Anechoic coatings, attached to the surface of underwater vehicles, are an effective way absorb incident sound from active sonars. It is well known that a homogeneous viscoelastic material layer with limited thickness does not provide significant absorption performance, thus, anechoic coatings embedded air cavities being used for applications. Previous optimization works on this type coating mainly focused geometrical parameters, position and shape internal cavity, while ignoring influence...

Electroosmotic drainage has been proposed as a method for reducing moisture content and simultaneously increasing shear strength, thereby enhancing the stability of soft clays. Understanding electroosmotic consolidated soil behavior under wet-dry cycles is vital assessing long-term performance in changing environment. In this investigation, electroosmosis-treated clay specimens were prepared subjected to different wetting-drying cycles. The experimental results emphasized that case which...

Steam curing is a widely used method in the production of industrial precast concrete but it often leads to thermal damage that negatively impacts material’s long-term durability and mechanical strength. The use supplementary cementitious materials (SCMs) has shown considerable promise improving pore structure alleviating these adverse effects. This study employs high-resolution X-ray computed tomography (X-CT) thoroughly assess how steam temperatures various subsequent regimes influence...

Embedding links in brand logos is a promising technology, which allows consumers to access the online information of products by capturing physical logo images. Previous data hiding methods primarily embed within cover media global manner, making them ineffective for processing vector graphics format with transparent background. To address this issue, we propose paper novel deep scheme invisibly embedding printed trademarks. Specifically, encoder embeds only into area under constraints mask,...

<title>Abstract</title> To quickly and effectively predict the unknown top earth pressure of high-filled cut-and-cover tunnels (HFCCTs), a prediction model HFCCTs based on machine learning was proposed. The data set established by taking Poisson 's ratio, friction angle, cohesion, ratio groove width to HFCCT width, slope angle filling height as input parameters ML models, maximum vertical output parameter, correlation between analyzed. Newton-Raphson-based optimization (NRBO) used optimize...

High-filled cut-and-cover tunnels (HFCCTs) can be used to reclaim usable land due the unique landforms in western China. The load reduction methods reduce earth pressure on such (CCTs) significantly affect safety of CCTs. This paper describes a study three measures: expanded polystyrene (EPS); combination EPS and geogrid; EPS, geogrid, concrete wedges. PFC2D, computer program based discrete-element method (DEM), was employed analyze examine evolution mechanisms. Parametric studies were...

High-filled cut-and-cover tunnels (HFCCTs) are common in northwestern China because their construction allows usable land over the CCT to be reclaimed. However, due unique landforms of Loess Plateau this region China, amount backfill soil that is needed for HFCCTs enormous, and must high enough maximize land. Currently, main challenges ultrahigh earth pressure safety concerns related existing lining structure. This paper discusses physical modeling tests were conducted investigate (1) load...

The present study investigated the influence of key design parameters on seismic performance prefabricated precast assembled piers’ connection parts to better adapt industrialized construction pier connected using grouting sleeves. Relying a bridge in actual project, ABAQUS software was used establish refined solid finite element model piers with Numerical simulation analysis conducted for low circumferential reciprocating loading. evaluated terms hysteresis characteristics, dissipation and...

When the sliding bearing is fixed only at top of middle column underground structure, cracks side end plate should be aggravated while seismic damage mid-column alleviated. To enhance performance mid-plate, a new isolation design method has been mentioned elastic bearings are set mid-columns and between mid-plate wall same time. By establishing nonlinear finite element analysis model for static-dynamic coupling interaction system, response characteristics cast-in-place station structure...

The railways in the Gobi area have serious sand hazards. To prevent these hazards and ensure operational safety, plant-based prevention is a fundamental measure for control of railway wind-sand This study considers protective windbreak forest belts along Lan-Xin Railway, Northwest China as evaluates its benefits from perspectives windproof efficiency using numerical simulations wind tunnel testing. Our results show that disrupting effect three shelterbelt rows on airflow was significantly...

Abstract Deformation and failure of the roadway surrounding rock under dynamic disturbance were explored, which is essential for control rock. The impact on deformation was studied from a single factor perspective using numerical simulation software. intensity, frequency, time determined to affect plastic zone Firstly, multi-factor integrated study achieved an orthogonal experimental design, three factors by applying mean value extreme difference. results show that degree influence roof &gt;...

N-ethoxycarbonyl-N′-o-methoxyphenylthiourea was synthesized and characterized by elemental analysis, TG-DTA IR, 1H NMR spectrum, single crystal X-ray diffraction analysis. The compound crystallizes as a planar molecule in the monoclinic space group P2(1)/c, with = 9.690(2)Å, b 8.595(2)Å, c 15.944(4)Å, α 90°, β 106.467(4)°, γ Dcalc 1.326 g/cm3 for Z 4. Intramolecular H-bonds promote stability of title change coordination ability thiourea ligand. Intermolecular N─H…S link pairs two molecules.

This work employs a multiscale simulation framework to systematically explore the spallation behavior of ductile tantalum (Ta) subjected high strain rate impacts. The approach integrates macroscopic simulations, utilizing both Lagrangian mesh and Smoothed Particle Hydrodynamics (SPH) methods, with microscopic molecular dynamics (MD) simulations dissect dynamic failure processes tantalum. validated against experimental data, demonstrate effectiveness SPH method in accurately capturing...