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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

Osthole treatment ameliorates Th2-mediated allergic asthma and exerts immunomodulatory effects on dendritic cell maturation and function

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cellular & Molecular Immunology 2017年第11期14卷 935-947页

作者： chen-Yuan chiang chen-chen Lee chia-Kwung Fan Huei-mei Huang Bor-Luen chiang Yueh-Lun Lee Division of Pulmonary Medicine Department of Internal MedicineWan Fang HospitalTaipei Medical UniversityTaipei 11031TaiwanChina Department of Internal Medicine School of MedicineCollege of MedicineTaipei Medical UniversityTaipei 11031TaiwanChina Department of Microbiology and Immunology School of MedicineCollege of MedicineChina Medical UniversityTaichung 40402TaiwanChina Department of Parasitology School of MedicineCollege of MedicineTaipei Medical UniversityTaipei 11031TaiwanChina Graduate Institute of Medical Sciences College of MedicineTaipei Medical UniversityTaipei 11031TaiwanChina Graduate Institute of clinical Medicine College of MedicineNational Taiwan UniversityTaipei 10048TaiwanChina Department of Microbiology and Immunology School of MedicineCollege of MedicineTaipei Medical UniversityTaipei 11031TaiwanChina

Osthole,an active component of chinese herbal medicines,reportedly possesses various pharmacological properties and has potential therapeutic *** study explored the anti-allergic effects of osthole in asthmatic mice and investigated the immunomodulatory actions of osthole on dendritic cells(Dcs)and T ***,we show that oral administration of osthole to BALB/c mice after ovalbumin(OVA)sensitization ameliorated all of the cardinal features of T helper 2(Th2)-mediated allergic asthma;namely,the production of OVA-specific immunoglobulin E,airway hyperresponsiveness,airway inflammation and the production of Th2-type cytokines including interleukin(IL)-4,IL-5 and ***,IL-10 production was not inhibited and was even enhanced by osthole *** observed a significant increase in the percentages of IL-10-producing Dcs and forkhead box P3-positive regulatory T(Treg)cells in osthole-treated asthmatic ***,in vitro analyses revealed that osthole-treated bone-marrow-derived Dcs had a partial maturation phenotype,secreting large amounts of IL-10 and low levels of proinflammatory cytokines,such as IL-12,IL-6 and tumor necrosis factor-α,and displaying reduced levels of MHc class II surface *** Dcs displayed immunosuppressive capacity by directly inhibiting effector T-cell responses or inducing Treg *** addition,osthole directly inhibited the activated cD4+T-cell proliferation and Th1/Th2-type cytokine production in this ***,these results suggest that Dcs and T cells are potential target cells responsible for the action of osthole against allergic asthma.

关键词： asthma dendritic cell osthole T cell

TWO MODELS FOR ROLL WAVES IN A MUD LAYER

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Journal of Hydrodynamics 1995年第2期7卷 1-16页

作者： chiang c. mei Ko-fei Liu chiu-on Ng(Department of civil and Environmental Engineering Massachusetts Institute of Technology,cambridge,MA USA) Massachusetts Inst of Technology Cambridge United States

As has been extensively reported by hydraulic engineers in china, the flow of hyperconcentrated fluid mud in rivers is often pulsating and appears as roll waves. We report here two theories for such pulsating flows besed on two constitutive laws: the power law and Bingham plastic law. In order to account for the nonlinear bores convective inertia is kept in the approximate long wave equations. Kar man's momentum integral method with an assumed velocity profile is then employed. Results of the linearized instability analyses are *** bores are obtained either as stationary wave solutions or as the long- time limit of unstable disturbances which are initially infinitesimal. Implications on ho scour is examined.

关键词： hyperconcentrated fluid mud pulsating flow power law Bingham plastic Law

Equivalent series system to model a multiple friction pendulum system with numerous sliding interfaces for seismic analyses

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Earthquake Engineering and Engineering Vibration 2014年第1期13卷 85-99页

作者： c.S.Tsai H.c.Su T.c.chiang Department of civil Engineering Feng Chia University Department of Water Resources Engineering and conservation Feng Chia University Earthquake Proof Systems Inc.

current structural analysis software programs offer few if any applicable device-specifi c hysteresis rules or nonlinear elements to simulate the precise mechanical behavior of a multiple friction pendulum system(MFPS) with numerous sliding *** on the concept of subsystems,an equivalent series system that adopts existing nonlinear elements with parameters systematically calculated and mathematically proven through rigorous derivations is *** aim is to simulate the characteristics of sliding motions for an MFPS isolation system with numerous concave sliding interfaces without prior knowledge of detailed information on the mobilized forces at various sliding *** MFPS with numerous concave sliding interfaces and one articulated or rigid slider located between these interfaces is divided into two subsystems: the fi rst represents the concave sliding interfaces above the slider,and the second represents those below the *** equivalent series system for the entire system is then obtained by connecting those for each subsystem in *** equivalent series system is validated by comparing numerical results for an MFPS with four sliding interfaces obtained from the proposed method with those from a previous study by Fenz and ***,these numerical results demonstrate that an MFPS isolator with numerous concave sliding interfaces,which may have any number of sliding interfaces,is a good isolation device to protect structures from earthquake damage through appropriate designs with controllable mechanisms.

关键词： seismic isolation base isolation earthquake engineering multiple friction pendulum system structural control mathematical modeling equivalent series system

Some multi-scale problems in wave hydrodynamics

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Some multi-scale problems in wave hydrodynamics

Pair production in Reissner-Nordstrom-Anti de Sitter black holes

中国力学大会-2015

作者： mei chiang c. Engineering Emeritus Mass.Inst.Tech. Shanghai Jiao Tong University

We shall first discuss the principles of ANAcONDA which is a novel design of wave power *** the second example,the propagation of internal tides and surface waves over randomly irregular seabed is *** the last example we describe the dissipation of wave energy by a shallow canopy consisting of an array of vertical cylinders.

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chinese Physics c 2021年第6期45卷 220-232页

作者： Jun Zhang Yi-Yu Lin Hao-chun Liang Ke-Jia chi chiang-mei chen Sang Pyo Kim Jia-Rui Sun School of Physics and Astronomy Sun Yat-Sen UniversityGuangzhou 510275 Department of Physics and Center for High Energy and High Field Physics(CHiP)National Central UniversityChungli 32001 Department of Physics Kunsan National UniversityKunsan 54150

We studied the pair production of charged scalar particles of a five-dimensional near extremal Reissner-Nordström-Anti de Sitter(RN-AdS_(5))black *** pair production rate and the absorption cross section ratio in full spacetime are obtained and are shown to have a concise relation with their counterparts in the near horizon *** addition,the holographic descriptions of the pair production,both in the IR cFT in the near horizon region and the UV cFT at the asymptotic spatial boundary of the RN-AdS_(5) black hole,are analyzed in the AdS_(2)/cFT_(1) and AdS_(5)/cFT_(4) correspondences,*** work gives a complete description of scalar pair production in a near extremal RN-AdS_(5) black hole.

关键词： black holes pair production AdS/cFT correspondence

computational Study on Furnace Process in a Multi-burner Boiler of Pulverized coal Fired Tangentially at Four corners

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Journal of central South University 2000年第3期12卷 152-155页

作者： Zhou, P mei, c cong, Gc cent S Univ Technol Dept Appl Phys & Heat Engn Changsha 410083 Peoples R China

Aiming at the optimization of the operation condition, a general numerical method for calculating pulverized coal combustion in a full scale furnace fired tangentially at four corners is adopted. “ k ε ” turbulence model is used for the gas phases and a stochastic approach based on the Lagrangian technique is used for particle phases. Two competing reactions model for the coal devolatilization and PDF (the probability density function) method for the combustion of the gas phases are employed. In the numerical simulations, assuming the air distribution of second port level is of pagoda, waist drum and uniform type. The results show that pagoda type air distribution is advantageous to ignition and smooth combustion of pulverized coal, and suitable to inferior coal combustion in practice. In the present furnace, the igniting distance at 1st and 3rd corner is longer than that at 2nd and 4th corner. The results from numerical calculations are in good agreement with those of observed in practice.

关键词： power station boiler combustion of pulverized coal numerical simulation

费城·易爱难收美国历史的开启者自由精神的象征地

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旅游世界 2015年第11期 130-137页

作者： Emily Wang Elliott c.mei

＂人人因被造而平等,造物者赋予他们若干不可剥夺的权利,其中包括生命权、自由权和追求幸福的权利。＂自1776年以来,《独立宣言》中所体现的原则就一直在全世界为人传颂。美国的改革家们,不论是出于什么动机,不论是为了废除奴隶制,禁止... 详细信息

＂人人因被造而平等,造物者赋予他们若干不可剥夺的权利,其中包括生命权、自由权和追求幸福的权利。＂自1776年以来,《独立宣言》中所体现的原则就一直在全世界为人传颂。美国的改革家们,不论是出于什么动机,不论是为了废除奴隶制,禁止种族隔离或是要提高妇女的权利,都要向公众提到＂人人生而平等＂。费城,是《独立宣言》的诞生地,而其中的这句引言几百年来激励着美国人民追求自由与幸福。这座城市,就是如此厚重,更是如此自由而开放。如果你想了解美国,那么请先从费城开始。

关键词：开启者《独立宣言》种族隔离言几城市公园艺术博物馆罗丹博物馆法国印象派兰克后印象派

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雾里看花的地产风云

旅游世界 2015年第9期 40-49页

作者： Lei Lei Elliott c.mei

近几年,随着中国经济的高速发展,中国入均储蓄的大幅度增加,加之,＂房子＂一直是中国人作为投资的首要选择,中国赴海外购房几乎变成了一种热潮。一方面,自去年11月,美国总统奥巴马在亚太经合组织领导入峰会发表演讲,并宣布美国对中国延... 详细信息

近几年,随着中国经济的高速发展,中国入均储蓄的大幅度增加,加之,＂房子＂一直是中国人作为投资的首要选择,中国赴海外购房几乎变成了一种热潮。一方面,自去年11月,美国总统奥巴马在亚太经合组织领导入峰会发表演讲,并宣布美国对中国延长签证时间,

关键词：旅游签证物业管理费旧金山湾区现金支付租金收入银行本票交易记录大宅个人支票富人区