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Difference Properties of Riordan Arrays and Their Applications

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Journal of Mathematical Research with Applications 2022年第6期42卷 551-560页

作者： yidong sun Cheng sun Weichen WANG School of Science Dalian Maritime University

In this paper, we consider the difference properties of Riordan arrays. As their applications, we provide some difference identities involving several classical combinatorial sequences such as the generalized Stirling numbers, including Stirling numbers of the first and second kinds and Stirling numbers of type B of the first and second kinds, and Gegenbauer-Humbert-type polynomials.

关键词： Riordan array stirling number stirling number of type B Gegenbauer-Humberttype polynomial

Some Properties of a Class of Refined Eulerian Polynomials

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Journal of Mathematical Research with Applications 2019年第6期39卷 593-602页

作者： yidong sun Liting ZHAI School of Science Dalian Maritime University

Recently, sun defined a new kind of refined Eulerian polynomials, namely,■for n ≥ 1, where Sn is the set of all permutations on {1, 2,..., n}, odes（π） and edes（π） enumerate the number of descents of permutation π in odd and even positions, respectively. In this paper,we obtain an exponential generating function for A_n（p, q） and give an explicit formula for A_n（p, q）in terms of Eulerian polynomials A_n（q） and C（q）, the generating function for Catalan *** certain cases, we establish a connection between A_n（p, q） and A_n（p, 0） or A_n（0, q）, and express the coefficients of A_n（0, q） by Eulerian numbers An,k. Consequently, this connection discovers a new relation between Euler numbersEn and Eulerian numbers An,k.

关键词： Eulerian polynomial Eulerian number Euler number descent alternating permutation Catalan number

Coordinatively unsaturated single Co atoms immobilized on C_(2)N for efficient oxygen reduction reaction

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Nano Research 2023年第2期16卷 2294-2301页

作者： Wenjing Xu yidong sun Jiaqi Zhou Maoqi Cao Jun Luo Haili Mao Pengfei Hu Hongfei Gu Huazhang Zhai Huishan Shang Zhi Cai Energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Key Laboratory of Efficient and Comprehensive Utilization of Biomass-based Agricultural and Forestry Wastes of Qiannan Qiannan Normal University for NationalitiesDuyun 558000China School of Physics and Technology and MOE Key Laboratory of Artificial Micro-and Nano-structuresWuhan UniversityWuhan 430072China School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China School of Physics Beihang UniversityBeijing 100191China Research Institute of Aero-Engine Beihang UniversityBeijing 102206China

Developing cost-effective and high-efficiency oxygen reduction reaction(ORR)catalysts is imperative for promoting the substantial progress of fuel cells and metal-air *** coordination and geometric engineering of single-atom catalysts(SACs)occurred the promising approach to overcome the thermodynamics and kinetics problems in high-efficiency ***,we rationally constructed atomically dispersed Co atoms on porous N-enriched graphene material C_(2)N(CoSA-C2N)for efficient oxygen reduction reaction(ORR).Systematic characterizations demonstrated the active sites for CoSA-C2N is as identified as coordinatively unsaturated Co-N_(2)moiety,which exhibits ORR intrinsic ***,the porous N-enriched graphene framework in C_(2)N could effectively increase the accessibility to the active sites and promote mass transfer rate,contributing to improved ORR ***,CoSA-C_(2)N exhibited superior ORR performance in both acidic and alkaline conditions as well as impressive long-term *** coordination and geometric engineering of SACs will provide a novel approach to advanced catalysts for energy related applications.

关键词： single-atom catalysts unsaturated coordination geometric engineering oxygen reduction reaction porous graphene nitride

Observation of the failure mechanism in Ag_(10)Ge_(15)Te_(75)-based memristor induced by ion transport

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Nano Research 2024年第9期17卷 8431-8437页

作者： Yuwei Xiong Kuibo Yin Weiwei sun Jingcang Li Shangyang Shang Lei Xin Qiyun Wu Xiaoran Gong yidong Xia Litao sun SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of EducationSoutheast UniversityNanjing 210096China College of Engineering and Applied Sciences Nanjing UniversityNanjing 210093China

The solid-electrolyte-based memristors have attracted tremendous attention for the next-generation nonvolatile memory for both logic and neuromorphic ***,they encounter variability performance challenges which originated from the random ionic transport and conductive filaments ***,the electrochemical metallized mechanism associated with ion transport has been ***,the failure mechanism caused by ion transport during cycles is rarely ***,the five stages of failure in the Ag/Ag_(10)Ge_(15)Te_(75)/W memristor are elucidated through ex-situ current-voltage measurements combined with in-situ transmission electron microscopy *** investigation reveals that the migration and enrichment of Ag ions result in the precipitation of Ag_(2)*** formation of Ag_(2)Te hinders the device's ability to maintain its bipolar characteristics and also decreases the resistance value of the high resistance state,thereby reducing the device's switching *** promising results provide important guidance for the future design of structures and the manipulation of ion transport for high-performance memristors.

关键词： Ag10Ge15Te75 in-situ transmission electron microscopy(TEM) failure mechanism

Optimal Nonlinear Robust Sliding Mode Control of an Excitation System Based on Mixed Linear H_(2)/H_(∞) Matrix Inequalities

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Protection and Control of Modern Power Systems 2024年第4期9卷 1-22页

作者： yidong Zou Yunhe Wang Jinbao Chen Wenqing Hu Yang Zheng Wenhao sun Zhihuai Xiao the School of Power and Mechanical Engineering Wuhan UniversityWuhan 430072China

In this paper,an optimal nonlinear robust sliding mode control(ONRSMC)based on mixed H_(2)/H_(∞)linear matrix inequalities(LMIs)is designed for the excitation system in a“one machine-infinite bus system”(OMIBS)to enhance system ***,the direct feedback linearization method is used to establish a mathematical model of the OMIBS incorporating *** is then designed for this model,employing the mixed H_(2)/H_(∞)*** chaos mapping-based adaptive salp swarm algorithm(CASSA)is introduced to fully optimize the parameters of the sliding mode control,ensuring optimal performance under a specified *** demonstrates rapid convergence and reduced like-lihood of falling into local optima during ***,ONRSMC is obtained through inverse transformation,exhibiting the advantages of simple structure,high reliability,and independence from the accuracy of system *** simulation scenarios are employed to validate the effectiveness and robustness of ONRSMC,including mechanical power variation,generator three-phase short circuit,transmission line short circuit,and generator parameter *** results indicate that ONRSMC achieves optimal dynamic performance in various operating conditions,facilitating the stable operation of power systems following faults.

关键词： Excitation sliding mode linear matrix inequality salp swarm algorithm

Tailored ionically conductive graphene oxide-encased metal ions for ultrasensitive cadaverine sensor

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Chinese Chemical Letters 2024年第8期35卷 508-513页

作者： Ying Chen Li Li Junyao Zhang Tongrui sun Xuan Zhang Shiqi Zhang Jia Huang yidong Zou School of Materials Science and Engineering Tongji UniversityShanghai 201804China Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation Translational Research Institute of Brain and Brain-Like IntelligenceShanghai Fourth People’s Hospital Affiliated to Tongji UniversityTongji UniversityShanghai 200434China School of Mechanical Engineering Nantong UniversityNantong 226019China

Intelligent chemical sensors have been extensively used in food safety and environmental assessment,while limited sensitivity and homogeneity bring about huge obstacles to their practical ***,novel ionically conductive sensitive materials were elaborately designed based on metal ion decorated graphene oxide(GO)via a facile and general in-situ spin-coating strategy,where the abundant functional groups(-OH and-COOH)of GO layer could provide natural binding sites for various bivalent metal cations(such as Cu^(2+),Ni^(2+),Zn^(2+),Co^(2+),and Mg^(2+))through coordination and electrostatic *** intercalated metal cations on the layered GO nanosheets can be regarded as charge carriers and complexation with targeted gas(cadaverine,Cad),which is a typical metabolites production and food *** contrast,the designed GO@Cu(Ⅱ)sensor exhibited the optimal sensing performance toward Cad molecules at room temperature,including ultra-low detection limit(ca.3 nL),excellent sensitivity,and rapid low concentration detection rate(only 16 s).Interestingly,the sensor exhibited an irreversible and specific response toward Cad,while it showed a transient and reversible response to other interfering gases,implying its outstanding *** addition,the GO@Cu(Ⅱ)sensor enabled real-time monitoring of the decay progression of cheese,and it exhibited great potential for large-scale production via its excellent *** provides an efficient approach to tailoring intelligent chemical sensors for real-time food safety monitoring and human health warning.

关键词： Graphene oxide Cadaverine monitoring Chemical sensor Ionically conductive Homogeneity

Insights of carbon reduction practices from Winter Olympics 2022

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Science Bulletin 2024年第13期69卷 2034-2037页

作者： Xiaoyong Liao Shuai Zhong Jie Huang Zhu Liu Ayman Elshkaki You Li Lei Shen Yingli He Li An yidong Zhu Wenhao sun Tao Liang Jiaoe Wang Jinwei Dong Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory for Resources Use and Environmental Remediation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory of Regional Sustainable Development Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Department of Earth System Science Tsinghua UniversityBeijing 100084China

Concerns about the carbon emissions of mega-events revolve,mainly due to the impactful demonstration effects they ***,accurate monitoring of these emissions is crucial during such events[1].The Olympic and Paralympic Winter Games Beijing 2022(hereinafter“Winter Olympics 2022”)are recognized as the first Games to pay close attention to a wide range of emissions associated with all stages of the *** of emerging carbon reduction technologies,such as low-carbon materials and technologies,have shown promising effects on efforts to achieve carbon neutrality[2].The impacts of individual measures,such as Olympic infrastructure construction.

关键词： Winter emissions carbon

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应用于风力发电机的永磁双转子电机

电机与控制应用 2015年第4期42卷 58-61页

作者：孙屹东黄坚北京中林清风信息工程技术有限公司北京100080 上海电机系统节能工程技术研究中心有限公司上海200063

永磁双转子电机是由一个定子和内、外二个转子构成的新颖的复合电机,该电机具有异步电动机运行的特点,且兼顾同步电机的电气特性。基于永磁双转子电机这一特点,应用于风力发电机,与传统的风力发电系统相比,具有发电系统简单、维护方便... 详细信息

永磁双转子电机是由一个定子和内、外二个转子构成的新颖的复合电机,该电机具有异步电动机运行的特点,且兼顾同步电机的电气特性。基于永磁双转子电机这一特点,应用于风力发电机,与传统的风力发电系统相比,具有发电系统简单、维护方便等优势,同时可提高发电系统的功率因数、效率和可靠性,并可明显降低风力发电系统的投资费用等。

关键词：永磁双转子电机复合电机风力发电

基于“校企合作”的艺术设计人才培养模式的改革与实践

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装饰 2010年第7期 137-138页

作者：孙以栋金阳浙江工业大学

当下许多高校通过产学研的教学模式对艺术设计类人才进行培养,并通过启动校企合作的制定人才培养方案,校企双方通过共同商议的原则,本着提高设计人才培养质量的目的,以专业课程体系为基础,以项目制为导向,形成"以产促学、以学促研、以... 详细信息

当下许多高校通过产学研的教学模式对艺术设计类人才进行培养,并通过启动校企合作的制定人才培养方案,校企双方通过共同商议的原则,本着提高设计人才培养质量的目的,以专业课程体系为基础,以项目制为导向,形成"以产促学、以学促研、以研促产"三位一体的教学实践平台,逐步形成了理论性与实践性相结合的艺术设计类人才培养模式。

关键词：校企合作产学研模式艺术设计