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Search Results: 1 - 10 of 27597 matches for " Xiu Yuan "
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Online One-End Fault Location Algorithm for Parallel Transmission Lines  [PDF]
Wanjing Xiu, Yuan Liao
Smart Grid and Renewable Energy (SGRE) , 2011, DOI: 10.4236/sgre.2011.24041
Abstract: Fault location and distance protection are essential smart grid technologies ensuring reliability of the power system. This paper describes an accurate algorithm for locating faults on double-circuit transmission lines. The proposed approach is capable of identifying the faulted circuit of a parallel transmission line by checking the estimated fault location and fault resistance. Voltage and current measurements from only one of the terminals of the faulty line are used. No pre-fault data are required for the estimation. The lumped parameter line model considering shunt capacitance is utilized for the derivation of the algorithm. It’s assumed that line parameters are known and transmission lines are fully transposed. The method is applicable to all types of faults. It’s evinced by evaluation studies that the proposed algorithm can correctly determine the faulted circuit in most cases. For exceptional cases, the current waveforms during the fault can be used to help identify the faulted circuit. The proposed algorithm generates quite accurate fault location estimates, and may be suitable for distance relaying.
Kaposi's Sarcoma-Associated Herpesvirus ORF45 Interacts with Kinesin-2 Transporting Viral Capsid-Tegument Complexes along Microtubules
Narayanan Sathish,Fan Xiu Zhu,Yan Yuan
PLOS Pathogens , 2009, DOI: 10.1371/journal.ppat.1000332
Abstract: Open reading frame (ORF) 45 of Kaposi's sarcoma-associated herpesvirus (KSHV) is a tegument protein. A genetic analysis with a null mutant suggested a possible role for this protein in the events leading to viral egress. In this study, ORF45 was found to interact with KIF3A, a kinesin-2 motor protein that transports cargoes along microtubules to cell periphery in a yeast two-hybrid screen. The association was confirmed by both co-immunoprecipitation and immunoflorescence approaches in primary effusion lymphoma cells following virus reactivation. ORF45 principally mediated the docking of entire viral capsid-tegument complexes onto the cargo-binding domain of KIF3A. Microtubules served as the major highways for transportation of these complexes as evidenced by drastically reduced viral titers upon treatment of cells with a microtubule depolymerizer, nocodazole. Confocal microscopic images further revealed close association of viral particles with microtubules. Inhibition of KIF3A–ORF45 interaction either by the use of a headless dominant negative (DN) mutant of KIF3A or through shRNA-mediated silencing of endogenous KIF3A expression noticeably decreased KSHV egress reflecting as appreciable reductions in the release of extracellular virions. Both these approaches, however, failed to impact HSV-1 egress, demonstrating the specificity of KIF3A in KSHV transportation. This study thus reports on transportation of KSHV viral complexes on microtubules by KIF3A, a kinesin motor thus far not implicated in virus transportation. All these findings shed light on the understudied but significant events in the KSHV life cycle, delineating a crucial role of a KSHV tegument protein in cellular transport of viral particles.
Antagonism of Host Antiviral Responses by Kaposi's Sarcoma-Associated Herpesvirus Tegument Protein ORF45
Fan Xiu Zhu,Narayanan Sathish,Yan Yuan
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0010573
Abstract: Virus infection of a cell generally evokes an immune response by the host to defeat the intruder in its effort. Many viruses have developed an array of strategies to evade or antagonize host antiviral responses. Kaposi's sarcoma-associated herpesvirus (KSHV) is demonstrated in this report to be able to prevent activation of host antiviral defense mechanisms upon infection. Cells infected with wild-type KSHV were permissive for superinfection with vesicular stomatitis virus (VSV), suggesting that KSHV virions fail to induce host antiviral responses. We previously showed that ORF45, a KSHV immediate-early protein as well as a tegument protein of virions, interacts with IRF-7 and inhibits virus-mediated type I interferon induction by blocking IRF-7 phosphorylation and nuclear translocation (Zhu et al., Proc. Natl. Acad. Sci. USA. 99:5573-5578, 2002). Here, using an ORF45-null recombinant virus, we demonstrate a profound role of ORF45 in inhibiting host antiviral responses. Infection of cells with an ORF45-null mutant recombinant KSHV (BAC-stop45) triggered an immune response that resisted VSV super-infection, concomitantly associated with appreciable increases in transcription of type I IFN and downstream anti-viral effector genes. Gain-of-function analysis showed that ectopic expression of ORF45 in human fibroblast cells by a lentivirus vector decreased the antiviral responses of the cells. shRNA-mediated silencing of IRF-7, that predominantly regulates both the early and late phase induction of type I IFNs, clearly indicated its critical contribution to the innate antiviral responses generated against incoming KSHV particles. Thus ORF45 through its targeting of the crucial IRF-7 regulated type I IFN antiviral responses significantly contributes to the KSHV survival immediately following a primary infection allowing for progression onto subsequent stages in its life-cycle.
Partitioning the effects of environmental and spatial heterogeneity on distribution of plant diversity in the Yellow River Estuary
Xiu Yuan,KeMing Ma,De Wang
Science China Life Sciences , 2012, DOI: 10.1007/s11427-012-4338-3
Abstract: For successful conservation and restoration of biodiversity, it is important to understand how diversity is regulated. In the ecological research community, a current topic of interest is how much of the variation in plant species richness and composition is explained by environmental variation (niche-based model), relative to spatial processes (neutral theory). The Yellow River Estuary (YRE) is a newly formed and fragile wetland ecosystem influenced by both the Yellow River and Bohai Bay. Here, we applied variance partitioning techniques to assess the relative effects of spatial and environmental variables on species richness and composition in the YRE. We also conducted a species indicator analysis to identify characteristic species for three subestuaries within the YRE. Partial redundancy analysis showed that the variations in species richness and composition were explained by both environmental and spatial factors. The majority of explained variation in species richness and composition was attributable to local environmental factors. Among the environmental variables, soil salinity made the greatest contribution to species abundance and composition. Soil salinity was the most important factor in the Diaokou subestuary, while soil moisture was the most important factor influencing species richness in the Qingshui and Chahe subestuaries. The combined effects of soil salinity and moisture determined species richness and composition in the wetlands. These results increase our understanding of the organization and assembly of estuarine plant communities.
Cryptanalysis of Two Nonrepudiable Threshold Proxy Signature Schemes
Qi Xie,Xiu-Yuan Yu
International Journal of Network Security , 2006,
Abstract: This paper will show that Hsu and Wu's efficient nonrepudiable threshold proxy signature scheme with known signers and Yang, Tzeng and Hwang's efficient nonrepudiable threshold proxy signature scheme with known signers are insecure. The malicious original signer can forge a valid threshold proxy signature for any message and any warrant after getting a valid proxy signature. In addition, since Yang et al.'s scheme is more efficient than Hsu and Wu's scheme in terms of computational complexities and communication costs, this paper only presents a simple countermeasure to improve Yang et al.'s scheme.
Effects of an InGaAs Cap Layer on the Optical Properties of InAs Quantum Dot Molecules

TIAN Peng,HUANG Li-Rong,YUAN Xiu-Hua,HUANG De-Xiu,

中国物理快报 , 2011,
Abstract:
Fuzzy Decision Trees with Possibility Distributions as Output
输出为可能性分布的模糊决策树

YUAN Xiu-Jiu ZHANG Wen-Xiu,
袁修久
,张文修

计算机科学 , 2003,
Abstract: More than one possible classifications for a given instance is supposed. A possibility distribution is assigned at a terminal node of a fuzzy decision tree. The possibility distribution of given instance with known value of attributes is determined by using simple fuzzy reasoning. The inconsistency in determining a single class for a given instance diminishes here.
Effects of temperature on the expression of STN7 and phosphorylation of LHCII proteins in Arabidopsis thaliana
Yuan Hu,Xiu Gao,JiaHong Jiang,Yan Ran,LinFang Du
Chinese Science Bulletin , 2008, DOI: 10.1007/s11434-008-0354-x
Abstract: In Arabidopsis thaliana, STN7 kinase is required for phosphorylation of LHCII and for state transitions. In this paper, a hydrophilic polypeptide, derived from the amino acid sequence of STN7, was conjugated to a carrier protein, bovine serum albumin (BSA), to obtain the polyclonal antibody. Immunogenicity and specificity of the polyclonal antibody were evaluated by agar gel immunodiffusion (AGID) test and Western blot analysis. The results show that besides the phosphorylation of LHCII proteins, also the expression of STN7 was regulated by temperature conditions. In addition, the change tendency of LHCII proteins phosphorylation was not only coherent with expression of STN7 with respect to increasing temperature, but also closely related to state transitions. These results would provide useful information for studying regulatory mechanism of LHCII proteins phosphorylation and expression of STN7.
The Development of Petroleum Microbiology in Institute of Microbiology, Chinese Academy of Sciences
石油微生物学在中国科学院微生物研究所的发展

WANG Xiu-Yuan,
王修垣

微生物学通报 , 2008,
Abstract: A full and accurate review involved microbial prospecting of petroleum and gaseous hydro- carbon-oxidating bacteria, microorganisms and formation of petroleum and gas, production of organic acids, oil field microorganisms and enhancement of oil recovery. Hundred and five papers are quoted.
Attribute Reductions in Fuzzy Inconsistent Information Systems
模糊目标信息系统的属性约简

YUAN Xiu-jiu,
袁修久

系统工程理论与实践 , 2004,
Abstract: 利用粗糙模糊集的概念定义了模糊目标信息系统的α下(上)分配约简,并讨论了它们同下(上)近似约简、下(上)最大分布约简的关系.相应于下(上)近似约简、下(上)最大分布约简和α下(上)分配约简给出了把模糊目标信息系统变换成对应的一致目标信息系统的方法.证明了变换前的模糊目标信息系统的下(上)近似约简、下(上)最大分布约简和α下(上)分配约简同变换后的对应的一致目标信息系统的属性约简是相同的,从而求模糊目标信息系统的属性约简可转化为求一致目标信息系统的约简.
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