平衡点

A new method based on adjoint system and minus system to compute unstable equilibrium points on the stability boundary of power system classical model is proposed.

提出一种基于伴随系统和变号系统的求解电力系统经典模型稳定边界上不稳定平衡点的方法。

These adjoint gradient systems share the same potential energy function and equilibrium points.

这些梯度系统共享一个势能函数和相同的平衡点。

The item set up and put into production then can become annual 100 ten thousand sets intelligence digital gas meter and network management system, can realize sale income 38000 ten thousand yuan, annual sale tax and affixture 1687.8 ten thousand yuan, annual profits total amount 3412.83 ten thousand yuan, ratio of investment profit 43.08% ratio of investment be nefit tax 64.81%; internal rate of return of finance 43.11% investment recovery period 3.54 years, profit and loss equilibrium point 37%, the item has good profit ability and pay off ability, and has the ability of certain anti-risk.

本项目建成投产后可形成年产100万台智能数字燃气仪表及网络管理系统，可实现销售收入38000万元，年销售税金及附加1687.80万元，年利润总额3412.83万元，投资利润率43.08%，投资利税率64.81%，财务内部收益率43.11%，投资回收期3.54年，盈亏平衡点37%，项目具有良好的盈利能力和清偿能力，并具有一定的抗风险能力。

The paper is devoted to the quartic invariant algebraic curves in quadratic system.

本文在给定参数满足一定的条件下，研究了一类二次系统的四次不变代数曲线系统平衡点的稳定性态，并运用Dulac函数法给出了该系统不存在极限环的充分条件，这一研究在同类问题中具有一定的拓展性。

How to strike a balance between literal and free translation, that is, to avoid translationese on the one hand and keep some alienness on the other, has been the focus of debate among translators in China.

如何在直译与意译之间找到一个平衡点，即在防止翻译腔的出现的同时又要能恰当地吸收英语中有益的成分来丰富和发展汉语，一直是中国翻译家所追求的。

According to the change of the enemy\'s quantity and the qualitative theory of the differential equation, we research the spruce aphides and its predator system. At the same time, we discussion the spruce aphid multiplication model when the natural enemy quantity is a certain value and the periodic oscillating model whose the quantity of the natural enemy changes along with the time. Obtains the stability condition of the balance point and the limit-cycle existing condition, the system presents the dissipative structure\'s character. Finally it explains that this theoretical analysis has certain practical significance regarding the preventing and controlling harmful insect.

第五章，松毛虫与其天敌的关系是食饵和捕食者的关系，根据天敌数量的变化，利用微分方程定性理论，研究松毛虫与天敌系统，讨论天敌数量为一定时的松毛虫增殖模型和天敌数量随时间变化的周期振荡模型，得到正平衡点全局稳定性和极限环的存在条件，通过计算机模拟，说明周期振荡的捕食模型能够呈现典型的时间耗散结构特征，对于防治害虫有一定的实际意义。

A new method to analyze the global asymptotic stability of the equilibrium point of nonlinear circuit is introduced.

冯平提出了一种新的分析具有分解形式的高维非线性电路平衡点全局渐近稳定的方法。

Based on strongly structure turbulence theory, a new method to analyze the global asymptotic stability of the equilibrium point of nonlinear circuit is advanced.

提出一种新的分析非线性电路平衡点全局渐近稳定的方法。

By the method in this paper, for deciding the global asymptotic stability of the equilibrium point, it is not necessary to verify whether the equilibrium point is unique and to construct Liyapunov functions.

由于非线性电路的复杂性，目前适合于该问题的方法，主要是LIYAPUNOV直接[13] 。应用LIYAPUNOV直接法分析电路的平衡点全局渐进稳定性，有两个基本的问题难以解决。

This improved variable structure discrete approach law can make state point reach equilibrium point directly and avoid the vibration around the equilibrium point.

对离散滑模变结构控制的趋近律进行改进，可以使状态点到达平衡点，使其避免了系统状态点在平衡点附近的抖振。

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％。