| We address pruning and evaluation of Tapped-Delay Neural Networks for the sunspot benchmark series. It is shown that the generalization ability of the networks can be improved by pruning using the Optimal Brain Damage method of Le Cun, Denker and Solla. A stop criterion for the pruning algorithm is formulated using a modiied version of Akaike's Final Prediction Error estimate. With the propos...

In the title compound, [CuBr(C(17)H(20)N(4))]BF(4), the Cu(II) ion is five-coordinated by the four N atoms of the tetra-dentate Schiff base ligand and by one bromide ion, thereby forming a square-pyramidal CuN(4)Br coordination geometry. The dihedral angle between the pyridine rings of the Schiff base is 54.39 (18)°. In the crystal, the components are linked by C-H⋯F inter-actions.

The title complex mol-ecule, [Cu(NO(3))(2)(C(4)H(6)N(2))(2)(H(2)O)], has crystallographically imposed twofold symmetry. The Cu(II) atom displays a distorted square-pyramidal CuN(2)O(3) coordination geometry. In the crystal, inter-molecular O-H⋯O hydrogen bonds between the coordinated water mol-ecule and the nitrate anions form chains parallel to the c axis.

We have determined the crystal structure of the single-phase stoichiometric high-temperature superconductor in the Y-Ba-Cu-O system using high-resolution neutron powder diffraction. This compound has an orthorhombic structure with space group Pmmm and lattice constants a = 3.8231 A, b = 3.8864 A, and c = 11.6807 A. The structure consists of "dimpled" Cn02 layers in the a-b planes loosely bonded...

Can-Li Song,1,2 Yi-Lin Wang,1 Ye-Ping Jiang,1,2 Zhi Li,1 Lili Wang,1 Ke He,1 Xi Chen,2 Xu-Cun Ma,1,* and Qi-Kun Xue1,2,† 1State Key Laboratory for Surface Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China 2State Key Laboratory for Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China (Received 19 May 2011; revised manu...

Eileen P. Clifford, Paul G. Wenthold, W. Carl Lineberger, G. Barney Ellison, Cun X. Wang, Joseph J. Grabowski, Fernando Vila and Kenneth D. Jordan a Department of Chemistry & Biochemistry, University of Colorado, Boulder, CO 80309–0215, USA b JILA, University of Colorado and National Institute of Standards and Technology, and Department of Chemistry & Biochemistry, University of Colorado, Bould...

In the title complex, [Cu(C(14)H(9)ClN(2)O(3))(C(5)H(5)N)], the Cu(II) ion exhibits a distorted trans-CuN(2)O(2) square-planar geometry arising from the O,O,N-tridentate ligand and a pyridine mol-ecule. An intra-molecular O-H⋯N hydrogen bond occurs. In the crystal structure, weak inter-molecular C-H⋯π inter-actions generate a chain. The crystal studied was an inversion twin.

Received 31 October 1995 and in final revised form 19 February 1996 Accepted 23 February 1996 Abstract Objective-To verify the phenotype to genotype correlations of mitochondrial DNA (mtDNA) related disorders in an atypical maternally inherited encephalomyopathy. Methods-Neuroradiological, morphological, biochemical, and molecular genetic analyses were performed on the affected members of a ped...

We report the clinical, pathological, and genetic findings of a case of MELAS syndrome. This was a man who died for metabolic failure at the age of 27 years. His familiar history was positive for hypoacusia and stroke. He was of short stature and presented mild mental retardation. Since the age of 21 he suffered from recurrent brain-ischemic lesions mainly in the occipital lobes, documented by ...