| 1. | The almost periodic solution to quadratic differential equations with almost periodic coefficients
二次概周期系数微分方程的概周期解 |
| 2. | 1 the nonau - tonomous single - species harvesting model with periodic coefficients we study is given ?
1给出非自治单种群捕获模型； 3 |
| 3. | The property of solutions for a class of higher order linear differential equations with periodic coefficients
一类高阶周期系数线性微分方程解的性质 |
| 4. | Our results include almost all nonautonomous single - specie harvesting models with periodic coefficients ; for example : logistic model , gompertz model . gilpin model . aynala model
其所得结果包括了许多常见的具周期系数的非自治收获模型，如： logistic型， gompertz型， gilpin型， aynala型等。 |
| 5. | Abstract : in this paper , we discuss stability of two order linear differential equations with periodic coefficient and obtain some criterias for recogniting stability
文摘:讨论周期系数二阶线性微分方程的稳定性问题.给出了判定稳定性较精确的方法，利用这个方法，获得了判定稳定性简洁而实用的若干准则 |
| 6. | Last , in chapter 3 , we consider the discrete - time competition model with periodic coefficients where p > 0 is constant , - periodic sequences . the persistence of the positive solutions of ( 3 ) and sufficient conditions for the existence and stability of the positive periodic solution of ( 3 ) are obtained , our results extended the corresponding work in [ 17 , 18 , 19 ]
第三章，考虑具周期系数的单物种竞争模型其中{ ( n ) } ， { ( n ) }都是以为最小正周期的周期序列，研究了该方程的正解的持久性与周期解的存在性和稳定性，所得结论拓广了[ 17 ， 18 ， 19 ]中的工作。 |
| 7. | 3 . in the paper , we consider gordon theory of a class of single - species ecological systems with periodic coefficients on open - access fishery , and set up the ordinary economic equilibrium conditions of the single - species and get globally asymptotically stable economic equilibrium ; the over - exploitation of the system and the modification on economic equilibrium conditions by opportunity cost are investigated
考虑了一类具周期系数的单种群生态系统的gordon理论，建立了单种群系统最为普遍的经济均衡条件，从而找到了全局渐近稳定性的经济均衡点；并对系统因捕获造成的过度开发，以及对gordon经济均衡条件的改进作了相应研究。 |
| 8. | In the latter , the non - linear dynamic stabilities of the single rotor system with a crack are researched . the non - linear differential equ ations have periodic coefficients . and using the stability theory of the periodic motion , it is discussed that the thickness of the disk , the position of the disk and the position of the crack have effects on the dynamic stabilities
首先简单讨论了含裂纹的单盘转子系统的线性动力稳定性，并与相关的文献作出比较，验证了等效线弹簧模型的正确性和精确性；然后，讨论了含裂纹的单盘转子系统的非线性动力稳定性，得到了一组具有周期系数的非线性微分方程组，且利用周期运动的稳定性理论进行了求解，深入讨论了盘的厚度，盘所处的位置和裂纹所处的位置对转子系统动力稳定性的影响。 |
