不确定性

The Moon's actual radius varies as a function of position angle and libration because of the irregularity in the limb profile.

月球实际半径根据其位置角度函数和缓慢摆动而变化，由于其边缘轮廓的不确定性。

However, since the life annuity is a long-term economic action, the factors of government policy and economic cycles may cause interest rate to be uncertain during the period of insurance. So the study on the theory of life annuities under random rates of interest has gradually become one of the heated and major problems of actuarial science.

但由于生存年金是一种长期的经济行为，投保期间的政府政策、经济周期等因素都会造成利率的不确定性，从而随机利率下生存年金理论的研究逐渐成为保险精算学研究的重点与热点问题之一。

It has, however, the wrong title:"Uncertainty" is but a single part of quantum mechanics and Mr Lindley covers far more ground, taking readers through a history of atomic and nuclear physics.

但标题却失之谬误："不确定性"仅仅是量子力学的一部分，而 Lindley 先生却以偏概全，带领读者回顾了一段原子及核物理史。

This paper proposes an oppositional opinion to a popularly acceptedissue in GIS community about error-band of line element position uncertainty.

对当前GIS界流行的以点位误差描述线元位置不确定性的误差带理论提出相反的观点。

The deviation of forecasting brought by the difference of CCP schemes would not increase lineally with integration forward.

结果表明，模式非绝热物理过程可以从两方面影响暴雨预报的不确定性。

Linear and nonlinear uncertainties are handled by a unified linear fractional transformation model with Popov multipliers.

用带有Popov乘子的线性分式变换模型对线性和非线性不确定性进行了统一处理。

The Linear Fractional Transformation representation of the uncertain aeroelastic system is formulated to perform model validation and robust flutter analysis.

分别使用基于Carathe-dory- Fejer插值定理和Nevanlinna-Pick插值定理的模型集检验方法进行了模型确认，在时间域和频率域中对模型集的有效性进行了验证，确定了不确定性的幅值。

The linear fractional transformation representation of an uncertain aeroelastic system is formulated to perform model validation and robust flutter analysis.

建立不确定气动弹性系统的线性分式变换模型，给出了频域的模型有效性检验方法，对有效模型集进行参数化并将不确定性幅值最小的模型集求解归结为优化问题。

The problem of model validation/invalidation pertaining to a linear fractional transformation structured uncertainty model is studied. Model validation using simultaneously time and frequency domain data is considered here.

以往的模型验证问题分别在时域和频域内独立进行研究［1～4］，文献［5］基于系统非结构不确定性的线性分式变换模型，提出了同时利用时域和频域数据对模型进行验证的混合途径。

Using this method, the controller design for performance and robustness can be designed separately, which has the potential to overcome the conflict between performance and robustness in the traditional feedback framework. Third, to make the vehicle meet the performance index in full flight envelop, a H∞ gain-scheduled controller based on Linear Varying Parameter system are designed. A LPV plant with a linear fractional dependent variable can be represented by upper LFT (Linear Fractional Transformation) interconnection.

通过把非线性系统简化为了线性变参数系统，再有通过线性分式变换将LPV系统转化为一个线性定常系统和不确定性组成的LFT互联形式，使之转换成为一个经典鲁棒控制问题，然后通过求解一组线性矩阵不等式得到变增益H_∞控制器。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。