Abstract A thermoacoustics imaging system is investigated in this paper to enhance conventional modalities geological subsurface situational awareness applications. While has traditionally been used biological scenarios like breast cancer detection, work aims extend geophysical applications by demonstrating that water‐saturated sand can be distinguished from dry and oil‐saturated based on their amplitude differences. This breakthrough enables the feasibility of monitoring water distribution...

The real-time monitoring of corn yield by a combine harvester is critical data source for constructing the histogram, which significantly benefits precision management and decision-making in modern agriculture. While widely used, current photoelectric sensor-based method has limitations. It detects height on each scraper calculates through geometric formula. However, it neglects noticeable difference stacking patterns affected factors such as feeding volume, terrain, driving speed. This...

Effective indoor testing on a four-poster rig of agricultural machinery should mimic the real-world environment while is in farming and transportation. The emerging load spectrum extrapolation compilation are capable speeding up use vibration tractors. However, most ground studies consider particular type rather than all rough farmland conditions that tractors experience daily. Such problem inevitably raises doubts about validating spectrum-based fatigue durability reliability For remedy,...

Contactless and non-destructive measuring tools can facilitate the moisture monitoring of bagged or bulk grain during transportation storage. However, accurate target recognition size prediction always impede effectiveness contactless in actual use. This paper developed a novel 3D reconstruction method upon multi-angle point clouds using binocular depth camera proper Yolo-based neural model to resolve problem. With this method, an embedded low-cost system for in-warehouse bags, which...

Abstract Accurate predictions of fluid flow, mass transport, and reaction rates critically impact the efficiency reliability subsurface exploration sustainable use resources. Quantitative dynamical sensing imaging can play a pivotal role in ability to make such predictions. Geophysical thermoacoustic technology has potential provide aforementioned capabilities, since it builds upon principle that electromagnetic mechanical wave fields be coupled through thermodynamic process. In this letter,...

To suppress the effects of ultra-wideband receiver caused by non-Gaussian noise and difference channel profile, an adjustable observation window length equalisation based on H∞ criterion is proposed. In contrast to existing fixed (FOWL) receivers minimum mean square error (MMSE) criterion, proposed found can adaptively adjust according specific profile. The so designed shown outperform FOWL conventional MMSE in a environment.

Nowadays, the operation of orchard vehicle which is used in China has disadvantages such as single function poor automation level etc. Therefore, it can hardly adapt to complex environment orchard. The electric that powered by electrical drive motor not only save energy, but also achieve goal controlling more conveniently and efficiently. Some vehicles take a variety steering modes. However, most lack targeted terrain design. Electric four-wheel independent have strongly strengthened this...

Light trapping structures can enhance the absorption and reduce thickness costs of solar cells. Among light structures, metasurface structure utilizes Mie scattering to make enter active layer better, thus improving photovoltaic conversion efficiency Herein, we simulated optimized a light-trapping for cells implemented this on Simulation results thin-film silicon-based show that maximum short-circuit current be increased 24.46 mA/cm2 using structure, which is an increase 40.49% compared...

Abstract Seismic and electromagnetic imaging modalities are conventionally used in subsurface situational awareness applications. These have been very effective at characterizing the geological media terms of its constitutive mechanical properties such as density compressibility, well electric conductivity, permeability, permittivity. In order to enhance these capabilities, a Thermoacoustic (TA) system is this work. TA relies on coupling waves through thermodynamic process, it has potential...

Accurately diagnosing blockages in a threshing cylinder is crucial for ensuring efficiency and quality combine harvester operations. However, terms of blockage diagnostic methods, the current state affairs characterized by model-based approaches that can be highly time-consuming difficult to implement, while data-driven lack interpretability. To address this situation, we propose temporal association rule mining (TARM)-based fault diagnosis method identifying discovering knowledge. This...

The moisture content (MC) is a critical factor influencing the quality of wheat. Presently, existing MC sensing methods do not provide swift and precise determination wheat’s MC. This study develops noncontact microwave approach for accurate prediction To be more specific, system employs signals transmitting wheat samples, enabling measurement calculation dielectric constant <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math...

A generalized thermo-elastodynamic model applicable to investigating single- and polycrystalline metallic films for their coupled thermal-mechanical responses ultrafast laser heating is presented. Built upon the two-temperature model, governing field equations feature hyperbolic electron lattice energy transports that admit finite propagation speed incorporate a term of dissipation generation thermally induced mechanical disturbance. Electron transport in thin film investigated in-depth by...

The coupled thermal-mechanical response of a polycrystalline metallic film in to ultrafast optical impingement is investigated. thermo-elastodynamics formulated the article considers laser absorption along axial direction and thermal diffusion radial account for normal shear stresses initiated by rapid heating. generalized formulation incorporates two-step hyperbolic temperature model that characterizes energy transport electrons lattices as finite velocity. coupling mechanical fields...

Near-field thermal–mechanical responses in polycrystalline gold films considering grain size effects and temperature-dependent thermophysical properties are examined using the generalized thermo-elastodynamic model formulated Part I. Ultrashort laser-induced transverse radial thermal stress waves attenuative, broad bandwidth, dispersive with extremely high frequencies. Grain on response found to be so prominent that fields induced film considered for study consistently more intense...

Ultrafast laser-induced ablation is a complex function of many coupled parameters including laser intensity, pulse duration, optical wavelength, material thermophysical properties, and grain size. The predominant belief that ultrafast involves either heterogeneous or homogeneous nucleation results in rapid phase transition the been superheated. However, surface morphology fragmentation ejection by heating with low fluence along fact corresponding lattice temperature lower than melting...

Ablation dynamics focusing exclusively on the thermal field without also considering electron emission and stress is incomplete. The thermo-elasto-plastodynamic model developed in Part I of paper applied to estimate non-thermal ablation onset fracture a polycrystalline gold material response ultrafast irradiation low fluence. Non-thermal complex dynamical process involving incident fluence, thermophysical properties, grain size as primary parameters. Lattice temperatures are found be...

Abstract The microwave-induced thermoacoustic (TA) sensing has been proven to promise a great potential in clinical and biomedical applications. This novel technology also explored boost its use subsurface geophysical A conventional TA system, however, is greatly limited by either slow scan or dramatical cost, making infeasible the real-time monitoring when covering large domains. One remarkable solution of such issues design compressive (CS)-based with aim reducing sampling intensity...

Article Gezielt hergestellte Zement gebundene zusammengesetzte Werkstoffe (ECC) - Neue extrem duktile für dauerhaftere Tragwerke und das Bauinstandsetzen / Engineered Cement-based Composites New Ultra Ductile Materials for More Durable Construction and Repair was published on June 1, 2005 in the journal Restoration of Buildings Monuments (volume 11, issue 3).