检索结果-内蒙古大学图书馆

11th Frontier Academic Forum of Electrical engineering, FAFEE 2024

作者： Zhou, Qihao Liu, Baoquan Han, Meng School of Electrical and Control Engineering Shaanxi University of Science and Technology Xi’an710021 China

ISBN: (纸本)9789819788316

The LLC resonant converter, as a mainstream high-efficiency DC-DC converter, suffers from a narrow voltage regulation range. By employing a hybrid modulation technique combining Pulse Frequency Modulation (PFM) and Phase Shift Modulation (PSM), the voltage regulation range can be effectively expanded. However, traditional single controllers cannot simultaneously ensure system stability and responsiveness in both operating modes. To address this issue, a unified model for LLC resonant converters with hybrid modulation is proposed. Initially, the small-signal model of the LLC converter under PFM and PSM modulation modes is established using extended describing function method. Then, by introducing an intermediate control quantity and aiming for consistent model gain variation rates, the intermediate function is solved to obtain the unified model of the LLC resonant converter. Finally, based on this unified model, a PI controller is designed, and an experimental platform is constructed to validate its effectiveness. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Signal modulation

来源：评论

学校读者我要写书评

暂无评论

Synergistic promotion of particulate matter reduction and production performance via adjusting electrochemical reactions in the zinc electrolysis industry

引用

Frontiers of Environmental science & engineering 2024年第1期18卷 23-33页

作者： Zizhen Ma Jingkun Jiang Lei Duan Jianguo Deng Fuyuan Xu Zehui Li Linhua Jiang Ning Duan School of Environmental and Municipal Engineering Qingdao University of TechnologyQingdao 266520China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of the EnvironmentTsinghua UniversityBeijing 100084China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China School of Physics Peking UniversityBeijing 100871China

Heavy particulate matter (PM) pollution and high energy consumption are the bottlenecks of hydrometallurgy, especially in the electrolysis process. Therefore, an urgent need is to explore PM reduction methods with production performance co-benefits. This study presents three PM reduction methods based on controlling operating parameters, i.e., lowering electrolyte temperature, H2SO4 concentration, and current density of the cathode. The optimized conditions were also investigated using the response surface methodology to balance the PM reduction effect and Zn production. The results showed that lowering electrolyte temperature is the most efficient, with an 89.0% reduction in the PM generation flux (GFPM). Reducing H2SO4 concentration led to the minimum side effects on the current efficiency of Zn deposition (CEZn) or power consumption (PC). With the premise of non-deteriorating CEZn and PC, GFPM can be reduced by 86.3% at the optimal condition (electrolyte temperature = 295 K, H2SO4 = 110 g/L, current density = 373 A/m^(2)). In addition, the reduction mechanism was elucidated by comprehensively analyzing bubble characteristics, electrochemical reactions, and surface tension. Results showed that lower electrolyte temperature inhibited the oxygen evolution reaction (OER) and compressed gas volume. Lower H2SO4 concentration inhibited the hydrogen evolution reaction (HER) and reduced electrolyte surface tension. Lower current density inhibited both OER and HER by decreasing the reaction current. The inhibited gas evolutions reduced the microbubbles’ number and size, thereby reducing GFPM. These results may provide energy-efficient PM reduction methods and theoretical hints of exploring cleaner PM reduction approaches for industrial electrolysis.

关键词： Zinc electrolysis Particulate matter Energy consumption Operating parameters Bubble characteristic Electrochemical reaction

来源：评论

学校读者我要写书评

暂无评论

A Clustering Method for Retired Power Batteries Using SGA-FCM 11th

A Clustering Method for Retired Power Batteries Using SGA-FC...

引用

11th Frontier Academic Forum of Electrical engineering, FAFEE 2024

作者： Ma, Huihai Song, Yilong Song, Jinpeng Xie, Shihong Kang, Jiayu School of Electrical and Control Engineering Shaanxi University of Science and Technology Xi’an710021 China

ISBN: (纸本)9789819788316

In order to tackle the issue of poor consistency of internal individual parameters in retired electric vehicle batteries, an SGA-FCM amended fuzzy C-means clustering method is proposed. Firstly, select sorting parameters based on the second-step Thevenin equivalent RC circuit model of lithium battery cells to construct a retired battery sorting model and choose the terminal voltage, remaining capacity along with equivalent total resistance of battery cells as the sorting arguments. Secondly, a simple genetic algorithm is introduced to preprocess the initial clustering centers to achieve global optimal sorting based on the sensitivity of traditional FCM to outliers. The final simulation results of algorithm running show that the sorting efficiency and accuracy can be improved in some degree by the SGA-FCM, and the static and dynamic properties of the new battery modules after sorting also meet the national standards requirements, which means that the consistency of batteries can be effectively guaranteed. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

Research on control Strategies for Partially Observable Discrete Event Systems Based on Normal State Tree Structure 24

Research on Control Strategies for Partially Observable Disc...

引用

5th International Conference on Computer science and Management Technology, ICCSMT 2024

作者： Gu, Chan Tang, Bo Chi, Encheng School of Electrical and Control Engineering Shaanxi University of Science and Technology Shaanxi Xi'an China

ISBN: (纸本)9798400709999

In the process of modeling and solving large-scale complex systems, issues with complex state structures and low computational efficiency are often *** partially observable discrete event systems, this paper proposes a method that utilizes state tree structures for modeling and analyzes global behavior through local *** demonstrates the existence of non-blocking, weakly controllable coreachable and observable (WCCO) subpredicates and their solving *** order to effectively represent these complex system states, the paper employs the use of Binary Decision Diagrams (BDD), which are capable of compactly and efficiently representing state tree *** feasibility of the proposed algorithm is verified through practical examples, showing that the algorithm exhibits higher fault tolerance and flexibility in handling complex systems, enabling the development of more forgiving control *** not only enhances the stability and reliability of the system but also provides new solutions for supervisory control in practical engineering applications. © 2024 Copyright held by the owner/author(s). Publication rights licensed to ACM.

关键词： Binary decision diagrams

来源：评论

学校读者我要写书评

暂无评论

One developed finite element model used in nano-layered flaky Ti_(2)AlC MAX ceramic particles reinforced magnesium composite

引用

Journal of Magnesium and Alloys 2024年第10期12卷 4219-4228页

作者： Wantong Chen Jingyu Yang Wenbo Yu Yishi Su Ang Zhang Chaosheng Ma Yihu Ma Center of Materials Science and Engineering School of Mechanical and Electronic Control EngineeringBeijing Jiaotong UniversityBeijing 100044China State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China National Engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400044China

As one novel reinforcement used in magnesium composite,nano-layered flaky ternary MAX particle exhibits interesting anisotropic ceramic and metal *** order to accurately simulate the mechanical properties and damage behavior of MAX particle reinforced magnesium composite,we developed one finite element(FE)model based on 2D and 3D microstructural observations of 10 vol.%Ti_(2)AlC-AZ91D *** improve the accuracy,matrix ductile damage,particle internal delamination deformation behaviors,and particle-matrix interfacial behaviors were respectively introduced into this *** visual deformation processes of crack generation and propagation were carefully presented and *** effects of interfacial strength and particle orientation on material properties were systematically investigated.

关键词： MAX phases Mg composites Mechanical properties Damage behavior FE method

来源：评论

学校读者我要写书评

暂无评论

Vortex clusters and their active control in a cold Rydberg atomic system with PT-symmetric Bessel potential

引用

Chinese Physics B 2024年第12期33卷 180-186页

作者： Zhuo Fan Yi Shi Hang Wang Yuan Zhao Wei Peng Siliu Xu Key Laboratory of Optoelectronic Sensing and Intelligent Control Hubei University of Science and TechnologyXianning 437100China School of Biomedical Engineering and Imaging Xianning Medical CollegeHubei University of Science and TechnologyXianning 437100China School of Electronic and Information Engineering Hubei University of Science and TechnologyXianning 437100China

We propose an approach for generating robust two-dimensional(2D)vortex clusters(VCs)in a Rydberg atomic system by utilizing parity-time(PT)symmetric optical Bessel *** show that the system supports novel multicore VCs with four and eight cores,corresponding to topological charges 2 and 4,*** stability of these VCs can be dynamically adjusted through the manipulation of the gain-loss component,Kerr nonlinearities,and the degree of nonlocality inherent in the Rydberg *** VCs are confined within the first lattice well of the Bessel potential,and both the power and width of lights undergo a quasi-periodic breathing phenomenon,which is attributed to the power exchange between the light fields and Bessel *** self-attractive and self-repulsive Kerr interactions can sustain robust VCs within this *** insights presented here not only facilitate the creation and manipulation of 2D VCs through PT-symmetric potentials but also pave the way for potential applications in optical information processing and transmission.

关键词： vortex clusters PT symmetry Bessel potential Rydberg-Rydberg interaction

来源：评论

学校读者我要写书评

暂无评论

Carbonyl-amine condensation coupled ozonolysis of dipropylamine and styrene:Decay kinetics,reaction mechanism,secondary organic aerosol formation and cytotoxicity

引用

Journal of Environmental sciences 2025年第3期149卷 444-455页

作者： Wanying Li Jiangyao Chen Qinhao Lin Yuemeng Ji Taicheng An Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Oxidation of organic amines(OAs)or aromatic hydrocarbons(AHs)produces carbonyls,which further react with OAs to form carbonyl-amine condensation products,threatening environmental quality and human ***,there is still a lack of systematic understanding of the carbonyl-amine condensation reaction processes of OAs or between OAs and AHs,and subsequent environmental health *** work systematically investigated the carbonyl-amine condensation coupled ozonolysis kinetics,reaction mechanism,secondary organic aerosol(SOA)formation and cytotoxicity fromthe mixture of dipropylamine(DPA)and styrene(STY)by a combined method of productmass spectrometry identification,particle property analysis and cell exposure *** results from ozonolysis of DPA and STY mixture revealed that STY inhibited the ozonolysis of DPA to different degrees to accelerate its own decay *** barycenter of carbonyl-amine condensation reactionswas shifted from inside of DPA to between DPA and STY,which accelerated STY ozonolysis,but slowed down DPA *** the first time,ozonolysis of DPA and STY mixture to complex carbonyl-amine condensation products through the reactions of DPA with its carbonyl products,DPA with STY’s carbonyl products and DPA’s bond breakage product with STY’s carbonyl products was *** condensation products significantly contributed to the formation and growth of *** SOA containing particulate carbonyl-amine condensation products showed definite *** findings are helpful to deeply and comprehensively understand the transformation,fate and environmental health effects of mixed organics in atmospheric environment.

关键词： Organic amines(OAs) Aromatic hydrocarbons(AHs) Coupled ozonolysis Carbonyl-amine condensation Secondary pollution Toxicity assessment

来源：评论

学校读者我要写书评

暂无评论

Situation Awareness Based Continuous Time Learning Process and Convergence Analysis 7th

Situation Awareness Based Continuous Time Learning Process a...

引用

7th Chinese Conference on Swarm Intelligence and Cooperative control, CCSICC 2023

作者： Wang, Yanghao Wang, Dong Lian, Jie Xu, Xiaopeng Lian, Lei School of Control Science and Engineering Dalian University of Technology Dalian116000 China

ISBN: (纸本)9789819733316

In multi-agent Markov Games (MGs), the constantly changing strategies of individual agents can lead to the problem of non stationarity. Therefore, it is necessary to design learning processes for agents to find equilibrium strategies. This paper models the optimization process of agent strategies as a dynamic process and proposes a Nash equilibrium strategy learning process based on situation awareness. It is proved that the agents’ strategies in this learning process can converge to the neighborhood of a Nash equilibrium based on local observations. By using situation awareness in the process of strategy updates, the understanding can be improved for each agent in the game. Then, this paper proposes a multi-agent reinforcement learning algorithm based on situation awareness by discretizing the continuous time learning process. The convergence and efficiency of the algorithm are verified through simulations in the Starcraft Multi-Agent Challenge (SMAC). © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Reinforcement learning

来源：评论

学校读者我要写书评

暂无评论

Green disposal of waste smartphone protective film:Efficiency,mechanism,bench-scale test and secondary waste reutilization

引用

Journal of Environmental sciences 2025年第5期151卷 692-702页

作者： Jiangyao Chen Shunyu Ding Chenxu Gao Canhui Chen Taicheng An Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

The manufacture and obsolescence of smartphones produce numerous waste plastic accessories(e.g.,waste smartphone protective film(WSPF)),possessing immense potential for ***,available recycling technologies have limitations such as substrate damage and secondary pollutant *** present study aimed to develop a green disposal method that not only recycled polyethylene terephthalate(PET)from WSPF,but also reused the stripped polyacrylate(PAA)adhesive as an adsorbent to reduce solid waste *** the WSPF was treated in 1 mol/L NaOH solution at 90°C,the PAA hydrolyzed to two main by-products of 1-butanol and 2-ethylhexanol,weakening the binding strength between PAA and PET and then efficient separation of *** bench-scale test revealed that over 97.2%of detachment efficiency toward PAA was achieved during continuous treatment of 17 batches of WSPF(200 g for each)without supplement of NaOH and generation of ***,the economic evaluation indicated that the recycling method would generate a net profit margin of 647%for the second year without considering the incurrence of new cost and ***,the pyrolysis of waste PAA enabled its conversion into potential adsorbent,which showed 2 to 4 times enhanced adsorption capacity toward styrene and ethyl acetate after modification with NaOH *** study provides a green method for recycling waste plastics and inspires a referable solution for solid waste treatment in the smartphone industry.

关键词： Smartphone accessory Waste protective film Green recycle Polyethylene terephthalate Polyacrylate Adsorbent

来源：评论

学校读者我要写书评

暂无评论

Bipartite consensus for nonlinear time-delay multiagent systems via time-varying gain control method

引用

control Theory and Technology 2022年第4期20卷 504-513页

作者： Haiou Zhao Yanan Qi Yanjie Chang Xianfu Zhang School of Control Science and Engineering Shandong UniversityJinan 250061ShandongChina

The bipartite consensus problem is addressed for a class of nonlinear time-delay multiagent systems in this ***,the uncertain nonlinear dynamics of all agents satisfy a Lipschitz growth condition with unknown constants,and part of the state information cannot be *** this case,a time-varying gain compensator is constructed,which only utilizes the output information of the follower and its ***,a distributed output feedback control protocol is proposed on the basis of the *** to Lyapunov stability theory,it is proved that the bipartite consensus can be guaranteed by means of the designed control *** from the existing literature,this paper studies the leader-follower consensus problem under a weaker connectivity condition,i.e.,the signed directed graph is structurally balanced and contains a directed spanning *** simulation examples are carried out to show the feasibility of the proposed control strategy.

关键词： Multiagent systems Time-delay Bipartite consensus Time-varying gain Output feedback

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：