线性的

2 To the general case of the higher order linear discrete-time systems with the unknown control directions and model parameters.

将文献[1，2]的研究结果推广到具有未知控制方向和模型参数的高阶线性离散时间系统，研究一般线性系统的间接自适应调节。

Then linear control technique is applied to the linear subsystem of the transformed equivalent systems to design the controller, thus a nonlinear controller of the original chaotic systems is obtained, which is proved to be exponentially stable.

然后利用线性控制方法对变换后的等价系统中的线性子系统进行了控制器设计，由此设计出原混沌系统的非线性控制器，并证明其具有指数稳定性。

By using methods of passivity and switching control of states of the linear subsystem, both stabilization of the linear subsystem and invariance of the specified region in state space can be guaranteed simultaneously. Hence, a sufficient condition for the robust invariance switching control of this class of systems was derived.

通过基于鲁棒严格无源技术和线性子系统状态反馈的切换控制来镇定线性子系统，同时保证了指定区域的正不变性，从而得到了该类系统鲁棒不变切换控制的充分条件。

This method uses periodic sequences of different magnitudes as inputs to extract a linear subsystem so that the set theory, parameter estimation, optimization, pole zero separation, can be applied.

该方法巧妙利用不同幅值的伪随机输入信号，从原系统中离析出线性子系统。基于线性子系统的参数估计值和集合理论，提出一个零极点划分的寻优准则。

About linear algebra and matrix of history, the understanding of linear algebra and matrix of people, there is a certain reference value.

讲述线性代数与矩阵的历史，对了解线性代数和矩阵的人来说，有一定的参考意义。

It uses t-Test and Granger Causality Test to solve the problems of multicollinearity and spurious regression, so the whole model is convictive.

3实证分析部分采用岭回归和Granger因果关系检验的计量方法，有效地克服了时间序列多元线性回归模型中经常出现的多重共线性和伪回归现象，模型整体具有较强的说服力。

The test curve of side skin friction resistance of pile is simplified linearly. The distribution of skin friction resistance is controlled by two factors: the maximum value of negative skin friction resistance and depth ratio of neutral plane. Thus, the simplified linear calculation model of rigid pile composite ground is established.

作者还根据桩体侧摩阻力的试验曲线，进行线性简化，由桩顶的负摩阻力最大值及中性面深度比控制全桩长的侧摩阻力分布计算，从而，建立了刚性桩复合地基桩体侧摩阻力线性简化计算模型。

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。

Considerable work and progress have been made over the past decades on nonsingular linear systems and linear least squares problems.

最近几年，一批研究工作者在非奇异线性方程组和线性最小二乘问题的条件数方面做了大量的工作，并取得了显著的进展。

For the characteristic of the ring permanent magnet torque motor used in direct drive numerical control round table suffering from the effect of load disturbances and parameters variations, a multi-objective mixed H2/H∞ static output feedback controller, which makes all poles of the closed-loop system be located within a prescribed linear matrix inequality region D to achieve pole placement, is designed based on LMI.

针对直接驱动数控转台用环形永磁力矩电机易受负载扰动及自身参数变化影响的特点，文中基于线性矩阵不等式(linear matrix inequality， LMI)，设计了一个多目标混合H2/H￥静态输出反馈控制器，该控制器可使闭环系统的极点均落在预先选定的线性矩阵不等式区域D内来实现极点配置。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。