查询词典 stability conditions

We obtain the conditions of asymptotical stability of the pest-eradication periodic solution and permanence of the system.

在第四章中，应用天敌助增(即天敌的人工繁殖和释放)的方法，建立了在固定时刻释放天敌的具有一般功能性反应的三种群的食物链模型，并系统地研究了系统在释放天敌这种外在的不连续受迫作用下的动力学性质，得到了害虫根除周期解存在性和渐近稳定性，以及系统持续生存的条件。4。

This project was conducted starting with the three interrelated subjects the structural characteristics of desertification landscapes in different bioclimatic zones, desertification driving factors and their function mechanism, and the dynamic model of landscape space for the occurrence and development of desertification in representative desertification regions and on the basis of in-depth studies of the relations between landscape structural characteristics and processes of desertification and their stability; the driving force of different time-space scales of desertification and their proportion, manifestation form, and action mechanism in the desertification processes; and the establishment of threshold conditions for the surface wind erosion and has achieved important progress in the definition of desertification conception

本课题从三个相互联系的专题（即不同生物气候区荒漠化景观的结构特征、荒漠化驱动因素及其作用机理、典型荒漠化地区荒漠化发生与发展的景观空间动力学模型）入手，在深入研究荒漠化景观结构特征与过程的关系及其稳定性，不同时空尺度的荒漠化过程驱动力及其在荒漠化过程中所占比重、表现形式及作用机制，地表风蚀临界条件的确定等内容的基础上，虽未建立荒漠化景观空间动力学模型，但在沙漠化概念，末次间冰期以来沙漠化过程时间序列和特征冷暖时期沙漠、沙地空间分布格局，现代沙漠化过程中自然因素和人文因素的作用、贡献率、沙漠化土地对气候的反馈作用以及风蚀临界值，沙粒跃移轨迹参数和能量分布，我国沙漠化防治思路和对策，沙尘暴区划和沙尘暴指数等方面取得了重要进展。

The existence of the bionomic equilibrium is studied. After that, we consider the system with time-varying harvest effect, sufficient conditions are obtained for the global stability of bionomic equilibrium by constructing a suitable Lyapunov function.

其次分析了生态经济平衡点的存在性，并进一步考虑时变捕获作用的系统，通过构造恰当的Lyapunov函数，得到生态经济平衡点全局稳定的充分条件。

Commercial results indicate that FH-UDS deep hydrodesulfurization catalyst has well HDS/HDN activities and stability and can satisfy demands for producing low sulfur dieslel under high caustical conditions.

工业应用结果表明：FH-UDS柴油深度加氢脱硫催化剂具有良好的加氢脱硫、脱氮活性和稳定性，能够满足柴油加氢精制装置生产低硫柴油和高负荷运行的要求；对操作条件进行适当调整，可以生产出硫质量分数小于10μg/g超低硫柴油。

By chemical stability test under storage conditions of illumination and 25℃, it showed that cefradine dihydrate crystal was obviously more stable than anhydrous one.

同时通过光照及25℃贮存条件下的化学稳定性试验，表明头孢拉定二水物结晶比无水物结晶明显稳定。

Suffcient conditions for the existence and exponential stability of equilibria of the networks are obtained.

得到了平衡点存在以及指数稳定的充分条件。

The basic reproduction number is established. Existence and stability of equilibria are studied with conditions only related to this number.

建立了模型的基本再生数，得到了平衡点的存在性和稳定性只依赖于此再生数。

Forepassed researches on conditions of selfenforcing environmental agreements are focused on coalition stability. Here the notion of coalition equilibrium is used to discuss the possibilities to sign the climate convention under four representative cases.

以往的研究大多通过联盟稳定性概念论述&自我强制&协议的条件，本文则通过联盟均衡概念分析四种典型情形下达成合作协议的可能性。

Thus, on the reservoir conditions of the seventh middle area of JiaMuHe and eighth area of XiaWuErHeZu, the qualities of blocking agent such as gelatification time, the gel strength, the salt resistance, the temperature resistance, the stability, the compressive strength, the selection of injection, the improvement ratio of water entry profile and the sweeping efficiency were evaluated.

评价了堵剂在七中区佳木河组和八区下乌尔禾组两种油藏条件下的成胶时间、成胶强度、抗盐性、抗温性、时间稳定性、耐压强度、选择注入性、吸水剖面改善率和驱油效率。

The concept of harmonic control between two systems is presented. Necessary and sufficient conditions are given for harmonical stabilization of two systems. These results can be generalized to harmonic stability problems for more than two systems. Examples are given to illustrate the results.

摘要提出了两个系统协调控制的概念，主要研究了不同系统间的互助合作问题，给出两个系统间可协调稳定的充要条件及构造协调控制律的算法，并举例说明了所给结果的有效性，这些结果都可以向多系统协调稳定问题推广。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。