This paper proposes applying the nested U2-Net to a two-dimensional phase unwrapping (PU). PU has been classic well-posed problem since conventional methods are always limited by Itoh condition. Numerous studies conducted in recent years have discovered that data-driven deep learning techniques can overcome constraint and significantly enhance performance. However, most tested only on Gaussian white noise single environment, ignoring more widespread scattered real phases. The difference...

We report on a fiber laser system delivering 122 fs pulse duration and 600 mW average power at 1560 nm by the interplay between divided amplification nonlinear compression. A small-core double-clad erbium-doped with anomalous dispersion carries out simultaneously compresses pulses such that separate compressor is no longer necessary. numeric simulation reveals existence of an optimum length for producing transform-limited pulses. Furthermore, frequency doubling to 780 240 98 achieved using...

Aiming at the troubles (such as complex background, illumination changes, shadows and others on traditional methods) for detecting of a walking person, we put forward new adaptive detection algorithm through mixing Gaussian Mixture Model (GMM), edge continuous frame difference in this paper. In time domain, uses GMM to model updates background. spatial it hybrid which mixes algorithm, get initial contour moving target with big data, gets ultimate data. This not only can adapt gradients...

Speckle noise, mechano-physical and environmental noise are inevitably introduced in digital holographic coherent imaging, which seriously affects the quality of phase maps, removal non-Gaussian statistical represented by speckle has been a challenging problem. In past few years, deep learning methods based on convolutional neural networks (CNNs) have made good progress removing Gaussian noise. However, they tend to fail when these designed for used remove Recently, numerous studies employed...

Extracting robust feature representation is critical for object re-identification to accurately identify objects across non-overlapping cameras. Although having a strong ability, the Vision Transformer (ViT) tends overfit on most distinct regions of training data, limiting its generalizability and attention holistic features. Meanwhile, due structural difference between CNN ViT, fine-grained strategies that effectively address this issue in do not continue be successful ViT. To issue, by...

In this paper, a class of semilinear elliptic systems which have strong resonance at the first eigenvalue on Heisenberg group is considered. Under certain assumptions, by virtue variational methods, multiple weak solutions are obtained. MSC:35J20, 35J25, 65J67.

<title>Abstract</title> Current theoretical works on excavation-induced ground settlement in clays for small radius curve tunnels typically treat the shield as a continuous entity, neglecting influence of articulation device. Consequently, accurate assessment over-excavation effects resulting from changes curvature excavation route is impossible. As regards and geometric relationship between machine tunnel route, this paper develops formulae calculating soil amount angle at different...

In this paper, we study a class of quasilinear elliptic equations on Heisenberg group by using the nonsmooth critical point theory. Under some weaker assumptions, multiplicity and boundedness solutions for these are obtained.

A gated InGaAs/InP single-photon detector based on capacitance balancing technique was demonstrated, working efficiently at the detection-rate up to 200 MHz. The detection efficiency could achieve 10%, with an afterpulse probability of 3.3% and dark count rate 1.9×10−6 per pulse a

In this paper, we study the multiplicity of solutions for a class quasilinear elliptic equations with p-Laplacian in . case, functional J is not differentiable. Hence, it difficult to work under classical framework critical point theory. To overcome difficulty, use nonsmooth theory, which provides existence points nondifferentiable functionals. MSC:35J20, 35J92, 58E05.

The state transfer of nS Rydberg atoms induced by external pulsed electric field has been investigated. Cold are prepared the two-photon transition and selective field-ionization method is used to detect "P" due mixing. avoided crossing (n-4) manifold studied dependence rate on strength obtained. Experimental result interpreted using Stark effect it shows consistency between experiment calculation.

Commercial negotiations online, relative to traditional commercial which takes a lot of manpower, material and financial resources, are more in line with today's modern society advocate low-carbon life. In this paper, an architecture online negotiation process based on electronic contracts is designed form Chinese perspective. To make sure that the confidentiality, integrity non-repudiation e-contracts, system used technology signature achieve contract signed realizing third-part storage...

In embedded Internet of Things (IOT) environment, there are the troubles such as complex background, illumination changes, shadows and other factors for detecting moving object, so we put forward a new detection service method through mixing Gaussian Mixture Model (GMM), edge continuous frame difference in this paper.In time domain, uses GMM to model updates background.In spatial it hybrid which mixes method, get initial contour gets ultimate object.This not only can well adapt gradients...

A novel micro-grating array for Shack Hartmann wavefront sensors is presented. This circular shows obvious advantage in matching aperture. It also provides a potential way of decreasing the expense its easy design and manufacturing procedure. An implementation shown together with experimental measuring results. With this array, aperture can be matched by 100%, which avoid lost useful information when testing measuring, at same time, regular focal spots will adapt to common detectors are...

In order to get the trajectory of moving object using single-pixel imaging system, an algorithm is proposed. The same pseudorandom masks are employed illuminate different time scene. A weighted sum background correction signals information compressed sensing (CS) method. ideal situation, we can obtain other parameters (e.g., speed, orientation) besides trajectory. However, reflective intensity be change due angle caused by motion in some situations. This will mislead for achieving...

The filler is the core component of a cooling tower for heat dissipation. empirical formulas N, β xv , and ΔP are constitute performance filler. In certain conditions, obtained by experiments. Performance equations identical countercurrent fillers different at varying heights or seawater concentrations. conventional method linear interpolation to obtain under conditions. But its uncertainty limits application equation some extent. Therefore, RBF ANN adopted analyze based on existing in this...

针对在成像物体没有超出散射介质记忆效应范围的情况下，提出一种结合数字离轴全息术减少散射介质成像中散斑自相关噪声的方法。当成像目标经过散射介质时，使用自相关技术结合相位恢复算法能够从散斑中重建成像目标。但在实际成像的过程中，为了有效抑制环境噪声和热噪声等对重建效果的影响，设计利用离轴全息中的相移法消除噪声项中静态噪声项的干扰，再利用散斑自相关与相位恢复算法重建去噪后效果更好的成像目标。采用结构相似度对重建效果进行定量评估，仿真结果表明对于给出的成像目标，去噪前后的结构相似度从0.8796提高到0.9875，验证了该方法的有效性。说明所提出的方法能够改善散斑自相关法重建效果。