3,060 research outputs found
Competing orders and inter-layer tunnelling in cuprate superconductors: A finite temperature Landau theory
We propose a finite temperature Landau theory that describes competing orders
and interlayer tunneling in cuprate superconductors as an important extension
to a corresponding theory at zero temperature [Nature {\bf 428}, 53 (2004)],
where the superconducting transition temperature is defined in three
possible ways as a function of the zero temperature order parameter. For given
parameters, our theory determines without any ambiguity. In mono- and
double-layer systems we discuss the relation between zero temperature order
parameter and the associated transition temperature in the presence of
competing orders, and draw a connection to the puzzling experimental fact that
the pseudo-gap temperature is much higher than the corresponding energy scale
near optimum doping. Applying the theory to multi-layer systems, we calculate
the layer-number dependence of . In a reasonable parameter space the
result turns out to be in agreement with experiments.Comment: 5 pages, 3 figure
Tunable Frequency Comb Generation from a Microring with a Thermal Heater
We demonstrate a novel comb tuning method for microresonator-based Kerr comb
generators. Continuously tunable, low-noise, and coherent comb generation is
achieved in a CMOS-compatible silicon nitride microring resonator.Comment: submitted to CLEO201
AquaÂ(2,9-dimethyl-1,10-phenanthroline-Îş2 N,N′)bisÂ(2-hydroxyÂbenzoato-ÎşO)manganese(II) 2,9-dimethyl-1,10-phenanthroline hemisolvate
In the asymmetric unit of the title complex, [Mn(C7H5O3)2(C14H12N2)(H2O)]·0.5C14H12N2, the MnII ion is coordinated by a bidentate 2,9-dimethyl-1,10-phenanthroline (dmphen) molÂecule, one water molÂecule and two monodentate 2-hydroxyÂbenzoate anions in a distorted trigonal-bipyramidal geometry. The OH group of the 2-hydroxyÂbenzoate anion is disordered over two positions with site-occupancy factors of 0.5. The asymmetric unit is completed with by an uncoordinated half-molÂecule of dmphen, disordered about a crystallographic twofold axis. In the crystal structure, molÂecules are linked into a two-dimensional framework by O—Hâ‹ŻN, O—Hâ‹ŻO and C—Hâ‹ŻO hydrogen bonds. The packing of the structure is further stabilized by π–π stacking interÂactions involving dmphen molÂecules, with centroid–centroid separations of 3.8027 (3) and 3.6319 (3) Å
Exact and Consistent Interpretation for Piecewise Linear Neural Networks: A Closed Form Solution
Strong intelligent machines powered by deep neural networks are increasingly
deployed as black boxes to make decisions in risk-sensitive domains, such as
finance and medical. To reduce potential risk and build trust with users, it is
critical to interpret how such machines make their decisions. Existing works
interpret a pre-trained neural network by analyzing hidden neurons, mimicking
pre-trained models or approximating local predictions. However, these methods
do not provide a guarantee on the exactness and consistency of their
interpretation. In this paper, we propose an elegant closed form solution named
to compute exact and consistent interpretations for the family of
Piecewise Linear Neural Networks (PLNN). The major idea is to first transform a
PLNN into a mathematically equivalent set of linear classifiers, then interpret
each linear classifier by the features that dominate its prediction. We further
apply to demonstrate the effectiveness of non-negative and sparse
constraints on improving the interpretability of PLNNs. The extensive
experiments on both synthetic and real world data sets clearly demonstrate the
exactness and consistency of our interpretation.Comment: KDD 201
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