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Bandwidth in Satellite systems is a resource typically scarce and expensive. To increase efficiency and contain costs of satellite communications, bandwidth on demand (BoD) mechanisms are often employed, able to make shared resource utilization efficient. Adopting the proper Quality of Service (QoS) approach is of paramount importance to allow the optimal response and guarantee target performance...
The purpose of this work is to provide an enhanced adaptive approach to classic queue-based Bandwidth-on-Demand (BoD) procedures in broadband satellite networks. In queue-based schemes, the controller's objective is to drive the buffer queue length to an appropriate reference queue length, and the efficiency of the control strictly depends on the choice of its reference value. In latest approaches,...
Dairy Industries produce nearly thousands of litres of effluent waste per day. This waste with high intense foul odour pollutes ecosystem and ground water, harbour pathogens causing health hazards. Various pre-treatments methods are available to neutralise the effects. But, bioremediation with EM technology is ecofriendly and helps to clean up contaminated environments through the use of microorganisms.
A preliminary study using gamma radiation on coking wastewater samples was carried out. Chemical oxygen demand (COD), biochemical oxygen demand (BOD) and Ammonia-nitrogen content results were obtained at different doses (1.0, 3.0, 5.0 and 7.0 kGy). As increase of the absorbed doses, a decrease of COD and BOD was observed after irradiation, whereas at the doses of 5 kGy and 7 kGy, the residual concentrations...
Most of wastewater effluent parameters are difficult to measure online. Many soft-sensing methods have been used to predict them, such as the mechanistic approaches and artificial neural networks. In this paper, improved least squares support vector machines for regression (LS-SVR) is proposed. Benchmark Simulation Model No.1 (BSM1) is used to generate input-output data, then effluent parameters,...
The most common test for determining the strength of organic content in wastewaters is the biochemical oxygen demand (BOD). The variables of water quality are temperature, pH value (pH), dissolved oxygen (DO), substance solid (SS), total Kjeldahl nitrogen (TKN), ammonia nitrogen (NH3N), nitrate (NO3), total phosphorous(T-P), and total coliform bacteria (T-coliform). These water quality indices affect...
With the increasing utilization of multimedia applications and triple play services, multimedia traffic (using TFRC-TCP friendly rate protocol) will be occupying an important portion of Internet in competition with TCP traffic. However, the increasing occupation will be accompanied by complex user's bandwidth requests. In satellite based systems such as DVB-S2/RCS, the management of this resource...
In order to overcome the difficulty of on-line measurement for output water quality such as BOD (biochemical oxygen demand) in the waste water process, a second-order soft measurement model based on Lawrence-McCarty formula is established. And to improve the precision of model formula, the restrictive memory least square method is used to identify the system parameter and then the identified model...
We discuss in this paper basic requirements of an RCST gateway supporting VoIP traffic without strict QoS provisioning. Besides easing the system design, a QoS management not based on reservation is suitable to accomplish changes in traffic scenarios and to support new applications. The main elements of this architecture are illustrated throughout the paper following a layered structure. A preliminary...
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