نتایج جستجو برای: transient analysis

تعداد نتایج: 2926528  

Journal: :acta medica iranica 0
setila dalili pediatrics growth disorders research center, 17 shahrivar hospital, faculty of medicine, guilan university of medical sciences, guilan, iran. seyed mahmood rezvani health center, guilan university of medical sciences, guilan, iran. hossein dalili department of pediatrics, breastfeeding research center, tehran university of medical sciences, tehran, iran. zahra mohtasham amiri department of social medicine, faculty of medicine, guilan university of medical sciences, guilan, iran. hamid mohammadi department of pediatrics, faculty of medicine, shiraz university of medical sciences, fars, iran. sahar abrisham kesh health center, guilan university of medical sciences, guilan, iran.

one of the most preventable causes of mental and growth retardation is congenital hypothyroidism (ch). this study tries to investigate growth and mental outcome of patients with ch. since november 2006 and november 2007 in guilan province, north of iran, all neonates who were diagnosed with ch, evaluated for etiology of ch by laboratory follow up, thyroid sonography or scan. growth and developm...

Journal: :amirkabir international journal of electrical & electronics engineering 2015
a. tofangdarzade a. jalali

in this work, time domain analysis is used to solve adler’s equation in order to obtain the required time, for an oscillator under external injection, reaching the steady-state condition. mathematical approach has been applied to fully describe the transient of frequency acquisition in injection-locked lc and ring oscillators considering their time-varying nature. then, the analysis is verified...

Ali Keyhani, Ali Asghar Ghadimi, Hassan Rastegar,

This paper presents a detailed small-signal and transient analysis of a full bridge PWM DC-DC converter designed for high voltage, high power applications using an average model. The derived model is implemented in a typical system and used to produce the small-signal and transient characteristics of the converter. Results obtained in the analysis of the high voltage and high power design examp...

Hasan Marashi Maziar Habibi-Pirkoohi, Mohammadreza Nassiri, Nasrin Moshtaghi, Saeid Malekzadeh-Shafaroudi Saeid Zibaee

Background: Transient and stable transformation of host plants are the common techniques to produce transgenic plants. However, the main drawback of stable transformation is the fact that it takes quite a long time to produce a transgenic line. While, transient gene expression is a quick method to produce recombinant proteins in plants.  Objective: The main goal of the present study was to eva...

Journal: :acta medica iranica 0
j.lotfi

detection and modification of the risk factors of stroke may be the most effective strategy for preventing its often irreversible consequences. a longitudinal prospective study was implemented to evaluate the effect of several risk factors on the course of cerebrovascular disease. the study groups were composed of 3s8 normal volunteers, and 308 patients with transient ischemic attacks. the two ...

2018
Cristina Cristalli Dariusz Grabowski

Manufacturers would like to increase production volumes while preserving the high quality of their products. The long testing times can cause a bottleneck of production processes especially taking into account the observed tendency for testing all produced devices. The main aim of this work consists in the analysis of time changes of features extracted from thermal images using the multivariate...

2005
Joris Walraevens Dieter Fiems Herwig Bruneel

In this paper, we present a transient analysis of the system contents in a two-class priority queue with single-slot service times. In particular, we derive an expression for the generating function of the transient system contents of both classes. Performance measures are calculated from this generating function. Finally, by means of a numerical example we investigate the impact of the traffic...

Journal: :Applied Mathematics and Computer Science 2014
Gang Chen Zhong-Zhen Yang

A long queue of vehicles at the gate of a marine terminal is a common traffic phenomenon in a port-city, which sometimes causes problems in urban traffic. In order to be able to solve this issue, we firstly need accurate models to estimate such a vehicle queue length. In this paper, we compare the existing methods in a case study, and evaluate their advantages and disadvantages. Particularly, w...

2002
Chi-Kwong Li Bit-Shun Tam Pei Yuan Wu

We offer an almost self-contained development of Perron–Frobenius type results for the numerical range of an (irreducible) nonnegative matrix, rederiving and completing the previous work of Issos, Nylen and Tam, and Tam and Yang on this topic. We solve the open problem of characterizing nonnegative matrices whose numerical ranges are regular convex polygons with center at the origin. Some relat...

2012
P. Do Van A. Barros C. Bérenguer

The sensitivity analysis of complex industrial systems aims at identifying, in a multi-unit structure, which components contribute the most to a variation of the performance criterion. In this paper an importance factor, called multi-directional sensitivity measure, defined as the derivative of the performance in the direction of one parameter, in the direction of a group of parameters (failure...

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