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3rd International conference on New Materials, Machinery, and Vehicle engineering, NMMVE 2024

作者： Li, Jiazhu Zhang, Shiwang Qin, Shaohui Yuan, Jiawei Li, Zixuan Yuan, Zheng Zhao, Zilong Luo, Ruiyan Tan, Hongqiang Zhao, Yihe Lif, Jie Gao, Wendi Li, Zhikang Zhao, Libo State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies Xi'an710049 China Research Institute for Intelligent Sensing Technology and System Xi'an710049 China School of Instrument Science and Technology Xi'an Jiaotong University Xi'an710049 China School of Mechanical Engineering Xi'an Jiaotong University Xi'an710049 China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai265503 China College of Mechanical and Electrical Engineering Shaanxi University of Science and Technology Xi'an710021 China

ISBN: (纸本)9781510686267

Due to compact size, high consistency, and resistance to radio frequency interference, MEMS microphones are increasingly important in the consumer electronics market and have driven the development of intelligent applications. There is a growing demand for enhanced performance in MEMS microphones. Currently, research on the shell design of MEMS microphones is relatively shallow, often only considering the accommodation of the vibrating diaphragm and ASIC chip, as well as the minimization of volume, without focusing on the impact of the shell configuration on the microphone's acoustic performance. Therefore, this paper starts from the perspective of optimizing acoustic response and studies the impact of the packaging shell configuration and design parameters of MEMS microphones on the microphone's sensitivity and frequency response, including the sound collection hole diameter, chamber volume, and chip layout. The goal is to establish a quantitative relationship between these key parameters and the microphone's performance. Simulation software was used to simulate the acoustic characteristics of the microphone shell, and optimal design parameters were recommended based on the simulation results. In addition, the research also proposes methods to adjust the frequency response of the microphone within the target frequency range, providing a reference direction for the scientific design of the shell structure to reduce the transmission loss of acoustic energy and enhance response sensitivity. © 2024 SPIE.

关键词： Shells (structures)

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High-Rate Structural Health Monitoring: Part-ii Embedded System design 1

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41st IMAC, A conference and Exposition on Structural Dynamics, 2023

作者： Downey, Austin D. Bakos, Jason Department of Mechanical Engineering University of South Carolina ColumbiaSC United States Department of Civil and Enviormental Engineering University of South Carolina ColumbiaSC United States Department of Computer Science and Engineering University of South Carolina ColumbiaSC United States

ISBN: (数字)9783031349461

ISBN: (纸本)9783031349454

engineering systems designed to operate in extreme dynamic and complex environments face stringent timing deadlines when it comes to implementing actions decided upon by an autonomous decision-maker. Importantly, the short time scales of the considered applications require the deterministic transfer between the different domains of a control scheme—mainly the domains related to decision-maker, model updating, feature extraction, and signal filtration. Moreover, the development of these embedded systems are limited by the size, weight, power, cost, and cooling (SWaPC2) of their parent applications. Part ii of this three-part tutorial will provide attendees with an organized discussion of the challenges related to the deterministic transfer of knowledge across controller domains considering the required stringent latencies. This tutorial will cover the basics of high-rate machine learning (HRML) and real-time modeling techniques deployed to heterogeneous computing systems that are likely to include real-time operating systems (RTOS), field-programmable gate arrays (FPGA), and shared memory frameworks for data acquisition systems. Experimental results from the deployment of benchmark algorithms to realistic hardware will be discussed. © 2023, The Society for Experimental Mechanics, Inc.

关键词： Embedded systems

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Optimised Energy Efficiency of Various Cell Sizes in Laser-based optical Wireless Communications

Optimised Energy Efficiency of Various Cell Sizes in Laser-b...

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IEEE International Mediterranean conference on Communications and Networking (IEEE MeditCom)

作者： Ncube, Walter Zibusiso Qidan, Ahmad Adnan El-Gorashi, Taisir Elmirghani, Jaafar M. H. Kings Coll London Dept Engn London England

ISBN: (纸本)9798350309492;9798350309485

optical Wireless Communication (OWC) networks have emerged as a solution to compliment traditional Radio Frequency (RF) networks due to limitations inherent in the latter. While Light Emitting Diodes (LEDs) were initially popular in OWC systems, their bandwidth limitations have prompted a shift towards Vertical-Cavity Surface-Emitting Lasers (VCSELs) for enhanced, reliable indoor communication. In this study, we investigate the deployment of VCSELs as Access Points (APs) within indoor environments, addressing the critical need for comprehensive spatial coverage across the communication plane. The extensive deployment of VCSELs required to achieve such coverage, however, introduces significant challenges, including inter-cell interference due to the proximity of multiple APs in overlapping operational zones and increased energy consumption due to the high number of APs. We study the performance of various AP cell structures, investigating the integration of multiple adjacent APs into a unified multi-AP cell using Zero Forcing (ZF) techniques to effectively manage overlap regions. Moreover, a power allocation optimisation problem is formulated to enhance the Data Rate (DR) and Energy Efficiency (EE) within the coverage area of the cell. Through comparing different ZF-based multi-AP configurations with and without the application of micro lenses to VCSEL arrays our findings reveal that a rise in the number of APs within cells boosts DR and EE at the cost of increased computational complexity. This complexity underscores a critical trade-off that demands careful consideration in the architectural design of future OWC systems.

关键词： optical Wireless Communication Networks Energy Efficient Communication Networks Next Generation Communication Networks VCSELs Interference Management

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Research on the development and application of an interactive AI-based power supply system 2

Research on the development and application of an interactiv...

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2nd International conference on Big Data, Computational Intelligence, and Applications, BDCIA 2024

作者： Gao, Jinming Zhu, Pingfei Xiong, Genxin Wang, Yukun Liu, Lei Shu, Yanfei Beijing China-power Information Technology Co. Ltd. Changping District Beijing102206 China

ISBN: (纸本)9781510689053

With the rapid evolution of digital technologies, the application of artificial intelligence (AI) in power systems has become increasingly critical to addressing the growing complexity and dynamic demands of modern energy markets. Traditional power marketing models are no longer sufficient to meet the need for real-time interaction, intelligent service delivery, and seamless collaboration among stakeholders. This study aims to develop an AI-powered, interactive power supply system to transform marketing processes and enhance service capabilities. Leveraging a co-innovation strategy-"AI + power marketing"-the proposed system integrates multimodal interaction, real-time voice communication, and intelligent solution generation, enabling dynamic engagement between users and service providers. The research employs advanced AI algorithms to optimize interaction design, improve solution accuracy, and streamline digital marketing workflows. Results from simulations and real-world applications demonstrate significant improvements in user-centric service quality, operational efficiency, and the digitalization of power marketing. These findings highlight the effectiveness of AI-based approaches in fostering intelligent transformation within the energy sector, offering a scalable framework for future advancements in power system marketing and services. © 2025 SPIE.

关键词： Artificial intelligence Power supplies Intelligence systems Industry Human computer interaction Industrial applications Inspection design Power consumption systems modeling

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Study on the Planning of Electric Vehicle Fast Charging Facilities Considering Path Selection Behavior

Study on the Planning of Electric Vehicle Fast Charging Faci...

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2023 International conference on Smart Transportation and City engineering, STCE 2023

作者： Ma, Liqiang Bao, Qisheng School of Management Science and Engineering Shandong Technology and Business University Shandong Yantai264005 China

ISBN: (纸本)9781510673540

The inadequate layout of intercity fast charging facilities leads to difficulties in intercity travel for electric vehicle(EV) users. We incorporate EV users' path selection behavioral preference factors into planning intercity fast charging facilities and propose a bi-level programming model. Firstly, the lower layer constructs a stochastic user equilibrium model for dynamic traffic in Logit form based on general regret theory, and the upper layer constructs a multi-objective planning model that considers minimizing the total annual cost of EV charging station operators and minimizing the average queuing time of EV users;secondly, the NSGA-ii nested MSA algorithm is used for solving the bi-level programming model;finally, the feasibility of the model and algorithm is verified by the Nguyen-Dupuis transportation network example. The results show that our proposed model can meet the charging needs of different users, and can effectively reduce the queuing waiting time of EV users and alleviate their travel anxiety. © 2024 SPIE.

关键词： Electric vehicles

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A Simultaneous Wireless Power and Data Transfer System for an SAE J2954 compliant EV Charger 6

A Simultaneous Wireless Power and Data Transfer System for a...

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6th Global conference on Wireless and optical Technologies, GCWOT 2023

作者： Casaucao, Inmaculada Trivino, Alicia University of Malaga Department of Electrical Engineering Malaga Spain

ISBN: (纸本)9798350333718

Simultaneous Wireless Power and Data Transfer (SWPDT) systems are becoming more relevant in recent times. In the area of Electric Vehicles (EV), these systems could avoid numerous problems between the two sides of the circuit when using commercial wireless communiation systems. Communication losses, connection errors or cybersecurity problems can be less severe with the use of the power coils to exchange data between the EV and the infrastructure. In this paper, the adaptation of an SAE J2954 charger to a double-sided LCC SWPDT system is proposed. For this purpose, the design of each of the parts that make up the circuit, such as the modulator circuit, the demodulator circuit, and the compensation system (CS), will be carried out. After the design, experimental tests will be conducted to validate the proposed prototype. The results of the experimental tests confirm the validity of the designed system, achieving the objective of transmitting data through the power coils from the primary circuit and receiving it in the secondary circuit. © 2023 IEEE.

关键词： Data transfer

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A New Targeted Online Password Guessing Algorithm Based on Old Password 26

A New Targeted Online Password Guessing Algorithm Based on O...

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26th International conference on Computer Supported Cooperative Work in design, CSCWD 2023

作者： Zhang, Xizhe Zhang, Xiong Hu, Jiahao Zhu, Yuesheng Peking University School of Electronic and Computer Engineering Shenzhen China

ISBN: (纸本)9798350331684

Password authentication is a widely used identity authentication method for computer supported cooperative systems. However, the frequent occurrence of password leakage incidents has become a universal problem, and the leaked passwords seriously threaten the security of users' unleaked passwords. In order to gain a deeper understanding of the relationship between users' old passwords and new passwords and help users choose a securer new password when their old passwords are leaked, we propose a new targeted online guessing algorithm, Targuess-ii+, based on old password in this article. As a new probabilistic algorithm, Targuess-ii+ not only supports the application of strong transformation rules at any positions in a password, but also shows the transformation process from one password to another. Our analysis and experimental results have demonstrated that Targuess-ii+ obtains better performance in terms of crack rate and efficiency compared with other existing algorithms. © 2023 IEEE.

关键词： Authentication

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Research on Optimal design of Reaction Conditions Based on Mixed Statistical Model 2

Research on Optimal Design of Reaction Conditions Based on M...

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2nd International conference on Applied Statistics, Computational Mathematics, and Software engineering, ASCMSE 2023

作者： Zhao, Runhao Zhang, Jiayu Wang, Xianrui Su, Bolun Tan, Junze Ben, Niu Laboratory for Big Data and Decision National University of Defense Technology Changsha China

ISBN: (数字)9781510668195

ISBN: (纸本)9781510668188

In the preparation of chemical raw materials, there are often some optimization problems that are difficult for people to solve. Due to the complex interaction between various factors and the great difference between the theoretical model and the practice, an effective optimal design model is imminent. In this paper, an innovative mixed statistical model is proposed for optimal design, including five sub-models of ANOVA model, polynomial optimal regression analysis model, design uniformity model, two-step regression model, and optimization model. In this paper, the mixed statistical model is also applied to the study of the combination of catalyst and temperature in the preparation of C4 olefin production, which has high practicability. © 2023 SPIE.

关键词： Optimal systems

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Analysis of Microburst Disturbance Effects on Large Aircraft Longitudinal Open-Loop Flight Qualities Using CAP Criteria 15

Analysis of Microburst Disturbance Effects on Large Aircraft...

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15th Asia conference on Mechanical and Aerospace engineering, ACMAE 2024

作者： Cai, Yuhong Huang, Duojia Liu, Wenhao Qiao, Lina CEPREI Guangdong province Guangzhou511370 China Guangdong Provincial Key Laboratory of Intelligent Unmanned Systems for Reliability and DigitalVerification Guangdong province Guangzhou511370 China The Ministry of Industry and Information Technology Key Laboratory of Quality and Reliability Engineering Technology of Civil Aircraft and Aero-Engine Guangdong province Guangzhou511370 China

ISBN: (纸本)9781643685892

The pivotal influence of microburst phenomena on open-loop flight quality necessitates meticulous consideration during the conceptual design of large aircraft and flight control systems. This study delves into the implications of microburst wind field intensity on the longitudinal open-loop flight qualities of large aircraft, leveraging the microburst vortex model in conjunction with a longitudinal small disturbance linearized flight dynamics model. Our findings reveal that, within the downwash region, the intensity of the microburst wind field exerts a marginal influence on the equivalent short-period frequency and damping ratio of open-loop flight quality. Conversely, it significantly alters the pitch mode time constant and Control Anticipation Parameter (CAP). Notably, as the aircraft traverses distinct regions within the microburst wind field, characterized by a maximum horizontal wind speed variation of 20m/s, there is a discernible trend towards a degradation in flight quality, approaching the threshold of Level ii standards. © 2025 The Authors.

关键词： Open loop control

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Multi-objective optimal design of permanent magnet eddy current retarder based on NSGA-ii algorithm

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ENERGY REPORTS 2022年 8卷 1448-1456页

作者： Niu, Bowen Wang, Dazhi Pan, Pengyi Northeastern Univ Coll Informat Sci & Engn 3-11 Wenhua Rd Shenyang 110819 Peoples R China

As a new type of vehicle auxiliary braking device, permanent magnet eddy current retarder has a wide application prospect. In this paper, the linear layer analysis method and non-dominated sorting genetic algorithm-ii (NSGA-ii) are combined to optimize the parameters of permanent magnet eddy current retarder. Firstly, based on the linear layer model, the mathematical optimization model of permanent magnet eddy current retarder is established by taking the radial length of permanent magnet, the thickness of permanent magnet, the number of permanent magnets and the thickness of conductor disk as design variables, the braking torque and eddy current loss as optimization objectives. Secondly, the NSGA-ii algorithm is used to optimize the braking torque and eddy current loss of the permanent magnet eddy current retarder. Finally, the performance of the permanent magnet eddy current retarder after the optimization of the structural parameters is carried out by using ANSYS software to verify the accuracy and feasibility of the optimization results. The optimization algorithm used in this article solves the problem of poor adaptability to environmental changes and premature convergence in the late evolution of standard genetic algorithm. The results show that the NSGA-ii algorithm based on the layer analysis model has better computational results in the optimal design of structural parameters than the standard genetic algorithm. (C) 2021 Published by Elsevier Ltd.

关键词： Permanent magnet eddy current retarder Multi-objective optimization Linear layer model NSGA-ii algorithm ANSYS

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