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基于MMD的故障可诊断性定量评价方法

控制与决策 2023年第10期38卷 2925-2933页

作者：秦玉峰史贤俊海军航空大学岸防兵学院山东烟台264001

提出一种基于最大均值差异(maximum mean discrepancy,MMD)的故障可诊断性定量评价方法.该方法无需构建任何系统模型,通过度量不同故障模式下测量数据之间的距离定量评价故障可诊断性,适用于结构复杂、不易于建模且能够获取测量数据的... 详细信息

提出一种基于最大均值差异(maximum mean discrepancy,MMD)的故障可诊断性定量评价方法.该方法无需构建任何系统模型,通过度量不同故障模式下测量数据之间的距离定量评价故障可诊断性,适用于结构复杂、不易于建模且能够获取测量数据的复杂系统.首先,将测量数据通过特征核映射到可再生核希尔伯特空间(reproducing kernel Hilbert space,RKHS)中,以MMD作为多元分布距离度量指标,将故障可诊断性定量评价问题转换为多元分布在RKHS中的距离度量问题;然后,利用数学推导分析测量噪声强度对故障可诊断性评价结果的影响;最后,通过仿真实例验证所提出方法的有效性.

关键词：故障可诊断性定量评价最大均值差异可再生核希尔伯特空间多元分布

Electric and Magnetic Field Tunable Rectification and Magnetoresistance in FexGe1−x/Ge Heterojunction Diodes

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Chinese Physics Letters 2011年第10期28卷 220-223页

作者： qin yu-feng YAN Shi-Shen KANG Shi-Shou XIAO Shu-qin LI Qiang DAI Zheng-Kun SHEN Ting-Ting DAI You-Yong LIU Guo-Lei CHEN Yan-Xue MEI Liang-Mo ZHANG Ze School of Physics and National Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100 Department of Physics School of InformationShandong Agricultural UniversityTaian 271018 Department of Materials Science and Engineering Zhejiang UniversityHangzhou 310027

FexGe1−x/Ge amorphous heterojunction diodes with p-FexGe1−x ferromagnetic semiconductor layers are grown on single-crystal Ge substrates of p-type,n-type and intrinsic semiconductors,*** I–V curves of p−Fe_(0.4)Ge_(0.6)/p−Ge diodes only show slight changes with temperature or with magnetic *** the p-Fe_(0.4)Ge_(0.6)/n−Ge diode,good rectification is maintained at room *** interestingly,the I–V curve of the p−Fe0.4Ge0.6/i-Ge diode can be tuned by the magnetic field,indicating a large positive *** resistances of the junctions decrease with the increasing temperature,suggesting a typical semiconductor transport *** origin of the positive magnetoresistance is discussed based on the effect of the electric and magnetic field on the energy band structures of the interface.

关键词： temperature diodes heterojunction

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μC/OS-Ⅱ中内存管理方法的分析及改进

计算机工程 2009年第11期35卷 280-282页

作者：俞勤丰孙涌苏州大学计算机科学与技术学院苏州215006

μC/OS-Ⅱ系统的内存管理采用分区管理的方法,效率较高,但由于其内存块固定,不适用于申请内存块大小变化很大的系统。针对此问题,提出一种简化的自适应动态分配μC/OS-Ⅱ内存的管理方法。实验结果表明,该方法能用于所申请内存块大小变... 详细信息

μC/OS-Ⅱ系统的内存管理采用分区管理的方法,效率较高,但由于其内存块固定,不适用于申请内存块大小变化很大的系统。针对此问题,提出一种简化的自适应动态分配μC/OS-Ⅱ内存的管理方法。实验结果表明,该方法能用于所申请内存块大小变化很大的系统,可满足嵌入式应用对内存快速、高效、可靠的需求。

关键词：实时操作系统内存管理动态内存分配

Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： Xiao Xiang feng Gao yu-Gui Peng Peng Wu Zong-Lin Li Xue-feng Zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states

OJ手性柱分离芳基烷酸类非甾体解热镇痛药的色谱保留特性和拆分机理

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化学学报 2008年第9期66卷 1079-1085页

作者：余勤南峰向瑾梁茂植秦永平四川大学华西医院临床药理研究室成都610041

使用纤维素类手性柱OJ柱,分离布洛芬、依托度酸、非诺洛芬钙、酮洛芬、洛索洛芬等5个芳基烷酸类非甾体解热镇痛药对映体,并通过溶质计量置换保留模型和热力学研究对OJ手性柱手性分离机理进行探讨.结果表明,OJ手性柱可在正相条件下分离... 详细信息

使用纤维素类手性柱OJ柱,分离布洛芬、依托度酸、非诺洛芬钙、酮洛芬、洛索洛芬等5个芳基烷酸类非甾体解热镇痛药对映体,并通过溶质计量置换保留模型和热力学研究对OJ手性柱手性分离机理进行探讨.结果表明,OJ手性柱可在正相条件下分离系列芳基烷酸类非甾体解热镇痛药,对映体的色谱保留和分离度可以通过改变流动相中醇类置换剂和浓度、有机酸性改性剂和浓度、柱温等因素调节.

关键词：高效液相色谱法手性固定相对映体分离非甾体解热镇痛药

MODELING AND EXPERIMENTAL ANALYSES FOR NANO-POSITIONING COMPLIANT MECHANISMS

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MODELING AND EXPERIMENTAL ANALYSES FOR NANO-POSITIONING COMP...

2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： qin yu, feng Zhijing Department of Precision Instruments and Mechanology, Tsinghua University, Beijing, China, 100084

There are non-linear errors, hysteresis errors and so on in the actuators made of piezoelectric ceramics. And these errors are especially conspicuous in the case of large range motion. In this paper,

关键词： Nano-positioning compliant mechanisms finite element method.

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“着”清浊两读与其兼表持续、完成的用法

古汉语研究 2021年第3期 29-44,126页

作者：覃凤余王全华广西大学文学院广西南宁530004 北京语言大学语言科学院北京100083

汉语史"着"有清浊两读,清浊的对立反映为结构和语义上的不同。持续体助词来源于清声母"着",结构为Ⅰa:"V(+N_(受事))+着_(清)+N_(处所)"和Ⅰb:V+着_(清)+N_(处所)(含N_(受事))",语义是"主体发出V,使N受事附着于N_(处所)";完成体助词来... 详细信息

汉语史"着"有清浊两读,清浊的对立反映为结构和语义上的不同。持续体助词来源于清声母"着",结构为Ⅰa:"V(+N_(受事))+着_(清)+N_(处所)"和Ⅰb:V+着_(清)+N_(处所)(含N_(受事))",语义是"主体发出V,使N受事附着于N_(处所)";完成体助词来源于浊声母"着",结构为Ⅱ:"V+着_(浊)+N_(处所)(不含N_(受事))",语义是"主体发出V,然后自己附着于N_(处所)"。由于清浊两读在不同的结构里的语义不同,持续用法和完成用法初始分开的,后来发生了合并。其分与合能在汉语方言和壮侗语中找到旁证。

关键词：着持续完成汉语方言壮侗语

Mainchain conformation ordering self-assembly tailored room temperature phosphorescence emission

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Science China Chemistry 2025年第1期68卷 329-336页

作者： yuzhu Li yumeng Gao feng Tian yu Wang yuan Yao Shaoliang Lin Xiang Ma Binbin Xu Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Key Laboratory for Advance Materials and Feringa Noble Prize Scientist Joint Research Centre Frontiers Science for Materiobiology and Dynamic Chemistry School of Chemistry and Molecular Engineering East China University of Science & Technology

Developing organic room-temperature phosphorescence （RTP） materials with a wide range of tunable-emission is significant in expanding the applications of RTP ***,we rationally designed amphiphilic alternating copolymers poly(1,2-bis（4-alkoxyphenyl）ethane-1,2-dione-alt-（ethylene glycol）x)(P（Bz-alt-EGx）) that combined the advantage of alternating benzil and EGxskeleton,and tunable mainchain *** a mainchain conformation ordering assembly （COA） process,P（Bz-alt-EGx） self-assembled into well-defined platelets,and such assemblies emitted blue RTP at ca.425 nm due to the ordered folded-chain conformation and confined *** contrast,traditional self-assembly （TA） of P（Bz-alt-EGx） obtained less ordered aggregates,such as asymmetric worms,vesicles,and rod-like *** resultant less ordered aggregates exhibited yellow-green RTP at ca.550 *** wide-tuning RTP emission in solution （between blue and yellow-green,over125 nm） is realized using the P（Bz-alt-EGx） alternating copolymers under the treatment of different self-assembly *** study uncovers a new strategy to tailor the RTP emission through different self-assembly pathways and holds great promise for the fabrication of advanced optical materials.

关键词： self-assembly conformation ordering alternating copolymer phosphorescence emission

迁移工作流系统中位置服务体系结构的研究与设计

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计算机应用 2007年第10期27卷 2595-2597,2601页

作者：秦宇锋曾广周山东大学计算机科学与技术学院济南250061

将位置对迁移实例(MI)的服务区分为迁移实例服务和工作流服务,基于多线程设计了一种支持两类服务的体系结构,不仅有效地提高了位置服务的效率,同时增强了位置服务的可扩展性。

关键词：迁移工作流迁移实例位置服务体系结构多线程可扩展性