نتایج جستجو برای: vmin diagram
تعداد نتایج: 62677 فیلتر نتایج به سال:
امروزه یکی از مباحث مطرح در بحث امنیت سیستم های اطلاعاتی امکان یکپارچگی امنیت در پروسه طراحی و پیاده سازی این سیستم ها می باشد. زیرا پرداختن به مقوله امنیت در ایجاد سیستم ها به طور منزوی نمی تواند کارایی لازم در برآورد کردن نیازهای امنیتی را داشته باشد. یکی از اجزای مهم سیستم های اطلاعاتی پایگاه های داده می باشند که در بحث یکپارچگی امنیت و طراحی کمتر به آنها پرداخته شده است. در این پژوهش با توج...
We study the problem of solving simple stochastic games, and give both an interesting new algorithm and a hardness result. We show a reduction from fine approximation of simple stochastic games to coarse approximation of a polynomial sized game, which can be viewed as an evidence showing the hardness to approximate the value of simple stochastic games. We also present a randomized algorithm tha...
The Schultz molecular topological index (MTI) is compared with the Wiener index (W) of a molecular graph. It is shown that 2VminW < MTI e 4VmaxW holds for any (connected) graph Γ, with Vmin and Vmax denoting the smallest and the largest valency, respectively, of the vertices of Γ. For molecular graphs these bounds can be further improved. For instance, for benzenoid systems we have the followin...
In this paper, we describe a six-transistor static random access memory (SRAM) cell optimization methodology for transistors with significantly improved matching, while maintaining compatibility with the baseline design. We briefly describe the reduced AVT transistors and show that they allow substantially improved minimum SRAM operating voltage (Vmin) and improved array leakage. Using an effic...
An industrial separation system consisting of four pressure-staged distillation columns has been studied to see if multi-effect integration can be applied to any two columns in the sequence. Shortcut equations and Vmin-diagrams have been used for screening purposes to find the columns with the highest potential for energy savings. The most promising case has then been further studied using rigo...
PURPOSE Examine the effects of incremental and submaximal exercise on structural and hemodynamic changes in the brachial artery flow parameters using Doppler ultrasonography. MATERIALS AND METHODS Twenty four healthy sedentary males (aged 19.54+/-0.59) performed submaximal (15 minutes heart rate to 75% maximal) and incremental (workload was increased 20W every 3 minutes until exhaustion) exer...
BACKGROUND Recent evidence suggests that left atrial (LA) dysfunction may be mechanistically contributing to cerebrovascular events in patients with atrial fibrillation (AF). We investigated the association between regional LA function and a prior history of stroke during sinus rhythm in patients referred for catheter ablation of AF. METHODS AND RESULTS A total of 169 patients (59 ± 10 years,...
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