Synthetic opioids are a chemically diverse group of substances that function as central nervous system depressants, among which the 2-benzylbenzimidazole derivatives, also known nitazenes or nitazene analogs, have recently emerged into recreational market. The detection these in biological samples largely relies on acquisition metabolic data. In this study, first-phase metabolism patterns methylenedioxynitazene, N-desethyl etonitazene, ethyleneoxynitazene, N-pyrrolidino and isotonitazene...

Purpose Although mechanical behavior of rigid frame pier has been clearly recognized, their time-varying seismic performance are yet to be well characterized due some offshore piers that eroded by chloride ion and located in earthquake-prone area. In this study, the time-variant fragility analysis was conducted evaluate under four damage states with considering characteristics material. Design/methodology/approach This paper establishes nonlinear finite element model for investigated...

A theoretical study of the hydraulic jump in a Bingham fluid is presented this paper. Based on approximation for lubrication theory, formulae conjugate depths, sequent bottom shear stress and critical depth are established. Due to absence an exact solution basic equations analytical has been developed. This formula shown provide good results, with small error less than 4%. The results have revealed that ratio depths increase until reaches certain value decreases above that. Both maximum...

The main goal of our work was to study a new loading method for photocatalytic asphalt pavement that could effectively solve the problems degradation efficiency and durability. We adhered nano TiO2 particles microscopically textured structure on surface glass microbeads by cold alkaline corrosion high-temperature adhesion technology. observed good microscopic performance characterization composites. improvement in light transmittance composite material improved catalytic certain extent....

Abstract Based on the pavement temperature data of Sutong Bridge, a prediction model based Long-Short Term Memory neural network was proposed and optimized in this study, an effort to improve early warning reliability bridge state. Next, sufficient time guaranteed for sake fault processing by dividing into three parts: observation window, window window. The experimental results show that comparison with traditional series model, LSTM is more accurate peak prediction, it can effectively...

The article investigates the conjugate problem of free convection and forced along a conducting vertical plate separating two semi-infinite porous reservoirs maintained at different temperatures. mean heat flux through wall temperature distribution on both sides are determined. results show effects resistance parameter Rt free-to-forced-convection Rt* transfer temperatures plate.

The quantum imaging (ghost) has attracted many attention in recent years. In the ghost scheme, object information is captured by "bucket" detector which no spatial information. practical CCD array or APD are utilized as detector, but saturation effect of may exist due to limited sampling depth detector. two methods presented reduce for different detectors. method based on statistic principle imaging, and other compressed sensing. After that, we compare difference between sensing low light...

Abstract In order to improve the shear and energy dissipation capacity, this paper proposes a kind of external replaceable ring segment assembly self-reset pier. The ABAQUS platform is used simulate refined model pier device. Then influence different modes on seismic performance bridge piers studied by pseudo-static analysis. Finally, parameters behavior analyzed. results show that capacity resistance with two lines significantly higher than without devices. Reducing radius can effectively...

Purpose To understand the seismic behavior of reinforced concrete (RC) beams confined by corroded stirrups, low-reversed cyclic loading tests were carried out on seven RC beam specimens with different stirrup corrosion levels and ratios to investigate their mechanical characteristics. Design/methodology/approach The failure mode, hysteresis behavior, skeleton curves, ductility, stiffness degradation energy dissipation are compared discussed. experimental results showed that restraint...

Abstract Anxiety about the long-term seismic performance of precast segmental bridge columns (PSBCs) limits their wide application in harsh environments and high intensities. However, railway route selection inevitably occurs offshore areas, it is urgent to study PSBC considering environmental erosion effects. In order To intensity this paper comprehensively compares time-varying fragility cast-in-place (CPBCs) high-speed bridges. Based on an column, finite element models representative...