Application of Theory of Super Lubricityt of Minimum Entropy Welding

首先进行理论研究，以发展焊接技术。众所周知，表面织构的差异对材料的焊接性能有很大的影响。为了对表面纹理进行表征，研究了小波变换提取加工表面特征的方法。利用小波变换可以有效地分离加工表面的局部信息和长波长信息，这是单次USC傅里叶变换很难做到的。这种分离可以确定适合最小熵路径的表面轮廓。在本研究中，我们提出了一种新的小波变换方法来提取信号的相位信息。本文研究了在周期边界条件下利用三次小波提取信号相位信息的方法，并给出了相位信息的提取方法。其次，对超润滑理论进行了进一步的改进。为了将超润滑理论应用到最小熵路径法中，进行了理论上的考虑。他将改进的理论应用于用化学和物理方法改变表面的特定部分，使其具有理想的摩擦系数。已知采用改进理论的方法与普通的能量注入方法如激光或电子束法相比，需要相对较小的能量才能达到所需的表面条件。我们还知道，最小熵路径与加热等其他方法相比，产生的熵较少。从理论上探讨了表面信息快速传递的可能性。这一研究也是应用微摩擦学。指出了细菌鞭毛砂浆中存在超润滑性的可能性。我们尝试用最小熵路径法解释鞭毛砂浆的机理，得到了避免发作过程机理的定性解释。少

In first stage, thcorctical consideration is done In order to develop welding technology It is widely know that the diffcrcncc of surface textures strongly affect welding property of materials. To characterize the surface texture, we investigate the wavelet transformation to extract the characteristic feature of manufactured surface. By using wavelet transformation, separation of the local in formation of manufactured surface and long wavelength information which is very difficult when one USC Fourier transformation can be done efficiently. This separation enables the determination of surface profile suitable for minimum-entropy path. In this investigation, we fount new wavelet method which enable extraction of phase information of signal. Usually, extraction of phase information of signal is difficult when one uses dyadicwavelct, In this study, we develop the technique of using triadic-wavelet in periodic boundary condition and show the extraction of phase information.Next, the improv … More ement of theory of superlubricity is done. In order to apply theory of superlubricity to minimum-entropy path method, theoretical consideration is done.he improved theory is applied to change specific part of surface to have desired friction coefficient by chemical and physical method.It is known that the method using improved theory need relatively small energy to have the surface of desired condition compared with the ordinary energy injection method like laser of electron beam method. It is also known that the minimum entropy path results less entropy formation compared with the other method like heating. The possibility of the fast transfer of surface information is also investigated theoretically.This investigation is also applied micro-tribology. The possibility of existence of superlubricity in bacteria flagellar mortar is pointed out. We tried to explain the mechanism of flagellar mortar by applying minimum entropy path method and obtained qualitative explanation of the mechanism to avoid seizure process. Less