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1)  presentation switch
图象开关
2)  on-off phenomena
"开-关"现象
3)  stability switches
开关现象
1.
The stability of a positive equilibrium point of the following predator-prey model are investigated dx(t)dt=rx(t-τ)-Dx(t)-αx-2(t)y(t)x-2(t)+β-2 dy(t)dt=kαx-2(t)y(t)x-2(t)-β- 2-ey(t)-cy-2(t) The necessary and sufficient conditions of unconditional stability are given f or this system and stability switches are discussed.
研究食饵与捕食者两种群生态系统dx( t)dt =rx( t-τ) -Dx( t) -αx2 ( t) y( t)x2 ( t) +β2dy( t)dt =kαx2 ( t) y( t)x2 ( t) +β2 -ey( t) -cy2 ( t)的稳定性 ,给出了该系统正平衡态无条件稳定的充要条件并讨论了其开关现
2.
?Stability of a positive equilibrium point of the following predator-prey model are investigatedNecessary and sufficient conditions of unconditiond stability are given for this system and stability switches are discussed.
研究食饵与捕食者两种群生态系统的稳定性,给出了该系统正平衡态无条件稳定的充要条件,并讨论了其开关现象。
3.
Necessary and sufficient conditions of unconditional stability are given and stability switches are discussed.
研究了食饵与捕食者两种群生态系统的稳定性,给出了该系统在正平衡点处无条件稳定的充要条件,并讨论了其开关现
4)  Image expansion
图象展开
5)  presentation switch
图像开关
6)  switching graph
开关图
1.
In the second part, we studied the automorphisms, vertex-transitive and spectrum of switching graph, and the Cayley graph is invariant on the switched action by the algebraic method.
第二部分采用代数的方法研究了开关图的自同构群﹑点传递性和谱,并得到Cayley图的开关图依然是Cayley图。
2.
Use adjacency matrix of the original graph means adjacency matrix of its switching graph according to the definition of the switching graph first,then use characteristic polynomial of the original graph means characteristic polynomial of its switching graph.
首先根据开关图的定义用原图的邻接矩阵表示其开关图的邻接矩阵,然后用原图的特征多项式表示其开关图的特征多项式。
补充资料:“孤岛”现象
中国一些地区虽然有单个相对强大的中心城市,但由于地
理、交通、城市设置、政策因素等一系列条件的限制,使这些城
市只能以%26ldquo;孤岛%26rdquo;形式发展,难以形成大、中、小城市合理布局
的城市体系,中心城市的聚集效益不能有效地扩散。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条