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International Conference on Network and Information Systems for Computers (ICNISC)

作者： Yunqi Chen Jin Xu Measurement and Control Technology Research Institute China Coal Technology Engineering Group Chongqing Research Institute Chongqing China School of Big Data & Software Engineering Chongqing University Chongqing China

ISBN: (纸本)9781665453523

Coal is the most important basic energy supporting the development of the national economy, safe production and effective supervision and management are of great significance. Currently, the coal mine safety monitoring system can be monitored locally, but it cannot help the supervision department to realize the remote supervision and centralized supervision. Establishing a corresponding coal mine safety monitoring network system has become a urgent need of coal mine safety supervision. In the paper, we first study the service-oriented architecture(SOA), and describes the windows communication foundation(WCF) technology, the technology is a main way to achieve SOA architecture. Then combined with WCF technology, the function and logic structure of coal mine safety monitoring network system are designed. Finally, the network system of mine monitoring system based on SOA was realized in the background of a mine monitoring system networking project of a company.

关键词： Economics Companies Computer architecture Coal Safety Coal mining Service-oriented architecture

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Slow Feature Thermography for Non-Destructive Evaluation of Defects in Composite Materials

Slow Feature Thermography for Non-Destructive Evaluation of ...

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Data Driven control and Learning Systems (DDCLS)

作者： Kaixin Liu Xin Zhong Ping Chen Yun Dai Yi Liu The State Key Lab for Electronic Testing Technology North University of China China Department of Information and Communication Engineering North University of China Taiyuan China College of Mechanical Engineering Nantong Vocational University Nantong China Institute of Process Equipment and Control Engineering Zhejiang University of Technology Hangzhou China

ISBN: (数字)9798350361674

ISBN: (纸本)9798350361681

In recent years, various methods for processing and analyzing thermographic data have been applied in non-destructive testing to improve the visibility of defects. Representatively, traditional linear dimensionality reduction methods (e.g. principal component analysis) have achieved good results in thermographic data analysis. In this work, a slow feature thermography (SFT) method for non-destructive evaluation of defects in composite materials. Thermographic data can be regarded as a continuous time series generated by an infrared imager at different moments. Slow feature analysis algorithm is subsequently used to extract slow features of the thermal image sequence. Slow features refer to features that are unchanged or slowly changing in time-series data, such as the background of a thermal image. By extracting the slow features of data, the inhomogeneous background, noise and defect features contained in thermal images can be effectively distinguished. Test results on carbon fiber reinforced polymer specimens demonstrate the feasibility and effectiveness of the SFT method.

关键词： Image recognition Composite materials Time series analysis Infrared imaging Feature extraction Thermal noise Thermal analysis

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Reconfigurable Feed Network For Multi-Polar Antennas

Reconfigurable Feed Network For Multi-Polar Antennas

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International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Fengyuan Shi Juan Chen Wenjing Xu Jianfeng Yang Jing Tan School of information and communication engineering Xi'an Jiaotong University Xi'an China School of Information and control engineering Xi'an University of Architecture and Technology Xi'an China Department of Antenna Shanghai Aerospace Electronic Technology Institute Shanghai China

A reconfigurable feed network for multi-polar antennas is proposed in this article. It uses PIN diodes to make reconfigurable structure and change the output. The network can produce four kinds of output signal with only one input port. It has four output ports with specific phase delay, which uses differential-feed to suppress cross polarization. The simulated results show that the operating frequency range of the feed network is about 2.5-3.5 GHz with good matching and isolation performance. The variable polarization and wide band make it be a good choice for late-model multi-polar antennas with both linear and circular polarization.

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Research on Methodology for Digital Twin Construction of Powertrain Systems Under Time-Varying Conditions

SSRN

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SSRN 2024年

作者： Zhang, Dingge Ma, Biao Yu, Liang Xu, Xiaoyu Wang, Liyong Zhang, Jinle School of Mechanical Engineering Beijing Institute of Technology Beijing100081 China School of Software Shandong University Shandong250101 China Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing Information Science and Technology University Beijing100192 China China North Vehicle Research Institute Beijing100072 China

The dynamic characteristic investigation of powertrain system under time-varying conditions is highly relied on the dynamic torque signals of each component. However, methods that are sufficiently stable and efficient for obtaining these torque signals have not yet been realized. Thus, a five-dimensional digital twin system, including mechanism, behavior, geometric, statistical, and self-learning models, is established as a virtual mapping of physical system. These models are used to define solution methods, quantify characteristics, visualize displays, statistical analysis, and predict states, respectively. Then, a digital twin monitoring platform is established based on the virtual-real mapping, which can visualize dynamic characteristics of each component based on MQTT protocol. Moreover, the twin signals are verified from the perspectives of dynamics and kinematics through bench and real vehicle experiments, where the relative errors are less than 10%. In addition to the dynamic speed-torque signals of each component, twin signals also include jerk and sliding friction work used to evaluate the shifting quality. Through specific examples, it is demonstrated that the operating state for powertrain system can be monitored and evaluated based on all these twin signals, thus providing sufficient data support for further decision-making and feedback. © 2024, The Authors. All rights reserved.

关键词： Mapping

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Phase transition and piezoelectric property of (Ag,K)NbO_(3) ceramics

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Journal of Materiomics 2022年第4期8卷 863-872页

作者： Lin Chen Mingyuan Zhao Jing Wang Suwei Zhang Fuhua Sun Lei Zhao Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province College Physics Science and TechnologyHebei UniversityBaoding071002China Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing210016China Center for Advanced Measurement Science National Institute of MetrologyBeijing100029China Institute for Advanced Materials Hubei Normal UniversityHuangshi435002China

AgNbO_(3) is an antiferroelectric (AFE) material with double hysteresis loop. Both the antiferroelectricityand ferroelectricity can be enhanced by doping. Herein, the ferroelectricity of AgNbO_(3) ceramics wasenhanced via K-doping and the phase diagram of the (Ag_(1-x)K_(x))NbO_(3) ceramics was upgraded. In details,(Ag_(1-x)K_(x))NbO_(3) ceramics are ferrielectric (FIE) M1 phase as x=5.00-5.50 mol% and ferroelectric (FE) Ophase as x=5.75-6.00 mol% before poling, and FE O phase as x=5.00-6.00 mol% after poling at roomtemperature. With increasing temperature, (Ag_(1-x)K_(x))NbO_(3) ceramics show the phase evolutions from FIEM1, AFE M2 to paraelectric (PE) T phase at x=5.00-5.50 mol% and from FE O, FE T to PE T phase at x=5.75-6.00 mol% before poling, and from FE O, FE T to PE T phase at x=5.00-6.00 mol% after *** d33 values of 180 pC/N and 285 pC/N are obtained at the FE O-FE T and FE T-PE T phase *** work sheds light on a novel and promising lead-free piezoelectric system.

关键词： (Ag_(1-x)K_(x))NbO_(3)ceramics Phase diagram Piezoelectric property

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Uplink Security Analysis of Hybrid RF-FSO Cooperative Satellite-Aerial-Terrestrial Networks

Uplink Security Analysis of Hybrid RF-FSO Cooperative Satell...

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IEEE Globecom Workshops

作者： Yuanyuan Ma Zhan Xu Lu Tian Ruxin Zhi Xuhui Ding Xiangyuan Bu Key Laboratory of Modern Measurement and Control Technology Ministry of Education Key Laboratory of Information and Communication Systems Ministry of Information Industry Beijing Information Science and Technology University Beijing Information Science and Technology University Beijing China School of Cyberspace Science and Technology Beijing Institute of Technology Beijing China School of Information and Electronics Beijing Institute of Technology Beijing China

This work investigates the secrecy outage per-formance of the uplink transmission of hybrid radio-frequency (RF)-free-space optical (FSO) cooperative satellite-aerial-terrestrial network (SATN). Specifically, we adopt most popular content wireless caching scheme at aerial relay, while a group of eavesdropping aerial terminals (Eves) try to over-hear the confidential information. In particular, considering the transmit antenna selection (TAS) at the source and the maximal ratio combining (MRC) at the aerial relay, and the randomness of satellite receiver, relay, and Eves, the secrecy outage performance of the cooperative uplink transmission in the considered SATN is investigated and a closed-form analytical expression for the end-to-end secrecy outage probability (SOP) is derived. Finally, Monte-Carlo simulations are shown to verify the accuracy of our analysis.

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Modulation recognition of composite signal based on ResNet and frequency domain graph 3

Modulation recognition of composite signal based on ResNet a...

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2021 3rd International Conference on Artificial Intelligence and Computer Science, AICS 2021

作者： Wang, Lijun Han, Yu Ge, Hongfang Zhao, Yongkuan Shen, Lei Science and Technology on Communication Information Security Control Laboratory Jiaxing China The 36th Research Institute of China Electronics Technology Group Corporation Jiaxing China School of Communication Engineering Hangzhou Dianzi University Hangzhou China

Aiming at the problem of composite signal recognition in measurement and control system, a modulation recognition method of composite signal is proposed based on clipped internal modulation signal frequency image and residual network. Residual network has the advantages of fast convergence and high recognition accuracy, which is used to realize the recognition of different modulation modes and different bandwidth signals. The experimental results show that, compared with the traditional decision tree algorithm and the constellation based CNN recognition algorithm, the recognition performance of the proposed method is improved by more than 3dB for the variable bandwidth composite modulation signal set (BPSK-FM and QPSK-FM with internal modulation bandwidth of 128kHz, BPSK-FM and QPSK-FM with internal modulation bandwidth of 2kHz and 2FSK-FM with internal modulation bandwidth of 32kHz and 2kHz). © Journal of Physics: Conference Series 2021.

关键词： Quadrature phase shift keying

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Modulation recognition of composite modulation signal based on two-fold digital receiver and goodness of fit test

Modulation recognition of composite modulation signal based ...

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2021 IEEE International Conference on Electronic technology, communication and Information, ICETCI 2021

作者： Lijun, Wang Yu, Han Pan, Zhou Hongfang, Ge Lei, Shen Science and Technology on Communication Information Security Control Laboratory Jiaxing China The 36th Research Institute of China Electronics Technology Group Corporation Jiaxing China School of Communication Engineering Hangzhou Dianzi University Hangzhou China

ISBN: (纸本)9781665432511

Aiming at the modulation recognition problem of mixed signal set {BPSK, QPSK, BPSK-FM, QPSK-FM} with unknown parameters, this paper proposes a modulation recognition algorithm based on two-fold PLL (phase locked loop) and goodness of fit test. The PLL is used to extract the features of the composite modulation signal, and the goodness of fit test is used to measure the distance of the phase cumulative distribution of the demodulation information. Theoretical analysis and simulation results show that the performance of the recognition method based on two-fold PLL and goodness of fit test is better than the widely used modulation recognition method based on constellation. ©2021 IEEE.

关键词： Phase locked loops

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Energy Efficiency Maximization for Secure Live Video Streaming in UAV Wireless Networks

Energy Efficiency Maximization for Secure Live Video Streami...

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IEEE Conference on Vehicular technology (VTC)

作者： Lan Yi Jiansong Miao Tao Zhang Yushun Yao Xiangyun Tang Zaodi Song School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China School of Software Engineering Beijing Jiaotong University Beijing China School of Information Engineering Minzu University of China Beijing China North Automatic Control Technology Institute Taiyuan China

ISBN: (数字)9798350387414

ISBN: (纸本)9798350387421

Unmanned aerial vehicles (UAVs) have shown great potential in live video streaming applications, especially in surveillance and reconnaissance. However, ensuring high quality of service (QoS) remains a challenge due to the dynamic nature of wireless channels. In this paper, we tackle the crucial challenge of energy-efficient and secure UAV-enabled live video streaming. To maximize long-term energy efficiency, we propose a cross-layer optimization framework that coordinates the adjustment of video coding parameters, wireless resource allocation, and UAV trajectory planning. We formulate the joint optimization as a constrained Markov decision process (CMDP) to capture the complex interdependencies between video quality, energy usage, and security risks. We introduce a new performance metric that captures the trade-off between video quality and energy consumption. The core of our method is a customized first-order constrained policy optimization, which efficiently handle complex real-world constraints like UAV battery capacities and end-to-end transmission delays. Our approach achieves scalability and sample efficiency with minimal gradient information. Through extensive system modeling and simulations under various network conditions, we validate the effectiveness of the proposed method compared with existing reinforcement learning algorithms.

关键词： Video coding Wireless networks Quality of service Streaming media Autonomous aerial vehicles Energy efficiency Quality assessment

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A Payment System for Electric Vehicles Charging and Peer-to-Peer Energy Trading 7

A Payment System for Electric Vehicles Charging and Peer-to-...

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7th International Conference on I-SMAC (IoT in Social, Mobile, Analytics and Cloud), I-SMAC 2023

作者： Kaushal, Rajanish Kumar Jain, Shubhi Shankar Rao, R Gowri Thirumalaimuthu, Babu Rawat, Ruchira Natrayan, L. Chandigarh University Department of Electrical Engineering Punjab Mohali Gharuan India Swami Keshvanand Institute of Technology Management and Gramothan Department of Electronics and Communication Rajasthan Jaipur302018 India Vel Tech Rangarajan Dr.Sagunthala R&d Institute of Science and Technology Department of Physics Tamil Nadu Chennai600062 India St. Joseph's College of Engineering Department of Instrumentation and Control Engineering Tamil Nandu Chennai600119 India Graphic Era Deemed to Be University Department of Computer Science & Engineering Uttarakhand Dehradun248002 India Saveetha School of Engineering Simats Department of Mechanical Engineering Tamil Nadu Chennai602105 India

ISBN: (纸本)9798350341485

The popularity of vehicles based on electricity is increasing as they are considered a sustainable mode of transportation. The charging infrastructure for electric vehicles are suffering various issues. There are limited availability of public charging stations, the high costs associated with installing private charging stations, and the high variability of electricity prices. The peer-to-peer (P2P) energy stability will be seen as a potential solution to facilitate electric vehicle (EV) charging in a manner that is both cost-effective and environmentally sustainable. The paper presents a novel system energy trading and charging payment for electric vehicles (EVs). The desired system enables EV owners to exchange surplus electricity with other EV owners in their location. The system being proposed utilizes blockchain technology to guarantee secure and transparent transactions. Additionally, it incorporates a smart contract to automate the trading and charging process. The system utilizes a dynamic pricing mechanism that adjusts in real-time to reflect the current electricity prices. This feature is designed to encourage electric vehicle owners to engage in energy stabilization during maximum usage hours. The Optimistic results shows that the described system has the efficacy on minimising the cost of vehicle charging and to decrease peak demand on the grid. Additionally, the system encourages the utilization of renewable energy sources. © 2023 IEEE.

关键词： Electric vehicles

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