This paper presents a similarity-based approach for estimating the Remaining Useful Life (RUL) in prognostics. The is especially suitable situations which abundant run-to-failure data an engineered system are available. Data from multiple units of same used to create library degradation patterns. When RUL test unit, it will be matched those patterns and actual life as basis estimation. tackle challenge problem defined by 2008 PHM Challenge Competition, which, unspecified provided set...

With the rapid development of communication technology, optical fiber has become a key research area in communications. When there are two signals fiber, transmission them can be abstracted as high-order coupled nonlinear Schrödinger system. In this paper, by using Hirota’s method, we construct bilinear forms, and study analytical solution three solitons case focusing interactions. addition, adjusting different wave numbers for phase control, further discuss influence on soliton...

We propose an effective and robust method for terahertz (THz) image super-resolution based on a deep convolutional neural network (CNN). A CNN model is designed. It learns end-to-end mapping between the low- high-resolution images. Blur kernels with multiple width noise levels are taken into training set so that can handle THz images very well. Quantitative comparison of proposed other methods synthetic indicates performs better than in accuracy visual improvements. Experimental results real...

A linear oscillating motor provides short-stroke reciprocating motion directly and is widely used in actuation systems. However, with the increase of frequency to achieve high power density, large mover mass becomes main obstacle. Existing solutions either sacrifice force density or fabrication difficulties for dynamic performance. In this paper, a novel compound Halbach magnet array proposed moving-magnet tubular high-frequency applications. structure, dual-layer magnets are utilized better...

This paper focuses on measures towards sustainable development of coal ports based the economic, environmental, and social dimensions triple bottom line, examines integration optimization roles smart technologies port sustainability in era Internet Things. By investigating representative case Huanghua Port, one largest transportation China, this enables a better understanding port’s practices driven by technologies. study provides intelligent renovation, dust pollution treatment, air...

An intragastric balloon robot is a less invasive and effective method for morbid obesity treatment. Traditional robots need insertion tools endoscopes placement removal of balloons in the stomach, which may cause complications such as nausea sickness. This paper proposes novel capsule treatment with wireless powering communication. It placed stomach through patient's swallowing esophagus squirming motions. The system then inflated occupies to arouse feeling satiation. communication systems...

In order to enhance the performance of a continuous-wave photocathode electron gun at Peking University, and achieve beams with higher current brightness, multifunctional drive laser system named PULSE (Peking University Laser System for high-brightness Electron source) has been developed. This innovative is capable delivering an average output power 120 W infrared pulse 81.25 MHz, as well approximately 13.8 green reliable stability. The utilization two stages photonic crystal fibers plays...

The rapid development of renewable energy requires transmission technology innovation. Fractional frequency system (FFTS) is a promising solution for large-scale transmission, and the stability analysis essential engineering application. Especially grid faults, these large-signal disturbances are inevitable during operation. Thus, system-level Takagi-Sugeno fuzzy model FFTS proposed considering parameters, control strategy modular multilevel matrix converter ( <inline-formula...

The general model of beam wander for a coherent Gaussian propagating through atmospheric turbulence is extended to the case partially polarized electromagnetic Gaussian-Schell (EGSM) beam. expression obtained by characterizing EGSM with effective parameters. effects initial spatially lengths, degree polarization, and phase curvature are examined in detail. A condition derived under which beams different spatial coherence degrees polarization will generate same wander.

Prostate cancer represents a significant health concern for middle-aged and elderly men in China, where both incidence rates are climbing detection treatment methodologies trail behind those of Western countries. This study aims to enhance the diagnostic processes prostate through application machine learning techniques. The research concentrates on enriching equilibrating medical datasets using Extra Trees prediction model. A comparative analysis confirms effectiveness this model developing...

Terahertz frequency-modulated continuous-wave (THz FMCW) technology has become a widely used nondestructive testing tool due to its imaging and detection advantages. Nonlinearity is one of the most common problems with FMCW technology. This inability maintain strict linearity during high-frequency sweep process, resulting in multiple frequencies calculated intermediate frequency (IF) signal. reduces capability system, as effective are swamped. paper proposes nonlinear correction method based...

In this article, a wideband watt-level digital power amplifier (DPA) with high efficiency and large dynamic range is presented in CMOS technology for wireless applications. To achieve output enhanced operation bandwidth (BW), the matching network based on reconfigurable power-combining transformer used. Meanwhile, <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$L$ </tex-math></inline-formula> –...

Abstract Melanoma accounts for 75% of all skin cancer deaths. Pulsed photothermal radiometry (PPTR), optical coherence tomography (OCT) and ultrasound (US) are non‐invasive imaging techniques that may be used to measure melanoma thickness, thus, determining surgical margins. We constructed a series PDMS tissue phantoms simulating melanomas different thicknesses. PPTR, OCT US measurements were recorded from results compared in terms axial range, resolution time. A Monte Carlo simulation...

The large intra-class difference and inter-class similarity of scene images bring great challenges to the research remote-sensing image classification. In recent years, many classification methods based on convolutional neural networks have been proposed. order improve performance, studies increase width depth network extract richer features, which increases complexity model reduces running speed model. solve this problem, a lightweight hierarchical-wise convolution fusion (LCNN-HWCF) is...

We present SynchronizAR, an approach to spatially register multiple SLAM devices together without sharing maps or involving external tracking infrastructures. SynchronizAR employs a distance based indirect registration which resolves the transformations between separate coordinate systems. attach Ultra-Wide Bandwidth~(UWB) measurements module on each of mobile AR is capable self-localization with respect environment. As users move independent paths, we collect positions in their local frames...

Due to the shape diversity and occlusion problem, non-invasive inspection of cultural relic with special-shaped structures has always been bottleneck existing imaging technology. We propose a virtual unrolling technique that can extract content from similar folded paper scroll, exploiting three-dimensional capability provided by terahertz computed tomography (THz CT). The method performs THz CT on object obtains several slice images its cross section. Considering morphological properties...

Background Bone cement leakage (BCL) is one of the most prevalent complications percutaneous kyphoplasty (PKP) for treating osteoporotic vertebral compression fracture (OVCF), which may result in severe secondary and poor outcomes. Previous studies employed several traditional machine learning (ML) models to predict BCL preoperatively, but effective intelligent methods bridge distance between current real-life clinical applications remain lacking. Methods We will develop a deep (DL)-based...

In this paper, a neoteric algorithm based on two-dimensional continuous wavelet transform is developed to get the defect contour in terahertz (THz) non-destructive testing result obtained from raster-scan frequency-modulated continuous-wave (FMCW) THz imaging system. order prove method's validity, an experiment carried out. The of shows that method allows one extract FMCW interference with severe stripe noises. Moreover, relative error area between actual value and extracted no more than...

Spherical actuator is an electric device that can achieve multiple degree-of-freedom rotary motions in a single joint. Permanent magnet array key factor influences the output performance of electromagnetic spherical actuators. In this paper, novel three-dimensional (3D) pole proposed to improve system flux density and thus performance. Analysis magnetic field distribution extremely important for actuators with 3D arrays. Thus, investigation conducted analytical, numerical, experimental ways....