4篇
您的检索式：作者名="XU Yanshen"
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| 1 | NEW TECHNOLOGY FOR FAULT DIAGNOSIS BASED ON WAVELET DENOISING AND MODIFIED EXPONENTIAL TIME-FREQUENCY DISTRIBUTION显示文摘Fast wavelet multi-resolution analysis (wavelet MRA) provides a effective tool for analyzing and canceling disturbing components in original signal. Because of its exponential frequency axis, this method isn’t suitable for extracting harmonic components. The modified exponential time-frequency distribution ( MED) overcomes the problems of Wigner distribution( WD) ,can suppress cross-terms and cancel noise further more. MED provides high resolution in both time and frequency domains, so it can make out weak period impulse components fmm signal with mighty harmonic components. According to the 'time' behavior, together with 'frequency' behavior in one figure,the essential structure of a signal is revealed clearly. According to the analysis of algorithm and fault diagnosis example, the joint of wavelet MRA and MED is a powerful tool for fault diagnosis. | Wang Xinqing,Wang Yaohua,Qian Shuhua,Chen Liuhai (Engineering College of PLA University of Science and Technology) Xu Yanshen,Zhao Xiangsong (Tianjin University) | 2001 | Chinese Journal of Mechanical Engineering2001，14，3： | 13 |
| 2 | ADAPTABLE DESIGN OF MACHINE TOOLS STRUCTURES显示文摘Adaptable design aims to extend the utilities of design and product.The specific methods are developed for practical applications of adaptable design in the design of mechanical structures, including adaptable platform,interface and module designs.Adaptable redesign problems are formulated as adaptable platform design under adaptability bound constraints.Analysis tools are then suggested for the implementation of the redesign of machine tool structures,including variation techniques based sensitivity analysis,similarity-based commonality analysis,performance improvement,and adaptability measures.The specific measure of adaptability for machine tool structures is measured through the quantification of the structural similarity and performance improvement gained from adaptable design.The method provides designers with an approach that brings adaptability into the design process,with considering the cost and benefits of such adaptability. The redesign of CNC spiral bevel gear cutting machine structures has been included to illustrate these concepts and methods. | XU Yanshen CHEN Yongliang ZHANG Guojun GU Peihua | 2008 | Chinese Journal of Mechanical Engineering2008，21，3： | 9 |
| 3 | Research on knowledge base system of flexible modular design for mechanical products 显示文摘 | Hou Liang TANG Renzhong Xu Yanshen | 2004 | Journal of Zhejiang University2004，38，1： | 1 |
| 4 | Discussion on the Treatment of Palmoplantar Keratosis by TCM Soaking and Washing显示文摘By combing the mechanism and advantages of traditional Chinese medicine(TCM)soaking and washing and combining TCM syndrome differentiation with western medicine differentiation of diseases,guided by the view that'the principle of external treatment is that of internal treatment',this article discusses the differentiation and treatment ideas of palmoplantar keratosis by TCM soaking and washing,which will provide a reference for clinical treatment. | Yufu FANG Yanshen HU Juntao XU Li WANG Wenyu ZHAO | 2023 | Medicinal Plant2023，14，3： | 0 |
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