6,976 research outputs found
A modified Brown algorithm for solving singular nonlinear systems with rank defects
AbstractA modified Brown algorithm for solving a class of singular nonlinear systems, F(x)=0, where x,F∈Rn, is presented. This method is constructed by combining the discreted Brown algorithm with the space transforming method. The second-order information of F(x) at a point is not required calculating, which is different from the tensor method and the Hoy's method. The Q-quadratic convergence of this algorithm and some numerical examples are given as well
Revision of Hycleus solonicus (Pallas, 1782) (Coleoptera: Meloidae, Mylabrini), with larval description and DNA barcoding
Hycleus solonicus (Pallas, 1782), referred to H. polymorphus species group, is revised. Adults are redescribed and illustrated, eggs and first-instar larvae are described and illustrated for the first time, COI sequence for DNAbarcoding is reported for the first time, the geographical distribution is revised and all available faunistic records from the literature and collections are summarized. In addition, two incorrect determinations are pointed out and Zonabris solonica var. dianae Sahlberg, 1913 is proposed to be a synonym of Hycleus scabiosae (Olivier, 1811)
Analyzing Hidden Representations in End-to-End Automatic Speech Recognition Systems
Neural models have become ubiquitous in automatic speech recognition systems.
While neural networks are typically used as acoustic models in more complex
systems, recent studies have explored end-to-end speech recognition systems
based on neural networks, which can be trained to directly predict text from
input acoustic features. Although such systems are conceptually elegant and
simpler than traditional systems, it is less obvious how to interpret the
trained models. In this work, we analyze the speech representations learned by
a deep end-to-end model that is based on convolutional and recurrent layers,
and trained with a connectionist temporal classification (CTC) loss. We use a
pre-trained model to generate frame-level features which are given to a
classifier that is trained on frame classification into phones. We evaluate
representations from different layers of the deep model and compare their
quality for predicting phone labels. Our experiments shed light on important
aspects of the end-to-end model such as layer depth, model complexity, and
other design choices.Comment: NIPS 201
Coupling of light from an optical fiber taper into silver nanowires
We report the coupling of photons from an optical fiber taper to surface
plasmon modes of silver nanowires. The launch of propagating plasmons can be
realized not only at ends of the nanowires, but also at the midsection. The
degree of the coupling can be controlled by adjusting the light polarization.
In addition, we present the coupling of light into multiple nanowires from a
single optical fiber taper simultaneously. Our demonstration offers a novel
method for optimizing plasmon coupling into nanoscale metallic waveguides and
promotes the realization of highly integrated plasmonic devices.Comment: 5 pages, 4 figure
Movable Fiber-Integrated Hybrid Plasmonic Waveguide on Metal Film
A waveguide structure consisting of a tapered nanofiber on a metal film is
proposed and analyzed to support highly localized hybrid plasmonic modes. The
hybrid plasmonic mode can be efficiently excited through the in-line tapered
fiber based on adiabatic conversion and collected by the same fiber, which is
very convenient in the experiment. Due to the ultrasmall mode area of plasmonic
mode, the local electromagnetic field is greatly enhanced in this movable
waveguide, which is potential for enhanced coherence light emitter
interactions, such as waveguide quantum electrodynamics, single emitter
spectrum and nonlinear optics
- …