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2022 International Conference on Power Energy Systems and Applications, ICoPESA 2022

作者： Ji, Ping Zhu, Quan Key Lab. of Unmanned Aer. Vehicle Development Data Application of Anhui Higher Education Institutes Ma'anshan China Maanshan Wireless Sensor Network and Intelligent Perception Engineering Technology Research Center Wanjiang China University of Technology Maanshan China Maanshan University Ma'anshan China

ISBN: (纸本)9781665410977

With the rapid development of clean energy generation technology, a large number of distributed power sources are integrated into the local power grid, resulting in the intensification of disturbance signals in the power grid. It is particularly important to effectively classify and identify the disturbance signals in the power grid. This paper presents a recognition method based on energy difference and support vector machine. The method extracts signal feature vectors by calculating the energy difference of power grid signals and sends them to support vector machine for classification. Experiments were carried out on the power grid signals with and without noise. Experiments show that this method can effectively classify and recognize the disturbance signals, and the recognition rate is greatly improved. The effectiveness of the method is proved. This paper provides a theoretical basis for the improvement of power grid quality and intelligent monitoring management in the future. © 2022 IEEE.

关键词： Support vector machines

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Analysis of Satellite Interference Source Location Algorithm

Analysis of Satellite Interference Source Location Algorithm

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International Conference on Computer and Communications (ICCC)

作者： Hui Yan Laiding Zhao Gengxin Zhang Cen Ruan Key Laboratory of Broadband Wireless Communication and Sensor Network Technology "Telecommunication and Network" National Engineering Research Center Nanjing University of Posts and Telecommunications Nanjing China

ISBN: (纸本)9781665409513

There are many methods and principles of satellite interference source location, but no matter which method is chosen, the positioning equation is nonlinear. Therefore, it is very important to solve the nonlinear equations accurately for the accuracy of the final positioning results. In this paper, an improved particle swarm optimization (PSO) algorithm is proposed. Based on the combination of PSO and grid search algorithm, the precision requirement is set in the iterative stop condition. When the calculation results meet the set precision, iteration can be stopped. Compared with the ordinary particle swarm optimization algorithm, the results can be obtained more quickly and accurately.

关键词： Satellites Nonlinear equations Military computing Interference Position measurement Iterative algorithms Mathematical models

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Bifurcation Analysis of the Colpitts Oscillator Driven by the Chaotic Pulse Signal

Bifurcation Analysis of the Colpitts Oscillator Driven by th...

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International Conference in Electrics, Communication and Automatic Control, ECAC 2011

作者： Li, Chunbiao Hu, Wen Ma, Wei Department of Mechanical and Electrical Engineering Jiangsu Institute of Economic and Trade Technology Nanjing210007 China State Key Laboratory of Millimeter Waves Southeast University Nanjing210096 China Engineering Technology Research and Development Center of Jiangsu Circulation Modernization Sensor Network Jiangsu Institute of Economic and Trade Technology Nanjing210007 China School of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing210016 China

ISBN: (纸本)9781441988485

The dynamical behavior of Colpitts oscillator driven by chaotic pulse signal that is based on the bifurcation method is analyzed in this study. We present simulation results of bifurcation in the driven Colpitts system. Colpitts oscillator driven by sinusoidal signal and periodic pulse signal are taken as contrast to demonstrate the nonlinear approach for both the sinusoidal and the chaotic mode of operation. With the appropriate choice of driving signal, the Colpitts circuit can process a robust chaotic state. The bifurcation diagram shows a periodic or chaotic oscillation state determined by the factor of the driving signal. © Springer Science+Business Media, LLC 2012.

关键词： Bifurcation (mathematics)

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Joint DBF and SAO parallel filtering based on multithread load balancing

Joint DBF and SAO parallel filtering based on multithread lo...

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2020 International Symposium on Automation, Information and Computing, ISAIC 2020

作者： Ma, Hao Hu, Dong Li, Yi Jiangsu Province’s Key Lab of Image Procession and Image Communications Nanjing210003 China Education Ministry’s Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing210003 China Education Ministry’s Engineering Research Center of Ubiquitous Network and Heath Service Nanjing University of Posts and Telecommunications Nanjing210003 China

This paper presents a joint parallel loop filtering algorithm based on multi-thread load balancing in HEVC decoding, which implements the parallel processing of deblocking filtering (DBF) and sample adaptive compensation (SAO). Because of the diversity of video, the texture of different regions in an image is also different, which leads to various CTU partition methods. Therefore, the number of the boundary to be filtered is greatly different, resulting the computation load among multiple threads unbalanced in parallel processing. To solve this problem, an area division scheme is proposed, which divides the image into multiple areas, and the number of boundaries to be filtered in each area is similar. Then, the mapping relationship table is used to allocate these areas to multiple threads for parallel processing, so as to achieve the load balancing among the filtering threads. Finally, the cache technology is used to combine DBF and SAO to reduce the delay between them and improve the overall parallelism of the loop filter. Experimental results show that the performance of the proposed load balancing joint filtering algorithm is 8.15% higher than the previous scheme. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Textures

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Scale adaptive block target tracking based on multi-layer convolution features and Kernel correlation filter

Scale adaptive block target tracking based on multi-layer co...

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2020 International Symposium on Automation, Information and Computing, ISAIC 2020

作者： Zhang, Ting Hu, Dong Zhang, Jing Jiangsu Province’s Key Lab of Image Procession and Image Communications Nanjing210003 China Education Ministry’s Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing210003 China Education Ministry’s Engineering Research Center of Ubiquitous Network and Heath Service Nanjing University of Posts and Telecommunications Nanjing210003 China

Target tracking is currently a hot research topic in Computer Vision and has a wide range of use in many research fields. However, due to factors such as occlusion, fast motion, blur and scale variation, tracking method still needs to be deeply studied. In this paper, we propose a block target tracking method based on multi-convolutional layer features and Kernel correlation filter. Our method divides the tracking process into two parts: target position estimation and target scale estimation. First, we block the target frame based on the condition number. Second, we extract the features by the convolutional layer and apply it to the kernel correlation filter to get the center position of different block targets. With the reliability of different blocks measured by the Barker coefficient, the overall target position center is obtained. Then, the affine transformation is adopted to achieve the scale adaptation. The algorithm in this paper is evaluated by the public video sequences in OTB-2013. Numerous experimental results demonstrate that the proposed tracking method can achieve target scale adaptation and effectively improve the tracking accuracy. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Target tracking

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Pyramid MIMO Dielectric Resonator Antenna with Circular Polarization Diversity

Pyramid MIMO Dielectric Resonator Antenna with Circular Pola...

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International Symposium on Antennas and Propagation (ISAP)

作者： B. J. Liu J. H. Qiu N. N. Wang X. Pan J. Ni S. Yan School of Electronics and Information Engineering Harbin Institute of Technology Harbin China Department of Network Heilongjiang Meteorological Data Center Harbin China

In this paper, a pyramid MIMO dielectric resonator antenna (DRA) with circular polarization diversity is proposed. It consists of two DRA elements with same dielectric resonator (DR) and rectangular slot fed by microstrip line. The proposed pyramid DR with given width to length ratio is easy to obtain circular polarization performance by rotating the DR to the slot. The difference between the two elements is the relative position of DR to the feeding slot. Two ports correspond to different DR to x- axial angles of 45° and 135° resulting in left-handed circular polarization and right-handed circular polarization. For the symmetry of MIMO antenna structure, two ports have the same impedance bandwidth of 4.65 GHz with the isolations between two ports higher than 21.8 dB under no extra method for reducing mutual coupling. In addition, axial ratio bandwidths are 820 MHz and the peak gains attains at 7 dBiC.

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Measurement-device-independent quantum communication without encryption

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Science Bulletin 2018年第20期63卷 1345-1350页

作者： Peng-Hao Niu Zeng-Rong Zhou Zai-Sheng Lin Yu-Bo Sheng Liu-Guo Yin Gui-Lu Long state Key Laboratory of Low-dimensional Quantum Physics Beijing 100084.China Department of Physics Tsinghua UniversityBeijing 100084China Collaborative Innovation Center of Quantum Matter Beijing 100084China Beijing Academy of Quantum Information Sciences Beijing 100193China Beijing National Research Center for Information Science and Technology BeUing 100084China School of Information and Technology.Tsinghua University Beijing 100084China lnstiute of Quantum Information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China College of Telecommunications &Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and TelecommunicationsMinistry of EducationNanjing 210003China

Security in communication is vital in modern life. At present, security is realized by an encryption process in cryptography. It is unbelievable if a secure communication is achievable without encryption. In quantum cryptography, there is a unique form of quantum communication, quantum secure direct communication, where secret information is transmitted directly over a quantum channel. Quantum secure direct communication is drastically distinct from our conventional concept of secure communication, because it does not require key distribution, key storage and ciphertext transmission, and eliminates the encryption procedure completely. Hence it avoids in principle all the security loopholes associated with key and ciphertext in traditional secure communications. For practical implementation, defects always exist in real devices and it may downgrade the security. Among the various device imperfections, those with the measurement devices are the most prominent and serious ones. Here we report a measurementdevice-independent quantum secure direct communication protocol using Einstein-Podolsky-Rosen pairs. This protocol eradicates the security vulnerabilities associated with the measurement device,and greatly enhances the practical security of quantum secure direct communication. In addition to the security advantage, this protocol has an extended communication distance, and a high communication capacity.

关键词： Quantum secure direct communication Measurement-device-independent Quantum dialogue Encryption Cryptography

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A 1.8-V 1.8 GHz LC VCO for WSN application

A 1.8-V 1.8 GHz LC VCO for WSN application

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International High Speed Intelligent Communication Forum (HSIC)

作者： Sheng Zhao Zhiqun Li Engineering Research Center of RF-ICs & RF-Systems Southeast University Jiangsu Provincial Key Laboratory of sensor network technology Wuxi

A 1.8 GHz LC VCO in 1.8-V supply is presented. The VCO achieves low power consumption by optimum selection of inductance in the L-C tank. To increase the tuning range, a three-bit switching capacitor array is used for digital switched tuning. Designed in 0.18μm RF CMOS technology, the proposed VCO achieves a phase noise of -126.2dBc/Hz at 1MHz offset and consumes 1.38mA core current at 1.8-V voltage supply.

关键词： Voltage-controlled oscillators Tuning Phase noise Power demand Wireless sensor networks Switches Inductors

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An obstacle avoidance design of UAV based on genetic algorithm 3

An obstacle avoidance design of UAV based on genetic algorit...

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3rd International Conference on Mechanical, Electric and Industrial engineering, MEIE 2020

作者： Hu, Xusheng Liu, Juan Key Laboratory of Unmanned Aerial Vehicle Development Data Application of Anhui Higher Education Institutes Wanjiang University of Technology Ma'anshan243031 China Ma'anshan Engineering Technology Research Center for Wireless Sensor Network and IntelliSense Ma'anshan243031 China Ma'anshan Technical College Ma'anshan243030 China

In order to improve the effect of obstacle avoidance, a PID control algorithm combined with genetic algorithm is proposed. By establishing the mathematical model of UAV, the auxiliary control system of UAV is analyzed, and then the control system is optimized by genetic algorithm. Taking STM32 as the control platform, the obstacle avoidance experiment was carried out by building the experimental platform. The experimental results show that the algorithm can avoid obstacles effectively. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Genetic algorithms

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Sequential 3→1 quantum random access code utilizing unsharp measurements

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Chinese Optics Letters 2021年第11期19卷 133-137页

作者： Zhiguang Pang Jiang Gao Tianlei Hou Min Wei Jian Li Qin Wang Institute of Quantum Information and Technology Nanjing University of Posts and Telecommunications(NUPT)Nanjing 210003China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology of Ministry of Education NUPTNanjing 210003China Telecommunication and Networks National Engineering Research Center NUPTNanjing 210003China

Quantum random access codes(QRACs) are important communication tasks that are usually implemented in prepare-andmeasure scenarios. The receiver tries to retrieve one arbitrarily chosen bit of the original bit-string from the code qubit sent by the sender. In this Letter, we analyze in detail the sequential version of the 3 → 1 QRAC with two receivers. The average successful probability for the strategy of unsharp measurement is derived. The prepare-and-measure strategy within projective measurement is also discussed. It is found that sequential 3 → 1 QRAC with weak measurement cannot be always superior to the one with projective measurement, as the 2 → 1 version can be.

关键词： quantum random access codes unsharp measurement prepare-and-measure scenario

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