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检索条件"任意字段=8th Biennial Conference on Engineering Systems Design and Analysis"

共 8343 条记录，以下是841-850 订阅

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Morphological analysis of the Machined Surface During Nanopowder Mixed Micro-electric Discharge Drilling (PM-μEDD) of Mg Alloy AZ91D 8th

Morphological Analysis of the Machined Surface During Nanopo...

引用

8th International and 29th All India Manufacturing Technology, design and Research conference, AIMTDR 2021

作者： Yadav, Santosh Kumar Singh, Abhishek Debnath, Kishore Mechanical Engineering Department NIT Patna Patna800005 India Mechanical Engineering Department NIT Meghalaya Shillong793003 India

ISBN: (纸本)9789811971495

In this paper, the surface morphology of micro-hole produced in magnesium alloy AZ91D was investigated. the micro-hole was fabricated through a nanopowder mixed micro-electric discharge drilling (PM-μEDD) process. the tool electrode made of tungsten carbide (WC) having 0.97 mm in diameter was used to perform the experiments. the experiments were conducted considering four input variables namely (a) tool rotation, (b) feed rate, (c) voltage, and (d) powder concentration. the other parameters such as capacitance (100 μF), depth of cut (0.25 mm), and pulse on time (10 μs) were kept constant during the PM-μEDD process. FESEM images of the fabricated micro-holes were taken at a different magnification to investigate the characteristics of the machined surface. EDS analysis of the machined surface was also performed to study the elemental composition. © 2023, the Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Electric discharges

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Loss Calculation and Fluid-thermal Field Coupled analysis of Bridge Arm Reactor 8

Loss Calculation and Fluid-Thermal Field Coupled Analysis of...

引用

8th International conference on Energy System, Electricity, and Power, ESEP 2023

作者： Wang, Liuyang Yang, Fan Tang, Pengfei Zhao, Qi Wang, Pengbo Li, Xinheng State Key Laboratory of Power Transmission Equipment Technology School of Electrical Engineering Chongqing University 400044 China China Electric Power Research Institute Beijing100192 China Tianjin Key Laboratory of Internet of Things in Electricity State Grid Tianjin Electric Power Research Institute Tianjin300384 China

ISBN: (数字)9781510679801

ISBN: (纸本)9781510679795

Bridge arm reactors are subjected to composite current of AC and DC in operation, having both AC current distribution characteristics based on inductance distribution and DC current distribution characteristics based on resistance distribution. Aiming to study the differences in temperature rise, current and loss calculations are performed according to electromagnetism and heat transfer theories. the static temperature distribution law of the reactor and its influencing factors are analyzed. the results show that the loss of metal accessories accounts for 1.02% and the collector ring is prone to local overheating. the maximum temperature rise of the encapsulation shows a nonlinear decrease with the increase of the flow rate and the decrease of the ambient temperature. the winding hottest spot temperature in AC condition is higher than that in DC condition. the temperature distribution is more uniform in DC condition. the research results can provide reference for the design of temperature rise of reactors under AC-DC compound high current in actual engineering. © 2024 SPIE.

关键词： Temperature distribution

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Multivariate analysis of Passive Energy-Saving design of High-Rise Residential Buildings Based on RBF and Orthogonal Test 8th

Multivariate Analysis of Passive Energy-Saving Design of Hig...

引用

8th International conference on Energy and Environmental Science, ICEES 2024

作者： Wang, Zhengwei Lv, Xuejun Zhang, Hui Han, Xiaolin Zhu, Fucheng School of Civil Architecture and Environment Hubei University of Technology Wuhan430068 China Key Laboratory of Health Intelligent Perception and Ecological Restoration of River and Lake Ministry of Education Hubei University of Technology Wuhan430068 China Central-South Architectural Design Institute Co. Ltd Wuhan430061 China Underground Space and Human Defense Design Institute of China Construction Third Bureau Group Co. LTD Wuhan43000 China

ISBN: (纸本)9783031639005

the proportion of high-rise residential buildings in China is gradually increasing, and with the implementation of the national new green building evaluation standards and the continuous strengthening of energy conservation standards, the potential of passive energy saving needs to be further explored. Radial Basis Function (RBF) neural network and orthogonal experiment design range difference method were adopted for the nine passive influencing factors in the high-rise corridors in hot summer and cold winter regions. this research discusses the influence of different passive factors on the energy consumption of heating and cooling in high-rise residential buildings and the prioritization issues under the requirements of 50, 65 and 75% energy saving, to provide ideas and references for the passive energy-saving design of high-rise residential buildings. © the Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Energy saving

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analysis of Space Contamination Effect on the Detecting Data from "XY-1" Satellite 8th

Analysis of Space Contamination Effect on the Detecting Data...

引用

8th China High Resolution Earth Observation conference, CHREOC 2022

作者： Xiao-xue, Yuan Dong-sheng, Yang Wei-guo, Zang Qian, Y.U. Beijing Institute of Spacecraft Environment Engineering Beijing100094 China

ISBN: (纸本)9789811982019

the detecting data from the space contamination effect detector onboard "XY-1" satellite is analyzed in this article. Summaries are made via analyzing the detecting data of the space contamination effect detector in more than four years, via analyzing the relationship between the contamination mass and the capability of GaInP2 solar cells. It can be drawn that the measures for the screening of space materials are effective and satisfy the contamination control demands for the whole process of spacecraft. the current results can be used for the contamination control design of solar cells, and also, in checking out and correcting the contamination control techniques on the ground for spacecrafts. © 2023, the Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Nonmetallic materials

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analysis of the Impact of Spacecraft Pointing Error on Terahertz Communication 8

Analysis of the Impact of Spacecraft Pointing Error on Terah...

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8th IEEE Information Technology and Mechatronics engineering conference, ITOEC 2025

作者： Cao, Dongping Shao, Ming Zhao, Tengshan Shanghai Aerospace Electronic Technology Institute China

ISBN: (纸本)9798331517915

In space terahertz communication missions, aircraft are subject to various factors such as platform disturbances and background noise, which can cause angular micro vibrations and result in non-zero antenna pointing errors, thereby affecting the overall performance of the communication system. this article combines the pointing error of typical spacecraft to establish a channel model under its influence, derives the expression of BER and channel capacity under the influence of pointing error, and quantitatively and intuitively analyzes the impact of spacecraft pointing error on terahertz frequency band communication performance from multiple perspectives such as signal constellation diagram, BER, channel capacity. the results indicate that the 16QAM modulation signal is affected by pointing errors with a RMS greater than 10 μ rad, resulting in a BER deviation greater than 4dB and a channel capacity deviation greater than 10%;At high SNR, the BER is greater than 20%, and the channel capacity deviation is close to 60%. the above results have important implications for the design of space terahertz communication systems in practice. © 2025 IEEE.

关键词： Aircraft communication

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Research and simulation analysis of crack failure mechanism of conductor spacer bar in ±800 kV converter station 8

Research and simulation analysis of crack failure mechanism ...

引用

2023 8th International Seminar on Computer Technology, Mechanical and Electrical engineering, ISCME 2023

作者： Zhou, Yanke Teng, Yulin Zhou, Yanwen Zhang, Zhaoyu Sun, Hebin Zhao, Chaoyou Gansu Electric Power Research Institute Lanzhou730070 China State Grid Gansu Electric Power Company Gannan Power Supply Company Hezuo747000 China Gansu Electric Power Research Institute Technology Center Lanzhou730070 China

the cracking of the conductor spacer bar in a ±800 kV converter station was detected and simulated to study the cause of failure. By means of penetration detection, fracture macroscopic inspection and metallographic inspection, it can be found that there are some casting defects such as segregation, pinhole and intergranular micro-crack in the chuck microstructure of the spacer bar, and the fatigue fracture occurs under the action of alternating stress. through the structural simulation analysis, it can be concluded that the spacer rod body and the joint of the chuck have a structural mutation, which causes stress concentration and leads to the fracture of the spacer rod. Finally, suggestions are put forward to improve the design, manufacture and installation process of spacer rods to prevent similar failures from happening again and ensure the safe operation of the power grid. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Textures

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design of mine ventilation system based on BP neural network optimized by GA

Design of mine ventilation system based on BP neural network...

引用

International conference on Information systems engineering (ICISE)

作者： Jianghai Liu Wuhan Donghu University

the safety evaluation of mine ventilation system is a process with strong comprehensiveness and a great deal of information uncertainty. It is more reliable to use GA-optimized BP neural network algorithm to construct the mathematical model of mine ventilation system safety evaluation. the simulation experiment and data analysis show that the BP neural network algorithm based on GA optimization can effectively evaluate the mine ventilation system and obtain the optimal ventilation rate, so as to maintain survival, safety, economic energy-saving purposes.

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Configuring and Validating Multi-aspect Risk Knowledge for Industry 4.0 Information systems 36th

Configuring and Validating Multi-aspect Risk Knowledge for I...

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36th International conference on Advanced Information systems engineering (CAiSE)

作者： Biffl, Stefan Kropatschek, Sebastian Meixner, Kristof Hoffmann, David Luder, Arndt Tech Univ Wien Inst Informat Syst Engn Vienna Austria Tech Univ Wien CDL SQI Vienna Austria Austrian Ctr Digital Prod Vienna Austria Otto von Guericke Univ Inst Factory Automat Magdeburg Germany

ISBN: (纸本)9783031610561;9783031610578

Industry 4.0 information systems support production stakeholders in configuring and debugging increasingly flexible Cyber-Physical Production systems (CPPSs), such as automated car plants. A Failure Mode and Effects analysis (FMEA) aims at mitigating production risks by analyzing the main causes of risks in production, such as defective products. However, a FMEA provides limited guidance on (i) validating risk knowledge and (ii) reducing risk knowledge complexity regarding CPPS engineering artifacts. this paper introduces the Multi-aspect FMEA Configuration Management (MFCM) approach (i) to design and validate a multi-aspect CPPS risk knowledge graph and (ii) to focus on required graph parts, adapting conditioned backward program slicing. this small graph serves as a foundation for answering stakeholder questions on production risks and causes with data from validated sources. We evaluated MFCM in a feasibility study on a real-world welding line. Results indicate that MFCM is effective for production process slicing of multi-aspect risk knowledge required to analyze a production condition.

关键词： Industry 4.0 cyber-physical production system engineering configuration management DIN 60812 multi-aspect IS engineering

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Exploration of Alert Response Strategy Modeling Method Based on MBSE 26th

Exploration of Alert Response Strategy Modeling Method Based...

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26th International conference on Human-Computer Interaction (HCII)

作者： Du, Lin Su, Meihui Wang, Xiaoli Guo, Wei Shanghai Aircraft Design & Res Inst 5188 JinKe Rd Shanghai 201210 Peoples R China COMAC Beijing Aircraft Technol Res Inst Yingcai North 1st St Beijing 102211 Peoples R China

ISBN: (纸本)9783031619311;9783031619328

A key component of flight safety in commercial aviation is the cockpit crew alert system. However, due to the increasing integration and complexity of modern civil aircraft systems, a single failure can quickly propagate to other systems, while each affected system also generates different types of alert information. Faced with multiple alerts generated by this cascading effect of failures, it's difficult for pilots to accurately and quickly identify the source of the failure and select effective means of addressing it, which can lead to delays in addressing failures and affect flight safety. therefore, it is becoming more and more urgent to accurately identify the direct effects of the alerts. Traditional methods are often limited to reviewing specific areas or documents, making it difficult to view the system as a whole. Model-Based systems engineering (MBSE) provides a comprehensive framework for modeling, analyzing, and managing systems throughout their lifecycle. this research examines the modeling of alerts in the context of Model-Based systems engineering (MBSE) using suitable modeling languages. the focus on the individual components of the alert system, but also the in-depth consideration of the relationships between these components within the overall system and their dynamic behavior in different system states, is the unique strength of this method. Important modeling details, such as alert triggering conditions, the association between system states and alerts, system architecture, and failure mode analysis, are emphasized by embedding alerts in the overall system engineering model. this research effectively demonstrates the practicality and effectiveness of the modeling approach in real-world applications through a detailed analysis of practical model cases. the study provides robust theoretical and empirical support for enhancing system security. By integrating the alert system into the overall engineering model, this approach promotes a comprehensive

关键词： MBSE Framework Failure Modeling Alert System Modeling

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analysis of the specific fuel efficiency for preliminary design stage of transport category aircraft variant 8

Analysis of the specific fuel efficiency for preliminary des...

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8th International conference on Mechanical engineering and Automation Science, ICMEAS 2022

作者： Tiniakov, Dmytro Ukraine, Kharkiv Kapitanova, Ludmyla Makarova, Liia Nanjing University of Aeronautics and Astronautics College of Civil Aviation Nanjing China National Aerospace University of Ukraine Aircraft Engineering Faculty Ukraine Nanjing University of Aeronautics and Astronautics College of Aerospace Engineering Nanjing China

ISBN: (纸本)9781665463058

the fuel efficiency index has an important place for the transport category aircraft competitiveness evaluation. the approaches for the fuel efficiency evaluation of the existing aircraft is well known and now applied for estimation calculations. But, for the preliminary design stage of the new variant creation the new approach is needed that can let control parameters selection for the required fuel efficiency level providing. there are some approaches that let it evaluate a part of weight and aerodynamic parameters of airframe and engines' specific fuel consumption on the integral fuel efficiency index of aircraft variant for cruise flight and mean hourly fuel consumption for certification stage, when all performance of an airframe and a power plant can be fixed and their rational adjustment is not possible. New approach is proposed for the self-Adjustment of a wings' parameters and powerplant performance for the preliminary design stage. It is based on the specific fuel efficiency-specific flight productivity. © 2022 IEEE.

关键词： Productivity

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