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543篇 您的检索式:作者名="PEI T"
    题名 作者 年代 出处 被引量
1割集功率空间上静态电压稳定域的实用边界显示文摘提出了电力系统在割集功率空间上静态电压稳定域边界的实用表达方法。用临界割集将系统分为地理上互不连通的两部分,即相对集中的弱节点区域和非弱节点区域,利用连续潮流,搜索大量的电压稳定临界点,以临界割集上线路的有功和无功潮流为坐标,并通过最小二乘法,将获得的临界点以超平面的形式拟合出电压稳定域的边界,其误差可满足工程应用的要求。这种方法既达到了使复杂电力系统降维的目的,又方便了运行人员监视系统稳定性。同时,电压稳定域边界以超平面形式表示,为电力系统的在线安全分析、评估和优化提供了简明、方便的解析工具。该方法在IEEE 14节点、IEEE 39节点、IEEE 118节点等系统和EPRI 1000节点系统的算例中得到了很好的验证,均以较小误差满足工程需要。李慧玲 余贻鑫 韩琪 宿吉锋 赵金利 Stephen T LEE Pei ZHANG 2005电力系统自动化2005,29,4:32
2静态电压稳定域边界的非线性近似解析表达显示文摘在电力系统控制决策与运行分析中,对系统稳定运行区域的边界面几何形状的认识具有重要的意义。文中对注入功率空间中静态电压稳定域边界面(即潮流可解域边界)的二次特性进行了深入的探讨。通过对潮流方程雅可比矩阵的行列式在临界点附近进行泰勒级数展开并保留二次项,得到了计及非线性项的边界近似解析表达式。在计算过程中应用了潮流方程特征值和特征向量灵敏度系数的计算。该方法的优点是算法本身不涉及任何非线性方程的迭代求解,且所提出的非线性解析表达式能在大范围内较好地逼近真实稳定域边界。通过IEEE系统的算例对所提出的方法的精确性进行了验证。韩琪 余贻鑫 贾宏杰 李鹏 Stephen T LEE Pei ZHANG 2005电力系统自动化2005,29,11:22
3复功率注入空间中电力系统的实用动态安全域显示文摘为研究复功率注入空间中实用动态安全域的边界性质,针对多个典型电力系统,通过大量的仿真研究表明,在网络中不同位置发生持续不同时间的短路事故时,复功率注入空间中暂态稳定的临界点的集合可以使用一个或极少数几个超平面来近似描述.在包含暂态电压失稳现象的稳定问题研究中,复功率空间中的实用动态安全域具有更好的精度.文中详细讨论了这些近似描述与真实边界之间的差异并发现了实用动态安全域边界的迁移规律,上述研究大大拓宽了实用动态安全域适用的范围.最后通过对某电力大系统实用动态安全域的研究,验证了上述结论.余贻鑫 董存 LEE Stephen T ZHANG Pei 2006天津大学学报2006,39,2:11
4Bacterial biota in reflux esophagitis and Barrett's esophagus显示文摘AIM: To identify the bacterial flora in conditions such as Barrett's esophagus and reflux esophagitis to determine if they are similar to normal esophageal flora.METHODS: Using broad-range 16S rDNA PCR,esophageal biopsies were examined from 24 patients [9with normal esophageal mucosa, 12 with gastroesophageal reflux disease (GERD), and 3 with Barrett's esophagus].Two separate broad-range PCR reactions were performed for each patient, and the resulting products were cloned.In one patient with Barrett's esophagus, g9 PCR clones were analyzed.RESULTS: Two separate clones were recovered from each patient (total = 48), representing 24 different species, with 14 species homologous to known bacteria,5 homologous to unidentified bacteria, and 5 were not homologous (<97% identity) to any known bacterial 16S rDNA sequences. Seventeen species were found in the reflux esophagitis patients, 5 in the Barrett's esophagus patients, and 10 in normal esophagus patients.Further analysis concentrating on a single biopsy from an individual with Barrett's esophagus revealed the presence of 21. distinct bacterial species. Members of four phyla were represented, including Bacteroidetes,Firmicutes, Proteobacteria, and Actinobacteria.Microscopic examination of each biopsy demonstrated bacteria in intimate association with the distal esophageal epithelium, suggesting that the presence of these bacteria is not transitory.CONCLUSION: These findings provide evidence for a complex, residential bacterial population in esophageal reflux-related disorders. While much of this biota is present in the normal esophagus, more detailed comparisons may help identify potential disease associations.Zhiheng Pei Liying Yang Richard M Peek Jr Steven M Levine David T Pride Martin J Blaser 2005World Journal of Gastroenterology2005,11,46:11
5失稳模态识别方法及其在动态安全域中的运用显示文摘提出了一种快速识别初始运行点附近失稳模态的方法,该方法基于大量计算观察到的初始运行点附近不同运行点注入下模型的可达性格纳姆矩阵元素近乎不变的性质,将基于K-中心点算法的同调识别和初加速度法相结合,快速识别初始运行点附近的失稳模态,为实用动态安全域(PDSR)直接法提供了临界点搜索建议,改善了PDSR法。该方法的有效性在New England 10机39节点系统得到了验证。闵亮 余贻鑫 Stephen T Lee Pei Zhang 2004电力系统自动化2004,28,11:9
6电力系统实用动态安全域的降维与还原显示文摘提出了一种在注入功率空间中求取电力系统实用动态安全域(PDSR)的超平面形式的临界稳定边界的新方法。通过对电力系统进行数值仿真搜索到大量临界点,并通过最小二乘法拟合得到临界超平面的方法精确但费时,难以实际应用。为了在重要的预想事故下快速、准确地求取电力系统的临界超平面,文中提出首先将高维的电力系统通过基于相关的动态等值化简为低维的等值系统,再对其进行数值仿真,拟合出等值系统的临界超平面,然后根据动态等值逆过程推导出超平面还原的解析表达式,最后修正还原得到超平面的系数,使所得到的超平面通过一个由对原系统的详细模型进行仿真得到的临界点,可以在一定程度上改善临界超平面的精度。算例结果证明这种方法兼顾了临界超平面求取的速度与精度,使PDSR在实时安全性分析中的应用更易实现。侯科峰 余贻鑫 Stephen T Lee Pei Zhang 2004电力系统自动化2004,28,23:3
7Consensus recommendations and review by an International Expert Panel on Interventions in Hepatocellular Carcinoma ( EPOIHCC )显示文摘Joong‐Won Park Deepak Amarapurkar Yee Chao Pei‐Jer Chen Jean‐Francois H. Geschwind Khean Lee Goh Kwang‐Hyub Han Masatoshi Kudo Han Chu Lee Rheun‐Chuan Lee Laurentius A. Lesmana Ho Yeong Lim Seung Woon Paik Ronnie T Poon Chee‐Kiat Tan Tawesak Tanwandee Gao 2013Liver Int2013,,3:2
8The evolution of microstructure in a laser clad TiB-Ti composite coating 显示文摘KOOI B J PEI Y T DE HOSSON J Th M 2003Acta Mater2003,51,2:2
9A quick evaluating method for automotive fuel cell lifetime 显示文摘PEI P C CHANG Q F TANG T 2008International Journal of Hydrogen Energy2008,33,:1
10Somatic PKD2 mutations in individual kidney and liver cysts support a 'two-hit'model for cystogenesis in type 2 autosomal polycystic kidney disease显示文摘Pei Y Watnick T He N 1999J Am Soc Nephrol1999,10,:1
11显示文摘Pei S Kleefisch M S Kobylinski T P 1994Catalysis Letters1994,30,14:1
12Separation and miner- alogical analysis of bayer red mud 显示文摘PICARO PEI T KANE B 2002Developments in Chemical Engineering and MineralPro cessing2002,,10:1
13Study on magnetite nanoparticles synthesized by chemical method显示文摘W Pei H Kumada T Natusme H Saito S Ishio 2007Journal of Magnetism and Magnetic Materials2007,310,:1
14Functionally Graded Materials Produced by Laser Cladding显示文摘Y T pei J TH M DE hosson 2000Functionally Graded Materials2000,,48:1
15Gradient microstructure in laser clad TiC-reinforced Ni-alloy composite coating显示文摘Pei Y T Zuo T C 1998Materials Science and Engineering1998,241,12:1
16CD137 ligand-mediated reverse signaling inhibits proliferation and induces apoptosis in non-small cell lung cancer显示文摘Qian Y Pei D Cheng T 2015Med Oncol2015,32,3:1
17Inhibition of microglial activation by the herbal flavonoid baicalein attenuates inflammation-mediated degeneration of dopaminergic neurons 显示文摘Li F Q Wang T Pei Z 2005J Neural Transm2005,112,:1
18Probabilistic load flow computation using the method of combined cumulants and gram-chariier expansion 显示文摘ZHANG Pei STEPHEN T L 2004IEEE Transactions on Power Systems2004,19,1:1
19Gradient microstructure in laser clad TiC - reinforced Ni - alloy composite coating显示文摘Y T Pei T C Zuo 1998Materials Science and Engineering1998,241,:1
20Frequency planning scheme based on interference coordination for OFDM-relay systems显示文摘PEI Y TIAN H WU T 2011IEEE Communications Letters2011,15,1:1
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