Many materials are available for retrofitting masonry infill walls to resist explosion loads. Selection of the most suitable material is essential optimal performance and cost. In this study, a series trials were conducted in specially designed test setup determine compare performances 1/2-scale retrofitted with carbon fibre-reinforced polymer strips, steel wire mesh laminated bars, respectively, as well an unreinforced wall, subjected blast High fidelity FE models detail modelling brick,...

Abstract Estimating black carbon (BC) emissions from biomass burning is crucial for accurately assessing the climate impact of this pollutant. In study, we have estimated BC in different geographic regions worldwide at a resolution 0.25° × 1997 to 2023. These findings are modeling on global climatic forcing. Over past 27 years, activities remained stable. The high between 2003 and 2008 were associated with increased precipitation. Southern Hemisphere South America (SHSA) Africa (SHAF)...

This paper is composed of two parts: the generation sand particulate system and insights into grain-level response under static dynamic loadings. First, algorithms for particles are presented, considering randomness in their shape distribution. Improvements to robustness obtained using controlling parameters. Second, we employ take-and-place algorithm, placing grains specimen checking how they overlap form initial model. In order improve porosity specimen, develop compaction algorithm:...

This article is aimed to reveal the dynamic response of layered graded metallic foam under impact loading using a three-dimensional mesoscopic model. First, model for closed-cell proposed based on X-ray computed tomography images. Second, numerical analysis approach presented and validated with test data. Third, it studies behavior numerically. The specimen composed layer by layer. porosity, which fraction voids volume over total volume, different each other layers. Simulations are conducted...

Introduction: Bilateral acute iris transillumination (BAIT) is characterized by bilateral onset of intense pigment dispersion in the anterior chamber, diffuse transillumination, and mydriatic atonic pupils, accentuated deposition angle elevated intraocular pressure (IOP). Herein, we report an unusual case a Chinese patient with BAIT presented to our hospital no defect. Case Presentation: A 37-year-old male settings photophobia, redness, blurry vision. The symptoms began acutely following...

Rotor speed and position detection are integral parts of the closed-loop control system for multi-degree-of-freedom (multi-DOF) ultrasonic motors. The non-contact method is important high-precision spherical rotor. This paper proposes a based on an optical flow sensor velocity-position multi-DOF clamping-type motor. information analyzed using conical L-K algorithm to obtain rotor position. An incremental PID used perform dual positioning motor regarding experimental platform designed,...

An experimental study on the impact force and penetration of falling rocks with three typical shapes, including spherical, conical flat against cushion was carried out. The results show that shape rock has a significant influence results. Under same conditions, blocks have highest force, lowest depth shortest peak time, opposite for rocks, spherical are between two. dimensionless analysis method adopted to convert mass, velocity, shape, size rock, strength density layer into factor I, λ ψ....

There is a significant error in measuring the speed of ultrasonic motors using traditional measurement algorithms, which affects closed-loop operation control accuracy motor. In view this situation, paper proposes an improved Kalman filter algorithm-UKF, can effectively adapt to USM, highly nonlinear and time-varying system. Compared with M method general algorithm, experiment proves that track motor quickly accurately, system be introduced into achieve better performance.

Piezoelectric energy harvesting possesses multiple advantages, including simple structure, easy integration, and the ability to easily convert mechanical from environment into electrical energy. The basic principles, working mechanisms, structures, equivalent circuit models of piezoelectric arrays are elaborated upon, derivation parameters power is conducted. Furthermore, maximum matching resistance for this sensor model determined, sources micro differences between components, amplitude,...