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SSRN 2024年

作者： Cai, Zhen Zhang, Fanhang Tan, Yuan Kessler, Stephan Fottner, Johannes Technical University of Munich Materials Handling Material Flow Logistics Garching Germany Technical University of Munich School of Computation Information and Technology Garching Germany Technical University of Munich Process Systems Engineering Freising Germany

Automated guided vehicle (AGV), which was initially designed for indoor operations in industry, has been increasingly applied in outdoor heavy-duty logistics tasks. In typical navigation tasks, such as the autonomous tracking of a designated object or a person, relative angle and relative distance between AGV and the target is required. To obtain the necessary information, various on-board sensors are extensively integrated. In this paper, the reliability of measuring the relative angle with the Angle-of-Arrival (AoA) method with two different Internet of Things (IoT) sensor sets from Texas Instrument (TI) and u-blox, according to Bluetooth 5.1 was investigated. The performance of IoT sensors was validated with angle accuracy parameters and received signal strength indicator (RSSI). The better IoT sensor was then integrated into the AGV navigation system, and the information gathered from IoT sensor enabled the AGV to turn toward the direction of the target. The process of AGV turning to the targeted direction based on IoT sensor information was respectively tested in the simulation and actual environment and evaluated by the disparity between the real relative angle and the rotation angle of the AGV. The results showed that this disparity was within ±5° in both simulated and actual environments, and methods for higher accuracy were proposed. © 2024, The Authors. All rights reserved.

关键词： Internet of things

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Study of Dynamic processes in Nonlinear Discrete systems with Delay Based on Graph Models

Study of Dynamic Processes in Nonlinear Discrete Systems wit...

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2022 International Conference on Industrial Engineering, Applications and Manufacturing, ICIEAM 2022

作者： Ubaydullayeva, Shakhnoza R. Yunusova, Sayyora Barno, Yeshmatova tashkent Inst. of Irrigation and Agricultural Mechanization Engineers National Research University Department 'Automation and Control of Technology Process in Production' Tashkent Uzbekistan Tashkent State Technical University Department Information Processing and Management Systems Tashkent Uzbekistan Tashkent State Technical University Department of Automation and Management of Technological Processes and Production Tashkent Uzbekistan

ISBN: (纸本)9781665483698

In connection with the problems of development and implementation of perfect automatic and automated control systems for complex technological processes based on modern information technology tools, the development of research methods for multidimensional nonlinear discrete control systems is of particular relevance. The variety of these systems is due to the types of modulation, non-linearities, modes of operation of impulse elements, characteristics of continuous parts. The article deals with the problems of modeling and research of one-dimensional and multidimensional pulse-frequency systems with delay based on the use of dynamic graphs. One of the key points in solving the problem is an approach based on the maximum consideration of the physical features of these systems. Given the structural complexity of systems, it is necessary first of all to establish the possibility of decomposing the system into simpler subsystems. Then the study of the system can be reduced to the study of individual subsystems and the nature of their interaction, that is, to the determination of the properties of the system as a whole by the properties of its elements. systems with frequency-pulse modulation are essentially non-linear systems. The topological method based on dynamic graph models allows solving the fundamental difficulties of studying nonlinear discrete systems with delay, allows clearly and strictly formalizing their description, and makes it possible to obtain effective algorithms for analyzing one-dimensional and multidimensional systems of this class. The article presents an example of using the obtained algorithm. © 2022 IEEE.

关键词： Graph theory

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Small Object Detection Algorithm Based on RPANet and Positional Convolution Attention Mechanism 5

Small Object Detection Algorithm Based on RPANet and Positio...

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5th International Conference on Artificial Intelligence and Pattern Recognition, AIPR 2022

作者： Tang, Zongbing Yang, Dan Qu, Junsuo School of Communication and Information Engineering Xi'an University of Posts and Telecommunications China School of Automation Xi'an Key Laboratory of Advanced Control and Intelligent Process Xi'an Robertic Intelligent Systems International Science and Technology Cooperation Base Xi'an University of Posts and Telecommunications Shaanxi Xi'an China

ISBN: (纸本)9781450396899

With the development of deep learning, small object detection has a significant role in application fields such as smart factories and remote sensing images. In order to address the problem of difficult and low accuracy detection of small objects due to small pixel scale and little feature information. In this paper, we present a path aggregation network with residual characteristic RPANet on YOLOv3 algorithm, which can twice use the feature information of the backbone network to enhance the small object feature information, and also offer a positional convolution attention mechanism module PCAM to thoroughly learn and extract the small object feature information as well as reduce the unnecessary feature information in the background, so as to further enhance the detection capability of the model for small objects. The experimental results demonstrate that the improved YOLOv3 algorithm is more effective for small object detection. © 2022 ACM.

关键词： Convolution

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Determination of the Degree of Impact of Natural Disasters on the Level of Migration of the Population by Simulation Modelling 22

Determination of the Degree of Impact of Natural Disasters o...

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22nd International Symposium INFOTEH-JAHORINA, INFOTEH 2023

作者： Lobkov, Konstantin Eremeev, Dmitrij Rubinskaya, Anastasia Melnikova, Elena Panfilov, Ilya Reshetnev Siberian State University of Science and Technology Department of Information Economic Systems Krasnoyarsk Russia Reshetnev Siberian State University of Science and Technology Department of Accounting Finance and Economic Security Krasnoyarsk Russia Reshetnev Siberian State University of Science and Technology Department of Enterprise and Industry Economics Krasnoyarsk Russia Department of Systems Analysis and Operations Research Reshetnev Siberian State University of Science and Technology Krasnoyarsk Russia Institute of Business Process Management Siberian Federal University Krasnoyarsk Russia Digital Material Science: New Materials and Technologie Bauman Moscow State Technical University Krasnoyarsk Russia

ISBN: (纸本)9781665475464

In this article the program for simulation of "PowerSim"was used. It built a simulation-dynamic model to measure the impact of natural disasters on people and migration levels. Three types of natural disasters were considered: hurricane, fire and earthquakes. The necessary constants for the operation of models have been identified, as well as models of the impact of various natural disasters on urban damage have been built. General models have been developed to illustrate the groups of factors influencing the destruction of the housing sector, including the population sector. For the ability to change results, constant switches were added to regulate earthquake severity, fire severity and hurricane strength. A graph has been constructed that can be used to visualize the number of destroyed houses from various natural disasters. The results were analyzed, on the basis of which four graphs were constructed: percentage of population growth, population, population, proportion of built-up land, in addition to graphs: table of calculation and emigration. In the course of the work, it was determined that the model was suitable for calculating the population size taking into account natural disasters. © 2023 IEEE.

关键词： Hurricanes

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Ultrafast growth of high-quality large-sized GaSe crystals by liquid metal promoter

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Nano Research 2022年第5期15卷 4677-4681页

作者： Zuxin Chen Quan Chen Zebing Chai Bin Wei Jun Wang Yanping Liu Yumeng Shi Zhongchang Wang Jingbo Li Institute of semiconductors South China Normal UniversityGuangzhou 510631China School of Materials Sun Yat-Sen UniversityGuangzhou 510275China School of Electrical Engineering and Automation Wuhan UniversityWuhan 430000China School of Physics and Electronics Hunan Key Laboratory for Super-microstructure and Ultrafast ProcessCentral South University932 South Lushan RoadChangsha 410083China Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China International Iberian Nanotechnology Laboratory(INL) 4715–330 BragaPortugal

Growth of high-quality large-sized crystals using the traditional chemical vapor transport(CVT)or vertical Bridgman(VB)technique is costly and time-consuming,limiting its practical industrial ***,we propose an ultrafast crystal growth process with low energy consumption and capability of producing crystals of excellent quality,and demonstrate that large-sized GaSe crystals with a lateral size of 0.5 to 1 cm can be obtained within a short period of 5 min.X-ray diffraction(XRD)and scanning transmission electron microscopy(STEM)studies clearly indicate that the as-grown crystals have a good *** further show the potential application of the resulting GaSe crystals,we fabricate the few-layer GaSe-based photodetector,which exhibits low dark current of 21 pA and fast response of 34 ms under 405 nm *** proposed technique for rapid crystal growth could be further extended to other metallenes with low-melting point,such as Bi-,Sn-,In-,Pb-based crystals,opening up a new avenue in fulfilling diverse potential optoelectronics applications of two-dimensional(2D)crystals.

关键词： GaSe ultrafast growth photodetector liquid metal

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Design and analysis of ultra-large capacity heterogeneous nineteen-core seven-mode fiber

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Optik 2023年 292卷

作者： Shao, Pengshuai Ma, Liling Li, Zenghui Li, Shuguang Cheng, Tonglei Liu, Zhixue State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province School of Science Yanshan University Qinhuangdao066004 China State Key Laboratory of Synthetical Automation for Process Industries College of Information Science and Engineering Northeastern University Shenyang110819 China

The multi-core few-mode fiber based on space division multiplexing technology is one of the critical ways to address the issue that the current single-mode fiber communication capacity has reached its maximum. However, the energy crosstalk between the cores is an important reason for the deterioration of signal quality. Consequently, this paper designs a nineteen-core seven-mode fiber with more transmission channels, and the auxiliary structures such as trench, high and low refractive index double rings, and air holes can effectively reduce intra-core crosstalk and inter-core crosstalk. After optimization, each core of the nineteen-core fiber can transmit seven LP modes, and the effective refractive index difference between adjacent modes is greater than or equal to 10−3. The optical fiber provides 228 transmission channels for the entire transmission system, the inter-core crosstalk of the highest order LP41 mode is lower than −30 dB/100 km at 1550 nm. Based on the above, the proposed optical fiber has excellent optical properties and can be applied to data centers, optical sensors, high-speed computer communication networks, and other applications. © 2023 Elsevier GmbH

关键词： Refractive index

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High-sensitivity Mach–Zehnder interferometer temperature sensor based on a no-core optical fiber with a large lateral offset

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Applied Optics 2025年第16期64卷 4639-4645页

作者： Xinghui Li Huifang Wang Xiaopeng Chen Qi Zhang Xiaoyu Chen Xue Zhou Xin Yan Yong Zhao Tonglei Cheng State Key Laboratory of Synthetical Automation for Process Industries the College of Information Science and Engineering and the National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern University Shenyang 110819 China Foshan Graduate School of Innovation Northeastern University Foshan Guangdong 528311 China Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology Qinhuangdao 066004 China

We designed and experimentally demonstrated an innovative temperature sensor based on Mach–Zehnder interference, which was formed by splicing a piece of no-core fiber (NCF) between two conventional single-mode fibers (SMFs) with a core offset. The intentional misalignment formed a gap that can be filled with ethanol, and temperature sensing was realized using the mode interference between the two distinct optical paths passing through the NCF cladding and the ethanol solution. Although the NCF length barely influenced the sensor sensitivity, it produced a major impact on the free spectral range (FSR) value. As a result, simulations were conducted and an NCF length of 620.7 µm was prepared. The sensor achieved a remarkable temperature sensitivity of 5.3574 nm/°C within the 30–36 °C range. Furthermore, the sensor boasted multiple advantages, including compact structure, high repeatability, and exceptional stability, rendering it a highly effective and versatile tool for precise thermal measurement in cell culture.

关键词： Atomic layer deposition Beam propagation methods Fiber Bragg grating sensors Fiber optic sensors Position sensors Temperature sensors

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Adaptive Pseudo Inverse Control for a Class of Nonlinear Asymmetric and Saturated Nonlinear Hysteretic systems

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IEEE/CAA Journal of Automatica Sinica 2021年第4期8卷 916-928页

作者： Xiuyu Zhang Ruijing Jing Zhiwei Li Zhi Li Xinkai Chen Chun-Yi Su School of Automation Engineering Northeast Electric Power Universityand also with Jilin Province International Research Center of Precision Drive and Intelligent ControlJilin 132012China State Key Laboratory of Synthetical Automation for Process Industries Northeastern UniversityShenyang 110819China Department of Electronic and Information Systems Shibaura Institute of TechnologySaitama 337-8570Japan Department of Mechanical and Industrial Engineering Concordia UniversityQCMontreal H3B 1R6Canada

This paper aims at eliminating the asymmetric and saturated hysteresis nonlinearities by designing hysteresis pseudo inverse compensator and robust adaptive dynamic surface control(DSC)***"pseudo inverse"means that an on-line calculation mechanism of approximate control signal is developed by applying a searching method to the designed temporary control signal where the true control signal is *** main contributions are summarized as:1)to our best knowledge,it is the first time to compensate the asymmetric and saturated hysteresis by using hysteresis pseudo inverse compensator because the construction of the true saturated-type hysteresis inverse model is very difficult;2)by designing the saturated-type hysteresis pseudo inverse compensator,the construction of true explicit hysteresis inverse and the identifications of its corresponding unknown parameters are not required when dealing with the saturated-type hysteresis;3)by combining DSC technique with the tracking error transformed function,the"explosion of complexity"problem in backstepping method is overcome and the prespecified tracking performance is *** of stability and experimental results on the hardware-inloop platform illustrate the effectiveness of the proposed adaptive pseudo inverse control scheme.

关键词： Adaptive dynamic surface control adaptive pseudo inverse control asymmetric and saturated hysteresis robust control

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Distributed online constrained convex optimization with event-triggered communication

arXiv

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arXiv 2023年

作者： Zhang, Kunpeng Yi, Xinlei Li, Yuzhe Cao, Ming Chai, Tianyou Yang, Tao State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang110819 China Laboratory for Information and Decision Systems Massachusetts Institute of Technology CambridgeMA02139 United States Engineering and Technology Institute Groningen University of Groningen GroningenAG 9747 Netherlands

This paper focuses on the distributed online convex optimization problem with time-varying inequality constraints over a network of agents, where each agent collaborates with its neighboring agents to minimize the cumulative network-wide loss over time. To reduce communication overhead between the agents, we propose a distributed event-triggered online primal-dual algorithm over a time-varying directed graph. With several classes of appropriately chose decreasing parameter sequences and non-increasing event-triggered threshold sequences, we establish dynamic network regret and network cumulative constraint violation bounds. Finally, a numerical simulation example is provided to verify the theoretical results. Copyright © 2023, The Authors. All rights reserved.

关键词： Directed graphs

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Distributed Online Convex Optimization with Time-Varying Constraints: Tighter Cumulative Constraint Violation Bounds under Slater's Condition

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IEEE Transactions on Automatic Control 2025年

作者： Yi, Xinlei Li, Xiuxian Yang, Tao Xie, Lihua Hong, Yiguang Chai, Tianyou Johansson, Karl H. National Key Laboratory of Autonomous Intelligent Unmanned Systems Shanghai Institute of Intelligent Science and Technology China Ministry of Education Frontiers Science Center for Intelligent Autonomous Systems China Massachusetts Institute of Technology Lab for Information & Decision Systems CambridgeMA02139 United States Northeastern University State Key Laboratory of Synthetical Automation for Process Industries Shenyang110819 China Nanyang Technological University School of Electrical and Electronic Engineering 50 Nanyang Avenue 639798 Singapore Kth Royal Institute of Technology Division of Decision and Control Systems School of Electrical Engineering and Computer Science Sweden Digital Futures Stockholm10044 Sweden

This paper considers distributed online convex optimization with time-varying constraints. In this setting, a network of agents makes decisions at each round, and then only a portion of the loss function and a coordinate block of the constraint function are privately revealed to each agent. The loss and constraint functions are convex and can vary arbitrarily across rounds. The agents collaborate to minimize static network regret and network cumulative constraint violation. A novel distributed online algorithm with a vanishing stepsize is proposed and it achieves an O(Tmax {c,1-c}) static network regret bound and an O(T1-c/2) network cumulative constraint violation bound, where T is the number of rounds and c∈ (0,1) is a user-defined trade-off parameter. When Slater's condition holds (i.e, there is a point that strictly satisfies the inequality constraints), the network cumulative constraint violation bound is reduced to O(T1-c). Moreover, if the loss functions are strongly convex, then static network regret bound is reduced to O(log (T)), and the network cumulative constraint violation bound is reduced to O(√log (T)T) and O(log (T)) without and with Slater's condition, respectively. To the best of our knowledge, this paper is the first to achieve tighter (network) cumulative constraint violation bounds for (distributed) online convex optimization with time-varying constraints under Slater's condition. Finally, the theoretical results are verified through numerical simulations. © 1963-2012 IEEE.

关键词： Convex optimization

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