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Tensile Elastic Behavior of a Zr-Cu-Ag-Al Bulk Metallic Glass

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Journal of Materials Science & Technology 2014年第6期30卷 595-598页

作者： q.P.Cao J.B.Jin q.yu X.D.Wang D.X.Zhang Y.Jiang J.Z.Jiang International Center for New-Structured Materials (ICNSM) State Key Laboratory of Silicon MaterialsDepartment of Materials Science and Engineering Zhejiang University Department of Mechanical Engineering University of Nevada Reno NV 89557 USA State Key Laboratory of Modern Optical Instrumentation Zhejiang University

Tensile elastic behavior of bulk Zr46（Cu4.5/5.5Ag1/5.5）46Al8 metallic glass was experimentally investigated. It exhibited linear and non-linear time-independent elastic deformation with a demarcative stress of approximately 500 MPa within the timescale in the present work, and repeated loading-unloading before yielding did not alter stress-strain relationship. The pure linear elastic strain limit is 0.6%, significantly lower than 2% as generally reported, but still much higher than 0.1% observed for typical crystalline alloys. Deviation from linear elastic behavior at stresses higher than 500 MPa is explained here as a macroscopic manifestation of local fluctuations in elastic strain, which becomes pronounced at stresses higher than the critical value. The occurrence of non-linear elasticity is possibly also related to the sinusoidal relationship between shear stress and atomic displacement.

关键词： Bulk metallic glass Tension test Elastic-plastic deformation

Effect of nitrogen on deposition and field emission properties of boron-doped micro-and nano-crystalline diamond films

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Nano-Micro Letters 2010年第3期2卷 154-159页

作者： L.A.Li S.H.Cheng H.D.Li q.yu J.W.Liu X.Y.Lv State Key Laboratory of Superhard Materials Jilin University

In this paper,we report the effect of nitrogen on the deposition and properties of boron doped diamond films synthesized by hot filament chemical vapor *** diamond films consisting of micro-grains(nano-grains) were realized with low(high) boron source flow rate during the growth *** transition of micro-grains to nano-grains is speculated to be strongly(weekly) related with the boron(nitrogen) flow *** grain size and Raman spectral feature vary insignificantly as a function of the nitrogen introduction at a certain boron flow *** variation of electron field emission characteristics dependent on nitrogen is different between microcrystalline and nanocrystalline boron doped diamond samples,which are related to the combined phase composition,boron doping level and texture *** is an optimum nitrogen proportion to improve the field emission properties of the boron-doped films.

关键词： Chemical vapor deposited diamond film Nitrogen effect Boron doping Microcrystalline Nanocrystalline Electron field emission

Fast magnetic energy dissipation in relativistic plasma induced by high order laser modes

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High Power Laser Science and Engineering 2016年第2期4卷 85-89页

作者： Y.J.Gu q.yu O.Klimo T.Zh.Esirkepov S.V.Bulanov S.Weber G.Korn Institute of Physics of the ASCR Institute of Modern Physics Fudan University FNSPE Czech Technical University in Prague Kansai Photon Science Institute Japan Atomic Energy Agency

Fast magnetic field annihilation in a collisionless plasma is induced by using TEM(1,0) laser pulse. The magnetic quadrupole structure formation, expansion and annihilation stages are demonstrated with 2.5-dimensional particle-in-cell simulations. The magnetic field energy is converted to the electric field and accelerate the particles inside the annihilation plane. A bunch of high energy electrons moving backwards is detected in the current sheet. The strong displacement current is the dominant contribution which induces the longitudinal inductive electric field.

关键词： high order laser mode laser–plasma interaction magnetic annihilation

Tuning the microstructure for superb corrosion resistance in eutectic high entropy alloy

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Journal of Materials Science & Technology 2022年第14期109卷 197-208页

作者： S.Shuang q.yua X.Gao q.F.He J.Y.Zhang S.q.Shi Y.Yang Department of Mechanical Engineering City University of Hong KongKowloon TongKowloonHong KongChina Department of Mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Materials Science and Engineering City University of Hong KongKowloon TongKowloonHong KongChina

In this work,we demonstrate that the corrosion resistance of the FeCrNiCoNb_(0.5) eutectic high entropy alloy(EHEA)can be tuned by controlling the size of its eutectic *** microstructure refinement,the EHEA exhibits a superb corrosion resistance in 1 M NaCl in terms of a very low corrosion current density and an ultra-high transpassviation potential,which outperforms a variety of other HEAs and conventional metals and *** the fundamental level,the microstructure refinement results in a rapid formation of a thick and compact passive film with less Cl-adsorption on the EHEA,which results in significant enhancement in its corrosion *** outcome of our research provides important insights into the design of corrosion resistant chemically complex alloys.

关键词： Eutectic high entropy alloy Passivation Transpassivation potential Microstructure size

Numerical modeling the interaction between externally applied resonant magnetic perturbations and tearing instabilities

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Numerical modeling the interaction between externally applie...

Comparison of quadrupole,Hexapole and Octopole Collision Cell:SlMION Analysis and Experimental Demonstration

第十六届全国等离子体科学技术会议暨第一届全国等离子体医学研讨会

作者： qiming Hu q.yu Bo Rao Ge Zhuang Yonghua Ding Wei Jin Nengchao wang Xiwei Hu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Max-Planck-Institut für Plasmaphysik EURATOM association85748 GarchingGermany

To compare with resonant magnetic perturbations(RMPs) related experimental results observed in J-TEXT tokamak,nonlinear numerical modeling based on reduced MHD equations has been carried *** experimental parameters as input,both the mode locking and mode stabilization by RMPs are also obtained from numerical modeling. Further calculations have been carried out to study the plasma parameters affecting the mode stabilization by RMPs,including the plasma rotation frequency,viscosity,Alfven velocity and the RMP *** is found that the suppression of the tearing mode by RMPs of moderate amplitude is possible for a sufficiently high ratio of plasma rotation velocity to the Alfven speed.A larger plasma viscosity enhances the mode stabilization. In addition,the non-uniform mode rotation frequency,modulated by electromagnetic force(Fern) and viscous force(Fvs),results in the applied RMPs contributing both net stabilizing and braking effect on *** evaluation based on analytical theory shows the applied RMP contributes a dominant stabilizing effect,which are responsible for the suppression of *** dynamics of the first discovered small locked island(SLI) are *** is found that the island is locked at the stabilizing phase and the saturated island width is less than the linear layer *** simulated Mirnov signal indicates the small locked island is likely to be the complete suppression case observed in experiments. The comparisons between the numerical and experimental results are in good agreement.

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Comparison of Quadrupole,Hexapole and Octopole Collision Cel...

基于增强CT深度学习辅助诊断良、恶性腮腺肿瘤：一项多中心研究

第三十五届国际光谱会议

作者： q.yu Y.Gao X.Y.Tian D.Peng J.He W.Hang~* Department of Chemistry and Department of Mechanical and Electrical Engineering Xiamen University Xiamen 361005 China

＜正＞Different multipole collision cells have been widely used in current mass spectrometry for their outstanding performances in transmission and cooling *** them, radio frequency（rf）-only quadrupole,hexapole,and octopole are routinely used in practical *** of their performances has been carried out using an in-house built electrospray time-of-flight mass spectrometry（ESI-TOFMS）,equipped with changable multipole ***-written program has also been developed by SIMION

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国际医学放射学杂志 2023年第6期 746-746页

作者： q.yu Y.q.Ning A.Wang S.Li J.M.Gu q.J.Li 罗宇婷

摘要目的开发基于CT影像的深度学习辅助诊断模型，以帮助放射科医生鉴别良性和恶性腮腺肿瘤。方法回顾性收集573例经组织病理证实的腮腺肿瘤病人，包括来自中

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MicroRNAs as novel molecular targets of green tea polyphenol epigallocatechin-3-gallate(EGCG): relevance and importance to nutrition sciences and cancer prevention

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Food Science and Human Wellness 2024年

作者： yu Li q.Ping Dou Bo Li Yongli Wang Xiushan Wang Hui Guan Dapeng Li Feng Li College of Food Science and Engineering， Shandong Agricultural University Key Laboratory of Food Nutrition and Human Health in Universities of Shandong Barbara Ann Karmanos Cancer Institute， Departments of Oncology， Pharmacology and Pathology， Wayne State University School of Medicine Jinan Vocational College of Nursing

MicroRNAs (miRNAs) are a class of single-stranded and non-coding endogenous RNAs with 18-25 nucleotides in length. By binding to the complementary sequences in the 3’untranslated region (3’UTR) of protein coding genes， miRNAs regulate posttranscriptionally the mRNA expression of target genes and enzymes involved in various biological processes. The application of high-throughput sequencing， bioinformatics analysis， and novel detection methods has high-lighted promising roles of miRNAs as both novel biomarkers for tumor diagnosis and critical regulators involved in almost all stages of carcinogenesis including cancer initiation， promotion and progression. Epigallocatechin-3-gallate (EGCG)， the most investigated active catechin in green tea， has been linked to various health-promoting benefits including chemoprevention and treatment of cancers. In this review， we first present a brief description of EGCG and its major metabolic pathway. It is followed by reviewing the roles of EGCG in the modulation of oncogenic and tumor suppressing miRNAs in some common cancers. These findings suggest that the capacity of EGCG to regulate expression of specific miRNAs provides insights of its new mechanisms of action underlying its chemopreventive and potential beneficial activities against various cancers.

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Nonsolvable Groups with Three Nonlinear Irreducible Character Codegrees

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Chinese Annals of Mathematics,Series B 2024年第2期45卷 173-178页

作者： Dongfang YANG yu ZENG Department of Mathematics Changshu Institute of TechnologyChangshu 215500JiangsuChina

For an irreducible characterχof a?nite group G,the codegree ofχis de-?ned as|G:ker(χ)|/χ(1).In this paper,the authors determine?nite nonsolvable groups with exactly three nonlinear irreducible character codegrees,... 详细信息

关键词： Character codegree Nonsolvable group