Results 181 to 190 of about 403 (256)
On generalized standard algebras. [PDF]
Proc Natl Acad Sci U S A, 1968 Schafer RD.
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An extension of the basic local independence model to multiple observed classifications
British Journal of Mathematical and Statistical Psychology, EarlyView.Abstract The basic local independence model (BLIM) is appropriate in situations where populations do not differ in the probabilities of the knowledge states and the probabilities of careless errors and lucky guesses of the items. In some situations, this is not the case. This work introduces the multiple observed classification local independence model
Pasquale Anselmi +8 more
wiley +1 more source
The restricted simple Lie algebras are of classical or Cartan type. [PDF]
Proc Natl Acad Sci U S A, 1984 Block RE, Wilson RL.
europepmc +1 more source
British Journal of Mathematical and Statistical Psychology, EarlyView.Abstract Hidden Markov diagnostic classification models capture how students' cognitive attributes evolve over time. This paper introduces a Bayesian Markov chain Monte Carlo algorithm for diagnostic classification models that jointly estimates time‐varying Q matrices, latent attributes, item parameters, attribute class proportions and transition ...
Chen‐Wei Liu
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Structure theory for a class of jordan algebras. [PDF]
Proc Natl Acad Sci U S A, 1966 Jacobson N.
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Bias and precision in true‐score estimation
British Journal of Mathematical and Statistical Psychology, EarlyView.Abstract We discuss two approaches to estimating the true score from classical test theory, each with a corresponding measure of uncertainty due to measurement error: the classical method with the standard error of measurement (SEM) and Kelley's method with the standard error of estimation (SEE).
L. Andries van der Ark +3 more
wiley +1 more source
Noncommutative jordan algebras with commutators satisfying an alternativity condition. [PDF]
Proc Natl Acad Sci U S A, 1970 Block RE.
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Is free trade good for renewable resources? Brander and Taylor redux
Canadian Journal of Economics/Revue canadienne d'économique, EarlyView.Abstract This paper generalizes the original Brander and Taylor model of open‐access renewable resource use and trade to address three common critiques. First, I introduce heterogeneity across agents in harvesting productivity to smooth out the model's extreme specialization patterns while maintaining its Ricardian structure and tractability. Second, I
M. Scott Taylor
wiley +1 more source
A new class of counterexamples to the integrability problem. [PDF]
Proc Natl Acad Sci U S A, 1977 Conn JF.
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Progressively Projected Newton's Method
Computer Graphics Forum, EarlyView.Abstract Newton's Method is widely used to find the solution of complex non‐linear simulation problems. To guarantee a descent direction, it is common practice to clamp the negative eigenvalues of each element Hessian prior to assembly—a strategy known as Projected Newton (PN)—but this perturbation often hinders convergence.
J. A. Fernández‐Fernández +2 more
wiley +1 more source