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Q-Learing-Based Multi-Rate Optimal control and Its Application

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Q-Learing-Based Multi-Rate Optimal Control and Its Applicati...

Chinese control and Decision Conference, CCDC

作者： Zhenxing Xia Wei Dai School of Information and Control Engineering China University of Mining and Technology Xuzhou State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang China

ISBN: (纸本)9781665478977

In this paper, adaptive dynamic programming (ADP) algorithm, with lifting technology, is develop to solve the multi-rate optimal control problem for discrete-time linear systems. We make use of the lifting technology to convert the multi-rate sample control problem to the single-rate one in the uniform cycle. The propose a Q-Leaming based approach to learn the optimal regulator by a value iteration (VI) algorithm. First, a class of continuous-time (CT) linear system with multi-timescale is considered. Then, the convergence of a Q-Learning based algorithm is given. It is proven that the iterative cost function precisely converges to the optimal value, and the control input also converges to the optimal values. Finally, HIL system for grinding process is given to illustrate the effective performance of the proposed method.

关键词： Linear systems Regulators Q-learning System dynamics Heuristic algorithms Optimal control Process control

Laruo3 Perovskites as Effective and Reusable Heterogeneous Catalysts to Activate Peroxymonosulfate for Carbamazepine Degradation

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SSRN 2022年

作者： Zhou, Xuefei Li, Jiacheng Guo, Huichao Zhang, Yalei Yang, Libin Chen, Jiabin State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Sulfate radical-based technologies have been frequently applied to degrade pharmaceutical and personal care products (PPCPs). Metal-based catalysts have shown great potential for activating persulfate (PS) and peroxymonosulfate (PMS) to degrade PPCPs. In this study, a Ru-based perovskite (ARuO3, A= La, Ba, Ce, Sr) was synthesized by the sol-gel method and used as a catalyst to activate PMS for the degradation of carbamazepine (CBZ). Results show that the A-site cations had a significant influence on the catalytic performance of perovskite, and the degradation efficiency of CBZ in descending order was: La > Ba > Sr > Ce. LaRuO3 was selected as the optimal catalyst for CBZ degradation. LaRuO3 could efficiently activate PMS to degrade CBZ in a neutral environment. The reaction rate constant had a positive linear correlation with the concentration of PMS in a range between 0.1mM and 0.5 mM. ESR analysis and radical quenching experiments confirmed the existence of 1O2, •OH, and SO4•- in the LaRuO3/PMS system, and SO4•- played the most significant role in decomposing CBZ. The recycling experiment and XPS spectrogram suggested good stability and reusability of LaRuO3. © 2022, The Authors. All rights reserved.

关键词： Lanthanum compounds

Operando Monitoring of Internal Strain at Solid-state Lithium-Metal Batteries with Fiber Optical Sensor

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SSRN 2023年

作者： Guo, Jun Zhu, Kongjun Wu, Qi Liu, Jingsong Yan, Kang Wang, Jing State Key Laboratory of Mechanics and Control for Aerospace Structures College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing210016 China College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing210016 China

Embedded fiber optic sensors provide a crucial technique for understanding the fundamental chemical and physical state of a cell during operation, thereby advancing the reliability, lifetime, and safety of cells. However, the interfacial compatibility between the implanted sensor and electrode materials has not received sufficient attention. This study demonstrates the incorporation of a fiber Bragg grating sensor into a solid-state lithium-metal cell to explore electrochemical property changes by placing the sensor at different interfaces. Our findings reveal that the presence of the sensor accelerates the capacity fade compared to that of the pristine cell. Furthermore, the strain signals collected from the optical sensor indicate loose contact between the sensor and the electrode materials. To address this issue, we propose a surface coating strategy for the sensor to enhance interfacial compatibility. As a proof of concept, we focused on multi-walled carbon nanotubes and polydopamine. Our results demonstrate that the modified sensor can be firmly attached to the electrode surface without interfering with its operation. Notably, the capacity retention of the cell increased by approximately 30% after 60 cycles when the PDA-coated sensor was embedded inside the cell. This technique offers a scalable solution for long-time and in situ monitoring of battery state, thereby improving the reliability and safety of cells. © 2023, The Authors. All rights reserved.

关键词： Fiber optic sensors

Stabilization of Cr-Containing Electroplating Sludge by Coal-Based Solid Waste Geopolymers

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SSRN 2023年

作者： Li, Song Zhu, Xianxiang Zhang, Wenquan College of Energy and Mining Engineering Shandong University of Science and Technology Qingdao266590 China State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province the Ministry of Science and Technology Qingdao266590 China

The alkaline-activated coal gangue-slag (CGS) binder was used to stabilize the electroplating sludge and the impact of electroplating sludge dosage and incineration on the compressive strength of the polymer and the leaching rate of chromium (Cr). The dosage of sludge has a negative correlation with compressive strength. Additionally, the compressive strength of incinerated electroplating sludge samples is better than that of non-incinerated sludge. The precipitation effect of heavy metal ions in electroplating sludge. It was found that incineration of the sludge promotes the oxidation of Cr(VI) to Cr(III) in the stone body, leading to improved stabilization efficiency of heavy metals. © 2023, The Authors. All rights reserved.

关键词： Chemical modification

Study on Self-Organizing Aggregation Method for Massive Flexible Resources and Its Simulation

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Study on Self-Organizing Aggregation Method for Massive Flex...

Advanced Electrical and Energy Systems (AEES), International Conference on

作者： Changwei Yin Wenlu Ji Ting Ye Tingfeng Mao Kaifeng Zhang Ministry of Education Key Laboratory of Measurement and Control of Complex Systems of Engineering Southeast University Nanjing China Nanjing Power Supply Company of State Grid Jiangsu Electric Power Co. Ltd. Nanjing China

Distributed flexible resources are developing in the trend of sea quantization. In this situation, the existing resource aggregation methods are facing bottlenecks, and it is difficult to fully exploit the regulation potential of massive flexible resources. In order to achieve efficient and flexible aggregation in the scenario of massive resources, this paper proposes a self-organizing aggregation method for flexible resources based on the social network and simulates the aggregation process under the proposed method based on the multi-agent simulation platform NetLogo. Firstly, this paper outlines the idea of the self-organizing aggregation method for flexible resources, which projects flexible resources from the physical space to the social network space, and realizes flexible aggregation through the interactive attraction between resources in the social network. Secondly, this paper establishes a simulation model for flexible resource self-organizing aggregation based on the NetLogo platform. The model defines four types of agents involved in the self-organizing aggregation process and provides detailed specifications for their attributes and interaction rules. Finally, simulation experiments are designed to verify the rationality of the self-organizing aggregation method and simulation model proposed in this paper. The simulation results show that, following the idea of self-organizing aggregation, massive flexible resources can autonomously and flexibly aggregate through the interaction attraction in the social network due to the incentive of task gain, demonstrating the effectiveness and rationality of the self-organizing aggregation method and the simulation model proposed in this paper.

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Integrins as attractive targets for cancer therapeutics

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Acta Pharmaceutica Sinica B 2021年第9期11卷 2726-2737页

作者： Meng Li Ying Wang Mengwei Li Xuezhen Wu Sarra Setrerrahmane Hanmei Xu National Institutes for Food and Drug Control Beijing 102629China State Key Laboratory of Natural Medicines Ministry of Educationthe Engineering Research Center of Synthetic Polypeptide Drug Discovery and Evaluation of Jiangsu ProvinceDepartment of Marine PharmacyChina Pharmaceutical University Nanjing 211198ChinaAffiliated Hospital of Chifeng CollegeInner Mongolia Autonomous Region 024005China

Integrins are transmembrane receptors that have been implicated in the biology of various human physiological and pathological *** molecules facilitate cell-extracellular matrix and cell-cell interactions,and they have been implicated in fibrosis,inflammation,thrombosis,and tumor *** role of integrins in tumor progression makes them promising targets for cancer treatment,and certain integrin antagonists,such as antibodies and synthetic peptides,have been effectively utilized in the clinic for cancer ***,we discuss the evidence and knowledge on the contribution of integrins to cancer ***,we summarize the clinical attempts targeting this family in anti-cancer therapy development.

关键词： Integrins Extracellular matrix Tumor progression Targeted drug Antagonists Clinical trial

Multi-BS Fusion Scheme for PHD Simultaneous Localization and Mapping

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Multi-BS Fusion Scheme for PHD Simultaneous Localization and...

International Conference on Communication Technology (ICCT)

作者： Tao Du Jie Yang Shuqiang Xia Shi Jin National Mobile Communications Research Laboratory Southeast University Nanjing Jiangsu China Frontiers Science Center for Mobile Information Communication and Security Southeast University Nanjing China Key Laboratory of Measurement and Control of Complex Systems of Engineering Southeast University Nanjing China ZTE Corporation Shenzhen China State Key Laboratory of Mobile Network and Mobile Multimedia Shenzhen China

Integrated sensing and communication (ISAC) is expected to improve the energy and spectral efficiency of communication systems. Probability hypothesis density (PHD) simultaneous localization and mapping (SLAM) without explicit data association is one of the mainstream algorithms for implementing sensing function in ISAC. However, most existing research focused on multi-sensor and multi-user sensing fusion, while few studies involve multi base station (BS) fusion schemes. In this study, we introduce the virtual reference point rather than common used virtual anchor to model reflecting surface to form a consistent description of the surrounding environment among different BSs. Then, the estimation results of BSs are sequentially utilized as prior information, which is compared with arithmetic average (AA) and generalized covariance intersection (GCI) fusion algorithms. To improve the poor performance of existing schemes when filed of view (FoV) of different BSs is partial overlapped, we propose the concept of establishing global cloud map. The AA fusion algorithm is integrated into cloud fusion to improve the map estimation performance. Simulation results demonstrate that the performance of sequential fusion is superior to AA and GCI schemes when FoVs of different BSs are fully overlapped. Besides, the cloud map fusion scheme can obtain global maps even if some features are no longer in FoV, as well as improve the accuracy and stability of local maps estimation for each BS.

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Rheological and Magnetic Properties of Stable Poly Alpha Olefins Based Ferrofluids with High Viscosity and Magnetization

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SSRN 2022年

作者： Li, Liu Li, Decai Zhang, Zhili School of Mechanical Electronic and Control Engineering Beijing Jiaotong University Beijing100044 China State Key Laboratory of Tribology Tsinghua University Beijing100084 China

Poly alpha olefins (PAO) based ferrofluids (FFs) have been synthesized containing novel double-layer surfactants stabilized 10 nm diameter magnetite nano powders, which could maintain stable in PAO-4 and PAO-10 base liquids for more than 2 months. The PAO based FFs prepared in this study could reach a viscosity of 3000 mPa·s at the room temperature and a powder ratio of over 30%wt. The viscosity performance of FFs under diverse magnetic fields and temperatures are characterized systematically. The smooth variation curves of viscosity under diverse shear rates indicate that the FFs maintains stable under the shear stress in our study. Yield stress for PAO-4 and PAO-10 based FFs are obtained as values of 3.7 Pa and 1.5 Pa, respectively. PAO based ferrofluids exhibit high viscosity, high saturated magnetization, steady performance of viscosity with the variation magnetic fields and moderate yield stress, ensuring the PAO based FFs a promising candidate material for magnetic rotary sealing and lubrication uses. © 2022, The Authors. All rights reserved.

关键词： Viscosity

Electrochemical oxidation of chloramphenicol by modified Sm-PEG-PbO2 anodes: Performance and mechanism

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Chemosphere 2023年第1期327卷

作者： Zhang, Chaoyang Gao, Conghao Yang, Shumin He, Xin Chen, Yue Qin, Xiao Tang, Yulin State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science & Engineering Tongji University Shanghai200092 China Key Laboratory of Water Supply Water Saving and Water Environment Treatment for Towns in the Yangtze River Delta Ministry of Water Resources Shanghai200092 China Hebei Haikuo Environmental Protection Technology Co. LTD Baoding071000 China

Chloramphenicol (CAP) is used extensively in industry and daily life, but its abuse has seriously affected the environment and public health. In this paper, a new composite PbO2 electrode was obtained through the modification Sm and polyethylene glycol (PEG), and an electrocatalytic oxidation technology of CAP degradation was investigated. The results showed that the catalytic degradation ability and industrial service life of the PEG-Sm-PbO2 composite electrode were significantly enhanced. Co-doping inhibited the growth of grains, resulting in the formation of refined pyramidal grains on the surface of the electrode, which increased the number of active spots. The industrial service life of the modified electrode was improved by 87.0%. In addition, the degradation effect under different conditions and mechanism of CAP were also explored. The optimal conditions for CAP degradation were explored, at which time the CAP degradation rate reached 99.1%. The degradation process was in accordance with the primary reaction kinetics, and the apparent rate constant of CAP at the PEG-Sm-PbO2 electrode was raised by 57.1% in comparison with the unmodified electrode, indicating that the modification facilitated the degradation of CAP in the electrode. Finally, two possible CAP degradation pathways were deduced. The results will provide technical support and a theoretical basis for the degradation of persistent organic pollutants. © 2023 Elsevier Ltd

关键词： Degradation