This article proposes a novel 3-D surface temperature prediction model based on the restored pseudoheat flux (RPHF) theory. The method can be used to simulate difference between subsurface defect and sound area. proposed shows potential investigate detection limits associated with features, such as depth, radius, diameter-to-depth ratio (D2dR), excitation which is beneficial for experimental design. Several experiments were conducted specimens of different materials [glass fiber reinforced...

This study explores the potential of unmanned aerial vehicles (UAV) thermography to inspect wind turbine blades using natural solar radiation. A comparative numerical analysis and experiments is presented. The simulation was performed realistic boundary conditions. In parallel, outdoor thermal were conducted utilizing a UAV on several customized specimens, including regular glass fiber reinforced polymer boards segment from real blade. results demonstrated detectability internal...

Large multimodal models (LMMs) have shown impressive capabilities in a wide range of visual tasks. However, they often struggle with fine-grained reasoning, failing to identify domain-specific objectives and provide justifiable explanations for their predictions. To address this, we propose novel rejection sampling framework improve the cognition explainability LMMs using self-synthesized data. Specifically, fine-tuning requires images, queries, target answers. Our approach begins by...

Line scanning thermography (LST) is a fast non-destructive inspection (NDI) method for large-scale components. However, the current reconstruction algorithms LST require match between frame rate and velocity. Moreover, these bring in spatial distortions. This paper proposes non-orthogonal reconstructed space LST. In such space, excitation motion line process described as function of time delay, moving velocity estimated by derived position map, achieved image registration. The data are...

Active three-dimensional(3-D) thermography combines 3-D shape and active thermography. Thus, it enables the provision of intuitive thermographic inspection results for composite parts with a complex geometry. However, conventional acquires information through at least two independent sensors requires cross-modal image registration algorithm based on keypoint detection matching. In this article, an system is proposed using only one thermal camera moving objects. This does not require sensor...

YBCO coated conductor is commercially available now and will be widely used in various practical power applications. In these applications, the subjected to different kinds of mechanical stresses strains. To achieve an optimal design devices, transport characteristics under tensile, bending torsional strains were investigated at 77 K self-field. It observed that critical current Ic increases initially with applied strain, reaches a peak εmax then decreases further strain. The improvement can...

The random pulse initial phase radar has potential applications in suppressing digital radio frequency memory (DRFM) repeat jamming, due to the significant differences between jamming and true target echo phases. However, owing randomness existence of false targets, high sidelobe pedestal generated correlation processing will decrease performance detecting. Considering low characteristic under framework compressed sensing (CS), a novel sparsity-driven strategy for identification is proposed...

A photonic ultra-wideband (UWB) quadruplet signal generation based on a dual-polarization quadrature phase shift keying (DP-QPSK) modulator is presented. Gaussian sequence split into four parts and input to the driving ports of DP-QPSK. Through polarization rotation combination, pair polarization-orthogonal, polarity-reversed doublet signals are generated from output DP-QPSK modulator. Subsequently, they injected balanced photodetector (BPD) for further differentiation. After heterodyne...

The critical performance of YBCO tape with inhomogeneous superconducting properties was simulated by use a bad point distribution model and the Gaussian model. current n value whole HTS analysed. reliability simulation verified experimental data. results two models were compared each other. influence on proved which are helpful for devices based tapes.

It is a trend in curriculum construction to extend ideological and political education from specialized courses courses. Based on the characteristics of private applied undergraduate courses, this article takes practice "RJ-45 interface twisted pair" computer network as an example explore spiritual power elements, integrates into teaching case design process cultivate students' achieve goal comprehensive education.

Electromagnetic coil is the key component of rotating equipment, and its reliability very important for normal operation equipment. In order to accurately evaluate health status electromagnetic coil, a evaluation anomaly detection method based on Mahalanobis distance (MD) Box-Cox transformations proposed. With help accelerated fatigue experiment, whole life electrical data high, medium low frequency spectrum collected, are constructed as initial feature set. And then, set mahalanized, taken...

In order to solve the technical problem of large centrifugal compressors' tilting pad bearings in domestic production China, this paper focuses on Type-one and Type-two bearings, proposes uses a transient force feed back simulation technology based FLUENT-UDF address low efficiency issue general fluid-solid coupling. The operation characteristics are studied. Through results, possible causes instability obtained: unreasonable bearing structure preloading, an increased eccentricity journal...

In this paper, the compressive sampling (CS) method is used for two-dimensional (2-D) direction finding (DF) multiple-input multiple-output (MIMO) radar, since angles of targets can construct a sparse vector in angle space. It obvious that dividing space very important method. Thus, we derive resolution limit, which employed Finally, simulated results validate limit to division when using CS algorithm. (4 pages)

This paper derives a new approach, named sinusoidal frequency modulation sparse recovery (SFMSR) for micro-Doppler (m-D) analysis, by exploiting the micro motion spectrum sparsity in SFM signal space. SFMSR employ Fourier dictionary, which is determined only "frequency space". Unlike other SR-based methods whose dictionary discretization of 3D space parameterized amplitude, and initial phase, reduce m-D analysis to 1D parameter optimization, therefore can enhance precision, stability...

Autonomous robotic ultrasound System (RUSS) has been extensively studied. However, fully automated image acquisition is still challenging, partly due to the lack of study in combining two phases path planning: guiding probe scan target and covering surface or volume. This paper presents a system Automated Path Planning for RUSS (APP-RUSS). Our focus on first phase automation, which emphasizes directing probe's toward over extended distances. Specifically, our APP-RUSS consists RealSense D405...