an experimental study,the application of covariance without interaction and with interaction in experiment with pre-measurement and post-measurement was discussed.And comparing with the "analysis of covariance for difference value" designed by the authors,the two analysis methods had the similar results....
As seen in Section 2, random projection methods show good promise in mean vector testing. Using random projections for covariance matrices is an interesting question that is an active area of research. If R∈Rk×p is an orthogonal random matrix, then projecting the data using R preserves the ...
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook covariance Thesaurus Medical Financial Encyclopedia Wikipedia Related to covariance:Covariance matrix co·var·i·ance (kō-vâr′ē-əns) n. A statistical measure of the tendency of two random variables to var...
2021Covariance matrix carries a big weight in the domain of portfolio. Most researchers spend more time on model construction, risk measurement and algorithm analysis, but paid little attention to the deeper theory research and rigorous proof on the positive definiteness of the covariance matrix. ...
Research findings indicate that individuals with HCU exhibit impaired working memory networks. Consequently, they require increased effort to perform working-memory tasks effectively [8]. Long-term cannabis use has been shown to significantly impact the adjustment and coordination of networks involved in ...
In the current research, we aimed to (1) focus earlier on the GM covariance characteristics of NC individuals who progressed to MCI (N-t-M progression), (2) explore the GM covariance characteristics of MCI patients who reverted to the NC state (M-t-N reversion), and (3) validate the ...
Sleep health is both conceptually and operationally a composite concept containing multiple domains of sleep. In line with this, high dependence and interaction across different domains of sleep health encourage a transition in sleep health research from
This contribution is focused on how to write a research paper when structural equation models are being used in empirical work. The main question to be answered is what information should be reported and what results can be deleted without much loss of judgment about the quality of research and...
This paper briefly reviewed the development process and basic principles,outlined advantages and disadvantages of eddy covarianc technology,while summaried the research results of eddy covarianc technology applied in carbon budget of terrestrial ecosystem in terms of adiabatic relationship of carbon budget...
In Mathematics in Science and Engineering, 2007 5.3.4 Some other relevant results on estimates of covariance matrix The covariance matrix estimation is an area of intensive research. Below, we mention some results which are relevant to the methods discussed above. Calvin and Dykstra [13] considered...