查询词典 perturbation function

Based on the homeomorphous transformation for the model, it can be concluded that if the chaotic attractor for the diagonal is stable for the transverse small perturbation in neighborhood, it should be globally stable in the whole feasible set.

通过对模型的同胚变换可得到：如果对角线上的混沌吸引子在垂直於对角线方向上局部稳定，那麼它在可行集的范围内也全局稳定。

This one-way wave equation fits eikonal equation and transport equation corresponding to full acoustic wave equation in travel-time and first order amplitude. According to the perturbation theory often used in inverse solution, we split the velocity field into intraformational constant velocity background and variable velocity disturbance. Then we calculate time-shift quantity of migration and amplitude correction coefficients for wavefield depth continuation in total uniform formation and each formation.

基于反问题求解中常用的摄动理论，把速度场分裂为层内常速背景和变速扰动，求得整个均匀层波场深度延拓的偏移时移量及振幅校正系数、各层的偏移时移量及振幅校正系数，从而得到一个基于傅里叶有限差分法的双域保幅叠前深度偏移算子方程。

JITENDRA KIKANL%OSWALDO A%PEDROSA JR Perturbation analysis of stress-sensitive reservoirs.[SPE 20053] null , 1991,null

廖新维%王小强%高旺来塔里木深层气藏渗透率应力敏感性研究 10.3321/j.issn：1000-0976.2004.06.028 天然气工业， 2004，06

In order to analyze the dynamic of a turret-moored tan ker, a perturbation method was used to predict the RAO and the spectra of moti on and mooring line tension under the irregular wave condition.

为研究转塔式系泊储油轮的动力响应，应用二阶频域摄动理论计算了其在压载状态下的一阶运动响应、二阶运动的响应谱及锚泊线张力谱，并与相应的模型试验结果进行了比较。

The maximum perturbation accelerations and their percentage contribution in the sum of all accelerations due to the lunisolar perturbations,Earth tides,ocean tides,atmospheric tides,pole tides,relativity effects,atmospheric drag and solar radiation pressure are computed on the basis of simulated orbit.

结果表明：①在1.0ⅹ10-9m/s2的非保守力测量精度内，除大气潮可忽略外，其余摄动必须考虑；②考虑GOCE预期定轨精度(3 cm)，在弧长小于2.0 h的短弧定轨中，固体极潮和大气潮的影响可忽略，在长弧定轨中，忽略任何一种保守力的轨道预报时间均不足0.5 d；③各种潮汐对重力梯度观测值的影响量级均小于GOCE预期的测量精度(3 mE)。

Intramuscular and surface electrodes recorded the electromyographic activity of the short and long fibres of the lumbar multifidus and the shoulder muscle, deltoid, during a postural perturbation associated with a rapid arm movement.

在与快速臂部运动相关的姿势干扰期间，以肌内和表面电极记录腰部多裂肌和肩部肌肉长、短纤维的肌电灵敏度图。

It not only avoids the sensitivity to the model perturbation and the noncausality in the decoupling procedure of time-delay systems, but also is easily understood and accepted by the application engineers with its clear physical concept. Thus, it is a promising control approach to wide applications.

该方法不但克服了传统的精确解耦方法对模型摄动的敏感性及时滞系统在解耦过程中的非因果性问题，而且物理概念清楚，易于为现场工程师理解和接受，是一种具有广泛应用前景的控制方法。

Three kinds of perturbation methods for nondegenerate quantum system are briefly introduced and compared applying to a simple model.

简要介绍了量子力学中三种定态微扰方法：一是通常的Rayleigh -Schr¨odinger微扰，但其缺点是高阶微扰项的表达式很繁，且无一般的通项公式。

The algorithm is based on the tensor expression of the second-order nondegenerate perturbation formulae of Bloch wave method of many-beam dynamically diffraction theory.

这些数据以被收录到新版《X-射线国际晶体学表》的C卷中。完善了高能电子衍射的非简并微扰理论的张量表述。

With conditions of approximately actual beckground wind field in typhoons and a barotropic nondivergent model in a cylindlical coodinate, the Problem of instability of the Perturbation in tyPhoons is discussed.

在与实际台风风场近似一致的环境流场条件下，应用柱坐标中的正压无辐散模式，讨论了台风中扰动的稳定性问题。

We have something to do in the new stage.

在这段崭新的时期中，我们有一些要做的。

The difference between tourism decision-making under uncertainty and risky tourism decision-making is indistinctive.

其中不确定性旅游决策和风险旅游决策的界线比较模糊，两者的区分是相对的。