منابع مشابه
On the Static Instability of Liquid Poppet Valves
This paper focuses on flow induced static instabilities occurring in poppet valves. Computational fluid dynamics simulation were performed to gain static characteristics of the poppet valve and to demonstrate the unstable behaviour of the valve. Based on theoretical considerations, a necessary condition for the stable operation is derived. The study indicates that stability can be obtained with...
متن کاملPerformance Improvement of Proportional Directional Control Valves: Methods and Experiments
This paper studies local valve control of the electro-hydraulic system. The sluggish response of hydraulic control valve usually becomes the bottleneck of whole system performance. Although fast valves (e.g. high-bandwidth servovalves) are available, they are far more expensive than slow valves (e.g. proportional directional control valves). To improve the performance of proportional directiona...
متن کاملATII CAT ETI ADH NO A B C CAMs CAMs CAMs Platelet aggregation DIC
THE LANCET • Vol 356 • July 29, 2000 411 A hypertensive emergency is defined as a situation that requires immediate blood-pressure reduction (not necessarily to .normal values) to prevent or limit targetorgan damage, and a hypertensive urgency is defined as a situation in which blood pressure should be lowered within a few hours. The distinction between emergencies and urgencies is important be...
متن کاملon semihypergroups and hypergroups
in this thesis, first the notion of weak mutual associativity (w.m.a.) and the necessary and sufficient condition for a $(l,gamma)$-associated hypersemigroup $(h, ast)$ derived from some family of $lesssim$-preordered semigroups to be a hypergroup, are given. second, by proving the fact that the concrete categories, semihypergroups and hypergroups have not free objects we will introduce t...
15 صفحه اولThe effects of arterial blood pressure reduction on endocan and soluble endothelial cell adhesion molecules (CAMs) and CAMs ligands expression in hypertensive patients on Ca-channel blocker therapy.
BACKGROUND/AIMS To determine the effect of arterial blood pressure (BP) reduction on endocan and soluble cell adhesion molecules' (sCAM) plasma concentration and expression of their ligands on circulatory leukocyte subpopulations. METHODS 24 hypertensive subjects of both sexes (age: 53±8 yrs) were treated with Ca-channel blocker, amlodipin (5-10 mg/day for 8 weeks; to reach BP≤139/89mmHg). Th...
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ژورنال
عنوان ژورنال: Proceedings of the Institution of Automobile Engineers
سال: 1921
ISSN: 0369-9838,2058-1181
DOI: 10.1243/piae_proc_1921_016_090_02