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A multi-input single-output thermal management system design for liquid metal batteries

APPLIED THERMAL ENGINEERING 2023年第PartB期219卷

作者： Zhang, Yi Wang, Sheng Guo, Zhenlin Li, Haomiao Jiang, Kai Zhou, Min Huazhong Univ Sci & Technol HUST Sch Elect & Elect Engn State Key Lab Adv Electromagnet Engn & Technol Wuhan 430074 Peoples R China Minist Educ Engn Res Ctr Power Safety & Efficiency Wuhan 430074 Peoples R China

Liquid metal battery, with three-liquid-layer structure and high operating temperature, is a novel battery technology that shows great potential in grid energy storage. However, unlike lithium-ion batteries, liquid metal batteries are supposed to be heated to a high temperature before operation. Both temperature uniformity among cells and total energy consumption minimization is demanded in the preheating process. In this paper, an efficient thermal management controller design is proposed to optimize the temperature uniformity and energy consumption. Different from previous work, this design replaces the conventional single-input single-output controller with a multi-input single-output controller, which samples temperatures at different locations to control the heating rate. Experimental results show that the final controller error reaches a value of 1.2%. Based on the thermal management system design, a preheating strategy is further proposed to achieve the optimal balance between temperature uniformity and energy consumption. Compared with common strategies, the maximum temperature difference is reduced by 13.7% to 49.85 degrees C, and the energy consumption is reduced by 6.7% of the total module energy to 6.33 kWh. It is demonstrated in this study that the proposed thermal management system and heating strategy essentially improves the heating process of liquid metal battery stack.

关键词： Liquid metal battery Thermal management system multi-input single-output Temperature sensor array Temperature difference Energy consumption

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Modeling the Combination of UPQC and Photovoltaic Arrays with multi-input single-output DC-DC Converter

Modeling the Combination of UPQC and Photovoltaic Arrays wit...

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IEEE/PES Power Systems Conference and Exposition

作者： Davari, M. Ale-Emran, S. M. Yazdanpanahi, H. Gharehpetian, G. B. Amirkabir Univ Technol Dept Elect Engn Tehran Iran

ISBN: (纸本)9781424438105

In this paper analysis results of a cooperation of the Unified Power Quality Conditioner (UPQC) with the photovoltaic system are presented. The proposed system consists of a series inverter, a shunt inverter, and some photovoltaic arrays connected in the dc link through the multi-input single-output (MISO) DC-DC converter. A numerical formulation of the proposed control schemes, which are based on the instantaneous power theory, is presented. The proposed system can improve the power quality at the Point of Common Coupling (PCC) on power distribution systems. The performance of the proposed system was analyzed using simulations with Power System Computer Aided Design/ElectroMagnetic Transients DC (PSCAD/EMTDC) analysis program.

关键词： Distribution System (DG) multi-input single-output photovoltaic array Power Quality Unified Power Quality Conditioner (UPQC)

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Joint Association, Beamforming, and Resource Allocation for multi-IRS Enabled MU-MISO Systems With RSMA

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IEEE TRANSACTIONS ON MOBILE COMPUTING 2025年第3期24卷 1602-1620页

作者： Wang, Chunjie Zhang, Xuhui Xing, Huijun Xue, Liang Wang, Shuqiang Shen, Yanyan Yang, Bo Guan, Xinping Chinese Acad Sci Shenzhen Inst Adv Technol Shenzhen 518055 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China Hebei Univ Engn Sch Informat & Elect Engn Handan 056038 Peoples R China Hebei Key Lab Secur & Protect Informat Sensing & P Handan 056038 Peoples R China Chinese Univ Hong Kong Future Network Intelligence Inst Sch Sci & Engn Shenzhen 518172 Guangdong Peoples R China Chinese Univ Hong Kong Guangdong Prov Key Lab Future Networks Intelligenc Shenzhen 518172 Guangdong Peoples R China Imperial Coll London Dept Elect & Elect Engn London SW7 2AZ England Chinese Univ Hong Kong Future Network Intelligence Inst Sch Sci & Engn Shenzhen 518172 Guangdong Peoples R China Enterprise Innovat Ctr Energy Internet Sch Cloud Data Sensing Intelligence Handan 056002 Peoples R China Shanghai Jiao Tong Univ Dept Automat Shanghai 200240 Peoples R China Shanghai Jiao Tong Univ Key Lab Syst Control & Informat Proc Minist Educ Shanghai 200240 Peoples R China

Intelligent reflecting surface (IRS) and rate-splitting multiple access (RSMA) technologies are at the forefront of enhancing spectrum and energy efficiency in the next generation multi-antenna communication systems. This paper explores a RSMA system with multiple IRSs, and proposes two purpose-driven scheduling schemes, i.e., the exhaustive IRS-aided (EIA) and opportunistic IRS-aided (OIA) schemes. The aim is to optimize the system weighted energy efficiency (EE) under the above two schemes, respectively. Specifically, the Dinkelbach, branch and bound, successive convex approximation, and the semidefinite relaxation methods are exploited within the alternating optimization framework to obtain effective solutions to the considered problems. The numerical findings indicate that the EIA scheme exhibits better performance compared to the OIA scheme in diverse scenarios when considering the weighted EE, and the proposed algorithm demonstrates superior performance in comparison to the baseline algorithms.

关键词： Intelligent reflecting surface rate-splitting multiple access multi-input single-output energy efficiency beamforming Intelligent reflecting surface rate-splitting multiple access multi-input single-output energy efficiency beamforming

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Leveraging Active and Nearly Passive Reconfigurable Intelligent Surfaces Using Deep Learning Algorithm for 6G Wireless Networks

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Transactions on Emerging Telecommunications Technologies 2025年第5期36卷

作者： Amal Megahed Mahmoud M. Elmesalawy Ahmed. M. Abd El-Haleem Ibrahim I. Ibrahim Department of Electronics and Communications Engineering Faculty of Engineering Helwan University Cairo Egypt

Active Reconfigurable Intelligent Surface (ARIS) shows promise in boosting the desired signal at the receiver user. However, the “fully-connected” architecture of ARIS needs high power due to additional active components. This paper adopts sub-connected ARIS to enhance achieved data rates with good energy efficiency at the Cell Edge Users (CEUs) and addresses the “multiplicative fading” effect caused when the signal propagates through a longer path (i.e., the serving Base Station (BS)-ARIS-CEU) than the straight route across the serving BS and the CEUs. Additionally, a Nearly Passive RIS (NP-RIS) is proposed to mitigate interfering signals from other BSs by creating destructive interference at the CEUs. The reflection matrix of the NP-RIS is extracted using Deep Learning (DL) techniques, with a select few NP-RIS reflecting elements being active. This model improves achieved data rates by around 58% for M = 16 RIS elements compared with the baseline model with the same number of elements in NP-RIS without ARIS implementation. Moreover, the proposed model enhances data rates by approximately 31.8% compared with a baseline using negative resistance Reflecting Elements (RE). However, the Spectral Energy Efficiency (SEE) using the second baseline will be improved over the “fully-connected” ARIS leading to the sub-connected ARIS solution to improve the SEE by nearly 25%.

关键词： active reconfigurable intelligent surface beamforming deep learning multi-input single-output nearly-passive reconfigurable intelligent surface spectral energy efficiency

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Secrecy Capacity Achievable Time Reversal Pre-filter in MISO Communication System and the Unequal Secrecy Protection Application

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WIRELESS PERSONAL COMMUNICATIONS 2017年第4期97卷 5427-5437页

作者： Cao, Wei Lei, Jing Hu, Weidong Li, Wei Natl Univ Def Technol Coll Elect Sci & Engn ATR Key Lab Changsha Hunan Peoples R China

Classical time reversal (TR) pre-filtering has been considered as one of the key physical layer security techniques for wireless communication applications in the last decade. This paper proposes a secrecy capacity achievable time reversal pre-filter to further enhance the confidentiality of a multi-input single-output (MISO) wireless communication system. In addition, an unequal secrecy protection (UESP) MISO broadcast configuration is constructed in frequency selective channels by exploiting classical and secrecy capacity achievable TR pre-filters, so that UESP wireless communication services can be offered. Theoretical proofs and simulation results show that the proposed TR pre-filter achieves the secrecy capacity in frequency selective channels (HIPERLAN/2 BranA), and the MISO broadcast configuration can provide mobile users with three levels of UESP hierarchical services in terms of public, private and confidential messages.

关键词： Time reversal Physical layer security Secrecy capacity Unequal secrecy protection multi-input single-output

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A note on the stability of habituating process control

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JOURNAL OF PROCESS CONTROL 2004年第8期14卷 939-945页

作者： Alvarez-Ramirez, J Velasco, A Fernandez-Anaya, G Univ Autonoma Metropolitana Iztapalapa Dept Ingn Proc & Hidraul Mexico City 09340 DF Mexico Univ Iberoamer Dept Fis & Matemat Mexico City 07720 DF Mexico Inst Mexicano Petr Programa Invest Matemat Aplicadas & Computac Mexico City 02012 DF Mexico

For a class of single-output processes with at least two control inputs, this note proposes a simple control design and study its stability. To this end, the process is factorized into a stable and non-minimum-phase factor and a possible unstable minimum-phase factor. By the addition of a (low-pass) filter of suitable dimension, one can obtain a process factorization where the minimum-phase factor has a proper and stable inverse. Once the plant has been factorized in this form, the proposed control synthesis method is composed of two main steps;namely, output regulation based on the non-minimum-phase factor and design of an optimization-based divider to compute the value corresponding to the multiple inputs. In this way, one obtains the control transfer function of each control input in a parallel control architecture. An analysis of the control structure is provided, giving sufficient conditions for the stability of the control loop. (C) 2004 Published by Elsevier Ltd.

关键词： habituating control multi-input single-output chemical reactor control

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Electronically tunable MOSFET-only current-mode biquad filter

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AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS 2017年 81卷 227-235页

作者： Yesil, Abdullah Ozenli, Deniz Arslan, Emre Kacar, Firat Bandirma Onyedi Eylul Univ Dept Naval Architecture & Marine Engn TR-10200 Balikesir Turkey Marmara Univ Dept Elect & Elect Engn TR-34722 Istanbul Turkey Istanbul Tech Univ Dept Elect & Commun Engn TR-34469 Istanbul Turkey Istanbul Univ Dept Elect & Elect Engn TR-34320 Istanbul Turkey

A novel current mode MOSFET-only structure with multi-input single-output (MISO) is proposed. The proposed circuit is free from passive circuit elements like resistors and capacitors and able to realize low-pass (LP), band-pass (BP), high-pass (HP), band-stop (BS) and all-pass (AP) filter functions with using the same circuit configuration. It is also important to note that the proposed filter has electronic tunability property. The proposed circuit is laid-out in the Cadence environment using 0.18 mu m TSMC CMOS technology parameters. The layout area is only 408 mu m(2) and the power consumption is about 0.6 mW. Furthermore, to investigate the performance of the BP filter output of the proposed MISO filter, Monte Carlo and corner analyses are also presented. It is shown that the mismatches and the process variations cause only small deviations for the BP filter configuration. Furthermore, the noise performance of the proposed filter is also investigated. (C) 2017 Elsevier GmbH. All rights reserved.

关键词： Current mode filter multi-input single-output Electronically tunable MOSFET-only Analog filter design Analog integrated circuit

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Intrinsic Robustness of MISO Visible Light Communications: Partial CSIT Can be as Useful as Perfect One

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IEEE TRANSACTIONS ON COMMUNICATIONS 2019年第2期67卷 1297-1312页

作者： Zhang, Yan-Yu Natl Digital Switching Syst Engn & Technol Res Ct Zhengzhou 450000 Henan Peoples R China

We consider a multi-input single-output visible light communication (MISO-VLC) system. For such system under both average and peak optical power constraint, an optimal space constellation maximizing the received minimum Euclidean distance is attained among all the feasible sets, respectively, for the case with or without channel state information at the transmitter (CSIT). These designs demonstrate that the optimal transmission only requires CSIT which is related to the possibilities of the echelon arrangement of the channel coefficients and jointly determined by the power regime and the ordering of channel coefficient values. Our findings point out that it is not necessary to probe the exact value of the MISO-VLC channel vector and limited CSIT can sufficiently guarantee the intrinsic robustness. In addition, the optimal designs admit low-complexity maximum likelihood detection. These properties make our proposed optimal designs especially attractive in such channels.

关键词： Visible light communications multi-input single-output channel state information intrinsic robustness

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Constellation-Optimal Beamformers for multiuser MISO Broadcast Visible Light Communications

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IEEE TRANSACTIONS ON INFORMATION THEORY 2019年第6期65卷 3848-3870页

作者： Zhang, Yan-Yu Yu, Hong-Yi Zhang, Jian-Kang Natl Digital Switching Syst Engn & Technol Res Ct Zhengzhou 450000 Peoples R China McMaster Univ Dept Elect & Comp Engn Hamilton ON L8S 4K1 Canada

In this paper, we design energy-efficient space constellations for multiuser multi-input single-output visible light communication broadcast systems with channel state information (CSI) at the receiver in the three scenarios: 1) with CSI at the transmitter (CSIT);2) with statistical CSIT;and 3) without CSIT. By utilizing the cooperation of multiuser interference, optimal multidimensional additively uniquely decomposable constellation groups are designed to optimize the received worst case performance metrics of all users subject to two commonly used power constraints, i.e., average and peak optical power constraints. The resulting optimal designs are proved to be pulse amplitude modulated with an optimal beamformer, which can be efficiently attained by numerical search for Scenarios 1 and 2 and be given in a closed form for Scenario 3. One of the common significant advantages of these designs is the fast demodulation of the sum signal from a noisy received signal, since these optimal designs result in an equivalent ideal scalar AWGN channel. Comprehensive computer simulations demonstrate that our designs significantly outperform traditional zero-forcing, minimum mean square error, and time-division methods.

关键词： Additively uniquely decomposable constellation group broadcast channels maximum likelihood detection multi-input single-output optimal multidimensional constellation and visible light communications

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Deinterleaving of Mixtures of Renewal Processes

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IEEE TRANSACTIONS ON SIGNAL PROCESSING 2019年第4期67卷 885-898页

作者： Young, Jeremy Host-Madsen, Anders Nosal, Eva-Marie Univ Hawaii Manoa Dept Elect Engn Honolulu HI 96822 USA Shenzhen Res Inst Big Data Shenzhen Peoples R China Univ Hawaii Manoa Dept Ocean & Resources Engn Honolulu HI 96822 USA

This paper proposes a new method for impulsive source separation (deinterleaving) in multi-input single-output systems based purely on impulse spacing. The impulse spacing for each source is modeled as a renewal process. To classify sources, an algorithm is developed to maximize the likelihood of impulse assignment based on the impulse spacing distributions. A theoretical lower bound on performance is derived and the algorithm is shown to get reasonably close to the bound. The algorithm is extended for use when the impulse spacing distribution parameters are unknown. Performance is evaluated on multiple application examples.

关键词： Deinterleaving click trains jitttered PRI radar source separation renewal process marine mammals impulsive sources multi-input single-output

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