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MICROStRUCtURE AND INCLUSION CHARACtERIZAtION IN tHE SIMULAtED COARSE-GRAIN HEAt AFFECtED ZONE WItH LARGE HEAt INPUt OF A ti-Zr-MICROALLOYED HSLA StEEL

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Acta Metallurgica Sinica(English Letters) 2005年第2期18卷 96-106页

作者： Y.t.chen X.chen Q.F.Ding J.Zeng technologyCenter WuhanIronandSteel（group）CooperationWuhan430080China

the microstructure and the characteristics of the inclusions embedded in ferrite matrix in simulated coarse-grain heat affected zone (CGHAZ) of a ti-Zr-treated high strength low alloy (HSLA) steel have been investigated. the microstructure of the simulated CGHAZ dominantly consisted of intragranular acicular ferrite (IAF) combining with a small amount of polygonal ferrite (PF), widmanst tten ferrite (WF), bainite ferrite (BF), pearlite and martensite-austenite (M-A) islands. the PF, WF and BF were generally observed at the prior austenite grain boundaries and the interlocking acicular ferrite was usually found intragranularly. It was found that the inclusions were composed of ti2O3, ZrO2, Al2O3 locating at the center of the particles and MnS lying on the surface layer of the inclusions. the intragranular complex inclusions promoted the acicular ferrite formation and the refinement of microstructure whilst those at prior austenite grain boundaries caused PF formation on the inclusions. the simulated CGHAZ consisting of such complicated microstructure exhibited desired mechanical properties.

关键词： microalloyed HSLA steel heat affected zone microstructure mechanical property inclusion acicular ferrite titanium zirconium

two Processes Comparison by Using Capability Indices Cpm

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厦门大学学报(自然科学版) 2002年第S1期 188-189页

作者： K S chen,Jann-Pygn chen,t W chen Department of Industrial Engineering & Management National Chin -Yi Institute of technology Department of Industrial Engineering & Management National Chin -Yi Institute of technology Department of Mechanical Engineering National Chin-Yi Institute of technology taiwan China

In recent years, there has been mounting interest i n measuring process performance in manufacturing industry. Based on analyzing the process capability indices, a production department can trace and improve a poor process to enhance quality levels and satisfy customers. the process capabilit y analysis can also serve as an important reference for making decisions for imp roving the global quality of all products. Since C p and C pk are failed to account for process centering, the index C pm is developed. the index C pm takes the process centering into consideration and is su itable for the processes with nominal-the-best type. there are other indices l ike C pu and C pl, and those indices are used for unilateral s pecification processes. Chou (1994) developed a procedure using estimators of C p, C pu and C pl for practitioners to determine whether two p rocesses are equal capability or not. For bilateral specifications processes, i ndex C p is failed to measure process yield and process centering. thus, th e index C pm is used to develop a similar procedure for practitioners t o determine whether two processes are equal capability or not. the decisions mad e using the procedure to select the better supplier are, of course, more reliabl e.

关键词： process capability indices test statistic proce ss yield process centering

Effects of layer interactions on instantaneous stability of finite Stokes flows

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Applied Mathematics and Mechanics(English Edition) 2024年第1期45卷 69-84页

作者： chen ZHAO Zhenli chen C.t.MUtASA Dong LI School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China

the stability analysis of a finite Stokes layer is of practical importance in flow control. In the present work, the instantaneous stability of a finite Stokes layer with layer interactions is studied via a linear stability analysis of the frozen phases of the base flow. the oscillations of two plates can have different velocity amplitudes, initial phases, and frequencies. the effects of the Stokes-layer interactions on the stability when two plates oscillate synchronously are analyzed. the growth rates of two most unstable modes when δ t equal, and δ = δ*/h*, where δ*and h*are the Stokes-layer thickness and the half height of the channel, respectively. However, their vorticities are different. the vorticity of the most unstable mode is symmetric, while the other is asymmetric. the Stokes-layer interactions have a destabilizing effect on the most unstable mode when δ tabilizing effect when δ > 0.68. However, the interactions always have a stabilizing effect on the other unstable mode. It is explained that one of the two unstable modes has much higher dissipation than the other one when the Stokes-layer interactions are strong. We also find that the stability of the Stokes layer is closely related to the inflectional points of the base-flow velocity profile. the effects of inconsistent velocity-amplitude, initial phase, and frequency of the oscillations on the stability are analyzed. the energy of the most unstable eigenvector is mainly distributed near the plate of higher velocity amplitude or higher oscillation frequency. the effects of the initial phase difference are complicated because the base-flow velocity is extremely sensitive to the initial phase.

关键词： finite Stokes layer instantaneous stability Stokes-layer interaction asynchronous oscillation

FAB MS of Permethylated L-β-Aspartamido-Carbohydrates

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Chemical Research in Chinese Universities 1998年第2期14卷 52-54,56-58页

作者： WANG tsong-hui chen t.F. Barofsky D.F. Department of Instrumental Analysis Institute of Forensic ScienceBeijing100038 Department of Agricultural Chemistry Oregon State UniversityCorvallisOregon 97331USA

Native glycopeptides are suitable to FAB mass spectrometric analysis due to their high polarity, low volatility and large molecular size. the deficiency in the FAB spectra of glycopeptides is the limited number of peaks and the low abundances of fragments. In order to obtain the information of carbohydrate sequence the permethylation of carbohydrate, a well known method, is recommended here. the L β aspartamido carbohydrate from chicken egg albumin was chosen as the model compound of glycopeptides. Our experiments showed obvious carbohydrate sequence in the spectra of permethylated aspartamido carbohydrates. the key conditions to perform the method are the methylation reagent and purification process for the permethylated derivatives.

关键词： Glycopeptide Ovalbumin Permethylation FABMS

First-Principle Calculations of Hardness and Melting Point of Mo_2C

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Journal of Materials Science & technology 2009年第3期25卷 419-422页

作者： X.R. Wang M.F. Yan H.t. chen School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

this paper has constructed two kinds of atomic and electronic models for hexagonal β-Mo2C and orthorhombic α-Mo2C. the optimized lattice parameters, elastic constant matrixes and overlap population for Mo2C crystal cells have been obtained to realize the characterization of the hardness and melting point of the two structures by the first-principles plane wave pseudo potential method based on the density functional theory. the results reveal that the calculated lattice parameters of the Mo2C crystal cells agree with the experimental and other calculated data. the calculated melting point/hardness are 2715 K/11.38 GPa for β-Mo2C and 2699 K/10.57-12.67 GPa for α-Mo2C, respectively. the calculated results from the density of states （DOS） demonstrate that the hybridization effect between Mo-3d and C-2p states in α-Mo2C crystal cell is much stronger than that in β-Mo2C one.

关键词： First-principle Mo2C Hardness Melting point Density of states

Resistance switching for RRAM applications

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Science China(Information Sciences) 2011年第5期54卷 1073-1086页

作者： chen Frederick t. LEE HengYuan HSU YenYa chen PangShiu LIU WenHsing tSAI chenHan SHEU ShyhShyuan tSAI MingJinn Nanoelectronic technology Division Electronics and Optoelectronics Research Laboratories Industrial Technology Research Institute (ITRI) Department of Chemical and Materials Engineering Ming Shin University of Science and Technology

Resistive random access memory (RRAM or ReRAM) is a non-volatile memory (NVM) technology that consumes minimal energy while offering sub-nanosecond switching. In addition, the data stability against high temperature and cycling wear is very robust, allowing new NVM applications in a variety of markets (au- tomotive, embedded, storage, RAM). Based on sudden conduction through oxide insulators, the characteristics of RRAM technology have still yet to be fully described. In this paper, we present our current understanding of this very promising technology.

关键词： random access memory storage oxide breakdown oxygen vacancies

深度学习系统帮助精准预测糖尿病视网膜病变进展

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张江科技评论 2024年第1期 127-127页

作者： DAI L SHENG B chen t L 戴川

创新点,糖尿病视网膜病变(DR)是糖尿病最常见的微血管并发症,也是可预防失明的主要原因。这种疾病在早期阶段症状不明显,但在发展到严重程度时可能导致永久的视力损害甚至失明。由于病情进展在不同患者间存在较大差异,很难准确预测每位... 详细信息

创新点,糖尿病视网膜病变(DR)是糖尿病最常见的微血管并发症,也是可预防失明的主要原因。这种疾病在早期阶段症状不明显,但在发展到严重程度时可能导致永久的视力损害甚至失明。由于病情进展在不同患者间存在较大差异,很难准确预测每位糖尿病患者患DR的风险和时间。

关键词：视力损害微血管并发症深度学习病情进展早期阶段症状不明显失明

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益智

分子植物育种 2024年第2期22卷 701-701页

作者：张洁刘楚楚

益智(Alpinia oxyphylla)是姜科(Zingiberaceae)山姜属(Alpinia)多年生草本植物,主要分布在海南、广东,近年来也在云南和福建等地开始种植,多生长或栽培在林下阴湿的环境中。益智始载于《本草拾遗》中,其果实名唤益智仁,采摘晒干后可入...

益智(Alpinia oxyphylla)是姜科(Zingiberaceae)山姜属(Alpinia)多年生草本植物,主要分布在海南、广东,近年来也在云南和福建等地开始种植,多生长或栽培在林下阴湿的环境中。益智始载于《本草拾遗》中,其果实名唤益智仁,采摘晒干后可入药,根据《本草拾遗》记载,益智仁有“止呕哕……治遗精虚漏,小便余沥,益气安神,补不足,利三焦,调诸气”的功效。根据国家卫生健康委、国家市场监督管理总局发布的文件《按照传统既是食品又是中药材物质目录》,益智仁在限定使用范围和剂量内可作为药食两用。

关键词：

Amplitude analysis of the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)

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Chinese Physics C 2024年第8期48卷 6-33页

作者： M.Ablikim M.N.Achasov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso Q.An Y.Bai O.Bakina I.Balossino Y.Ban H.-R.Bao V.Batozskaya K.Begzsuren N.Berger M.Berlowski M.Bertani D.Bettoni F.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin J.F.Chang W.L.Chang G.R.Che G.Chelkov C.chen C.H.chen Chao chen G.chen H.S.chen M.L.chen S.J.chen S.L.chen S.M.chen t.chen X.R.chen X.t.chen Y.B.chen Y.Q.chen Z.J.chen Z.Y.chen S.K.Choi X.Chu G.Cibinetto F.Cossio J.J.Cui H.L.Dai J.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich C.Q.Deng Z.Y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori B.Fang S.S.Fang W.X.Fang Y.Fang Y.Q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng J.H.Feng Y.t.Feng K.Fischer M.Fritsch C.D.Fu J.L.Fu Y.W.Fu H.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia P.t.Ge Z.W.Ge C.Geng E.M.Gersabeck B.Ding X.X.Ding Y.Ding Y.Ding J.Dong L.Y.Dong M.Y.Dong X.Dong M.C.Du S.X.Du Z.H.Duan P.Egorov Y.H.Fan J.Fang JA.Gilman K.Goetzen L.Gong W.X.Gong W.Gradl S.Gramigna M.Greco M.H.Gu Y.t.Gu C.Y.Guan Z.L.Guan A.Q.Guo L.B.Guo M.J.Guo R.P.Guo Y.P.Guo A.Guskov J.Gutierrez K.L.Han t.t.Han X.Q.Hao F.A.Harris K.K.He K.L.He F.H.Heinsius C.H.Heinz Y.K.Heng C.Herold t.Holtmann P.C.Hong G.Y.Hou X.t.Hou Y.R.Hou Z.L.Hou B.Y.Hu H.M.Hu J.F.Hu t.Hu Y.Hu G.S.Huang K.X.Huang L.Q.Huang X.t.Huang Y.P.Huang t.Hussain F.H\"olzken N.H\"usken N.in der Wiesche M.Irshad J.Jackson S.Janchiv J.H.Jeong Q.Ji Q.P.Ji W.Ji X.B.Ji X.L.Ji Y.Y.Ji X.Q.Jia Z.K.Jia D.Jiang H.B.Jiang P.C.Jiang S.S.Jiang t.J.Jiang X.S.Jiang Y.Jiang J.B.Jiao J.K.Jiao Z.Jiao S.Jin Y.Jin M.Q.Jing X.M.Jing t.Johansson S.Kabana N.Kalantar-Nayestanaki X.L.Kang X.S.Kang M.Kavatsyuk B.C.Ke V.Khachatryan A.Khoukaz R.Kiuchi O.B.Kolcu B.Kopf M.Kuessner X.Kui A.Kupsc W.K\"uhn J.J.Lane P.Larin L.Lavezzi t.t.Lei Z.H.Lei H.Leithoff M.Lellmann t.Lenz C.Li C.Li C.H.Li cheng Li D.M.Li F.Li G.Li H.Li H.B.Li H.J.Li H.N.Li Hui Li J.R.Li J.S.Li K.Li L.J.Li L.K.Li Lei Li M.H.Li P.R.Li Q.M.Li Q.X.Li R.Li S.X.Li t.Li W.D.Li W.G.Li X.Li X.H.Li X.L.Li X.Y.Li Y Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780 BochumGermany Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central South University Changsha 410083China China Center of Advanced Science and technology Beijing 100190China China University of Geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COMSAtS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China Henan University of Science and technology Luoyang 471003China Henan University of technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN Laboratori Nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN Laboratori Nazionali di Frascati University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN Sezione di Ferrara University of FerraraI-44122FerraraItaly Inner Mongolia University Hohhot 010021China Institute of Modern Physics Lanzhou 730000China Institute of Physics and technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de A

Using e^(+)e^(−)annihilation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at the center-of-mass energy√s=3.773 GeV with the BESIII detector,a joint amplitude analysis is performed on the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).the fit fractions of individual components are obtained,and large interferences among the dominant components of the decays D^(0)→a_(1)(1260)π,D^(0)→π(1300)π,D^(0)→ρ(770)ρ(770),and D^(0)→2(ππ)_(S)are observed in both *** the obtained amplitude model,the CP-even fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determined to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,*** branching fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are measured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,*** amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of D^(0)→4πwhen used to determine the CKM angleγ(ϕ_(3))via the B^(−)→DK^(−)decay.

关键词： BESIII D^(0)meson decays amplitude analysis CP-even fraction