|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 基于分布式最大功率跟踪的光伏系统输出特性分析显示文摘分布式最大功率跟踪(DMPPT)光伏系统可以有效地抑制实际环境中因为光照不均影响所造成的产电率下降的问题。以DMPPT的光伏系统为研究对象,针对多个分布式最大功率跟踪模块组网的优化问题,基于系统静态输出特性对多个光伏优化模块级联的结构进行了分析,提出了一种新型的DMPPT光伏系统结构。通过分析和研究,阐明了光照条件、系统结构及单个光伏优化模块本身限压值、限流值等参数与光伏阵列最大输出功率之间的关系。所提出的新型DMPPT光伏系统结构可以保证在不同的光照条件下每块光伏板都可以工作在各自的最大功率点,该结构有效地提高了光伏阵列在失配问题下产电率,并且适用于高电压母线系统。最后搭建了实验平台,通过硬件实验平台验证了所提出的新型DMPPT光伏系统结构对光伏系统产电率的优化效果。 | 王丰 孔鹏举 Fred C.Lee 卓放 | 2015 | 电工技术学报2015，30，24： | 27 |
| 2 | 嵌入式智能光伏模块的最大功率输出统一控制显示文摘传统的太阳能系统经常会因为实际应用环境中的不匹配问题和光照不均现象而影响效率。分布式最大功率跟踪(distributed max power point tracking,DMPPT)概念的提出有效地抑制了这种影响。在分布式最大功率跟踪的基础上,该文提出一种嵌入式智能光伏模块(sub-panel MPPT converter,SPMC),利用非隔离的DC-DC变换器替代传统太阳能板接线盒中的旁路二极管,通过输出侧统一的最大功率计算单元对输入侧进行的指令信号控制,可以有效地消除太阳能板因为不匹配问题所带来的能量损失。文中首先对所提出智能光伏模块的拓扑结构进行分析、比较。然后以BUCK型的嵌入式智能光伏模块提出统一输出最大功率跟踪控制策略,这种控制策略在保证输出功率最大化的前提下,优化了系统模块,有效降低了系统控制复杂度和装置成本。最后,文章通过实验验证了所提出的概念和控制方法。 | 王丰 吴新科 Fred C.Lee 卓放 | 2013 | 中国电机工程学报2013，33，21： | 22 |
| 3 | 预防性中央区淋巴结清扫治疗甲状腺乳头状癌的利与弊显示文摘对甲状腺乳头状癌(PTC)的患者是否行预防性的中央区淋巴结清扫(pCND)是存在争议的。相比于其他恶性肿瘤而言,PTC患者有较好的整体生存率,但由于淋巴结的转移而导致局部复发也是治疗的一个难点。与颈侧区淋巴结转移不同,中央区淋巴结转移在术前评估中不易被发现,并且第1次术后如中央区的病灶复发或残留可能需再次手术治疗,但是出现手术并发症的风险将增加。由于中央区淋巴结在位置上属于甲状腺切除术的区域内,所以行pCND可以减少复发的风险及再次手术的需要,但也需要衡量患者的风险及获益。笔者将通过长期的治疗效果来讨论pCND的优势及劣势,同时也将对pCND的合理性,单或双侧pCND的指征及常规行pCND和复发再手术的比较进行讨论。分子标志物在高危患者中的应用及患者术后生存质量的研究也有所提及。 | Anthony R.Glover Justin S.Gundara Olov Norlén James C.Lee Stan B.Sidhu 冯铁成 李新营 | 2014 | 中国普通外科杂志2014，23，5： | 10 |
| 4 | Cyclic performance and simplified pushover analyses of precast segmental concrete bridge columns with circular section显示文摘In recent years, precast segmental concrete bridge columns became prevalent because of the benefits of accelerated construction, low environmental impact, high quality and low life cycle costs. The lack of a detailed configuration and appropriate design procedure to ensure a comparable performance with monolithic construction has impeded this structural system from being widely used in areas of high seismicity. In this study, precast segmental bridge column cyclic loading tests were conducted to investigate the performance of unbonded post-tensioned segmental bridge columns. One monolithic and two precast segmental columns were tested. The precast segmental column exhibited minor damage and small residual displacement after the maximum 7% cyclic drift; energy dissipation(ED) can be enhanced byadding ED bars. The experimental results were modeled by a simplified pushover method(SPOM), as well as a fiber model(FIBM) finite element method. Forty-five cases of columns with different aspect ratios, axial load ratios and ED bar ratios were analyzed with the SPOM and FIBM, respectively. Using these parametric results, a simplified design method was suggested by regressive analysis. Satisfactory correlation was found between the experimental results and the simplified design method for precast segmental columns with different design parameters. | Bu Zhanyu Guo Jian Zheng Rongyue Song Jianwei George C.Lee | 2016 | Earthquake Engineering and Engineering Vibration2016，15，2： | 8 |
| 5 | Towards multiple hazard resilient bridges:a methodology for modeling frequent and infrequent time-varying loads Part I,Comprehensive reliability and partial failure probabilities显示文摘The current AASHTO load and resistance factor design (LRFD) guidelines are formulated based on bridge reliability,which interprets traditional design safety factors into more rigorously deduced factors based on the theory of probability.This is a major advancement in bridge design specifications.However,LRFD is only calibrated for dead and live loads.In cases when extreme loads are significant,they need to be individually assessed.Combining regular loads with extreme loads has been a major challenge,mainly because the extreme loads are time variables and cannot be directly combined with time invariant loads to formulate the probability of structural failure.To overcome these difficulties,this paper suggests a methodology of comprehensive reliability,by introducing the concept of partial failure probability to separate the loads so that each individual load combination under a certain condition can be approximated as time invariant.Based on these conditions,the extreme loads (also referred to as multiple hazard or MH loads) can be broken down into single effects.In Part Ⅱ of this paper,a further breakdown of these conditional occurrence probabilities into pure conditions is discussed by using a live truck and earthquake loads on a bridge as an example.There are three major steps in establishing load factors from MH load distributions:(1) formulate the failure probabilities;(2) normalize various load distributions;and (3) establish design limit state equations.This paper describes the formulation of the failure probabilities of single and combined loads. | Zach Liang George C.Lee | 2012 | Earthquake Engineering and Engineering Vibration2012，11，3： | 8 |
| 6 | Dynamic responses under the excitation of pulse sequences显示文摘This paper studies the dynamic responses of SDOF system under pulse-dominant excitations. The purpose of the study is to prepare for scrutiny of some near-field pulse-dominant ground motions and their potential to cause structural damage. Extending the single pulse dynamics, we consider the effect of pulse sequences. This kind of excitation was particularly obvious in some of previous earthquakes such as Northridge (1994) and Chi-Chi (1995). Based on the duration,peak and rise and decay era of the main pulse as well as its relationship with the predecessor and successor pulses, we propose a classification for the pulse sequences. Consequent studies have been carried out for acceleration, velocity and displacement response spectra of the main pulse with either a predecessor or a successor pulse. The analysis also includes general response behaviors in different fundamental period segments and special aspects of response at certain points (e.g., the corresponding peak points). | 戴君武 Mai Tong George C.Lee 齐霄斋 白文婷 | 2004 | Earthquake Engineering and Engineering Vibration2004，3，2： | 7 |
| 7 | Force-based and displacement-based reliability assessment approaches for highway bridges under multiple hazard actions显示文摘The strength limit state of American Association of State Highway and Transportation Officials(AASHTO) Load and Resistance Factor Design(LRFD) Bridge Design Specifications is developed based on the failure probabilities of the combination of non-extreme loads.The proposed design limit state equation(DLSE) has been fully calibrated for dead load and live load by using the reliability-based approach. On the other hand, most of DLSEs in other limit states, including the extreme events Ⅰ and Ⅱ, have not been developed and calibrated though taking certain probability-based concepts into account. This paper presents an assessment procedure of highway bridge reliabilities under the limit state of extreme eventⅠ, i. e., the combination of dead load, live load and earthquake load. A force-based approach and a displacement-based approach are proposed and implemented on a set of nine simplified bridge models. Results show that the displacement-based approach comes up with more convergent and accurate reliabilities for selected models, which can be applied to other hazards. | Chao Huang Jerry J.Shen Mi Zhou George C.Lee | 2015 | Journal of Traffic and Transportation Engineering(English Edition)2015，2，4： | 6 |
| 8 | 桥梁多灾害设计荷载系数确定方法探讨显示文摘目前美国的桥梁设计多采用荷载与抗力系数法规范(LRFD),其荷载系数和抗力系数是以概率为基础的极限状态方程的形式求得的。荷载与抗力系数规范(LRFD)主要标定常规荷载和单个极端荷载,没有考虑多个极端荷载的情况,而且LRFD对于单个极端荷载的考虑并没有基于概率基础。该文针对多种极端荷载下荷载系数设计存在的问题,将多种极端荷载视为随机过程,以失效概率为纽带,提出荷载系数设计的分项失效概率概念。基于LRFD极限状态方程的形式,提出解决多种极端荷载作用下的MH-LRFD荷载系数计算方法,并给出当仅有两种极端荷载下,桥梁结构多灾害设计荷载系数的一般计算步骤。 | 孙得璋 孙柏涛 George C.Lee | 2012 | 土木工程学报2012，45，S2： | 5 |
| 9 | 基于Ferry Borges理论的地震与重卡车作用下桥梁内力的组合问题显示文摘目前的AASHTO LRFD桥梁规范主要考虑重力荷载和卡车等活荷载的组合情况,而没有在概率基础上考虑地震等极端荷载的组合问题。包括LRFD在内的很多桥梁抗震规范都是主要考虑地震的作用,甚至设计时不考虑其他荷载的作用,LRFD设计指导手册中在考虑地震等极端荷载时,也只是提到在特殊情况和桥梁比较长的情况下再考虑卡车的作用,而且,也比较模糊。文中在考虑地震荷载与卡车荷载时将其视为2种随机过程函数,并分析其各自的荷载特点。结合最近一些年USGS收集的极端荷载数据,文中认为桥梁设计(考虑地震和重卡车设计)时应该综合考虑地震和重卡车的影响,对它们进行荷载组合。接着,文中简单回顾了几种荷载组合方法,对比之后,认为FerryBorges(也称Ferry Borges-Castanheta模型)模型考虑了荷载的持时因素与荷载发生概率,虽然也对荷载做了极大的简化,但很好地解释了随机过程转化成随机变量以及与其他随机变量组合的复杂问题。最后,本文以美国西雅图地区的一桥梁为研究对象进行了算例分析。 | 孙得璋 孙柏涛 George C.Lee | 2011 | 地震工程与工程振动2011，31，6： | 4 |
| 10 | 用人工神经网络方法进行非能动安全壳冷却系统可靠性分析显示文摘主要介绍了利用人工神经网络方法对非能动安全壳冷却系统进行可靠性分析。采用人工神经网络方法从有限组数据样本中得到准确的关于安全壳内压力的极限表面(Limit Surface),然后用蒙特卡罗方法得到了系统在多种参数条件下的不可靠性。合理的结果证明了方法的有效性。 | 张矾 崔震华 John C.Lee | 2004 | 核科学与工程2004，24，1： | 4 |
| 11 | Highway bridge seismic design:summary of FHWA/MCEER project on seismic vulnerability of new highway construction显示文摘The Federal Highway Administration (FHWA) sponsored a large, multi-year project conducted by theMultidisciplinary Center for Earthquake Engineering Research (MCEER) titled 'Seismic Vulnerability of New HighwayConstruction' (MCEER Project 112), which was completed in 1998. MCEER coordinated the work of many researchers, whoperformed studies on the seismic design and vulnerability analysis of highway bridges, tunnels, and retaining structures.Extensive research was conducted to provide revisions and improvements to current design and detailing approaches andnational design specifications for highway bridges. The program included both analytical and experimental studies, andaddressed seismic hazard exposure and ground motion input for the U.S. highway system; foundation design and soil behavior;structural importance, analysis, and response; structural design issues and details; and structural design criteria. | Ian M.Friedland Ian G.Buckle George C.Lee | 2002 | Earthquake Engineering and Engineering Vibration2002，1，1： | 3 |
| 12 | 规范反应谱在消能减振设计中的应用显示文摘振型分析反应谱法是结构减震消能分析中的重要方法。为比较阻尼比不为5%时的反应谱与阻尼比为5%时的反应谱的情况,介绍了阻尼衰减因子B的概念,同时编制了该衰减因子与特征周期、结构自振周期及总阻尼比之间关系的表格。可方便地用于反应谱法消能减振结构的阻尼设计。 | 张树传 王亚勇 Zach Liang George C.Lee | 2008 | 建筑结构2008，38，3： | 3 |
| 13 | Cu^+-incorporated TiO_2 overlayer on Cu_2O nanowire photocathodes for enhanced photoelectrochemical conversion of CO_2 to methanol显示文摘In this paper, we report photoelectrochemical(PEC) conversion of carbon dioxide(CO_2) using photocathodes based on Cu_2O nanowires(NWs) overcoated with Cu^+-incorporated crystalline TiO_2(TiO_2–Cu^+ )shell. Cu_2O NW photocathodes show remanent photocurrent of 5.3% after 30 min of PEC reduction of CO_2.After coating Cu_2O with TiO_2–Cu^+ overlayer, the remanent photocurrent is 27.6%, which is an increase by5.2 fold. The charge transfer resistance of Cu_2O/TiO_2–Cu^+ is 0.423 k/cm2, whereas Cu_2O photocathode shows resistivity of 0.781 k/cm2 under irradiation. Mott–Schottky analysis reveals that Cu^+ species embedded in TiO_2 layer is responsible for enhanced adsorption of CO_2 on TiO_2 surface, as evidenced by the decrease of capacitance in the Helmholtz layer. On account of these electrochemical and electronic effects by the Cu^+ species, the Faradaic efficiency(FE) of photocathodes reaches as high as 56.5% when TiO_2–Cu^+ is added to Cu_2O, showing drastic increase from 23.6% by bare Cu_2O photocathodes. | Kangha Lee Seokwon Lee Hyunjin Cho Sunil Jeong Whi Dong Kim Sooho Lee Doh C.Lee | 2018 | Journal of Energy Chemistry2018，27，1： | 3 |
| 14 | von Hippel-Lindau相关胰腺实性肿瘤的CT筛查与随访策略中的累积辐射剂量显示文摘目的评估von Hippel-Lindau(VHL)综合征病人在CT筛查和随访扫描中潜在的电离辐射剂量。材料与方法本研究回顾分析了747例VHL综合征病人[年龄12~83岁,中位年龄(47.6±14.6)岁,女320例(42.8%)]的腹-盆(AP)和胸-腹-盆(CAP)CT扫描,病例来源于美国国立卫生研究院临床中心,收集时间为2009—2015年。 | A.Tirosh N.Journy L.R.Folio C.Lee C.Leite J.H.Yao 罗继画(译) 张杨(校) | 2019 | 国际医学放射学杂志2019，0，2： | 2 |
| 15 | Towards establishing practical multi-hazard bridge design limit states显示文摘In the U.S.,the current Load and Resistance Factor Design(LRFD) Specifications for highway bridges is a reliability-based formulation that considers failure probabilities of bridge components due to the actions of typical dead load and frequent vehicular loads.Various extreme load effects,such as earthquake and vessel collision,are not considered on the same reliability-based platform.Since these extreme loads are time variables,combining them with frequent,nonextreme loads is a significant challenge.The number of design limit state equations based on these failure probabilities can be unrealistically large and unnecessary from the view point of practical applications.Based on the opinion of AASHTO State Bridge Engineers,many load combinations are insignificant in their states.This paper describes the formulation of a criterion to include only the necessary load combinations to establish the design limit states.This criterion is established by examining the total failure probabilities for all possible time-invariant and time varying load combinations and breaking them down into partial terms.Then,important load combinations can be readily determined quantitatively. | Zach Liang George C.Lee | 2013 | Earthquake Engineering and Engineering Vibration2013，12，3： | 2 |
| 16 | Signaling pathways in osteogenesis and osteoclastogenesis:Lessons from cranial sutures and applications to regenerative medicine显示文摘One of the simplest models for examining the interplay between bone formation and resorption is the junction between the cranial bones.Although only roughly a quarter of patients diagnosed with craniosynostosis have been linked to known genetic disturbances,the molecular mechanisms elucidated from these studies have provided basic knowledge of bone homeostasis.This work has translated to methods and advances in bone tissue engineering.In this review,we examine the current knowledge of cranial suture biology derived from human craniosynostosis syndromes and discuss its application to regenerative medicine. | Justin B.Maxhimer James P.Bradley Justine C.Lee | 2015 | Genes & Diseases2015，2，1： | 2 |
| 17 | Toward an Implied Cost of Capital显示文摘 | William R.Gebhardt Charles M. C.Lee BhaskaranSwaminathan | 2002 | Journal of Accounting Research2002，，1： | 2 |
| 18 | Randomized clinical trial of single‐incision laparoscopic cholecystectomy versus minilaparoscopic cholecystectomy显示文摘 | P.‐C.Lee C.Lo P.‐S.Lai J.‐J.Chang S.‐J.Huang M.‐T.Lin P.‐H.Lee | 2010 | Br J Surg2010，，7： | 2 |
| 19 | Spontaneous tumour rupture and prognosis in patients with hepatocellular carcinoma显示文摘 | C.‐N.Yeh W.‐C.Lee L.‐B.Jeng M.‐F.Chen M.‐C.Yu | 2002 | Br J Surg2002，，9： | 2 |
| 20 | Posterior circulation ischemic stroke in Korean population显示文摘 | J.‐H.Lee S.‐J.Han Y.‐H.Yun H.‐C.Choi S.Jung S.‐J.Cho K.‐H.Yu S. M.Lee S.‐H.Hwang H.‐K.Song K. H.Kwon B.‐C.Lee | 2006 | European Journal of Neurology2006，，7： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员