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A comparative study of seismic provisions between International Building Code 2003 and Uniform Building Code 1997

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Earthquake Engineering and Engineering Vibration 2006年第1期5卷 49-60页

作者： Wenshen Pong Zu-hsu Lee Anson Lee School of Engineering San Francisco State University San Francisco CA 94132 USA Department of Management and Information Systems Montclair State University Montclair NJ 07043 USA

This study focuses on the comparison of the Uniform Building Code （UBC） 1997 and International Building Code （IBC） 2003 in relation to the seismic design and analysis of special steel moment resisting frame buildings （SMRF）. This paper formulates a numerical study of a steel SMRF building, studied in four different situations, namely： as an office building in San Francisco; as an office building in Sacramento; as an essential facility in San Francisco, and as an essential facility in Sacramento. The analytical results of the model buildings are then compared and analyzed taking note of any significant differences. This case study explores variations in the results obtained using the two codes, particularly the design base shear and drift ratios as they relate to different locations and occupancy use. This study also proves that IBC 2003 is more stringent for the redundancy factor under design category E for the SMRF building, and drift limits for essential facilities.

关键词： Uniform Building Code 1997 International Building Code 2003 building periods special moment resisting frame redundancy factor

Hole-Buffer Material Derived from Pyrene, Schiff Base and Tris to Enhance Emission Efficiency of Polymer Light-Emitting Diodes

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Journal of Materials Science and Chemical Engineering 2018年第3期6卷 31-46页

作者： Jyun-Huei Liou ping-Feng hsu Yun Chen Department of Chemical Engineering National Cheng Kung University Taiwan

Inserting a hole-buffer layer is an effective way to enhance emission efficiency of electroluminescence devices. We have successfully synthesized a new hole-buffer material PSB composed of pyrene, Schiff base and trihydroxy tert-butyl groups by the Suzuki-coupling reaction. The HOMO and LUMO lev-els were -6.33 eV and -2.55 eV, respectively, as estimated from cyclic volt-ammograms. In addition, homogeneous films (rms roughness ~2 nm) were readily obtained by spin-coating process. Multilayer polymer light-emitting diodes, ITO/PEDOT:PSS/PSB/SY/LiF/Al, have been fabricated using PSB as hole-buffer layer (HBL). Inserting PSB as HBL significantly enhances the per-formance (maximum luminance: 26,439 cd/m2, maximum current efficiency: 7.03 cd/A), compared with the one without PSB (9802 cd/m2, 2.43 cd/A). It is also superior to the device with conventional BCP as hole-blocking layer (ITO/PEDOT:PSS/SY/BCP/LiF/Al: 15,496 cd/m2, 5.56 cd/A). Current results strongly indicate that the PSB is a potential hole-buffer material for electrolu-minescent devices.

关键词： Hole-Buffer Polymer Light-Emitting Diodes Pyrene Schiff Base Spin-Coating

Influence of the Boreal Summer Intraseasonal Oscillation on Extreme Temperature Events in the Northern Hemisphere

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Journal of Meteorological Research 2018年第4期32卷 534-547页

作者： Yifei DIAO Tim LI Pang-Chi hsu Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environmental ChangeCollaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science &Technology International Pacific Research Center and Department of Atmospheric Sciences School of Ocean and Earth Science and Technology University of Hawaii

The impact of the boreal summer intraseasonal oscillation （BSISO） on extreme hot and cool events was investig-ated, by analyzing the observed and reanalysis data for the period from 1983 to 2012. It is found that the frequency of the extreme events in middle and high latitudes is significantly modulated by the BSISO convection in the tropics, with a 3-9-day lag. During phases 1 and 2 when the BSISO positive rainfall anomaly is primarily located over a northwest-southeast oriented belt extending from India to Maritime Continent and a negative rainfall anomaly ap- pears in western North Pacific, the frequency of extreme hot events is 40% more than the frequency of non-extreme hot events. Most noticeable increase appears in midlatitude North Pacific （north of 40°N） and higher-latitude polar region. Two physical mechanisms are primarily responsible for the change of the extreme frequency. First, an upper-tropo-spheric Rossby wave train （due to the wave energy propagation） is generated in response to a negative heating anom-aly over tropical western North Pacific in phases 1 and 2. This wave train consists of a strong high pressure anomaly center northeast of Japan, a weak low pressure anomaly center over Alaska, and a strong high pressure anomaly cen-ter over the western coast of United States. Easterly anomalies to the south of the two strong midlatitude high pres-sure centers weaken the climatological subtropical jet along 40°N, which is accompanied by anomalous subsidence and warming in North Pacific north of 40°N. Second, an enhanced monsoonal heating over South Asia and East Asia sets up a transverse monsoonal overturning circulation, with large-scale ascending （descending） anomalies over trop-ical Indian （Pacific） Ocean. Both the processes favor more frequent extreme hot events in higher-latitude Northern Hemisphere. An anomalous atmospheric general circulation model is used to confirm the tropical heating effect.

关键词： boreal summer intraseasonal oscillation extreme hot events extreme cool events Rossby wave train monsoonal circulation

AS/RS based yard and yard planning

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第8期9卷 1083-1089页

作者： Ya-hong HU Zheng-dong ZHU Wen-jing hsu College of Information Engineering Zhejiang University of Technology Hangzhou 310032 China Department of Computer Science Xi ＂an Jiaotong University Xi ＇an 710049 China School of Computer Engineering Nanyang Technological University Singapore 639798 Singapore

In this paper, we apply the split-platform automated storage/retrieval systems (SP-AS/RSs) (Hu et al., 2005) to store containers in the yard to improve the yard performance and to increase the utilization of the yard space. The layout of an SP-AS/RS based yard is described in detail. To achieve an efficient operation, we present a novel yard space allocation policy called the ‘second-carrier-based allocation policy’, which can help to alleviate the out-of-sequence problem of containers and the congestion of vehicles at the AS/RS racks. Different allocation policies are compared by an integrated container terminal simulation system. The simulation results show that the second-carrier-based policy is very efficient and has the potential to offer high terminal performance.

关键词： Container terminal Automated storage/retrieval system (AS/RS) Yard planning Transportation system

VISCOPLASTIC COLLAPSE OF SHARP-NOTCHED CIRCULAR TUBES UNDER CYCLIC BENDING

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Acta Mechanica Solida Sinica 2013年第6期26卷 629-641页

作者： Kuo-Long Lee Chien-Min hsu Wen-Fung Pan Department of Computer Application Engineering Far East University Department of Interior Design Tung Fang Design University Department of Engineering Science National Cheng Kung University

This study discusses the experimental result of the viscoplastic response and col- lapse of sharp-notched 316L stainless steel tubes with different notched depths subjected to cyclic bending. The tube bending machine and curvature-ovalization measurement apparatus were used for conducting the symmetric curvature-controlled cyclic bending. To highlight the viscoplastic behavior, three different curvature-rates, 0.0035, 0.035 and 0.35 m-1s-1, were controlled. Ob- servations of a certain curvature-rate reveal that five almost parallel lines corresponding to five different notch-depth （0.2, 0.4, 0.6, 0.8 and 1.0 mm） tubes were presented in the experimental relationship between the cyclic controlled curvature and the number of cycles needed to pro- duce buckling on a log-log scale. However, the slopes for the three different curvature-rates are different. An empirical formulation was proposed to simulate the aforementioned relationship. When comparing with the experimental findings, the simulation was in good agreement with the experimental data.

关键词： viscoplastic collapse sharp-notched circular tube cyclic bending curvature-rate ovalization

The Sac domain-containing phosphoinositide phosphatases： structure, function, and disease

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Frontiers in Biology 2013年第4期8卷 395-407页

作者： FoSheng hsu Yuxin MAO Weill Institute for Cell and Molecular Biology and Department of Molecular Biology and Genetics Cornell University Ithaca NY 14853USA

Phosphoinositides （Pls） have long been known to have an essential role in cell physiology. Their intracellular localization and concentration must be tightly regulated for their proper function. This spatial and temporal regulation is achieved by a large number of PI kinases and phosphatases that are present throughout eukaryotic species. One family of these enzymes contains a conserved PI phosphatase domain termed Sac. Although the Sac domain is homologous among different Sac domain-containing proteins, all appear to exhibit varied substrate specificity and subcellular localization. Dysfunctions in several members of this family are implicated in a range of human diseases such as cardiac hypertrophy, bipolar disorder, Down＇s syndrome, Charcot-Marie-Tooth disease （CMT） and Amyotrophic Lateral Sclerosis （ALS）. In plant, several Sac domain-containing proteins have been implicated in the stress response, chloroplast function and polarized secretion. In this review, we focus on recent findings in the family of Sac domain-containing PI phosphatases in yeast, mammal and plant, including the structural analysis into the mechanism of enzymatic activity, cellular functions, and their roles in disease pathophysiology.

关键词： lipid metabolism membrane trafficking

Damage detection of a thin plate using modal curvature via macrostrain measurement

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Earthquake Engineering and Engineering Vibration 2019年第2期18卷 409-424页

作者： Ting Yu hsu Yi Cheng Shih Quang-Vinh Pham Department of Civil and Construction Engineering Taiwan University of Science and Technology Chung-Shan Institute of Science and Technology

Plate structures are employed as important structural components in many engineering applications. Hence, assessing the structural conditions of in-service plate structures is critical to monitoring global structural health. Modal curvature-based damage detection techniques have recently garnered considerable attention from the research community, and have become a promising vibration-based structural health monitoring solution. However, computing errors arise when calculating modal curvatures from lateral mode shapes, which result from unavoidable measurement errors in the mode shapes as identified from lateral vibration signals; this makes curvature-based algorithms that use a lateral measurement only theoretically feasible, but practically infeasible. Therefore, in this study, long-gauge fiber Bragg grating strain sensors are employed to obtain a modal curvature without a numerical differentiation procedure in order to circumvent the computing errors. Several damage indices based on modal curvatures that were developed to locate beam damage are employed. Both numerical and experimental studies are performed to validate the proposed approach. However, although previous studies have reported relative success with the application of these damage indices on a simple beam, only one damage index demonstrated the capability to locate damage when the stiffness of the local region changed near the sensor.

关键词： macro strain long gauge modal curvature plate damage detection

Correlation between fragmented QRS and the short-term prognosis of patients with acute myocardial infarction

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2014年第1期15卷 67-74页

作者： Qin-hui SHENG Chih-Chi hsu Jian-ping LI Tao HONG Yong HUO Department of Cardiology Peking University First Hospital Beijing 100034 China

This study is aimed to investigate the clinical significance and the short-term prognostic value of frag- mented QRS （fQRS） for patients with acute myocardial infarction （AMI）. Three hundred patients with AMI were tested with retrospective analysis on the patients＇ clinical information, hospitalized treatment, fQRS onset time, location of lesions, and other relevant data, in order to assess the relationship between the presence of fQRS and its prognosis. The rates of malignant cardiac arrhythmia, left ventricular systolic dysfunction （LVSD）, and mortality in the positive fQRS group were 13.6%, 29.2%, and 23.7%, respectively, with all showing a p value 〈0.05. For the ST segment elevation myocardial infarction （STEMI） subgroup, all the rates showed significant differences with a p value 〈0.01, while for the non-STEMI （NSTEMI） subgroup showed no significant differences. In patients with a positive fQRS, there were no differences in malignant cardiac arrhythmia between patients with and without percutaneous coronary in- tervention （PCI）（p〉0.05）. As for the LVSD and mortality, the p values between patients with and without PCI were 0.031 and 0.000, respectively, suggesting statistical significance. The results imply that AMI patients with positive fQRS especially for the patients with STEMI had higher rates of malignant cardiac arrhythmia, LVSD, and mortality than the non-fQRS group. Patients of AMI with positive fQRS, who underwent early revascularization, could lower the incidence of the cardiovascular event. In addition, the presence of fQRS could be used as an indication of early in- tervention treatment for patients.

关键词： Fragmented QRS Acute myocardial infarction Short-term prognosis

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地球物理抗差估计和广义逆方法

地球物理学报 2000年第2期43卷 232-240页

作者：李平李平许厚泽中国科学院测量与地球物理研究所武汉430077 辽宁省地震局沈阳110031

为进行观测数据误差较大的地球物理资料的反演，引人抗差估计，称作地球物理抗差估计；为使病态方程组的反演解更可靠，又结合广义逆方法进行了算法改进．首先介绍抗差最小二乘（ＲＬＳ）的基本原理，然后推寻出适于广义逆反演方法的改... 详细信息

为进行观测数据误差较大的地球物理资料的反演，引人抗差估计，称作地球物理抗差估计；为使病态方程组的反演解更可靠，又结合广义逆方法进行了算法改进．首先介绍抗差最小二乘（ＲＬＳ）的基本原理，然后推寻出适于广义逆反演方法的改进算式，最后举例加以讨论．分析表明，抗差估计可以有效地抑制地球物理观测异常的影响，得出正常模式下的较好估计值；而用改进后的算式和广义逆反演可以使反演解更加改善，不仅如此，改进后的方法还能直接给出解估计的可靠性评价．

关键词：地球物理资料抗差最小二乘广义逆反演