bluuebunny/crossref_metadata_2025_split huggingface dataset:
Applied Research on Hinged Joint Damage Evaluation of Hollow Slab Bridge Based on Acceleration Amplitude Ratio
Authors: Shen Qiu , Kang Aihong , Xiao Peng , Gu Wan , Jin Dunjian , Chen Xin 
Published: March 2020

Abstract
With the increase of the operating life of domestic hollow slab bridges, a large number of in-service hollow slab bridges have different degrees of joint damage. In order to conduct a qualitative and quantitative evaluation of the different degrees of bridge joint damage, this article relies on the actual engineering background and studies different The dynamic response of a bridge with a hinge joint under the load of a car was determined. The joint failure location of the joint under simulated conditions was the beam end and the mid-span, and the damage levels were 25%, 50%, and 75%, respectively. Compared with relative displacement and relative opening and closing, the hinge joint disease has a greater influence on the acceleration of the beam plate on both sides of the hinge joint, and the acceleration response is the most sensitive. Therefore, this paper proposes a method to evaluate the degree of joint damage based on the acceleration amplitude ratio of the beams on both sides of the joint, which provides a new idea for the actual project to evaluate the degree of damage to the joint hinge.
Displacement-based Behavior Design Method for High-rise Seismic Isolation
Authors: Wang XiaoHuan 
Published: March 2020

Abstract
Based on the displacement-based behavior design method, this paper studies the high-rise isolation structure. Compared with ordinary low-rise buildings, high-rise buildings have more floors and longer periods. The elastic displacement angle and the elastic-plastic displacement angle are classified, the difference of the influence of bearing diameter and shape coefficient on the structural period is discussed, and the selection of isolation bearings is optimized considering the difficulties in the design of high-rise isolation structures.
Flexible flow deflectors against local scour at bridge piers
Authors: Li Huishu , Li Huang , Jin Peng , Yang Yuanping 
Published: March 2020

Abstract
In order to explore the potential application of flexible flow deflector in engineering, experiments were conducted to study the countermeasures against bridge pier protection. A three-deflector structure was proposed to improve the efficiency of reducing scouring depth at bridge piers, including one body and two wings. The performance of the proposed three-deflector structure was subjected to some preliminary laboratory tests, and satisfactory results were obtained.
Analysis of Influence of Different Parameters on Structural Stability of Beam String Beam
Authors: Yin Xunhua , Zhao Chao 
Published: March 2020

Abstract
The string beam structure is a new type of space structure, which satisfies the requirements of buildings for large spans, has good application value and broad application prospects. In this paper, the influence of the three-parameter ratio of the span, the prestress value and the number of strut on the stability of the beam string is studied. The modeling of the string member is carried out by SAP2000 software. The simulation results show that the arch structure of the stringed beam has the best stability when the span ratio is 0.25. When appropriate prestressing is applied to the structural cable, the stability of the structure will be significantly improved. The number of struts is not as good as possible. Considering the influence of the struts on the structure, choose the right amount.
Simulation Research on Passengers Behavior Evacuation Based on Future Humanized High-speed Railway Station Streamline Design
Authors: Cao Xianghong , Huang Mengxi , Wei Xiaoge , Chen Jibin 
Published: March 2020

Abstract
With the rapid economic growth and the continuous improvement of people’s living standards, people’s travel times and travel range is greatly improved. How to improve the efficiency of high-speed railway passenger station, to meet the passengers’ demands, to protect the public safety, to improve the comfort and other issues, has caused widespread concern of scholars. Based on the concept of future humanized railway station, the integrated streamline structure design of high-speed railway passenger station has been carried on, and crowd evacuation software has been used to simulate the way of passengers getting on and off. The results show that the integrated streamline design proposed in this paper is superior to the traditional design in structure and function, and can improve the utilization rate of high-speed railway station platform. The simulation of the best way to get on and off the train can save about 51 % of the station time. Time of passengers waiting and getting off the train has been greatly reduced which can effectively avoid the platform congestion caused by passenger travel safety. The integrated streamline design proposed in this paper can provide some references for the design of humanized railway station in the future.
Study on in-situ stress distribution in complex shale reservoirs
Authors: Du Zhenjing , Xu Yanchao , Yang Rui , Li Jing , Li Zhaochen 
Published: March 2020

Abstract
The shale reservoir in boxing depression has developed faults and fissures, and the distribution of in-situ stress is complex. Therefore, in this paper, studies on in- situ stress distribution of the shale reservoir in boxing depression based on the actual logging data, and maps the changes of in-situ stress and lateral pressure coefficient with the depth. The results show that the maximum horizontal principal stress in the study area is about 58∼67MPa. The minimum horizontal principal stress is about 55∼63MPa. The in-situ stress in the study area has a linear relationship with depth as a whole. The stress state accords with the relationship that the vertical principal stress is greater than the maximum horizontal principal stress is greater than the minimum horizontal principal stress. The coefficient of lateral pressure has a hyperbolic relation with depth. The research results can provide scientific basis for well pattern layout of oil and gas exploration and development in shale reservoir and reservoir reconstruction plan design.
Confirmation of Effective Influence Radius by Draining Boreholes in Fengcheng Mining Area
Authors: Jiang Wangang 
Published: March 2020

Abstract
In order to solve the problems of the drilling layout for preventing coal and gas outburst in Fengcheng mining area, using numerical simulation method to analysis the draining radius of the draining borehole, The law of stress and gas flowing around the draining boreholes was studied, meanwhile the draining radius were examined in site, the effective influence radius of draining borehole was determined in this mining area, the reasonable parameters and the important reference were provided for preventing local coal and gas outburst in the mine.
Genetic Algorithm PID Control of Solid Oxide Fuel Cell
Authors: Gu Jipeng , Wang Qianru , Lu Wenting 
Published: March 2020

Abstract
In this paper, a genetic algorithm PID controller is designed to control the output voltage of SOFC single battery. The genetic algorithm is adopted and designed to optimize the parameters of standard PID controller KP, KI and KD, so that the difficulties in parameters setting of PID are solved. The simulation results show that the designed genetic algorithm PID controller for the voltage of SOFC single battery can achieve certain and required accuracy as well as fast response speed.
Study on Similarity of Spur Gears Based on Dimensional Analysis Method
Authors: Zhu Chengli , Wang Xiaofang 
Published: March 2020

Abstract
In the process of gear development, bench test is an important and necessary method to study and exam the dynamic performance of the developed gears. But, it is very difficult to do bench test when the developed gear size is too big or too small. Such as for the big and heavy gears, it is not convenient to be moved and measured. And it will take a long time and consume much more materials and energy if we use the full-size gear to do bench test. On the other hand, too small gear size also makes the installation and measurements are very difficult in the bench test process. Sometimes, because of the unsuitable gear size, it is difficult to do bench test with the existing test equipment. Model test method can help us to solve this problem. Model test method allow us to scale-up or scale-down the size of the gear to get the similar gear model according to the similarity principle, and use it to do bench test instead of the full-size gear, and then apply the test results and rules of the model gear on the full-size gear. In order to do similar gear model test, the similar principle between the model and original gears must be established. In this paper, the similarity principle of spur gear was analysed in the respects of geometry, mechanics and kinematics with dimensional method based on the similarity theory. It provides a theoretical basis for gear model test method.
Dynamic surface control for nonlinear fractional-order chaotic systems with time delays
Authors: Cui Jiashuo , Xu Jing 
Published: March 2020

Abstract
Due to the uncertainty and randomness, the chaotic behavior of nonlinear system has become an important factor affecting the stability of the system. Therefore, it is very necessary to ensure that the nonlinear system has strong robustness against the external stochastic interference. This paper presents a new dynamic surface controller for nonlinear systems with time delays. In order to be closer to the actual engineering complex operation environment, the fractional calculus operator is added in the system. The dynamic surface control and time-delay effect is first applied to the second-order nonlinear fractional-order system. To deal with the problem of number explosion and time-delay in traditional inversion methods, a fractional-order filter and an alpha-order Pade approximation method are designed. After fully considering the tracking error, virtual control error and filtering error, the dynamic surface controller is established and its stability is verified. It can be seen from the simulation results that the system tracks the set function trajectory in finite time, and the controller has a good effect.
Simulation System of PMSM Based on Space Vector Pulse Width Modulation
Authors: Shi Jite , Ge Lixin , Li Changhong 
Published: March 2020

Abstract
This papper analyzes the mathematical model of PMSM, vector control strategy, the principle and implementation of SVPWM technology, on this basis, the simulation model of SVPWM and current velocity double closed-loop vector control system was built in MATLAB/Simulink, then the experiment’s results verify the feasibility of the design scheme. The design scheme of this paper provides a theoretical basis for PMSM vector control system in engineering practice.
Near space interceptor on-line correction research based on predictive intercept point
Authors: Chen Wenyu , Shao Lei , Chen Lulu , Tan Shili , Li Shijie 
Published: March 2020

Abstract
Aiming at the problem of large maneuvering range and difficult target detection of hypersonic target in the near space, according to the maneuvering range of predictive intercept point (PIP), this paper proposes a method to select different correction algorithms. First, The Gauss pseudospectral method is used to solve the trajectory optimization problem and the off-line optimal trajectory is generated. Then, aiming at the situation that the range of predictive intercept point is small, based on neighboring optimal control, the on-line correction method is used to find out the optimal trajectory near the off-line optimal trajectory. Finally, when the interceptor is located in a high airspace, aiming at the situation that the range of target motion is wide and the range of predictive intercept point is large, a direct force correction method based on velocity gain guidance is adopted. Simulation results verify the effectiveness of the proposed methods.
Dynamic Parameter Design Method and Application under a General Linear Relationship between Response Variables and Signal Factors
Authors: Yu Lanting , Zhang Yueyi , Zhu Hong , Mao Ting 
Published: March 2020

Abstract
In dynamic parameter design, there is often a different functional relationship between response variables and signal factors. SNR is an important tool for the parameter design of dynamic characteristics, and its estimation results change with the change of function relationships. This paper describes the dynamic parameter design method in a linear relationship between response variables and signal factors, and provides a case for verification. The results of this study are applicable to engineers and academics who need to conduct product design, process development and process optimization through dynamic parameter design.
Analysis of Synchronous Loop of Hydraulic Multi-cylinder Load of 60 MN Super Large Tonnage Compression shear tester
Authors: Liu Xishan , Li Yanmin , Wang Zhen , Zhuang Tianyu 
Published: March 2020

Abstract
In order to meet the mechanical properties testing requirements of super large tonnage bridge bearings, the 60 MN super large tonnage compression shear test equipment is specially developed. This article systematically carries out load analysis and machine working principle analysis, designs a four-cylinder synchronous control schematic diagram, adopts “master-slave control” position closed-loop feedback, adds force closed-loop feedback to improve system pressure stability, and uses AMESim simulation software to model and simulate actual operating conditions. Optimized control by using PID, the system obtains better displacement accuracy.
Motion control for an underactuated brachiation robot based on Lyapunov direct method
Authors: Liu Dasheng , Yan Guozheng 
Published: March 2020

Abstract
This paper studies a control strategy to drive a brachiation robot to realize the movement from an arbitrary initial posture to the desired target position imitating a gibbon to move from branch to branch. The main control aim is to drive an underactuated 2-DOF brachiation robot to reach the target in two action modes of swing motion and locomotion motion. Then, a brachiation motion controller is designed to consist of two control processes in which one is used to drive the brachiation robot to move from the suspend posture to the target position via a Lyapunov method, and the other is to ensure that the end of the link of the robot can reach the target bar through direction feedback control. Finally, some experimental results show that the control method can succeed to control a brachiation robot to achieve successfully the movement from one bar to another adjacent bar in two different cases.
Analysis of Influence of Nozzle Structure on Flow Field in Pulverized Coal Gasifier
Authors: Gao Xianbo , Yang Xiaoguang , Guo Fei , Lv Wenbo , Jiang Zhipeng , Jin Yingai 
Published: March 2020

Abstract
The three-dimensional model of the pulverized coal gasifier was established, and the internal flow field of the pulverized coal gasifier was simulated by CFD software. The variation of the velocity field and vector field inside the gasifier was observed when the angle of the guide vane in the nozzle structure gradually increased. Through the comparative analysis of the simulation results of the angle between the guide vane and the axis of 20°, 30°, 40° and 50°, the following conclusions can be drawn: as the angle of the guide vane increases, the lateral diffusion capacity of the airflow at the nozzle exit increases, and the longitudinal diffusion capability decreases. Therefore, after comprehensive consideration and contact with the actual gasifier size, this paper considers that the angle between the blade and the axis is optimally 40°-45°.
Topology Optimization Design of a 914 Mechanical Tee Based on SIMP
Authors: Peng He , Liu Huan , Yao Wenzeng , Zhang Shimin , Wang Yingying 
Published: March 2020

Abstract
A topology optimization design was created forthe key parts of the mechanical tee to find a solution to the challenge posed by its substantial weight and complicated local structure. In this paper, a SIMP algorithm is used as the theoretical basis for the topology optimization, and the numerical simulation was performed by Matlab. Furthermore, it was concluded that the filter radius and density penalty factor were the crucial criteria that affected the optimization result, allowing the relevant parameters of the optimization software to be adjusted. The topological optimization software was used to optimize the upper and lower shells of the mechanical tee, while the weight of the tee was reduced by about 20% without reduce in strength.
Development of Multi Micro Holes Synchronous Rotating and Vibration EDM Machine Tool
Authors: Mao Xiaowen , Yang Xuguang , Zhang Mingfang , Zhu Zhenjie , Huo Mengyou 
Published: March 2020

Abstract
In order to solve the problem of low efficiency of single electrode discharge machining, complex process and limited machining quality of group electrode array hole machining technology in traditional micro EDM machine tools, a multi-micro-hole synchronous rotating and vibration EDM machine tool was developed. The machine tool is composed of a mechanical platform and a control system. It can realize multi-electrode independent micro-energy pulse discharge, real-time detection of each electrode gap state and servo feed adjustment, and synchronous rotation assisted vibration of each electrode. The mechanical platform of the machine tool consists of servo feed mechanism, vibrating mechanism and multi-electrode synchronous rotating mechanism. The structure optimization and stability analysis are carried out by ANSYS finite element analysis software to ensure that the design of each part of the machine tool is reasonable and reliable. The control system is composed of motor control module, servo motion control module and pulse power module. It uses STM32F103RCT6 MCU to detect the machining state in real time and coordinate the work of each module, and uploading the processing data to upper computer. The Experimental tests show that the machine tool has high machining efficiency, stability and precision, and high degree of automation.
Compensation method of lever arm effect based on multi-accelerometers
Authors: Tan Qiangjun , Cheng Yongsheng , Tang Bin , Zhou Hao , Li Yinxin 
Published: March 2020

Abstract
In the wind tunnel model angle of attack test, the lever arm effect caused by the model vibration will greatly affect the attitude measurement accuracy. For the centrifugal acceleration term, there will be residual rectification errors using the low-pass filtering method; for the tangential acceleration, because of the same frequency as the attitude angle, the low-pass filtering method cannot filter it out. The mechanical compensation method will dramatically increase the compensation error of the tangential acceleration term due to the differential calculation. Aiming at the removal of the centrifugal acceleration term, this paper demonstrates that the error of the mechanical compensation method is far less than the low-pass filter method in the wind tunnel test environment. Aiming at the removal of the tangential acceleration term, this paper proposes a compensation method based on multi-accelerometers, which avoids the error amplification caused by differential calculation. Through theoretical derivation, analysis and simulation, the proposed method significantly improves the compensation accuracy of the lever arm effect.
Study on the Impact of New Urbanization on Land Intensive Use--A Case Study of Shaanxi Province
Authors: Liu Qiuman , Ma Yifan 
Published: March 2020

Abstract
As a national strategic implementation, new urbanization will inevitably change the disorderly urbanization in the past. Therefore, the problem of land intensive use in the new urbanization process is inevitably the top priority. Therefore, this paper analyzes the impact of the new urbanization of Shaanxi Province on land intensive use. The study found that: economic urbanization can promote land use efficiency; population urbanization will promote land input intensity; spatial urbanization can promote land use intensity and land use efficiency.
Evidence Verification Optimal Design and Practice of Electronic Health Card System Based on FSM
Authors: Zhang Heng , Ye Ziran , Xiao Bing , Huang He , Li Jian , Zhang Yaoyuan 
Published: March 2020

Abstract
With the health of China’s “Internet + medical" to facilitate the work of the people deepen, the National and Provincial Health Commission has also accelerated the “one card (code) connection" of the electronic health card, meanwhile, the empirical verification of the electronic health card is more important. The empirical verification of the electronic health card involves children, adults, including mainland Chinese residents, Hong Kong, Macao and Taiwan residents and foreigners. The verification logic is very complicated. This paper introduces the FSM technology, combined with the design mode of “micro service + application open platform + light application", optimizes the empirical verification of the traditional electronic health card management system, puts forward the development mode and five-tier architecture mode based on the FSM, and optimizes the existing empirical verification process of card issue and using. These measures have positive roles in promoting to achieve the mutual information of diagnosis and share treatment services across medical institutions.
Research on the Construction of Index System for the Influence of New Urbanization on Land Intensive Use
Authors: Liu Qiuman , Ma Yifan 
Published: March 2020

Abstract
Shaanxi province accounts for a quite significant status in the stategy for the development of the northwest,which as a bellwether in northwestern five provinces.Therefor,the development of Shaanxi province is of great siginificant in the development of the national.The new-type urbanization is inevitable different from the former,which as the formulation of national strategy and implementation.The problem of intensive land-use is widely concerned in the progress of new-type urbanization of Shaanxi province. Therefore, this paper uses scientific methods to establish an index system for new urbanization and land intensive use.
Research on Electricity Transmission and Distribution Price Calculation under Electricity Regulation
Authors: Ma Qian , Shi Jing , Li Bingjie , Fan Anjie , Cheng Chen , Wang Siyu , Chen Meng 
Published: March 2020

Abstract
The new round electricity system reform leads to changes in electricity supervisory environment. Further, the reform on electricity transmission and distribution price has new objective. Under such background, this paper establishes scientific and reasonable electricity transmission and distribution price calculation model, collects data and carries out electricity transmission and distribution pricing. Based on calculation results, this paper carries out parameter sensitivity analysis on electricity volume (uncertain regulatory parameters) and main regulating parameters, and gets sensitivity ranking of each pricing parameter of electricity transmission and distribution. Through study, the electricity transmission and distribution price calculation model and sensitivity analysis model for price influence factors under new electricity supervision are formed, providing ideas and opinions for electricity transmission and distribution price calculation.