模态的

The model was solved by the Ritz method, and the orthogonal polynomials generated by the Gram-Schmidt process were employed as admissible function for both disk and blades. With this approach, the matrix derived from kinetic energies becomes diagonal and numerical manipulation can become easy and stable.

采用Gram-Schmidt方法生成正交多项式作为李兹容许函数进行模型的离散化，简化了所得到的频率方程求解过程，有利於求解过程的数值稳定性，并可方便地通过对方程系数性质的分析了解结构振动模态的性质。

By using the sliding mode approach and a multi-step control strategy, a new controller is presented, which can not only satisfy the control constraints but also stabilize the system to an arbitrarily small ε-neighborhood about its equilibrium in a finite time.

利用滑动模态的思想和多步控制策略，设计了不连续反馈镇定律，该镇定律一方面满足控制受限条件，另一方面使得闭环系统的状态收敛到预先给定的原点的任意小的ε邻域中。

The models have been applied to an investigation on the chatter in a type Mx-4 lathe. An in-depth study has been made on the AR spectrum, the chatter modal damping ratio and the characteristic root of a time-varying system.

文中对时变金属切削过程颤振的AR谱特性、颤振模态的阻尼率、时变系统的特征根这三个方面都进行了深入的研究，指出了时变金属切削过程颤振的特点，提出了颤振状态下的机床切削系统仍然是稳定系统的观点。

The relations between quality factor and the periods of air holes around the defect and the thickness of slab are demonstrated.Then, the positions and shapes of nearest holes are adjusted to excite more defect modes, and the relation between defect modes and modified cavity in defect region are discussed. Moreover, the mechanism of light confinement in vertical and plane direction is discussed, and how they effect the quality factor can be induced.

先探讨结构周期数和厚度对品质因子的影响，接著修正缺陷空腔附近空气柱大小和位置，分析其与激发模态的关系，及相应品质因子的大小，此外分别讨论垂直方向和平面方向的光局限机制与影响品质因子的程度。

It is also the base of structure optimization.According to main object characteristics of structural dynamics design,structuraleigenveetor sensitivity computation is,first,be studied.A Neumann series expansionmethod is proposed in accordance with the modal method and is developed to agreewith the structure with rigid body modes.A rapid Neumann series expansion methodfor eigenvector sensitivity is formed;it may greatly improve the efficiency ofcomputing eigenvector derivation.

本文根据结构动力学设计的主要目标特性，首先进行了结构特征向量灵敏度分析研究：形成了计算特征向量灵敏度的Neumann级数展开法，并将其扩展到适用于具有刚体模态的结构特征向量灵敏度分析；研究出计算特征向量灵敏度的快速Neumann级数展开法，该方法大大提高了特征向量灵敏度分析的效率；建立了无需K-1运算的结构特征向量灵敏度分析的共轭梯度迭代法。

The free vibration of a nonlinear elastic rectangular plate is explored, considering influence of material nonlinearity and static-load in plane on its dynamic characteristics. Exact solution to free vibration of each mode of the rectangular plate is obtained according to the fixed point theory of partially ordered space. So the whole process of free vibration is described.

对非线性弹性矩形板的自由振动进行了研究，考虑了材料非线性和面内静载对板动力特性的影响，并根据半序空间的不动点理论求得该矩形板在自由振动时各阶模态的精确解，描绘了其自由振动的全过程。

Finally the damping control strategy of SVC and TCSC are proposed. In the second part, Prony analysis is used to identify the transfer function and residue of the system, and FACTS damping controller is designed by compensating the phase of residue. A method of choosing input signal of damping controller is proposed.

在应用Prony方法对电力系统仿真信号进行分析的过程中，选取特定形式的小扰动作为输入信号，根据对应的输入、输出信号中包含的模态的关系，推导出系统的传递函数。

The design method for the switching functional which leads to stable sliding modes is presented if the system is spectrally controllable.

摘要研究一类状态变量具有时滞的线性系统的变结构控制问题，指出传统的切换函数在时滞系统中应当是一个切换泛函，给出了在系统谱能控条件下具有稳定滑动模态的切换泛函的设计方法。

Based on the analysis for the lighter effect of substituting fixed interfacial modes with elastically constrained interfacial modes on results, the synthesis techniques using two typical substructural measured modes will be carried out easily due to its modes.

文中还进一步说明，用简化的弹性界面主模态代替固定界面约束主模态，对综合结果影响较少。这样，自由界面主模态和简化弹性约束主模态都很容易从模态试验中提取，因而子结构两类试验模态综合技术很容易实施。

A histogram showing the frequency of genome sizes for these 2802 species reveals a strongly skewed distribution with a very small modal size of 0-7 pg ( 675 Mbp), well within the bottom I % of the ange.

直方图显示频率的基因组大小为这些为2802种，揭示了强烈的分配倾斜与一个很小的模态的大小0-7编号（ 675人的MBP ），以及内部的底部i ％的昂热。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。