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7th International Conference on Computer and Communications, ICCC 2021

作者： Mou, Xinglin Li, Hao Yan, Feng Ding, Kai Wu, Tao Xia, Weiwei Shen, Lianfeng Southeast University National Mobile Communications Research Laboratory Nanjing210096 China Science and Technology On Near-Surface Detection Laboratory Wuxi214035 China Jiangsu ZhongLi Electronic Information Sci-Tech Co. Ltd Changshu215542 China

ISBN: (纸本)9781665409506

In this paper, a priority based adaptive MAC protocol (PM-MAC) is proposed for UAV ad hoc networks. Firstly, in the protocol, the arriving packets are classified into different queues according to the priority of services. A Markov chain model is proposed to analyze the channel access probabilities of different queues. and it is ensured that packets with high priority can access the channel with high probability. Secondly, the size of contention window is adaptively adjusted based on backoff times and the current packet size. Finally, simulation results show that PM-MAC can guarantee the access requirements of high priority packets, and compared with the traditional backoff method, the backoff mechanism in PM-MAC achieves better performance in access success rate, channel utilization and backoff delay. © 2021 IEEE.

关键词： Unmanned aerial vehicles (UAV)

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Research on Dynamic Attitude Estimation and Control of Tricycle Based on MEMS Sensing 2

Research on Dynamic Attitude Estimation and Control of Tricy...

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2nd Annual IEEE International Conference on Micro/Nano Sensors for Al, Healthcare, and Robotics, NSENS 2019

作者： Rong, Yingjiao Ding, Weixuan Wang, Xinan Shi, Guangyi Science and Technology on Near-Surface Detection Laboratory Wuxi China Peking University Shenzhen Graduate School Shenzhen China

ISBN: (纸本)9781728166513

Today's science and technology develop rapidly with the passage of time. In the highly competitive environment, everyone's time is twenty-four hours a day. No one can have more than one minute. Or less have a minute to go, so if you want to improve your competitiveness, efficient scheduling time is very important, people's daily needs for efficiency are also growing. In the process of moving these vehicles, how to move the same distance with others in less time, this demand and efficiency can also be seen from the tools we now use to produce vehicles (such as tricycles).In the high-precision control system design of the self-balancing vehicle of the tricycle vehicle, in addition to the high-precision inclination sensor to measure the dynamic inclination angle, the steering control has an absolute value encoder to learn the angle of the steering of the tricycle body. More importantly, in addition to the rear axle drive system on the wheel of the tricycle body itself, we also installed a stepper motor to control the balance of the tricycle body, so that the tricycle body can be at a higher speed. Under the steady steering, the tricycle body will not roll *** attitude measurement is a very important aspect in the design of high-precision control systems for self-balancing vehicles of tricycle vehicles. Because the motor is an open-loop system, we need to use the tilt sensor for attitude measurement to obtain high-precision angle values, and the obtained angle value and the motor form a closed-loop control system to achieve more precise motor control to control the tricycle body. balance. So we need to measure the angle change very accurately, because a single axial attitude tilt sensor can't meet our requirements, and because there are too many shortcomings, we can't get more accurate values in a dynamic environment, so we use A six-axis sensor that helps us get better precision and precision. Finally, we use the VEKF-based algorithm to eliminate the numerical

关键词： Automobile steering equipment

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Wavelet Packet Energy Entropy Based Feature Analysis of Seismic Signals from Vehicle Targets 5th

Wavelet Packet Energy Entropy Based Feature Analysis of Seis...

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5th International Conference on Intelligent Computing, Communication and Devices, ICCD 2019

作者： Ding, Kai Li, Xinghua Li, Hao Ma, Huayuan Fan, Lei Qi, Xiaogang Science and Technology on Near-Surface Detection Laboratory The First Scientific Research Institute of Wuxi Wuxi214035 China Army Engineering University of PLA Nanjing210007 China School of Mathematics and Statistics Xidian University Xi’an710071 China

ISBN: (纸本)9789811558863

The seismic signals of two typical types of vehicle targets—wheeled vehicles and tracked ones—were collected in field test, and decomposed at multiple levels using wavelet packet transformation (WPT), which has a multiresolution feature, to obtain detailed energy distribution. A method for computing the energy entropy of the seismic signals from a vehicle target was derived on the concept of information entropy based on probability statistics. The energy entropies of the seismic signals from the two types of vehicles were then analyzed, and the results indicate that the energy entropy reflects the seismic signals of different types of vehicles: the energy entropies of the seismic signals of the wheeled vehicles were greater than that of the tracked vehicles. In conclusion, this paper proposes to use the energy entropy as a new characteristic quantity of seismic signals from vehicle targets for feature extraction, which may pave a new way for identification of seismic signals from different vehicles. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Feature extraction

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A Dual-band Broadband Conical Beam Antenna Based on TM₀₁ and TM₀₂ mode

A Dual-band Broadband Conical Beam Antenna Based on TM₀₁ a...

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Asia-Pacific Conference on Microwave

作者： Chuchu Shan Shuai Zhang Hui Xue Li Wu Yingjiao Rong School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing P. R. China Shanghai Radio Equipment Research Institute Shanghai P. R. China Science and Technology on Near Surface Detection Laboratory Wuxi P. R. China

A dual-band broadband conical beam antenna operating at Ku-/ Ka-band is presented in this paper. The proposed antenna adopts a novel across-layer folded structure which consists of two substrates. A circular patch with coupling slot is printed on the lower substrate as a monopole at Ku-band, and a circular patch and a loop patch are printed on the upper substrate to achieve operating at Ka-band. A wideband performance is obtained by introducing shorting vias to excite TM 01 and TM 02 mode in both bands. The simulation results show that the proposed antenna operates at 11.74 GHz-14.47 GHz in Ku-band and 32.20 GHz-35.63 GHz in Ka-band with 10 dB impedance bandwidth of 20.8% and 10.1%. And conical beam radiation patterns are achieved within the two bands, the peak gains in the lower and upper bands are 5.4 dBi and 9.9 dBi respectively.

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Ground penetrating radar target detection method based on optimized faster RCNN and k-means clustering

Ground penetrating radar target detection method based on op...

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IET International Radar Conference (IRC 2023)

作者： Changle Xin Wentai Lei Chaopeng Luo Wei Xue School of Computer Science and Engineering Central South University Changsha People's Republic of China School of Electronic Information Central South University Changsha People's Republic of China Science and Technology on Near-Surface Detection Laboratory Wuxi People's Republic of China

ISBN: (数字)9781837240982

Ground Penetrating Radar (GPR) technology is a widely used detection technology for underground target objects, which can perform non-destructive detection of underground targets. Due to the complexity of the underground environment and the interference of clutter, manual processing of GPR data is a time-consuming and laborious task. Therefore, an accurate and fast automatic underground target detection method is urgently needed. We propose a method that can achieve fast goals in complex multi-goal situations. The simplified ResNet-50 network is used to detect dense intersecting hyperbolic curves and reduce the computation of the network. At the same time, we use k-means clustering algorithm to optimize the anchor in faster-Rcnn based on the characteristics of GPR hyperbola. In addition, this method is also suitable for target detection on GPR images under random media.

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Deep Learning Based Localization Scheme for UAV Aided Wireless Sensor Networks

Deep Learning Based Localization Scheme for UAV Aided Wirele...

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International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Hanjun Zhang Feng Yan Hao Li Kai Ding Tao Wu Weiwei Xia Lianfeng Shen National Mobile Communications Research Laboratory Southeast University Nanjing China Science and Technology on Near-Surface Detection Laboratory Wuxi China Jiangsu ZhongLi Electronic Information Sci-Tech Co. Ltd Changshu China

ISBN: (纸本)9781665450867

In this paper, a deep learning based localization scheme is proposed for unmanned aerial vehicle (UAV) aided wireless sensor networks (WSN s), The scheme contains two components which are ranging and localization. In the ranging component, a UAV works as a data collector and calculates the distances between the ground sensor nodes. In the localization component, a localization convolutional neural network (CNN) is built and trained to estimate the nodes coordinates using the ranging information. Simulations results show that the proposed localization scheme has a higher accuracy comparing with a related method.

关键词： Location awareness Deep learning Wireless communication Training Wireless sensor networks Simulation Signal processing

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Camouflaged target tracking based on a scaleadaptive correlation filter algorithm

Camouflaged target tracking based on a scaleadaptive correla...

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Chinese Automation Congress (CAC)

作者： Yang Liu Congqing Wang Yongjun Zhou College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing China Science and Technology on Near-Surface Detection Laboratory Wuxi China

ISBN: (数字)9781665426473

ISBN: (纸本)9781665426480

Considering the continuous development of intelligent technology and the wide application prospects of unmanned aerial vehicles (UAVs), the target tracking technology will be applied in future combat. In order to deal with the complex battlefield environment and the scale change of the target during tracking, an improved scale-adaptive correlation filter algorithm based on fusion features is proposed to realize the tracking of military personnel. First, the fast histogram of oriented gradient (FHOG) features and the local binary pattern (LBP) features are adaptively weighted and fused to achieve the target location. Then the translation filter of kernelized correlation filters(KCF) and the scale filter of discriminative scale space tracking(DSST) are combined to comprehensively improve the calculation speed and scale adaptation performance of the algorithm and track the target in time. The experimental results prove the robustness and practicability of the proposed method, which can accurately track military targets in real time.

关键词： Histograms Target tracking Correlation Automation Filtering algorithms Autonomous aerial vehicles Robustness

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Wide-beam Vivaldi Antenna

Wide-beam Vivaldi Antenna

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Progress in Electromagnetic Research Symposium (PIERS)

作者： Jinjing Ren Zhongyuan Yu Qi Tang Research Center for Electromagnetic Environmental Effects Southeast University Nanjing China Science and Technology on Near-surface Detection Laboratory Wuxi China

ISBN: (纸本)9781665409889

Vivaldi antenna has superior radiation performance and simple process, which can be used for common radar ranging. However, as a transmitting antenna, the Vivaldi antenna beam width is insufficient. In this paper, the traditional radiation structure of Vivaldi antenna is improved. A wide beam Vivaldi antenna based on elliptical slot structure is proposed, and the size is 150 mm×150 mm×1.6 mm, and FR4 is selected as the dielectric layer material. In the 2.5GHz-4GHz frequency range, the half-power beam width of the antenna reaches 90°, and the maximum reaches 128.3°. The gain is greater than 3.26 dBi and the directivity consistency is good. In the direction finding and ranging experiment, the antenna was used as the transmitting source of the transceiver system to measure the distance of metal objects. The ranging results are in high agreement with the actual results, indicating that the performance of the antenna is good.

关键词： Antenna measurements Simulation Vivaldi antennas Transmitting antennas Metals Directive antennas Transformers

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Numerical Simulation of Subsurface Penetrating Radar in Isidis Planitia on Mars for China's First Mission to Mars 9

Numerical Simulation of Subsurface Penetrating Radar in Isid...

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9th International Conference on Environmental and Engineering Geophysics, ICEEG 2020

作者： Wang, Ying Feng, Xuan Liang, Wenjing Zhou, Haoqiu Dong, Zejun Li, Xiaotian Xue, Cewen College of Geo-Exploration Science and Technology Jilin University No.938 Xi Min Zhu Street Changchun China Science and Technology on Near-Surface Detection Laboratory Wuxi China Institute of National Development and Security Studies Jilin University No.2699 Qianjin Street Changchun China No.938 XiMin Zhu Street Changchun China

The water ice exploration mission is an important scientific target of China's first Mission to Mars. The high frequency full polarimetric subsurface penetrating radar (SPR) system onboard the landing rover can carry out high-resolution imaging of the near-surface area of Mars, which is an important tool for detecting the presence of shallow water ice and soil structure. At present, most of the radar detection simulations are based on low-frequency antennas to analyze the geological structure of Mars down to several kilometers, with low resolution, which is difficult to detect the subsurface structure in the near-surface accurately. Considering topographic relief, interface roughness, subsurface rock, water ice, and permittivity changes at different layers, a three-dimensional near-surface model in the Isidis Planitia on Mars is established. The interpretation of the forward simulation results is of reference value for future Mars exploration missions. © Published under licence by IOP Publishing Ltd.

关键词： Rovers

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A 3d Non-Stationary Geometry-Based Stochastic Model for Uav Air-to-Ground Mimo Channels

SSRN

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SSRN 2022年

作者： Zhou, Tianxiang Yan, Feng Li, Hao Pang, Jingming Ding, Kai Xia, Weiwei Shen, Lianfeng National Mobile Communications Research Laboratory Southeast University Nanjing210096 China Science and Technology on Near-Surface Detection Laboratory Wuxi214035 China Jiangsu ZhongLi Electronic Information Sci-Tech Co. Ltd Changshu215542 China

In this paper, a three-dimensional geometry-based stochastic model is proposed for unmanned aerial vehicle (UAV) non-stationary air-to-ground multi-input multi-output (MIMO) channels. In the proposed model, the scatterers around the UAV and ground station are assumed to be distributed on the surface of two cylinders respectively. In order to describe the channel non-stationarity, the impact of rotations and accelerated motion of UAV are taken into account. The computation method of the corresponding time-variant parameters are theoretically deduced, including UAV antenna array angles, time delays and maximum Doppler frequencies. Based on the model, the channel statistical properties such as space-time correlation functions are further derived. Simulation results show that the increasing accelerations of the UAV and ground station can reduce the time correlation function and increase the channel non-stationarity in time domain. The UAV rotation has an important influence on the spatial correlation function, and the influence of rolling is more significant than that of pitching. © 2022, The Authors. All rights reserved.

关键词： Unmanned aerial vehicles (UAV)

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