نتایج جستجو برای: راکتور بافل دار abr
تعداد نتایج: 63400 فیلتر نتایج به سال:
در این مقاله راکتور متناوب هیدروژناسیون روغن سویا مدلسازی شده است. راکتور فوق از یک مخزن بزرگ همزن دار دو جداره تشکیل شده که برای مدلسازی آن باید مدل هیدرودینامیکی با مدل سینتیک واکنشهای شیمیایی اصلی بطور همرمان مورد بررسی قرار گیرد. اطلاعات سینتیکی مورد نیاز برای حل سیستم معادلات جرم و انرژی راکتور از روی داده های تجربی موجود در منابع علمی استخراج گردیده است نتایج مدل بسط یافته شده با داده ها...
یکی از روش های بهره بردن از انرژی گرمایی خورشید، استفاده از کلکتورهای خورشیدی هواگرمکن می باشد. در این تحقیق به بررسی روش های مختلف افزایش انتقال حرارت در این کلکتورها پرداخته شده است. بدین منظور اثر استفاده از پره و بافل، بازچرخش جریان هوا در کلکتور و همچنین اثر تواًمان استفاده از پره و بافل و بازچرخش، بر روی عملکرد گرمایی کلکتور هوا گرمکن مورد مطالعه قرار گرفته است. با استفاده از معادلات بقای ...
Background & objectives: Anaerobic baffled reactor (ABR) is one of the low cost wastewater treatment systems compared to the aerobic method. Hoverer it should be studied and developed to overcome its limitations such as insufficient nutrient removal. The aim of this study was to evaluate the efficiency of the 5 sectional ABR pilot and improve it with integrated electric coagulation process for ...
The auditory brain-stem response (ABR) waveform comprises a set of waves (labeled I-VII) recorded with scalp electrodes over 10 ms after an auditory stimulation with a brief click sound. Quite often, the waves are fused (confluent) and baseline-irregular and sloped, making wave latencies and wave amplitudes difficult to establish. In the present paper, we describe a method, labeled moving-minim...
An available bit rate (ABR) service allows applications to access a time-varying network capacity. In a basic ABR service, the available network capacity is divided \fairly" amongst active connections, without regard to the utility that each application derives from the bandwidth allocation. The goal of this paper is to improve both the global and individual utility obtained by applications usi...
This contribution focuses on the important stability issue of ABR traac control with explicit-rate schemes. We develop a novel design approach with three advantages. First, the ABR rate is only adapted to the low-frequency variation of the underlying VBR traac, which eeectively prevents network congestion with much improved control stability. Second, a linear dynamic model is presented which ma...
background and aim: neonatal jaundice is one of the common causes of early sensorineural hearing loss and an important cause of deafness in children. auditory responses are the most sensitive parts of the nervous system to the toxic effect of bilirubin. this study was aimed to examine the effect of neonatal hyperbilirubinemia and its treatment on auditory brainstem responses (abr). methods: ...
ATM Available Bit Rate (ABR) service is intended to o er low cell loss for nonreal-time data sources that can respond to closed-loop ow control. ATM Forum Tra c Management Speci cation Version 4.0 de nes the various parameters used in the ABR ow control, as well as the source, destination, and switch behaviors. However, the switch designers and service providers are free to choose the method of...
The Available-Bit-Rate (ABR) service that is being standardized by the ATM Forum dynamically determines the maximum transmission rate, the explicit rate, of a connection. A drawback of the dynamic control scheme for calculating the explicit rates is that it tries to allocate the same bandwidth to all ABR connections regardless of the application type of the connection. In this study a multi-lev...
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