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Improved Proximal Policy Optimization Algorithm for Sequential Security-constrained Optimal Power Flow Based on Expert Knowledge and Safety Layer

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 742-753页

作者： yanbo Chen Qintao Du Honghai liu Liangcheng Cheng Muhammad Shahzad Younis State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources and School of Electrical&Electronic Engineering North China Electric Power UniversityBeijing 102206China School of Engineering Xining UniversityXining 810008Chinaand Key Laboratory of Smart Operation of New Energy Power SystemMinistry of EducationQinghai UniversityXining 810016China China Electric Power Research Institute Nanjing 210003China National University of Sciences and Technology Islamabad44000Pakistan

In recent years,reinforcement learning(RL)has emerged as a solution for model-free dynamic programming problem that cannot be effectively solved by traditional optimization *** has gradually been applied in the fields such as economic dispatch of power systems due to its strong selflearning and self-optimizing ***,existing economic scheduling methods based on RL ignore security risks that the agent may bring during exploration,which poses a risk of issuing instructions that threaten the safe operation of power ***,we propose an improved proximal policy optimization algorithm for sequential security-constrained optimal power flow(SCOPF)based on expert knowledge and safety layer to determine active power dispatch strategy,voltage optimization scheme of the units,and charging/discharging dispatch of energy storage *** expert experience is introduced to improve the ability to enforce constraints such as power balance in training process while guiding agent to effectively improve the utilization rate of renewable ***,to avoid line overload,we add a safety layer at the end of the policy network by introducing transmission constraints to avoid dangerous actions and tackle sequential SCOPF *** results on an improved IEEE 118-bus system verify the effectiveness of the proposed algorithm.

关键词： Sequential security-constrained optimal power flow(SCOPF) expert experience safety layer renewable energy safe reinforcement learning

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Atomic-resolution investigation of structural transformation caused by oxygen vacancy in La_(0.9)Sr_(0.1)TiO_(3+δ)titanate layer perovskite ceramics

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Journal of Materials Science & Technology 2022年第9期104卷 172-182页

作者： Yang Zhao Yameng Zhu Jinpeng Zhu Hailong Wang Zhuang Ma Lihong Gao yanbo liu Kaijun Yang Yongchun Shu Jilin He Henan Province Industrial Technology Research Institute of Resources and Materials School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China National Key Laboratory of Science and Technology on Materials under Shock and Impact School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

Perovskite functional ceramics have been widely applied for thermal protection owing to their unique physical ***,formation of oxygen vacancies under external stimuli usually limits their performance in practical ***,the mechanism of the effect of oxygen vacancy on the layer structure of perovskite La_(0.9)Sr_(0.1)TiO_(3+δ)was investigated by experiments and first-principles *** experimental results showed that the lattice distortion occurred in oxygen-deficient environment to give a longer c-axis,along with a significant adjustment in the modes of A/B–O bond vibration,resulting in lower *** transmission electron microscopy studies revealed that oxygen vacancies induced localized atomic rearrangements via[TiO_(6)]layer movements to adapt to the lattice *** eventually restructured a part of the layer interfaces by expanding the overlapping projection of atoms in the c-axial *** specific transformation process was described as a compendious process,while geometric phase analysis effectively clarified how oxygen vacancies can inhibit reflectivity on the layer ***,this study provides effective approaches for researching the effects of oxygen vacancy on the physical properties of orthorhombic layer perovskite structures,which may facilitate the development of perovskite-based functional devices.

关键词： Titanate perovskite Oxygen vacancy Atomic rearrangement Optical reflectivity

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Characterization on Modification and Biocompatibility of PCL Scaffold Prepared with Near-field Direct-writing Melt Electrospinning

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Chemical Research in Chinese Universities 2021年第3期37卷 578-583页

作者： CHEN Zhijun HAO Ming QIAN Xiaoming CHEN Wenyang ZENG Ming HUANG Juan LI Ruixin FAN Jintu liu yanbo School of Textile Science and Engineering State Key Laboratory of Separation Membranes and Membrane ProcessesTiangong UniversityTianjin300387P.R.China School of Textile Science and Engineering Key Laboratory of Textile Fiber and ProductMinistry of EducationWuhan Textile UniversityWuhan430200P.R.China Central Laboratory Tianjin300041P.R.China Tianjin Stomatological Hospital Tianjin Key Laboratory of Oral and Maxillofacial Function ReconstructionTianjin300041P.R.China

In this study,orthogonal experiments were designed to explore the optimal process parameters for preparing polycaprolactone(PCL)scaffolds by the near-field direct-writing melt electrospinning(NFDWMES)*** on the optimal process parameters,the PCL scaffolds with different thicknesses,gaps and structures were manufactured and the corresponding hydrophilicities were *** PCL scaffolds were modified by chitosan(CS)and hyaluronic acid(HA)to improve biocompatibility and *** Fourier transform infrared spectroscopy(FTIR)analysis and antibacterial experimental results show that the chitosan and hyaluronic acid adhere to the surface of PCL scaffolds,suggesting that the modification plays a positive role in biocompatibility and antibacterial *** PCL scaffolds were then employed as a carrier to culture *** morphology and distribution of the cells observed by a fluorescence microscope demonstrate that the modified PCL scaffolds have good biocompatibility,and the porous structure of the scaffolds is conducive to adhesion and deep growth of cells.

关键词： Melt electrospinning Near-field direct-writing Tissue engineering scaffold Polycaprolactone Modification

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Antibacterial performance of cationic quaternary phosphonium-modified chitosan polymer in water

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Chinese Chemical Letters 2024年第9期35卷 326-330页

作者： Jinjie Lu Qikai liu Yuting Zhang Yi Zhou yanbo Zhou State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and TechnologyShanghai 200237China

Microbial contamination in water has emerged as a critical concern and thus developing biocide materials for controlling microbial contamination is *** all pathogenic bacteria in water is difficult when using traditional water treatment ***,these bacteria can easily reproduce during pipeline *** this work,a facile and effective chitosan derivative biocide denoted as PCC was developed by grafting with quaternary phosphonium salt(QPS).PCC became positively charged with a wide range of p H and demonstrated antibacterial activity up to 95%and 100%against Escherichia coli and Staphylococcus aureus as model pathogens,*** grafting of QPS may disrupt the cell membrane and lead to bacterial inactivation,as demonstrated by the scanning electron microscopy image and the concentration of intracellular substance *** assay results indicate that PCC achieved good biocompatibility with negligible in vitro *** findings introduce a promising approach for bacterial decontamination due to its low cytotoxicity and high biocidal activity.

关键词： Chitosan Quaternary phosphonium salt Antibacterial performance Antibacterial mechanism Morphology change

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Hierarchically nanostructured Ni O-Co3O4 with rich interface defects for the electro-oxidation of 5-hydroxymethylfurfural

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Science China Chemistry 2020年第7期63卷 980-986页

作者： Yuxuan Lu Chung-Li Dong Yu-Cheng Huang Yuqin Zou yanbo liu Yingying Li Nana Zhang Wei Chen Ling Zhou Hongzhen Lin Shuangyin Wang State Key Laboratory of Chem/Bio-Sensing and Chemometrics Provincial Hunan Key Laboratory for Graphene Materials and DevicesCollege of Chemistry and Chemical Engineeringthe National Supercomputer Centers in ChangshaHunan UniversityChangsha 410082 Department of Physics Tamkang UniversityTaipei 25137 i-LAB Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123

Ni-based electrocatalysts with strong redox abilities are active for the electrochemical oxidation of 5-hydroxymethylfurfural(HMF). Interface engineering is an efficient way to modulate the electronic structure, tune the intermediate adsorption, and expose more active sites. Herein, we increased the concentration of interfacial sites with rich defects in a 3D hierarchical nanostructured NiO-Co3O4 electrocatalyst and investigated its catalytic performance for HMF electro-oxidation. The interface effect created abundant cation vacancies, modulated the electronic properties of Co and Ni atoms, and raised the oxidation state of Ni species. The NiO-Co3O4 catalysts show superb HMF oxidation activities with a low onset potential of 1.28 ***, in-situ surface-selective vibrational spectroscopy of sum-frequency generation was performed to study the reaction pathway during the oxidation process on the electrocatalysts. The current study offers an efficient way to create cation vacancies and proves the decisive role of cation vacancies in catalyzing the HMF electro-oxidation.

关键词： interface effect cation vacancies in-situ vibrational spectroscopy electrochemical biomass conversion 3D hierarchical nanostructure

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HMI触摸屏与TMC控制器在试验机上的应用

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工程与试验 2024年第1期64卷 111-113页

作者：王月明袁庆一刘彦波杨添博王成阳中机试验装备股份有限公司吉林长春130103

触摸屏广泛应用于各种工业设备中,用来控制下位机、设置参数、显示数据、监控设备状态、显示报警信息等,触摸屏的应用可大幅提升工业机械设备的智能化和信息化水平。本文将HMI触摸屏与TMC控制器通过串口RS232通信连接,完美解决了电子蠕... 详细信息

触摸屏广泛应用于各种工业设备中,用来控制下位机、设置参数、显示数据、监控设备状态、显示报警信息等,触摸屏的应用可大幅提升工业机械设备的智能化和信息化水平。本文将HMI触摸屏与TMC控制器通过串口RS232通信连接,完美解决了电子蠕变试验机的现场使用需求,简化了用户操作,简单明了的数据显示和参数设置方式让现场操作更加舒适、高效。

关键词： HMI触摸屏 TMC控制器串口通信

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Air plasma-sprayed high-entropy (Y_(0.2)Yb_(0.2)Lu_(0.2)Eu_(0.2)Er_(0.2))_(3)Al_(5)O_(12) coating with high thermal protection performance

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Journal of Advanced Ceramics 2022年第10期11卷 1571-1582页

作者： Kailun WANG Jinpeng ZHU Hailong WANG Kaijun YANG Yameng ZHU Yubin QING Zhuang MA Lihong GAO yanbo liu Sihao WEI Yongchun SHU Yanchun ZHOU Jilin HE School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China National Key Laboratory of Science and Technology on Materials under Shock and Impact School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China Aerospace Research Institute of Materials&Processing Technology Beijing 100076China

High-entropy rare-earth aluminate(Y_(0.2)Yb_(0.2)Lu_(0.2)Eu_(0.2)Er_(0.2))_(3)Al_(5)O_(12)(HE-RE_(3)Al_(5)O_(12))has been considered as a promising thermal protection coating(TPC)material based on its low thermal conductivity and close thermal expansion coefficient to that of ***,such a coating has not been experimentally prepared,and its thermal protection performance has not been *** prove the feasibility of utilizing HE-RE_(3)Al_(5)O_(12) as a TPC,HE-RE_(3)Al_(5)O_(12) coating was deposited on a nickelbased superalloy for the first time using the atmospheric plasma spraying *** stability,surface,and cross-sectional morphologies,as well as the fracture surface of the HE-RE_(3)Al_(5)O_(12) coating were investigated,and the thermal shock resistance was evaluated using the oxyacetylene flame *** results show that the HE-RE_(3)Al_(5)O_(12) coating can remain intact after 50 cycles at 1200℃ for 200 s,while the edge peeling phenomenon occurs after 10 cycles at 1400℃ for 200 *** study clearly demonstrates that HE-RE_(3)Al_(5)O_(12) coating is effective for protecting the nickel-based superalloy,and the atmospheric plasma spraying is a suitable method for preparing this kind of coatings.

关键词： high-entropy ceramics thermal protection coating(TPC) (Y_(0.2)Yb_(0.2)Lu_(0.2)Eu_(0.2)Er_(0.2))_(3)Al_(5)O_(12)(HE-RE_(3)Al_(5)O_(12)) air plasma spraying thermal protection performance

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The forms of ecological logistics and its relationship under the globalization

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Ecological Economy 2008年第3期4卷 290-298页

作者： Li yanbo liu Songxian Xiamen University of Technology Xiamen 361024P.R.China

The logistics system is a complex ecosystem. Ecological logistics （EL） is development trend of modern logistics, and of important practical significance. Effective use of resources and environmental protection should be put in the top position of logistics development. To strengthen research on logistics ecologization and realize ecological and analyzes their relationship.

关键词： Ecological logistics (EL) Form Ecosystem Globalization

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Excitonic devices based on two-dimensional transition metal dichalcogenides van der Waals heterostructures

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Frontiers of Chemical Science and Engineering 2024年第2期18卷 41-67页

作者： Yulun liu Yaojie Zhu Zuowei Yan Ruixue Bai Xilin Zhang yanbo Ren Xiaoyu Cheng Hui Ma Chongyun Jiang College of Electronic Information and Optical Engineering Nankai UniversityTianjin 300350China School of Physical Science and Technology Tiangong UniversityTianjin 300387China

Excitonic devices are an emerging class of technology that utilizes excitons as carriers for encoding, transmitting, and storing information. Van der Waals heterostructures based on transition metal dichalcogenides often exhibit a type II band alignment, which facilitates the generation of interlayer excitons. As a bonded pair of electrons and holes in the separation layer, interlayer excitons offer the chance to investigate exciton transport due to their intrinsic out-of-plane dipole moment and extended exciton lifetime. Furthermore, interlayer excitons can potentially analyze other encoding strategies for information processing beyond the conventional utilization of spin and charge. The review provided valuable insights and recommendations for researchers studying interlayer excitonic devices within van der Waals heterostructures based on transition metal dichalcogenides. Firstly, we provide an overview of the essential attributes of transition metal dichalcogenide materials, focusing on their fundamental properties, excitonic effects, and the distinctive features exhibited by interlayer excitons in van der Waals heterostructures. Subsequently, this discourse emphasizes the recent advancements in interlayer excitonic devices founded on van der Waals heterostructures, with specific attention is given to the utilization of valley electronics for information processing, employing the valley index. In conclusion, this paper examines the potential and current challenges associated with excitonic devices.

关键词： excitonic devices van der Waals heterostructures transition metal dichalcogenides interlayer excitons valley-Hall effect optoelectronics

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Immunological disturbance effect of exogenous histamine towards key immune cells

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Food Science and Human Wellness 2024年第4期13卷 1856-1863页

作者： Yanan liu Huan Li Chong Wang Shanjun Chen Renjie Lian Weiqiang Wang Linglin Fu yanbo Wang Food Safety Key Laboratory of Zhejiang Province School of Food Science and BiotechnologyZhejiang Gongshang UniversityHangzhou 310018China Jinghai Group Co. Ltd.Rongcheng 264307China Jinhua Jinnian Ham Co. Ltd.Jinhua 321041China School of Food and Health Beijing Technology and Business UniversityBeijing 100048China

Histamine in food has attracted widespread attention due to the potential toxicity and associated health ***,its influences on immunological components,especially the function of key immune cells,are still poorly *** this work,we explored the effects of exogenous histamine on the function of key immune cells such as intestinal epithelial cells,dendritic cells,and T *** results showed that histamine could affect the expression of allergy-related genes in CMT93 cells at a high dose of ***,it’s found that histamine could cause an imbalance in the levels of relevant immune factors secreted by dendritic cells and T cells,especially those related to *** the same time,the proportion of MHC class IIpositive dendritic cells and the proportion of T helper 2(Th2)cells in CD4^(+)T cells increased after histamine *** concluded that the presence of a certain level of histamine in food may affect the expression of allergy-related cytokines,disrupt the balance of the immune homeostasis,and potentially lead to adverse immune *** work demonstrated the importance of including the estimation of histamine’s immune safety in aquatic products rather than merely considering the potential risk of food poisoning.

关键词： Histamine Immunological disturbance Food allergy Immune factor Edible safety

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