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Firstly, this paper investigated roundly the basic theory of the ambient vibration method, analyzed systematically the main methods of ambient vibration identification, and discussed their advantages and disadvantages. Then we established the finite element model of structural dynamics and test model and analyzed their mutual relation, improved MUSIC method and correlation function method in the harmonic identification, and gave the subspace method and correlation function method based on continuous model, which is multi-harmonic retrieve technique. And then, this paper also puts forward least-squares method to estimate directly structural physical and modal parameters; this approach replaced the derivative operator in the continuous time model with an equivalent approximation, and estimated the physical parameters of structures by the least-squares method. And then, we discussed the approximation methods of derivative and their convergence. Finally, this paper researched the modal parameters of a frame structure by the simulation and test. The results demonstrated that subspace method, correlation function method and the least-squares method are effective and stable respectively.

全面地研究环境振动识别方法的基本理论,系统地分析环境振动识别方法的主要方法,讨论它们的优点和不足;建立结(来源:6666AB44C论文网www.abclunwen.com)构动力学的有限元模型和试验模型,分析有限元模型与试验模型之间的相互关系;改进谐波识别中的MUSIC识别方法和相关函数识别方法,给出大型结构模态识别的连续型的子空间分解识别方法和相关函数识别方法,这个方法是多元谐波识别方法;提出直接识别结构的物理参数和模态参数的最小二乘方法,这个方法利用导数的近似值代替导数值,并运用最小二乘方法识别结构的物理参数,讨论导数近似值的选择方法,分析算法的收敛性;通过仿真计算和模型实验,研究高层框架结构的模态参数识别,验证子空间分解识别方法、相关函数识别方法和最小二乘识别方法的有效性,算法的稳定性;从理论和试验两个方面分析和研究噪声对识别精度的影响,影响识别精度的因素,以及部分模态成分的模态参数不能够被识别的原因。

Set up continuous improvement method, verify the process monitor, corrective action and prevention system.

持续改进的方法与监督执行纠正预防机制的有效性

The key points are extracted by comparing the angle changes of the contour line of every neighborhood point.

最后,在两个公开的掌纹数据库,通过实验证明了这种算法的有效性

As a result the contrariety of computational effort and accuracy is solved we...

通过对IEEE-RTS试验系统的计算,表明该方法的正确性和有效性

Relativity,similarity,and contrariety are three ways of the thinking association.

文章把负值引入到相似度计算中,提出对立度等概念和相关的计算模型,将它们运用到语义对立程度的计算中,并通过仿真试验论证了这些概念模型和计算方法的可行性和有效性

The method includes steps: first, the main control desk validates validity of certificate of network phone equipment.

该方法包括以下步骤,首先,主控台对网络电话设备证书的有效性进行验证。

The effectiveness of the control methods is proved by experiment and simulation results.

仿真及实验结果证明了控制策略的有效性

Finally, the validity of the proposed method is proved with the robot plane motion control experiment.

最后,通过机器人平面运动控制的实验研究,验证了所提控制方法的有效性

Include studying the effective of the test, discussing the course of control and logical sequence.

包括对试验有效性进行分析,并对试验结果出现的控制过程及逻辑控制过程出现问题进行深入的探讨。

It is well known as a test bed for new control theory and techniques.

它是检验各种新的控制理论和方法的有效性的著名实验装置。

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Do you know, i need you to come back

你知道吗,我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书,王祥生,李德昌。安徽省首次发现嗜群血蜱。

Chapter Three: Type classification of DE structure in Sino-Tibetan languages.

第三章汉藏语&的&字结构的类型划分。