Coral sand has individual characteristics that differ from silica sand, such as creep behavior is always attributed to particle crushing under high stress states. To understand the of coral general levels, three series comparative triaxial tests relevant deviator stress, confining pressure, and relative density were performed on creeping for more than 5 days. The volumetric, axial, shear creeps are considerably larger those particularly a relatively pressure. volumetric strain was found be...

Food-borne methicillin-resistance Staphylococcus aureus (MRSA) has caused significant health threats and economic loss in livestock poultry products. Garlic essential oil (GEO) is an effective antibacterial agent but presents strong instability hydrophobicity. In this study, GEO water nanoemulsion (GEON) with good stability was produced by emulsification technique of high-power ultrasound. Its activity underlying mechanism against MRSA isolated from retailed pork were investigated. Results...

Under the effect of strong earthquakes, collisions or excessive inter-story displacements may occur between adjacent building structures to extent that structure is damaged. The traditional seismic measures for these can no longer meet needs in practical engineering. In this paper, we propose application parallel and serial TID-based control systems buildings as an example a single-story building, use it form new reduction structure. dynamic characteristics design parameter optimization...

For slender FRP columns, predicting the global buckling critical loads is crucial in structural design. However, there a lack of consensus prediction method based on specialized domain knowledge. To address this issue, study created comprehensive database by collecting 365 experimental data related to axially loaded pultruded columns predict using such machine learning methods as extreme gradient boosting, artificial neural network, and support vector regression. The accuracy stability were...

Methicillin-resistant Staphylococcus aureus (MRSA) is a major bacterial pathogen that causes hospital- and community-acquired infections. Owing to its multidrug resistance, it imperative develop new antimicrobial agents treat MRSA In this study, using genome mining analysis culture-based screening method detect bacteriocin activity, we screened strain, Bacillus sp. TL12, which harbored putative leaderless gene cluster (bac cluster) exhibited potent anti-MRSA activity. The agents, products of...

Emergency bridges are crucial to providing emergency relief supplies those isolated residents affected by natural disasters. To increase the bridge's load-bearing capacity and adaptability for different obstacles in military or disaster relief, a novel Bi-Plane V (BPV) shaped prestressed unbonded retrofit cable system was applied reinforce an bridge assembled using glass fiber-reinforced polymer (GFRP) rectangular tubes steel components. The reinforcing can prestress wire cables adjusting...

To achieve light weight, high load-carrying capacity, and corrosion resistance, a novel hybrid FRP-aluminum space truss system is proposed in detail. An advanced pretightened teeth connection (PTTC) its combined joint–aluminum bolt–ball connecting (ABCS) were designed to interconnect pultruded FRP elements. In view of the significant effect ABCS on structural deformation, axial stiffness properties first investigated through experimental tests numerical simulations. Then, establishing...

Abstract The South-to-North Water Diversion Project (SNWDP) is a cross-basin large-scale water infrastructure, whose operational management faces many complex risks. This study constructs an safety risk analysis model based on fuzzy VIKOR-FMEA. First, the expert team used linguistic variables to evaluate severity of each failure mode (S), frequency occurrence (O), and difficulty detection (D) in effects (FMEA). Then, analytic hierarchy process (AHP) maximal deviation approach were integrated...

With the improvement of performance optical equipment carried by on-orbit spacecraft, requirements vibration isolation are increasing. Passive platforms widely used, but ability to suppress low-frequency deterministic disturbance is limited, especially near system’s natural frequency. Therefore, an active control strategy proposed improve passive performance. In this paper, a Youla parameterized adaptive system introduced piezo-actuated active–passive structure. A linear quadratic Gaussian...

For rational disposal of solid wastes, low-cost cemented paste backfills (CPB) were prepared with iron tailings, ground granulated blast-furnace slag (GGBS), and calcium carbide (CS). To ensure that CPB can be effectively utilized in mine backfill projects, the effects contents, GGBS content, CS/GGBS ratio, mixing water on workability mechanical properties investigated. The results indicated when content was 70%, 14%, ratio 0.4, tap water, fluidity fresh slurry 167 mm, 28d unconfined...

Abstract This paper presents an experimental investigation of overall buckling behaviour carbon fibre reinforced plastic (CFRP) tubes with different off-axis ply orientations. A series specimens are designed and prepared stacking sequences [0 ∘ 4 /± θ∘ ], θ corresponding to either 0, 90, 45 or 60. Axial compression tests effective end-reinforcement hinge support performed investigate the behaviour. With respect future design application CFRP this type sequence, column curves for each all...

Abstract The carbon/glass hybrid rod exhibits high tensile strength, light weight, and strong corrosion resistance. However, the bottleneck of interlayer splitting exists in rod, severely impeding safe operation. To solve problem splitting, this paper proposed a new scheme an intralayer rod. Based on material constitutive model, full‐scale simulation model was developed. stress distribution deformation were analyzed progressive damage mechanism explained. results indicated that, for (a)...

Constructing lunar pavements is of great significance for improving the transportation efficiency materials and personnel transfer at bases. Utilizing regolith in-situ preparation geopolymer an effective means supplying raw pavement construction. This present study prepared geopolymers material with simulant. The influence NaOH on compressive strength was understood by using different percentages as alkaline activator. effect urine artificial pH values liquid phases. results indicated that...