排序方式: 共有71条查询结果,搜索用时 15 毫秒
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将以光刻胶作为有机前驱物的热解成碳工艺与厚胶光刻工艺结合后,形成一种新的用于制备碳微结构的"C-MEMS(carbon-MEMS)"工艺,它流程简单、成本低、可重复性强且结构设计灵活.该工艺制备出的碳微结构具有较高深宽比(约为101)、良好的导电、导热和机械性能、优良的生物兼容性及化学惰性.综述了其发展过程和研究近况,介绍了该工艺的流程、可重复制备的典型结构以及一些特殊结构如碳纳米纤维等,阐明了其在三维微电池和介电电泳生物芯片等多个领域的应用,预见了该工艺可作为连接纳米、微米级结构的桥梁,将碳纳米纤维用于制备高表面积MEMS结构的前景. 相似文献
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We investigated the effects of heating rate on the process parameters of superplastic forming for Zr55Cu30Al10Ni55 by differential scanning calorimetry. The continuous heating and isothermal annealing analyses suggested that the temperatures of glass transition and onset crystallization are heating rate-dependent in the supercooled liquid region. Then, the time-temperature-transformation diagram under different heating rates indicates that increasing the heating rate can lead to an increase of the incubation time at the same anneal temperature in the supercooled liquid region. Based on the Arrhenius relationship, we discovered that the incubation time increases by 1.08–1.11 times with double increase of the heating rate at the same anneal temperature, and then verified it by the data of literatures and the experimental results. The obtained curve of the max available incubation time reveals that the incubation time at a certain anneal temperature in the supercooled liquid region is not infinite, and will increase with increasing heating rate until this temperature shifts out of the supercooled liquid region because of exceeding critical heating rate. It is concluded that heating rate must be an important processing parameter of superplastic forming for Zr55Cu30Al10Ni5. 相似文献
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We investigated the effects of heating rate on the process parameters of superplastic forming for Zr55Cu30Al10Ni5 by differential scanning calorimetry. The continuous heating and isothermal annealing analyses suggested that the temperatures of glass transition and onset crystallization are heating rate-dependent in the supercooled liquid region. Then, the time-temperature-transformation diagram under different heating rates indicates that increasing the heating rate can lead to an increase of the incubation time at the same anneal temperature in the supercooled liquid region. Based on the Arrhenius relationship, we discovered that the incubation time increases by 1.08-1.11 times with double increase of the heating rate at the same anneal temperature, and then verified it by the data of literatures and the experimental results. The obtained curve of the max available incubation time reveals that the incubation time at a certain anneal temperature in the supercooled liquid region is not infinite, and will increase with increasing heating rate until this temperature shifts out of the supercooled liquid region because of exceeding critical heating rate. It is concluded that heating rate must be an important processing parameter of superplastic forming for Zr55Cu30Al10Ni5. 相似文献
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自组织映射网络的可视化研究 总被引:6,自引:0,他引:6
提出了一种自组织映射网络训练结果的可视化方法—距离映射法,该方法根据输入向量与竞争层神经元权向量距离的大小来计算相似度,然后对所有相似度与对应神经元坐标之积求和,把输入向量映射到二维平面。对故障数据的试验分析表明,该方法能提供更加清晰的可视化表示。 相似文献