The novel free-form deformation (FFD) technique presented in the paper uses scalar fields definedby skeletons with arbitrary topology. The technique embeds objects into the scalar field by assigning a field value to e...The novel free-form deformation (FFD) technique presented in the paper uses scalar fields definedby skeletons with arbitrary topology. The technique embeds objects into the scalar field by assigning a field value to each point of the objects. When the space of the skeleton is changed, the distribution of the scalar field changes accordingly, which implicitly defines a deformation of the space. The generality of skeletons assures that the technique can freely define deformable regions to produce a broader range of shape deformations.展开更多
The general computer-aided design （CAD） software cannot meet the mould design requirement of the autoclave process for composites, because many parameters such as temperature and pressure should be considered in the...The general computer-aided design （CAD） software cannot meet the mould design requirement of the autoclave process for composites, because many parameters such as temperature and pressure should be considered in the mould design process, in addition to the material and geometry of the part. A framed-mould computer-aided design system （FMCAD） used in the autoclave moulding process is proposed in this paper. A function model of the software is presented, in which influence factors such as part structure, mould structure, and process parameters are considered; a design model of the software is established using object oriented （O-O） technology to integrate the stiffness calculation, temperature field calculation, and deformation field calculation of mould in the design, and in the design model, a hybrid model of mould based on calculation feature and form feature is presented to support those calculations. A prototype system is developed, in which a mould design process wizard is built to integrate the input information, calculation, analysis, data storage, display, and design results of mould design. Finally, three design examples are used to verify the prototype.展开更多
目的评估先天性小耳畸形及单侧蜗神经发育不良致单侧耳聋患者采用骨导助听器干预的效果。方法收集9名2022年9月~2023年6月在我院接受骨导助听器验配患儿的14耳资料,其中6名患儿为先天性小耳畸形,3名为单侧蜗神经发育不良致感音神经性耳...目的评估先天性小耳畸形及单侧蜗神经发育不良致单侧耳聋患者采用骨导助听器干预的效果。方法收集9名2022年9月~2023年6月在我院接受骨导助听器验配患儿的14耳资料,其中6名患儿为先天性小耳畸形,3名为单侧蜗神经发育不良致感音神经性耳聋。验配助听器前后分别进行声场纯音测听、言语空间听觉质量量表-父母版(speech,spatial,and other qualities of hearing scale for parents,SSQ-P)问卷评估。使用STATSTM 2.0统计软件分析患儿验配前后的听阈和父母问卷得分差异。结果两组患儿在验配骨导助听器前后的听阈均呈显著差异,小耳畸形组(P<0.05),单侧耳聋组(P=0.005)。两组间验配后听阈无显著差异(P=0.47)。SSQ-P父母问卷得分在短期验配后均有改善。单侧耳聋组验配后的空间听觉能力问卷得分改善弱于小耳畸形组。结论先天性小耳畸形及单侧蜗神经发育不良致单侧耳聋患儿均能从骨导助听器验配中获益,其中单侧耳聋患儿的获益低于小耳畸形患儿。展开更多
文摘The novel free-form deformation (FFD) technique presented in the paper uses scalar fields definedby skeletons with arbitrary topology. The technique embeds objects into the scalar field by assigning a field value to each point of the objects. When the space of the skeleton is changed, the distribution of the scalar field changes accordingly, which implicitly defines a deformation of the space. The generality of skeletons assures that the technique can freely define deformable regions to produce a broader range of shape deformations.
文摘The general computer-aided design （CAD） software cannot meet the mould design requirement of the autoclave process for composites, because many parameters such as temperature and pressure should be considered in the mould design process, in addition to the material and geometry of the part. A framed-mould computer-aided design system （FMCAD） used in the autoclave moulding process is proposed in this paper. A function model of the software is presented, in which influence factors such as part structure, mould structure, and process parameters are considered; a design model of the software is established using object oriented （O-O） technology to integrate the stiffness calculation, temperature field calculation, and deformation field calculation of mould in the design, and in the design model, a hybrid model of mould based on calculation feature and form feature is presented to support those calculations. A prototype system is developed, in which a mould design process wizard is built to integrate the input information, calculation, analysis, data storage, display, and design results of mould design. Finally, three design examples are used to verify the prototype.
文摘目的评估先天性小耳畸形及单侧蜗神经发育不良致单侧耳聋患者采用骨导助听器干预的效果。方法收集9名2022年9月~2023年6月在我院接受骨导助听器验配患儿的14耳资料,其中6名患儿为先天性小耳畸形,3名为单侧蜗神经发育不良致感音神经性耳聋。验配助听器前后分别进行声场纯音测听、言语空间听觉质量量表-父母版(speech,spatial,and other qualities of hearing scale for parents,SSQ-P)问卷评估。使用STATSTM 2.0统计软件分析患儿验配前后的听阈和父母问卷得分差异。结果两组患儿在验配骨导助听器前后的听阈均呈显著差异,小耳畸形组(P<0.05),单侧耳聋组(P=0.005)。两组间验配后听阈无显著差异(P=0.47)。SSQ-P父母问卷得分在短期验配后均有改善。单侧耳聋组验配后的空间听觉能力问卷得分改善弱于小耳畸形组。结论先天性小耳畸形及单侧蜗神经发育不良致单侧耳聋患儿均能从骨导助听器验配中获益,其中单侧耳聋患儿的获益低于小耳畸形患儿。
