检索结果-南通市图书馆

大学英语 1990年第5期 86-87页

作者：黄大治

Every one is provided by nature with a set of finger-prints entirely different from those of everybody else. It is now accepted as a scientific fact that no two people have the same finger-prints. The ten finger-prints of one person always differ from the complete set of another. But that is not all. The print of each separate finger of a person also differs from his prints of all other fingers and from the prints of other fingers in the world.

关键词： Finger prints

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The Influence of Suzhou's Taohuawu New-Year prints

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海外英语 2012年第3X期 176-179页

作者： CAO Min-zhu (Art Academy of Xiamen University, Xiamen 361005,China) Art Acadeny of Xiamen University. Xiamen 361005 China

This paper is about New-Year woodcut prints done in the Taohuawu area of Suzhou in the Chinese Ming and Qing periods that influenced Edo period ukiyo-e. And Japanese ukiyo-e impacted Western Post-Impressionism. The subject matters of Taohuawu en gravings came from Chinese folk life, and were highly decorative. The engravings were reasonably inexpensive for ordinary people. This art form influenced ukiyo-e directly. As a Japanese engraving expert wrote: "Chinese prints were a good model for Japanese engravings. Chi nese New-Year engravings moved Japanese ukiyo-e artists so much that the new idea of ukiyo-e was influenced largely by them." [1]

关键词： Taohuawu New-Year prints ukiyo-e folk custom

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Hot Vapor Bubble prints on Carbon Steel

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Journal of Applied Mathematics and Physics 2017年第2期5卷 439-448页

作者： Gil Bazanini José Divo Bressan Department of Mechanical Engineering Santa Catarina State University-UDESC Joinville Brazil

To study the effects of bubbles (or cavities) collapse on a solid surface, a rotating disk device was used here to create bubbles (or bubbles) in water. In the apparatus, these bubbles are led to collapse on the surface of carbon steel (commonly used in structures and machine impellers), and so related to higher costs for the hydraulic machines industry when damaged by such phenomenon, for example. After that, the specimens are observed with the aid of a scanning electronic microscope, where the damages on the specimens are analyzed showing pits and approximate circular areas on their surfaces. An explanation is presented here, based on collapse simulations (for qualitative purposes) and their result using images of the specimens after the collapses to visualize the damages caused by prints on their surface. The pits are certainly made by liquid micro-jet impingement while the areas, showing some aspects of burning, are credited to the high temperature impaction of the bubble contents in the final stages of its collapse.

关键词： High Temperature Bubble Erosion Damage prints

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Surface Roughness Quality and Dimensional Accuracy—A Comprehensive Analysis of 100% Infill Printed Parts Fabricated by a Personal/Desktop Cost-Effective FDM 3D Printer

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Materials Sciences and Applications 2018年第1期9卷 11-40页

作者： Mohammad S. Alsoufi Abdulrhman E. Elsayed Department of Mechanical Engineering College of Engineering and Islamic Architecture Umm Al-Qura University Makkah KSA

Fused deposition modeling (FDM) has become widely used for personal/ desktop cost-effective printers. This work presents an investigational platform, which is used to study the surface roughness quality, and dimensional accuracy of 100% infill density printed parts fabricated by a personal/desktop cost-effective FDM 3D printer using different types of thermoplastic filament materials namely, PLA, PLA+, ABS and ABS+. Varieties of experiments were conducted after the fabricated parts were naturally cooled down for at least three hours to room temperature. During printing work, the nozzle diameter, layer height, nozzle temperature and printing speed were set at 0.3 mm, 0.1 mm, 220°C and 30 mm/s, respectively. According to the experimentally obtained data results over 10 mm scanned profile and 90°measuring direction (perpendicular to building direction), PLA+ thermoplastic filament material shows an excellent surface behaviour and is found to be more accurate while ABS does exhibit high surface roughness, waviness and primary behaviour. Both PLA and ABS+ show good surface performance.

关键词： Additive Manufacturing (AM) Surface Roughness Waviness Primary 3D prints Fused Deposition Modeling (FDM)

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