查询词典 unstable equilibrium

The result showed that the strong storm followed by mesoscale squall line was primary cause of strong sandstorm producing, steps and ladders short wave trough of 500 hPa was great criterion triggering system for the mesoscale squall line producing, the essential dynamic condition was provided by distortion field and the mesoscale low pressure of 700 hPa for the strong sandstorm forming and maintaining in mid-west of Hexi Corridor, the deep vertical circulation development condition was basic power that urged squall line to occur and sand dust to curl up, which was provided for the deep convection development by superimposition of lifting movement before ground cold front and ascendant current of secondary circulation in upper air jet entrance region, temperature and the barometric gradient around the cold front was enlarged by enhancement of ground thermal low and temperature diurnalvariation of afternoon, by which essential thermal energy unstable condition was provided for the gale and strong sandstorm eruption, the strong sandstorm appeared in downstream of -200 m^2s^(-2) center of vertical helicity, the vertical helicity had good instruction significance for development of squall line and landing region of sandstorm, the mesoscale squall line occurred in unstable stratification, basic condition of potential energy transforming as kinetic energy was provided by strong unstable stratification for the strong sandstorm forming and developing.

结果表明：中尺度飑线所伴随的强风暴是产生强沙尘暴的主要原因；500 hPa阶梯短波槽是中尺度飑线产生的大尺度触发系统，河西走廊中西部700 hp变形场、中尺度低压为强沙尘暴形成和维持提供了必要的动力条件；地面冷锋前上升运动与高空急流入口区次级环流的上升气流的叠加，为深对流发展提供了深厚的垂直环流发展条件，是促使飑线发生和沙尘卷起的基本动力；地面热低压的加强和午后气温的日变化加大了冷锋前后的温度和气压梯度，为大风、强沙尘暴爆发提供了必要的热力不稳定条件；强沙尘暴出现在垂直螺旋度为－200平方公尺/s^2中心的下游，垂直螺旋度对飑线的发展和沙尘暴的落区具有较好的指示意义；中尺度飑线发生在不稳定层结内，较强的不稳定层结为强沙尘暴形成、发展提供了位能转化为动能的基本条件。

In this paper, we consider neutral functional differential equations and study the global existence of their solutions, stable subspaces and unstable subspaces of linear autonomous dynamical systems, local stable manifolds and local unstable manifolds of near hyperbolic equilibrium point of nonlinear autonomous dynamical systems, periodic solutions and oscillation of the neutral equations.

本文主要研究中立型泛函微分方程解的整体存在性，自治线性动力系统的稳定子空间与不稳定子空间、自治非线性动力系统在双曲平衡点的局部稳定流与局部不稳定流，周期解与解的振动性。

A transient angle unstable mode of power system closely relates to a controlling unstable equilibrium point.

电力系统暂态功角失稳模式同相关不稳定平衡点密切相关。

It was shown that when the production function was constant return to scale, the model became a A-K model; when the production function was increasing return to scale, the equilibrium point was unstable; when the production function was decreasing return to scale, the equilibrium point was a saddle.

结果发现：生产函数为规模收益不变时，模型简化为A-K模型；生产函数为规模收益递增时，均衡点为不稳定结点；生产函数为规模收益递减时，均衡点为鞍点稳定。关键词：数理经济学；经济增长；政府支出；生产效应

In the range ab, the equilibrium is neither stable nor unstable, that is why it is called neutral equilibrium

在ab范围内，这个平衡既不是稳定平衡也不是不稳定平衡，这就是为什么叫做随遇平衡的原因。

The dynamic stability of the shell under axial compression is analyzed qualitatively by the linear equation of motion. There are three kinds of equilibrium state with different value dynamic parameter. They are stable,neutral and unstable equilibrium respectively.

利用线性的运动方程对轴压圆柱壳稳定性进行了定性分析，依动力学参数取值范围的不同，方程的解有稳定平衡、中性平衡和不稳定平衡三种情况，并给出了动力学参数与载荷参数之间的依赖关系。

The results show that in a predator-prey model, when diffusion is absent, the diffusion is the interior impetus of system for its stable equilibrium state transforming to unstable equilibrium state and is the basis for biological mode forming.

研究结果表明：在捕食－食饵模型中，扩散是使无扩散时稳定的平衡态向不稳定的平衡态转变的系统内动力，是生物模式形成的基础。

Sixth, it's pointed out that the equilibrium is unstable in some structural growth models with more specific forms, and business cycles may possibly arise in those models. And it shows that in some cases the invisible hand not only won't lead to an equilibrium, furthermore, will lead to business cycles.

第六，指出在一些形式更为具体的结构增长模型中均衡是不稳定的，且可能出现经济周期，从而说明在一些情况下"看不见的手"不仅不会导致均衡，反而会带来经济周期。

We find the trivial equilibrium is always unstable, which implies that the system is persistent. It is shown that the system is uniformly persistent when positive equilibrium exists.

此外，我们还证明了当正平衡点存在时系统是一致持续生存的，并利用极限系统理论和杜拉克判剧研究了边界平衡点全局稳定性，这表明此时捕食者种群将绝灭。

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。

A major factor in deviation from optimal performance of the activated sludge secondary clarifier is the presence of density currents,resulting from the density difference and temperature difference.

异重流的形成是影响活性污泥系统二沉池水力学性能的主要因素，形成异重流的主要原因包括沉淀池内不均匀的污泥分布和温度分布。

You always nip it in the bud.

你总是有办法解决的。