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CAN总线干扰发生器研制 总被引:2,自引:0,他引:2
本文研制了一种可以用来模拟CAN总线错误并能够干扰CAN总线物理层特性的CAN总线干扰发生器设备。该设备可以在用户配置下工作在不同的触发模式、产生不同的干扰模式,用来满足不同的CAN总线测试需要。文中详细介绍了CAN总线干扰发生器的功能及软硬件设计,最后的测试结果证明了CAN总线干扰发生器的有效性。 相似文献
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H. A. Mang B. Pichler T. Bader J. Füssl X. Jia A. Fritsch J. Eberhardsteiner Ch. Hellmich 《Acta Mechanica》2012,223(9):1937-1957
Structures may fail due to a myriad of different causes. Often, distinction is made between structural and material failure, that means a structure can fail, while the material is still intact (this is the case in so-called stability loss), or the material fails, which, as consequence, may lead to structural failure. The material behavior may turn out difficult to be mathematically guessed at the macro-level. On the other hand, a lot may be known about the chemistry or the microstructure of the material of interest. Herein, we aim at categorizing different scenarios which in the end provoke structural failure, discussing various cases investigated during the last five years, at the Institute for Mechanics of Materials and Structures of Vienna University of Technology: A well-chosen eigenvalue problem shows considerable potential for categorizing stability loss. We then turn to complex composite materials with a hierarchical organization, where a single constituent dominates the overall quasi-brittle failure of the material, such as lignin in wood and wood products, or the cement–water reaction products (shortly called hydrates) in cement-based materials. The picture changes if the first inelastically behaving constituent is related to ductile load carrying, then the loads within the microstructure are re-distributed before the overall material fails: this turns out to be the case in bone. Finally, due to highly confined multiaxial stress states, the elastic portion of the overall energy invested into the material may become negligible—and then yield design analysis employed on material volumes gives an idea of the highly ductile behavior of complex confined materials, such as asphalt. What integrates all the reported cases is the high capacity of mature mathematical and mechanical formulations to reveal the intricate, yet decipherable nature of the (continuum) mechanics of materials and structures. 相似文献
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Orientation control of epitaxial Ge thin films growth on SrTiO3 (100) by ultrahigh vacuum sputtering
Wensheng Deng Ming Yang Jianwei ChaiTen It Wong Anyan DuChee Mang Ng Yuanping Feng Shijie Wang 《Thin solid films》2012,520(15):4880-4883
We report the orientation control of crystalline Ge (111) and Ge (001) growth on SrTiO3 (100) substrate by adjusting the temperature of substrate. It is found that the substrate temperature plays an important role for the formation of crystalline Ge with different surface orientations and interfacial chemical configuration during the sputtering process. At 500 °C, Ge (111) with good crystalline quality is formed, while Ge (001) is preferably grown on SrTiO3 substrate at 650 °C. Our results show the possibility of manipulating the surface orientations during Ge growth on SrTiO3 by controlling the substrate temperatures. 相似文献
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Zengshi Xu Xiaoliang Shi Mang Wang Wenzheng Zhai Jie Yao Siyuan Song Qiaoxin Zhang 《Tribology Letters》2014,53(3):617-629
Dry sliding tribological properties of TiAl matrix self-lubricating composites (TMSC) containing Ag, Ti3SiC2, Ag and Ti3SiC2 were investigated from 25 to 800 °C under ball-on-disk test conditions against Si3N4 counterface under the same conditions of 10 N-0.234 m/s. The results indicated that the tribological properties were strongly dependent on the lubricant additives. TMSC with the addition of Ag and Ti3SiC2 (TAT) exhibited the lower friction coefficients (0.32–0.43) and less wear rates (1.23–4.13 × 10?4 mm3 N?1m?1) in the wide temperature range of 25–800 °C. The excellent tribological properties of TAT over the wide temperature range were attributed to the synergetic effect of Ag and Ti3SiC2 lubricants, silver diffusion forming a rich-silver smooth tribo-film on the frictional surface of TAT at low and moderate temperatures from 25 to 400 °C, while Ti3SiC2 oxidation reaction forming rich-oxide tribo-film on the worn surface of TAT at higher temperatures of 600 and 800 °C. 相似文献