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UPB Scientific Bulletin, Series C: Electrical engineering and Computer science 2024年第3期86卷 171-182页

作者： He, Jingjie Zhang, Wenjing Xu, Feng Artificial Intelligence Research Institute Beijing Institute of Petrochemical Technology 102600 China School of Information and Communication Engineering University of Electronic Science and Technology of China Chengdu611731 China

By acquiring the posture information of the rigid body with markers on the gripper frame, the camera motion on the robot flange can be controlled remotely. The essential step of posture alignment in teleoperation is to calibrate the transformation matrix of the robot base coordinate system and the world coordinate system of the optical tracking system. In this paper, a novel Posture Alignment Method Based on the Customized Rigid Body with Markers (PAMC) was proposed, which was an automatic, accurate and quick method to complete the posture alignment for related coordinate systems without non-systematic errors. PAMC was applied to teleoperation for the camera robot based on the customized rigid body with markers and optical tracking system. The comparative experiments prove that PAMC is better than manual method, with more stable, more flexible physical setting for reference coordinate system, and shorter operation time-consuming. Meanwhile, PAMC is more suitable for camera robot teleoperation than the existed automatic method due to arbitrary calibration posture and collision avoidance. © 2024, Politechnica university of Bucharest. All rights reserved.

关键词： Systematic errors

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Junction matters in hydraulic circuit bio-design of microfluidics

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Bio-Design and Manufacturing 2023年第1期6卷 38-50页

作者： Yao Lin Dongliang He Zerui Wu Yurou Yao Zhanhao Zhang Yuheng Qiu Shan Wei Guangzhu Shang Xingyue Lei Ping Wu Weiping Ding Liqun He Department of Thermal Science and Energy Engineering University of Science and Technology of ChinaHefei 230027China School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230027China GeneMind Biosciences Company Limited Shenzhen 518023China Department of Electronic Engineering and Information Science University of Science and Technology of ChinaHefei 230027China

Microfluidic channels are at micrometer scales;thus,their fluid flows are laminar,resulting in the linear dependence of pressure drop on flow rate in the length of the *** ratio of the pressure drop to flow rate,referred to as resistance,depends on channel size and dynamic ***,a microfluidic chip is analogous to an electric circuit in design,but the design is adjusted to optimize channel ***,whereas voltage loss is negligible at the nodes of an electric circuit,hydraulic pressure drops at the nodes of microfluidic chips by a magnitude are comparable to the pressure drops in the straight ***,we prove by experiment that one must fully consider the pressure drops at nodes so as to accurately design a precise microfluidic *** the process,we numerically calculated the pressure drops at hydraulic nodes and list their resistances in the range of flows as *** resorted to machine learning to fit the calculated results for complex ***,we obtained a library of node resistances for common junctions and used them to design three established chips that work for single-cell analysis and for precision allocation of solutes(in gradient and averaging concentration microfluidic networks).Endothelial cells were stimulated by generating concentrations of adriamycin hydrochloride from the last two microfluidic networks,and we analyzed the response of endothelial *** results indicate that consideration of junction resistances in design calculation brings experimental results closer to the design values than *** approach may therefore contribute to providing a platform for the precise design of organ chips.

关键词： Junctions Hydraulics Microfluidic chip design

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Design of Patterned Transcendental Metamaterial Cover Structures for Crosstalk Reduction in FBAR Parallel Feed Lines

Design of Patterned Transcendental Metamaterial Cover Struct...

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2024 Photonics and Electromagnetics Research Symposium, PIERS 2024

作者： Chu, Tongchuan Cao, Xin Zhou, Longjian Cai, Qiangming Zhu, Yuyu Southwest University of Science and Technology School of Information Engineering Mianyang621010 China South China University of Technology School of Electronic and Information Engineering Guangzhou510640 China

ISBN: (纸本)9798350375909

With the rapid development of modern high-speed circuit technology, electronic devices have the properties of high data transmission rates, steeper edge changing rates, and large-scale integration which can lead to increased crosstalk challenges in high-speed planar circuit designs. Severe crosstalk problems can result in disrupted data transmission and increase bit error rates (BER). Therefore, in order to reduce crosstalk problems and increase signal transmission quality, this paper studies the far-end crosstalk (FEXT) suppression of film bulk acoustic resonator (FBAR) parallel feed lines in high-speed data rate transmission. First, the theory of FBAR crosstalk is analyzed, and the influential factors such as line spacing, trace coupling length on crosstalk in FBAR feedlines are analyzed from the perspectives of frequency domain and time domain. Then, several structures based on geometric fractal substrate covers are proposed. The proposed structures utilize modern mathematical transcendental planar geometry such as modified Hilbert fractal, Minkowski fractal and von Koch fractal metamaterial covers. By adding these structures, the distributed capacitance of the line is increased to neutralize the magnetic coupling between the lines, thus reducing the FEXT both in frequency and time domains. The optimization is both performed through full-wave simulation and circuit simulation. As the results show that, in the frequency domain, the FEXT can be maximumly reduced about 26 dB from 0.1 GHz to 16 GHz. For signal transmitting verification, the lines are fed with DDR5 (the fifth-generation double data rate) signals, and the FEXT can be reduced over 21 mV, which corresponds to over 95% of the FEXT reduction in the time domain. The proposed structure can be applied in modern high speed planar circuits and wireless communication systems. © 2024 IEEE.

关键词： Frequency domain analysis

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A Low-profile Wideband Dual-polarized Antenna with Coupled Feed Structure for 5G Base Station Application

A Low-profile Wideband Dual-polarized Antenna with Coupled F...

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2024 Photonics and Electromagnetics Research Symposium, PIERS 2024

作者： Chen, Cong Cao, Xin Zhou, Longjian Cai, Qiangming Wan, Jia Zhu, Yuyu Southwest University of Science and Technology School of Information Engineering Mianyang621010 China South China University of Technology School of Electronic and Information Engineering Guangzhou510640 China

ISBN: (纸本)9798350375909

A low-profile dual-polarized dipole antenna is presented with a specially designed coupled feed structure, featuring a stable radiation pattern tailored for use in 5G base stations. The antenna is constructed with a pair of intersecting dipoles, a feeding mechanism that interfaces with them, an intermediary layer for coupling, and a metallic backing that serves as a reflector. The feeding method of the crossed-dipoles radiator is not in direct contact with the balun feeding structure, but in direct contact with the coupled feed structure on the back of the substrate. Such a feeding method brings about the effect of low profile. The proposed antenna is capable of operating across the frequency ranges of 2.99 GHz to 3.91 GHz, with a reflection coefficient below -15 dB within this spectrum, and it exhibits an average isolation exceeding 33 dB. It has a stable gain of 9.3 ± 1.2 dBi and half-power beamwidth (HPBW) of 57 ± 5.2° within the operational bandwidth, the suggested antenna stands at a mere 0.114λ0 in height, a significant reduction compared to the conventional 0.25λ0, where λ0 represents the free wavelength corresponding to the center frequency. The cross-polarization discrimination (XPD) of the antenna exceeds 20 dB in the boresight direction and surpasses 10 dB within the ±60° range in the horizontal plane. Therefore, this antenna exhibits substantial potential for integration within 5G communication systems, showcasing promising applications in the field. © 2024 IEEE.

关键词： Dipole antennas

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Thermochromic Smart Windows with Ultra-High Solar Modulation and Ultra-Fast Responsive Speed Based on Solid–Liquid Switchable Hydrogels

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Research 2024年第4期2024卷 2-13页

作者： Guangjun Zhu Gang Xu Yu Zhang Guo Lu Xuan Cai Wei Zhang Wei She Changwen Miao State Key Laboratory of High Performance Civil Engineering Materials Southeast UniversityNanjing 211189China School of Materials Science and Engineering Southeast UniversityNanjing 211189China Jiangsu Key Laboratory of Advanced Metallic Materials Southeast UniversityNanjing 211189China School of Civil Engineering and Architecture Shandong University of Science and TechnologyQingdao 266590China Wuhan National Laboratory for Optoelectronics School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China

Thermo-responsive hydrogels can dynamically modulate incident light,providing a broad prospect for development of smart windows,which are of pivotal importance for energy conservation in ***,these hydrogels normally exhibit slow response speed and tend to contract over extended phase transition,compromising structural integrity of smart *** this study,a solid–liquid switchable thermochromic hydrogel,denoted as SL-PNIPAm,was synthesized by cross-linking PNIPAm with AMEO through dynamic imine *** to its distinctive solid–liquid transformation characteristics,SL-PNIPAm demonstrates rapid response time(within 5 s)and retains structural integrity without undergoing shrinkage during heating/cooling and freezing/thawing cycles.

关键词： bonds linking freezing

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Probe Machine Based Computing Model for Maximum Clique Problem

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Chinese Journal of electronics 2022年第2期31卷 304-312页

作者： CUI Jianzhong YIN Zhixiang TANG Zhen YANG Jing Department of Computer Huainan Union University School of Electronic and Information Engineering Anhui University of Science & Technology School of Mathematics Physics and Statistics Shanghai University of Engineering Science School of Mathematics and Big Data Anhui University of Science & Technology

Probe machine(PM) is a recently reported mathematic model with massive parallelism. Herein,we presented searching the maximum clique of an undirected graph with six vertices. We constructed data library containing n sublibraries, each sublibrary corresponded to a vertex in the given graph. Then, probe library according to the induced subgraph was designed in order to search and generate all maximal cliques. Subsequently,we performed probe operation, and all maximal cliques were generated in parallel. The advantages of the proposed model lie in two aspects. On one hand, solution to NP-complete problem is generated in just one step of probe operation rather than found in vast solution *** the other hand, the proposed model is highly *** work demonstrates that PM is superior to TM in terms of searching capacity when tackling NP-complete problem.

关键词： maximal cliques maximum clique problem searching capacity data library NP-complete problem computational complexity model lie induced subgraph probe operation undirected graph mathematic model graph theory parallel algorithms optimisation parallelism computing model vertex probe library probe machine

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Ammonia detection system based on spectral absorption

Ammonia detection system based on spectral absorption

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7th International Conference on electronics technology, ICET 2024

作者： Xue, Xu Jiang, Yang Wang, Mohan Fang, Xiaomeng Huang, Mengqiang Liu, Xiang Nanjing University of Information Science & Technology School of Electronic & Information Engineering NanJing China

ISBN: (纸本)9798350363951

Based on TDLAS spectral absorption technology, this system selects the absorption peak near the center wavelength of 1.512 μ m in the near-infrared band as the absorption spectrum of ammonia gas, according to the characteristics of near-infrared gas fingerprint peaks. The self-developed gas detection system is composed of modules such as DFB driver board, DFB laser, long optical path cell, spectroscope, light attenuator, MEMS detector, and data processing unit, as well as the operating system algorithm model at the terminal. Combining with artificial intelligence algorithm models, it stably and accurately identifies and detects various gases, and effectively eliminates interference from gases with similar absorption bands. This system innovatively adopts laser spectroscopy for trace gas detection technology, achieving detection of ammonia NH3 and other gases. At the same time, this system uses spectral data to convert it into an intensity map, and adds artificial intelligence algorithm models for concentration prediction and classification recognition. © 2024 IEEE.

关键词： Ammonia

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Joint Uplink and Downlink Robust Transmission for Cell-Free Networks

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IEEE Transactions on Wireless Communications 2024年第10期23卷 15308-15321页

作者： Zhang, Guangyang Lu, Yang Li, Mingchun Zhong, Zhangdui Quek, Tony Q. S. Beijing Jiaotong University School of Electronic and Information Engineering Beijing100044 China Beijing Jiaotong University School of Computer Science and Technology Beijing100044 China Beijing Jiaotong University School of Electronic and Information Engineering Key Laboratory of Railway Industry of Broadband Mobile Information Communications Beijing100044 China Singapore University of Technology and Design Tampines487372 Singapore Yonsei University Seoul03722 Korea Republic of

This paper investigates the joint uplink (UL) and downlink (DL) robust transmission design for cell-free networks. The total data amount of the UL and DL transmissions is maximized in the presence of the statistical channel state information error by optimizing the UL digital combiners, UL transmission power, DL transmit beamforming vectors and UL/DL time allocation subject to the tolerable UL/DL outage probability constraints, the UL/DL minimum data amount requirements and the UL/DL power budgets. To tackle the variables coupling in outage probability constraints, the property of perspective function and the quadratic transform are applied. Then, the Bernstein-type inequality is used to derive the computationally tractable forms of the outage probability constraints. The considered problem is further decomposed into four subproblems and solved by the proposed alternating optimization (AO)-based algorithm. Numerical results show the proposed algorithm outperforms three existing AO-based baselines in terms of convergence speed and optimality performance. The impacts of the UL transmission power and tolerable outage probability on the UL/DL transmission and time allocation are revealed. Moreover, the effective APs for each user are defined and illustrated to show the coordination among the APs. © 2024 IEEE.

关键词： Channel state information

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Rollover Prevention Control of Heavy Vehicles Based on Control Barrier Functions 8

Rollover Prevention Control of Heavy Vehicles Based on Contr...

引用

8th CAA International Conference on Vehicular Control and Intelligence, CVCI 2024

作者： Cao, Kecai Pan, Yongping Gu, Juping School of Electronic Information Engineering Suzhou University of Science and Technology Suzhou China School of Electrical and Electronic Engineering Nanyang Technological University 639798 Singapore

ISBN: (纸本)9798331504892

Rollover prevention control for heavy vehicles with three degree of freedom has been firstly investigated within the framework of control barrier functions (CBF) in this paper. Through solving optimization of Quadratic Program (QP), unsafe controllers are minimally revised to construct rollover prevention controllers which are friendly implemented in real application without design from scratch. Under the rollover prevention controller obtained, lateral load transfer of heavy vehicles are constrained in some desired safe interval where rollover accidents can be successfully avoided. Numerical examples are also presented to illustrate the effectiveness of rollover prevention controllers proposed upon CBFs. © 2024 IEEE.

关键词： Quadratic programming

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Automatic Positioning of Intelligent Mobile Robot Based on Improved Front-End Scanning Matching

Journal of Network Intelligence

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Journal of Network Intelligence 2025年第1期10卷 559-572页

作者： Wang, Hong Wang, Yi-Gui Zhang, Jie Department of Computer and Software Engineering Shandong College of Electronic Technology Jinan250200 China School of Computer Science and Technology Shandong Jianzhu University Jinan250101 China College of Agricultural Science and Technology Yana Royal Polytechnic University Chiang Mai50000 Thailand

Traditional autonomous navigation methods for mobile robots mainly rely on geometric feature-based LiDAR scan-matching algorithms, but in complex environments, this method is often affected due to the presence of moving objects, occlusions, and other interfering factors, resulting in a decrease in positioning accuracy. With the growing demand for robotics applications in logistics, security, exploration and other fields, the need for robust autonomous navigation and high-precision mapping in highly dynamic and complex environments is becoming more and more urgent. To solve this problem, an improved front-end scan matching algorithm based on Frequency Modulated Continuous Wave (FMCW) LiDAR is proposed in this paper. Firstly, by using the target Doppler velocity information provided by the FMCW LiDAR, we design a novel point cloud segmentation algorithm based on velocity clustering, which is able to effectively distinguish between stationary and moving objects, and avoid the dynamic interference affecting the position estimation. Secondly, we introduce the Gaussian Mixture Model Sampling Consistency (GMMSC) algorithm, which is more robust to reject the mis-matched pairs in the scanning matching process and improve the alignment accuracy. Finally, based on the residual high-quality matched pairs, we combine the classical ICP algorithm with the robust kernel function to further enhance the stability of the position estimation in the case of occlusion and local mismatch. The experimental results show that the proposed improved algorithm significantly improves the mapping capability of mobile robots in complex environments compared with the existing techniques. The average relative error of the improved front-end scanning matching algorithm is reduced by 40.6 % compared with the pre-improved one. © 2025, Taiwan Ubiquitous information CO LTD. All rights reserved.

关键词： Mobile robots

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