查询词典 attractivity

In this paper, the global attractivity is investigated firstly, which includes the existence and stability of positive trivial solution, the attractivity of positive solution, etc.

本文首先研究了三类生态模型解的渐进性，其中包括正平衡态的存在性和稳定性，正解的吸引性等，其次讨论了一类单种群模型解的振动性问题。

We obtain some sufficient conditions which ensure the boundedness and global attractivity of the systems.

得到了系统有界性和零解的全局吸引性的充分条件。

By applying the comparison theorem and some new analysis technique, some sufficient conditions which guarantee the permanence of the system are obtained. After that, by constructing a suitable Lyapunov function, sufficient conditions which ensure the global attractivity of the system are obtained.

利用差分方程的有关理论，使用与前面不同的分析方法，获得保证该系统永久持续生存的充分性条件；其后通过构造适当的差分Lyapunov函数，得到保证该系统全局吸引的充分性条件。

In Chapter 4, we study the global attractivity of monotone random dynamical systems.

在最后一章，我们研究了单调随机动力系统的全局吸引性。

Using Mawhin s theroy and Liapunov funtional we discuss the existence and global weak attractivity of periodic solutions for a class of functional differential equation.

利用Mawhin的迭合度理论和Liapunov泛函，讨论了一类泛函微分方程的周期解的存在性和全局弱吸引性。

Furthermore, when the system is a periodic system, sufficient conditions are obtained that guarantee the existence, uniqueness and global attractivity of the positive periodic solution by applying the Brouwer fixed theorem and the method of constructing Liapunov function.

利用比较原理给出了系统一致持久性的充分条件；当系统是周期系统时，应用Brouwer不动点原理和构造Liapunov函数的方法给出其存在惟一且全局吸引的ω-周期正解的充分条件，并通过实例验证了文中定理条件的可实现性。

When used alone, nepetalactone attracted mosquitoes to the trap of the olfactometer, however, when mixed with human odor or a L-lactic acid dichloromethane solution, nepetalactone inhibited the attractiveness obviously. Nepetalactone exhibited a spatial repellency, but was not an ideal topical repellent. DEET did not have the attractiveness to mosquitoes, and did not exhibit inhibition on L-lactic acid dichloromethane solution too, hut enhanced the attractivity of human odor to mosquitoes.

风洞定向行为测试结果表明，假荆芥内酯单独作用时，对蚊虫有微弱的引诱效果，但在人体气味及二氯甲烷L-乳酸存在时，可显著抑制这些引诱物对蚊虫的引诱效果，是优良的空间驱避剂；DEET对蚊虫无明显的引诱作用，对二氯甲烷L-乳酸溶液引诱剂也无明显的抑制效果，但可显著增强人体气味对蚊虫的引诱性。

In chapter3 of this article, We will concentrate on the existence of periodic orbit when thecondition that enables the global attractivity is destroyed.

本文中，在不满足他们给出的充分条件下，我们分析了系统解的动力学性质。

The global attractivity of the recursive sequenceis investigated, we show that one positive equilibrium point of the equation is a global attractor with a basin that depends on certain conditions posed on the coefficients.

我们首先在第二章讨论了方程的全局吸引性，并证明了方程的一个平衡点在某一和系数有关的区域内是一个全局吸引子。

This paper improves the course attractivity and inspires the student's learning interest, in a word, to increase the teaching efficiency.

该方案旨在增强课程的趣味性，充分调动同学的学习积极性，从而提高课程的教学效率，在实践教学中取得了一定的教学效果。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。