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Prevention of laryngeal webs through endoscopic keel placement for bilateral vocal cord lesions
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《医学前沿(英文)》 2018年 第12卷 第3期 页码 301-306 doi: 10.1007/s11684-017-0549-0
Transoral microresection for treatment of vocal cord lesions involving the anterior commissure may result in anterior glottic webs. In this study, we retrospectively reviewed 54 patients who underwent microsurgery for bilateral lesions involving the anterior commissure and categorized them into two groups. The keel placement and control groups received endoscopic keel placement and mitomycin C, respectively. During the follow-up of at least 1 year, the laryngeal web formation rate significantly decreased in the keel placement group compared with that in the control group (18.6% versus 54.5%, <0.05). Furthermore, the voice handicap index-10 scores for patients without web formation decreased in both the keel placement and control groups ( <0.0001 and <0.001, respectively). A pseudomembrane covering the vocal cords was detected in 16.3% (7 of 43) cases after keel removal. A total of 100% (7 of 7) of these cases and 2.8% (1 of 36) of the other cases formed laryngeal webs ( <0.0001). Endoscopic keel placement could be an effective method for preventing anterior glottic webs after surgery for bilateral vocal cord diseases involving the anterior commissure. The pseudomembrane observed at the time of keel removal may imply a high risk of web formation.
关键词: glottic stenosis glottic web laryngeal keel silastic sheets anterior commissure
Amir ALLAHBAKHSHI,Masih ALLAHBAKHSHI
《机械工程前沿(英文)》 2015年 第10卷 第2期 页码 187-197 doi: 10.1007/s11465-015-0339-9
In this paper, for the first time, the modified strain gradient theory is used as a new size-dependent Kirchhoff micro-plate model to study the effect of interlayer van der Waals (vdW) force for the vibration analysis of multilayered graphene sheets (MLGSs). The model contains three material length scale parameters, which may effectively capture the size effect. The model can also degenerate into the modified couple stress plate model or the classical plate model, if two or all of the material length scale parameters are taken to be zero. After obtaining the governing equations based on modified strain gradient theory via principle of minimum potential energy, as only infinitesimal vibration is considered, the net pressure due to the vdW interaction is assumed to be linearly proportional to the deflection between two layers. To solve the governing equation subjected to the boundary conditions, the Fourier series is assumed for w=w(x, y). To show the accuracy of the formulations, present results in specific cases are compared with available results in literature and a good agreement can be seen. The results indicate that the present model can predict prominent natural frequency with the reduction of structural size, especially when the plate thickness is on the same order of the material length scale parameter.
关键词: graphene van der Waals (vdW) force modi- fied strain gradient elasticity theory size effect parameter
Cooling performance of grid-sheets for highly loaded ultra-supercritical steam turbines
Dieter BOHN , Robert KREWINKEL , Shuqing TIAN ,
《能源前沿(英文)》 2009年 第3卷 第3期 页码 313-320 doi: 10.1007/s11708-009-0036-7
关键词: steam turbines 700& deg C-technology numerical inverstigation cooling
《结构与土木工程前沿(英文)》 2022年 第16卷 第1期 页码 131-143 doi: 10.1007/s11709-021-0787-8
关键词: RC beams flexural strengthening CFRP CNTs finite element
吴智深,岩下健太郎,牛赫东
《中国工程科学》 2005年 第7卷 第9期 页码 18-24
近年采用外部粘结纤维增强复合材料(FRP)来加固结构越来越受到许多研究开发机构和生产单位的重视。结合作者在FRP方面的研究成果和最新开发出的高强高性能的PBO纤维材料,系统地提出了一种更为有效的预应力外粘结加固方法;通过与玻璃纤维、炭素纤维和芳纶纤维等的比较,认清了新型PBO纤维材料的特性;根据既有的试验和研究成果提出了一套完整的预应力加固方法的流程,包括概念、原理和几种降低端部界面应力和新型锚固的措施;室内小型试验和室外大型试验的结果表明,PBO片材预应力技术能够提供令人满意的加固性能。
关键词: 纤维增强聚合物(FRP) PBO纤维片材 增强加固 外粘结 锚固措施
张钧萍,马鸣图,方刚,金庆生
《中国工程科学》 2014年 第16卷 第1期 页码 108-112
通过力学性能测试、烘烤硬化性能测试和抗凹性能测试,研究了用于制备汽车覆盖件的6016 铝合金板材的抗凹性能以及抗凹性与材料力学性能和烘烤硬化性能之间的关系。结果表明:6016 铝合金板材经两年自然时效后,其强度略有增加,加工硬化指数n 值和延伸率增大;板材在不同温度条件下经30 min烘烤后强度增加,烘烤硬化值随着温度升高而显著增加,表现出良好的烘烤硬化性能;板材的抗凹性能与烘烤工艺有关,烘烤温度越高,烘烤后材料的屈服强度越高,板材的抗凹性能越好。
Yasmin MURAD, Wassel AL BODOUR, Ahmed ASHTEYAT
《结构与土木工程前沿(英文)》 2020年 第14卷 第2期 页码 554-568 doi: 10.1007/s11709-020-0613-8
关键词: retrofitting CFRP sheets recycled concrete pulverised fuel ash silica fume cyclic beam-column connections
标题 作者 时间 类型 操作
Prevention of laryngeal webs through endoscopic keel placement for bilateral vocal cord lesions
null
期刊论文
Vibration analysis of nano-structure multilayered graphene sheets using modified strain gradient theory
Amir ALLAHBAKHSHI,Masih ALLAHBAKHSHI
期刊论文
Cooling performance of grid-sheets for highly loaded ultra-supercritical steam turbines
Dieter BOHN , Robert KREWINKEL , Shuqing TIAN ,
期刊论文
enhancement using carbon nanotubes on flexural behavior of RC beams strengthened with externally bonded CFRP sheets
期刊论文