这些代数条件表示为由椭圆与抛物线，椭圆与双曲线确定的广义特征多项式的根的分布。
The algebraic condition can be represented by the distribution of the roots of the generalized characteristic equation of the ellipse and parabola (hyperbola).
首先，通过对系统线性化方程的特征方程根的分布分析，给出了滞量对系统稳定性影响的具体结论和公式。
First locally linearizing nonlinear system at equilibrium to investigate show stability of system, obtain some practicability conclusions and formulas.
研究了水稻、大麦根际和根际反硝化细菌的生态分布。
The ecological distribution of denitrifying bacteria on rhizoplane and in rhizosphere of rice and barley was studied.
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