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The intermittent excitation of geodesic acoustic mode by resonant Instanton of electron drift wave envelope in L-mode discharge near tokamak edge

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Chinese Physics B 2022年第4期31卷 449-467页

作者： Zhao-yang Liu yang-zhong zhang Swadesh Mitter Mahajan A-Di Liu Chu Zhou Tao Xie Institute for Fusion Theory and Simulation and Department of Physics Zhejiang UniversityHangzhou 310027China Center for Magnetic Fusion Theory Chinese Academy of SciencesHefei 230026China Institute for Fusion Studies University of Texas at AustinAustinTexas 78712USA School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China School of Science Sichuan University of Science and EngineeringZigong 643000China

There are two distinct phases in the evolution of drift wave envelope in the presence of zonal flow.A long-lived standing wave phase,which we call the Caviton,and a short-lived traveling wave phase(in radial direction) we call the *** abrupt phenomena observed in tokamaks,such as intermittent excitation of geodesic acoustic mode(GAM) shown in this paper,could be attributed to the sudden and fast radial motion of *** composite drift wave-zonal flow system evolves at the two well-separate scales:the micro-scale and the *** eigenmode equation of the model defines the zero-order(micro-scale) variation;it is solved by making use of the two-dimensional(2 D) weakly asymmetric ballooning theory(WABT),a theory suitable for modes localized to rational surface like drift waves,and then refined by shifted inverse power method,an iterative finite difference *** next order is the equation of electron drift wave(EDW) envelope(containing group velocity of EDW) which is modulated by the zonal flow generated by Reynolds stress of *** equation is coupled to the zonal flow equation,and numerically solved in spatiotemporal representation;the results are displayed in self-explanatory *** observes a strong correlation between the Caviton-Instanton transition and the zero-crossing of radial group velocity of *** calculation brings out the defining characteristics of the Instanton:it begins as a linear traveling wave right after the ***,it evolves to a nonlinear stage with increasing frequency all the way to 20 *** modulation to Reynolds stress in zonal flow equation brought in by the nonlinear Instanton will cause resonant excitation to *** intermittency is shown due to the random phase mixing between multiple central rational surfaces in the reaction region.

关键词： zonal flow drift wave Instanton L-H mode

Mechanism of counterattack of colorectal cancer cell by Fas/Fas ligand system

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World Journal of Gastroenterology 2005年第39期11卷 6125-6129页

作者： Qiang Zhu Ji-Yong Liu Hong-Wei Xu Chong-Mei yang An-zhong zhang Yi Cui Hong-Bo Wang Department of Gastroenterology Shandong Provincial Hospital Jing 5 Wei 7 Road 324# Jinan 250021 Shandong Province China

AIM： To determine the role of Fas/Fas ligand （FasL） in the immune escape of colon cancer cells. METHODS： Immunohistochemistry was used to observe the expression of Fas and FasL in the tissues of colon cancer patients. In situ hybridization was used to detect the localization of FasL mRNA expression in cancer tissues. Terminal deoxynucleotide transferase-mediated dUTP nick end labeling （TUNEL） assay and CD45 staining were performed to detect the apoptosis of tumor-infiltrating lymphocytes （TILs）. Co-culture assays of colon cancer cells （SW480） and Jurkat cells （Fas-sensitive cells） were performed to observe the counterattack of colon cancer cells to lymphocytes. RESULTS： Of 53 cases of colon carcinomas, 23 cases （43.4%） expressed Fas which was significantly lower as compared to the normal colonic mucosa （73.3%, P〈0.01）, and 45 cases （84.9%） of colon carcinomas expressed FasL, whereas only two cases （3.75%） in normal mucosa expressed FasL. FasL expression in the colon cancer cells was found to be associated with increased cell death of TIEs. The apoptotic rate of TIL in the FasL-positive staining regions of tumor cells was significantly higher than that in the FasL-negative staining region （54.84±2.79% vs 25.73±1.98%, P〈0.01）. The co-culture of SW480 cells and Jurkat cells confirmed the function of FasL on the SW480 cells. The apoptotic rates of Jurkat cells were found to be related with the amount of SW480 cells. CONCLUSION： Colon cancer cells can escape the immune surveillance and killing via decreasing Fas expression, and can counterattack the immune system via increasing FasL expression. Fas/FasL can serve as potential targets for effective antitumor therapy.

关键词： Colon neoplasm Fas system Immune counterattack

Densification of Mo Alloys at 1473K

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Journal of Wuhan University of Technology(Materials Science) 2003年第2期18卷 41-42页

作者：龚道仁 Wuhan University of Technology

By choosing different weight contents of Ni and Cu,Mo alloys have been densified under 1473K-30MPa-1h in a vacuum *** experimental results indicate that,when the contents of Ni and Cu are 3wt% and 2wt% respectively,the relative density of the sample reaches the maximum *** and Cu play different roles in the process of sintering,the powder Ni,dissolved in the liquid Cu,shows more activating sintering feature for Mo than the solid Ni.

关键词： graded flier-plate Mo alloys sintering densification hot-pressing sintering

Pharmacological and toxicological target organelles and safe use of single--walled carbon nanotubes as drug carriers in treating Alzheimer disease

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中国药理通讯 2011年第2期28卷 22-23页

作者： zhong yang Yingge zhang Key Laboratory of Nanopharmacology and Nanotoxicology Beijing Institute of Pharmacology and Toxicology 27 Taiping Road Beijing 100850 China

On Co-precipation Fabrication of Continuously Graded Composites

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Journal of Wuhan University of Technology(Materials Science) 2002年第3期17卷 17-20页

作者：杨中民 StateKeyLab.ofAdvancedTecnologyforMaterialsSynthesisandProcessing WuhanUniversityofTecnologyWuhan430070China.Email：Yangzm@***

The manner by which the particles settle in the laminar flow region is first described and the characteristics of co sedimentation of two species particles are *** subsequent introduction is focused on the fabrication process of continuously graded composites using co sedimentation ***,the authors point out the key problem that should be solved immediately,based on their current work.

关键词： co sedimentation composites fabrication continuously graded composition

Ultralight and superelastic MXene/reduced graphene oxide aerogels for electromagnetic interference shielding

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Nano Research 2025年第1期18卷 1-9页

作者： Xinfeng Zhou yang Dai Guoyao Yue Yiman zhang Lulu Li zhong-Zhen Yu Peng Min Hao-Bin zhang 21 State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Advanced Functional Polymer Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Present address:BOE Technology Innovation Center BOE Technology Group Co.Ltd.Beijing 100176China Xi’an Modern Chemistry Research Institute Xi’an 710065China

Lightweight aerogels feature multifunctionality and a high porosity,yet accompanied with poor structure recovery under large strain *** this work,we develop an air bubble-ice crystal dual template and annealing strategy to integrate low density and high resilience for the conductive transition metal carbides/nitrides(MXene)composite *** air bubbles and ice crystals synergistically exclude the nanosheets to the gas-liquid interfaces,thereby constructing unique Y-shaped junctions and robust *** annealing process greatly enhances the interlayer *** external load,the Yshaped structures prevent the stress concentration at the junctions by transferring the forces to the skeleton for maintaining structural *** addition,the wrinkled and thick cell walls,together with the enhanced interlayer interactions,endow the aerogel with exceptional structural stability and *** a result,the MXene/reduced graphene oxide(RGO)composite aerogels exhibit superelasticity with reversible compressive strains of up to 95%.In addition,the electron bridging effect of the RGO sheets affords the aerogel to deliver excellent electromagnetic interference shielding performance,as high as 46.3 dB at 2.5 ***,the remarkable reshapeability of the aerogels allows for precise regulation of structure and performance(33.5-75.1 dB)by a simple wetting compression *** summary,this work offers helpful inspirations for developing lightweight and superelasticity aerogels for extensive applications.

关键词： lightweight superelasticity MXene aerogel electromagnetic interference shielding reshapeability

Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： Mei zhang Wenhao Li yangfei Chen yang Jiang Xiaofei Guo Han Dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

Ammonia pyrolysis oxidation excited by nanosecond pulsed discharge:Global/fluid models hybrid solution

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Journal of Energy Chemistry 2025年第1期100卷 385-396页

作者： Mingming zhang Hanyu Wu Qi Chen Jiaxin yang Bonan Liu School of Mechanical Electronic and Control Engineering Beijing Jiaotong University China University of Petroleum

The kinetic characteristics of plasma-assisted oxidative pyrolysis of ammonia are studied by using the global/fluid models hybrid solution ***,the stable products of plasma-assisted oxidative pyrolysis of ammonia are *** results show that the consumption of NH3/O2and the production of N2/H2change linearly with the increase of voltage,which indicates the decoupling of nonequilibrium molecular excitation and oxidative pyrolysis of ammonia at low ***,the detailed reaction kinetics mechanism of ammonia oxidative pyrolysis stimulated by a nanosecond pulse voltage at low pressure and room temperature is *** on the reaction path analysis,the simplified mechanism is *** detailed and simplified mechanism simulation results are compared with experimental data to verify the accuracy of the simplified ***,based on the simplified mechanism,the fluid model of ammonia oxidative pyrolysis stimulated by the nanosecond pulse plasma is established to study the pre-sheath/sheath behavior and the resultant consumption and formation of key *** results show that the generation,development,and propagation of the pre-sheath have a great influence on the formation and consumption of *** consumption of NH3by the cathode pre-sheath is greater than that by the anode pre-sheath,but the opposite is true for OH and O（1S）.However,within the sheath,almost all reactions do not ***,by changing the parameters of nanosecond pulse power supply voltage,it is found that the electron number density,electron current density,and applied peak voltages are not the direct reasons for the structural changes of the sheath and ***,the discharge interval has little effect on the sheath structure and gas mixture *** research results of this paper not only help to understand the kinetic promotion of non-equilibrium excitation in the process of oxidative pyrolysis but also help to explore th

关键词： Nanosecond pulsed discharge Ammonia Oxidative pyrolysis Fluid model Global model

Highly conductive and stable iodine doped argyrodite electrolyte for all-solid-state lithium batteries

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Journal of Energy Chemistry 2025年第1期100卷 50-58页

作者： Gaozhan Liu Jing zhang Jing yang Jinghui Chen Xingyue Xiao Xiayin Yao Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences

Lithium argyrodites with high ionic conductivity and low cost are considered as one of the most prospective solid electrolytes for all-solid-state lithium ***,the poor chemical stability and compatibility with lithium metal limit their ***,Li5.4PS4.4Cl1.4I0.2solid electrolyte with high ionic conductivity of 11.49 m S cm-1and improved chemical stability is synthesized by iodine *** ultra-thin Li5.4PS4.4Cl1.4I0.2membrane with thickness of 10μm can be obtained by wet coating process,exhibiting a high ionic conductivity of 2.09 mS cm-1and low areal resistance of 1.17Ω***,iodine doping could in-situ form LiI at the lithium/electrolyte interface and improve the critical current density of Li5.4PS4.4Cl1.6from 0.8 to 1.35 mA *** resultant LiCoO2/Li5.4PS4.4Cl1.4I0.2/Li battery shows excellent cycling stability at 1 C,with a reversible specific capacity of 110.1 mA h g-1and a retention of 80.5% after 1000 *** addition,the assembled LiCoO2/Li5.4PS4.4Cl1.4I0.2membrane/Li pouch cell delivers an initial discharge capacity of 110.4 mA h g-1and 80.5% capacity retention after 100 cycles.

关键词： Argyrodite electrolytes Iodine doping Ionic conductivity Stability All-solid-state lithium battery