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| 1 | NUMERICAL SIMULATION OF ROUND TO OVAL ROLLING PROCESS显示文摘Three dimensional thermal-mechanical coupled elasto-plastic FEM has been used for simulation of round to oval single pass rolling. The analysis was conducted using MARC/AUTOFORCE1. 2 code. The material is assumed to be elasto-plastic and it obey the Von Mises yield criterion and Prandtl- Reuss rule. Deformation of the workpiece is simulated in a step-by-step manner,updating the coordinates of material points and the property after each step, so that both nonsteady-state and stendy-state deformation can be simulated. The heat transfter between the workpiece, the rolls, and enviroment and the heat generation due to plastic work and friction force, are considered in the analys- is.Predicted the deformation shape of the workpiece, distributions of strains, stresses, strain rates and temperatures, roll-separating force and roll torque are presented. | Y. W. Wang, Y. L. King, D. H. Yuan, S. G. Liu and Z. Y. Yu 1 ) University of Science and Technology Beijing, Beijing 100083, China 2) Daye Special Steel Co., Huangshi 435001, China | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，2： | 27 |
| 2 | EFFECT OF CHEMICAL COMPOSITION ON RETAINED AUSTENITE IN TRIP STEEL显示文摘The systematic chemical compositions including common C, Si, Mn, Al, and micro- alloying elements of Ti and Nb were designed for high volume fraction of retained austenite as much as possible. The thermo-cycle experiments were conducted by using Gleeble 2000 thermo-dynamic test machine for finding the appropriate composition. The experimental results showed that chemical composition had a significant effect on retained austenite, and the appropriate compositions were determined for commercial production of TRIP steels. | Y. Chen and X. ChenWuhan University of Science and Technology, Wuhan 430081, ChinaQ.F. Wang, G.L. Yuan and. C. Y. LiTechnical Center of Wuhan Iron and Steel Co., Wuhan 430080, ChinaX. Y. Li and Y.X. WangCentral Iron and Steel Research Institute, Beijing 1 | 2002 | Acta Metallurgica Sinica(English Letters)2002，15，4： | 19 |
| 3 | Vagal Nerve Stimulation May Be a Potentially Beneficial Treatment for Acute Myocardial Ischemia显示文摘 | J. Xiong F. S. Xue Y. J. Yuan Q. Wang S. Li J. H. Liu X. Liao Y. M. Zhang | 2010 | 麻醉与监护论坛2010，17，5： | 10 |
| 4 | Automated lfare forecasting using a statistical learning technique显示文摘We present a new method for automatically forecasting the occurrence of solar lfares based on photospheric magnetic measurements.The method is a cascading combination of an ordinal logistic regression model and a support vector machine classifier.The predictive variables are three photospheric magnetic parameters,i.e., the total unsigned magnetic lfux,length of the strong-gradient magnetic polarity inversion line,and total magnetic energy dissipation.The output is true or false for the occurrence of a certain level of lfares within 24 hours.Experimental results,from a sample of 230 active regions between 1 996 and 2005,show the accuracies of a 24-hour flare forecast to be 0.8 6,0.72,0.65 and 0.8 4 respectively for the four different levels.Comparison shows an improvement in the accuracy ofX-class lfare forecasting. | Yuan Yuan Frank Y. Shih Ju Jing Hai-Min Wang | 2010 | Research in Astronomy and Astrophysics2010，10，8： | 8 |
| 5 | GROWTH MECHANISM OF TiC WHISKERS PREMRED BY A MODIFIED CHEMICAL VAPOR DEPOSITION METHOD显示文摘High quality TiC whiskers have been prepared by a modified chemical vapor deposition (CVD) method using TiCl4 and CH4 as reactant gases and Ni as substrate. The deposition temperature and gas flow mies have ampreciable effect on the whisker growth.The whisker orientations and morphology are determined by X-my diffraction (XRD),scanning electron micmpmph (SEM) and transmission electron microgmph (TEM).In addition to the spherical tips, spiral growth microsteps and obvious terraces are observed at the tips and side faces of whiskers in the present eoperiment. The whiskers grow mostly along (100) direction. The whisker growth mechanism is discussed in detail. | J.S. Pan and Y. W. Yuan (Department of Materials Science and Engineering, Tsinghua Universityt Beijing 100084, China)(Department of Materials Science and Engineering, Tsinghua Universityt Beijing 100084, China) | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，3： | 7 |
| 6 | Crystal Structure of Arabidopsis thaliana Dawdle Forkhead-Associated Domain Reveals a Conserved Phospho-Threonine Recognition Cleft for Dicer-Like 1 Binding显示文摘游荡(DDL ) 是为 Arabidopsis 的发展处理蛋白质必需品的 microRNA。DDL 包含一个通常认为的原子本地化信号在它的氨基终点、联系 forkhead (联邦住房管理局) 在 carboxyl-terminus.Here 的领域,我们报导 Arabidopsis 的 FHA 领域的水晶结构游荡,在 1.7- 由多重波长的异常分散方法决定了吗?分辨率。DDL 联邦住房管理局结构显示包含包括二长反平行的海滨的一个唯一的结构的主题的 seven-stranded-sandwich 体系结构。惊人地, DDL 联邦住房管理局领域的 crystalpacking 揭示那从对称相关的 DDL 联邦住房管理局领域的 glutamate 残余,结构的 mimicof phospho-threonine,被保存 phospho-threonine 绑定劈开的在结构上明确地认出。Consistentlywith 结构的观察,在 Nicotiana benthamiana 执行的 co-immuno-precipitation 实验证明有 DCL1 的 DDL 联邦住房管理局领域 co-immuno-precipitates 碎裂包含预言的 pThr+3 (Ile/Val/Leu/Asp ) 主题。一起拿,我们数由正规绑定的残余 DDL 联邦住房管理局 domainas 劈开的目标的识别安置联邦住房管理局的关键分子的事件在植物 miRNA processing.Key 词的调停域的 proteinprotein 相互作用: | Satoru Machida | 2013 | Molecular Plant2013，6，4： | 6 |
| 7 | EFFECTS OF CARBON CONTENT AND ROLLING PROCESSING ON RETAINED AUSTENITE FOR HOT-ROLLED TRIP STEELS显示文摘The effects of finishing rolling temperature and coiling temperature on retained austen-ire were studied for hot-rolled transformation induced plasticity (TRIP) steels withdifferent carbon content. The experimental results showed that an appropriate volumefraction of retained austenite from 6% to 11% could be obtained according to the dif-ferent carbon content less than 0.20% by controlled finishing rolling and coiling forthe hot-rolled TRIP steels. It can be concluded that carbon content has a significanteffect on the fraction of retained austenite and coiling processing plays stronger roleon retaining austenite than fishing rolling processing. | Y. Chen, X. Chen, Z.X. Yuan, B.F. Xu, A.M. Guo, P.H. Li and S.K. PuWuhan University of Science and Technology, Wuhan 430081, ChinaTechnical Center of Wuhan Iron and Steel Co., Wuhan 430080, China | 2002 | Acta Metallurgica Sinica(English Letters)2002，15，5： | 5 |
| 8 | LINEAR SYSTEMS ASSOCIATED WITH NUMERICAL METHODS FOR CONSTRAINED OPITMIZATION显示文摘Linear systems associated with numerical methods for constrained optimization are discussed in thia paper ,It is shown that the corresponding subproblems arise in most well-known methods,no matter line search methods or trust region methods for constrained optimization can be expressed as similar systems of linear equations.All these linear systems can be viewed as some kinds of approximation to the linear system derived by the Lagrange-Newton method .Some properties of these linear systems are analyzed. | Y. Yuan(State Key Laboratory of Scientific and Engineering Computing, Institute of Computational Mathematics and Scientific/Engineering Computing, Chinese Academy of Sciences, P. O. Box 2719,Beijing 100080, China.) | 2003 | Journal of Computational Mathematics2003，21，1： | 3 |
| 9 | Census of Kuiper Comets-the TAOS Project显示文摘Cometary nuclei, the remnant icy bodies of planet formation, located at the outer edge of the solar system, are relatively poorly studied because of their small sizes and thus faintness. Thus far more than a hundred large members (size about 100 km) of this cometary population in the Kuiper belt have been identified. Smaller bodies (10 km) are much too faint to image directly and their number so far can only be extrapolated on theoretical grounds. The Taiwan-America Occultation Survey (TAOS) will conduct a census of the number of Kuiper belt objects down to a few km size by monitoring chance stellar occultations by these cometary nuclei. We will set up an array of small (50cm), wide-field (f/1 9) telescopes, each equipped with a 2K squared CCD camera, along a 7 km baseline in central Taiwan at an elevation above ~ 3000 m. The robot telescopes will operate in a coincidence mode, so the sequence and timing of any candidate occultation event can be recorded and distinguished against a false detection. The Lawrence Livermore National Laboratory, the National Central University, and the Academia Sinica, will each contribute one telescope system. Researchers from an international variety of institutes are also participating in the project. Our experiment provides the only means to study the cometary population in the small-sized end of the distrbution. A great number of scientific byproducts, notably variable stars, will also derive from the huge TAOS database, some 10, 000 giga-bytes worth of photometrical measuremements per year. | Wen Ping ChenOther TAOS team members: C. Alcock, K. Cook, S. Marshall, M. Hammergren(LLNL) T. Lee, C. Yuan, C. Y. Wen, S. K. King(ASIAA) W. S. Tsay, W. Ip, C. Lemme, J. H. Wang(NCU) T. Axelrod(ANU) I. de Pater(UCB) J.Lissauer(Ames) Y. I. Byun(Yonsei | 1999 | 天文研究与技术1999，，S1： | 3 |
| 10 | A Method of Inversing the Peak Density of Atomic Oxygen Vertical Distribution in the MLT Region From the OI (557.7 nm)Night Airglow Intensity显示文摘In this paper, using the MSISE-90 model as the reference atmosphere, we discuss the feasibility and method of deducing the peak densities of the undisturbed atomic oxygen profiles in the MLT region (the mesosphere and lower thermosphere region) from OI (557.7 nm) night airglow intersities. The peak densities for different seasons, latitudes and longitudes are deduced from OI (557.7nm) airglow intensities through this expression. We analyze the features of inversion relative errors and discuss the influence of the variations in temperature on inversion errors. The results indicate that all inversion errors are less than 5% except for those at high altitudes in the summer hemisphere. And the impact of the variations in temperature on errors is not significant. | H. Gao J. Y. Xu W. Yuan | 2005 | 空间科学学报2005，25，5： | 3 |
| 11 | PREPARATION OF Fe/Ni MULTILAYER FILMS AND THEIR MAGNETIC PROPERTIES显示文摘FeNi multilayer films were prepared by EB-PVD technique. A modified TG-DSC apparatus was used to measure their Curie temperatures, which were around 7600C, lower than that of pure Fe thin films. The easy magnetization axis was in-plane. High temperature annealing in vacuum decreased the coercivity sharply. The saturation magnetization also changed with heat treatment. After annealing at the temperature equal to the substrate temperature during deposition, the saturation magnetization decreased. | L.L. Liu, X.F. Bi, S.K. Gong, H.B. Xu and X. Y. Yuan Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China | 2002 | Acta Metallurgica Sinica(English Letters)2002，15，2： | 2 |
| 12 | APOPTOSIS AND TAXOL PRODUCTION IN SUSPENSION CULTURES OF Taxus spp.CELLS显示文摘The hallmark of apoptosis, in suspension cultures of Taxus spp. cells induced by fungal extractive or by abiotic means, was studied by total DNA agarose gel electrophoresis and in situ end-labeling. The cleavage of nuclear DNA (nDNA) into oligonucleosomal fragments(DNA laddering) was a characteristic of apoptosis, which involved cell shrinkage, condensation of cytoplasm and tracheary elements differentiation. Terminal deoxynucleotidy transferase-mediated dUTP nick end in situ labeling (TUNEL) assay of Taxus spp. cells showed that fungal extractive or abiotic elicltors (Ce4+, Taxol, H2O2) induced TUNEL positive. Also, the increase of the apoptotic cell ratio was accompanied by the increase of secondary metabolites (especially Taxol). These results suggest that apoptosis may have some coincidence with biosynthesis of Taxol. The implication of apoptosis for the production of secondary metabolites in plant cell cultures is discussed. | Yuan Y. J., Ma L Y., Ge Z. Q.,and Miao Z. Q. Zeng A.P. (Department of biochemical engineering, Tianjin University, Tianjin 300072, China) (Biochemical Engineering Division, GBF,D-38124 Breunschweig, Germany) | 2000 | 化工学报2000，51，S1： | 2 |
| 13 | Trefoil factor 1 suppression of E-CADHERIN enhances prostate carcinoma cell invasiveness and metastasis显示文摘 | N.M. Bougen N. Amiry Y. Yuan X.J. Kong V. Pandey L.J.P. Vidal J.K. Perry T. Zhu P.E. Lobie | 2012 | Cancer Letters2012，，： | 2 |
| 14 | Prucalopride in the treatment of chronic constipation in patients from the Asia‐Pacific region: a randomized, double‐blind, placebo‐controlled study显示文摘 | M. Ke D. Zou Y. Yuan Y. Li L. Lin J. Hao X. Hou H. J. Kim | 2012 | Neurogastroenterology & Motility2012，，11： | 2 |
| 15 | Multimolecular complex of Par-4 and E2F1 binding to Smac promoter contributes to glutamate-induced apoptosis in human-bone mesenchymal stem cells显示文摘Neural cells undergo glutamate-induced apoptosis in ischaemic brain tissue,in which prostate apoptosis response-4 gene (Par-4)is involved.Human-bone mesenehymal stem cells can be utilized as an effective therapy for ischemic brain injury.In this study,we found that glutamate could induce apoptosis in human-bone mesenehymal stem cells,accompanied by increased expression of Par-4 gene and Smac release from mitochondria.Repressing Par-4 expression attenuated the glutamate-induced apoptosis.Both Par-4 protein and E2F1 protein could bind to E2F1-binding BS3 site on Smac promoter and participated in the formation of a pro- teins-DNA complex.Moreover,in the eomplex,E2F1,not Par-4,was found to be directly bound to the Smac promoter,suggesting that Par-4 exerted indireetly its transcriptional control on the Smac gene though interacting with E2F1.Expression of full-length Par-4 in human-bone mesenchymal cells resulted in increased activity of the Smac promoter.In addition,the indirect transcripional regula- tion of Par-4 on Smac depended on its COOH terminus-mediated interaction between Par-4 and E2F1.We conclude that the forma- tion of proteins-DNA complex,containing Par-4 protein,E2F1 protein and the Smac promoter,contributes to the pro-apoptotic effect on glutamate-treated human-bone mesenchymal stem cells. | Lu, C. Chen, J. Q. Zhou, G. P. Wu, S.H. Guan, Y. F. Yuan, C. S. | 2008 | 南京医科大学学报(自然科学版)2008，28，12： | 2 |
| 16 | Conditions for convergence of trust region algorithms for nonsmooth optimization显示文摘 | Y. Yuan | 1985 | Mathematical Programming1985，，2： | 2 |
| 17 | Unconstrained Methods for Generalized Complementarity Problems显示文摘In this paper, the generalized complementarity problem is formulated as anunconstrained optimization problem. Our results generalize the results of [9]. The dimensionality of the unconstrained problem is the same as that of the originalproblem. If the mapping of generalized complementarity problem is differentiable, the objective function of the unconstrained problem is also differentiable. All the solutions of the original problem are global minimizers of the optimization problem.A generalized strict complementarity condition is given. Under certain assumptions, local properties of the correspondent unconstrained optimization problemare studied. Limited numerical tests are also reported. | J.M. Peng Y. Yuan(State Key Laboratory of Scientific and Engineering Conputing, ICMSEC, Chinese Academy of Sciences, Beijing, China) | 1997 | Journal of Computational Mathematics1997，15，3： | 2 |
| 18 | Distributed Control Protocols for Wavelength Reservation and their Performance Evaluation显示文摘 | X. Yuan R. Melhem R. Gupta Y. Mei C. Qiao | 1999 | Photonic Network Communication1999，，3： | 1 |
| 19 | A trust region algorithm for equality constrained optimization显示文摘 | M. J. D. Powell Y. Yuan | 1990 | Mathematical Programming (-)1990，，1： | 1 |
| 20 | 查看详情显示文摘 | Yuan J. X Wang E. J Chen Y. M Yang W.S.Yao J.H.Cao Y.A | | 0，，： | 1 |
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