检索结果-内蒙古大学图书馆

SSRN 2022年

作者： Yan, Fang Guo, Yandong Wang, Zhenlei Zhao, Linlin Zhang, Xiaochun College of Mathematics Science Bohai University Liaoning Jinzhou121013 China Innovation Academy for Green Manufacture Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China College of Chemistry and Chemical Engineering Qingdao University Shandong Qingdao266071 China

Ionic liquids (ILs)/graphene oxide (GO) membranes have been regarded as a prospective alternative in CO2 separation. However, the correlation between the microstructure of ILs/GO and CO2 separation performance is unclear. In this work, the dynamic properties and interactions for CO2/CH4 in 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]), 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]) and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Bmim][TF2N]) confined between two GO sheets with different layer spacings were studied using molecular dynamics simulation. The number density and angular orientation of cations suggest that there is a dense cation adsorption layer near GO with the imidazole rings and alkyl side chains mostly paralleled to GO surface. The strong interaction of GO-cation weakens the interaction of cations-anions, facilitating the adsorption of CO2. The overlapping distribution regions of the number density of CO2/CH4 with the cations and anions reveal that CO2/CH4 mainly distribute around the ILs area of the ILs/GO membrane, which improves the gas selectivity. The RDFs results of CO2/CH4-ILs indicate that the confined ILs/GO system is more favorable for capturing gases than bulk ILs. The stronger interaction of CO2-anions/cations and the faster diffusion of CO2 than CH4 reflect the high dissolution selectivity and diffusion selectivity for CO2/CH4 in ILs/GO membrane. In addition, it was found that increasing the layer spacing would decrease the dissolution selectivity, but could increase the diffusion selectivity. Furthermore, [Bmim][TF2N]/GO membrane is predicted to possess superior CO2/CH4 separation performance than [Bmim][PF6]/GO and [Bmim][BF4]/GO membranes. © 2022, The Authors. All rights reserved.

关键词： Molecular dynamics

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Interpretable Recognition of Fused Magnesium Furnace Working Conditions with Deep Convolutional Stochastic Configuration Networks

arXiv

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arXiv 2025年

作者： Li, Weitao Zhang, Xinru Wang, Dianhui Tong, Qianqian Chai, Tianyou The Department of Electric Engineering and Automation Hefei University of Technology Hefei230009 China The Institute of Artificial Intelligence China University of Mining and Technology Xuzhou221116 China The State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Liaoning Shenyang110004 China

To address the issues of a weak generalization capability and interpretability in working condition recognition model of a fused magnesium furnace, this paper proposes an interpretable working condition recognition method based on deep convolutional stochastic configuration networks (DCSCNs). Firstly, a supervised learning mechanism is employed to generate physically meaningful Gaussian differential convolution kernels. An incremental method is utilized to construct a DCSCNs model, ensuring the convergence of recognition errors in a hierarchical manner and avoiding the iterative optimization process of convolutional kernel parameters using the widely used backpropagation algorithm. The independent coefficient of channel feature maps is defined to obtain the visualization results of feature class activation maps for the fused magnesium furnace. A joint reward function is constructed based on the recognition accuracy, the interpretable trustworthiness evaluation metrics, and the model parameter quantity. Reinforcement learning (RL) is applied to adaptively prune the convolutional kernels of the DCSCNs model, aiming to build a compact, highly performed and interpretable network. The experimental results demonstrate that the proposed method outperforms the other deep learning approaches in terms of recognition accuracy and interpretability. Copyright © 2025, The Authors. All rights reserved.

关键词： Reinforcement learning

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Diverse viromes in polar regions: A retrospective study of metagenomic data from Antarctic animal feces and Arctic frozen soil in 2012–2014

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Virologica Sinica 2022年第6期37卷 883-893页

作者： Jun Wang Jian Xiao Zheng Zhu Siyuan Wang Lei Zhang Zhaojun Fan Yali Deng Zhihong Hu Fang Peng Shu Shen Fei Deng State Key Laboratory of Virology and National Virus Resource Center Wuhan Institute of VirologyChinese Academy of SciencesWuhan 430071China Xinjiang Key Laboratory of Biological Resources and Genetic Engineering College of Life Science and TechnologyXinjiang UniversityUrumqi830046China China Center for Type Culture Collection(CCTCC) College of Life SciencesWuhan UniversityWuhan430072China Natisonal Emerging Infectious Diseases Laboratories Boston UniversityBostonMA 02118United States Department of Biochemistry Boston University School of MedicineBostonMA 02118United States

Antarctica and the Arctic are the coldest places, containing a high diversity of microorganisms, including viruses,which are important components of polar ecosystems. However, owing to the difficulties in obtaining access to animal and environmental samples, the current knowledge of viromes in polar regions is still limited. To better understand polar viromes, this study performed a retrospective analysis using metagenomic sequencing data of animal feces from Antarctica and frozen soil from the Arctic collected during 2012–2014. The results reveal diverse communities of DNA and RNA viruses from at least 23 families from Antarctic animal feces and 16families from Arctic soils. Although the viral communities from Antarctica and the Arctic show a large diversity,they have genetic similarities with known viruses from different ecosystems and organisms with similar viral proteins. Phylogenetic analysis of Microviridae, Parvoviridae, and Larvidaviridae was further performed, and complete genomic sequences of two novel circular replication-associated protein(rep)-encoding single-stranded(CRESS) DNA viruses closely related to Circoviridae were identified. These results reveal the high diversity,complexity, and novelty of viral communities from polar regions, and suggested the genetic similarity and functional correlations of viromes between the Antarctica and Arctic. Variations in viral families in Arctic soils,Arctic freshwater, and Antarctic soils are discussed. These findings improve our understanding of polar viromes and suggest the importance of performing follow-up in-depth investigations of animal and environmental samples from Antarctica and the Arctic, which would reveal the substantial role of these viruses in the global viral community.

关键词： Arctic soil Antarctica animal feces Metagenomics Virus diversity

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Numerical investigation of flow fields in a novel methanol-to-olefins reactor 13

Numerical investigation of flow fields in a novel methanol-t...

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13th International Conference on Fluidized Bed Technology, CFB 2021

作者： Zhang, Chunhua Lu, Bona Wang, Fenfen Wang, Wei Liu, Mengxi Lu, Chunxi State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing102249 China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China

ISBN: (纸本)9781771368506

A novel MTO reactor consisting of two primary reaction regions is numerically investigated using a combination of multi-fluid model and mesoscale drags. The model validation is firstly conducted through the comparison of simulation results and the experimental data in axial/radial profiles of solids hold-up and the external solids flux. Further numerical experiments find that compared to the traditional reactor, an internal circulating flow structure and multiple reaction zones are formed in the novel reactor, which is expected to be favorable for improving MTO reactions. © 2021 CFB 2021 - Proceedings of the 13th International Conference on Fluidized Bed Technology. All rights reserved.

关键词： Fluidized beds

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Ferric Ion Driven Assembly of Catalase-like Supramolecular Photosensitizing Nanozymes for Combating Hypoxic Tumors

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Advanced Materials 2020年第51期59卷 23428-23438页

作者： Li, Yongxin Sun, Pan Zhao, Luyang Yan, Xuehai Ng, Dennis K. P. Lo, Pui-Chi Department of Biomedical Sciences City University of Hong Kong Tat Chee Avenue Hong Kong Kowloon China CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Department of Chemistry The Chinese University of Hong Kong N.T. Hong Kong Shatin China

A facile approach to assemble catalase-like photosensitizing nanozymes with a self-oxygen-supplying ability was developed. The process involved Fe3+-driven self-assembly of fluorenylmethyloxycarbonyl (Fmoc)-protected amino acids. By adding a zinc(II) phthalocyanine-based photosensitizer (ZnPc) and the hypoxia-inducible factor 1 (HIF-1) inhibitor acriflavine (ACF) during the Fe3+-promoted self-assembly of Fmoc-protected cysteine (Fmoc-Cys), the nanovesicles Fmoc- Cys/Fe@Pc and Fmoc-Cys/Fe@Pc/ACF were prepared, which could be disassembled intracellularly. The released Fe3+ could catalyze the transformation of H2O2 enriched in cancer cells to oxygen efficiently, thereby ameliorating the hypoxic condition and promoting the photosensitizing activity of the released ZnPc. With an additional therapeutic component, Fmoc-Cys/Fe@Pc/ACF exhibited higher in vitro and in vivo photodynamic activities than Fmoc-Cys/Fe@Pc, demonstrating the synergistic effect of ZnPc and ACF. © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

关键词： Self assembly

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Electrocatalytic ammonia synthesis catalyzed by mesoporous nickel oxide nanosheets loaded with Pt nanoparticles

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Chinese Journal of Catalysis 2022年第5期43卷 1371-1378页

作者： Wei Xiong Min Zhou Hao Li Zhao Ding Da Zhang Yaokang Lv Key Laboratory for Green Chemical Process(Ministry of Education) Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationHubei Key Laboratory Of Novel Reactor&Green Chemical TechnologySchool of Chemistry and Environmental EngineeringWuhan Institute of TechnologyWuhan 430205HubeiChina Department of Physics Technical University of DenmarkLyngby 2800Denmark The State Key Laboratory of Refractories and Metallurgy Institute of Advanced Materials and NanotechnologyWuhan University of Science and TechnologyWuhan 430071HubeiChina Changjiang River Scientific Research Institute Wuhan 430071HubeiChina College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014ZhejiangChina

Owing to its cost‐effectiveness and adjustable eight‐electron distribution in the 3d orbital,nickel oxide(NiO)is considered an effective electrocatalyst for an ambient electrochemical nitrogen reduction reaction(NRR).However,because of the low conductivity of the transition metal oxide electrocatalyst,its application in this field is *** this study,we found that the doping of NiO nanosheets with a small amount(3–10 nm)of Pt nanoparticles(Pt/NiO‐NSs)leads to considerable improvements in the Faradaic efficiency(FE)and NH_(3) yield compared with those obtained using pure NiO,breaking the common perception that commercial Pt‐based electrocatalysts demonstrate little potential for NRR due to their high hydrogen evolution *** a 0.1 mol/L Na_(2)SO_(4) solution at−0.2 V ***,a typical Pt/NiO‐2 sample exhibits an optimum electrochemical NH_(3) yield of 20.59μg h^(–1)mg^(–1)*** an FE of 15.56%,which are approximately 5 and 3 times greater,respectively,than those of pure NiO nanosheets at the same applied potential.X‐ray photoelectron spectroscopy analysis revealed that Pt in Pt/NiO‐NSs exist as Pt0,Pt^(2+),and Pt^(4+)and that high‐valence Pt ions are more electropositive,thereby favoring chemisorption and the activation of N2 *** function theory calculations showed that the d‐band of Pt nanoparticles supported on NiO is significantly tuned compared to that of pure Pt,affording a more favorable electronic structure for *** results of this study show that Pt can be an effective NRR electrochemical catalyst when loaded on an appropriate *** importantly,it provides a new synthetic avenue for the fabrication of highly active Pt‐based NRR electrocatalysts.

关键词： Platinum nanoparticles NiO nanosheets Nitrogen reduction reaction Electrocatalysis

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Avian influenza viruses suppress innate immunity by inducingtrans-transcriptional readthrough via SSU72

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Cellular & Molecular Immunology 2022年第6期19卷 702-714页

作者： Yan Zhao Fengming Huang Zhen Zou Yuhai Bi Yang Yang Cong Zhang Qiang Liu Daozhen Shang Yiwu Yan Xiangwu Ju Song Mei Peng Xie Xiao Li Mingyao Tian Shuguang Tan Huijun Lu Zongsheng Han Kangtai Liu Yuqing Zhang Junbo Liang Zhu Liang Qingchao Zhang Jiahui Chang William JLiu Cong Feng Tanshi Li Michael Q.Zhang Xiaoyue Wang George FGao Yingxia Liu Ningyi Jin Chengyu Jiang State Key Laboratory of Medical Molecular Biology Institute of Basic Medical SciencesChinese Academy of Medical SciencesDepartment of BiochemistryPeking Union Medical CollegeBeijing 100005China Shenzhen Key Laboratory of Pathogen and Immunity State Key Discipline of Infectious DiseaseSecond Hospital Affiliated with Southern University of Science and TechnologyShenzhen Third People’s HospitalShenzhenGuangdong 518112China CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyCenter for Influenza Research and Early-warning(CASCIRE)CAS-TWAS Center of Excellence for Emerging Infectious Diseases(CEEID)Chinese Academy of SciencesBeijing 100101China School of Life Science University of Science and Technology of ChinaHefeiAnhui 230027China Department of Automation Tsinghua UniversityBeijing 100084China Genetic Engineering Laboratory Institute of Military VeterinaryAcademy of Military Medical SciencesChangchunJilin 130062China State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy West China HospitalSichuan UniversityChengduSichuan 610000China State Key Laboratory of Medical Molecular Biology Department of Biochemistry and Center for BioinformaticsInstitute of Basic Medical SciencesChinese Academy of Medical SciencesSchool of Basic MedicinePeking Union Medical CollegeBeijing 100005China National Institute for Viral Disease Control and Prevention Chinese Centers for Disease Control and PreventionBeijing 102206China Department of Emergency General Hospital of the PLAHaidian DistrictBeijing 100853China Department of Biological Sciences and Center for Systems Biology The University of Texas at DallasRichardsonTXUSA

Innate immunity plays critical antiviral roles. The highly virulent avian influenza viruses (AIVs) H5N1, H7N9, and H5N6 can betterescape host innate immune responses than the less virulent seasonal H1N1 virus. Here, we report a mechanism by whichtranscriptional readthrough (TRT)-mediated suppression of innate immunity occurs post AIV infection. By using cell lines, mouselungs, and patient PBMCs, we showed that genes on the complementary strand (“trans” genes) influenced by TRT were involved inthe disruption of host antiviral responses during AIV infection. The trans-TRT enhanced viral lethality, and TRT abolishmentincreased cell viability and STAT1/2 expression. The viral NS1 protein directly bound to SSU72, and degradation of SSU72 inducedTRT. SSU72 overexpression reduced TRT and alleviated mouse lung injury. Our results suggest that AIVs infection induce TRT byreducing SSU72 expression, thereby impairing host immune responses, a molecular mechanism acting through the NS1-SSU72-trans-TRT-STAT1/2 axis. Thus, restoration of SSU72 expression might be a potential strategy for preventing AIV pandemics.

关键词： AIV infection TRT SSU72 NS1 Immune escape

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Collision/Obstacle Avoidance Dynamic Formation Reconfiguration of High-Order Nonlinear Multi-Agent Systems

Collision/Obstacle Avoidance Dynamic Formation Reconfigurati...

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第35届中国控制与决策会议

作者： Liwei An Weinan Gao Chao Deng Wei-Wei Che College of Information Science and Engineering Northeastern University State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Institute of Advanced Technology Nanjing University of Posts and Telecommunications Department of Automation Qingdao University

Multi-Agent formation involves the motion conflicts of large numbers of physical systems,which leads to significant safety challenges in terms of collision/obstacle *** paper studies the problem of collision/obstacle avoidance formation tracking for a class of high-order strict-feedback nonlinear multiagent systems and presents a dynamic formation reconfiguration ***,a smooth and analytic reference trajectory is constructed,which consists of a convex combination of preset trajectory and delayed target trajectory with its coefficient adaptively adjusted by two barrier functions to avoid ***,a distributed backstepping control scheme with highorder filtering for barrier functions is ***,all agents adaptively reconfigure their formation shape within the barrier function's coverage to avoid collisions with each other and obstacles,while quickly forming a pre-defined shape of formation following the target trajectory outside the barrier function's *** results are given to illustrate the effectiveness of the proposed scheme.

关键词： Formation reconfiguration collision/obstacle avoidance multi-agent systems barrier functions

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Distributed Event-Triggered Bandit Convex Optimization With Time-Varying Constraints

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IEEE Transactions on Control of Network Systems 2025年

作者： Zhang, Kunpeng Yi, Xinlei Wen, Guanghui Cao, Ming Johansson, Karl H. Chai, Tianyou Yang, Tao Northeastern University State Key Laboratory of Synthetical Automation for Process Industries Shenyang110819 China Ministry of Education Shanghai Institute of Intelligent Science and Technology National Key Laboratory of Autonomous Intelligent Unmanned Systems Frontiers Science Center for Intelligent Autonomous Systems Shanghai201210 China Southeast University School of Automation Nanjing210096 China University of Groningen Engineering and Technology Institute Groningen Faculty of Science and Engineering GroningenAG 9747 Netherlands KTH Royal Institute of Technology Division of Decision and Control Systems School of Electrical Engineering and Computer Science Stockholm10044 Sweden KTH Royal Institute of Technology Digital Futures Stockholm10044 Sweden

This paper considers the distributed bandit convex optimization problem with time-varying inequality constraints over a network of agents, where the goal is to minimize network regret and cumulative constraint violation. Existing distributed online algorithms solving this problem require that each agent broadcasts its decision to its neighbors at each iteration. However, communication resources are often limited. To better utilize communication resources, we propose a distributed event-triggered online primal-dual algorithm with two-point bandit feedback. Under several classes of appropriately chosen decreasing parameter sequences and non-increasing event-triggered threshold sequences, we establish dynamic network regret and network cumulative constraint violation bounds. These bounds are comparable to the results achieved by distributed event-triggered online algorithms with full-information feedback. Finally, a numerical example is provided to verify the theoretical results. © 2014 IEEE.

关键词： Optimization algorithms

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In Situ Investigation of Dynamic Silver Crystallization Driven by Chemical Reaction and Diffusion

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Research 2020年第1期2020卷 739-749页

作者： Ting Liu Xiangyu Dou Yonghui Xu Yongjun Chen Yongsheng Han State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of Sciences100190 BeijingChina State Key Laboratory of Marine Resource Utilization in South China Sea Hainan University570228 HaikouChina School of Chemical Engineering University of Chinese Academy of Sciences100049 BeijingChina

Rational synthesis of materials is a long-term challenging issue due to the poor understanding on the formation mechanism of material structure and the limited capability in controlling nanoscale *** emergent in situ electron microscope provides an insight to this *** employing an in situ scanning electron microscope,silver crystallization is investigated in real time,in which a reversible crystallization is *** disclose this reversible crystallization,the radicals generated by the irradiation of electron beam are *** is found that the concentrations of radicals are spatiotemporally variable in the liquid cell due to the diffusion and reaction of *** fluctuation of the reductive hydrated electrons and the oxidative hydroxyl radicals in the cell leads to the alternative dominance of the reduction and oxidation *** reduction leads to the growth of silver crystals while the oxidation leads to their dissolution,which results in the reversible silver crystallization.A regulation of radical distribution by electron dose rates leads to the formation of diverse silver structures,confirming the dominant role of local chemical concentration in the structure evolution of materials.

关键词： silver reversible crystallization

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