In this paper, two kinds of pumice particles with different diameters and water absorption rates are employed to substitute the corresponding size river sands by volume fraction, their effects on hydration characteristics persistent shrinkage Ultra-High Performance Concrete (UHPC) investigated. The obtained experimental results show that adopting a low dosage 0.6⁻1.25 mm saturated as internal curing agent in UHPC can effectively retract deformation concrete without decrease strength. Heat...

Smart-sensing coatings that exhibit multistimulus response, rapid indication, and reusability are in urgent need to effectively enhance the practicability of while accurately detecting metal corrosion. In this work, a reusable corrosion self-reporting coating with multiple pH Fe3+ stimulus responses was first constructed by integration composite fluorescent probe into resin matrix. This sensor combining lanthanide metal–organic framework (Ln-MOF) based on terbium trimeric acid (H3BTC)...

This study concentrates on the supersonic side-jets in crossflow (SJIC), which appears aerospace flights equipped with reaction control systems (RCS). Despite advancements computational fluid dynamics (CFD) through use of Reynolds-averaged Navier–Stokes (RANS) equations and eddy-viscosity turbulence models (EVMs), discrepancies remain between CFD predictions experimental data. These underscore need for further refinement predictions. Our research focuses optimizing accuracy SJIC modeling...

Simulation of straw grinding process based on discrete element method (DEM) was proposed. According to the force analysis and kinematics analysis, differential equation particle motion hammers deduced, formation mechanism material circulation layer obtained. Geometric model grinder, contact were established by EDEM software. The influence hammer number, thickness gap hammer-sieve number power consumption obtained single factor simulation test. is divided into three stages. smashing plays a...

Highlights A visualization method for the motion of strawberry leaves in an air-assisted spray field is proposed. Strawberry showed two states different critical velocity ranges sprayer airflow. The airflow instability and turbulence effect are considered important factors leaf vibrations. azimuth angle range 90° to 270° can provide good deposition with smaller droplets. Abstract . reasonable crop plants improve droplet deposition. Therefore, this study focuses on mechanism field. First,...

The textured thin films of fluorine-doped tin oxide (FTO) were prepared onto preheated glass substrates by a spray pyrolysis technique, using dehydrate stannous chloride (SnCl2:2H2O) and ammonium fluoride (NH4F) mixed with alcohol, as precursor. haze properties the heat treated at different temperatures from 400 to 550 characterized X-ray diffraction (XRD), 3D Digitale Mikroskop, Atomic Force Microscopy, UV-Vis spectrometer, sphere photometer four-probe instrument. results show that,...

Air-assisted spray technology is widely applied in high-efficiency pesticide applications. The resistance characteristics of the crop canopy reflect its energy dissipation effect on assisted airflow, connecting structure canopy, airflow velocity, and droplet deposition effect. Using a common broad-leaf as research object, air-assisted field were investigated this study by performing theoretical analysis wind tunnel tests. Further, feasibility using was assessed to evaluate results showed...

To improve the drill pipe fracture failure phenomenon in deflecting drills with ultra-short radius flexible pipes, this study establishes a mechanical model of an pipe, numerically simulates characteristics under conventional drilling process using finite element analysis method, performs performance tests on and optimizes improves its structure. The results show that, gradual increase bending angle unit section, upper pressure section decreases rapidly friction increases approximately...

Abstract The in‐situ V 8 C 7 ‐V 3 B 4 /Fe45 composites were fabricated by vacuum sintering using ferrovanadium, carbon black and Fe45 alloy powders as raw materials. microstructure, phase structure hardness of sintered Fe45+x wt.% (FeV+C) composite specimens (x = 0, x 5, 10, 15, 20) investigated. results show that the type shape borides carbides depend on content mixed powders. When consists α‐(Fe, Cr, V) solid solution, strip M block 2 borides. particles initiate inside precipitation,...

Simulation of straw grinding process based on discrete element method (DEM) was proposed. According to the force analysis and kinematics analysis, differential equation particle motion hammers deduced, formation mechanism material circulation layer obtained. Geometric model grinder, contact were established by EDEM software. The influence hammer number, thickness gap hammer-sieve number power consumption obtained single factor simulation test. is divided into three stages. smashing plays a...

The paper presents the developed novel software package of education computer simulation for control system in Internet. construction is described. main page, interface, exchange interface and experiments are given. power electronics converter also made.

Finite element analysis software is the main tool for and verification of complex lug. The commercial represented by ANSYS occupies position in field finite element. Based on open source SALOME Code_Aster, using Python language Pyqt5 framework, a lug simulation system developed, which has functions guide type rapid modeling, automatic high-quality mesh generation, acquisition linearization path, evaluation report issue. completely independent controllable replaces conventional method...

One high fidelity numerical method is extended to compute the unsteady aerodynamic loads when micro rotary wings suffer wind. The solutions are obtained by solving Navier-Stokes equations, where field velocity proposed carry out atmospheric perturbation. convective terms approximated a order WENO-Roe scheme, and time advance performed an implicit scheme of dual stepping which can guarantee degree efficiency. Moving overset grids used facilitate implement rotational motion relative movements...