查询词典 uncertain

Many people are uncertain about how to address members of the nobility .

许多人不知道怎样称呼贵族家的人。

Second, the description problem of uncertain nonlinear systems is developed.

其次，本文研究了非线性系统不确定性的描述问题。

Linear memoryless state-feedback control law is derived for two classes of uncertain nonlinear interconnection systems with sector restriction or norm-bounded restriction based on Linear Matrix Inequality. This method doesn't require that two input terms are absolutely controllable for nonlinear delay systems.

基于线性矩阵不等式分别导出了具有扇形角约束和范数有界约束的两类非线性关联不确定系统的线性无记忆状态反馈控制律设计方法，该方法不要求系统的两输入项对系统完全可控。

Up to now, intelligent control has been applied widely in the uncertain and nonlinear system.

智能控制技术是当前控制领域研究的热点之一，广泛应用于不确定性、非线性等复杂系统的控制中。

Dynamic response of the MDOF nonlinear vibration system with uncertain parameters is studied.

研究多自由度非线性不确定参数系统的动力响应问题。

The sufficient conditions to guarantee robust exponential stability for the closed-loop systems are obtained based on Linear Matrix Inequality, moreover, the approach of design of robust H# output feedback controller is introduced.3 The problem of reliable H# control for a class of Lur"e systems with polytopic uncertainties is studied when all control components are operational as well as when some control components experience failures, the design approach of reliable H# controller is also obtained.4 Considering a class of uncertain Lur"e singular system with time-delays, the problem of robust stability is investigated based on Barbalats Lemma and nonsingular linear transformation of model reduction.

针对一类不确定Lur'e奇异时滞系统，基于Barbalat引理以及非奇异降阶变换，讨论了Lur'e奇异时滞系统的鲁棒稳定问题，提出了鲁棒H_∞状态浙江大学博士学位论文反馈控制器的设计方法。5、针对一类具有饱和执行器的不确定Lur'e奇异系统，提出了时滞依赖的鲁棒稳定与鲁棒二次镇定的充分条件，所的结果不需要参数的整定。6、针对任意协方差有界的有色噪声，讨论了一类不确定Lur'e奇异系统的鲁棒凡滤波问题，得出了鲁棒几滤波器设计的充分条件。7、针对一类不确定Lur'e时滞系统，通过线性变换，把它转换成奇异系统，根据奇异系统鲁棒控制理论所得出的鲁棒稳定与鲁棒镇定控制器设计的充分条件具有很小的保守性。

Based on it , in the circumstances of nonwhite and uncertain noise model , a method of add itional array component is proposed to estimate azimuth angles of sources in unk nown noise environment using MUSIC .

对不少实际环境中的噪声模型是非白和不确定的情况下，提出一种辅助阵元的方法，以确定

So, during the period of transformation acceleration, our focus on the change of the economic growth structure, the division of the scientific and technological resources factors and the complication of systematic environment of scientific and technological resources, our seeking for the macro-environment and realistic strong point of the scientific and technological development, our exploration of the intension of scientific and technological resource and the way of rational allocation, promotion of the scientific and technological progress and innovation in an all-round way, upgrade of the contributing power of science and technology to economic development, are very significant to dispel the uncertain factors of society transformation period effectively, form new norm of society reconstruction and ensure the steady transformation of society.

因此，在加速转型期，关注经济增长结构的变化，科技资源要素的分化以及科技资源系统环境的复杂化，寻求科技发展的宏观环境和现实支撑点，探索科技资源内涵及合理配置方式，全面促进科技进步与创新，提高科技对经济发展的贡献力，对于有效消除社会转型期的不确定因素，形成新的社会整合规范，保障社会的平稳过渡具有重要的意义。

In normotensive volunteers group, 4 (25%) of 16 cases showed neurovascular comprssion, 2 cases (13%) showed contact, and 3 cases (19%) showed uncertain contact.

2在正常人组中MR显示神经血管关系中有4例为神经血管压迫、2例为接触、3例可疑接触。

In this paper , the author chiefly adopt the method of interval number linear programming to study the portfolio selection problem under uncertain states .

本文的第一章作者首先介绍了证券组合投资的基本概念；其次综述了证券组合投资的研究概况；最后总结了本文研究的主要内容及其重要意义。

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％。