| 1. | Periodic solution for a microbial ecologic model
一个微生物生态模型的周期解 |
| 2. | Theoretical frame of hydroecological model in the yangtze river valley
分布式流域水文生态模型的理论框架 |
| 3. | The measures to develop red soil are put forth , and the ecological models suitable to red hilly area are expounded
最后提出了红壤开发利用的主要措施，阐述了适应于红壤丘陵区的一些生态模型。 |
| 4. | The stability of the equilibrium in a lotka - volterra competition models with stage structure and distributed maturation delays is concerned
摘要主要考察了具有年龄结构和分布时滞的竞争生态模型平衡解的稳定性，以及连接两个边界平衡解的行波解的存在性。 |
| 5. | 4 . as a test , the research also deals with evaluating and analyzing the quality of agricultural climate resource by using information from crop producing model
( 4 )作为一种尝试，本研究探讨了利用作物生产模型和生理生态模型所提示的信息评估分析农业气候资源质量。 |
| 6. | Stage structure ecological models i . e is considered . it is a two - species system , where the both species have two stages . immature and mature . and the mature species arc aquated
为了能真实的反映这种生理现象，在建立生态模型时常将种群按其生理特征分成幼年和成年两个阶段，即年龄阶段结构模型。 |
| 7. | A mathematic model of two - species competitive with stage structuer is considered . the quality theory of differential equation is applied . the existence and stability of the positive equilibrium are analysed
摘要研究一类具有阶段结构的竞争生态模型，运用微分方程定性理论方法，讨论了各类平衡态的性质，得到正平衡态存在稳定的条件。 |
| 8. | With the above stability criteria , this thesis studies the stability of three systems which are a delayed stirred tank control system , a delayed ecosystem , and a lossless transmission line
3应用上述稳定性准则，分别研究了搅拌槽控制系统、一类生态模型和无损传输线的时滞稳定性。对第一个系统，获得了参数空间下的时滞无关稳定区域。 |
| 9. | Because the linear harvestings to these species could be seemed as diminishing the intrinsic rates of themselves , the model could be formally transformed into a cooperative lotka - volterra ecological model and we could get some idea about it
由于此时该线性捕获问题模型可以形式地转化为互惠的lotka - volterra生态模型，所以，问题的解决有据可循 |
