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Bipolar Direct AC/AC Conversion-based Dual-bus Parallel Supply System and Its Flexible Regulation Characteristics

Protection and control of modern Power Systems 2025年第3期10卷 114-124页

作者： Yibo Wang Yu Liu Chuang Liu Guowei Cai Xinyi Zhang Kaipu Liu Yuan Wang Chen Liu Zhanhui Du Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Northeast Electric Power University Jilin China

In the context of increasing demand for flexibility and controllability in distribution networks, this paper proposes a dual-bus parallel supply (DBPS) system based on bipolar direct AC/AC conversion. First, the topology of the DBPS system, which is composed of both conventional and flexible bus ports, is described. Then, through analyzing the principles of the DBPS system, the voltage flexible regulation range is obtained, and its superiority over a topological reciprocity system is achieved. Then, a control strategy for the DBPS system is proposed based on the theory of power flow regulation of distribution ring networks and the principles of flexible bus regulation of the DBPS system. Finally, simulation analyses on flexible control scenarios in different networking modes of the DBPS system verify the correctness and validity of the proposed theory.

关键词： Protective relaying Distribution networks Reliability theory controllability Regulation Topology Power system reliability Voltage control Protection Load flow

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Targeting vulnerable microcircuits in the ventral hippocampus of male transgenic mice to rescue Alzheimer‑like social memory loss

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Military Medical Research 2025年第1期12卷 48-71页

作者： Hui-Yang Lei Gui-Lin Pi Ting He Rui Xiong Jing-Ru Lv Jia-Le Liu Dong-Qin Wu Meng-Zhu Li Kun Shi Shi-Hong Li Na-Na Yu Yang Gao Hui-Ling Yu Lin-Yu Wei Xin Wang Qiu-Zhi Zhou Pei-Lin Zou Jia-Yang Zhou Ying-Zhou Liu Nai-Ting Shen Jie Yang Dan Ke Qun Wang Gong-Ping Liu Xi-Fei Yang Jian-Zhi Wang Ying Yang Department of Pathophysiology School of Basic MedicineKey Laboratory of Education Ministry of China/Hubei Province for Neurological DisordersTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Traditional Chinese Medicine the Central Hospital of WuhanTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430014China Key Laboratory of Modern Toxicology of Shenzhen Shenzhen Center for Disease Control and PreventionShenzhen 518055GuangdongChina Co‑Innovation Center of Neuroregeneration Nantong UniversityNantong 226000JiangsuChina

Background:Episodic memory loss is a prominent clinical manifestation of Alzheimer’s disease(AD),which is closely related to tau pathology and hippocampal *** to the heterogeneity of brain neurons,the specific roles of different brain neurons in terms of their sensitivity to tau accumulation and their contribution to AD-like social memory loss remain ***,further investigation is ***:We investigated the effects of AD-like tau pathology by Tandem mass tag proteomic and phosphoproteomic analysis,social behavioural tests,hippocampal electrophysiology,immunofluorescence staining and in vivo optical fibre recording of GCaMP6f and ***,we utilized optogenetics and administered ursolic acid(UA)via oral gavage to examine the effects of these agents on social memory in ***:The results of proteomic and phosphoproteomic analyses revealed the characteristics of ventral hippocampal CA1(vCA1)under both physiological conditions and AD-like tau *** tau progressively accumulated,vCA1,especially its excitatory and parvalbumin(PV)neurons,were fully filled with mislocated and phosphorylated tau(p-Tau).This finding was not observed for dorsal hippocampal CA1(dCA1).The overexpression of human tau(hTau)in excitatory and PV neurons mimicked AD-like tau accumulation,significantly inhibited neuronal excitability and suppressed distinct discrimination-associated firings of these neurons within *** excitatory and PV neurons in vCA1 at specific rhythms and time windows efficiently ameliorated tau-impaired social ***,1 month of UA administration efficiently decreased tau accumulation via autophagy in a transcription factor EB(TFEB)-dependent manner and restored the vCA1 microcircuit to ameliorate tau-impaired social ***:This study elucidated distinct protein and phosphoprotein networks between dCA1 and vCA1 and highlighted the susceptibility of the vCA1 microcircuit to AD-like tau

关键词： Alzheimer’s disease Tau protein Ventral hippocampus Social memory Ursolic acid Transcription factor EB(TFEB)

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Thermal constraint control of reversible solid oxide cell for optimal system efficiency

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International Journal of Hydrogen Energy 2025年 134卷 198-211页

作者： Xu, Yuanwu Yin, Jie Wang, Jingjing Wu, Xiao-long Peng, Jingxuan Tang, Ruifeng Zou, Suhang Fu, Xiaowei Li, Xi School of Artificial Intelligence and Automation Wuhan University of Science and Technology Hubei Wuhan430081 China School of Artificial Intelligence and Automation Key Laboratory of Image Processing and Intelligent Control of Education Ministry Huazhong University of Science and Technology Hubei Wuhan430074 China School of Information Engineering Nanchang University Jiangxi Nanchang330031 China School of Electrical and Electronic Engineering Nanyang Technological University 639798 Singapore China-Poland Belt and Road Joint Laboratory on Measurement and Control Technology Huazhong University of Science and Technology Hubei Wuhan430074 China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen518055 China

Reversible solid oxide cell (RSOC) demonstrates considerable promise in multimodal energy conversion architectures, particularly as a technology for hydrogen-based energy storage systems. Nevertheless, under dynamic operating regimes with time-varying current inputs, realizing time-efficient and reliable transitions to steady-state operation remains difficult. This difficulty arises from the intricate coupling of thermal, electrical, and gaseous processes within the RSOC system. This study aims to address these challenges by developing a 5 kW mathematical model of the RSOC system. The proposed model enables systematic investigation of thermal safety issues arising during current switching operations while introducing a thermal constraint control strategy to enhance both system efficiency and thermal safety performance. This efficiency-driven study employs the Grid Search algorithm to identify optimal steady-state operating points for the RSOC system, ensuring strict adherence to safety constraints across varying current inputs. Furthermore, by integrating the pre-identified optimal operating points as feedforward control with Model Predictive control (MPC)-based feedback correction, this hybrid strategy effectively mitigates stack temperature gradient overshoot while synchronously ensuring optimal system efficiency throughout current transition processes. Under simulated variable current inputs, the proposed RSOC system model and control strategy demonstrate the capability to constrain stack temperature gradient overshoot within 2.3K while enhancing transient efficiency by 5 %–8 %, achieving a peak system efficiency of 85 %. It provides a novel methodology for safe and efficient working with intermittent renewable energy. © 2025 Hydrogen Energy Publications LLC

关键词： Thermal variables control

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Microplastics enhance the adsorption capacity of zinc oxide nanoparticles:Interactive mechanisms and influence factors

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Journal of Environmental Sciences 2025年第1期147卷 665-676页

作者： Weiping Xiong Min Hu Siying He Yuhang Ye Yinping Xiang Haihao Peng Zhaomeng Chen Zhengyong Xu Honglin Zhang Weixiang Li Shudian Peng College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)Ministry of EducationChangsha 410082China Hunan Boke Environmental Engineering Co.Ltd. Hengyang 421099China College of Environmental Protection and Safety Engineering University of South ChinaHengyang 421001China Hunan Modern Environmental Technology Co.Ltd. Changsha 410004China

Microplastics(MPs)are of particular concern due to their ubiquitous occurrence and propensity to interact and concentrate various waterborne contaminants from aqueous *** on the interaction and joint toxicity of MPs on engineered nanoparticles(ENPs)are exhaustive,but limited research on the effect of MPs on the properties of ENPs in multisolute ***,the effect of MPs on adsorption ability of ENPs to antibiotics was investigated for the first *** results demonstrated that MPs enhanced the adsorption affinity of ENPs to antibiotics and MPs before and after aging showed different effects on *** polyamide prevented aggregation of ZnONPs by introducing negative charges,whereas virgin polyamide affected ZnONPs with the help of electrostatic ***-IR and XPS analyses were used to probe the physicochemical interactions between ENPs and *** results showed no chemical interaction and electrostatic interactionwas the dominant force between ***,the adsorption rate of antibiotics positively correlated with pH and humic acid but exhibited a negative correlation with ionic *** study highlights that ENPs are highly capable of accumulating and transporting antibiotics in the presence of MPs,which could result in a widespread distribution of antibiotics and an expansion of their environmental risks and toxic effects on *** also improves our understanding of the mutual interaction of various co-existing contaminants in aqueous environments.

关键词： Microplastics Engineered nanoparticles Adsorption Tetracycline

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Transient Synchronization Stability Analysis of Grid-Following Converter Power Systems Using Local Network measurements 9th

Transient Synchronization Stability Analysis of Grid-Followi...

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9th Purple Mountain Form on Smart Grid Protection and control, PMF 2024

作者： Wei, Xiaoqiang Liu, Naiyuan He, Zhifeng Yang, Hao Sun, Zhenglong State Grid Heilongjiang Electric Power Company Limited Harbin150000 China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin132000 China

ISBN: (纸本)9789819616701

There is an urgent need to address the transient synchronization stability (TSS) problem caused by the increasing penetration of renewable resources into the power network through grid-following converters (GFL-VSCs). It is challenging to analyze the TSS in power systems with high penetration of renewable resources due to the complex interaction between a large number of GFL-VSCs and power network. Although some research has been carried out on TSS assessment of GFL-VSC systems, its application is limited because measuring the numerous internal parameters of distributed converters is hard. To fill this gap, this paper proposes a TSS analysis method using local network measurements. The present study first constructs a port energy function for PLL-controlled converters, establishing the relationship between the internal control and the transient energy of the converter. Secondly, the branch energy function is constructed using the law of energy conservation. Due to transient energy interactions between the converters and the branches, the transient instability characteristics of the converters are mapped into the network. Transient instability characteristics are extracted through PMUs in the network. On this basis, the TSS of the GFL-VSC systems is analyzed through the identified critical branches. Finally, the effectiveness of the proposed method is validated through simulations on the modified IEEE 39-BUS system and a practical power system. © State Grid Electric Power 2025.

关键词： Transient stability

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Analysis of the impact of substation grounding network on the resistive coupling of the surrounding gas pipeline system and the newly built grounding system under high frequency lightning currents

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Dianli Xitong Baohu yu Kongzhi/Power System Protection and control 2025年第9期53卷 166-175页

作者： Ma, Chenglian Yao, Xinyue Song, Mengqing Liu, Chunming Yang, Mao Sun, Li Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education [Northeast Electric Power University Jilin132012 China Beijing102206 China

Based on the analysis of the power frequency grounding network, this paper focuses on the upgrading of the old grounding networks in some substations and the safety protection of the surrounding pipeline systems in the power grid, taking a 500 kV substation’s new grounding network renovation project and a 220 kV substation’s grounding network pipeline stray current interference protection project as examples. Based on the four-layer soil model calculated using ETAP Power Station and CDEGS, combined with the CDEGS grounding network simulation software, actual models of the new and old grounding networks and surrounding metal pipelines are built. The resistive coupling effects on the grounding networks and its surrounding structures under power frequency and high-frequency currents are compared and analyzed. This paper specifically examines the similarities and differences between the effects of lightning currents and power frequency short-circuit currents on substation grounding networks and surrounding pipeline systems, identifying weak points in the discharge and dispersion process of high-frequency lightning currents. The results show that high-frequency lightning currents cause a sharp increase in the ground potential at the current injection point, with a rapid stepwise decaying of current amplitude, resulting in minimal impact on the ground potential at the edge of the grounding network. When metal pipelines exist around the substation, the sudden rise in transient voltage can easily cause partial discharge in the pipeline insulation layer, leading to a sudden drop in the potential of the gas pipeline insulation layer and resulting in breakdown. © 2025 Power System Protection and control Press. All rights reserved.

关键词： Short circuit currents

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A compact high flux polarized neutron beam generator

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Defence technology 2025年

作者： Yuan, Jun Ma, Tengfei Pan, Jing Zhang, Jie Zhang, Cheng National Key Laboratory of Land and Air Based Information Perception and Control Xi'an Modern Control Technology Research Institute Xi'an710065 China Saint Green Laboratory Xi'an710065 China

This paper introduced a compact high flux polarized neutron beam generator scheme, which used air as the working medium and had low energy consumption. The neutron beam generator adopted a linear three compartment configuration, sequentially using nitrogen nucleus tandem near range accelerated polarization target spallation nuclear reaction technology, neutron multiplication technology, neutron beam polarization and near range acceleration technology, neutron focusing and shooting control technology. Through design and equivalent verification, it has been proven that the total length of the device does not exceed 5 m, the effective range can reach several hundred kilometers, the neutron flux at the muzzle is not less than 1025 n·cm−2·s−1, which attenuates to 1010 n·cm−2·s−1 at a distance of several 100 km, and this flux can effectively strike the target. It can be used as a defensive directed energy weapon with high energy density and has broad application prospects. © 2025 China Ordnance Society

关键词： Energy utilization

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Deep Reinforcement Learning Vehicle Visual Navigation Based on Attention Mechanism and LSTM 16th

Deep Reinforcement Learning Vehicle Visual Navigation Based ...

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16th International Conference on Modelling, Identification and control, ICMIC 2024

作者： Yu, Zhentao Zhang, Guojun Li, Ruoting Liu, Peng School of Instrument and Electronics North University of China Taiyuan030051 China The State Key Laboratory of Dynamic Measurement Technology North University of China Taiyuan030051 China School of Electrical and Control Engineering North University of China Taiyuan030051 China

ISBN: (纸本)9789819617760

This paper studies the visual navigation of vehicles in unknown environments. Due to the lack of global information, the accuracy of graphical navigation method will be decline. We propose a double LSTM attention navigation model to improve vehicle navigation performance. The model utilizes a dual-channel LSTM network for processing time series data and introduces an attention mechanism into the asynchronous dominant actor critic algorithm to mitigate the reward sparsity problem. Through comparative with various models on the AI2-THOR platform, the enhanced model improves the cumulative rewards and success rates of visual navigation. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Deep reinforcement learning

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Synergistic Task-Offloading in 6g Edge Networks Based on Propagation Dynamics

SSRN

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SSRN 2025年

作者： Zhu, Chao Zhang, Yuexia Wang, Xinyi Zhu, Xuzhen The Key Laboratory of Information and Communication Systems Ministry of Information Industry Beijing Information Science and Technology University Beijing China The Key Laboratory of Modern Measurement & Control Technology Ministry of Education Beijing Information Science & Technology University Beijing China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China

In future 6G edge networks, Device-to-Device (D2D)-assisted Mobile Edge Computing (MEC) can fully utilize the idle resources of smart terminals and alleviate the burden on backhaul links. However, the limited idle resources of smart terminals and the over-reliance on D2D-assisted computation offloading may result in a large number of terminals experiencing task overload, which could lead to the risk of edge network paralysis. To address these issues, this paper establishes a Service-Auxiliary-Request-Healing (SARH) task-offloading propagation model based on propagation dynamics theory. This model describes the dynamic transmission process of offloaded tasks in 6G edge networks and constructs two linear threshold functions to characterize the differences in task processing capabilities between user terminals and edge servers. Furthermore, the proposed task-offloading propagation model is theoretically analyzed using edge compartment theory, and the propagation dynamics equations are established to derive the saddle point and critical conditions leading to task overload in a large number of user terminals, providing theoretical guidance for preventing network paralysis. Finally, simulation results show that the SARH model effectively describes the task-offloading propagation process in edge networks, and by controlling key factors such as the proportion of user terminals selecting D2D-assisted MEC synergistic task-offloading, network connectivity density, and network degree distribution heterogeneity, network paralysis can be avoided. © 2025, The Authors. All rights reserved.

关键词： Computation offloading

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Shifting Spotlight for Co-supervision: A Simple yet Efficient Single-branch Network to See Through Camouflage

Shifting Spotlight for Co-supervision: A Simple yet Efficien...

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2025 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2025

作者： Hu, Yang Zhang, Jinxia Zhang, Kaihua Yuan, Yin Huang, Jiale Zhan, Zechao Wang, Xin Key Laboratory of Measurement and Control of CSE School of Automation Southeast University China School of Computer Science Nanjing University of Information Science and Technology China Advanced Ocean Institute of Southeast University China Alibaba Group China

ISBN: (纸本)9798350368741

Camouflaged object detection (COD) remains a challenging task in computer vision. Existing methods often resort to additional branches for edge supervision, incurring substantial computational costs. To address this, we propose the Co-Supervised Spotlight Shifting Network (CS3Net), a compact single-branch framework inspired by how shifting light source exposes camouflage. Our spotlight shifting strategy replaces multi-branch designs by generating supervisory signals that highlight boundary cues. Within CS3Net, a Projection Aware Attention (PAA) module is devised to strengthen feature extraction, while the Extended Neighbor Connection Decoder (ENCD) enhances final predictions. Extensive experiments on public datasets demonstrate that CS3Net not only achieves superior performance, but also reduces Multiply-Accumulate operations (MACs) by 32.13% compared to state-of-the-art COD methods, striking an optimal balance between efficiency and effectiveness. © 2025 IEEE.

关键词： Camouflaged Object Detection Efficient Network Design Network Co-supervision

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