An ethylene plant employs multiple cracking furnaces in parallel to convert various hydrocarbon feedstocks to smaller hydrocarbon molecules. The continuous operational performance of cracking furnaces gradually decays...
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In this paper,the synchronization of a nonlinear network with time-varying coupling delay is investigated via distributed impulsive *** objective is to design the distributed impulsive controller with minimum coupling...
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ISBN:
(纸本)9781479900305
In this paper,the synchronization of a nonlinear network with time-varying coupling delay is investigated via distributed impulsive *** objective is to design the distributed impulsive controller with minimum coupling strength such that the nonlinear network with coupling delay is globally exponentially *** sufficient conditions have been derived based on Lyapunov-Razumikhin method in terms of matrix *** example is presented to illustrate the effectiveness of the proposed control methods.
Genlstein,the major Isoflavone in soybean,was recently reported to exert beneficial effects in metabolic disorders and inflammatory *** the;present study,we investigated the effects arid mechanisms of a dietary concen...
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Genlstein,the major Isoflavone in soybean,was recently reported to exert beneficial effects in metabolic disorders and inflammatory *** the;present study,we investigated the effects arid mechanisms of a dietary concentration of genlstein on the inflammatory response In lipopofysaccharide(LPS)-treated RAW 264.7 *** results demonstrated that genistein effectively jnhibited the LPS-induced overproduction of tumor necrosis factor-alpha(TNF-α)and interleukin 6(IL-6),as well as LPS-induced nuclear factor kappa B(NF-κB) *** addition,the data also showed that genlstein prevented LPS-lnduced decrease In adenosine moriophosphate-activated protein kinase(AMPK)*** effects were opvj !ously attenuated by an AMPK *** together,our results suggest that the dietary concentration of genlstein is able to attenuate inflammatory responses via inhibition of NF-κB activation following AMPK stimulation:The data provide direct evidence for the potential application of low concentrations of genlstein in the prevention and treatment of Inflammatory diseases.
In this paper,we consider a predator-prey system with modified Leslie-Gower and Holling type Ⅲ *** regarding the time delay as the bifurcation parameter,the local asymptotic stability of the positive equilibrium is *...
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In this paper,we consider a predator-prey system with modified Leslie-Gower and Holling type Ⅲ *** regarding the time delay as the bifurcation parameter,the local asymptotic stability of the positive equilibrium is *** we find that Hopf bifurcations can occur as the time delay crosses some critical *** particular,special attention is paid to the direction of the Hopf bifurcation and the stability of bifurcating periodic *** addition,the global existence of periodic solutions bifurcating from the Hopf bifurcation are considered by applying a global Hopf bifurcation ***,numerical simulations are carried out to illustrate the main theoretical results.
This paper proposes a new incremental learning method based on weighted constraints support vector regression, called ***,a modified nearest neighbor clustering method is used to partition the whole input space into s...
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ISBN:
(纸本)9781479900305
This paper proposes a new incremental learning method based on weighted constraints support vector regression, called ***,a modified nearest neighbor clustering method is used to partition the whole input space into several ***,according to the distance distinguish condition,all the samples in sub-cluster are identified to form the candidate support vector *** each new sample added,it was clustered to an individual candidate support vector subset where the cluster center is the closest to the new ***,in the WCSVR learning process,the object function is modified by introducing a weight for each new sample and the corresponding regularization *** experiment shows prominence of our proposed incremental method in comparison with the standard SVR.
The model of NCS (Networked control Systems) with reduced dimension observer is presented when the network-induced random time-varying delays are bounded and the upper bound of which is longer than one sampling period...
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This paper considers the problem of stability analysis for discrete-time recurrent neural networks with randomly occurred nonlinearities (RONs) and time-varying delay. By utilizing new Lyapunov-Krasovskii functions an...
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Predicting the best shutdown time of a steam ethylene cracking furnace in industrial practice remains a challenge due to the complex coking process. As well known, the shutdown time of a furnace is mainly determined b...
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Predicting the best shutdown time of a steam ethylene cracking furnace in industrial practice remains a challenge due to the complex coking process. As well known, the shutdown time of a furnace is mainly determined by coking condition of the transfer line exchangers （TLE） when naphtha or other heavy hydrocarbon feedstocks are cracked. In practice, it is difficult to measure the coke thickness in TLE through experimental method in the complex industrial situation. However, the outlet temperature of TLE （TLEOT） can indirectly characterize the coking situation in TLE since the coke accumulation in TLE has great influence on TLEOT. Thus, the TLEOT could be a critical factor in deciding when to shut down the furnace to decoke. To predict the TLEOT, a paramewic model was proposed in this work, based on theoretical analysis, mathematic reduction, and parameters estimation. The feasibility of the proposed model was further checked through industrial data and good agreements between model prediction and industrial data with maximum deviation 2% were observed.
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