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Optimization of the Internet of Remote Things Data Acquisition Based on Satellite UAV Integrated Network

China Communications 2023年第7期20卷 15-28页

作者： Yuanyuan Yao Dengyang Dong Sai Huang Chunyu Pan Shuo Chen Xuehua Li Key Laboratory of Information and Communication Systems Ministry of Information IndustryBeijing Information Science and Technology UniversityBeijing 100101China Key Laboratory of Modern Measurement&Control Technology Ministry of EducationBeijing Information Science and Technology UniversityBeijing 100101China Key Laboratory of Universal Wireless Communications Ministry of EducationBeijing University of Posts and TelecommunicationsBeijing 100876China

In order to achieve dependable and efficient data acquisition and transmission in the Internet of Remote Things(IoRT),we investigate the optimization scheme of IoRT data acquisition under the unmanned aerial vehicle(UAV)-low earth orbit(LEO)satellite integrated space-air-ground network,in which the UAV acquires data from massive Internet of Things(IoT)devices in special *** combine with the actual scenario,we consider two different data types,that is,delay-sensitive data and delay-tolerant data,the transmission mode is accordingly divided into two *** delay-sensitive data,the data will be transmitted via the LEO satellite relay to the data center(DC)in *** delay-tolerant data,the UAV will store and carry the data until the acquisition is completed,and then return to *** to nonconvexity and complexity of the formulated problem,a multi-dimensional optimization Rate Demand based Joint Optimization(RDJO)algorithm is *** algorithm first uses successive convex approximation(SCA)technology to solve the non-convexity,and then based on the block coordinate descent(BCD)method,the data acquisition efficiency is maximized by jointly optimizing UAV deployment,the bandwidth allocation of IoRT devices,and the transmission power of the ***,the proposed RDJO algorithm is compared with the conventional *** consequences demonstrate that the efficiency of IoRT data acquisition can be greatly improved by multi-parameter optimization of the bandwidth allocation,UAV deployment and the transmission power.

关键词： Internet of Remote Things dataacquisi-tion unmanned aerial vehicle LEO satellite

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STUDY ON THE SENSITIVITY MECHANISM OF LOW-COUPLED HEAT FLOW BIAXIAL MEMS ACCELEROMETERS 10

STUDY ON THE SENSITIVITY MECHANISM OF LOW-COUPLED HEAT FLOW ...

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10th International Symposium on Test Automation and Instrumentation, ISTAI 2024

作者： Liu, Junyu Piao, Linhua Beijing Key Laboratory of Sensors China Modern Measurement and Control Technology Ministry of Education China

ISBN: (纸本)9781837242672

A new sensitive structure of a low-coupling heat flow biaxial MEMS accelerometer is proposed and its sensitivity mechanism is investigated. A three-dimensional model of the sensitive structure was created by COMSOL, and the temperature field of the sensitive structure was calculated using the finite element method. The results show that the accelerometer has a temperature sensitivity of 1.71 K·g-1 in the X-axis, 1.69 K·g-1 in the Y-axis, 0.7% cross-coupling, and the sensitivity of both X-axis and Y-axes was 1.5 mV·g-1 with a heater power of 5mW and an acceleration of [-1~1] g. The accelerometer is characterized by a high sensitivity and a low cross-coupling, which lays a theoretical basis for the optimization of the structure in the following years. © The Institution of Engineering & technology 2024.

关键词： Accelerometers

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High temperature piezoelectric properties and ultra-high temperature sensing properties of bismuth tungstate

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Journal of Advanced Ceramics 2024年第12期13卷 1931-1942页

作者： Yaoyao Liao Qingwei Liao Yuxiang Yin Yinghao Li Mingkun Du Hanqing Zhao Lingxia Li Yuying Wang Lei Qin Key Laboratory of Sensors Beijing Information Science&Technology UniversityBeijing 100192China Key Laboratory of Modern Measurement&Control Technology Ministry of EducationBeijing Information Science&Technology UniversityBeijing 100192China School of Microelectronics Tianjin UniversityTianjin 300072China Nanjing Light Xingjian Biological Technology Co. Ltd.Nanjing 210012China

In energy generation,aerospace,and other related industries,high-temperature acceleration sensing is an essential tool for diagnostic testing,troubleshooting,and quality ***,commercial acceleration sensors have a maximum operating temperature of no more than 550℃.The study of high-temperature piezoelectric ceramics is important for increasing the operating temperature of *** this work,high-temperature Bi_(2)Mo_(x)W_(1−x)O_(6)(BW)piezoelectric ceramics were prepared,and an all-mechanical center compression high-temperature acceleration sensor was designed and *** results show that when the doping ratio is x=0.001,the ceramic sample has the best performance:the relative density of 92%,the piezoelectric coefficient(d33)of 15 pC·N^(−1),the quality factor(Q_(m))of 1642,the dielectric constant(ε)of 307(1 kHz),and the dielectric loss(tanδ)of 0.33(1 kHz).With increasing B-doped Mo^(6+)content,the Curie temperatures of the ceramics are 975,966,961,and 967℃and the high-temperature annealing temperatures are 975,975,950,and 950°C,*** to tests of temperature performance,the developed BW high-temperature sensor has a good linear response and *** room temperature,a BW high-temperature piezoelectric sensor can be used stably within 1 kHz,and the average sensitivity is 3.259 pC·g^(−1).At 800℃,this device can be used in the frequency range of 0.1–1.1 kHz,and the average sensitivity is 3.305 pC·g^(−1);the linearity is greater than 0.99,and the sensitivity deviation is 1.4%.

关键词： high-temperature sensing acceleration sensor bismuth tungstate(BW) piezoelectric

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RESEARCH ON THE MECHANISM OF A HIGH ROBUSTNESS PRESSURE SENSOR BASED ON HEAT CONDUCTION 10

RESEARCH ON THE MECHANISM OF A HIGH ROBUSTNESS PRESSURE SENS...

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10th International Symposium on Test Automation and Instrumentation, ISTAI 2024

作者： Zhang, Yonghao Piao, Linhua Sun, Jiahao Beijing Key Laboratory of Sensors China Modern Measurement and Control Technology Ministry of Education China

ISBN: (纸本)9781837242672

In this paper, a structure of high robustness pressure sensor based on heat conduction is proposed and its mechanism is studied. The temperature field in the structure of a high robustness pressure transducer based on heat conduction is calculated by COMSOL, and the temperature difference under the corresponding pressure is calculated. The calculation results based on the three-dimensional physical model of the sensor show that the temperature difference of the highly robust pressure sensor based on heat conduction decreases with the increase of pressure, and the pressure of the sensor is inversely proportional to the temperature difference, The temperature sensitivity of the high robustness pressure sensor based on heat conduction in the range of 0 ~ 49N is -0.021 K/N and the nonlinearity is 11.02%. The temperature sensitivity of the high robustness pressure sensor based on heat conduction in the range of 50 ~ 60N is -1.184 K/N and the nonlinearity is 7.85%. Through the establishment of the three-dimensional physical model structure of the high-robustness pressure sensor based on heat conduction and the calculation results of the sensor, the mechanism of the high-robustness pressure sensor based on heat conduction is revealed, which lays a theoretical foundation for the subsequent optimization of the parameters and structure of this kind of sensor. © The Institution of Engineering & technology 2024.

关键词： Pressure transducers

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STUDY ON RESPONSE TIME OF Z-AXIS THERMAL EXPANSION FLOW GYROSCOPE 10

STUDY ON RESPONSE TIME OF Z-AXIS THERMAL EXPANSION FLOW GYRO...

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10th International Symposium on Test Automation and Instrumentation, ISTAI 2024

作者： Piao, Linhua Tong, Jiacheng Beijing Key Laboratory of Sensors China Modern Measurement and Control Technology Ministry of Education China

ISBN: (纸本)9781837242672

This paper presents a method to derive the gyro response time of thermal expansion flow in Z-axis micro-electro-mechanical systems (MEMS). First, the structure of the thermal expansion gyro is given and its working principle is explained in detail. Secondly, according to the sensitive mechanism of the thermal expansion gyro and its heat transfer mode, the theoretical model of the response time of the thermal expansion gyro is derived, and the calculation formula of the response time of the thermal expansion gyro is given. Finally, in order to verify the response time calculation formula derived in this paper, the finite element method is used. Based on the three-dimensional physical model of the thermal expansion gyro, the theoretical response time of the gyro is calculated and verified. The results of calculation and finite element verification show that: (1) the theoretical model and formula of response time of thermal expansion gyro are in agreement with the verification data;(2) With the increase of the thermal conductivity of the gas, the area of the thermal wire, and the decrease of the specific heat capacity and density of the gas, the response time gradually decreases. (3) The gyro response time calculated for Z-axis thermal expansion flow is 669.88 ms. The formula for calculating the response time of thermal expansion gyro presented in this paper lays a theoretical foundation for optimizing the response time of thermal expansion gyro. © The Institution of Engineering & technology 2024.

关键词： Density of gases

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A Defective Ground Structure Design for Reducing Coupling between Microstrip Antenna Arrays

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Progress in Electromagnetics Research C 2025年 151卷 123-130页

作者： Xu, Junhao Wang, Yafei Wang, Xiaozhe Li, Zhensong Key Laboratory of Information and Communication Systems Ministry of Information Industry Beijing Information Science and Technology University Beijing100101 China Key Laboratory of Modern Measurement & Control Technology Ministry of Education Beijing Information Science and Technology University Beijing100101 China

In order to reduce the coupling between dense antenna arrays in multiple input multiple output (MIMO) systems, this paper proposes a method to reduce the coupling between microstrip antenna arrays by utilizing a defected ground structure (DGS), which consists of "W"-shaped slits etched in the ground plane. Simulation results show that the structure can achieve −46.6 dB isolation between antenna arrays. To verify the effectiveness of the structure, the microstrip antenna arrays loaded with this DGS are fabricated and measured, and the measured results are consistent with the simulated ones, which verifies the effectiveness of the structure. © 2025, Electromagnetics Academy. All rights reserved.

关键词： Antenna arrays

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Viewpoint Rotation Prediction based Resource-Efficient Holographic Type Communication in EON enabled 6G RAN 22

Viewpoint Rotation Prediction based Resource-Efficient Holog...

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22nd International Conference on Optical Communications and Networks, ICOCN 2024

作者： Wang, Xin Zhang, Chengyuan Wang, Yafei Li, Xuehua Key Laboratory of Information and Communication Systems Ministry of Information Industry Key Laboratory of Modern Measurement & Control Technology Beijing China

A LSTM based viewpoint rotation prediction enabled resource-efficient holographic type communication is investigated in EON enabled 6G RAN. The CensNet enhanced PPO is used for feature extraction based DU-CU deploymen... 详细信息

ISBN: (纸本)9798350367652

关键词： Holography

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Exploiting the Direct Link in IRS Assisted NOMA Networks with Hardware Impairments

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Computer Modeling in Engineering & Sciences 2023年第7期136卷 767-785页

作者： Ziwei Liu Xinwei Yue Shuo Chen Xuliang Liu Yafei Wang Wanwei Tang Key Laboratory of Modern Measurement&Control Technology Ministry of EducationSchool of Information and Communication EngineeringBeijing Information Science and Technology UniversityBeijing100101China The Party Committee Office Yellow River Conservancy Technical InstituteKaifeng475001China Tangshan University Tangshan063000China

Hardware impairments(HI)are always present in low-cost wireless *** paper investigates the outage behaviors of intelligent reflecting surface(IRS)assisted non-orthogonal multiple access(NOMA)networks by taking into account the impact of ***,we derive the approximate and asymptotic expressions of the outage probability for the IRS-NOMA-HI *** on the asymptotic results,the diversity orders under perfect self-interference cancellation and imperfect self-interference cancellation scenarios are obtained to evaluate the performance of the considered *** addition,the system throughput of IRS-NOMA-HI is discussed in delay-limited *** obtained results are provided to verify the accuracy of the theoretical analyses and reveal that:1)The outage performance and system throughput for IRS-NOMA-HI outperforms that of the IRS-assisted orthogonal multiple access-HI(IRS-OMA-HI)networks;2)The number of IRS elements,the pass loss factors,the Rician factors,and the value of HI are pivotal to enhancing the performance of IRS-NOMAHI networks;and 3)It is recommended that effective methods of reducing HI should be used to ensure system performance,in addition to self-interference cancellation techniques.

关键词： Hardware impairments imperfect SIC intelligent reflecting surface non-orthogonal multiple access outage probability

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DEEP CNN FUSING ATTENTION AND LGBM CLASSIFIER FOR HIGH-ACCURACY HAND GESTURE RECOGNITION 10

DEEP CNN FUSING ATTENTION AND LGBM CLASSIFIER FOR HIGH-ACCUR...

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10th International Symposium on Test Automation and Instrumentation, ISTAI 2024

作者： You, Zhicong Lu, Wangdong Zhu, Chunmei Key Laboratory of Modern Measurement & Control Technology Ministry of Education Beijing Information Science & Technology University Beijing China

ISBN: (纸本)9781837242672

Gesture recognition has been widely used in automation and medical and smart-home. The adaptability and accuracy of traditional machine learning algorithms are limited by feature extraction and classifier selection, and the recognition accuracy is low as well as the robustness is poor. In our work, an improved CNN (Convolutional Neural Networks) combined with an LGBM (Lightweight Gradient Boosting Machine) hand gesture recognition method is proposed to improve the performance of hand gesture recognition. The method designs a 4-layer CNN structure and integrates a CBAM (Convolutional Block Attention Module) in the network to enhance the model's ability to learn and extract features. Furthermore, the extracted features are fed into an LGBM classifier for gesture classification, which improves the accuracy of gesture classification and reduces the risk of model overfitting. The accuracy of the 16 types of static gesture recognition reaches 97.89% in our dataset. An improvement of more than 10% is obtained in comparison with traditional machine learning classification algorithms. It demonstrates promising prospects for gesture recognition. © The Institution of Engineering & technology 2024.

关键词： Convolutional neural networks

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RESEARCH ON THREE-DIMENSIONAL FUSION METHOD OF SURVEILLANCE VIDEO IN SMART PARK 10

RESEARCH ON THREE-DIMENSIONAL FUSION METHOD OF SURVEILLANCE ...

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10th International Symposium on Test Automation and Instrumentation, ISTAI 2024

作者： Li, Haowei Zuo, Yunbo Hu, Huan Chen, Sai Zheng, Yifan Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing Information Science and Technology University Beijing China

ISBN: (纸本)9781837242672

The three-dimensional video fusion technology is increasingly becoming an important part of smart parks. In previous security work, surveillance videos are typically displayed in a multi-screen layout, making it difficult to directly analyze the spatial positions of scenes and objects in the monitoring footage. Based on this, a real-time fusion rendering method for RTSP video streams and three-dimensional park models is proposed, which uses texture projection to integrate real videos into virtual three-dimensional models, achieving the fusion of multiple video sources. For scenarios with multiple videos at the same location, a viewpoint-based weighted method is adopted to achieve texture overlay rendering. Finally, a smart park surveillance video fusion platform is built based on the *** framework, supporting real-time rendering on the web. The system also provides various interaction methods, including roaming and viewpoint switching, making it convenient for personnel to monitor key areas. Simultaneously, it achieves the effect of roaming in virtual three-dimensional scenes, enhancing the stereoscopic presentation of real scenes in surveillance videos. The system demonstration proves that effectively combining real-time surveillance videos with three-dimensional models results in better spatial presentation of videos and enhances the ability to discern the actual positions of scenes within the smart park. © The Institution of Engineering & technology 2024.

关键词： Rendering (computer graphics)

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