The pressure-volume relationship in the ascending aorta ("windkessel") of the hooded seal was determined and the morphology of its vasa vasorum described in some detail. We found that the ascending aorta has a high compliance and can easily accommodate the entire stroke volume when the peripheral vascular resistance becomes much increased and maintain perfusion pressure during the much extended...

This paper systematically discusses the significance of pressure vessel inspection, defines main body annual inspection vessel, and puts forward matters needing attention in process according to existing situation, so as provide a certain reference for smooth development vessels.

Most power plants use the Rankine cycle, where heat supplied to water and steam is converted into mechanical work; therefore, most components have be made of heat-resistant steel. Sufficient properties must ensured for welded pipes meet stringent requirements. Therefore, laser-welded 5 mm thick pressure vessel steel plates were subjected various tests, including high-cycle fatigue tests. The mi...

We study axisymmetric thermomechanical deformations of a thick target being penetrated by a fast-moving rigid cylindrical rod with a hemispherical nose, and presume that target deformations appear steady to an observer situated at the penetrator nose tip. Both isotropic and kinematic hardening of the target material are considered. It is found that kinematic hardening increases the normal stres...

This paper presents the design analysis of saddle support of a horizontal pressure vessel. Since saddle have the vital role to support the pressure vessel and to maintain its stability, it should be designed in such a way that it can afford the vessel load and internal pressure of the vessel due to liquid contained in the vessel. A model of horizontal pressure vessel and saddle support is creat...

the parasites of genus sarcocystis are among the most commonly found parasites in domestic ruminants and some species of sarcocystis can generate important economic loss when causing clinical and subclinical diseases. sarcocystis hominis, one of the three species of sarcocystis that cause muscular cysts in cattle, can infect the human intestinal tract. there is high infection rate of sarcocyst ...

in this paper, multi-stage optimum design of composite pressure vessels is presented. the design variables for composite vessels include the head shape, the winding angle, the layer thickness, the number of layers, and the stacking sequence. a parameter called modified shape factor is introduced as an objective function. this parameter takes into account the effects of the internal pressure and...

The gravitational collapse of a cylindrical thick shell of dust matter is investigated. A spacetime singularity forms at the symmetry axis and it is necessarily naked, i.e., observable in principle. We propose a physically reasonable boundary condition at the naked singularity to construct the solution including its causal future. This boundary condition enables us to construct the unique conti...

PURPOSE Looping patterns rich in laminin are present in tissue samples of primary aggressive human uveal melanomas and their metastases. Because these extravascular patterns connect to blood vessels and transmit fluid in vitro and in vivo, the three-dimensional configuration of these patterns has been the subject of considerable speculation. In the current study, methods were devised to describ...