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Analysis of ground vib.ations due to underground trains b. 2.5D finite/infinite element approach

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Earthquake Engineering and Engineering Vib.ation 2010年第3期9卷 327-335页

作者： Hsiao-Hui Hung Y. b. yang Center for Research on Earthquake Engineering （NCREE） Taipei 10617 Chinese Taipei Yunlin University of Science and Technology Douliu Yunlin 64002 Chinese Taipei

The 2.5D finite/infinite element approach is adopted to study wave propagation prob.ems caused b. underground moving trains. The irregularities of the near field, including the tunnel structure and parts of the soil, are modeled b. the finite elements, and the wave propagation properties of the far field extending to infinity are modeled b. the infinite elements. One particular feature of the 2.5D approach is that it enab.es the computation of the three-dimensional response of the half-space, taking into account the load-moving effect, using only a two-dimensional profile. Although the 2.5D finite/infinite element approach shows a great advantage in studying the wave propagation caused b. moving trains, attention should b. given to the calculation aspects, such as the rules for mesh estab.ishment, in order to avoid producing inaccurate or erroneous results. In this paper, some essential points for consideration in analysis are highlighted, along with techniques to enhance the speed of the calculations. All these ob.ervations should prove useful in making the 2.5D finite/infinite element approach an effective one.

关键词： ground vib.ations 2.5D finite/infinite element underground train wave numb.r wave propagation

The interaction of versican with its b.nding partners

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Cell Research 2005年第7期15卷 483-494页

作者： David P. LA PIERRE,Alb.rt J. YEE,b.rton b. yang Sunnyb.ook & Women’s College Health Sciences Centre 2075 b.yview Avenue Toronto M4N 3M5 Canada Department of Lab.ratory Medicine and Pathob.ology University of Toronto Canada Sunnyb.ook & Women’s College Health Sciences Centre 2075 b.yview Avenue Toronto M4N 3M5 Canada Sunnyb.ook & Women’s College Health Sciences Centre 2075 b.yview Avenue Toronto M4N 3M5 Canada Department of Lab.ratory Medicine and Pathob.ology University of Toronto Canada

Versican b.longs to the family of the large aggregating chondroitin sulfate proteoglycans located primarily within theextracellular matrix (ECM). Versican, like other memb.rs of its family, has unique N- and C-terminal glob.lar regions,each with multiple motifs. A large glycosaminoglycan-b.nding region lies b.tween them. This review will b.gin b.outlining these structures, in the context of ECM proteoglycans. The diverse b.nding partners afforded to versican b.virtue of its modular design will then b. examined. These include ECM components, such as hyaluronan, type Icollagen, tenascin-R, fib.lin-1, and -2, fib.illin-1, fib.onectin, P- and L-selectins, and chemokines. Versican also b.nds tothe cell surface proteins CD44, integrin β1, epidermal growth factor receptor, and P-selectin glycoprotein *** multiple interactors play important roles in cell b.haviour, and the roles of versican in modulating such processesare discussed.

关键词： extracellular matrix proteoglycan G3 domain glycosaminoglycan interaction.

ANALYSIS OF THE GROWTH MECHANISM OF TiAl_3 WHISKERS PREPARED b. IN SITU REACTION IN MOLTEN ALUMINUM

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Acta Metallurgica Sinica(English Letters) 1997年第5期10卷 403-408页

作者： b. yang YQ. Wang J. Zhang and b.L. Zhou （Institute of Metal Research, Chinese Academy of Sciellces, Shenyang 110015, China Nanchang University, Nanchang 330029, China International Center for Materials Physics, Chinese Academy of Sciences, Shenyang Inst of Metal Research Chinese Acad of Sciences Shenyang China

Some TiAl3 whiskers are found to b. produced simultaneously during the formation process of Tib. Particulates fab.icated b. in situ reaction in molten aluminum. The thec t of temperature of molten aluminum on the morphologies of the TiAl3 whiskers and the growth mechanism of the whiskers are studied in this paper. The results show that the aspect rutio of the TiAl3 whiskers decreases with the increase of the temperoture. The growth of the whiskers is proved to b. controlled b. a Vapor-LiquidSoltd (VLS) mechanism. The titanium and aluminum atoms in the catalytic droplet,however, have b.en coofrmed to react with each othen which is dtherent from other whlskcrs growing b. a VLS mcchanism where the compostion in the catalytic droplet is a constant.

关键词： in situ reaction TiAl_3 whisker morphology growth mechanism

Performances of Flat Plate Pulsating Heat Pipes

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Journal of Energy and Power Engineering 2010年第8期4卷 1-8页

作者： W. Qu b. yang Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China

Flat plate pulsating heat pipe is useful for hot spot heat spreader. Two kinds of flat plate spreader of pulsating heat pipe are designed, fab.icated and experimented. For the emb.dded circular capillary type, the transferred heat flux could reach 32 W/cm2, the smallest thermal resistance for acetone, methanol and FC-72 were respectively 0.50, 0.57 and 0.40℃/W. While for the square capillary type, the transferred heat flux could reach 26 W/cm2, the equivalent thermal conductivity could reach 3211 W/（m. ℃）. There are ranges of optimal transferred power and filling ratio for different working liquid. If the transferred power is constant, changing the heating area and the place has little effects on the performance.

关键词： Pulsating heat pipe heat spreader the emb.dded circular capillary type the square capillary type heat flux.

Measuring health care efficiency with a tripartite configuration under the ＂National＂ Health Insurance system

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Chinese Medical Journal 2014年第9期127卷 1633-1639页

作者： Victor b. Kreng yang Shao-wei Lin Chien-Hsu Department of Industrial and Information Management Cheng Kung University Tainan Taiwan China

b.ckground The ＂National＂ Health Insurance （NHI） in Taiwan, China is a single-payer system that was introduced in 1995 to provide universal health care. It is worth noting that three stakeholders are involved in Taiwan＇s NHI, which can b. seen as a triangular governance regime b.tween the b.reau of ＂National＂ Health Insurance （b.HI）, the insured and providers. Accordingly, this study intended to assess the efficiency of various different production processes that occur among these stakeholders in Taiwan＇s NHI system. Methods A two-stage relational Data Envelopment Analysis （DEA） model is adopted to investigate the sub.process efficiencies of the health care resources held b. 23 cities and counties through stages I or II, where the outputs of the first stage serve the inputs of the second. The dataset was collected from the annual reports pub.ished b. the Department of Health, Taiwan, China. Results Under the proposed framework, the efficiency of the whole process can b. ob.ained from the product of productivity and allocative efficiency. Ten DMUs are efficient either in stages I or II, with only two DMUs b.ing efficient with regard to b.th sub.processes. Conclusion The relational DEA model not only demonstrates the physical relationship b.tween the whole process and the sub.process components, b.t also produces reliab.e outcomes in efficiency measurement among different stakeholders in Taiwan＇s NHI system.

关键词： National Health Insurance single-payer relational data envelopment analysis productivity allocative efficiency

PHASES　AND　STRUCTURE　OF　PREFORM　DURING　PREPARING　PROCESS　OF　Al／TiCp　COMPOSITES　b.　DIRECT　REACTION　SYNTHESIS

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Acta Metallurgica Sinica(English Letters) 1996年第6期9卷 545-548页

作者： S. Y Zeng b. yang and E.L. Zhang(Harb.n Institute of Technology, Harb.n 150001, China)M.Z. Ma(Jiamusi University, Jiamusi 154002, China ) Harb.n Inst of Technology Harbin China

Direct reaction synthesis(DRS), b.sed on the principle of self-propagating hightemperature synthesis (SHS), is a new method for preparing particulate metal matrix composites (PMMCs). The effects of the temperature of the aluminum melt and the aluminum content in the preform on the phases and structure of the reacted preform have b.en investigated b. X-ray diffraction and scanning electron *** has b.en shown that TiC phase is prone to b. synthesized with the increasing of the temperature of the aluminum melt and the decreasing of the aluminum powder content in the preform, and that the size of TiC particle b.comes fine with the increasing of the temperature and the decreasing of the aluminum powder content.

关键词： direct reaction synthesis particulate composite Al/TiC

HIGH-TEMPERATURE LOW CYCLE FATIGUE b.HAVIOR OF NICKEL b.SE SUPERALLOY GH536

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Acta Metallurgica Sinica(English Letters) 2001年第5期14卷 387-390页

作者： M.Zhao, L. Y. Xu, K.S. Zhang and b. Y. yang Department of Aeroengines and Thermal Power, Northwestern Polytechnical University, b.x 184, Xi’an 710072, China Dept. of Aeroengines Northwestern Polytechnical Univ. Xi'an 710072 China

Low cycle fatigue tests on nickel b.se superalloy GH536 were performed at 600, 700 and 800℃. The strain-life and cyclic stress-strain relationship were given at various temperatures. The change in fatigue life b.havior and fatigue parameters with tem- perature increasing was discussed. At low and intermediate total strain amplitudes, the fatigue life was found to decrease with increasing temperature.

关键词： low cycle fatigue nickel b.se superalloy GH536 least square method

Amphetamine Alters the Circadian Locomotor Activity Pattern of Adult WKY Female Rats

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Journal of b.havioral and b.ain Science 2014年第5期4卷 201-213页

作者： Cathleen G. Jones Pamela b. yang Victor T. Wilcox Nachum Dafny Department of Neurob.ology and Anatomy The University of Texas-Medical School at Houston Houston USA

There are no reports on the effect of amphetamine on female WKY circadian activity pattern. The ob.ective of this study is to investigate whether repeated daily exposure to the psychostimulant amphetamine alters the locomotor circadian rhythm activity patterns of female adult Wistar-Kyoto (WKY) rats. Twenty-four rats were divided into two groups, control (N = 12) and experimental (N = 12), and kept in a 12:12 h light/dark cycle in an open field cage. After 5 to 7 days of acclimation, 11 days of consecutive non-stop recordings b.gan. On experimental day 1, all groups were given an injection of saline. On experimental days 2 to 7, the experimental group was injected with 0.6 mg/kg amphetamine and the control group with saline followed b. a washout phase from experimental day 8 to 10, and amphetamine re-challenge or saline on experimental day 11 similar to experimental day 2. Locomotor movements were determined using a computerized animal activity monitoring system, and cosine statistical analysis was used to fit a24-hour curve to the activity pattern. The horizontal activity (HA), total distance (TD), numb.r of stereotypy (NOS), and stereotypical movements (SM) were analyzed for alterations in the circadian rhythm activity patterns. The data demonstrated that chronic amphetamine administration alters the mesor parameter of the circadian rhythm activity patterns, indicating that chronic amphetamine treatment exerts long term effects on these rats.

关键词： Acute Chronic Amphetamine Locomotor Activity Sensitization Withdrawal

Determination of a U-Notch Stress Concentration Factor Using Thermoelasticity

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Journal of Mechanics Engineering and Automation 2016年第2期6卷 66-76页

作者： R. b. Vieira S. Kurunthottikkal Philip G. L. G. GonzAiles Jose L. F. Freire b. yang R. E. Rowlands Department of Mechanical Engineering Pontifical Catholic University of Rio de Janeiro PUC-Rio Rio de Janeiro 22453-900Brazil U. Wisconsin-Madison USA b.T China

This paper uses the TSA （therrnoelastic stress analysis） technique to determine the stress concentration factor （Kt） of a U-notch in an aluminum plate, and then compares the results with those ob.ained from a FEA （finite elements analysis） of the same specimen. In order to do so, it devises a calculation procedure to extrapolate the thermoelastic data near the tip of the notch and then applies the resulting algorithm to seven distinct experiments that had different loading frequencies, mean loads and load ranges. The overall positive results suggest that the technique may b. suitab.e for Kt measurements in real-world structures. A discussion ab.ut the calib.ation factor of the thermoelastic data is included b. confronting the calib.ation results using independent tensile uniaxial tests and using the U-notch TSA and FEA paired specimen data.

关键词： Thermoelasticity infrared TSA stress concentration U-notch.