混沌的

The chaotic planar attitude motion of a ligid spacecraft on an elliptic orbit in the gravitational field with air drag and internal damping and its control are studied. The necessary condition of occurring chaos is established by Melnikov's method. A numerical example is presented.

研究了同时存在大气阻力和结构内阻尼的椭圆轨道上平面天平动航天器的混沌姿态运动及其控制，应用〓方法给出了出现混沌的必要条件，用数值算例进行了验证。

Based on utilizing the unified chaotic model to obtain initial points of Newton iteration method, a new method for solving sets of nonlinear equations is proposed.

以统一混沌模型产生牛顿迭代的初始点，提出了基于统一混沌的牛顿迭代法求解非线性方程组的新方法。

Natality, mortality and population Predator behavior and prey growth (H2) response J2

混沌 数学上有关混沌的定义与俗语中的用法是截然不同的。

In the last two decades, researches of chaos was mainly concentrated in quantification from experiments and numerical simulations.

在过去的20多年时间里，人们对混沌的研究主要是从一些实验及数值系统观察和量化混沌行为。

The study of transitions from ordered spiral pattern to spiral turbulence is a point of break through in this field.

研究从有序螺旋波态到螺旋波时空混沌态的转化是研究时空混沌的性质的一个突破口。

Melnikov method is employed to study the bifurcations and chaos of homoclinic and subharmonic orbits for two pendulum systems.

用Melnikov方法研究具有弱阻尼与参数激励的单摆以及倒摆运动的同宿轨道分岔、次谐分岔和混沌现象，得到了发生同宿轨道分岔、次谐分岔和混沌的临界参数，并将所得理论结果与倒摆运动的实验结果进行了比较与讨论。

A general method for signal coding based on symbolic sequences and the relationship between the variable and its symbolic sequence are presented.

理论分析、数字仿真及试验结果表明，混沌在测量领域中的应用具有很大的潜力，为混沌的工程应用开辟了新的方向。

Based on the amount of available input information and the state of art of the geophysical signal processing, the new methods are prac tical and hopeful for serving industrial applications.

本文还用混沌理论对激励源的运动进行数值分析，通过相平面图和Poincare图分析发现，在某些激励条件下，激励源的运动形式可能是混沌的。

Our results show that this system has five equilibria, therefore is not topologically equivalent to the Lorenz, Rsslor or ...

结果表明，该系统具有五个平衡点，因而与Lorenz，Rsslor，Chen、L櫣等混沌系统是非拓扑等价的；当其参数满足一定条件时，系统是混沌的。

Black is the uncivilised dark chaos, whilst white the vent through which Pangu severed the chaos, black-and-white is Yin and Yang, the Earth and the Sky, and everything. In actual fact black-and-white serves as both sides of a contradiction.

黑是未开化的漆黑混沌，白是盘古开凿混沌的气孔，黑白是阴阳，黑白是天地，黑白是虚实等等，其实黑白就是矛盾对立的两个方面。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。