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13th International Conference on Intelligent control and Information Processing, ICICIP 2025

作者： Chu, Qinghao Wang, Zhelong Jiang, Yu Hou, Pengrong Zhang, Pinliang School of Control Science and Engineering Dalian University of Technology Dalian China State Key Laboratory of Astronautic Dynamics Xi’an Satellite Control Center Xi’an China Beijing Institute of Spacecraft Environment Engineering China Academy of Space Technology Beijing China

ISBN: (纸本)9798331516147

To address the increasing computational demands and the need for enhanced stability in the orbit prediction of large-scale resident space objects (RSOs), this paper proposes a novel method grounded in orbital dynamics, which defines and computes environmental, dynamical, and fingerprint features. A feature fusion strategy is then applied to introduce a Multi-OP model comprising a shared backbone and a prediction layer tailored for orbit prediction tasks. Specifically, the shared backbone integrates environmental and dynamical features to capture public information, thereby enhancing the model’s generalization ability. The prediction layer, in contrast, leverages fingerprint features to generate individualized orbit predictions for each RSO. Experimental results demonstrate that the Multi-OP model not only enhances the accuracy of orbit prediction but also exhibits remarkable stability. © 2025 IEEE.

关键词： Prediction models

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Chemical bond parameters and microwave dielectric properties of CaLaAl3O7 ceramics with layer structure

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Ceramics International 2025年第15期51卷 20798-20804页

作者： Yang, Hongcheng Huang, Xier Zheng, Yixuan Zhang, Jin Li, Enzhu School of New Energy and Materials Southwest Petroleum University Chengdu610500 China National Engineering Research Center of Electromagnetic Radiation Control Materials and Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of Education University of Electronic Science and Technology of China Chengdu610054 China

Sintered at 1575 °C, the single phase CaLaAl3O7 ceramics were obtained and investigated on the sensitivity of chemical bond to the stability of layer structure. LaAlO3 and CaAl2O4 are the secondary phases in the sintering temperature range of 1350∼1550 °C, contributing to the variation of relative density, dielectric constant and quality factors. As a candidate of microwave dielectric ceramics of aluminate, pure CaLaAl3O7 possesses the microwave dielectric properties of ɛr = 6.26, Q × f = 22750 GHz, τf = −39.8 ppm/°C. Based on the calculation of chemical bond traits and cation polarization, modification of Ca/La site may have primary influence on ɛr. Al(1)-O and Al(2)-O bonds make mainly contribution on lattice energy and bond energy, indicating [AlO4] frame paly crucial role on crystal structure stability. It is prior to design substitution for Al to adjust the layer structure and optimize the dielectric loss for CaLaAl3O7 ceramics. The systematical results of this study establish that determination of contributions of chemical bond to structure stability is a key dial for tuning crystal structure and properties in ternary aluminate solids. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Aluminum oxide

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Robust Adaptive Sliding Mode Security control of Markov Jump Cyber-Physical Systems With Stochastic Injection Attacks Through Event-Triggered-Based Observer Approach

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IEEE Transactions on Systems, Man, and Cybernetics: Systems 2025年第5期55卷 3679-3692页

作者： Jiang, Baoping Niu, Fuzhou Wu, Zhengtian Qiu, Jianbin Suzhou University of Science and Technology School of Electronic and Information Engineering Suzhou215009 China Politecnico di Milano Department of Mechanical Engineering Milan20156 Italy Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin150001 China

This article addresses the challenge of state observer design for sliding mode security control in Markov jump cyber-physical systems subjected to stochastic injection attacks. To enhance network efficiency, a dynamic event-triggered algorithm is introduced in the communication channel. First, the design begins with a Luenberger state observer featuring an adaptive compensator. This configuration aims to effectively counteract malicious attacks. Second, an integral sliding hyperplane is formulated within the estimation space, which serves as the foundation for deriving the sliding mode dynamics, ensuring robustness against disturbances. Recognizing the diversity of transition rates (TRs), an elastic sliding mode controller is designed to accommodate three distinct types of TRs, which is also strategically designed to guarantee reachability and maintain sliding motion. Third, stochastic stability with an H∞ attenuation level is conducted separately for each type of TR. Correspondingly, the development of an algorithm for determining threshold parameters in triggered conditions is presented. Simultaneously, a proof of the nonexistence of Zeno behavior is provided, ensuring the stability and efficiency of the proposed system. Finally, a simulation study using a practical model is included to empirically demonstrate the validity of the proposed method in a real-world context. © 2013 IEEE.

关键词： Stochastic systems

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Inhibition of jarosite heterogeneous crystallization on anglesite via in-situ formation of competitive substrate

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Journal of Environmental sciences 2025年第3期149卷 394-405页

作者： Jiahui Wu Xu Yan Feiping Zhao Yong Ke Haiying Wang Wenchao Zhang Qingwei Wang Meiqing Shi Liyuan Chai School of Metallurgy and Environment Central South UniversityChangsha 410083China Chinese National Engineering Research Center for Control&Treatment of Heavy Metal Pollution Changsha 410083China State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals Changsha 410083China

Heterogeneous crystallization is a common occurrence during the formation of *** leads to the encapsulation of valuable/hazardous metals within the primary phase,presenting significant challenges for waste treatment andmetal ***,we proposed a novel method involving the in-situ formation of a competitive substrate during the precipitation of jarosite waste,which is an essential process for removing iron in zinc *** observed that the in-situ-formed competitive substrate effectively inhibits the heterogeneous crystallization of jarosite on the surface of anglesite,a lead-rich phase present in the *** a result,the iron content on the anglesite surface decreases from34.8%to 1.65%.The competitive substrate was identified as schwertmannite,characterized by its loose structure and large surface ***,we have elucidated a novel mechanism underlying this inhibition of heterogeneous crystallization,which involves the local supersaturation of jarosite caused by the release of ferric and sulfate ions from the competitive *** local supersaturation promotes the preferential heterogeneous crystallization of jarosite on the competitive ***,during the formation of jarosite,the competitive substrate gradually vanished through a dissolution-recrystallization process following the Ostwald rule,where a metastable phase slowly transitions to a stable *** effectively precluded the introduction of impurities and reduced waste *** goal of this study is to provide fresh insights into the mechanism of heterogeneous crystallization control,and to offer practical crystallization strategies conducive to metal separation and recovery from solid waste in industries.

关键词： Heterogeneous crystallization Jarosite waste Competitive substrate Zinc hydrometallurgy

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Maximising the Discounted Accumulated Income in the Model with Two Gas Fields 15th

Maximising the Discounted Accumulated Income in the Model...

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15th International Conference on Optimization and Applications, OPTIMA 2024

作者： Skiba, Alexander K. Federal Research Center "Computer Science and Control" Russian Academy of Sciences Vavilov st. 44 block 2 Moscow119333 Russia

ISBN: (纸本)9783031791185

We construct a continuous, aggregated, and dynamic model for the exploitation of gas fields. The model takes into account the depth of deposit occurrence. As a control element, the model makes use of the drilling speed at each field. In the model, we assume that the changes in the average flow rate of producing wells and current natural gas production are proportional. We formulate the problem of maximising discounted accumulated income for two gas fields. We study the optimal control problem with a free right end and a fixed time. To solve the problem, we use Pontryagin’s maximum principle. We thoroughly investigate the special mode of optimal control. We identify the key aspects of this management. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Gas industry

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Influence of Malicious Agents in a Team Seeking to Contain an Evader

Influence of Malicious Agents in a Team Seeking to Contain a...

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AIAA science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Mora, Braulio Chakravarthy, Animesh Von Moll, Alexander Weintraub, Isaac Casbeer, David W. Mechanical and Aerospace Engineering Department The University of Texas at Arlington ArlingtonTX United States Control Science Center Air Force Research Laboratory Wright-Patterson AFB OH United States

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

This paper explores a multi-agent containment problem, where a fast evader, modeled having constant speed and using constant heading, attempts to escape a circular containment region that is orbited by a slower team of pursuers with a nonzero capture radius. Two distinct multi-agent dynamic models cases are explored, the first uses a unicycle dynamics model with strict constraints, while the second uses a double integrator model with looser constraints and consensus laws implemented with a communication network. This paper considers the scenario wherein some of the pursuers get compromised and turn into malicious agents that suffer a delay in initiating the capture pursuit. A boost countermeasure is proposed and its effectiveness is investigated. This work provides a foundation for a consensus case that incorporates more restrictions in motion and extensions to larger teams of pursuers, as well as a more dynamic evader model. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Orbits

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Porphyrin-based Covalent Organic Polymers with Bimetallic Active Sites for Boosting Photocatalytic CO_(2) Cycloaddition

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Chemical research in Chinese Universities 2025年第1期41卷 121-130页

作者： YAN Shengrong ZHANG Lan SHI Songhu REN Yanyan LIU Wenhao LI Yujie DUAN Fang LU Shuanglong DU Mingliang CHEN Mingqing Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi214122P.R.China School of Environmental and Biological Engineering Nantong College of Science and TechnologyNantong226007P.R.China Jiangsu Engineering Research Center of Environmental Functional Materials and Pollution Control Nantong226007P.R.China

The photocatalytic CO_(2) cycloaddition to prepare high value-added chemicals,such as cyclic carbonates(CCs)under mild conditions is an effective strategy to realize carbon ***,through a three-step reaction,the porphyrin-based covalent organic polymer with bimetallic active sites(Fe-COP-Zr)is successfully obtained by coordinating Fe^(2+) and Zr^(4+)with porphyrin and bipyridine(Bpy),*** to excellent photosensitivity of porphyrin moieties,Fe-COP-Zr exhibits outstanding visible light absorption,which is very important for the production of photogenerated ***,Fe-COP-Zr shows high photocatalytic performance towards CO_(2) cycloaddition with a yield of 12.1 mmol/h,which is 6 times higher than that of pure covalent organic polymer(COP)and 3 times higher than that of monometallic *** reason for this excellent photocatalytic CO_(2) cycloaddition performance may be ascribed to the synergistic effect of Fe and Zr *** photogenerated electrons are easily injected into epichlorohydrin(ECH)through Fe—O bonds to form affluent electron transition state,and interact with Zr^(4+) as Lewis acid sites for the ring-opening of ECH,which is the rate-determining step for the visible light boosted chemical fixation of CO_(2) into *** work might provide some insights for design and preparation of COPs with multiple active sites to modulate their photocatalytic activities.

关键词： Photocatalytic CO_(2)cycloaddition Cyclic carbonate Covalent organic polymer Bimetallic active site

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Broadband low-frequency sound absorption of multifunctional composite metastructure

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science China(Technological sciences) 2025年第2期68卷 114-124页

作者： Yilong YANG Shanshan LIU Yan LI Tong GAO Yongdong PAN Yong LI Yabin JIN School of Aerospace Engineering and Applied Mechanics Tongji UniversityShanghai 200092China State International Joint Research Center of Aerospace Design and Additive Manufacturing Northwestern Polytechnical UniversityXi’an 710072China Institute of Acoustics School of Physics Science and EngineeringTongji UniversityShanghai 200092China Shanghai Key Laboratory of Intelligent Sensing and Detection Technology School of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Institute of Aircraft Mechanics and Control Shanghai 200092China

In this study,we fabricated multifunctional metastructures from carbon fiber-reinforced plastic composites using additive manufacturing *** metastructures are characterized by their lightweight,load-bearing capacity,and broadband low-frequency sound absorption *** metastructure consists of 36 unit cells,and non-local coupling mechanism was considered for designing the sound absorption *** developed an acoustic impedance theory tailored for the metastructure,facilitating an analysis of thermal and viscous dissipation *** is proven theoretically and experimentally that the proposed composite metastructure can achieve a noise reduction with an average sound absorption coefficient greater than 0.9 across frequencies in the rage of 330-1500 *** also studied the metastructure’s quasi-static and cyclic compression performance,confirming its efficient absorption capabilities after cyclic *** proposed design and additive manufacturing method for composite metastructures provides a novel pathway for creating lightweight,multifunctional structures with diverse applications,such as aerospace engineering.

关键词： composite metastructure broadband sound absorption additive manufacturing

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Cadmium accumulation and translocation in maize cultivars on contaminated soils in southern China

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BMC Plant Biology 2025年第1期25卷 1-14页

作者： Shan, Xiangyu Dou, Fei Li, Dawei Yuan, Yuzhen Zhang, Yingyun Liu, Chuanping Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management Institute of Eco-Environmental and Soil Sciences National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangdong Academy of Sciences Guangzhou 510650 China

Rapid industrialization in China has led to widespread soil contamination, particularly with heavy metals like cadmium (Cd). This study investigates Cd accumulation and translocation in 12 commercial maize cultivars grown on contaminated soils. Initial soil Cd concentrations averaged 0.68 mg kg⁻¹, exceeding safe limits for agricultural soils. Post-harvest results indicated that the soil Cd concentration decreased under all cultivars, with values ranging from 0.25 to 0.55 mg kg⁻¹, indicating effective Cd uptake by maize. The bio-concentration factor (BCF) values indicated Cd accumulation, varying between 0.016 and 0.051, while translocation factor (TF) values ranged from 0.04 to 0.12. Cultivar C868 (pollution index (Pi) = 0.048, BCF = 0.016 and TF = 0.05) and C380 (Pi = 0.071, BCF = 0.023 and TF = 0.09) were the best cultivars on contaminated soils, which demonstrated reduced Cd uptake and limited translocation to grains. In addition, a strong positive correlation (r = 0.72, p < 0.05) was observed between soil Cd, Pi, BCF and TF, indicating that cultivars grown on high Pi soils, with higher Cd uptake and translocation result in higher accumulation of Cd in grains. The combined VNIR-PLSR model showed strong predictive performance for the prediction of Cd (R² = 0.67 and RPD = 2.4). Spectral analysis revealed significant increases of reflectance at 450–500 and 600–700 nm associated with Cd absorption. Our findings indicated the capability of VNIR spectroscopy coupled with PLSR method as a reliable and efficient method for soil Cd assessment. © The Author(s) 2025.

关键词： Cd Maize PLSR Pollution index Spectroscopy Translocation factor

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Data-Driven Method for Predicting Remaining Useful Life of Bearings Based on Multi-Layer Perception Neural Network and Bidirectional Long Short-Term Memory Network

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Structural Durability & Health Monitoring 2025年第2期19卷 365-383页

作者： Yongfeng Tai Xingyu Yan Xiangyi Geng Lin Mu Mingshun Jiang Faye Zhang CRRC Qingdao Sifang Co. Ltd.Qingdao266111China School of Control Science and Engineering Shandong UniversityJinan250061China Public(Innovation)Experimental Teaching Center Shangdong UniversityQingdao266237China Engineering Training Center Shangdong UniversityJinan250061China

The remaining useful life prediction of rolling bearing is vital in safety and reliability *** engineering scenarios,only a small amount of bearing performance degradation data can be obtained through accelerated life *** the absence of lifetime data,the hidden long-term correlation between performance degradation data is challenging to mine effectively,which is the main factor that restricts the prediction precision and engineering application of the residual life prediction *** address this problem,a novel method based on the multi-layer perception neural network and bidirectional long short-term memory network is ***,a nonlinear health indicator(HI)calculation method based on kernel principal component analysis(KPCA)and exponential weighted moving average(EWMA)is ***,using the raw vibration data and HI,a multi-layer perceptron(MLP)neural network is trained to further calculate the HI of the online bearing in real ***,The bidirectional long short-term memory model(BiLSTM)optimized by particle swarm optimization(PSO)is used to mine the time series features of HI and predict the remaining service *** verification experiments and comparative experiments are carried out on the XJTU-SY bearing open *** research results indicate that this method has an excellent ability to predict future HI and remaining life.

关键词： Remaining useful life prediction rolling bearing health indicator construction multilayer perceptron bidirectional long short-term memory network

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