We evaluate the descriptive validity of cost behavior model for profit analysis using Compustat data. For this purpose, we propose an earnings forecast decomposing into components that reflect (1) variability costs with sales revenue and (2) stickiness in declines. predictive ability our by benchmarking its performance forecasting one-year-ahead returns on equity against two other time-series models based line item information reported income statement cash flows. Specifically, consider a...

We propose and numerically investigate a novel ultra-broadband solar absorber by applying iron in 2D simple metamaterial structure. The proposed structure can achieve the perfect absorption above 95% covering wavelength range from 400 to 1500 nm. average reaches 97.8% over this range. broadband is caused excitation of localized surface plasmon resonance propagating resonance. first demonstrate that obviously beneficial impedance matching between free space an ultra-broad frequency band...

A near-infrared plasmonic refractive index (RI) sensor with figure of merit (FOM) as high 124.6 is proposed and investigated numerically. The RI sensing realized by employing the linear relation between resonant wavelength material under detecting. Based on fillet cavity coupled two metal-insulator-metal waveguides, transmission efficiency (T) optical resolution (FWHM) are both improved to a great extent T = 95% FWHM 12nm, keeping acceptable sensitivity 1496nm/RIU within region. In addition,...

We propose and numerically investigate a perfect ultra-narrowband absorber with an absorption bandwidth of only 1.82 nm efficiency exceeding 95% in the visible region. demonstrate that is ascribed to coupling effect induced by localized surface plasmon resonance. The influence structural dimensions on optical performance also investigated, optimal structure obtained extremely low reflectivity (0.001) resonance dip. can be operated as refractive index sensor sensitivity around 425 nm/RIU...

Due to the problems of high bit error rate and delay, low bandwidth limited energy sensor nodes in underwater acoustic network (UASN), it is particularly important design a routing protocol with reliability, strong robustness, end-to-end delay efficiency which can flexibly be employed dynamic environment. Therefore, reinforcement learning-based opportunistic (RLOR) proposed this paper by combining advantages learning algorithm. The RLOR kind distributed approach, comprehensively considers...

We propose and numerically investigate a novel perfect ultra-narrow band absorber based on metal-dielectric-metal-dielectric-metal periodic structure working at near-infrared region, which consists of dielectric layer sandwiched by metallic nanobar array thin gold film over supported film. The absorption efficiency the are about 98 % 0.5 nm, respectively. high is contributed to localized surface plasmon resonance, can be influenced parameters refractive index layer. Importantly, shows an...

A novel broadband high gain vertical planar printed antenna is presented. The proposed composed of a bowtie-shaped electric dipole, loop that works as magnetic microstrip-to-coplanar stripline transition balun, and the H-shaped resonator (HSR) structures are used for enhancement, all which in same plane perpendicular to ground. Prototypes HSR-loaded unloaded one were fabricated measured. Analyses comparisons made. has wide impedance bandwidth 51.9%, ranging from 2.31 GHz 3.93 stable about...

This paper examines global and regional stock market integration in Asia at both the aggregate disaggregate (industry) levels by applying Phillips-Sul (2007) tests for panel club convergence. Over whole sample (1998m12–2018m3) two sub-sample periods (i.e., pre- post-2008 financial crisis periods), Asian markets appear to be integrated globally (vis-à-vis US) regionally Asia) level, although speed of convergence has decreased after crisis. The industry level reveals that, notwithstanding...

Increasing the absorption efficiency of solar radiation has great significance for renewable energy applications, such as residential water heating, seawater desalination, wastewater treatment and thermophotovoltaic devices. Optical absorbers based on metamaterials have been widely investigated using a variety structural designs. However, near‐ideal thermal absorber not yet demonstrated, which near unity from ultraviolet to near‐infrared region meanwhile an close zero in mid‐infrared region....

Far field X-ray grating interferometry achieves extraordinary phase sensitivity in imaging weakly absorbing samples, provided that the period is within transverse coherence length of source. Here we describe a cost-efficient process to fabricate large area, 100 nm half-pitch hard gratings with an aspect ratio 32. The nanometric are suitable for ordinary compact sources having low spatial coherence, as demonstrated by diffraction experiments.

In this paper, we experimentally demonstrate a method to generate frequency-doubling photonic 16-quadrature-amplitude-modulation (16QAM) vector millimeter-wave (mm-wave) signal by using single phase modulator (PM) with an amplitude and precoding technique. The PM is driven 2-Gbaud 16QAM-modulated precoded at 20 GHz. We transmit the generated optical radio-frequency (RF) 40 GHz over 22-km single-mode fiber, after heterodyne beating in single-ended photodiode, 40-GHz electrical mm-wave...

Whispering gallery mode (WGM) microtoroid optical resonators have been effectively used to sense low concentrations of biomolecules down the single molecule limit.Optical WGM biochemical sensors such as operate by tracking changes in resonant frequency particles enter evanescent nearfield resonator.Previously, gold nanoparticles coupled increase magnitude resonance shifts via plasmonic enhancement electric field.However, this approach results increased scattering from WGM, which degrades its...

Metasurfaces have pioneered a new avenue for advanced wave-front engineering. Among the various types of metasurfaces, Huygens’ metasurfaces are thought to be novel paradigm flat optical devices. Enabled by spectrally overlapped electric resonance and magnetic resonance, imparted with high transmission full phase coverage 2π, which makes them capable realizing high-efficiency control. However, defect is that their profiles transmissive responses often sensitive interaction neighboring...

Recent investigations of microcavity frequency combs based on cascaded four-wave mixing have revealed a link between the evolution optical spectrum and observed temporal coherence. Here we study silicon nitride microresonator for which initial sidebands are spaced by multiple free spectral ranges (FSRs) from pump, then fill in to yield comb with single FSR spacing, resulting partial By using pulse shaper select manipulate phase various subsets lines, able probe structure coherence within...