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44 articles for “Yi Feng”
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Research ArticleOpen accessIn the author namesControlling Chaos of the Ricker Population Model by OGY MethodGuo FengThe chaotic dynamics of the Ricker mapping are studied. Controlling chaos of the Ricker population model is searched by OGY control method. The dynamic behavior in the Ricker mapping is very complex in different values of a. When the value of a is changed from 0.455 to 90, the mapping goes through doubling bifurcation to Neimark-Sacker bifurcation. Several strange attractors … …American Journal of Biochemistry and Biotechnology, Vol. 16, Issue 3 · 8 Sep 2020 · 6,219 accessesView PDFCite
Research ArticleOpen accessIn the author namesBifurcation and Controlling Chaos in a Discrete-Time Biological SystemGuo FengThe dynamics of a discrete-time food chain model with strong pressure on preys is investigated. The types of equilibria of the system are analyzed using stability theory and bifurcation theory. The route to chaos via Neimark-Sacker bifurcation followed by period-doubling bifurcations of invariant curves is found for some parameter values through numerical simulation. Moreover, the chaos is controlled on the … …American Journal of Biochemistry and Biotechnology, Vol. 16, Issue 3 · 7 Jul 2020 · 6,683 accessesView PDFCite
Research ArticleOpen accessIn the author namesDistribution Pattern of SN in Qinghai-Tibet Plateau and Its Relationship with Environmental FactorsXibo Feng, Yan He, Yi Zhang et al.Studying the distribution pattern and driving mechanism of Soil Nitrogen (SN) in the agricultural areas of the Qinghai-Tibet Plateau is of certain significance for the rational use of N fertilizer, improving the quality of land use and protecting the environment. The SN content of cultivated soil in Qinghai-Tibet Plateau agricultural areas was analyzed by combining geographical and meteorological factors. It … …American Journal of Biochemistry and Biotechnology, Vol. 16, Issue 3 · 2 Jul 2020 · 6,629 accessesView PDFCite
Research ArticleOpen accessIn the author namesCloning and Functional Analysis of tri14 in Trichoderma brevicompactumXu-Ping Shentu, Xiao-Feng Yuan, Wei-Ping Liu et al.Trichodermin, one of the trichothecenes, is a potential antifungal antibiotic and a protein synthesis inhibitor. Trichodermin is synthesized mainly by Trichoderma brevicompactum, but the biosynthetic pathway has yet been completely elucidated. Our earlier transcriptome assay on the trichodermin synthesis in T. brevicompactum 0248 identified a unique tri14 transcript, designated Tbtri14, that was co-regulated with other tri cluster genes. However, the … …American Journal of Biochemistry and Biotechnology, Vol. 11, Issue 3 · 25 Aug 2015 · 7,395 accessesView PDFCite
Research ArticleOpen accessIn the author namesEpigenetic Mechanisms in Hepatitis C Virus-Associated Hepatocellular Carcinoma: A Potential New Link Between Stem Cells, Virology and CancerQinghua Feng, Sajida Hassan, Trina Das et al.Recent studies suggest that epigenetic mechanisms are not only essential for the dynamic transcriptional regulation in embryonic and somatic stem cells, but are also actively involved in tumorigenesis: genes important for pluripotency are epigenetically regulated and aberrant epigenetic changes have been detected in virtually all human malignancies studied, including Hepatocellular Carcinoma (HCC). Infection with Hepatitis C Virus (HCV) is a … …Current Research in Medicine, Vol. 4, Issue 1 · 12 Mar 2013 · 8,039 accessesView PDFCite
Research ArticleOpen accessIn the author namesSpace Distribution of Highland Barley GNS and its Relationship with Environmental Factors in the Qinghai-Tibet PlateauXibo Feng, Gaihua Wang, Jianlin WangIn order to study the space distribution of Grain Number per spike (GNS) and its relationship with the environmental factors in the Qinghai-Tibet Plateau, 83 data samples from different ecological areas were selected for GNS inverstigation. Meanwhile, the seeds of highland barley were harvested and planted in the farm of Xizang Agriculture and Animal Husbandry College; the varieties without genetic … …American Journal of Biochemistry and Biotechnology, Vol. 14, Issue 2 · 26 Apr 2018 · 10,838 accessesView PDFCite
Research NotesOpen accessIn the author namesAn Artificial Design Technique to Optimize Signal PeptideGao Cui-Fang, Wang Sen, Tian Feng-Wei et al.To determine optimal artificial signal peptide candidates for the possibility of creating high levels of secretion of heterologous proteins, substitution and redesign of amino acid sequences in the H-domain of the signal peptide was theoretically attempted. The method was based on comprehensive score matrix and Markov transfer matrix, which can make the artificial sequences maintain the structural characteristics and original … …American Journal of Biochemistry and Biotechnology, Vol. 13, Issue 3 · 21 Jul 2017 · 8,069 accessesView PDFCite
Research ArticleOpen accessIn the author namesMulti-Phase Support Vector Regression Soft Sensor for Online Product Quality Prediction in Glutamate Fermentation ProcessRongjian Zheng, Feng PanGlutamate fermentation is inherently nonlinear, multi-phase and an aerobic fermentation process. As long measurement delays and expensive apparatus cost, on-line measurement of the product concentration is not necessarily available. The present fermentation process monitoring and quality prediction involve manual interpretation of highly informative, however, the concentrations of substrates, biomass and products are only low frequency off-line measurements. In this paper, … …American Journal of Biochemistry and Biotechnology, Vol. 13, Issue 2 · 6 Jun 2017 · 8,070 accessesView PDFCite
Research ArticleOpen accessIn the author namesStable Nitrogen Isotopic Changes in Winter Wheat (Triticum aestivum L.) Induced by its Growth TemperatureZhou Feng Wang, Wei Guo Liu, Rui Juan HaoThe nitrogen dynamics of plants can be quantified using the variation in their δ15N level. This reveals details of plant physiological characteristics and the relationship between plants and their growth conditions. To better understand plant nitrogen dynamics and the effects of external temperature changes on their nitrogen isotopic composition, we investigated the δ15N characteristics in Triticum aestivum and its mother … …American Journal of Agricultural and Biological Sciences, Vol. 12, Issue 1 · 21 Mar 2017 · 8,127 accessesView PDFCite
Research ArticleOpen accessIn the author namesSoft Sensor Modeling of Product Concentration in Glutamate Fermentation using Gaussian Process RegressionRongjian Zheng, Feng PanThe on-line control of glutamate fermentation process is difficult, owing to the typical uncertainties of biochemical process and the lack of suitable on-line sensors for primary process variables. A prediction model based on Gaussian Process Regression (GPR) is presented to predict glutamate concentration online. First, Partial Least Squares (PLS) is applied to extract the features of the input secondary variables … …American Journal of Biochemistry and Biotechnology, Vol. 12, Issue 3 · 17 Sep 2016 · 7,667 accessesView PDFCite