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Comprehensive Assessment of STGSA Generated Skeletal Mechanism for the Application in Flame-Wall Interaction and Flame-Flow Interaction

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Journal of Thermal Science 2024年第5期33卷 1946-1960页

作者： YU Chunkan yang Bin Institute of Technical Thermodynamics Karlsruhe Institute of TechnologyKarlsruhe 76131Germany Center for Combustion Energy Tsinghua UniversityBeijing 100084China

In this study,we conduct a thorough evaluation of the STGSA-generated skeletal mechanism for C_(2)H_4/*** STGSA-reduced mechanisms are taken into account,incorporating basic combustion models such as the homogeneous reactor model,one-dimensional flat premixed flame,and non-premixed counterflow ***,these models are applied to more complex combustion systems,considering factors like flame-flow interaction and flame-wall *** considerations take into account additional physical parameters and processes such as mixing frequency and *** results indicate that the skeletal mechanism adeptly captures the behavior of these complex combustion ***,it is suggested to incorporate strain rate considerations in generating the skeletal mechanism,especially when the combustion system operates under high turbulent intensity.

关键词： Species-Targeted Global Sensitivity Analysis(STGSA) mechanism reduction Partially Stirred Reactor(PaSR) spark ignition Head-on Quenching(HoQ)

Sparse Reconstructive Evidential Clustering for Multi-View Data

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 459-473页

作者： Chaoyu Gong yang You School of Computing National University of SingaporeSingapore

Although many multi-view clustering(MVC) algorithms with acceptable performances have been presented, to the best of our knowledge, nearly all of them need to be fed with the correct number of clusters. In addition, these existing algorithms create only the hard and fuzzy partitions for multi-view objects,which are often located in highly-overlapping areas of multi-view feature space. The adoption of hard and fuzzy partition ignores the ambiguity and uncertainty in the assignment of objects, likely leading to performance degradation. To address these issues, we propose a novel sparse reconstructive multi-view evidential clustering algorithm(SRMVEC). Based on a sparse reconstructive procedure, SRMVEC learns a shared affinity matrix across views, and maps multi-view objects to a 2-dimensional humanreadable chart by calculating 2 newly defined mathematical metrics for each object. From this chart, users can detect the number of clusters and select several objects existing in the dataset as cluster centers. Then, SRMVEC derives a credal partition under the framework of evidence theory, improving the fault tolerance of clustering. Ablation studies show the benefits of adopting the sparse reconstructive procedure and evidence theory. Besides,SRMVEC delivers effectiveness on benchmark datasets by outperforming some state-of-the-art methods.

关键词： Evidence theory multi-view clustering(MVC) optimization sparse reconstruction

An improved initial rotor position estimation method using high-frequency pulsating voltage injection for PMSM

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Defence Technology（防务技术） 2024年第3期33卷 19-29页

作者： yang Jiang Ming Cheng School of Electrical Engineering Southeast UniversityNanjing 210096China

High frequency pulsating voltage injection method is a good candidate for detecting the initial rotor position of permanent magnet synchronous ***,traditional methods require a large number of filters,which leads to the deterioration of system stability and dynamic *** order to solve these problems,a new signal demodulation method is proposed in this *** proposed new method can directly obtain the amplitude of high-frequency current,thus eliminating the use of filters,improving system stability and dynamic performance and saving the work of adjusting filter *** addition,a new magnetic polarity detection method is proposed,which is robust to current measurement ***,experiments verify the effectiveness of the method.

关键词： Initial position detection Signal demodulation algorithm Magnetic polarity detection Filter elimination

Theoretical study on the synergistic mechanism of Fe–Mn in sodium-ion batteries

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Particuology 2024年第10期93卷 284-290页

作者： yang You Mingliang Yuan School of Mineral Processing and Bioengineering Central South UniversityChangsha410083China

This article conducts first-principles calculations to initially explore the construction of two configurations,NaFeO_(2)(NFO)and NaMnO_(2)(NMO),and studies the mixing enthalpies under different Fe–Mn *** results indicate that NaFe3/8Mn5/8O_(2)(NFMO)exhibits the most thermodynamically stable *** calculations on the mixing enthalpies and volume changes during the sodium extraction process for NFO,NMO,and NFMO configurations are presented,along with the partial density of states(PDOS)and Bader charges of transition metals(TM)and *** calculations reveal the synergistic mechanism of Fe and *** and Mn can engage in more complex electron exchanges during sodium extraction,optimizing the internal electron density distribution and overall charge balance,thereby stabilizing the crystal structure and reducing the migration of Fe^(3+)to the sodium layers during deep sodium *** interaction between Fe’s 3d electrons and Mn’s 3d electrons through the shared oxygen atoms’2p orbitals occurs in the Fe–Mn–O *** interaction can lead to a rebalancing of the electron density around Mn³⁺atoms,mitigating the asymmetric electron density distribution caused by the d4 configuration of the lone Mn³⁺and suppressing the Jahn-Teller effect of Mn^(3+).Moreover,the synergistic effects between Fe and Mn can provide a more balanced charge distribution,reducing extreme changes to the charge state of oxygen atoms and decreasing the irreversible oxygen release caused by anionic redox reactions during deep sodium extraction,thereby enhancing the material’s *** in-depth study of the interaction mechanism at the microscopic level when co-doping Fe and Mn offers valuable insights for the rational design and development of high-performance cathode materials.

关键词： First-principles calculations Sodium-ionbatteries Layered oxides NaFe_(3/8)Mn_(3/8)O_(2)

基于Hough变换和圆形模板的棋盘格角点检测

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激光与光电子学进展 2020年第18期57卷 352-359页

作者：杨炜松郭帅平李学军李鸿光湖南科技大学机械设备健康维护湖南省重点实验室湖南湘潭411201

针对现有棋盘格角点检测算法存在精度不足的问题,提出一种基于Hough变换和圆形模板的高精度棋盘格角点检测算法:首先,利用Hough变换和棋盘格直线分布特征获取有效直线,构建棋盘格角点,实现角点的粗略定位;其次,构建圆形模板,使其在粗略... 详细信息

针对现有棋盘格角点检测算法存在精度不足的问题,提出一种基于Hough变换和圆形模板的高精度棋盘格角点检测算法:首先,利用Hough变换和棋盘格直线分布特征获取有效直线,构建棋盘格角点,实现角点的粗略定位;其次,构建圆形模板,使其在粗略定位的角点周围移动,搜索相关点并获取其图像坐标及其观测距离;最后,最小化多个相关点坐标的实际距离与其观测距离的差值并求解,实现角点的精确定位。实验结果表明,本文提出的棋盘格角点方法与现有方法相比,其标定误差明显减少;在光照不理想时,本文方法可以实现精确检测。该方法为实际摄像机高精度标定应用提供了有力依据。

关键词：机器视觉摄像机标定角点检测 Hough变换圆形模板

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山岭隧道二次衬砌环向裂缝的震害机理

沈阳建筑大学学报（自然科学版） 2013年第1期29卷 86-92页

作者：于媛媛郭迅高波王宁伟杨伟松中国地震局工程力学研究所黑龙江哈尔滨150080 西南交通大学土木工程学院四川成都610031 沈阳建筑大学土木工程学院辽宁沈阳110168

目的为深入研究山岭隧道二次衬砌在地震中的受力特征和破坏机制,解释衬砌结构环向裂缝的产生原因.方法基于应答变位法理论,以汶川地震中受到破坏的龙溪隧道作为研究对象,采用有限元方法研究了山岭隧道二次衬砌沿其轴线方向的地震响应规... 详细信息

目的为深入研究山岭隧道二次衬砌在地震中的受力特征和破坏机制,解释衬砌结构环向裂缝的产生原因.方法基于应答变位法理论,以汶川地震中受到破坏的龙溪隧道作为研究对象,采用有限元方法研究了山岭隧道二次衬砌沿其轴线方向的地震响应规律.结果在隧道内离洞口1 000 m的区域,衬砌结构的轴向拉应变最大值达到了150×10-6,远高于C25级混凝土的极限拉应变,该区域首先发生环向断裂.结论隧道结构的地震响应受其所在岩体受震时发生的相对变位所支配.强烈的地震发生过程中,沿隧道轴线方向的衬砌结构可能承受强烈的拉压作用.当衬砌混凝土的实际应变超过其极限应变时,会发生衬砌结构的环向开裂和混凝土剥落.

关键词：山岭隧道汶川地震应答变位法环向裂缝

二维网格上经纪人模仿引起的自组织分离与聚合

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湖北文理学院学报 2014年第5期35卷 21-23页

作者：杨伟松杨德军江西科技师范大学通信与电子学院江西南昌330013 湖北文理学院教育学院湖北襄阳441053

将"演化的争当少数者博弈"模型(EMG)建立在41×41的二维正方形网格上,格点代表经纪人,连线代表该两相邻经纪人存在联系,每个经纪人被随机分配一个介于0与1之间的基因策略p值。数值模拟结果表明:模型的奖惩比等于或大于1时,随着演化过程... 详细信息

将"演化的争当少数者博弈"模型(EMG)建立在41×41的二维正方形网格上,格点代表经纪人,连线代表该两相邻经纪人存在联系,每个经纪人被随机分配一个介于0与1之间的基因策略p值。数值模拟结果表明:模型的奖惩比等于或大于1时,随着演化过程的进行,系统经纪人倾向于模仿具有极端基因策略值(接近0或1)经纪人的策略,说明极端的决定策略比犹豫策略(接近0.5)的表现要好,能使经纪人获得更大收益;当经纪人策略自组织分离现象出现后,人群-反人群效应更加明显,系统一方人数的变化偏差显著降低,系统资源得到更加有效的利用.而当模型的奖惩比小于1时,即处于困难时期时,中间犹豫策略的表现则比极端策略要好.

关键词： EMG模型二维网格经纪人模仿人群-反人群效应自组织分离与聚合

Recent advances in phenazine-linked porous catalysts toward photo/electrocatalytic applications and mechanism

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Green Energy & Environment 2024年第10期9卷 1518-1549页

作者： yang Liu Yu Zhang Zhao-Di yang Liqiang Jing Heilongjiang Provincial Key Laboratory of CO2 Resource Utilization and Energy Catalytic Materials School of Material Science and Chemical EngineeringHarbin University of Science and Technology Institute of Process Engineering Chinese Academy of Sciences Key Laboratory of Functional Inorganic Materials Chemistry(Ministry of Education) School of Chemistry and Materials Science International Joint Research Center for Catalytic Technology Heilongjiang University

In recent years, porous organic catalysts have been developed and become research hotspots in photo/electrocatalysis due to their inherent pores, high specific surface area, chemical and thermal stability, and diverse functional building blocks. Phenazine-linked organic catalysts,exhibited excellent conjugation, electrical conductivity, chemical, and thermal stability, could bring in N atoms with specific numbers and positions to regulate electron levels, anchor metals, and absorb near-infrared light, which expands solar energy utilization. These advantages of the phenazine-linked catalysts attracted our group and numerous researchers to conduct experimental and computational work on photo/electrocatalytic applications and mechanisms. This review summarizes the recent significant research progress, synthesis methods, photo/electrocatalytic performance, and applications of relative phenazine-linked catalysts. Furthermore, the photo/electrocatalytic mechanism was systematized and summarized by combining experiments and density functional theory calculations simultaneously.

关键词： Phenazine-linked porous catalysts Photo/electrocatalytic applications Catalytic mechanism

Cationic starch microparticles with integrated antibacterial and hemostatic performance

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Science China Technological Sciences 2024年第10期67卷 3235-3246页

作者： SU yang NIU MengXin XU KaiDong XU Chen yang PeiLang HU yang XU Fu-Jian Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology Ministry of Education)Beijing Laboratory of Biomedical MaterialCollege of Materials Science and EngineeringBeijing University of Chemical Technology Department of Burn Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine

It is urgently demanded to develop biomaterials with balanced hemostatic/antibacterial ability and facile preparation methods. In this work, cationic starch microparticles(MSQP), prepared by the facile grafting of microporous starch particles(MS) with tunable quaternized polyethyleneimine, were readily constructed as promising hemostatic materials for integrated antibacterial and hemostatic performance. The cationic grafts not only endowed MSQP with good antibacterial ability, but also benefited from biocompatible MS to achieve favorable biocompatibility. Moreover, in vitro results confirmed the superior hemostatic property of MSQP2(with the medium content of cationic grafts) among three MSQP and pristine MS. After investigating the bloodmaterial interactions of MSQP/MS, the procoagulant mechanism of MSQP2 was revealed that the optimal amount of cationic grafts achieves highly balanced plasma-protein adhesion, platelet adhesion and blood coagulation system. In vivo artery-injury model further demonstrated the superior hemostatic performance of MSQP2 for potential severe hemorrhage. This work sheds light on the design of cationic polymer-based biomaterials for balanced antibacterial and hemostatic functions.

关键词： hemostasis antibacterial cationic polymer microparticles