查询词典 unstable equilibrium

Three control laws that are derived based on three Lyapunov functions are applied successively to achieve a suitable posture and increase the energy so as to stabilize the acrobot at an unstable inverted equilibrium position.

基于三个 Lyapunov 函数分别设计了三种控制规律，用来增加 Acrobot 的能量和保持合适的姿态，使 Acrobot 摇起并稳定在垂直向上的不稳定平衡点。

Through such a study, it is also shown that when the time delay is long enough such that the stability switches of the equilibrium of system halt, the bifurcation branches originated from the critical time delays cannot be surely stable or unstable in the whole solution space, that is, their stability depends on cases.

利用打靶法的数值结果说明了当系统平衡点不再发生稳定性切换时，源自这些临界时滞处的解支的稳定性在整个解空间的稳定性具有不可判定性，这也说明由多尺度法所得高阶近似判定的解支的稳定性事实上只表示解支在局部中心流形上的稳定性，而非在整个解空间中的稳定性。

By combining mathematical analysis with numerical simulation, we have shown that the Allee effect may be a destabilizing force in predator-prey systems: the equilibrium point of the system could be changed from stable to unstable or otherwise, the system, even when it is stable, will take much longer time to reach the stable state.

由于捕食者或猎物Allee效应的存在，系统的平衡点要么由渐进稳定变为中性稳定或不稳定，要么系统需要更长的时间才能到达平衡状态。

In the design of the system, one method of intelligent control is used which combines the Programmable Logical Controller and the Sensor, uses the shaft-type sensor to gather vehicles pulse and the high speed counter of the PLC to count the number of the pulse, uses certain principles of intelligent control to adjust the length of traffic lights automatically according to the data obtained, reduces the phenomenon of the vehicles stranded in a large scale, solves the problems of not equilibrium and unstable traffic flow magnitude well.

在系统的设计中，主要使用了PLC可编程序控制器和传感器相结合的一种智能控制方法，使用压轴式传感器采集车辆脉冲，用PLC高速计数器时脉冲进行计数，根据取得的数据运用一定的智能控制原则自动调节红绿灯的时间长度，最大限度地减少车辆滞留现象，较好地解决了车流量不均衡、不稳定问题。

In Chapter 3,the properties of equilibrium points are discussed and stablesubspaces and unstable subspaces are given for linear dynamical systems.

第三章 首先讨论线性动力系统在平衡点的性质，给出线性动力系统的稳定子空间与不稳定空间。

In Chapter 3, the properties of equilibrium points are discussed and stable subspaces and unstable subspaces are given for linear dynamical systems.

第三章 首先讨论线性动力系统在平衡点的性质，给出线性动力系统的稳定子空间与不稳定空间。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。