扰动

This article sets up a state equation of reactor power control, making- use of the differential geometry theory of modern cybernetics, and applying this theory to deal with the non-linear neuclear dynamics model .

本文建立了反应堆功率调节系统的状态方程，运用现代控制理论中微分几何理论对非线性核动力学模型进行线性化处理，根据观察器理论，构造了状态变量C的观察器，研究了在反应堆功率和反应性两种扰动下反应堆全反馈功率调节系统的品质。

The existence of multiple periodic solutions of the equations is gotten by using convex Hamiltonian theory and Morse index theory.

讨论了一类扰动时滞微分方程的多重周期解的存在性问题，运用凸Hamilton系统理论和Morse指标理论得到了这类方程多重周期解的存在性。

In the third chapter, we study the existence, uniqueness, global stability of positive solution and MLEs of parameters of Lotka-Volterra competition system, mutualism system and predator-prey system with random perturbation.

第三章研究了具有随机扰动的Lotka-Volterra型的竞争系统，互惠系统和捕食-被捕食系统正解的的存在性，唯一性，全局渐近稳定性以及参数的极大似然估计。

In consideration of gravity disturbance the kinetic equations of Be'nard problem are solved by means of normal mode analysis.

考虑到重力扰动借助简正模分析对贝纳德问题的动力学进行求解。

Finally, the combination of adaptive control and proportional control are applied to develop the control algorithm in DSP to suppress the disturbance and natural frequency oscillation simultaneously, and the efficiency is verified experimentally.

最后，本文结合适应性控制和比例控制演算法於DSP内，进行同时抑制平板上的扰动量和自然频率共振的实验研究，结果证实此控制方法有很好的效果。

The temporal change in floes size of fine suspended sediments was measured in Xuliujin of the Changjiang Estuary in June of 2003, by using an in situ laser diffraction particle sizer, the laser in situ scattering and transmissomerty-100(LISST-100). The spectrum analysis was applied to analyze the fluctuation of floes diameter during the spring tide and the neap tide.

2003年6月利用现场激光粒度仪(LISST-100)在不扰动的情况下，获取了长江口徐六泾处悬浮细颗粒泥沙絮凝体的现场粒径系列资料，应用谱分析方法研究了絮凝体粒径在大小潮、表底层的变化规律。

In order to keep variations negligibly small , only small perturbations will be considered.

为了使变分小到可以忽略的程度，仅考虑微小的扰动。

The proposed method can simplify the structure of the system and eliminate the chattering phenomenon.Moreover,the convergence neighborhood of the system states can be estimated according to the parameters of the controller and the range of the mismatched uncertainties.

所提方法可以简化系统结构，消除控制抖振，通过控制器参数和非匹配扰动的上界可以估计系统状态的收敛范围。

It is especially important to research and analyze the running state of the power net and the function under the situation of all kinds of disturbance and breakdown.

随着蒙西电网的不断发展，电网结构日趋复杂，研究和分析电网的运行状况及在各种扰动和故障条件下的性能显得尤为重要。

A new portable instrument for measuring natural neutron flux has described.

论述了地－空界面天然中子辐射场的扰动。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。