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In view of a class of nonlinear singular perturbed system which can be typically evolved into two time scales, a Composed control law for trajectory maneuver is researched by applying feedback linearization, in two step, to inner loop and outer loop.

对于一类具有典型双时标特性的非线性奇异摄动系统，应用反馈线性化理论分内环控制和外环控制两步进行了轨道机动的组合控制规律设计。

In the first part of this paper, we give some basic concepts of regular Sturm-Liouville problems and some Sturm-Liouville problems with eigenparameter in the boundary conditions and the definition and properties of the Krein space. Using the Krein space, we describe a class of Sturm-Liouville problems with eigenparameter in two boundary conditions and prove that it can generate a self-adjoint operator in Krein space with only point spectrum.

第一部分我们介绍了一些基本概念如正则Sturm-Liouville问题、边界条件含参数的问题、Krein空间等，并利用Krein空间的定义和性质描述了一类参数边界条件的Sturm-Liouville问题，证明它可构造一Krein空间上的自伴算子，并且谱全为点谱。

Purine: Any of a class of heterocyclic compounds with a two-ring structure composed of carbon and nitrogen atoms.

嘌呤：嘌呤是对由碳、氮原子组成的双环结构的杂环化合物的统称。

Purine: Any of a class of heterocyclic compounds with a two-ring structure composed of carbon and nitrogen atom s.

嘌呤：嘌呤是对由碳、氮原子组成的双环结构的杂环化合物的统称。

Purine: Any of a class of heterocyclic compound s with a two-ring structure composed of carbon and nitrogen atoms.

嘌呤：嘌呤是对由碳、氮原子组成的双环结构的杂环化合物的统称。

Purine: Any of a class of heterocyclic compounds with a two-ring structure compose d of carbon and nitrogen atoms.

嘌呤：嘌呤是对由碳、氮原子组成的双环结构的杂环化合物的统称。

Pyrimidine: Any of a class of heterocyclic compounds with a ring structure of four carbon and two nitrogen atoms .

嘧啶：具有环状结构(由4个碳原子和2个氮原子组成)的一类杂环化合物。

Pyrimidine: Any of a class of heterocyclic compound s with a ring structure of four carbon and two nitrogen atoms.

嘧啶：具有环状结构(由4个碳原子和2个氮原子组成)的一类杂环化合物。

The design method of robust H-infinity output feedback controller with state variance and regional pole constraints is proposed in this paper for a class of time-varying uncertain systems and a quadratic matrix inequality region.

1引言在随机控制问题中，常常要求设计一个控制器使得不同的系统子状态具有确定上界的方差值E。

Based on the method of polynomial pseudo-remainder division, we also give a practical method for determining the conditions of a class of theory-reconstructions in real closed field.

形式系统序列的良极限行为及其应用：本文考虑了计算的两种极限情况，一种是集合论极限，另一种是基于距离的极限。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷