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Optimization scheme for rapid analysis of copper ore grade using EDXRF

Optimization scheme for rapid analysis of copper ore grade u...

引用

2023 International Conference on Computer Application and Information Security, ICCAIS 2023

作者： Li, Wen Lai, Wanchang Chen, Dongdong Ma, Yutian Yang, Bingsong Zhang, Diancheng College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu610059 China National Key Laboratory of Ni&Co Associated Minerals Resources Development and Comprehensive Utilization China Gansu Jinchuan Intelligent Measurement and Control Technology Co. Ltd. China

ISBN: (纸本)9781510675032

In order to optimize the method and technology for the rapid determination of copper ore grade using Energy Dispersive X-ray Fluorescence (EDXRF), improve the accuracy of EDXRF analysis, guide the development and utilization of copper ore resources, and enhance production efficiency, the optimal operating conditions for the EDXRF analyzer were determined using Monte Carlo (MC) simulation and physical experiments. The recommended settings were a tube voltage of 40 kV and a tube current of 10 μA. Under these optimal conditions, the copper (Cu) content in various types of copper ore samples was analyzed. The copper ore was categorized into geological samples (including raw ore samples and tailings samples), copper concentrates, and matte. The correction of matrix effects was carried out using a binary regression method. Experimental results showed that the average absolute error of analyzing geological samples by EDXRF was 0.035%, with an average relative error of 4.08%. The average absolute error for analyzing copper concentrates was 0.238%, with an average relative error of 1.01%. For matte analysis, the average absolute error was 0.421%, with an average relative error of 1.01%. The accuracy and precision of the method meet the production requirements of enterprises, and it holds promising prospects for widespread application. © 2024 SPIE.

关键词： Ores

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Dynamics Characteristics Analysis of Rack Railway Guiding Equipment of Mountain Rack Railway Train with Considering Wheel-Rail Contact

Dynamics Characteristics Analysis of Rack Railway Guiding Eq...

引用

International Conference on Mechanical Design, ICMD 2023

作者： Wang, Haowen Xiang, Quanming Liu, Weiping Gao, Chang Liu, Jialin Wang, Shisong Deng, Xingqiao College of Mechanical and Electrical Engineering Chengdu University of Technology Sichuan Chengdu610059 China Sichuan Dujin Mountain Rail Transit Co. Ltd. Sichuan Chengdu611830 China Sichuan Shudao New System Rail Group Co. Ltd. Sichuan Chengdu610072 China School of Nuclear Technology and Automation Engineering Chengdu University of Technology Sichuan Chengdu610059 China

ISBN: (纸本)9789819709212

A multi-body dynamic simulation model is established to study the rack railway guiding equipment (RRGE) in the mountain rack railway train system. This model incorporates the effects of wheel rail-rack rail contact and linear spring damper, which can accurately depict the dynamic response of RRGE. Considering the factors such as train passing speed, vertical distance, and initial gear posture, the model is first applied to analyze the dynamic characteristics of the gear. Then according to the gear entry condition and gear rotational speed, the vibration response of RRGE when the gear passing through rollers is analyzed. Finally, the dynamic characteristics of gear and RRGE under two extreme conditions are comparatively analyzed, and a set of parameters are proposed to ensure the smooth transition of the train. The simulation results show that, to ensure the safety of the mountain rack railway train, it is recommended to set the vertical distance at 173 mm and the initial gear posture at tooth contact. Furthermore, when selecting the train passing speed, factors such as gear entry condition, train operation efficiency, and shock vibration level should be taken into consideration. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Railroads

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Research on the Remaining Useful Life Prediction Model of Complex Equipment 4

Research on the Remaining Useful Life Prediction Model of Co...

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4th International Symposium on Artificial Intelligence and Intelligent Manufacturing, AIIM 2024

作者： Tang, Lei Tang, Yifei Zhang, Junhao Liu, Mengjuan Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu China School of Information and Software Engineering University of Electronic Science and Technology of China Chengdu China Glasgow College University of Electronic Science and Technology of China Chengdu China

ISBN: (纸本)9798331541729

With the rapid advancement of artificial intelligence technology, the development of intelligent manufacturing has become an inevitable trend. Utilizing AI technology to ensure the safe operation of factories is a crucial aspect of smart factories. In particular, research focused on fault diagnosis and remaining useful life (RUL) prediction models based on machine learning has garnered significant attention from both academia and industry. This paper explores RUL prediction models for complex equipment, introduces four representative models, and analyzes their performance using two benchmark datasets, C-MAPSS and N-CMAPSS. Finally, the paper discusses the future research and application trends of artificial intelligence technology in complex equipment operation and maintenance. © 2024 IEEE.

关键词： Smart manufacturing

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Research on Application of Embedded AI in Fall Detection

Research on Application of Embedded AI in Fall Detection

引用

Artificial Intelligence, Networking and Information technology (AINIT), International Seminar on

作者： Yan Liu Xing Zhu College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China College of Computers and Cyber Security Chengdu University of Technology Chengdu China

ISBN: (数字)9798350385557

ISBN: (纸本)9798350385564

The traditional elderly fall detection system has some shortcomings, such as high false alarm rate and large delay, which limits its reliability and practicability in practical application. In order to timely and accurately notify the guardian of the old man's fall information, a low-power fall detection system based on em-bedded artificial intelligence is proposed. The system is based on low-power ARM processor, coupled with low-power and small-volume MEMS acceleration sensor. By designing the overall structure of the system, the peripheral circuits of ARM processor and MEMS acceleration sensor, and writing embedded programs and embedded artificial intelligence algorithms, the core functions such as data acquisition, fall identification and fall state transmission are realized. In the experiment, an algorithm model of FDNet (Fall Detection Network) is proposed, and a lot of tests and evaluations are carried out. The experimental results show that the system can achieve 98% accuracy on embedded devices. In addition, the system also shows excellent environmental adaptability, low power consumption and small size, which makes it suitable for fall detection and early warning in various occasions. The successful application of the system is expected to provide effective protection for the health and safety of the elderly.

关键词： Micromechanical devices Seminars Power demand Accuracy Writing Feature extraction Security

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Common Mode Voltage Suppression of Three-to-Six-Phase Indirect Matrix Converter Based on 6-Virtual Vector Method 10

Common Mode Voltage Suppression of Three-to-Six-Phase Indire...

引用

10th IEEE International Power Electronics and Motion Control Conference, IPEMC 2024 ECCE Asia

作者： Ma, Kai Lu, Ke Guo, Jiling Xiao, Tianlong Southwest Jiaotong University College of Electrical Engineering Chengdu611756 China National Rail Transit Electrification and Automation Engineering Technology Research Center Chengdu611756 China

ISBN: (纸本)9798350351330

This article proposes a new modulation method that can suppress the maximum common mode voltage of a six phase output indirect matrix converter by 50%, while also taking into account the suppression of multi-phase output harmonic ***, the size of common mode voltage was studied considering only the switching state of the inverter stage. Based on the principles of minimizing common mode voltage and synthesizing harmonic voltage to zero, a virtual vector of inverter stage 6 was constructed. Secondly, the magnitude of common mode voltage when the rectification stage vector and the inverter stage 6 virtual vector act together was studied. Based on this, the rectification stage vector and inverter stage virtual vector were selected based on the minimum common mode voltage of different sectors. This can suppress the common mode voltage generated by the effective vector of the six phase output indirect matrix converter to 0.29Vin, and the common mode voltage generated by the zero vector to 0.5Vin © 2024 IEEE.

关键词： Matrix converters

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Experimental Study on the Effect of Temperature on tan δ Measurement of 110 kV Voltage Transformer

Experimental Study on the Effect of Temperature on tan δ Me...

引用

IEEE International Conference on Power and Energy Systems (ICPES)

作者： Hong Gu Tianxiang Chen Lehui Cai Zhuofeng Jiang The college of Nuclear Technology and Automation Engineering Chengdu University of Technology Cheng Du China

ISBN: (数字)9798350391329

ISBN: (纸本)9798350391336

Voltage transformer as a substation important equipment, assuming the role of measurement, control and protection. Equipment in the operation process is susceptible to temperature and other factors that cause insulation defects, need to carry out regular insulation preventive testing. In this paper, we take 110 kV series-type voltage transformer as the research object, and use four different wiring methods to explore the changes of $\tan \delta$ value and capacitance under different ambient temperatures, insulating oil temperatures, and insulating oil moisture conditions, to verify the applicability and reasonableness of the relevant values in the Regulations, and to provide an effective basis for the series-type voltage transformer to determine the insulation faults of the equipment through the $\tan \delta$ value. The results show that the $\tan \delta$ value increases with the rise of temperature under different wiring methods, while the capacitance is basically unchanged; the end shielding method is the most sensitive to the moisture of insulating oil under different temperature conditions; when the insulation is normal, the conventional inverse wiring is more sensitive to the temperature change; when the insulation is faulty, the conventional positive wiring is more sensitive; to determine whether there are insulation defects of voltage transformers should be measured by the $\tan \delta$ value in lower temperature as the main criterion, and the Kegulations” will be used to determine whether there are insulation defects of the series type voltage transformer through the $\tan \delta$ value. Judgment of whether the voltage transformer insulation defects should be measured at lower temperatures $\tan \delta$ as the main criterion, Kegulations” in the relevant $\tan \delta$ value criterion should be adjusted in a timely manner.

关键词： Temperature measurement Temperature sensors Wiring Insulation Temperature Voltage measurement Voltage transformers Oils Moisture Capacitance

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Experimental Study on the Effect of Humidity on the Tanδ of 110kV Oil-Immersed Current Transformer

Experimental Study on the Effect of Humidity on the Tanδ of...

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Power Electronics and Power System Conference (PEPSC)

作者： Long Chen Tianxiang Chen Xun Wang Xiaolei Xiang College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu

As an important parameter characterizing the insulation performance of high-voltage equipment, $\tan\delta$ is commonly used in the regular maintenance and fault inspection of high-voltage equipment. During the $\tan\delta$ measurement of high-voltage equipment, it is found that the ambient humidity will affect the measurement results. In order to avoid this effect leading to the misjudgment of the insulation condition of the equipment. In this paper, a current transformer model LB6-110, which has been operated for more than 10 years, is taken as the test object, and the method of controlling the humidity change is adopted. Through five different test wiring methods to measure tanδ, summarize and analyze the effect of humidity on $\tan\delta$ under different test wiring, and put forward the optimal wiring method to avoid the effect of humidity.

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Characterization of the Effect of Different Flame Clusters on Gap Leakage Current Under 10Kv Line

Characterization of the Effect of Different Flame Clusters o...

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IEEE International Conference on Power and Energy Systems (ICPES)

作者： Yi Zeng Tianxiang Chen Zhen Wang Haohan Yang The college of Nuclear Technology and Automation Engineering Chengdu University of Technology Cheng Du China

ISBN: (数字)9798350391329

ISBN: (纸本)9798350391336

In recent years, wildfires in the corridors of transmission and distribution lines have occurred frequently, posing a serious threat to the stable operation of the power grid. To study the influence of flame cluster number on the leakage current characteristics of gaps in 10 kV lines, experiments were conducted on the discharge characteristics of a 12 cm wire-board gap under different vegetation flame cluster conditions. The variations in leakage current amplitude under different capacitive current conditions were analyzed, clarifying two discharge forms under flaming conditions. The results indicate that the leakage current in single and multiple cluster vegetation flame conditions is inversely correlated with capacitive current and shows a negative correlation with the ash content of vegetation. Under capacitive currents of 1A and 5A, breakdown occurs in the gap under straw flame conditions, attributed to the highest ash and burning particle content in the straw. This demonstrates that temperature is not the primary factor affecting gap breakdown under straw flame conditions, with ash content being dominant. The findings provide technical references for using electrical signals from lines to warn of wildfires beneath and analyze the causes of incidents.

关键词： Wildfires Correlation Electric breakdown Shape Fires Vegetation Ash Capacitance Discharges (electric) Leakage currents

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Research on the Time of Fire Initiation Caused by Tree Line Faults Under 35kV Transmission Lines

Research on the Time of Fire Initiation Caused by Tree Line ...

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IEEE International Conference on Power and Energy Systems (ICPES)

作者： Haohan Yang Tianxiang Chen Yi Zeng Zheng Wang The college of Nuclear Technology and Automation Engineering Chengdu University of Technology Cheng Du China

ISBN: (数字)9798350391329

ISBN: (纸本)9798350391336

In recent years, forest fires caused by transmission line tree line faults occur frequently, transmission line tree line faults affect the safety and reliability of power grid operation, a serious threat to the safety of natural resources and people's property. In this paper, for the 35kV transmission line tree line faults caused by hill fire, built a 35kV line tree line fault experimental platform, in the capacitance current of 248 mA and 132 mA conditions, respectively, selected bamboo, pine and cedar three typical trees as a research sample, to carry out the three kinds of trees tree line fault fire time experiments. The burning phenomena, charring channels, and infrared images of different trees were recorded and analyzed, and the corresponding laws were drawn up to summarize the longest and shortest fire starting times of different capacitance currents and different trees. The research in this paper can provide technical reference for the development of measures to prevent fire caused by tree line faults in 35kV transmission lines.

关键词： Natural resources Power transmission lines Vegetation Capacitance Transmission line measurements Power grids Safety Reliability Impedance Bamboo

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Research on the Characteristics of Leakage Current Changes in Tree Line Faults of 10Kv Distribution Lines

Research on the Characteristics of Leakage Current Changes i...

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IEEE International Conference on Power and Energy Systems (ICPES)

作者： Zheng Wang Tianxiang Chen Haohan Yang Yi Zeng The college of Nuclear Technology and Automation Engineering Chengdu University of Technology Cheng Du China

ISBN: (数字)9798350391329

ISBN: (纸本)9798350391336

There are numerous cases of forest fires caused by tree line faults in distribution lines, and it is of great significance to study the characteristic signals when tree line faults occur to prevent mountain fire accidents. In this paper, through theoretical analyses and the construction of real experimental platform, we studied the change rule of leakage current when single-phase tree line fault occurs in different trees. Through the single-phase tree line fault experiment, the relationship between leakage current and tree species, capacitive current to ground and water content when different trees touch the line is studied. The results of the study show that: the occurrence of single-phase tree line fault leakage current for the first time to reach the maximum value of time and tree species, the first time to reach the maximum value of the water content of trees and ground capacitance related.

关键词： Moisture Vegetation Forestry Fault location Capacitance Leakage currents Accidents

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