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Multilevel Health Monitoring of Autonomous Mining Trucks Under Complex Time-Varying Conditions

IEEE Transactions on Instrumentation and Measurement 2025年 74卷

作者： Zhang, Chaoqi Yu, Guizhen Chen, Peng Zhou, Bin Key Laboratory of Autonomous Transportation Technology for Special Vehicles Ministry of Industry and Information Technology School of Transportation Science and Engineering Beihang University Beijing100191 China

The deployment of autonomous mining trucks (AMTs) has become a major trend in mining operations, driven by the need for enhanced safety and operational efficiency. This study addresses the challenge of monitoring AMT motion status under time-varying and complex working conditions to reduce accident risks. A multilevel health monitoring approach is proposed, incorporating a weighted clustering method to classify working conditions and improve the assessment of key health indicators. The proposed method refines the evaluation of working conditions by applying a targeted clustering approach, which enables more precise health monitoring tailored to each condition category. Experimental validation using data from real-world open-pit mines demonstrates that this approach significantly improves the accuracy and timeliness of fault detection, thereby enhancing overall operational safety and reliability. © 2025 IEEE. All rights reserved.

关键词： Open pit mining

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Amino-functionalized KAUST-7 embedded polymers of intrinsic microporosity membrane with enhanced selectivity for CO2/CH4 separation

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Journal of Membrane science 2025年 729卷

作者： Chen, Ke Guo, Xin Ni, Linhan Qi, Junwen Li, Jiansheng Key Laboratory of New Membrane Materials Ministry of Industry and Information Technology School of Environment and Biological Engineering Nanjing University of Science and Technology Nanjing210094 China

Rational design and construction of fillers and polymers are crucial for the development of high-performance mixed matrix membranes (MMMs). In this work, amino-functionalized metal-organic frameworks KAUST-7 (KAUST-7-NH2) with square-shaped sheet morphology were utilized as fillers to fabricate MMMs by physical blending with the polymer of intrinsic microporosity (PIM-1). The square-shaped KAUST-7-NH2 sheets, prepared via in situ replacement of 2-aminopyrazine into the KAUST-7 framework, exhibited superior separation performance compared to the mono-ligand KAUST-7. Benefiting from the strong CO2 affinity, high porosity and optimal pore sizes of KAUST-7-NH2, the outstanding CO2/CH4 separation performance of the composite membrane was observed. The integration of square-shaped KAUST-7-NH2 sheets provides a 2.5-fold improvement in CO2/CH4 selectivity together with acceptable gas permeability as compared to the original PIM-1 membrane. Furthermore, a 100-h continuous permeation test validated the stability of the fabricated MMMs. Remarkably, the resulting MMM retained 92 % of their initial CO2 permeability after 150 days (drop of only 249 Barrer), indicating that the reduction in CO2 permeability was approximately 10-fold lower than that of the pristine PIM-1 membrane. The prepared MMMs exhibit enhanced CO2/CH4 selectivity and long-term stability, making it a highly promising candidate for practical application. © 2025 Elsevier B.V.

关键词： Microporosity

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Integrated terahertz vortex beam emitter for rotating target detection

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Advanced Photonics 2023年第6期5卷 37-46页

作者： Jingya Xie Jun Qian Tengjiao Wang Linjie Zhou Xiaofei Zang Lin Chen Yiming Zhu Songlin Zhuang University of Shanghai for Science and Technology Terahertz Technology Innovation Research InstituteShanghai Key Laboratory of Modern Optical SystemShanghaiChina Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and NetworksDepartment of Electronic EngineeringShanghaiChina

We propose a terahertz(THz)vortex emitter that utilizes a high-resistance silicon resonator to generate vortex beams with various topological *** the challenge of double circular polarization superposition resulting from the high refractive index contrast,we regulate the transverse spin state through a newly designed second-order grating partially etched on the waveguide’s top *** reflected wave can be received directly by a linearly polarized antenna,simplifying the *** from the tuning feature,a joint detection method involving positive and negative topological charges identifies and detects rotational Doppler effects amid robust micro-Doppler interference *** emitter can be used for the rotational velocity measurement of an on-axis spinning object,achieving an impressive maximum speed error rate of∼2%.This approach holds promise for the future development of THz vortex beam applications in radar target detection and countermeasure systems,given its low cost and potential for mass production.

关键词： vortex beam emitter terahertz rotational Doppler detection

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A Framework for Cyber-Secure Monitoring and Safe Operation of Solar PV Microgrids

A Framework for Cyber-Secure Monitoring and Safe Operation o...

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2024 IEEE Energy Conversion Congress and Exposition, ECCE 2024

作者： Kim, Jaewon Ilic, Marija Xie, Le Massachusetts Institute of Technology Laboratory for Information & Decision Systems CambridgeMA02139 United States Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science CambridgeMA02139 United States Texas A&m University Department of Electrical & Computer Engineering College StationTX77843 United States

ISBN: (纸本)9798350376067

In this paper, we introduce a systematic design of an end-to-end cyber-secure monitoring and safe operation framework for solar photovoltaic (PV)-rich microgrids, by focusing on the use of on-line attack detector for defending against potential cyber-physical attacks and sensor measurement data processing for operational safety. The proposed approach is based on: 1) identifying component models using their input and output measurements;2) dynamic watermarking (DW) methodology for on-line cyber-attack detection and its timing;and 3) an adaptive event-driven safe shutdown procedure after attack detection. It is shown how these three components interactive steps jointly to ensure safe operation under both normal operational scenarios and compromised operational scenarios with some malicious sensors caused by cyber-attacks on solar PV microgrids. Through this on-line integration, the proposed framework dynamically adapts to varying solar irradiance, load demands, operating conditions, and potential cyber-physical attacks. This forms a cyber-physical system which can pro-actively detect and mitigate potential cyber-physical attacks on solar PV microgrids. We describe its proof-of-concept implementation using real-world industrial solar farm data provided by the CenterPoint Energy. This study contributes to enhancing the cyber-security and safe operation of solar PVrich power systems, offering a scalable solution to other types of emerging renewable-rich energy distribution systems. © 2024 IEEE.

关键词： Cyber attacks

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Multi-octave two-color soliton frequency comb in integrated chalcogenide microresonators

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Frontiers of Optoelectronics 2024年第4期17卷 91-104页

作者： Huanjie Cheng Guosheng Lin Di Xia Liyang Luo Siqi Lu Changyuan Yu Bin Zhang Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems School of Electrical and Information TechnologySun Yat-sen UniversityGuangzhou 510275China Photonics Research Center Department of Electronic and Information EngineeringThe Hong Kong Polytechnic UniversityKowloonHong KongChina

Mid-infrared(MIR)Kerr microcombs are of significant interest for portable dual-comb spectroscopy and precision molecular sensing due to strong molecular vibrational absorption in the MIR ***,achieving a compact,octave-spanning MIR Kerr microcomb remains a challenge due to the lack of suitable MIR photonic materials for the core and cladding of integrated devices and appropriate MIR continuous-wave(CW)pump ***,we propose a novel slot concentric dual-ring(SCDR)microresonator based on an integrated chalcogenide glass chip,which offers excellent transmission performance and flexible dispersion engineering in the MIR *** device achieves both phase-matching and group velocity matching in two separated anomalous dispersion regions,enabling phase-locked,two-color solitons in the MIR region with a commercial 2-μm CW laser as the pump ***,the spectral locking of the two-color soliton enhances pump wavelength selectivity,providing precise control over soliton *** leveraging the dispersion characteristics of the SCDR microresonator,we have demonstrated a multi-octave-spanning,two-color soliton microcomb,covering a spectral range from 1156.07 to 5054.95 nm(200 THz)at a-40 dB level,highlighting the versatility and broad applicability of our *** the proposed multi-octave MIR frequency comb is relevant for applications such as dual-comb spectroscopy and trace-gas sensing.

关键词： Mid-infrared Kerr microcombs Two-color soliton Multi-octave Chalcogenide glasses

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Multi-party privacy-preserving decision tree training with a privileged party

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science China(information sciences) 2024年第8期67卷 253-268页

作者： Yiwen TONG Qi FENG Min LUO Debiao HE Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of Education School of Cyber Science and Engineering Wuhan University Shanghai Technology Innovation Centre of Distributed Privacy-Preserving Artificial Intelligence Matrix Elements Technologies Key Laboratory of Computing Power Network and Information Security Ministry of EducationShandong Computer Science Center Qilu University of Technology(Shandong Academy of Sciences)

Currently, a decision tree is the most commonly used data mining algorithm for classification tasks. While a significant number of studies have investigated privacy-preserving decision trees, the methods proposed in these studies often have shortcomings in terms of data privacy breach or efficiency. Additionally,these methods typically only apply to symmetric frameworks, which consist of two or more parties with equal privilege, and are not suitable for asymmetric scenarios where parties have unequal privilege. In this paper,we propose SecureCART, a three-party privacy-preserving decision tree training scheme with a privileged party. We adopt the existing pMPL framework and design novel secure interactive protocols for division,comparison, and asymmetric multiplication. Compared to similar schemes, our division protocol is 93.5–560.4× faster, with the communication overhead reduced by over 90%; further, our multiplication protocol is approximately 1.5× faster, with the communication overhead reduced by around 20%. Our comparison protocol based on function secret sharing maintains good performance when adapted to pMPL. Based on the proposed secure protocols, we implement SecureCART in C++ and analyze its performance using three real-world datasets in both LAN and WAN environments. he experimental results indicate that SecureCART is significantly faster than similar schemes proposed in past studies, and that the loss of accuracy while using SecureCART remains within an acceptable range.

关键词： privacy protection decision trees secure multi-party computation secret sharing privileged party

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Measurement-Based Channel Characterization in a Large Hall Scenario at 300 GHz

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China Communications 2023年第4期20卷 118-131页

作者： Yejian Lyu Zhiqiang Yuan Huaqiang Gao Qiuming Zhu Xiang Zhang Wei Fan Deparment of Electronic Systems Aalborg UniversityAalborgØst 9220Denmark Beijing University of Posts and Telecommunications Beijing 100876China Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space College of Electronic and Information EngineeringNanjing University of Aeronautics and AstronauticsNanjing 211106China China Academy of Information and Telecommunications Technology(CAICT) Beijing 100191China Center for Wireless Communication-Radio Technology(CWC-RT) Oulu UniversityOulu 90570Finland

Sub-terahertz(Sub-THz),defined as the frequency bands in 100-300 GHz,is promising for future generation communications and sensing *** channel measurement and modeling are essential for development and performance evaluation of the future communication *** channel modeling relies on realistic channel data,which should be collected by high-fidelity channel *** paper presents the measurement-based channel characterization in a large indoor scenario at 299-301 *** firstly review the state-of-the-art channel measurements at sub-THz frequency *** then presented a VNA-based channel sounder for long-range measurements,which uses the radio-overfiber *** measurements using this channel sounder are conducted in a large hall *** on the measurement data,we calculated and analyzed key propagation channel parameters,e.g.,path loss,delay spread,and angular *** results are also analyzed both in the line-of-sight(Lo S)and noneLo S(NLo S)*** large delay components in the measurements demonstrate the possibility of the longrange channel measurement campaign at 300 GHz.

关键词： channel measurement sub-terahertz 300 GHz channel characterization

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Modeling of quad ring resonator for tunable delay line in z-domain analysis 12

Modeling of quad ring resonator for tunable delay line in z-...

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Next-Generation Optical Communication: Components, Sub-systems, and systems XII 2023

作者： Nadeem, Md Danish Raghuwanshi, Sanjeev Kumar Kumar, Ritesh Kumar, Santosh Jharkhand Dhanbad826004 India Shri Phaneshwar Nath Renu Engineering College Bihar Arariya854318 India Shandong Key Laboratory of Optical Communication Science and Technology School of Physics Science and Information Technology Liaocheng University Liaocheng252059 China

ISBN: (纸本)9781510659636

By employing a delay line signal processing technique, a mathematical model of an asymmetrical quad microring resonator (QMRR) can be calculated. Four asymmetrical rings are coupled with each other in vertically connected structures of QMRRs are designed. The performance of QMRR structures is demonstrated using two different types of waveguide bus, namely crossing and parallel waveguides. In the MATLAB environment, the frequency spectrum response and accompanying transmittance, phase, and group delay plots are programmed and graphically presented. © 2023 SPIE.

关键词： MATLAB

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Design and analysis of photonic beam forming system using ring resonator for 1×4 phase array antenna in Ka-Band 12

Design and analysis of photonic beam forming system using ri...

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Next-Generation Optical Communication: Components, Sub-systems, and systems XII 2023

ISBN: (纸本)9781510659636

In the next fifth-generation (5G) and sixth-generation (6G) wireless cellular networks, the millimeter-wave band presents new possibilities for extremely strong data transfer speeds and extensive network connectivity. Millimeter waves, on the other hand, suffer from a large loss of propagation, which is the most severe obstacle. Utilizing beamforming with several antennas is a helpful solution to this problem, which may be overcome. In this article, a concept for an integrated photonic beamforming system is presented using ring resonator for 1×4 phase array antenna in Ka-Band. Signal operating at 28GHz is based on waveguide technology. The micro-ring resonator is utilized so that the actual time delay line can be achieved. The mathematical analysis and design of the beam forming structure are presented after that It was possible to produce a group delay of 250 ps, 500 ps, 750 ps, and 1000 ps delay of the proposed different cascaded architecture of ring resonator as a delay element which corresponds to a beam directing angle of 30°, 90°, 11.5°, 8.62° degrees respectively. © 2023 SPIE.

关键词： Beamforming

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The Power of Age-based Reward in Fresh information Acquisition 42

The Power of Age-based Reward in Fresh Information Acquisiti...

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42nd IEEE International Conference on Computer Communications, INFOCOM 2023

作者： Wang, Zhiyuan Meng, Qingkai Zhang, Shan Luo, Hongbin Beihang University School of Computer Science and Engineering Beijing China Beihang University State Key Laboratory of Virtual Reality Technology and Systems China Beihang University Institute of Artificial Intelligence Beijing China State Key Laboratory of Software Development Environment China

ISBN: (纸本)9798350334142

Many Internet platforms collect fresh information of various points of interest (PoIs) relying on users who happen to be nearby the PoIs. The platform will offer reward to incentivize users and compensate their costs incurred from information acquisition. In practice, the user cost (and its distribution) is hidden to the platform, thus it is challenging to determine the optimal reward. In this paper, we investigate how the platform dynamically rewards the users, aiming to jointly reduce the age of information (AoI) and the operational expenditure (OpEx). Due to the hidden cost distribution, this is an online non-convex learning problem with partial feedback. To overcome the challenge, we first design an age-based rewarding scheme, which decouples the OpEx from the unknown cost distribution and enables the platform to accurately control its OpEx. We then take advantage of the age-based rewarding scheme and propose an exponentially discretizing and learning (EDAL) policy for platform operation. We prove that the EDAL policy performs asymptotically as well as the optimal decision (derived based on the cost distribution). Simulation results show that the age-based rewarding scheme protects the platform's OpEx from the influence of the user characteristics, and verify the asymptotic optimality of the EDAL policy. © 2023 IEEE.

关键词： Simulation platform

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