模态系统

This paper introduces H∞ robust control theory to design thesliding manifold of the variable structure control system.

本系统的干扰不满足扰动与系统的完全匹配条件，因此滑模控制系统的滑动模态将受到扰动的影响。

These antennas can cover GSM900/DCS/PCS/UMTS operation. In the chapter 2, the antenna is designed based on the concept of monopole antenna. Furthermore, the antenna structure have two radiant paths and coupled each other at tail end to do impedance matching. In addition, to raise distance between radiation plane and ground will avoid capacitative effect effectually. In the chapter 3, the antenna is designed based on the concept of planar inverted-F antenna. Furthermore, that the antenna structure have two radiant paths and coupled each other at tail end to do impedance matching is similar to chapter 2. But there is a difference in them. We can choose the short position to change input impedance at this structure. In the chapter 4, the antenna is designed based on the concept of planar inverted-F antenna which takes coupled-fed. It will produce the first mode and high-order mode near the frequency, 900MHz. The feature of this type is to reduce the volume effectually. This antenna can not only cover GSM900/DCS/PCS/UMTS operation but maintain good radiation efficiency. Finally, we will compare three antennas, and develop procedure with industrial view, and propose the prospect of the GSM/GPRS antenna in PND, as a conclusion.

在第二章中，我们使用单极天线设计概念，使用双路径架构并於末端耦合来对天线阻抗做匹配，产生涵盖GSM900/DCS/PCS/UMTS四频操作频带，并提高与接地面的辐射高度，以避免电容效应，使天线具有良好的辐射特性；在第三章中，使用倒F形天线设计概念，使用双路径架构於末端耦合，并於辐射臂上采取适当接地点电感效应作输入阻抗匹配，达成涵盖GSM900/DCS/PCS/UMTS系统的四个操作频带；在第四章中，采用倒F形架构并使用耦合馈入方式，使得长辐射金属臂在低频900 MHz附近产生共振，产生低频基频模态及高阶模态，以达成宽频及频宽涵盖GSM900/DCS/PCS/UMTS频带操作，并有效缩减使用体积；最后，分别比较此三种架构的优缺点，再加以业界角度来思考，研发产品天线的流程及思考方向，以及天线应用於可携式导航装置中未来的展望作为本论文的总结。

This is a good application of laser measurement technology in the test of a car body mode, which overcomes the limitation of a single scanning laser vibrometer in the test of 3-dimension modal shape of a structure. The use range of the single scanning laser vibrometer is also expanded.

这是激光测振技术在白车身模态实验中的一个很好的应用，而且较好地克服了单头激光测振系统难于测试结构三维空间模态的局限性，扩展了单头激光测振仪的使用范围。

Beginning with raising the signal noise ratio of the global identification, the global identification method weighted with modal shapes is presented, which permutes and composes the elements of FRF in the form of the sum of modal shape squares and obtains global modal parameters with relatively high SNR.

本文在综合分析现代模态分析领域国内外现状的基础上，以学科的一些难点为研究对象，对系统模态参数识别、动态建模、动态修改领域存在的问题进行了广泛深入的研究，取得了一系列独创性的研究成果。

On the basis of this discussions, the author gives the standard system of deontic logic which was created by Von Wright and abstracts the development from the classic system to the standard system of deontic logic.

真性模态和道义模态之间存在着类似和区别，在此基础上给出冯·赖特道义逻辑的经典系统，说明经典道义逻辑在向标准道义逻辑发展

When appling paraconsistent logic to alethic modal logic,we get a deontic logic system which avoids the ...

当将弗协调逻辑运用于真值模态逻辑时，可得到一避免了善良的撒玛利亚人悖论的道义逻辑系统，于是我们可得出结论：道义逻辑可归约为弗协调真值模态逻辑

The stable lobe graph for high speed milling of 2A12 aluminum alloy thin-walled workpieces was obtained by utilizing modal parameters and force coefficients,which were acquired respectively by milling tests and modal analysis tests on Mikron high speed...

针对2A12铝合金薄壁结构零件，利用M ikron高速加工中心和相关仪器，通过铣削力实验和模态实验，分别测得特定刀具和工件系统的动态铣削力系数和模态参数，从而绘制出高速铣削薄壁零件的稳定性叶瓣图，得到了不同径向切深条件下的极限轴向切深，并通过试验进行了验证。

In chapter 6, the new concept of thermal modal feedback is presented. The mechanism that secondary actuator cause precision machine to reduce thermal balance time is studied and the problem of thermal control system design is solved. The algorithm of thermal modal feedback control to move the thermal balance time is developed.

第六章提出热模态反馈新概念，研究温控策略中低温升控制和高温升控制使精密机械尽早进入并保持热平衡状态的内在机理，从理论上解决人工辅助冷热源法控制系统的设计问题，并对采用热模态反馈控制移动热平衡时间的算法进行了研究。

All the above research forms the basis theory system of vibration theory modality and experimental modal for the light thin plate retaining wall system and its health diagnose technology.

通过本文的研究，形成了轻型薄板挡土墙系统振动理论模态与试验模态的基本理论体系以及健康诊断的分析技术。

It is a more preferable to simpler frequency criterion, since it takes into account of frequency, vibration mode, damping, s ensor and actuator information. Reduced order model can approximate well the bas i c characteristics of the original system.

该法考虑了可观性向量、模态增益、结构阻尼系数及模态频率，较简单的频率截断法是一个很大的改进，降阶后的模型能很好地近似原系统性能。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。