细菌不规则生长的计算机模拟

细菌不规则生长的计算机模拟 Simulating of Poorly-Behaved Growth of Bacteria with Computer 周今朝 ZHOU Jin-zhao 1 2 first-author 冯胜彦 FENG Shen-yan 1 2 艾建宇 AI Jian-yu 1 2 武汉大学生命科学学院 武汉大学生命科学学院 College of Life Sciences, Wuhan University College of Life Sciences, Wuhan University 武汉大学生命科学学院,湖北,武汉,430072 武汉大学生命科学学院,湖北,武汉,430072 用改进的R.May方程（Xn′+1=rXn′（1-Xn′））研究了乙酰短杆菌（Brevibacteriumacetylicum）发酵过程中细菌浓度的变化.在R.May方程的基础上,引入r1和r2两个特征参数,以确定体系的混沌特征是否明显.结果表明,实验曲线的r1和r2的值约为3.7.此时,理论曲线和实验曲线吻合较好.由于实验曲线的r1和r2略大于混沌临界值3.55,说明细菌发酵过程中存在混沌.这表明在目前工艺条件下无法对Brevibacteriumacetylicum菌株发酵过程进行精确控制. Based on the equation of X′ n+1 =rX′ n （1-X′ n ）, which was delivered by R.May, the study on concentration variety of fermentation of Brevibacterium acetylicum was carried out. We used two parameters r 1 and r 2 to control the curve. r 1 and r 2 was used to determine whether the system shows obvious characteristics of chaos. The results showed that r 1 and r 2 of experimental curves are about 3.7. At this time, experimental curves and theoretic curves fit well. r 1 and r 2 are a little larger than 3.55 which determines whether the curve shows chaos, So the study proved that chaos exists in the bacteria fermentation. Thus, it is hard to accurately control the fermentation of Brevibacterium acetylicum with current methods. 混沌 细菌 发酵 核苷磷酸化酶 chaos bacteria Fermentation nuleoside phosphorylase Q935 2005-04-01 2021-04-01 4