The morphing wing has a significant positive effect on the aerodynamic performance of aircraft. This paper describes leading-edge variable camber with concentrated flexibility based geared five-bar mechanism. driving points skin formed by glass fibre composite sheet were optimized to make deformation smooth. A kinematic mechanism rigidly connected was proposed drive deformation. Besides, new kind flexure hinge designed using pseudo-rigid-body method and applied joint between rigid skin....

The failure of orthopedic and dental implants is mainly caused by biomaterial-associated infections poor osseointegration. Surface modification biomedical materials plays a significant role in enhancing osseointegration anti-bacterial infection. In this work, non-linear relationship between the micro/nano surface structures femtosecond laser processing parameters was successfully established based on an artificial neural network. Then controllable functional with silver nanoparticles (AgNPs)...

Many researches have investigated the changes associated with immobilization-induced osteoarthritis (OA). However, there are only few studies focusing on effect of unilateral knee immobilization cartilage matrix in contralateral mobile knee. The aim present study was to investigate influence knees a rabbit model OA induced by immobilization.Right (experimental knees) eighteen mature female rabbits were immobilized at an extension 180° orthopedic casting tape for 2, 4, or 8 weeks. Left...

Variable camber wing technology is one of the important development trends green aviation at present. Through smooth, seamless, continuous and adaptive change camber, aerodynamic performance improved in achieving increase lift reduction resistance noise. Based on validation model CAE-AVM, Chinese Aeronautical Establishment (CAE) has carried out design a variable wing, proposed an deformation matrix for leading trailing edges aircraft wings take-off, landing cruise conditions. Various...

A vertical rigid-flexible coupling dynamic model of three articulated vehicles with car body flexibility is established, Green functions are utilized to solve the partial differential equation each body, and mechanism flexible resonance analyzed. Results show that geometry filtering phenomenon exists in train, when first bending frequency coincides frequencies which have peak values bounce acceleration transmissibility, resonant vibration will happen; The energy track irregularity decreases...

Helical springs within the primary suspension are critical components for isolating whole vehicle system from vibration generated at wheel/rail contact. As train speeds increase, frequency region of excitation becomes larger, and a simplified static stiffness can no longer represent real property in dynamic model. Coil particular exhibit strong internal resonances, which lead to high amplitudes spring itself as well degradation isolation. In this paper, matrix method is used determine...

Variable camber wing technology stands out as the most promising morphing currently available in green aviation. Despite ongoing advancements smart materials and compliant structures, they still fall short terms of driving force, power, speed, rendering mechanical structures based on kinematics preferred choice for large long-range civilian aircraft. In line with this principle, paper introduces a linkage-based variable trailing edge design approach. Covering coordinated design, internal...

Experiments were performed to investigate the release behavior of potassium and sodium in biomass high-temperature entrained-flow gasification with addition acid oxide SiO 2 , basic MgO, amphoteric Al O 3 . The results showed that volatilization alkali was found strongly depend on temperature. High temperature strengthened release. When reactor 1200°C, species about 37.87% for K 71.14% Na. Three additives all favored retention content water-soluble ash. Among three additives, MgO had best...

Prostatic abscess involving the seminal vesicle is a rare disease due to widespread use of broad-spectrum antibiotics in patients with lower urinary tract symptoms. With elevated risk community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA), great emphasis on its pathogenicity prostatic abscesses required. To best our knowledge, this first study describe ultrasound perfusion imaging and traditional computed tomography diagnose patient CA-MRSA prostate vesicle. In present...

The utilization of fossil fuels makes great challenge in the environment and aggravates global warming. As a result, it is rather significant to use renewable energy develop advanced technologies. It’s necessary study characteristic biomass staged-gasification. paper set up staged-gasification system, which mainly contained pyrolysis two-staged entrained-flow bed. Influence factors were studied including gasification temperature first time, measured tar content by cold trap method (CT)....

A static aeroelastic analysis of the flexible trailing edge is conducted to calculate deformed shape, aerodynamic coefficients and corresponding driving pressure. physical model manufactured using a honeycomb structure, which measured based on binocular vision. The quadratic response surface method adopted establish pneumatic artificial muscle actuator model. wire-pulley transmission built identify existence equivalent forces produce as substitute actuation force. finite element established,...

Abstract Titanium alloy is a clinically approved material for bone substitution. Although three‐dimensional printing (3DP) fabrication technique can build up porous Ti scaffolds with the designed shape and microstructure, biomechanical performance of 3DP still need to be improved increase reliability osseointegration capacity. To address this issue, rabbit marrow clot (MC) used modify by stem cell delivery microenvironment decoration inside pores these scaffolds. Moreover, were built using...

Abstract Ureteral stents are commonly used in clinical treatment of ureteral diseases. There were a series complications, such as biofilms and crusts caused by bacteria after surgery. Therefore, biodegradable with bacteriostatic scaffolds would be the potential to solve above mentioned problems. In this study, nanosilver (AgNP) was added polylactic‐co‐glycolic acid (PLGA) polycaprolactone (PCL) prepare antibacterial scaffold samples 3D printing. The biocompatibility, properties,...

Biomass oxygen-steam gasification associated with synthesis technology known as indirect biomass liquefaction is regarded one of the most promising technologies utilization. In this paper, a comprehensive model was developed for simulation rice straw using ASPEN PLUS. The process divided into two parts: pyrolysis and gasification. RYield module used to simulate an external FORTURN program calculate products while calculated by RCSTR module. With help model, simulated under different...

The shear pin structure is widely used in aeronautics and astronautics structures to deal with emergency separation problems. design has a strict restriction on the precise failure load definite mode. Previous research conducted fracture tests simulations of solid pins while there lack detailed hollow large diameters. In this research, 3-dimensional finite element model was built based actual installed aircraft engine pylon validated by experiment. influences inner diameter process were...

When a carrier-based aircraft is in arrested landing on deck, the impact loads gears and airframe are closely related to states. The distribution extreme values of obtained during life-cycle analysis provide an important basis for buffering parameter design fatigue design. In this paper, effect multivariate was studied based military standards guides. By establishment virtual prototype, extended Fourier amplitude sensitivity test (EFAST) method applied variables. results show that sinking...

When the magnetic bearing rotor is working, iron loss concentration phenomenon may occur on journal, which will cause temperature gradient journal and thermal unbalance. In order to study phenomenon, a multi-physics simulation method considering magnetic-thermal coupling proposed. Using ANSYS Maxwell for modeling finite element analysis obtain causes of in influence different parameters size distribution loss; using COMSOL distribution. The results show that: because initial disturbance,...