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国际医学放射学杂志 2024年第3期 380-380页

作者： X.Han M.Wang Y.Zheng N.Wang Y.Wu c.ding 余芸菲

摘要目的研究Δ影像组学特征能否预测非小细胞肺癌（NScLc）病人对新辅助化疗免疫治疗的主要病理反应（MPR）。方法纳入来自3个机构（数据库1有164例；数据

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A Novel Melt Processing for Mg Matrix composites Reinforced by Multiwalled carbon Nanotubes

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Journal of Materials Science & Technology 2016年第12期32卷 1303-1308页

作者： H.L.Shi X.J.Wang c.L.Zhang c.D.Li c.ding K.Wu X.S.Hu School of Materials Science and Engineering Harbin Institute of Technology

carbon nanotubes（cNTs） reinforced Mg matrix composites were fabricated by a novel melt processing.The novel processing consisted of two courses：cNTs pre-dispersion and ultrasonic melt processing.Mechanical ball-milling was employed to pre-disperse cNTs on Zinc（Zn） flakes.Serious cNT entanglements were well dispersed to single cNT or tiny clusters on Zn flakes.The ultrasonic melt processing further dispersed cNTs in the Mg melt,especially tiny cNT clusters.Thus,a uniform dispersion of cNTs was achieved in the as-cast composites.Hot extrusion further improved the distribution of cNTs.cNTs increased both the strength and elongation of the matrix alloy.Notably,the elongation of the matrix alloy was enhanced by 40%.Grain refinement and the pulling-out of cNTs resulted in the evident improvement of ductility for the composites.

关键词： Pre-dispersion carbon nanotubes Magnesium matrix composites Ultrasonic

A LOWER BOUND OF STABLE STATIONARY TRAJEcTORIES

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Acta Mathematica Scientia 2007年第3期27卷 535-540页

作者： J.M. Soriano c. ding Departamento de Andlisis Matemdtico Facultad de Matematicas Universidad de Sevilla Aptdo. 1160 Sevilla 41080 Spain Department of Applied Mathematics Zhejiang University of Technology Hangzhou 310032 China

It is proven that an autonomous system verifying some conditions has at least one stable stationary trajectory and it is also given a lower bound to the number of unstable stationary trajectorlies.

关键词： Autonomous system continuation methods trajectory nondegenerate critical point zero point stationary trajectory stable trajectory asymptotically stable Morse inequalities

基于术前甲状腺乳头状癌多模态超声的列线图预测中央区淋巴结转移

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国际医学放射学杂志 2022年第5期 612-613页

作者： Q.Dai D.M.Liu Y.Tao c.ding S.Q.Li c.Zhao 谢永生

摘要目的基于甲状腺乳头状癌和颈部淋巴结的术前临床和多模态超声特征构建列线图预测中央区淋巴结转移（cLNM）。方法该回顾性研究共纳入822例甲状腺乳头状癌

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Less-Defect Perovskite Nanocrytals: Optical Properties and Application to Solar cells

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Less-Defect Perovskite Nanocrytals: Optical Properties and A...

等离子喷涂Sm_2Zr_2O_7热障涂层的高温时效行为以及有序-无序相变

第六届新型太阳能电池材料科学与技术学术研讨会

作者： F.Liu Y.Zhang c.ding T.Toyoda S.Hayase Q.Shen Faculty of Informatics and Engineering The University of Electro-Communications

Perovskite quantum dots(QDs) as a new type of colloidal nanocrystals have gained significant attention for both fundamental research and commercial applications owing to their appealing optoelectronic properties and excellent chemical processability.1 For their wide range of potential applications, synthesizing colloidal QDs with high crystal

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来源： cnki会议评论

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热喷涂技术 2012年第2期4卷 47-52页

作者： S.Wao J.Yu H.Zhao X.Zhou c.ding Shanghai/cN 彭浩然(译) 张鑫(校) 不详

烧绿石结构的稀土锆酸盐材料是新型热障涂层的潜在候选材料之一,能进一步提升涡轮发动机使用寿命和可靠性。通过大气等离子体喷涂技术制备了Sm2Zr2O7热障涂层,并对其显微结构和相组成进行表征。Sm2Zr2O7涂层表现出阴离子无序和阳离子有... 详细信息

烧绿石结构的稀土锆酸盐材料是新型热障涂层的潜在候选材料之一,能进一步提升涡轮发动机使用寿命和可靠性。通过大气等离子体喷涂技术制备了Sm2Zr2O7热障涂层,并对其显微结构和相组成进行表征。Sm2Zr2O7涂层表现出阴离子无序和阳离子有序的萤石相结构特征。经过高温热处理后,涂层结构的向有序方向转变。当热处理温度超过1200℃时,涂层转变为有序的烧绿石结构。热处理温度升高造成涂层中微裂纹的愈合,导致Sm2Zr2O7涂层典型的片层结构特征消失。

关键词：离子体喷涂 Sm2Zr2O7,热障涂层高温时效行为有序-无序相变

Whittle’s Index Based Sensor Scheduling for Multiprocess Systems Under DoS Attacks

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Journal of Systems Science & complexity 2024年第1期37卷 329-350页

作者： cAI Zai ding Kemi Shenzhen Key Laboratory of control Theory and Intelligent Systems Southern University of Science and TechnologyShenzhen 518055China.

In this paper,the authors consider how to design defensive countermeasures against DoS attacks for remote state estimation of multiprocess systems.For each system,a sensor will measure its state and transmits the data packets through an unreliable channel which is vulnerable to be jammed by an attacker.Under limited communication bandwidth,only a subset of sensors are allowed for data transmission,and how to select the optimal one to maximize the accuracy of remote state estimation is the focus of the proposed work.The authors first formulate this problem as a Markov decision process and investigate the existence of optimal policy.Moreover,the authors demonstrate the piecewise monotonicity structure of optimal policy.Given the difficulty of obtaining an optimal policy of large-scale problems,the authors develop a suboptimal heuristic policy based on the aforementioned policy structure and Whittle’s index.Moreover,a closed form of the indices is derived in order to reduce implementation complexity of proposed scheduling policy and numerical examples are provided to illustrate the proposed developed results.

关键词： DoS attacks Kalman filter remote state estimation Whittle’s index.

constraint on the focal mechanism of the 2011 Tohoku earthquake from the radial modes

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Geodesy and Geodynamics 2024年第1期15卷 27-32页

作者： Weikun chen Hao ding School of Geodesy and Geomatics Hubei LuoJia LaboratoryWuhan UniversityWuhan 430079China

Different from other normal modes of the Earth’s free oscillation that depend on all the six components(M_(rr),M_(tt),M_(pp),M_(rt),M_(rp),and M_(tp))of the centroid moment tensor,the amplitudes of the radial modes depend on the M_(rr)component(e.g.,scalar moment(M_(0)),dip(δ),and slip(λ))and hypocenter depth of the focal mechanism,and hence can be easily used to constrain these parameters of the focal mechanism.In this study,we use the superconducting gravimeter(SG)records after the 2011 Tohoku earthquake to analyze the radial modes_(0)S_(0)and_(1)S_(0).Based on the solutions of the focal mechanism provided by the GcMT and USGS,we can obtain the theoretical amplitudes of these two radial modes.comparing the theoretical amplitudes with the observation amplitudes,it is found that there are obvious differences between the former and the latter,which means that the GcMT and USGS focal mechanisms cannot well represent the real focal mechanism of the 2011 event.Taking the GcMT solution as a reference and changing the depth and the three parameters of the M_(rr)moment,the scalar moment(M_(0))and the dip(δ)have significant influences,but the effects of the slip(λ)and the depth are minor.After comparisons,we provide a new constraint(M_(0)=5.8±0.09×10^(22)N·m,δ=10.1±0.08°,λ=88°,and depth=20 km)for the focal mechanism of the 2011 event.In addition,we further determine the center frequency(1.631567±2.6e^(-6)mHz)and quality factor(2046.4±50.1)of the_(1)S_(0)mode.

关键词： Focal mechanism Radial modes Gravity observation

catalysis by subsurface metal atoms in Al(001) through electron transfer

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National Science Review 2024年第4期11卷 12-13页

作者： Bo Sun ding Ma Beijing National Laboratory for Molecular Science New Cornerstone Science Laboratory College of Chemistry and Molecular Engineering Peking University

Heterogeneous catalysis plays a crucial role in the chemical industry, which has evolved from the investigation of chemisorption to an electronic structure[1]. Diverse strategies, such as alloying,doping, and confining, have been applied to enhance the catalytic properties of active sites through electronic modulation. The electron transfer between active sites and substrates profoundly influences catalytic activity [2].

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A vertical track nonlinear energy sink

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Applied Mathematics and Mechanics(English Edition) 2024年第6期45卷 931-946页

作者： Meng LI Hu ding Shanghai Key Laboratory of Mechanics in Energy Engineering School of Mechanics and Engineering ScienceShanghai Frontier Science Center of MechanoinformaticsShanghai UniversityShanghai 200444China

Eliminating the effects of gravity and designing nonlinear energy sinks(NESs)that suppress vibration in the vertical direction is a challenging task with numerous damping requirements.In this paper,the dynamic design of a vertical track nonlinear energy sink(VTNES)with zero linear stiffness in the vertical direction is proposed and realized for the first time.The motion differential equations of the VTNES coupled with a linear oscillator(LO)are established.With the strong nonlinearity considered of the VTNES,the steady-state response of the system is analyzed with the harmonic balance method(HBM),and the accuracy of the HBM is verified numerically.On this basis,the VTNES prototype is manufactured,and its nonlinear stiffness is identified.The damping effect and dynamic characteristics of the VTNES are studied theoretically and experimentally.The results show that the VTNES has better damping effects when strong modulation responses(SMRs)occur.Moreover,even for small-amplitude vibration,the VTNES also has a good vibration suppression effect.To sum up,in order to suppress the vertical vibration,an NES is designed and developed,which can suppress the vertical vibration within certain ranges of the resonance frequency and the vibration intensity.

关键词： track nonlinear energy sink(TNES) vertical direction gravity nonlinear stiffness harmonic balance method(HBM) vibration control