In this paper practical ultrasonic C-scan techniques for NDT of laminated composite materials are developed and applied, with an aim to trace specific artificial defects. Two types of materials are examined; an advanced carbon/epoxy system and a typical marine type glass/polyester system. Both were...
摘要: 浮萍为1995年版药典收载的正品中药材,来源于浮萍科植物紫萍Spirodela polyrrhi a(L.)Schleid的干燥全草.但市售浮萍品种十分复杂,为了正本清源,并评估浮萍的质量,本文对紫萍和青萍的生药形态,组织特征进行了研究.关键词: 浮萍;紫萍;青萍;生药形态及组织学 ...
匠心栏目组走进南京理想农业 1.匠心栏目组走进南京理想农业,揭示了这家企业背后的匠心故事。 南京理想农业,作为一家注重传承工匠精神的企业,致力于创新传统农业技艺,为市场带来高质量的农产品。匠心栏目组深入其生产基地,全方位展示了其在农业领域的创新探索和传统技艺的传承。 2.南京理想农业通过不断的技术创新和科学...
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摘要: 2002年8月～2009年6月,我们采用喙肩韧带移位重建喙锁韧带结合锁骨钩钢板内固定治疗肩锁关节脱位23例,疗效满意. 1 材料与方法 1.1 病例资料 本组23例,男14例,女9例,年龄15～56岁.左侧10例,右侧13例,均为单侧.采用Rockwood分类:Ⅲ型16例,Ⅳ型5例,Ⅴ型2例.关键词:...
摘要: The widespread uptake of platform strategies turns many vendors of enterprise software into curators of an ecosystem of firms that collaboratively develop and commercialize a share... 查看全部>>关键词: case study enterprise software knowledge boundaries knowledge boundary resources platform ecosystems...
A packing for a cooling tower is assembled from elements of sheet material in which horizontally elongated flat strips and corrugated or accordion folded strips are combined. Water supplied to the top of the packing assembly flows in a f... HEINZ FAIGLE - US 被引量: 18发表: 1972年 The inv...