研究表明，不稳定内部动态有界解的存在性是非最小相位系统能够稳定跟踪期望输出轨迹的关键。
The existence of the bounded solution of unstable internal dynamics is the key to tracking reference trajectory stably.
本文在无限大均质地层弹性不稳定渗流模型解析解的基础上，建立了与地层耦合的水平井筒压降模型。
A pressure drop model in horizontal well was established on the basis of the analytical solution of an elastic and unsteady seepage flow model in infinite reservoir.
稳定电路或不稳定电路可用电路变量相对于平衡解的初期量变趋势来解释，而由反馈增益加以判断。
A stable or unstable circuit can be explained with the tendency of initial variation of circuit variables relative to the equilibrium solution, and can be discriminated on the feedback gain.
二级近似时其解为孤立波形式——不稳定时，在地形不同位置可形成东移或西移的孤立波槽或孤立波脊；而在稳定时只形成孤立波槽。
Under second order approximation both troughs and ridges of unstable isolated waves are formed in different locations, and for stable isolated waves only troughs are formed.
方程是一病态积分方程其解很不稳定。
This equation is ill-posed and its solutions are extremely unstable.
主要运用能量方法及稳定集和不稳定集的观点，研究一类半线性抛物方程的整体解和局部解的存在性及爆破问题。
In this paper, we are concerned with the existence of global solutions or local solutions and blowup of one kind of semilinear heat equation.
这个结果导致捕食食饵系统的持久性、平凡解和所有半平凡解的不稳定性和不存在非一致平衡解。
The result leads to the permanence of the prey-predator systems, the instability of the trivial and all forms of semitrivial solutions, and the nonexistence of nonuniform steady-state solutions.
此改进算法使用多初始解和全局禁忌表，它能够减小解的不稳定性和扩大搜索范围。与标准禁忌算法比较，它的全局搜索能力和稳定性都大大增强。
In this paper, a multi-initial-solution and global tabu table is used in the algorithm to increase the stability and enlarge the search scopes.
给出了具有抛物形电导率分布的电弧螺旋不稳定性的一个简化线性分析，得到了显式解析解。
A simplified linear analysis of the helical instability of arc plasmas is given. Explicit analytic results are obtained.
结果表明：如果增益大于激光腔损耗，则零解是不稳定的；
The result shows that if the gain is larger than the cavity loss, the zero solution is unstable;
结果表明：如果增益大于激光腔损耗，则零解是不稳定的；
The result shows that if the gain is larger than the cavity loss, the zero solution is unstable;
应用推荐