Abstract: A parallel allocation calculating unit calculates a parallel allocation candidate which is an element candidate in target data allocated per processing performed in parallel. A parallel calculation amount estimation processing unit estimates the calculation amount required for parallel processing when a parallel allocation candidate is allocated, based on a nonzero element count in the target data. An optimality decision processing unit decides whether or not the parallel allocation candidate is optimal based on the calculated calculation amount, and allocates the optimal element per processing performed in parallel.

Abstract: An approximate computation unit computes an approximate of a determinant of a Hessian matrix relating to observed data represented as a matrix. A variational probability computation unit computes a variational probability of a latent variable using the approximate of the determinant. A latent state removal unit removes a latent state based on a variational distribution. A parameter optimization unit optimizes a parameter for a criterion value that is defined as a lower bound of an approximate obtained by Laplace-approximating a marginal log-likelihood function with respect to an estimator for a complete variable, and computes the criterion value. A convergence determination unit determines whether or not the criterion value has converged.

Abstract: A parallel allocation calculating unit calculates a parallel allocation candidate which is an element candidate in target data allocated per processing performed in parallel. A parallel calculation amount estimation processing unit estimates the calculation amount required for parallel processing when a parallel allocation candidate is allocated, based on a nonzero element count in the target data. An optimality decision processing unit decides whether or not the parallel allocation candidate is optimal based on the calculated calculation amount, and allocates the optimal element per processing performed in parallel.

Abstract: A piercing needle with which a flashback can be reliably confirmed and air can be prevented from remaining in its hub portion. The piercing needle comprises an outer needle having a hub, an inner needle to be inserted into the outer needle, a hub portion of which is adapted to be fitted in the outer needle hub, and a valve disc to close the internal cavity of the outer needle. Side holes are formed in the distal end of the outer needle. The outer needle hub is made in two parts, and is provided with a hydrophobic vent filter near the valve disc to allow the internal cavity of the outer needle hub to communicate with the outer atmosphere.

Abstract: A piercing needle with which a flashback can be reliably confirmed and air can be prevented from remaining in its hub portion. The piercing needle comprises an outer needle having a hub, an inner needle to be inserted into the outer needle, a hub portion of which is adapted to be fitted in the outer needle hub, and a valve disc to close the internal cavity of the outer needle. Side holes are formed in the distal end of the outer needle. The outer needle hub is provided with a hydrophobic vent filter near the valve disc to allow the internal cavity of the outer needle hub to communicate with the outer atmosphere.