bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design and Implementation of Ground Terminal for Aerial Radio Monitoring System Based on UAV
Authors: Zhou Chao , He Songru , Ye Jia , Jia Pingfa 
Published: November 2020

Abstract
The electromagnetic environment is becoming increasingly complex, and frequent radio interference to civil aviation has seriously affected the safe operation of civil aviation systems. In this article, the team designed a ground terminal system for an aerial radio monitoring system based on UAVs (Unmanned Aerial Vehicles), which was redeveloped based on the Mission-Planner open source ground station platform. The system used UAVs as flight platform, and used antennas, radio receivers and other hardware equipment for monitoring. The system could control UAVs and monitor radio signals. Tests such as frequency band scanning and two-point cross positioning show that the terminal system can implement the functions of controlling UAVs and radio monitoring, while effectively streamlining the number of workers and effectively improving the efficiency of detection.
Tracking Control for the Stochastic Distribution System
Authors: Qu Yi , Zhang Weiting 
Published: November 2020

Abstract
A novel controller for the SDS with time-delays is investigated in this work. The control aim is to control the system output PDFs to trace the trail of given target PDFs. Based on B-spline expansion, the PDFs control can be turned into the weight vector tracking problem, and it is to find the controller gains, in order that the system output weights can track the given target weights, and the closed-loop system is asymptotically stable.
Research on Combined Location Method of Dual Rail Inspection Vehicle Based on Adaptive Kalman Filter
Authors: Liu Changjun , Wang Daiyue , Lin Peng , Zhong Tianyi , Li Jin 
Published: November 2020

Abstract
Dual rail inspection vehicle has the function of inspecting rail defect points automatically and an odometer is required for its localization. Since real-time localization of rail defect points still needs manual calibration, it cannot meet the requirements of automatic vehicle operation. In this paper, the automatic localization methods are discussed. The Adaptive Kalman Filter (AKF) is employed for the multi-sensor data fusion of the odometer and the Global Navigation Satellite System (GNSS). Then the GNSS/odometer combined localization model has been built to improve the accuracy and reliability of the inspection vehicle localization. In addition, the hardware board is designed. Finally, the on-line test has been performed on the Shanghai-Hangzhou railway line. The experimental results show that our combined localization method can significantly improve the accuracy compared with that of the single GNSS method from 1.848m to 1.093m.
Calculation and Experimental Study on a Rotary Percussion Positive Displacement Motor
Authors: Zhang Haiping , Zang Yanbin , Wang Jiachang 
Published: November 2020

Abstract
A positive displacement motor (PDM) driven rotary percussion drilling tool, named rotary percussion PDM (RP PDM), is developed. Using conventional PDM as rotating power source, high-frequency axial impact and vibration or impact is generated to raise rate of penetration (ROP) through an impact mechanism consisting of a couple of mating cams. Strength is calculated and checked for dangerous cross-sections, and all of them meet the strength requirements. Stress distribution under different loads is analysed for the mating cam mechanism. Safety coefficients of upper and lower cams under maximum load are 3.69 and 2.36 respectively. Both are greater than the allowable safety coefficients, which prove tool’s design safety and reliability. Ground performance test shows that its overall power output parameters meet field compound drilling condition requirements. Field trials shows preferable ROP improving effect by over 30%. In Xu36A well especially, ROP is more than doubled. Therefore, the tool has positive significance to accelerate the pace of oil exploration and development and to reduce drilling costs.
Research Status and Application of Buckling Restrained Brace Technology
Authors: Liu Ping , Xu Yang , Wang Zhixin , Ma Hua 
Published: November 2020

Abstract
For the past four decades, researchers have worked upon and developed a bracing system. called the buckling restrained brace (BRB) for frame braced structures. This system counteracts compression from buckling during strong earthquakes. The system has the advantages of a common brace and damper, providing lateral stiffness to the structure under frequent earthquakes. Seismic energy can be dissipated by the steel core yield, under both rarely expected and moderate earthquakes. This paper is devoted to the concept of BRB, its components, characteristics, and its current deficiencies. It also discusses the current limitations and estimates the developing trend of this technique. It has a certain reference value for in-depth studies on BRB system.
Optimization of Die Parameters in Annular Channel Angular Extrusion Based on Strain Distribution Uniformity
Authors: Zhao Xi , Guo Lafeng , Gao Pengcheng , Wang Dengkui , Wang Zhen , Liu Jie , Zhang Zhimin 
Published: November 2020

Abstract
In this paper, a recently developed backward extrusion method enforcing severe plastic deformation is modified for processing cup-shaped part with homogeneity strain. Variation of channel angles (Φ) and corner angles (Ψ) have been employed to obtain a better strain distribution. The performance is analyzed using finite element modeling Deform 3D commercially available software. To verify the simulation results, the experiment was carried out for AZ80 magnesium alloy. The present work investigates effective strain distribution behavior, analyzed by several strain regions during the forming process. Furthermore, the influence of different channel and corner angles on the strain distribution uniformity of the wall in the formed part is especially evaluated. The best strain homogeneity is obtained with Φ=75° and Ψ=60°. Particularly worth mentioning is that the strain uniformity achieved by this novel method is better than that obtained in the conventional backward extrusion. While the smaller corner angle (Ψ) can develop gradient effective strain distribution, adversely affecting the strain homogeneity.
The Design of a Double X-axis Gantry Bayonet Tufted Carpet Weaving Machine
Authors: Xin Haiming , Xie Yonghui , Li Haiqing , Song Pengfei 
Published: November 2020

Abstract
In order to achieve high-quality and high-efficiency production of hand tufted carpets, a gun-punched tufted carpet weaving machine is designed in this paper. The carpet weaving machine is based on the development of Advantech industrial computer and Googoltech GTS-800-PG. The designed double X-axis gantry frame ensures continuous production speed of up to 1500 clusters per minute. The precise frame transmission mechanism realizes smooth curves, sharp Angle and small stitch angle movement under high density. This article mainly introduces composition of the control system and the design of overall mechanical structure of the carpet weaving machine, and looks forward to the development trend of the machine.
Simulation Analysis of Steering Wheel Angle Step Input Double-trailer Combination Handling Stability
Authors: Li Yue , Zhang Hongwei , Zhang Hao , Zong Chengqiang , Ou Chuanjin , Zhang Xueli 
Published: November 2020

Abstract
The simulation software TruckSim was applied to build a simulation model of a double-trailer combination and analyze the steering characteristics of a semi-trailer train at the steering wheel corner step input. Through simulation analysis under different speeds and structural parameters, the intrinsic relationship between the steering characteristics of double-trailer trains and the speed and structural parameters is revealed, and the performance characteristics of the steering characteristics of double-trailer trains under these conditions are given, which provides reference for the evaluation and analysis of the steering stability of double-trailer combination.
Precision Machining and Nondestructive Evaluation for Tiny Arc of a Valve Body
Authors: Wang Kun , Huang Zongbao , Meng Qingxin , Ran Jiangnan , Pen Hongmin , Gao Ben 
Published: November 2020

Abstract
The valve body is one of the key parts in the solenoid valve products, which mainly plays the role of seal. Due to the airtight index, the tiny arc structures of the valve port are complicated, which causes the high requirements of dimensional accuracy, geometric tolerance and the surface roughness of the product and difficulty of machining and inspection. Traditional processing method can not meet the demand of batch and rapid production. This paper presented a new method of precision machining and inspection for tiny arc, which realized the precision machining and nondestructive evaluation of Ra0.2 roughness and R0.2mm arc surfaces of valve bodies with GYJ130 soft magnetic alloys. The processing methods greatly reduced the requirements for the skill level of operators. The experimental results showed that the machining efficiency of valve body was increased at least three times, and the qualified rate was increased from 60-70% to more than 96%, while the cost of production and material were reduced proportionally.
Analysis of the Explosion of Dissimilar Steel Joints in the 1050MW USC Boiler
Authors: Yang Qingxu , Shi Xiaoming , Yang Chao , Yang Xianbiao , Peng Hongwei , Liu Xubi , Wan Yu , Zhang Xiaokang 
Published: November 2020

Abstract
The leakage of dissimilar steel welded joint near the third superheater occurred in a power plant boiler. Through the analysis of tube cutting sampling, it is considered that the welding quality of dissimilar steel joint is good, the dissimilar steel joint cannot bear the bending load, and the improper arrangement of weld joint position together cause the leakage. It is suggested that the welding joints of dissimilar steel should not be arranged in the position with complex structural stress in the design, and the inspection of anti-abrasion and anti-explosion blind area should be strengthened in the process of maintenance.
Design of Vision Guidance Transferring System for Automobile Hub Manufacturing
Authors: Zeng Zhi , Zhou Yongfu , Zhong Guosheng 
Published: November 2020

Abstract
In the era of industrial 4.0 intelligent manufacturing, improving product quality and reducing labor costs are important issues in the transformation and upgrading of manufacturing industry. For Automobile Hub manufacturing, first the whole design of software and hardware based on visual guidance is carried out; then, from the perspective of equipment communication and control, the communication between industrial robot and PC host computer is implemented by using Modbus RTU communication protocol, and PLC control frequency converter is selected to complete the control of transmission unit, and finally, the parameters of camera geometric model are obtained by software identification during the wheel hub to be transferred Now the camera is calibrated, so that the offset can be calculated further to adjust the robot’s attitude, and finally the whole process of visual guidance and load transfer can be completed through image recognition. The practice shows that the visual guidance design scheme has been successfully applied to the automatic production line of automobile hub, which improves the production efficiency of the factory and further reduces the cost.
Optimal Hermitian Wavelet Filtering and Envelope Spectrum Based Bearing Defect Diagnosis
Authors: Li Hui , Zhang Yuping 
Published: November 2020

Abstract
Local faults in rolling bearings often give rise to periodic impulses in vibration signal. The periodic impulses can be extracted by resonance demodulation technique. Therefore, the resonance demodulation technique is a popular technique of rolling bearing defect recognition and diagnosis. However, the selection of optimal band-pass filter parameter is usually more difficult. The proposed method is the union of the continuous Hermitian wavelet transform as time frequency tool and the spectral kurtosis as transient impulse indicator. Firstly, continuous Hermitian wavelet transform is utilized to process the vibration signal and the wavelet amplitude and phase diagram are obtained. Secondly, the spectral kurtosis is calculated to select the best band-pass filter parameters. The proposed procedure and spectral kurtosis are used to optimize the parameters of continuous Hermitian wavelet for bearing defect detection. The bearing failure test results show that the proposed method can effectively extract the transient features and diagnose the bearing fault.
Development of a Portable Intelligent Electric On-site Wrench Calibration Device
Authors: Zhao Yinming , Xu Jian , Chai Jixin , Hao Qun 
Published: November 2020

Abstract
In large assembly workshop, such as automobile assembly workshop, the number of the wrenches is large. Some wrenches that used in fields are scattered. It is not convenient to send all such wrenches to laboratory for calibration at the same time, so it is necessary to develop a torque wrench calibration device which is suitable for on-site calibration. An intelligent indicator with MCU was developed, which can display and record the torque value, which is convenient for operators to record the data without paper and can check the data later. The intelligent indicator can also calculate the error at the same time, which improves the work efficiency by replacing manual calculation. A DS2401 chip was hidden in the transducer. It is cheap and has an unique sequence code, which is easy to identified by MCU. The MCU seeks the codes already stored in the indicator and matches linear correction coefficient to the transducer. It is first to use DS2401 chip to realize plug and play, which can avoid the measurement error even device damage caused forgetting switch the channel. The device also has an chargeable motor, which can save time and labor especially when mechanical gap exists and load a large torque value. The main characters of the device are auto-identifying transducer, powerful data handling similar to a compute and chargeable motor. All of these guarantee the device being intelligent and efficiency for the on-site wrench calibration.
Investigation on Characteristics of Natural Fractures within Carbonate Formations and Mechanical Features of Related Tectonic Movement in a Block of Shunbei Oil Field
Authors: Chen Xiuping , Shen Xinpu , Zhang Jun , Sun Yunqiang , You Dongdong , Liu Wei 
Published: November 2020

Abstract
Investigation has been performed on natural fractures within carbonate formation in a block in Shunbei Oilfield. Classification has been done over natural fractures in the block. Patterns of distribution of natural fractures within the carbonate reservoir formation have been identified. Principal results include: 1) seismic data and sedimentation information along with history of tectonic movement have been used to analyze natural fractures. 2) It is found that natural fractures withinT74-T76 carbonate reservoir formation are generated by tectonic movement of middle Caledonian I and II periods, and are mainly through fractures/faults with strike-slip characteristics. 3) 3D finite element model was built for this block with seismic data. Numerical calculations of 3D Continuum Damage Mechanics were performed. Results of numerical forward modeling has given out the 3D distribution of natural fractures which are represented by the localization band of damage variables under loading of tectonic movement of middle Caledonian period.
Research of Physical and Mechanical Properties of Aluminum Alloys
Authors: Zhdanov A , Voznesenskaya A , Belyaev L , Novikova E 
Published: November 2020

Abstract
In this work, we studied the physicomechanical properties of aluminum alloys of various manufacturers obtained by selective laser melting. The groups of samples obtained under different melting conditions are considered. Data were obtained on the behavior of the growth of an object depending on the speed of scanning with a beam and the power of laser exposure.
Research on Articulated Connector Load Identification Based on Dynamics
Authors: Zhu Ning , He Maosheng , Zhang Qiang , Yin Yi , Ren Zunsong 
Published: November 2020

Abstract
At present, articulated vehicles are developing rapidly in China and articulated connectors are important parts of articulated vehicles. In March 2016, CRRC Qiqihar Rolling Stock co. LTD designed the GJ1 articulated connector. Due to the complexity of the articulated connector structure and stress distribution, it is necessary to study its loads in the application process. In this paper, the load identification of an articulated connector was mainly studied based on dynamic analysis. The dynamic model of the two coupling articulated vehicle was established. The relative motion relation of bump joints and the load conditions under some working conditions were analyzed. Finally, the finite element model was established and the static strength of the articulated connector was analyzed by means of the definition contact between the articulated connector parts. The results showed that the relative lateral displacement and relative side roll rotation angle of the concave and bump joints of the articulated connector were maximum in each working condition. More attention should be paid to the actual operation. The static strength of the main stressed parts of an articulated connector meet the design requirements. Since the material used for traction pin was not determined, high-strength tool steels T10 and T10A were recommended.
Influences of Construction of Balcony Structural Column on Internal Force of Frame Structure
Authors: Yang Zhihui , Lei Dong , He Jintao , Zhu Zhengguo 
Published: November 2020

Abstract
Balcony structural column is constructed as a secondary structure traditionally. Not only the construction process is complicated, but also the construction quality is erratic, which results in a large number of repairs and costs. On the other hand, the concurrent method that balcony structural column and main structure are constructed as a whole structure is more convenient for operation and benefit for the construction quality. Therefore, influences of construction technique of balcony structural column on the internal force of frame structure deserve investigation and analysis. Through comparative analysis of Construction Process and selection of a frame structure model calculation and analysis, balcony structural column and main structure are constructed as a whole structure of the useful results. Through analysis, find out synchronous construction is more conducive to improve project construction quality, more convenient construction operation.
Research on Mechanical Constitutive Model of Fuzz Button Connector
Authors: Huang Ran , Kong Zhigang , Wang Baoyou , Zhang Lei , Zhu Ming , Yang Fan , Li Xinhang 
Published: November 2020

Abstract
In this paper, the mechanical constitutive model of fuzz button connector was studied from a theoretical perspective. Based on the structure of the fuzz button, the spatial configuration and contact mode of the metallic protofilament were analyzed, and the meso structural unit of the single metallic broken-line segment based on the simply supported beam structure was proposed. From meso to the unit structure, the constitutive model of the fuzz button connector subjected to a certain compressive load was derived. Some basic parameters such as the diameter and the elastic modulus of the metallic protofilament, relative density of the fuzz button, the length and winding angle of broken-line segment, which were all included in the model. It fills the blank of the mechanical research of the fuzz button connector, and provides a theoretical basis for further research on the mechanical characteristics of the fuzz button connector and guiding the practical application.
Research on Cooperative Vehicle-Infrastructure System Use Case Based on Edge Computing Technology
Authors: Yang Yuehua , Lyu Chenyang , Wang Anna , Wang Xinke , Cai Lei 
Published: November 2020

Abstract
The ability of edge computing determines the effectiveness of the cooperative vehicle-infrastructure system to improve traffic safety, efficiency and capacity, enabling traditional information release method have backstage processing and distribution. It is converted to vehicle, road and backstage after being processed by edge computing algorithm. Vehicles are timely and effectively controlled and induced. Based on the full analysis of the development status at home and abroad and the analysis of actual engineering needs, this paper proposes the composition of the cooperative vehicle-infrastructure system and the main factors affecting edge computing, studies the existing edge computing methods, and finally combines the current smart highway demonstration projects. The actual needs put forward the cooperative vehicle-infrastructure use case research based on edge computing. The use case analysis has significant guiding role for the design, R&D and engineering implementation of the smart highway cooperative vehicle-infrastructure system in China.
Effect of Ni60-WC on Properties of NiCrAl Coating
Authors: He Binfeng , Ye Fangxia , Liu Mingxia 
Published: November 2020

Abstract
Ni60-WC reinforced NiCrAl coatings were prepared on the TC4 alloy by laser cladding technique with different mixed powders: 95%NiCrAl-5%Ni60-WC, 85%NiCrAl-15%Ni60-WC, 75%NiCrAl-25%Ni60-WC (wt.%). The microstructure, phases compositions, microhardness, wear properties were studied. The results showed that the mainly consists of dendrites and bulk like compounds crystal and some of flower-like microstructure formed. The XRD results indicated TiC, VC metalloceramics, Cr0.2Ti0.8C, NiTi2, Ni2W4C and AlFe3C intermetallic compounds generated. The microhardness of the coatings are 881HV0.3, 778HV0.3 and 788HV0.3, respectively. Compared with the substrate hardness about 200HV0.3, the hardness of coatings have been improved significant. The friction coefficient of coatings are 0.35, 0.42, and 0.42, respectively, and the wear rates of the coatings are 3.86×10-7mm3N-1m-1, 4.51×10-7mm3N-1m-1 and 4.34×10-7mm3N-1m-1, respectively.
Determination of Mixing and Conveying Parameters in a Phosphate Rock Filling System
Authors: Li Xin , Guo Lijie , Xu Wenyuan 
Published: November 2020

Abstract
A phosphorus mine in Hubei Province adopts the roof cutting room pillar method of non rail equipment layered mining. With the extension of exposure time, the stress in the goaf further changes and the pillar has begun to damage, and the failure rate has a trend of increasing. In order to avoid large-scale goaf caving, the mine decided to adopt concrete cemented filling method to mine unstable pillars. In filling material preparation and filling system, mixing technology, equipment and conveying system play an important role. In this paper, according to the actual situation of the mine, we have carried out investigation, analysis and calculation, finally, the slurry transportation and mixing process, the pipeline transportation model and main pipeline transportation parameters has been determined. It provides a theoretical basis for the application of filling method.
New Approaches in Simulation-driven Optimization
Authors: Tenne Y 
Published: November 2020

Abstract
This paper presents a work regarding the integration of discriminant functions (classifiers) with search algorithms to tackle the problem of failed simulation runs. The discriminant output is used to guide the search towards better solutions while minimizing adverse effects. The search is managed with a trust-region approach for convergence in the presence of prediction inaccuracies. Numerical evaluations based on engineering problem show that the approach yielded better final results in the mean and median statistics when compared to reference algorithms.