Several techniques are considered for the analysis of electromagnetic scattering from rough ocean surfaces. A rigorous Multi-level Fast Multipole Method (MLFMM) is employed, as well a high-frequency ray-based solution. The MLFMM implemented in scalable form, allowing consideration very large surfaces (in excess 100/spl lambda//spl times/100/spl lambda/, where represents wavelength). Plane-wave incidence assumed, and key aspect study involves investigating rough-surface truncation. surface...

We investigate dynamical properties and the ground-state cooling of a mechanical oscillator in an optomechanical system coupling with atomic ensemble. In this hybrid system, ensemble which consists two-level atoms couples cavity field. Here we consider case where is higher excitation. Studies show that atom-field strength can obviously influence process, achieve by choosing appropriate physical parameters system. Our mechanism has potential applications quantum information processing...

We investigate the enhanced generation of optical second-order sideband (OSS) via magnon Kerr nonlinearity from a cavity magnonical hybrid system consisting single small yttrium iron garnet (YIG) crystal sphere and three-dimensional (3D) rectangular driven with weak probe strong control field. Beyond linear approximation, we solve nonlinear Heisenberg–Langevin equations for achieving analytical solutions by employing perturbation technique. Using experimentally achievable parameter settings,...

To realize the effective positioning in urban canyons, an enhanced map-aided Global Positioning System (GPS)/three-dimensional (3D) reduced inertial sensor system (RISS) tightly combined strategy is proposed. First, 3D RISS only based on built-in controller area network (CAN). CAN bus without additional sensors first constructed to lower cost. Then, a simple but map created assist positioning. Based map, Kalman filtering (KF) coupled method proposed fuse with GPS information and achieve...

We investigate the effects of geometrical and structural disorders on perfectly asymmetric diffraction (PAD) in Raman-Nath regime. The two types are realized by introducing random fluctuations position width one-dimensional (1D) driven atomic lattices. is modified differently with respect to disorders. It shown that PAD observed a certain strength range disorder, exceeding which it can be destroyed, while rather robust against disorder. different behaviors originate from disorder-induced...

The robustness and stability of lane detection is vital for advanced driver assistance vehicle technology even autonomous driving technology. To meet the challenges real-time in complex traffic scenes, a simple but robust multilane method proposed this paper. breaks down task into two stages, that is, line algorithm based on instance segmentation modeling adaptive perspective transform. Firstly, decomposed tasks, multitask network MobileNet designed. This includes parts: semantic branch Id...

We theoretically propose a scheme to measure the topological charge (TC) of mid-infrared vortex beam via observing intensity distribution four-wave mixing (FWM) field in an asymmetric semiconductor double quantum well. Due existence Fano-type interferences, special inherent interference takes place, and thus generates interference-type phase patterns for FWM field. Furthermore, it is demonstrated that visibility pattern can be drastically manipulated by adjusting detuning control...

The small number of pixels in the current linear mode avalanche photodiode (LM-APD) array limits its three-dimensional (3D) imaging resolution. We use an optical phased array-based beam subdivided pixel method to improve 3D resolution, using generate a with same as LM-APD and matching positions controlling each sub-beam scan field view corresponding pixel. divergence angle is smaller than instantaneous single array. scanning pixel’s realizes multiple acquisition target information by array,...

In the low-carbon era, photovoltaic power generation has emerged as a pivotal focal point. The inherent volatility of poses substantial challenge to stability grid, making accurate prediction imperative. Based on integration backpropagation (BP) neural network and genetic algorithm (GA), model was developed that contained two sub-models: no-rain no-snow scenarios, rain snow scenarios. Through correlation analysis, primary meteorological factors were identified which subsequently utilized...

Abstract This paper proposes a high efficiency and precise current balance circuit in parallel RGB Light Emitting Diodes (LED) channels for color filter‐less panel display. The new technique not only enhances the matching each channel but also reduces requirement of device numbers external resistors. error percentage all LED currents can kept within 0.1% when voltage has variation (Δ V CH ) around 1. 1V. Furthermore, proposed load dependent minimum drain effectively reduce drop across...

Abstract Objective To evaluate the setup errors in patients with upper and middle segment esophageal cancer who underwent cone beam computed tomography immobilized by thermoplastic film, to probe margins using clinical target volume (CTV) three directions. Methods A total of 60 were enrolled. All film at first, 10th, 20th treatment after positioning, respectively. These images registered planning determine translational rotational Then, CTV calculated from systematic random errors. Results...

Abstract We propose an efficient scheme to manipulate the perfect optical vortex (POV) beam in a cold atomic ensemble with five-level configuration. The orbital angular momentum can be completely transferred from POV control generated mixing field via inelastic four-wave (IFWM) process. It is found that intensity and helical phase of IFWM coherently controlled by adjusting relevant parameters, such as population, detuning pumping field. obtained results reasonably explained combination...

The electronic spectra of HNCSe were studied by performing multireference ab initio calculations at CASPT2 level theory taking into account spin-orbit (SO) coupling. Our highly accurate calculation indicated that theoretically determined geometric parameters and harmonic vibrational frequencies for the ground state X 1 A ′ are consistent with observed experimental data. We present oscillator strengths, structural changes accompanying excitation process. bonding characteristics in low-lying...

Two-Dimensional Dispersion Fringe Sensing (TDDFS) is an efficient method for coarse phasing of segmented mirrors. Modeling and simulations based on double-aperture diffraction are used to study dispersion fringe in two directions. In the direction, nonlinear least squares fitting extract piston error. The theoretical capture range ±96μm which verified compared with simulation results, detection accuracy can be reached λ/10. However, cannot effectively detect errors within one wavelength....