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  2. Controllability - Wikipedia

    en.wikipedia.org/wiki/Controllability

    A controllable system is not necessarily output controllable. For example, if matrix D = 0 and matrix C does not have full row rank, then some positions of the output are masked by the limiting structure of the output matrix, and therefore unachievable. Moreover, even though the system can be moved to any state in finite time, there may be some ...

  3. Controllability Gramian - Wikipedia

    en.wikipedia.org/wiki/Controllability_Gramian

    The controllability matrix = [] has rank n. The (+) matrix [] has ... has full row rank at every eigenvalue of . If, in addition, all eigenvalues of have negative ...

  4. Subspace identification method - Wikipedia

    en.wikipedia.org/wiki/Subspace_identification_method

    The rank determines the order of the polynomials of the rational function. In the 1960s the work of Kronecker inspired a number of researchers in the area of Systems and Control, like Ho and Kalman, Silverman and Youla and Tissi, to store the Markov parameters of an LTI system into a finite dimensional Hankel matrix and derive from this matrix ...

  5. Rank (linear algebra) - Wikipedia

    en.wikipedia.org/wiki/Rank_(linear_algebra)

    A matrix that has rank min(m, n) is said to have full rank; otherwise, the matrix is rank deficient. Only a zero matrix has rank zero. f is injective (or "one-to-one") if and only if A has rank n (in this case, we say that A has full column rank). f is surjective (or "onto") if and only if A has rank m (in this case, we say that A has full row ...

  6. Gram matrix - Wikipedia

    en.wikipedia.org/wiki/Gram_matrix

    Likewise, the Gram matrix of the rows or columns of a unitary matrix is the identity matrix. The rank of the Gram matrix of vectors in R k {\displaystyle \mathbb {R} ^{k}} or C k {\displaystyle \mathbb {C} ^{k}} equals the dimension of the space spanned by these vectors.

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  8. Observability - Wikipedia

    en.wikipedia.org/wiki/Observability

    If and only if the column rank of the observability matrix, defined as = [] is equal to , then the system is observable.The rationale for this test is that if columns are linearly independent, then each of the state variables is viewable through linear combinations of the output variables .

  9. Mark Wahlberg Shows Off His Ripped Body on the Beach in the ...

    www.aol.com/lifestyle/mark-wahlberg-shows-off...

    Mark Wahlberg is taking the term “beach body” to the next level.. In photos shared exclusively with PEOPLE, the actor, 53, was spotted showing off an ultra-muscular physique while vacationing ...