bluuebunny/crossref_metadata_2025_split huggingface dataset:
Real-time Signal Light Detection based on Yolov5 for Railway
Authors: Liu Wentao , Wang Zhangyu , Zhou Bin , Yang Songyue , Gong Ziren 
Published: May 2021

Abstract
To improve the safety and efficiency of train operation, autonomous driving train have developed rapidly in recent years. Among them, the signal detection is one of the most basic functions. However, due to the small size of signal light and the complicated of the railway environment, the signal detection is still a huge problem. The existing methods, such as the approach based on Hough circle transformation, are hard to meet the practical application requirements. In this paper, a real time railway signal lights detection based on Yolov5 is introduced. And a lot of experiments were conducted to prove the effectiveness of the proposed method. The experimental results show that the proposed method achieved 0.972 for both average recall rate and average accuracy rate. Besides, the detection speed of the proposed method reached astonishing 100FPS. Overall, the detection speed and accuracy both meet the practical application requirements.
Research on optimization of the number of acoustic arrays
Authors: Wu Yan , Zong Junjun , Yang Hui , Liu Chuanxu , Wang Guangxing , Lv Caofang 
Published: May 2021

Abstract
The reasonable number of base stations in multiple acoustic array azimuth cross location is studied. In this paper, the maximum likelihood estimation (MLE) algorithm is used to discuss the problem of increasing the number of arrays to improve the positioning accuracy, and the positioning error model is given. The experimental results show that with the increase of the number of base stations, the positioning accuracy will gradually improve, but if there are too many base stations, the improvement of positioning accuracy will gradually slow down.
Design and Research of a New Clustering Algorithm for Wireless Sensor Network
Authors: Zhu Yuanjing , Chen Xiaolong 
Published: May 2021

Abstract
At present, the mainstream method to extend the life cycle of wireless sensor networks is to use clustering technology. An improved method based on multi-attribute decision making is designed for the defect of PPTC algorithm. The path cost detection is performed periodically, and the ordered weighted average operator is used to calculate the path consumption weight value and the node weight value. Finally, the Prim algorithm is used to establish the optimal cluster tree. Thus, keeping the best path is always in the optimal state of dynamic updates. The simulation results show that the improved algorithm mechanism is more reasonable than the PTTC algorithm. The network topology and transmission path are more reasonable. Each node can better share the network energy consumption and make the network run longer.
Research on low-speed collision performance of Collision resistance of different materials
Authors: Duan Bingxu , Liu Weidong , Liu Xinran 
Published: May 2021

Abstract
In order to explore the impact of lightweight materials and structures on the performance of anti-collision beams, this paper selects aluminum alloy and carbon fiber as the research objects, and analyzes the difference in low-speed impact performance of open and closed anti-collision beams for these two materials. Based on the structure of carbon fiber materials, the mechanical properties of carbon fiber materials are analyzed. At the same time, a low-speed collision model is established using numerical simulation to study the maximum intrusion amount, intrusion acceleration and intrusion force changes with time during the collision of aluminum alloy and carbon fiber anti-collision beams, And finally use experiments to verify. The research results show that the impact of the open aluminum alloy anti-collision beam and carbon fiber anti-collision beam on the fluctuation range of the collision acceleration is less than that of the closed aluminum alloy anti-collision beam; at the same time, compared with the closed aluminum alloy anti-collision beam, the open aluminum alloy anti-collision beam and carbon fiber, the maximum intrusion of the anti-collision beam is reduced by 8.2% and 18.6%; the carbon fiber anti-collision beam has the greatest force during the collision, followed by the closed anti-collision beam and the open anti-collision beam. The test results are consistent with the numerical simulation, which further illustrates the rationality of the exploration results.
Household gas stove based on multi jet tangential circle and TVC vortex structure
Authors: Wang Xiang , Zhang Renfei 
Published: May 2021

Abstract
In view of the heat loss after combustion and the single-stage direct combustion after contacting with the air caused by the simple structure of the traditional boiler frame, the project adopts the advanced TVC standing vortex technology and multi jet tangential premixed technology. TVC standing vortex technology uses its unique vortex structure to increase the combustion efficiency. As the structure of the project is a semi closed cavity structure, it has great significance for the heat after combustion It has a high interception effect. In order to improve the combustion efficiency, the multi jet tangential premixed technology is used to achieve the appropriate air coefficient in the burner. This project is of innovative significance to improve the combustion efficiency of the current gas stove.
Influence of Test Methods on Fuel Consumption of Heavy Trucks in China — From C-WTVC to CHTC
Authors: Liu Shaohui , Zheng Tianlei , Liu Zhichao 
Published: May 2021

Abstract
In order to reduce vehicle carbon emissions, the Chinese government is drafting new fuel consumption limits standard for heavy commercial vehicles. The standard will adopt new test method, which will have an impact on the results of vehicle fuel consumption. This paper compares the differences between C-WTVC and CHTC, and theoretically evaluates the impact of vehicle fuel consumption. In addition, the impact is empirically analyzed through the actual vehicle test. It is found that the heavy truck switching from C-WTVC to CHTC-HT will increase the fuel consumption by 0.2%-7.6%, and there is a positive correlation between vehicle fuel consumption and gross vehicle weight (GVW). Among them, the increase of fuel consumption is more obvious in the low speed and high speed parts of the test cycle. In order to achieve fuel consumption compliance, enterprises need to focus on low-speed and high-speed fuel consumption performance.
Design and Development of Intelligent Control System for Full Performance Test
Authors: Zhou Yuanfeng , Ding HaiLi , Hu TingTing , Yan Shaokui , Tian Rui 
Published: May 2021

Abstract
Design and develop the intelligent management and control system for the full performance test of the smart electric energy meter to realize the intelligent detection of the full performance test of the electric energy meter. The test intelligent control system is compatible with the automatic connection and disconnection technology of a variety of metering equipment, and realizes the automatic connection and disconnection and automatic testing of the equipment. Complete the automatic capture of abnormal phenomena and automatic judgment of unqualified items, complete the design and validity verification of the electromagnetic compatibility test automatic detection implementation plan. During manual test operation, various circuits and test points can be switched manually to realize automatic testing of various tests. The test intelligent management and control system realizes the system flexible scheduling control strategy, and completes the intelligent scheduling of the status of the equipment to be inspected and the idle status of each test unit.
Design and Research of Constant Magnetic Field Verification Device for Electric Energy Meter
Authors: Cui Shengsheng , Gao Yang , Yang Yan , Ma Bin , Sun Jianfeng , Li Xi , Hua Shubei 
Published: May 2021

Abstract
Design the electric energy meter constant magnetic field verification device system, carry out the constant magnetic field verification, and realize the electric energy meter constant magnetic field automatic verification. To ensure the accuracy and traceability of the magnetic field, a magnetic field sensor is installed at the bottom of the tray, and the test magnetic field is read in real time through the magnetic field sensor. The device is fixedly connected with an infrared sensor to detect the rotation angle of the magnetic steel. The operation of the three-axis motor of the magnetic field detection device changes the position of the magnetic steel around the bottom and top of the electric energy meter to complete the verification of the entire electric meter. The electric energy meter constant magnetic field verification device has high accuracy, strong safety, and can complete the automatic detection function.
Research on Modal Characteristics of Vehicle Chassis Transmission Shafting Based on ADAMS
Authors: Shen Liangyuan , Bo Cui 
Published: May 2021

Abstract
Vehicle chassis usually adopts variable speed axial transmission system composed of universal joint transmission shaft and gear pair. The vibration, impact and energy loss are related to the efficiency of power transmission and the safety performance of equipment. Since variable shaft transmission system is the key component of vehicle chassis, vibration and noise reduction is the inevitable way to improve vehicle quality, energy conservation and environmental protection. However, researchers have done a lot of work on the dynamic characteristics of gears, rarely considering the influence of cardan shaft on the modal characteristics of gear pair system. Taking the rear wheel drive system of a vehicle chassis as the research object, the virtual prototype simulation model of the transmission shaft main reducer assembly is established by using the dynamics software ADAMS, and the influence of the stiffness of the shaft and the intermediate support on the noise and vibration characteristics of the rear axle main reducer is analyzed. At the same time, the accuracy of the simulation results is verified by experiments, which provides a reference for the parameter design of the drive shaft and the rear axle final drive.
Energy Commodity Logistics Planning method based on Machine Learning method
Authors: Jiang Hongchao 
Published: May 2021

Abstract
In order to cope with the increasingly fierce competition in the market of refined oil products, improve the level of logistics operation and achieve logistics efficiency, a transportation scheduling method of refined oil logistics based on dynamic programming model was proposed to improve transportation efficiency, reduce logistics costs and increase enterprise benefits. Firstly, the basic ideas of logistics and transportation scheduling of refined oil were analyzed, and the comprehensive system of logistics and transportation scheduling of refined oil was constructed. The statistical analysis and sampling of logistics and transportation scheduling of refined oil were carried out by adopting the adaptive dynamic programming method, from which the characteristic values of association rules which could reflect the level of logistics and transportation scheduling of refined oil were extracted. Big data information fusion method is used to optimize the dynamic planning and transportation mode of refined oil logistics and transportation scheduling, and the spatial dynamic programming model of refined oil logistics and transportation scheduling is established. Combined with pattern recognition and path optimization method, the optimal design of refined oil logistics and transportation scheduling model is realized. The simulation results show that this method has good adaptability to transport scheduling of refined oil logistics, and the transportation efficiency of refined oil logistics is improved, the route is optimized, the level of enterprise guarantee is improved, and the logistics cost is reduced, which provides a strong guarantee for expanding the market and increasing the efficiency.
Wind turbine tower failure analysis and wind-induced vibration control
Authors: Gao Hui , Li Xing 
Published: May 2021

Abstract
Wind energy has great potential for development in clean energy. The economic loss caused by the destruction of the wind turbine tower in a wind turbine failure is very huge. Therefore, this paper analyzes the gray correlation between the tower damage type and the cause of the damage. The results show that storms, pitch system failure, and wind speed exceeding the design wind speed have a good correlation with the tower damage type. In a storm environment, the dynamic response of the tower top of the wind turbine tower is relatively large, even leading to the overall collapse of the tower. The tuned mass damper (TMD) has an obvious damping effect on the wind vibration response of the tower.
Filtering of microseismic data based on information about signal phases
Authors: Azarov AV , Serdyukov AS 
Published: May 2021

Abstract
Seismic data filtering algorithm has been developed. The proposed algorithm allows amplifying signals from the sources located inside a selected area of space. The paper presents a theory describing the principle of this algorithm. Testing on synthetic data showed that the proposed filtering method is capable to suppress signals from the sources located outside the selected area of space. On semi-synthetic data it was shown that the proposed filtering method allowed to suppress real noise and significantly increases the signal-to-noise ratio for the events located inside a selected area of space.
Improvement of downhole probe control system for the measurement of hydraulic fracturing at considerable distances from the working contour
Authors: Leontiev AV , Rubtsova EV , Lekontsev YuM 
Published: May 2021

Abstract
Actual issues of improving the design of the downhole probe as part of equipment for the practical implementation of the method of measuring hydraulic fracturing in mine conditions were discussed. The variants of the probe operation control schemes are presented using a single press pipeline, designed to simplify the installation of the equipment in the borehole, especially at considerable distances from the working contour. The new design map for controlling the process of probe packing is considered. Its application eliminates unstable deformation of sealing elements, in case of the well diameter increase above the nominal value, ensuring reliable sealing of the test area.
Consideration of block structure in mathematical models of rock mass
Authors: Chanyshev AI , Belousova OE 
Published: May 2021

Abstract
For the media with periodic changes in Young’s modulus and yield strength, the problems of stress, strain and displacement distribution around single excavations of spherical and cylindrical shape are solved. Block structure of the medium is determined by the difference between the elastic modules and the yield strength in the blocks and interblock space. In each case analytical solutions are obtained. The influence of blocks quantity, difference in block properties and interlayers on the nature of changes in stresses, strains and displacements was studied. It is noted that block structure is one of the factors for forming zonal disintegration around excavations.
Deep-seated tectonics and its relationship to dynamic processes caused by ore mining (according to xenolith study)
Authors: Shevchenko YuS 
Published: May 2021

Abstract
The paper examines a possible relationship of the occurrence of catastrophic situations (earthquakes, rock bursts, etc.) in unordinary conditions and manifestations of tectonic processes in the bowels of the Earth at the “lower crust-upper mantle” level. It is shown that such tectonics is observed in basite-ultrabasite xenoliths bearing clear features of deep-seated deformation (olivine twinning, curved crystals, drag grains of spinel, preferred orientation of optical indicatrices of minerals, etc.). The mentioned relationship is studied from the viewpoint of relaxation reaction of rock masses, rocks and their element components on mass displacements in the Earth’s depths.
In-well vibration effect on cement stone impermeability
Authors: Kordubailo AO , Simonov BF , Nechaev NS 
Published: May 2021

Abstract
Impermeability tests are carried out on cement stone under the influence of operating downhole vibration exciter. It is found that cement stone preserves its porofractured structure under the static force impact. Under the local vibration effects within 10 h, a the initial structure of microfractures becomes dynamic but the relative reduction in the proof-test pressure increases 2–3 times. The ingress of water is absent in cement stone, which means the absence of risk of behind-the-casing flow of fluid and water under the action of in-well vibrations.
New options to study irreversible deformations in the Tien Shan lithosphere
Authors: Matiukov VE , Bataleva EA , Nepeina KS 
Published: May 2021

Abstract
The paper describes application of an approach according to which the endogenous-nature electromagnetic field (EM) is included in the impedance relationships in an additive way, which allows distinguishing the EM field recoded on ground surface by the positions of sources. The case-studies of the endogenous EM field identification in the magnetotelluric sounding records obtained in the Tien Shan region are presented. The characteristics of the identified endogenous EM field are compared with the lunar-solar tides parameters and anisotropic properties of electrical resistivity. The found interconnections point at new options to study irreversible lithospheric deformations in the Tien Shan using magnetotelluric sounding data.
Experimental simulation of tensile fractures from a circular cavity
Authors: Suknev SV 
Published: May 2021

Abstract
The authors experimentally study initiation of tensile fractures from a circular cavity in a geomedium subjected to nonuniform compression. It is found that diameter of the cavity has a significant influence on the local fracture of the geomaterial. A new criterion is proposed for the quasi-brittle fracture of a material in the tensile stress concentration zone. The new criterion holds an integrated parameter which characterizes the size of the pre-fracture zone, the structure of a material and its plastic properties, the cavity geometry and the conditions of loading. The calculation and experiment result agree well.
Thermomechancal effects in different geomaterials in limiting behavior of cyclic loading
Authors: Blokhin DI , Sheinin VI 
Published: May 2021

Abstract
The authors discuss feasibility of acquisition of information on mechanical processes in geomaterials in post-limiting elastic deformation by variations in infrared radiation rate. Experimental recording of heat emission of rock salt and concrete samples in the limiting behavior of cyclical loading under uniaxial compression is described. Records of mechanical parameters appear qualitatively identical to heat emission variations which characterize the change in the stress–strain behave of the test geomaterials. The differences in the thermomechanical effects in concrete and rock salt in the described deformation mode are found.
Impact of blasting on pit wall rock mass
Authors: Zharikov SN , Kutuev VA 
Published: May 2021

Abstract
The paper presents the research findings obtained by the Institute of Mining in drilling and blasting in Dzhetygara open pit mass. The research was aimed at enhanced stability of stationary benches and at cost minimization of drilling and blasting. The research met two objectives. First, in terms of Dzhetygara deposit, perimeter blasting designs were developed, which ensured reduced impact of blasting on adjacent rock mass. Second, the blast-induced PPV measurement procedure was refined and introduced, and the blasting technology was improved for blasting operations at ultimate pit limit. The special technology for ultimate pit perimeter blasting includes: analysis of blast effects on pit wall rock mass; finding of mechanisms of wave processes in rock mass; interaction of perimeter blasts depending on strength characteristics of rock mass; field trial of cutback methods; determination of sequence of blasts when approaching a guarded sites; determination of efficiency criteria of drilling and blasting.
Validation of local coal supply effectiveness in the hard-to-reach Arctic zones in Yakutia
Authors: Batugina NS , Gavrilov VL , Tkach SM 
Published: May 2021

Abstract
The article discusses shipment of coal to the Arctic regions of Yakutia. High transportation costs increase almost three times the price of one ton of the solid fuel. Coal fields in the Arctic have social rather than commercial value. The key target of local coal mining is enhancement of energy preparedness of population rather than money making. The review of modern methodological approaches to assessing the efficiency of using local coal resources in hard-to-reach areas reveals a wide range of such approaches, their ambiguity and neglect of the Arctic activities peculiarities. The paper presents a new approach for evaluation of small coal opencasts operating in remote Polar regions in Yakutia. The approach is based on the economic and mathematical model of substitution of local coal for imported coal. The technical and economic indicators of a small coal mine is calculated in terms of Krasnorechensky deposit of thermal coalm, and the effect of replacing imported coal by local coal in the Abyi district is evaluated. The results of the study show feasibility of in-house coal supply in the isolated and hard-to-reach areas of the Arctic by means of creation of small coal opencasts, which enhances the energy security and reduces the socio-economic tension.
Determination of rational process variables for multi-step centrifugal mills
Authors: Vinokurov VR 
Published: May 2021

Abstract
This paper presents the results of experimental studies into milling under multiple impacts in multi-step centrifugal mill designed at the Chersky Institute of Mining. In order to enhance milling capacity, it is proposed to add breakers of the mill with more breaking elements. However, addition of breaking elements sometimes fails to intensify milling and can adversely affect on the milling efficiency to to higher velocity air flows generated in the working space between the top and bottom breakers. The tests have determined the rational number of additional breaking elements, conditioned by the critical air flow velocity of 10 m/s in the breaker chamber of the lab-scale multi-step centrifugal mill. Given these conditions are fulfilled, the fineness number of the multi-step centrifugal mill with additional breaking elements grows considerable as against the base case of the mill without additional elements.
Modular system of simulation modeling of conventional and robotic mining technologies
Authors: Zinoviev VV , Starodubov AN , Nikolaev PI 
Published: May 2021

Abstract
The paper describes the function chart of a simulation modeling system for the conventional or robotic mining technologies with drilling-and-blasting and cutting methods. The function chart is implemented using the evolutionary algorithm and simulation approach. The authors present the main program modules with generate simulation models and optimize the technology and management scenarios for the specific geological and geotechnical conditions. The structure of the data base on mining machines, their capacities, robotic automation alternatives and compatibility is presented.