Hydrogen sulfide (H2S), as a gasotransmitter, not only plays vital role in mediating many cellular activities but also manifests exciting applications clinical therapy. However, one main obstacle using H2S gaseous therapeutic agent is to realize on‐demand storage and delivery of gas, thus, it great importance develop H2S‐donating vehicle platforms. Although variety polymer‐based gas‐releasing carriers have been designed, almost all the systems are limited spherical structures. Here we...

Hydrogen sulfide (H2S), as a gasotransmitter, not only plays vital role in mediating many cellular activities but also manifests exciting applications clinical therapy. However, one main obstacle using H2S gaseous therapeutic agent is to realize on‐demand storage and delivery of gas, thus, it great importance develop H2S‐donating vehicle platforms. Although variety polymer‐based gas‐releasing carriers have been designed, almost all the systems are limited spherical structures. Here we...

This study investigated the compressive behavior of 30 vol.% boron carbide (B4C)/2024 aluminum (Al) composites under quasi-static and dynamic loading at different temperatures. Building on experimental findings, Johnson-Cook (JC) model was modified, a complete failure criterion proposed. These were validated in Abaqus employing user subroutine for hardening (VUHARD), which incorporated both modified JC (MJC) criterion. Experimental results revealed that strain softening an important feature...

This retrospective study aimed to investigate the effect of mild-to-moderate COVID-19 on risk deep vein thrombosis (DVT) in patients with hip fractures. Hip fractures are common elderly, and previous research has shown that they accounted for 58.3% traumatic older inpatients during pandemic China. Meanwhile, relationship between DVT is complex. Some studies have reported incidence critically ill can be as high 46%, 20% those moderate-to-severe cases. However, impact fracture remains unclear....

Direct functionalization of the C(O)-N amide bond is one most high-profile research directions in last few decades; however oxidative couplings involving bonds and thioamide C(S)-N analogues remain an unsolved challenge. Herein, a novel hypervalent iodine-induced twofold coupling amines with amides thioamides has been established. The protocol accomplishes divergent disconnection by previously unknown Ar-O Ar-S highly chemoselectively assembles versatile yet synthetically challenging...

The end clearance and radial of the gear pump are most important factors affecting its internal leakage viscous friction loss, also total efficiency a high-speed pump. reasonable value is decisive condition for high-efficiency performance pumps. Based on certain type with speed 6000 r/min, influence loss analyzed under rated working outlet pressure 8 MPa. flow field simulation model oil flowing in established PumpLinx. rate shaft power different clearances analyzed. results show that...

In order to investigate the transient hydrodynamic characteristics of water-jet propulsion with a screw mixed pump during startup period and overcome difficulties in measuring process parameters over very short time, method based on flume experiment combined computational fluid dynamics (CFD) is proposed. The thrust torque pump-jet according mooring status at different rotational speeds were measured by test, which provided group data for boundary initial conditions numerical calculation...

Modal parameter identification is a useful tool to reveal natural vibration characteristics in dynamic design and analysis. Due the influence of closely spaced modes with close frequencies large dampings, accuracy using traditional Hilbert–Huang transform always unsatisfactory, since deadline requirement neighboring intrinsic mode functions cannot be satisfied when frequency ratio (high versus low frequency) two adjacent less than two. Therefore, an inverse decaying modulation empirical...

To clarify the flow characteristics of misaligned-phase parallel external gear pump with different phases and rotational speeds, pulsation cavitation under working conditions were systematically studied by combining theoretical analysis tridimensional numerical simulation. The are analyzed. Compared same-phase pump, was reduced. When phase angle is [Formula: see text], pressure pulsations minimum, less than 1/4 pump. relationship between verified. speed different, increase in speed,...

Field experiment and numerical simulation are performed on a 33 kW horizontal axis wind turbine. The distribution of pressure is gathered by disposed 191 taped sensors span-ward seven particular sections blade. And the parameters experimental condition inflow operation turbine obtained at same time. then, three-dimensional Reynolds averaged incompressible Navier-Stokes equations RNG κ-ε turbulence model used to study aerodynamic characteristics method proved be more effective contrasting...

Heat transfer performances and flow structures of laminar impinging slot jets with power-law non-Newtonian fluids corresponding typical industrial (Carboxyl Methyl Cellulose (CMC) solutions Xanthangum (XG) solutions) have been studied in this work. Investigations are performed for Reynolds number Re less than 200, index n ranging from 0.5 to 1.5 consistency K varying 0.001 explore heat structure shear-thinning fluid shear-thickening fluid. Results indicate that the increase n, a given Re,...

Abstract Background The alteration of the prognostic nutritional index (PNI) or utilization distinct anesthesia strategies has been linked to prognosis various cancer types, but existing evidence is limited and inconclusive, particularly for colorectal (CRC). Our objective was evaluate association between PNI change progression free survival (PFS) overall (OS) in patients treated with CRC surgery after propofol-based sevoflurane-based anesthesia. Methods We conducted a retrospective analysis...

The flow-induced noise mechanism of a 5000 rpm high-speed gear pump is explored. On the basis CFD technology and Lighthill acoustic analogy theory, numerical model constructed, effect oil suction pressure (0.1–0.2 MPa) on internal flow field characteristics investigated. To evaluate accuracy simulation, testing platform for pumps was developed. Adding an replenishment groove to suppresses its noise. results indicate that discrete at fundamental frequency harmonic primary component...

Solid–liquid two-phase flowmeters are widely used in critical sectors, such as petrochemicals, energy, manufacturing, the environment, and various other fields. They indispensable devices for measuring flow. Currently, research has primarily focused on gas–liquid flow within flowmeter, giving limited attention to impact of solid phases. In practical applications, crude oil frequently contains particles impurities, leading equipment deformation a subsequent reduction accuracy. This paper...

As a key point of the stealth performance, acoustic characteristics screw mixed water-jet pump were investigated under quasi-submerged state. The relationships between thrust and rotation speed screw-mixed pump, drag, submerged velocity propulsion obtained from flume tests numerical simulation. Based on results unsteady flow field calculation with detached eddy simulation (DES), sound radiation fields at different speeds by finite element method (FEM) coupled vibro-acoustic method....

To research the effects of properties silt particles on cavitating flow, silt-laden cavitation flow in one 3D nozzle is simulated. Silt mean diameters are 0.005 mm, 0.007 0.009 0.010 0.012 0.013 0.015 0.020 0.026 0.030 0.035 0.040 0.046 0.050 mm and 0.056 mm. concentrations vary from 1.0% to 10%. measure particles, vapor contents under pure water conditions calculated compared. Results show that first promote development then inhibit evolution with increase concentration. promotion scope...

High risk of post-surgery complications have always been related with uncontrolled blood glucose, while the relationship between glucose and analgesia has not compared on radical resection colon cancer. The aim this study is to investigate effects multimodal perioperative insulin resistance in patients undergoing cancer.Sixty cancer scheduled for surgery were equally divided into two groups randomly, control group (TAP group) received general anesthesia transversus abdominis plane block...

Introduction: Left ventricular aneurysm is a common complication type of myocardial infarction. Percutaneous restoration (PVR) new and minimally invasive surgical method for left aneurysm. Due to its high demand on the surgeon, careful cooperation anesthesia work great significance successful implementation operation. Case Presentation: During anesthesia, Pulse Index Continuous Cardiac Output (PICCO) not only monitors general hemodynamic parameters, but also displays parameters such as...

The method of modeling a kind highly nonlinear process using neural network is presented, in which CSTR (Continuous Stired Tank Reactor) system involved strong acid-strong base react studied as typical case process, and convergence problem discussed preliminarily during modeling. It has been pointed out that the three layered BP good ability to model pH.

Flow capacity is often measured in the test of intravenous needles for single use. Steady flow measuring principle generally used instruments, makes system intricately, pressure loss instrument itself large and measurement efficiency low. To solve problems above, an unsteady developed revised, which improves accuracy, automatic, simplifies process, reduces costs. A multi-pieces marked check method proposed minimum through every kinds needle