有方法的

In the second place... and technology. The maintenance of the traditional technology and methods is futile.

尽管现代科学技术已经证明了这些方法是愚昧的，然而在许多偏僻的地方，仍有成千上万的人们在使用这些方法。

According to the studied results at present, the studied objects are mainly thin plate and beam about sound radiation mode, a method computed sound radiation mode of complex structure is presented in this dissertation, according to the results of the previous two chapter, a theoretical method to solve acoustical radiation mode and acoustical radiation efficiency of complex structure by boundary element method and acoustical radiation theory is posed, the acoustical radiation power is expressed as a Hermitian quadratic form, while the radiation modes is determined by general eigenvalue decomposing, and then the radiation efficiency is computed via the orthodoxy of radiation modes with regard to impedance matrix and average velocity matrix; lastly, the validity of the method is proved by pulsating sphere and radiating cube with analytical results. According to results of the form three chapter, the structure sound radiation sensitivity is studied in detail, the sound radiation power of structure can be expressed as positive Hermitian quadratic form, the sound radiation sensitivity can be expressed as two parts by partial differential with respect to design variable, which are sensitivity of boundary velocity and impedance matrix, combined with the theory of FEM and BEM, the structure sound radiation can be translated to the analysis of structure dynamic sensitivity and impedance matrix sensitivity. The theory posted in this dissertation is tested by the FEM software ANSYS and the software AAS programmed by author.

在前几章的基础上，通过结构声辐射的模态理论对结构的声辐射的机理进行了深入地探讨，针对目前声辐射模态的研究对象主要是简单的板和梁类结构，提出了一种计算复杂结构声辐射模态的方法，利用前两章研究所得的结论，将边界元方法与广义特征值的理论结合起来研究了复杂结构的声辐射模态与声辐射效率，先将结构的声辐射功率表示为一个正定的厄米特二(来源：ABb7C论文0909网www.abclunwen.com)次型，运用广义特征值分解求解了复杂结构的声辐射模态，然后利用声辐射模态关于阻抗矩阵与均方速度耦合矩阵的正交性，求解了复杂结构的声辐射效率，最后用具有解析解的脉动球与辐射立方体验证了该方法的有效性。

In practice,there are a variety of methods to discover the law,some of which are hoary,some are modern,some are simple and some are complex.

在实际进行法律发现的各种方法中，有古老的，有现代的；有简单的，有复杂的。

In practice,there are a variety of methods to discover the law,some of which are hoary,some are modern,some are ****** and some are complex.

在实际进行法律发现的各种方法中，有古老的，有现代的；有简单的，有复杂的。

An example is applied to show the stability of hybrid systems could be analyzed by using multiple Lyapunov function when the switching hypersurface becomes sliding mode.

针对由离散事件监控连续动态系统的这一类混杂系统稳定性问题，首先分析了多Lyapunov函数方法己有结果的不足，用一个算例来说明切换超平面成为滑动模时，基于多Q叩unov函数方法，并不能证明混杂系统的稳定性。

We also adopt the iterative method to study the matrix nearness problem associated with these inconsistent matrix equations systematically in this dissertation, and characterize the minimization property of this iterative method by making use of the matrix function in subspace for the first time, which is the important improvement for the achievements of references.

本文还采用迭代方法系统地研究了问题Ⅰ，并首次利用子空间上的矩阵函数来刻画该迭代方法的极小化性质，这是对已有研究成果的重要补充和完善。

Fifthly, in order to overcome the difficulties and drawbacks of existing methods of input variable selection, a general engineering selection method is presented and implemented.

第五，针对已有模糊模型的输入变量选择方法的困难与缺陷，本文提出并实现了一种具有通用性的工程选择方法。

Using traditional supervised and unsupervised classification approaches, combining wiping off isolated point and isolated area, I want to check out the changed areas.

吸收传统变化检测方法中的监督、非监督分类方法，结合分类后孤立点和孤立区域的去除，检测出有变化的区域。

Our methods of spending state revenue must be strictly different from those of the Kuomintang.

我们对于国家收入的使用方法，应该和国民党的方法有严格的区别。

Experiments on both synthetic data and real data show that the method is superior to other linear subspace methods.

通过模拟数据和真实数据的实验，表明这种方法的分类正确率比现有的线性子空间方法有明显提高。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。