Showing 2,381 - 2,400 results of 2,448 for search '"covariance matrix"', query time: 0.18s Refine Results
  1. 2381

    Venlafaxine vs. fluoxetine in postmenopausal women with major depressive disorder: an 8-week, randomized, single-blind, active-controlled study by Jingjing Zhou, Xiao Wang, Lei Feng, Le Xiao, Rui Yang, Xuequan Zhu, Hui Shi, Yongdong Hu, Runsen Chen, Philip Boyce, Gang Wang

    Published 2021-05-01
    “…The primary endpoint measurements were analyzed using a mixed-effect model for repeated measures (MMRM) model with patients as a random-effect factor, treatment group as the independent variable, time as a repeated measure, and baseline covariates, using a first-order ante dependence covariance matrix. Results A total of 184 women were randomized. …”
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    Article
  2. 2382
  3. 2383
  4. 2384

    An Optimized Method for 3<i>D</i> Magnetic Navigation of Nanoparticles inside Human Arteries by Evangelos Karvelas, Christos Liosis, Andreas Theodorakakos, Ioannis Sarris, Theodoros Karakasidis

    Published 2021-03-01
    “…The present model use Computational Fluid Dynamics <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>(</mo><mi>C</mi><mi>F</mi><mi>D</mi><mo>)</mo></mrow></semantics></math></inline-formula> and Discrete Element Method <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>(</mo><mi>D</mi><mi>E</mi><mi>M</mi><mo>)</mo></mrow></semantics></math></inline-formula> techniques along with Covariance Matrix Adaptation <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>(</mo><mi>C</mi><mi>M</mi><mi>A</mi><mo>)</mo></mrow></semantics></math></inline-formula> evolution strategy for the evaluation of the optimal values of the gradient magnetic field. …”
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    Article
  5. 2385

    Motivated attention and family risk for depression: Neuronal generator patterns at scalp elicited by lateralized aversive pictures reveal blunted emotional responsivity by Jürgen Kayser, Craig E. Tenke, Karen S. Abraham, Daniel M. Alschuler, Jorge E. Alvarenga, Jamie Skipper, Virginia Warner, Gerard E. Bruder, Myrna M. Weissman

    Published 2017-01-01
    “…Component scores of prominent CSD-tPCA factors sensitive to emotional content were analyzed via permutation tests and repeated measures ANOVA for mixed factorial designs with unstructured covariance matrix, including gender, age and clinical covariates. …”
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    Article
  6. 2386
  7. 2387

    Robust support identification for direction-of-arrival estimation and EIT application by Borijindargoon, Narong

    Published 2020
    “…It was also compared with the conventional MUSIC algorithm coupled with a pre-conditioned covariance matrix.…”
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    Thesis-Doctor of Philosophy
  8. 2388

    Visual inertial odometry and lidar inertial odometry for mobile robot by Henawy, John Farid Nasry

    Published 2021
    “…Based on that, a novel IMU factor was formulated as a closed-form discrete factor to compute the mean measurements, covariance matrix and Jacobians. As such, the proposed model is more accurate and more efficient for online state estimation than the state-of-the-art. …”
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    Thesis-Doctor of Philosophy
  9. 2389

    Transceiver optimization for multi-user systems : rate improvement and degrees of freedom characterization by Zeng, Yong

    Published 2014
    “…The additional degree of freedom in the pseudo-covariance matrix, which is conventionally set to be zero for the case of proper Gaussian signaling, provides an opportunity to further improve the achievable rates of Gaussian MIMO-ICs by employing improper Gaussian signaling. …”
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    Thesis
  10. 2390

    Grouping features in big dimensionality by Zhai, Yiteng

    Published 2016
    “…Based on the observation of the growing trend of big dimensionality on modern databases, existing approaches that require the calculations of pairwise feature correlations in their algorithmic designs have scored miserably, since computing the full correlation/covariance matrix (i.e., square of dimensionality in size, where million features would translate to trillion correlation computations) can become computationally very impractical. …”
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    Thesis
  11. 2391

    Extensão bivariada do índice de confiabilidade univariado para avaliação da estabilidade fenotípica Bivariate extension of univariate reliability index for evaluating phenotypic st... by Suzankelly Cunha Arruda de Abreu, Daniel Furtado Ferreira, Fábio de Lima Gurgel, Ângela de Fátima Barbosa Abreu

    Published 2004-10-01
    “…Considering the standardized values, the genotypes mean vector and covariance matrix were estimated. The theoretical derivation of the bivariate reliability index (Ii) of Annicchiarico was wasked out and a second risk index was proposed based on the bivariate probabilities (Prb i); the two indexes proposed has shown good agreement to the results in an example with melon genotypes.…”
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    Article
  12. 2392

    Technical note: Evaluation of profile retrievals of aerosols and trace gases for MAX-DOAS measurements under different aerosol scenarios based on radiative transfer simulations by X. Tian, X. Tian, Y. Wang, Y. Wang, S. Beirle, P. Xie, P. Xie, P. Xie, P. Xie, T. Wagner, J. Xu, A. Li, S. Dörner, B. Ren, B. Ren, X. Li

    Published 2021-08-01
    “…For the optimal estimation algorithm, the agreement with the input values can be improved by optimizing the covariance matrix of the a priori uncertainties. Second, the aerosol effects on the NO<span class="inline-formula"><sub>2</sub></span> profile retrieval were tested. …”
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    Article
  13. 2393

    Quijote-PNG: The Information Content of the Halo Mass Function by Gabriel Jung, Andrea Ravenni, Marco Baldi, William R Coulton, Drew Jamieson, Dionysios Karagiannis, Michele Liguori, Helen Shao, Licia Verde, Francisco Villaescusa-Navarro, Benjamin D. Wandelt

    Published 2023-01-01
    “…The choice of adding the HMF to our previous joint analysis of the power spectrum and bispectrum is driven by a preliminary field-level analysis, in which we train graph neural networks on halo catalogs to infer the PNG f _NL parameter. The covariance matrix and the responses of our summaries to changes in model parameters are extracted from a suite of halo catalogs constructed from the Quijote-png N -body simulations. …”
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    Article
  14. 2394

    The Effectiveness of Transcranial Direct Current Stimulation (tDCS) on Improving Cognitive Abilities in Martial Athletes by Ali Rezaei sharif, Sara Taghizadeh hir, Ghasem

    Published 2023-01-01
    “…Also, according to the Box's M test, the equality of the covariance matrix of the dependent variables between the experimental and control groups was not significant (p>0.05). …”
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    Article
  15. 2395
  16. 2396

    Input features for deep learning-based polyphonic sound event localization and detection by Nguyen, Thi Ngoc Tho

    Published 2023
    “…SALSA feature consists of multichannel log-magnitude linear-frequency spectrograms stacked along with normalized principal eigenvector of the spatial covariance matrix at each time-frequency bin. The feature has exact time-frequency mapping between the signal power and the source directional cues, which is crucial for resolving overlapping sound sources. …”
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    Thesis-Doctor of Philosophy
  17. 2397

    Deep learning based speech enhancement for noise adverse environment by Tan, Zhi Wei

    Published 2024
    “…The proposed recurrent neural beamformer (R-NBF) achieves multichannel speech enhancement with speech sample spatial covariance matrix (SCM) through a feedback connection. …”
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    Thesis-Doctor of Philosophy
  18. 2398

    Detection And Identification Of Stiction In Control Valves Based On Fuzzy Clustering Method by Daneshwar, Muhammad Amin

    Published 2016
    “…Then a matrix (which contains a sequence of serially uncorrelated random numbers with zero mean and finite variance) is added to covariance matrix. This modification prevents the fuzzy clustering algorithm from turning into numerical problem. …”
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    Thesis
  19. 2399
  20. 2400

    Comparison of principal component analysis (PCA) and discriminant analysis of principal component (DAPC) methods for analysis of population structure in Akhal-Take, Arabian and Cas... by Nasrin Babayi, Abbad Rafat, Mohammad Hossein Moradi, Mohammad Reza Feizi derakhshi

    Published 2021-10-01
    “…For this purpose, the variance-covariance matrix of independent variables was first calculated and principal components were extracted. …”
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    Article