled steel tubular short column under axial compression
Authors: Huang Yuning , Zheng Yongqian 
Published: June 2019

Abstract
A three-dimensional non-linear finite element (FE)model for thin-waist concrete filled steel tubular (CFST) columns is established. The mechanical properties of thin-waist CFST short columns under axial compression are analyzed. The ultimate strength and the axial load-axial curves calculated by the FE model are in good agreement with the experimental results. The FE model presented in this paper can be used for reference in the non-linear analysis of CFST columns.
Analysis of Breaking Mode of FRP Reinforced Concrete Beam and Calculation of Bearing Capacity
Authors: Yang Shuai , Xu Xinsheng 
Published: June 2019

Abstract
The application of FRP (Fiber Reinforced Polymer) in modern civil engineering is one of the new ways to solve the problem of steel corrosion. Because the stress-strain relationship of FRP bars is characterized by linear elastic characteristics, the structural properties of FRP reinforced concrete members are quite different from those of ordinary reinforced concrete members, and further research is needed. Based on the results of experiments and finite element analysis, this paper uses modern reinforced concrete structural analysis methods, combined with China’s current norms, to comprehensively analyse the FRP reinforced concrete beam’s mechanical characteristics, failure modes, fracture morphology and deformation characteristics, etc. The calculation method of the bearing capacity of the normal section of the curved member was systematically studied, and the calculation and design method for the characteristics of the FRP rib was established.
Numerical Analysis of Bolted Beam-Column Joint with FRP Reinforced at Beam-End
Authors: Ye YiLong , Zheng LianQiong 
Published: June 2019

Abstract
In recent years, some scholars suggested that the beam-end of beam-column joint of steel frame can be reinforced by fiber reinforced plastics (FRP) and filled with concrete. In this paper, the reversed cyclic behavior of this new kind of plastic hinge outward joint were studied by finite element analysis. The numerical study shows that, the plastic hinge can be successfully moved outside by reinforced beam-end as reinforced by FRP at the beam end and pouring concrete in the cavity. According to the parameter analysis, it can be found that, as the length of the FRP and the length of the concrete increased, the load carrying capacity and the initial stiffness of the joint increases, but the energy performance of the joint decreases slightly. The thickness of the FRP, paste FRP vertically or horizontally has slightly influence on the cyclic behavior of bolted beam-column joint with FRP reinforced at beam-end.
The Hamiltonian System Method for a Cylinder under the Action of Gravity
Authors: Yan Guifeng , Zhang Weixiang 
Published: June 2019

Abstract
The classical problem of a viscoelastic circular cylinder under its own weight is analysed in the Hamiltonian system. On the basis of the theory of state space for axisymmetric problems and the application of dual variables of stresses, the technology of variable separation can be used. Hence the fundamental solutions, zero eigenfunctions and non-zero eigenfunctions, are derived. Because of the integrity of the solution space, various boundary conditions can be described by certain combinations general eigenfunctions. By using the adjoint symplectic relations, the eigenfunction expansion approach is applied to satisfying the boundary conditions.
Prediction of Failure-Time for Soft Rock Tunnels based on Monitored Convergences
Authors: Feng Xianda , Jimenez Rafael 
Published: June 2019

AbstractPredicting the failure-time for soft rock tunnels is an issue of great significance for disaster prevention and mitigation. The inverse-velocity (INV) method, which uses the rates of displacement to predict the failure-time, is often applied to predicting the failure-time of rock slopes. And the slope (SLO) method, which predicts the failure-time based on the slope (gradient), is another method for the same purpose. In this study, the validity of these two methods to predict failure-time of tunnels was evaluated by applying them to predicting the failure-time of the Ayas tunnel. The results show that the failure-time predicted by the INV method is closer to the actual failure-time compared with that predicted by the SLO method.
Calculation method of multi-regional power grid investment capacity based on debt-to-asset ratio
Authors: Lu Yanchao , Wang Yudong , Yang Jiale , Wang Yongli , Huang Yujing 
Published: June 2019

Abstract
Under the background of the new reform and regulation of electric power enterprises’ operation mode, the study on the investment capacity of an electric power enterprise is becoming increasingly urgent. At the same time, the enterprises are facing problems, e.g., it is difficult to allocate investment considering that electric power systems in different areas have different investment capacities. On this basis, an assessment method for the investment capacity of a multi-area electric power system is proposed based on debt - to - asset ratio. First, the comprehensive benefits are assessed. Then, the allocation coefficients are calculated by combining asset factors and performance factors, according to which the benefits are allocated. Accordingly, the investment capacities of electric power systems in different areas are calculated based on debt - to - asset ratio. Through the analysis of a case study of one city-level electric power enterprise, the investment capacity in the future is forecasted, which can provide reference for the investment plan of the enterprise.
The Research on the Consistency of the Testing Accuracy for Smoke Measuring Equipment Based on Ionization Chamber Principle
Authors: Wang Tingting , Yang Xinyan , Dai Miaomiao 
Published: June 2019

Abstract
A convenient method is proposed here to determine the relative accuracy of measuring ionization chamber (MIC). A non-dimensional quantity is presented here to characterize the relative accuracy of the testing MIC to the standard sample. Fire alarm with good repeatability and azimuth stability is used as the standard sample. The response threshold of the MIC to be measured is compared with that of the standard sample to determine its error and accuracy. This work may be benefit to testing laboratory, system manufactory and standard revision personnel.
A Fault Section Location Method Based on Matrix Beam Algorithm
Authors: Jianwen Zhao , Yanxin Ma 
Published: June 2019

Abstract
A fault segment localization method of resonant grounding system based on matrix beam algorithm is proposed. Analyzing the difference of the positive-sequence real-time current in the fault-added state between the upstream and downstream of the fault point when a single-phase ground fault occurs in a small-current grounding system. The criterion of the fault section is that the positive-sequence real-time current mainly flows through the upstream of the fault point. On this basis, the matrix beam algorithm is used to extract the instantaneous positive-sequence real-time power frequency amplitude of each detection point on the fault line of the resonant grounding system, and the area between two adjacent detection points with the largest amplitude difference on the fault path is the fault section.In addition, the effectiveness of the method is verified by the built matlab model.
The Algorithm of Local Modulus Maximum Detection Based on B-spline Wavelet
Authors: Jianwen Zhao , Hou Hui , Gao Shupin 
Published: June 2019

Abstract
At the time of fault, the system signal performances singularity, and the fault state can be diagnosed effectively through effective analysis and identification of singular signals. In this paper, for the problem that the singular signal modulus maximum point detection is inaccurate and the polarity is confused due to the improper selection of wavelet basis, the algorithm of local modulus maximum detection based on b-spline wavelet is proposed. B-spline scaling function is constructed by interpolation formula, the filter coefficients of b-spline wavelet function is calculated, in the process of signal decomposition of b-spline wavelet function and the effect of endpoint effect on signal singularity is removed, the signal local modulus maximum in the wavelet decomposition coefficient is extracted to accurately determine the time when the fault occurs. The result of simulation and experimental shows that the algorithm can not only detect the location of the maximum value of the singular point modulus accurately, but also distinguish the polarity of the modulus maximum and have good anti noise characteristics.
Research on Evaluation Model of Investment Efficiency of Power Grid Enterprise Under New Electricity Reform
Authors: Dong Zhang , Ruze Nuermaimaiti , Xiaoyan Song , Yu Xu , Qiong Liu 
Published: June 2019

Abstract
The three-stage DEA model was applied to study the investment efficiency of a power grid enterprise (PGE) under the reform of electricity transmission and distribution price. This research indicates that environmental variables, including GDP Per Capita and the proportion of industrial power consumption, have a significant impact on the investment efficiency of PGE. To be specific, GDP Per Capita and the proportion of industrial power consumption have a positive influence on the investment efficiencies of PGE in this research. Without environmental variables and random errors, the main reason for the low investment efficiencies of PGE was the lack of scale efficiency. In order to improve its investment efficiency, PGE should attach great significance to economies of scale and a reasonable plan of the enterprise scale.
Research on maturity of engineering project informatization management—As an example of Anhui Sanjian Engineering Co.,LTD.
Authors: Yao Deli , Zhou Rong , Fan Tengteng 
Published: June 2019

Abstract
With Anhui Sanjian Engineering Co.,LTD. as the research object, using the AHP, Delphi and CMM grading model, the index weight is calculated by Yaahp software, engineering project of Anhui Sanjian Engineering Co.,LTD. Engineering project information management maturity has carried on the preliminary judgment and set up evaluation index system of engineering project information management maturity in Anhui province.Through the comparison between the comprehensive evaluation score and the evaluation interval, it is concluded that the engineering project informatization management of Anhui Sanjian Engineering Co.,LTD. Engineering project information management maturity is at the management mode level.This paper studies and analyzes the current situation and deficiencies of engineering project informatization management construction of Anhui Sanjian Engineering Co.,LTD. engineering project information management maturity and points out the next development direction for its informatization management construction.
A Cross-current Masonry Technology for River Pole and Rock Dam in Distribution Network Maintenance and Construction
Authors: Yong Qian , Bin-Bin Zhang , Chang Lin , Xuan-Chen Long , Ling-Hong Chen 
Published: June 2019

Abstract
Some areas of the distribution network involve the installation of line poles through seasonal ditches or channels. In the design of rock dam construction, the traditional method has great resistance to water, which reduces the service life of rock dam itself after the formation of severe scouring. In this paper, the masonry technology of rock dam is analyzed, and a kind of cross-current dam masonry technology is designed to reduce the impact of water flow, which solves the problem of rock dam damaged by the impact of water flow and extends the practical service life of rock dam greatly.