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CO2-expanded ethanol (CXE) was used to extract DHA-containing lipids from Schizochytrium sp. with a 35.7wt% lipid content of dry biomass in a continuous mode. The effects of operation variables such as temperature, pressure, ethanol flow rate and CO2 flow rate on extraction performance were investigated. Based on a 24-central composite design and response surface methodology, the optimal operating...
Methyl parben is an often-used anti-septic chemical in personal care products, and its discharge along with domestic sewage or municipal wastewater resulted in the elevated concentration in natural water bodies. To mitigate its impact to the aquatic environment, this study aimed to investigate the methyl paraban degradation by an aerated pebble-bed biofilm system at various hydraulic retention times...
Localization technology is one of the most important research areas in wireless sensor networks. This paper proposes a set of RF modulation methods to improve the accuracy of localization by utilizing the Receive Signal Strength Indication (RSSI). Two different RF power adjust methods are proposed in this paper. Genetic Algorithm (GA) and Artificial Bee Colony Algorithm (ABC) are used to optimize...
Ranging is one of the most important processes in the uplink of the IEEE 802.16e OFDMA system. A ranging process includes initial ranging, periodic ranging, handover ranging, and contention bandwidth request. Initial ranging provides network entry, uplink synchronization, and system coordination. In the initial state of the transmission process, multiple users transmit randomly selected ranging code...
Ranging is one of the most important processes in the uplink of the IEEE 802.16e OFDMA system. A ranging process includes initial ranging, periodic ranging, handover ranging, and contention bandwidth request. Initial ranging provides network entry, uplink synchronization, and system coordination. In the initial state of the transmission process, multiple users transmit randomly selected ranging code...
In this paper, the control of discrete time cellular neural network (DTCNN) systems via particle swarm optimization (PSO) approach is presented. A novel method for designing templates of cellular neural network for image noise cancellation is discussed. Based on PSO method, this approach can design the templates of cellular neural network and diminish noise interference in polluted images. Finally,...
In this paper, a novel method for designing templates of cellular neural network to cancel the image noise is discussed. The discrete-time cellular neural network (DTCNN) combining with particle swarm optimization (PSO) is applied to image noise cancellation. Based on PSO method, the templates of cellular neural network is optimized to diminish noise interference in polluted image. The demonstrated...
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