Numerical simulations are used to investigate the hydrodynamic benefits of body–fin and fin–fin interactions in a fish model carangiform swimming. The geometry kinematics reconstructed three-dimensions from high-speed videos live fish, Crevalle Jack ( Caranx hippos ), during steady employ an immersed-boundary-method-based incompressible Navier–Stokes flow solver that allows us quantitatively characterize propulsive performance median fins (the dorsal anal fins) caudal fin using...

This paper describes a computational study of the hydrodynamics ray-inspired underwater vehicle conducted concurrently with experimental measurements. High-resolution stereo-videos vehicle's fin motions during steady swimming are obtained and used as foundation for developing high fidelity geometrical model oscillatory fin. A Cartesian grid based immersed boundary solver is to examine flow fields produced due these complex artificial pectoral kinematics. Simulations carried out at smaller...

A lift enhancement mechanism due to wing-body interaction (WBI) was previously proved be significant in the forward flight of insect flyers with wide-shape bodies, such as cicada. In order further explore WBI and its effect a flapping platform different wing body shapes, numerical investigations were performed on hummingbird this paper. high-fidelity computational model modeled geometric complexity. The kinematics prescribed using experimental data from previous literature. An...

In this study, the unsteady flow and acoustic characteristics of a three-dimensional (3D) flapping wing model Tibicen linnei cicada in forward-flight are numerically investigated. A single is modelled as membrane with prescribed motion reconstructed from high-speed videos live insect. The numerical solution takes hydrodynamic/acoustic splitting approach: field solved an incompressible Navier–Stokes solver based on immersed boundary method, linearized perturbed compressible equations. 3D...

With the continuous expansion of development scale, photovoltaic integrated greenhouses are becoming an important type smart grid prosumer. The demand side management (DSM) energy is increasingly in terms satisfying consumption requirements production and increasing economic benefits same piece land. By analyzing greenhouse activities operation electrical equipment, a particle swarm optimization (PSO) scheme proposed this paper, which selects starting time time-shifting powers as factors...

Early-onset schizophrenia (EOS) occurs between the ages of 13 and 17 years, neurobiological factors leading to cognitive deficits psychotic symptoms with varying degrees positive negative symptoms. Numerous studies have demonstrated a broad link immune dysregulation central nervous system in EOS, its pathogenesis involves dysfunction, but exact biological mechanisms not been elucidated. This study employs infiltration analysis bioinformatics unveil pathogenic EOS identify potential...

Traditional thrombolytic therapy is limited by low specificity, uncontrollable bleeding complications, and secondary vascular re-embolism. To address this issue, we developed a thrombin-responsive sequential targeted nanoplatform (MMSN-UK/TI@pep-Fuco) for efficient thrombolysis based on the attack-defense-protection integrated strategy. Herein, multilevel mesoporous silica nanoparticle with multiple pore sizes was synthesized modified fucoidan (Fuco) using compound peptide (pep) as bridge to...

With the high proportion of wind and photovoltaic (PV) power connection in new electricity system, system output volatility is enhanced. When fluctuation suppressed, pumped storage condition changed frequently, which leads to vibration enhancement unit a decrease safety. This paper proposes pump turbine health evaluation model based on combination weighting method cloud PV scenario. The wind–PV characteristics complementary year (8760 h) typical week four seasons (168 are analyzed, frequent...

This paper is associated with a video winner of 2015 APS/DFD Gallery Fluid Motion Award. The original available from the Motion, http://dx.doi.org/10.1103/APS.DFD.2015.GFM.V0088

As one of few animals with the capability to execute agile yawing maneuvers, it is quite desirable take inspiration from hummingbird flight aerodynamics. To understand wing and body kinematics associated aerodynamics a performing free maneuver, crucial step in mimicking biological motion robotic systems, we paired accurate digital reconstruction techniques high-fidelity computational fluid dynamics (CFD) simulations. Results reveal that achieve pure yaw utilizes very little pitching,...

This paper numerically investigates the energy expenditure of coflow wall jet for separation control by analyzing widely studied NASA hump with two-dimensional unsteady Reynolds averaged Navier–Stokes equations. The is shown to be effective in both adverse and favorable pressure gradients but more efficient due lower velocity, entropy increase, enhanced mixing. An energy-efficient way devise a flow twofold: 1) place injection near onset point at slightly downstream location, 2) suction slot...

Differing from the maximum lift coefficient for takeoff/landing, cruise must have high aerodynamic efficiency and sufficient stall margin. Conventional 2D subsonic airfoil has typical CL in range of 0.4 to 0.6. This study introduces a flapped CoFlow jet(FCFJ) achieve about one order magnitude higher 4 with constraint that should be 50, similar CL/CD level baseline no flow control. The regular CFJ applies injection very close leading edge at 2-4%Chord location. FCFJ long flap(60%C) applied...

The unbalanced forces generated by pumped storage units operating under non-ideal conditions can cause pressure pulsations. Due to the noise interference, feature information reflecting state of unit in pulsation is difficult extract. Therefore, this paper proposes a reduction method based on sparrow search algorithm (SSA) optimized variational mode decomposition (VMD) combined with singular value (SVD). Firstly, SSA used realize adaptive optimization VMD parameters for ideal signal. Then,...

While depression and certain cardiac biomarkers are associated with acute myocardial infarction (AMI), the relationship between them remains largely unexplored. We examined association depressive symptoms in patients AMI.

Abstract The purpose of this study is to obtain the reference range peripheral perfusion index (PPI) asymptomatic well newborns at 6 72 h life different altitudes. A population-based prospective cohort was conducted in cities altitudes China. Asymptomatic were enrolled consecutively from six hospitals with an altitude 4 4200 m between February 1, 2020, and April 15, 2021. PPI measured 6, 12, 24, 48, after birth on right hand (pre-ductal) either foot (post-ductal) using a Masimo SET Radical-7...

This paper presents a 3D Co-Flow Jet (CFJ) active flow control airfoil with an integrated micro-compressor at different flight conditions that make the actuator work operating conditions. The simulations are performed Mach 0.25, 0.3, and 0.4 angle of attack varying around cruise condition. RPM embedded is controlled to achieve variety satisfy designed for high efficiency required mass rate in order CFJ maintain desired momentum coefficient (Cµ). For each number, points studied by fixing...