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Articles by Yue Li
Total Records ( 5 ) for Yue Li
  Yan Qiang , Yue Li , Wei Wei , Bo Pei , Juanjuan Zhao and Hui Zhang
  In order to guarantee the stability of the system performance and the high Qos(quality of service) of users, a new method based on the HDFS (Hadoop Distributed File System) was proposed which including a job type classification method and a dynamic replica manage mechanism. The method uses the job type classification method to select the I/O intensive job, in order to achieve more accuracy of the classification taken the heterogeneity of the jobs into consideration. For the classified jobs, a dynamic replica manage mechanism was used to determine whether to increase or decrease the number of copies on the specific data node. For a test of a cluster with 1 namenode and 20 data nodes, the method has a high performance. The theoretical and experimental analyses in this paper prove that the proposed method has the ability to improve the performance of HDFS effectively.
  Yan Qiang , Yue Li , Wei Wei and Juanjuan Zhao
  The rapid growth of mobile apps gives rise to the challenge of discovering apps in the mobile systems while it concurrently brings the problem of intensive screen space consumption for mobile devices. To be specified, users always need scrolling screens of apps just for discovering and accessing one of them. The traditional forest fire recognition algorithm couldn't achieve low time-consuming and high accuracy at the same time. To the features of forest fire image, discussed the significance of forest fire prevention combining sea computing, studied and proposed the forest fire recognition algorithm based on sea computing. Used Qt/Embedded to design the algorithm according to the characteristics of the sensor node and then completed the judgment of color and region by this algorithm through additive color model and Sobel operator. Finally, the results were automatically fed back to the sink node. The experiments showed that, this algorithm not only completed the instant detection and recognition of forest fire but also synchronously achieved higher accuracy rate and lower time-consuming compared with the traditional methods.
  Yue Li , Xuejun Sha , Liang Ye and Xiaojie Fang
  Background: In present communication systems, the transmission signals are considered to be time-invariant and are processed by the time-invariant bandpass filter at the receiver. In this regard, all the signals in the pass band will pass through the filter, including the interferences. Materials and Methods: This study analyzes the time-frequency characteristic of the 4-QAM modulated pulse shaping signal and reveals that the energy concentration of the pulse shaping signal is time-varying, which makes some low-energy areas exist in the pass-band. Based on this characteristic, the masking threshold constrained time-varying filter is proposed and the optimal masking threshold is determined with MMSE criterion. Results: Simulation results show that based on the signal’s time-frequency distribution, the SINR and BER performances of the proposed filter outperform the conventional bandpass filter. Conclusion: According to the 4-QAM modulated pulse shaping signal’s energy concentration nature, the non-orthogonal or inter-cell interferences could be suppressed further by the masking threshold constrained time-varying filter.
  Juan Tan , Wentao Qiao , Jian Wang , Fengwen Xu , Yue Li , Jun Zhou , Qimin Chen and Yunqi Geng
  Interferon-induced proteins (IFPs) exert multiple functions corresponding to diverse interferon signals. However, the intracellular functions of many IFPs are not fully characterized. Here, we report that IFP35, a member of the IFP family with a molecular mass of 35 kDa, can interact with the bovine Tas (BTas) regulatory protein of bovine foamy virus (BFV). The interaction involves NID2 (IFP35/Nmi homology domain) of IFP35 and the central domain of BTas. The overexpression of IFP35 disturbs the ability of BTas to activate viral-gene transcription and inhibits viral replication. The depletion of endogenous IFP35 by interfering RNA can promote the activation of BFV, suggesting an inhibitory function of IFP35 in viral-gene expression. In addition, IFP35 can interact with the homologous regulatory protein of prototype FV and arrest viral replication and repress viral transcription. Our study suggests that IFP35 may represent a novel pathway of interferon-mediated antiviral activity in host organisms that plays a role in the maintenance of FV latency.
  Antoine Younes , Alexey E. Lyashkov , David Graham , Anna Sheydina , Maria V. Volkova , Megan Mitsak , Tatiana M. Vinogradova , Yevgeniya O. Lukyanenko , Yue Li , Abdul M. Ruknudin , Kenneth R. Boheler , Jennifer van Eyk and Edward G. Lakatta
  Spontaneous, rhythmic subsarcolemmal local Ca2+ releases driven by cAMP-mediated, protein kinase A (PKA)-dependent phosphorylation are crucial for normal pacemaker function of sinoatrial nodal cells (SANC). Because local Ca2+ releases occur beneath the cell surface membrane, near to where adenylyl cyclases (ACs) reside, we hypothesized that the dual Ca2+ and cAMP/PKA regulatory components of automaticity are coupled via Ca2+ activation of AC activity within membrane microdomains. Here we show by quantitative reverse transcriptase PCR that SANC express Ca2+-activated AC isoforms 1 and 8, in addition to AC type 2, 5, and 6 transcripts. Immunolabeling of cell fractions, isolated by sucrose gradient ultracentrifugation, confirmed that ACs localize to membrane lipid microdomains. AC activity within these lipid microdomains is activated by Ca2+ over the entire physiological Ca2+ range. In intact SANC, the high basal AC activity produces a high level of cAMP that is further elevated by phosphodiesterase inhibition. cAMP and cAMP-mediated PKA-dependent activation of ion channels and Ca2+ cycling proteins drive sarcoplasmic reticulum Ca2+ releases, which, in turn, activate ACs. This feed forward "fail safe" system, kept in check by a high basal phosphodiesterase activity, is central to the generation of normal rhythmic, spontaneous action potentials by pacemaker cells.
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