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  2. Trip distribution - Wikipedia

    en.wikipedia.org/wiki/Trip_distribution

    Actually, from home interview travel survey data and attraction analysis we have the cell information for t = 1. The data are a sample, so we generalize the sample to the universe. The techniques used for zonal interchange analysis explore the empirical rule that fits the t = 1 data.

  3. Iterative proportional fitting - Wikipedia

    en.wikipedia.org/wiki/Iterative_proportional_fitting

    The iterative proportional fitting procedure (IPF or IPFP, also known as biproportional fitting or biproportion in statistics or economics (input-output analysis, etc.), RAS algorithm [1] in economics, raking in survey statistics, and matrix scaling in computer science) is the operation of finding the fitted matrix which is the closest to an initial matrix but with the row and column totals of ...

  4. Leopold matrix - Wikipedia

    en.wikipedia.org/wiki/Leopold_matrix

    An Example Showing the Location of Magnitude and Importance Values in a Leopold Matrix Cell The system consists of a grid of 100 rows representing the possible project activities on the horizontal axis and 88 columns representing environmental factors on the vertical axis, for a total of 8800 possible interactions. [ 1 ]

  5. Design structure matrix - Wikipedia

    en.wikipedia.org/wiki/Design_structure_matrix

    A sample DSM with 7 elements and 11 dependency marks. The design structure matrix (DSM; also referred to as dependency structure matrix, dependency structure method, dependency source matrix, problem solving matrix (PSM), incidence matrix, N 2 matrix, interaction matrix, dependency map or design precedence matrix) is a simple, compact and visual representation of a system or project in the ...

  6. Estimation of covariance matrices - Wikipedia

    en.wikipedia.org/wiki/Estimation_of_covariance...

    The sample covariance matrix (SCM) is an unbiased and efficient estimator of the covariance matrix if the space of covariance matrices is viewed as an extrinsic convex cone in R p×p; however, measured using the intrinsic geometry of positive-definite matrices, the SCM is a biased and inefficient estimator. [1]

  7. 1-Year-Old Boy in Medically Induced Coma After Mom's ...

    www.aol.com/1-old-boy-medically-induced...

    At the time of his initial arrest, Henderson told officials that Kybrel fell off the couch and onto the floor after he spun him in circles and placed him on the furniture, WPXI and WTAE reported.

  8. Johnny Depp's Lawyers Were 'Concerned' He 'Might Lose His ...

    www.aol.com/johnny-depps-lawyers-were-concerned...

    Johnny Depp's attorneys are looking back at his tricky testimony during his trial with Amber Heard.. Two of the actor's lawyers, Benjamin Chew and Jessica Meyers, shed light on the 2022 Virginia ...

  9. The Terrible—and Amazing—Side Effects of Weight Loss Drugs

    www.aol.com/terrible-amazing-side-effects-weight...

    Also, “make sure your new diet is rich in muscle-building protein,” says Paul Titchenell, PhD, at the University of Pennsylvania. ED. Yeah, ouch.