Radial pressure

The study aims to evaluate the safety of early - release radial compression time in patients with radial air-inflated pressure devices and to compare the efficacy of early - release radial compression time in patients with radial air - inflated pressure devices with standard methods.

6p visergeyne 18-06-2024 0 0   Download

An analytical approach for nonlinear buckling of functionally graded graphene platelet reinforced composite toroidal shell segments is presented in this paper. The Ritz energy procedure is executed, and radial pressure–deflection expression is constituted to obtain the postbuckling strength and critical buckling pressure of the shells.

7p visharma 20-10-2023 8 4   Download

This paper confirms the practical effect of applying Artificial Neural Networks (ANNs) using Radial basis function (RBF) bases on Sliding mode control (SMC) to control nonlinear systems. The proposed algorithm is put into comparison with the super twisting 2-SMC, which was designed to reduce chattering and increase the performance of conventional SMC.

7p vidoctorstrange 06-05-2023 9 5   Download

The novel distal radial artery (dRA) approach is a popular arterial access route for interventional cardiology and neurointerventions. We explored the dRA as an alternative site to the classic forearm radial artery (RA) for perioperative blood pressure monitoring.

9p viisaacnewton 26-04-2022 6 1   Download

A relatively new uncalibrated arterial pressure waveform cardiac output (CO) measurement technique is the Pulsioflex-ProAQT® system. Aim of this study was to validate this system in cardiac surgery patients with a specific focus on the evaluation of a difference in the radial versus the femoral arterial access, the value of the autocalibration modus and the ability to show fluid-induced changes.

11p viottohahn 30-03-2022 9 2   Download

Central arterial pressure can be derived from analysis of the peripheral artery waveform. The aim of this study was to compare central arterial pressures measured from an intra-aortic catheter with peripheral radial arterial pressures and with central arterial pressures estimated from the peripheral pressure wave using a pressure recording analytical method (PRAM).

8p vizhangzhidong 29-12-2021 3 0   Download

This paper introduces the resistance network model to calculate the hydrostatic pressure distribution of the oil lubrication film. The effect of geometry and working parameters on the pressure distribution is then analyzed. Among these parameters, the calculation results point out that the radial and axial clearance, as well as the eccentricity of the ring gear, have a significant effect on the hydrostatic pressure distribution.

8p spiritedaway36 28-11-2021 7 0   Download

Oganov potentials and period boundary condition to perform molecular dynamics simulation of amorphous and liquid Mg2SiO4 systems under pressures 0 GPa and 40 GPa. We clarify structure of amorphous Mg2SiO4 at 0 and 40 GPa and compared with the one of Mg2SiO4 at liquid state. Especially, the origin of sub-peaks in radial distribution function of O-O, Si-Si and Mg-Mg pairs is explained clearly. The change of radial distribution functions, coordination number and the number of all types of bonds including the corner-, edge- and face-sharing bonds is also discussed in detail in this paper.

9p nguaconbaynhay11 07-04-2021 11 1   Download

The results show that the Ge-Ge, Ge-O bond distance increase but O-O bond distance decreases when increasing the pressure. We find that the peak splitting of Ge-Ge at high pressure corresponds with the Ge-O-Ge and O-Ge-O bond angles. We also find that O-Ge-O bond angle decreases, and Ge-OGe bond angle increases with pressure. The core-sharing-bond is major at ambient pressure, but fractions of edge and face-sharing-bonds increase with pressure.

11p nguaconbaynhay11 07-04-2021 11 2   Download

The microstructure in Mg2SiO4 glass under high compression is studied by molecular dynamic method. This work revealed the correlation between pair radial distribution functions (PRDF) of Si-Si pair and bond angle distribution (BAD) of Si-O-Si and focus on clarifying the split peak of Si-Si PRDF. Moreover, visualizing the bonds of Si-Si at different pressures show changing of Si-Si bonds with pressure. In particularly, as increasing pressure, it forms corner-sharing, edge-sharing and face-sharing bond between SiOx coordination units results in the first peak splitting of c.

11p trinhthamhodang9 10-12-2020 17 0   Download

This paper focuses on the derived equations to evaluate the ultimate strength of ring-stiffened cylinders with local denting damage under combined loadings. The damage generation scenarios in this research are representing the collision accidents of offshore stiffened cylinders with supply ships.

15p trinhthamhodang9 04-12-2020 10 2   Download

Structural properties of Na2O-9SiO2 liquid under compression are studied by computer simulation. The local structure characteristics as well as topology of SiOx are investigated via pair radial distribution function, coordination number, Si-O bond distance and O-Si-O bond angle distribution.

8p viedison2711 03-09-2019 10 0   Download

The models consisting of 19998 atoms were constructed under a wide range of pressure (0-20 GPa) and at 3500K temperature. Structural characteristics were clarified through the pair radial distribution function (PRDF), the distribution of SiOx coordination units and network structure. The result shows that these liquids consist of identical units SiO4, SiO5 and SiO6 and have common partial O―Si―O angle distribution. Furthermore, the major change in the diffusion mechanism under pressure is also considered and discussed.

9p cathydoll4 21-02-2019 29 0   Download

The new second peak of the O-O PRDF at the high pressure originates from oxygen atoms of the edge-sharing bonds. Thus, there is rearrangement of O atoms. O atoms have tendency to more order arrangement that leads to form some oxygen hcp and fcc structure in the model at high pressure.

7p cathydoll4 21-02-2019 24 0   Download

In this paper the structural and dynamical characteristics in alumina- silicate Al2O3– 2SiO2 (AS2) liquid are investigated by molecular simulation method. Structural properties are clarified through the pair radial distribution function, distribution of TOn (T= Si, Al) coordination units and distribution of partial bond angle in TOn. Furthermore the change in diffusion mechanism between low and high pressure is revealed by transition of the structural units TOx → TOx±1. At the lowpressure, liquid AS2 exhibits the dynamics heterogeneity (DH).

8p truongtien_09 08-04-2018 27 0   Download

The major disadvantage of the Greacen et al. (1968) model is that it requires many laborious measurements of soil mechanical properties. A simpler approach was adopted by Romkens & Miller (1971), who equated the pressure required for void-ratio changes occurring in a cylinder of soil around a root with the pressure required for one-dimensional soil consolidation. The resulting equation was used to predict the rooting densities at which further root radial expansion would be inhibited by the expansion of neighbouring roots.

43p loixinloi 08-05-2013 40 4   Download

A centrifugal pump is a rotating machine in which flow and pressure are generated dynamically. The inlet is not walled off from the outlet as is the case with positive dis- placement pumps,whether they are reciprocating or rotary in configuration. Rather, a cen- trifugal pump delivers useful energy to the fluid or “pumpage” largely through velocity changes that occur as this fluid flows through the impeller and the associated fixed pas- sageways of the pump; that is, it is a “rotodynamic” pump.

1792p tiramisu0908 31-10-2012 154 43   Download

The Watt steam engine was the first type of steam engine to make use of steam at a pressure just above atmospheric to drive the piston helped by a partial vacuum. Improving on the design of the 1712 Newcomen steam engine, the Watt steam engine, developed sporadically from 1763 to 1775, was a great step in the development of the steam engine. Offering a dramatic increase in fuel efficiency, James Watt's design became synonymous with steam engines, due in no small part to his business partner, Matthew Boulton.

202p khangoc2392 12-08-2012 57 5   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Radial breathing mode of carbon nanotubes subjected to axial pressure

6p sting04 07-02-2012 52 3   Download

CHAPTER 8 GEARED SYSTEMS AND VARIABLE-SPEED MECHANISMS GEARS AND GEARING Gear tooth terminology Gears are versatile mechanical components capable of performing many different kinds of power transmission or motion control. Examples of these are • • • • Changing rotational speed. Changing rotational direction. Changing the angular orientation of rotational motion. Multiplication or division of torque or magnitude of rotation. • Converting rotational to linear motion and its reverse. • Offsetting or changing the location of rotating motion.

52p medinova 26-10-2010 79 7   Download