排序方式: 共有3条查询结果,搜索用时 0 毫秒
1
1.
2.
Stability design of submarine pipelines is a very important procedure in submarine pipeline engineering design. The calculation of hydrodynamic forces caused by waves and currents acting on marine pipelines is an essential step in pipeline design for stability. The hydrodynamic forces-induced instabilities of submarine pipelines should be regarded as a wave/ current-pipeline-seabed interaction problem. This paper presents a review on hydrodynamic forces and stability research of submarine pipelines under waves and currents. The representative progress including the improved design method and guideline has been made for the marine pipelines engineering design through experimental investigations, numerical simulations and analytical models. Finally, further studies on this issue are suggested. 相似文献
3.
TACE 术后碘油沉积形态的分型及其临床意义 总被引:8,自引:0,他引:8
目的是随着经导管的动脉化疗栓塞、(TACE)疗法治疗肝癌的广泛应用,磺油在CT、MRI检查中的信号表现受人关注,肝癌栓塞剂磺油的MRI特性仍存在着争议。碘油在病灶部位沉积的量,随时间变化,并与疗效密切相关,所以确立诊断,观察疗效就要有统一的检查时间和手段。材料和方法:回顾TACE术后的影像资料,复习文献。对碘油分布的形态进行统计,与疗效的统计进行比较。以CT表现为金标准。结果:我们认为分4型较好,1、稀少型,累计病灶内碘油沉积面积少于30%者列为稀少型,不再细分,并尽快改用其它的治疗肝癌的方法,因为,这型的TACE治疗效果不佳,不必第二次用TACE,再去分型也就没有实际意义了。2、均匀型,整个病灶均匀摄取碘油。3、缺损型,包括环型和某一区域沉积等情况。4、族集型,碘油呈小簇状分散型分布,但肿瘤内碘油潴留累计不少于30%。结论:关于肝癌TACE后碘油沉积形态的CT分型,说法不一。需要进一步探讨统一。 相似文献
1