平衡点

For the model with exponent input, the endemic equilibrium is locally asymptotically stable when the period of latency is small enough; the endemic equilibrium is unstable when the period of latency is large enough.

对于带有指数输入的情形，发现地方病平衡点当潜伏期充分小时是局部渐近稳定的，当潜伏期充分大时是不稳定的。

The calculation of controlling unstable equilibrium point of a post fault power system is transformed to nonlinear least squares issue. The Jacobi matrix, Hessian matrix and the residue formula are derived. It is found that the residue is changed in the calculating process, so it is appropriate to use the switch method to solve the problem.

将计算电力系统故障后的主导不稳定平衡点的问题转化为最小二乘问题，推导了计算所需要的雅可比矩阵、海山阵以及计算过程的残量公式，发现残量随著计算过程而变化，因此该问题适合于采用开关算法。

When the parameters are unknown, based on the Lyapunov theory, corresponding controller and the adaptive law of parameters are designed to suppress chaos to any unstable equilibrium by the adaptive control strategy. The asymptotical stability of chaos control is guaranteed in theory by lemma of Barbalat.

当该混沌系统的参数未知时，基于Lyapunov稳定性理论，利用自适应控制策略，设计了相应的非线性控制器和参数自适应律将混沌系统的轨道控制到其任意一个平衡点，并借助Barbalat引理，从理论上证明保证了混沌控制的渐近稳定性。

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。

To calculate your breakeven point, you will need to identify yourfixed and variable costs.

要计算出你的收支平衡点，你首先需要弄清楚你的固定及临时开销。

Optimal control of antagonistic muscle stiffness during voluntary movements, Biol Cybern, 1994,71:123～135

此时关节保持平衡点不动，关节总力矩为0，但有一定的刚度。

The organization of heterogenic reflexes among muscles crossing the ankle joint in the decerebrate cat, J Physiol, 1989,410:463～477［6］ Lan N, Crago PE. Optimal control of antagonistic muscle stiffness during voluntary movements, Biol Cybern, 1994,71:123～135

从仿真结果可以看出，对于闭环α-γ平衡点控制模型，在给定自反射、互抑制、闰绍细胞回路增益和γ运动神经元激励条件下，系统终能达到一个稳定的输出。

Nichols TR. The organization of heterogenic reflexes among muscles crossing the ankle joint in the decerebrate cat, J Physiol, 1989,410:463～477［6］ Lan N, Crago PE. Optimal control of antagonistic muscle stiffness during voluntary movements, Biol Cybern, 1994,71:123～135

从仿真结果可以近视看出，对于闭环α-γ平衡点控制模型，在给定自反射、互抑制、闰绍治愈细胞回路增益和γ运动丰满传染病神经元激励条件下，系统终能达到一个稳定的输出。

An analysis is made of the existence, uniqueness and globally asymptotical stability of the equilibrium point of Hopfield neural networks.

研究一类Hopfield型神经网络的平衡点的存在性、唯一性和全局稳定性。

The floristic equilibrium point and its biogeographic significance are important for understanding the floristic origin, distribution, and spatial patterns of plant diversity.

了解植物区系平衡点及其生物地理意义对于理解植物区系的起源、分化以及生物多样性空间格局的形成等方面均具有重要意义。

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％。