نتایج جستجو برای: their capability to transmit signal over long distance without any additional amplifiers
تعداد نتایج: 11342387 فیلتر نتایج به سال:
abstract i the purpose of this study was to launch a thorough investigation concerning the possibility of differing orientations to the writing proficiency construct by native and non-native english speaking teacher raters. it mainly revolved around the international english language testing system (ielts) that is widely administered and employed as a measure of general proficiency in englis...
We have investigated the performance evaluation of different Hybrid Optical Amplifiers (EDFA-SOA, RamanSOA, Raman-EDFA) .The proposed configuration consists of 64, 96 and 128 channels at speed of 10 Gbps. We have realized the different hybrid amplifiers and their parameters like BER, Output Power at different numbers of channels. The different can provide better result and better feasibility fo...
abstract type-ii fuzzy logic has shown its superiority over traditional fuzzy logic when dealing with uncertainty. type-ii fuzzy logic controllers are however newer and more promising approaches that have been recently applied to various fields due to their significant contribution especially when the noise (as an important instance of uncertainty) emerges. during the design of type- i fuz...
Introduction The LT1818 and LT1819 are low distortion single and dual operational amplifiers that offer 400MHz gain bandwidth product and 2500V/μs slew rate. The parts operate with supplies from ±2V to ±6V and draw a typical supply current of only 9mA per amplifier. The amplifiers can drive 100Ω loads with a low distortion of –85dBc relative to a 5MHz, 2VP–P signal. In single 5V supply applicat...
background: here we describe a new case of partial distal 10q trisomy in a 6-year-old iranian girl from healthy parents with mental, growth, and psychomotor retardations. methods: additional clinical features include dysmorphic craniofacial features, microcephaly, bilateral hydronephrosis without heart problems, small and rotated low-set ears, bow-shaped mouth, abnormal teeth, short neck, and a...
this thesis attempts to investigate the effects of prelistening activities on enhancing iranian efl learners` listening comprehension. the present study investigated ways in which learners` background knowledge could be activated in order to enhance their l2 listening comprehension by limiting the number of possible text interpretations prior to listening. the experiments conducted in this stud...
investigation the archetype of mother can help the reader to understand poes works, especially his fiction, better, if not fully. motivated by internal and external drives to get into the universe in its manifold form poe was impelled to art and, from various modes of art, to symbolism. how much was poe successful to produce works of art has been a matter of dispute among critics. however, ther...
We transfer an optical frequency over 251 km of optical fiber with a residual instability of 6x10(-19) at 100 s. This instability and the associated timing jitter are limited fundamentally by the noise on the optical fiber and the link length. We give a simple expression for calculating the achievable instability and jitter over a fiber link. Transfer of optical stability over this long distanc...
abstract the main purpose of this study was to investigate whether there was any significant difference between the speaking achievement of learners who were trained by means of consciousness raising of sociolinguistic skills and that of learners who were trained without the above mentioned task. the participants of this study consist of 60 intermediate level students participating languag...
cultural iran is a scope that is more extended than the political territories of iran as a political unit. this concept means that cultural geography(mehdi moghanlo-1383-1) of iran is greater than its political geography which, according to history, has a long history extending west-east from kandahar to the euphrates and north-south from the persian gulf to the caucasus including transoxiana a...
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