Showing 2,161 - 2,180 results of 19,511 for search '"Algorithms"', query time: 0.08s Refine Results
  1. 2161

    CC-MRSJ:Cache Conscious Star Join Algorithm on Hadoop Platform by Guoliang Zhou, Yongli Zhu, Guilan Wang

    Published 2013-10-01
    “…A cache-conscious MapReduce star join algorithm was presented,each column of fact table was separately stored,and dimension table was divided into several column families according to dimension hierarchy.Fact table foreign key column and corresponding dimension table was co-location storage,thus reducing data movement in the join process.CC-MRSJ consists of two phases:firstly each foreign key column and the corresponding dimension table were joined; then the intermediate results were joined and random accessed measure columns,and so got the final result.CC-MRSJ read only the data needed,and cache utilization is high,so it has good cache conscious feature; it also takes advantage of late materialization,avoiding unnecessary data access and movement.CC-MRSJ has higher performance comparing to hive system based on SSB datasets.…”
    Get full text
    Article
  2. 2162
  3. 2163

    Sparse adaptive constant blind equalization algorithm for sparse multipath channel by Si-yang MA, Hua PENG, Bin WANG

    Published 2017-01-01
    “…In order to improve the convergence rate of the blind equalizer for sparse multipath channel,a novel blind equalization approach called l<sub>0</sub>-norm constraint proportionate normalized least mean square constant algorithm was proposed for M-order phase-shift keying (MPSK) signal.Based on the constant modulus characteristics of MPSK signal and the sparse property of equalizer,a new blind equalization cost function with the l<sub>0</sub>-norm penalty on the equalizer tap coefficients was firstly constructed.Then the update formula of the tap coefficients was derived according to the gradient descent algorithm.Moreover,the iteration step was updated by drawing upon the normalized proportionate factor.The algorithm not only assigned step sizes proportionate to the magnitude of the current individual tap weights,but also attracted the inactive taps to zero adaptively.Theoretical analysis and simulation results show that the proposed algorithm outperforms the existing blind equalization algorithms for sparse channel in reducing ISI and improving convergence rate.…”
    Get full text
    Article
  4. 2164

    Algorithm based on randomly assigning filters to reduce PAPR in GFDM system by Miao ZHANG, Xianzhong XIE, Lei WU, Weijia LEI

    Published 2016-09-01
    “…As an alternative of the fifth generation mobile communication system waveforms,generalized frequency division multiplexing(GFDM)which has more advantages over OFDM has been trusted into the limelight.Nevertheless,GFDM still suffers from a high peak to average power ratio(PAPR).Considering that different filters have their own phase-frequency characteristics,a new algorithm based on randomly assigning filters to reduce PAPR in GFDM(RAF-GFDM)was proposed.According to the feature of GFDM system that the filter structure could be selected flexibly,different filters were assigned to subcarriers randomly to adjust the phase congruency due to signals superimposition.Additionally,this method can suppress PAPR effectively without causing signal distortion.Theoretical analysis and simulation results demonstrate that the proposed algorithm does not bring additional calculation costs while reducing PAPR and almost has no effect on the bit error rate(BER),and it may provide a higher application value.…”
    Get full text
    Article
  5. 2165

    An Improved Extended Information Filter SLAM Algorithm Based on Omnidirectional Vision by Jingchuan Wang, Weidong Chen

    Published 2014-01-01
    “…An improved extended information filter SLAM algorithm based on omnidirectional vision is presented in this paper. …”
    Get full text
    Article
  6. 2166

    Common protocol for validation of the QCOVID algorithm across the four UK nations by Ronan A Lyons, Aziz Sheikh, Vahe Nafilyan, Frank Kee, Carol Coupland, Julia Hippisley-Cox, Chris Robertson, Ben Humberstone, Jane Lyons, Christopher R Cardwell, Steven Kerr

    Published 2022-06-01
    “…Introduction The QCOVID algorithm is a risk prediction tool for infection and subsequent hospitalisation/death due to SARS-CoV-2. …”
    Get full text
    Article
  7. 2167
  8. 2168

    Plant Disease Identification Based on Deep Learning Algorithm in Smart Farming by Yan Guo, Jin Zhang, Chengxin Yin, Xiaonan Hu, Yu Zou, Zhipeng Xue, Wei Wang

    Published 2020-01-01
    “…Then, images segmented based on the results of RPN algorithm contain the feature of symptoms through Chan–Vese (CV) algorithm. …”
    Get full text
    Article
  9. 2169
  10. 2170

    Robust Nonlinear Partial Least Squares Regression Using the BACON Algorithm by Abdelmounaim Kerkri, Jelloul Allal, Zoubir Zarrouk

    Published 2018-01-01
    “…The difference between QPLS2 and the regular PLS algorithm is the use of quadratic regression instead of OLS regression in the calculations of latent variables. …”
    Get full text
    Article
  11. 2171
  12. 2172

    Algorithm and mathematical model for geometric positioning of segments on aspherical composite mirror by B. Conquet, L. F. Zambrano, N. K. Artyukhina, R. V. Fiodоrtsev, A. R. Silie

    Published 2018-09-01
    “…The variant of construction of arrays through concentric rings of an equal step is offered.A sequential three-step method for distributing mosaic segments is presented when performing calculations for aligning the aspherical surface: multipath linear; multipath point; block trapezoidal.In the course of mathematical modeling an algorithm was developed to solve the problem of geometric positioning of flat hexagonal segments of a mirror telescope. …”
    Get full text
    Article
  13. 2173

    Beetle Swarm Optimization Algorithm-Based Load Control with Electricity Storage by Hengjing He, Shangli Zhou, Leping Zhang, Junhong Lin, Weile Chen, Di Wu

    Published 2020-01-01
    “…Simulation results verify the effectiveness of the algorithm.…”
    Get full text
    Article
  14. 2174

    Multimedia Image Encryption Analysis Based on High-Dimensional Chaos Algorithm by Xing Zhang

    Published 2021-01-01
    “…Compared with the traditional encryption system, encryption algorithms based on chaos are easier to implement, which makes them more suitable for large-scale data encryption. …”
    Get full text
    Article
  15. 2175

    Design and implementation algorithm of safe driver assistant system based on EOG by Zhao LYU, Xiao-pei WU, Chao ZHANG, Bing WEI

    Published 2016-07-01
    “…Experiential results re-veal that the SDAS based on the multi-class saccade signals recognition algorithm presents an excellent classification per-formance.…”
    Get full text
    Article
  16. 2176

    Routing discovery algorithm based on reliable path stability estimation in MANET by Zhi-nan LI, Xiao-dong YANG

    Published 2016-08-01
    “…A novel routing discovery algorithm for MANETs was proposed based on reliable residual path lifetime (RPL) prediction (RLE-RPLP).Correlation between residual link lifetime (RLL) of neighboring links was explicitly investigated and fully taken into account in stability estimation of multi-hop paths in the algorithm.Optimized RPL statistical proper-ties were further explored to offer a more reliable path stability metric.Simulation analysis demonstrates that the pro-posed RLE-RPLP routing discovery algorithm shows prominent superiority in improving network throughput and reduc-ing route reconstruction frequency.Moreover,compared with the existing link stability-aware routing protocol,the RLE-RPLP achieves better performance improvement in terms of throughput and routing overhead.…”
    Get full text
    Article
  17. 2177

    Strong Convergence of a Monotone Projection Algorithm in a Banach Space by Songtao Lv

    Published 2013-01-01
    “…Strong convergence of the monotone projection algorithm for monotone operators and bifunctions is obtained in a reflexive Banach space.…”
    Get full text
    Article
  18. 2178

    A Study on Iterative Algorithm for Stochastic Distribution Free Inventory Models by Jennifer Lin

    Published 2013-01-01
    “…We studied the iterative algorithm in Tung et al. (2010) to find out that their assertion is questionable. …”
    Get full text
    Article
  19. 2179

    Vehicle classification algorithm based on binary proximity sensors and neural networks by ZHANG Wei, TAN Guo-zhen, DING Nan, SHANG Yao

    Published 2008-01-01
    “…To improve the classification accuracy, a new algorithm was developed with binary proximity magnetic sen- sors and back propagation neural networks. …”
    Get full text
    Article
  20. 2180

    An Improved Integrated Scheduling Algorithm with Process Sequence Time-Selective Strategy by Zhen Wang, Xiaohuan Zhang, Gang Peng

    Published 2021-01-01
    “…The integrated scheduling algorithm of process sequence time-selective strategy (ISAOPSTSS) is an advanced algorithm in the field of integrated scheduling. …”
    Get full text
    Article