The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Li Wang - One of the best experts on this subject based on the ideXlab platform.
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the nonlinear system Design Technique based on dynamic equilibrium state theory
International Conference on Innovative Computing Information and Control, 2007Co-Authors: Li WangAbstract:The nonlinear system Design Technique based on the dynamic equilibrium state theory is a new Design Technique based on the concept of the asymptotically stability of the control system dynamic equilibrium state. It first Designs a referenced system according to a given performance, then takes the state of the referenced system as the dynamic equilibrium state of the original control system, Designs a control law to make the system state move to its dynamic equilibrium in a scheduled way. When apply this method in the Design of nonlinear tracking, the Design process is straightforward and the simulation result is right, and the meanings of the dynamic equilibrium state can also be deeply understood.
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the nonlinear system tracking Design based on the dynamic equilibrium state theory
Chinese Control Conference, 2006Co-Authors: Li Wang, Qinglin WangAbstract:The nonlinear system Design Technique based on the dynamic equilibrium state theory is a new Design Technique based on the concept of the asymptotically stability of the control system dynamic equilibrium state. It first Designs a referenced system according to a given performance, then takes the state of the referenced system as the dynamic equilibrium state of the original control system, Designs a control law to make the system state move to its dynamic equilibrium in a scheduled way. When this method is applied in the Design of nonlinear tracking, the Design process is straightforward and the simulation result is right, and the meanings of the dynamic equilibrium state can be deeply understood.
Sangeeta Negi - One of the best experts on this subject based on the ideXlab platform.
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optimization of concomitant production of cellulase and xylanase from rhizopus oryzae sn5 through evop factorial Design Technique and application in sorghum stover based bioethanol production
Renewable Energy, 2016Co-Authors: Ajay K Pandey, Gnansounou Edgard, Sangeeta NegiAbstract:Current study deals with the production of cellulases and xylanases from the Rhizopus oryzae SN5 isolated from composed soil of Himalayan pine forest, in order to meet the challenges of lignocellulosic biomass based biorefineries. Culture parameters for concomitant production of cellulase and xylanase were optimized through EVOP-factorial Design Technique under solid state fermentation. And maximum yield of cellulase and xylanase were obtained 437.54 U/gds and 273.83 U/gds, respectively at 30 °C and pH 6.0 after 5 days of incubation. On applying these enzymes for the saccharification of the dilute acid pretreated Sorghum Stover (SS), 0.407 g/g sugar was yielded. This hydrolysate on fermentation, yielded 0.411 g/g ehanol with Saccharomyces cerevisiae (NCIM 3288), which could be considered a good conversion. Therefore, Rhizopus oryzae SN5 was found as potent strain for the production of the cocktail of lignocellulosic biomasss hydrolytic enzymes and would be promising tool in the area of lignocellulose based bio-refineries.
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use of evolutionary operation evop factorial Design Technique to develop a bioprocess using grease waste as a substrate for lipase production
Bioresource Technology, 2011Co-Authors: Sunil Kumar, Nitin Katiyar, Priyanka Ingle, Sangeeta NegiAbstract:Abstract The aim of the present work was to develop a bioprocess using EVOP-factorial Design Technique employing grease waste as a substrate for the production of lipase. A newly isolated fungal strain of Penicillium chrysogenum was explored for the fermentation process. Solid-state fermentation (SSF) was carried out using grease waste and Czapek-dox medium, supplemented with wheat bran. The yield of lipase was 38 U/ml when SSF was carried out at 32 °C for 8 days and grease:wheat bran:Czapek-dox media in 1:1:2 (w/w/v). Different physicochemical parameters affecting the production of lipase were optimized through evolutionary operation (EVOP) factorial Design Technique and after optimization yield was enhanced up to 46 U/ml at 30 °C, pH 7.0 with 1:1:2 (w/w/v) grease waste:wheat bran:Czapek-dox media. Industrial grease waste has never been reported before for the production of industrially important lipase enzyme.
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optimization of amylase and protease production from aspergillus awamori in single bioreactor through evop factorial Design Technique
Food Technology and Biotechnology, 2006Co-Authors: Sangeeta Negi, Rintu BanerjeeAbstract:Summary Evolutionary operation (EVOP) factorial Design Technique was explored in order to economically produce amylase and protease at their optimum level in a single bioreactor by modified solid-state fermentation. Maximum yields of amylase and protease were achieved, using wheat bran as a substrate by a highly potent, locally isolated strain of Aspergillus awamori: Nakazawa MTCC 6652. The strain had been induced previously, inferring the ability to produce both enzymes concomitantly in a single bioreactor with their maximum capacity. The highest secretion of amylase and protease were measured to be 9420.6 and 1930 U/g, respectively, at 37 °C. pH and relative humidity were found to be optimum at 4 and 85 %, evaluated through EVOP method.
T Gaier - One of the best experts on this subject based on the ideXlab platform.
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an mmic low noise amplifier Design Technique
IEEE Transactions on Microwave Theory and Techniques, 2016Co-Authors: Mikko Varonen, Rodrigo Reeves, Pekka Kangaslahti, L Samoska, J Kooi, Kieran Cleary, Rohit Gawande, Ahmed Akgiray, A Fung, T GaierAbstract:In this paper we discuss the Design of low-noise amplifiers (LNAs) for both cryogenic and room-temperature operation in general and take the stability and linearity of the amplifiers into special consideration. Oscillations that can occur within a multi-finger transistor are studied and verified with simulations and measurements. To overcome the stability problem related to the multi-finger transistor Design approach a parallel two-finger unit transistor monolithic microwave integrated circuit LNA Design Technique, which enables the Design of wideband and high-linearity LNAs with very stable, predictable, and repeatable operation, is proposed. The feasibility of the proposed Design Technique is proved by demonstrating a three-stage LNA packaged in a WR10 waveguide housing and fabricated using a 35-nm InP HEMT technology that achieves more than a 20-dB gain from 75 to 116 GHz and 26–33-K noise temperature from 85 to 116 GHz when cryogenically cooled to 27 K.
Mikko Varonen - One of the best experts on this subject based on the ideXlab platform.
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an mmic low noise amplifier Design Technique
IEEE Transactions on Microwave Theory and Techniques, 2016Co-Authors: Mikko Varonen, Rodrigo Reeves, Pekka Kangaslahti, L Samoska, J Kooi, Kieran Cleary, Rohit Gawande, Ahmed Akgiray, A Fung, T GaierAbstract:In this paper we discuss the Design of low-noise amplifiers (LNAs) for both cryogenic and room-temperature operation in general and take the stability and linearity of the amplifiers into special consideration. Oscillations that can occur within a multi-finger transistor are studied and verified with simulations and measurements. To overcome the stability problem related to the multi-finger transistor Design approach a parallel two-finger unit transistor monolithic microwave integrated circuit LNA Design Technique, which enables the Design of wideband and high-linearity LNAs with very stable, predictable, and repeatable operation, is proposed. The feasibility of the proposed Design Technique is proved by demonstrating a three-stage LNA packaged in a WR10 waveguide housing and fabricated using a 35-nm InP HEMT technology that achieves more than a 20-dB gain from 75 to 116 GHz and 26–33-K noise temperature from 85 to 116 GHz when cryogenically cooled to 27 K.
J Kooi - One of the best experts on this subject based on the ideXlab platform.
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an mmic low noise amplifier Design Technique
IEEE Transactions on Microwave Theory and Techniques, 2016Co-Authors: Mikko Varonen, Rodrigo Reeves, Pekka Kangaslahti, L Samoska, J Kooi, Kieran Cleary, Rohit Gawande, Ahmed Akgiray, A Fung, T GaierAbstract:In this paper we discuss the Design of low-noise amplifiers (LNAs) for both cryogenic and room-temperature operation in general and take the stability and linearity of the amplifiers into special consideration. Oscillations that can occur within a multi-finger transistor are studied and verified with simulations and measurements. To overcome the stability problem related to the multi-finger transistor Design approach a parallel two-finger unit transistor monolithic microwave integrated circuit LNA Design Technique, which enables the Design of wideband and high-linearity LNAs with very stable, predictable, and repeatable operation, is proposed. The feasibility of the proposed Design Technique is proved by demonstrating a three-stage LNA packaged in a WR10 waveguide housing and fabricated using a 35-nm InP HEMT technology that achieves more than a 20-dB gain from 75 to 116 GHz and 26–33-K noise temperature from 85 to 116 GHz when cryogenically cooled to 27 K.