搜索结果: 1-15 共查到“知识库 理学 3D”相关记录242条 . 查询时间(0.183 秒)
首个人类气味受体3D结构有望探明嗅觉的秘密
气味受体 3D结构 气味分子 自然
2023/7/4
日常生活中充满了各种气味，令人愉悦的花香、让人作呕的腐烂气味儿... ...人们利用鼻子中的气味受体蛋白接收这些信息。
宋延林课题组发展结构色3D打印新策略（图）
宋延林课题组 3D打印 结构色 三维光子晶体
2023/1/6
三维光子晶体由于其独特的光学性质而受到广泛关注，并在各个领域展现出广阔的应用前景。3D打印技术为构建复杂的三维光子晶体结构提供了可能。然而，常见的喷墨打印、直写打印以及熔融沉积方法会受限于构造三维结构的自由度、繁琐冗长的平衡着色过程及较弱的体积结构色性质，阻碍了其广泛应用。虽然有报道利用非连续的3D打印可以实现三维光子晶体的快速制备，但其粗糙的表面形貌和低保真性难以满足光学器件的要求。因此，如何通...
金属含羞草：金属玻璃仿生3D屈曲结构（图）
金属玻璃 仿生 3D屈曲结构 金属含羞草
2023/1/6
含羞草在抵御触碰、机械振动和风等外界的侵扰时，其叶片会自动闭合；当外部刺激消失后，叶片又会重新打开。这是因为叶片内水的重新分布，使叶片一侧的细胞收缩，另一侧的细胞膨胀，从而在叶片两面产生尺寸错配。另外，植物生长造成的不同部分（叶脉和非叶脉部分）的尺寸差异，也会使花瓣和叶子存在自然弯曲和可翻转的三维形状。受植物的启发，这项研究采用结构材料（金属玻璃）模拟震感植物的变形行为，利用金属玻璃和其部分区域晶...
流体在岩石孔隙中的运移规律及其流固耦合效应是地下油气储备与开发的核心科学问题，也是导致不同工程灾害或工程难题的重要因素。精确表征岩石微观孔隙结构，探寻微观孔隙结构与宏观物理性质的内在关联，实现岩石宏观物理参数的精确计算，是开展深部岩体相关工程研究的基础。
基于电阻焦耳热调控3D纳米桥结的临界电流
超导三端子器件 3D纳米桥结 临界电流 焦耳热
2022/3/21
近些年来，超导三端子器件通过引入第三端可控变量可以实现单个约瑟夫森结两端临界电流的调控，受到广泛关注。本文介绍了一种微缩型的超导三端子器件结构，通过电阻电流产生的焦耳热来调节3D纳米桥结附近的局部温度，从而实现有效调节3D纳米桥结的临界电流。本实验利用了两种氩（Ar）离子表面清洗条件制备获得了两种不同电阻特性的铝（Al）电阻条，并且测量表征了这两种电阻条的电流焦耳功率分别与单个和两个3D纳米桥结的...
3D动脉自旋标记技术在1级高血压脑灌注中的应用价值
3D动脉自旋标记灌注成像 高血压脑病 脑组织血流量
2020/6/15
使用3D动脉自旋标记（ASL）灌注成像对1级高血压患者的脑血流灌注进行定量分析，以探讨其应用价值。方法：对1级高血压患者组（36例）及非高血压健康对照组（14例）分别行常规MRI扫描及3D ASL灌注成像，并测量两组受检者17个特定脑区局部脑血流量（CBF）值，反映脑血流动力学参数，比较各脑区的灌注参数差异。
3D MODELING FOR ROCK ART DOCUMENTATION USING LIGHTWEIGHT MULTISPECTRAL CAMERA
Rock Art Geometric Recording Multispectral Camera TLS, SfM
2019/3/4
This paper discusses the use of the lightweight multispectral camera to acquire three-dimensional data for rock art documentation application. The camera consists of five discrete bands, used for taki...
SCAN-TO-BIM vs 3D IDEAL MODEL HBIM: PARAMETRIC TOOLS TO STUDY DOMES GEOMETRY
Procedural Modeling HBIM Domes Parametric tools
2019/3/1
The contribution is part of an interdisciplinary research that aims to address the problems of knowledge, interpretation and documentation of vulnerable structures such as the brick Renaissance domes ...
UNIFIED TOPOLOGICAL FRAMEWORK FOR RETRIEVING 2D AND 3D MULTI-SCALE SPATIAL INFORMATION
Topological connectivity CityGML 3D building multi-scale LoD 2D and 3D model
2018/11/9
Different applications or users need different model (differ requirement on level of details; geometry and information), less focuses in topological element. Improper manage geometry, attribute and to...
探讨3.0T MR 3D-FIESTA序列成像技术对诊断血管压迫性三叉神经痛(TN)的应用价值。应用3.0T MR 3D-FIESTA序列成像技术对本院30例血管压迫性TN患者进行影像学分析及诊断,观察每例患者的诊断结果。结果显示患者经3.0T MR 3D-FIESTA序列成像技术诊断结果与患者后期的微血管减压术(MVD)术中结果相吻合,TN的一侧图像可显示出血管受到压迫,而未出现三叉神经痛的一侧...
3D RECONSTRUCTION FROM UAV-BASED HYPERSPECTRAL IMAGES
Cubert UHD185 Hyperspectral images Structure from motion 3D reconstruction Database
2018/5/15
Reconstructing the 3D profile from a set of UAV-based images can obtain hyperspectral information, as well as the 3D coordinate of any point on the profile. Our images are captured from the Cubert UHD...
MESH MODELLING OF 3D POINT CLOUD FROM UAV IMAGES BY POINT CLASSIFICATION AND GEOMETRIC CONSTRAINTS
Surface Reconstruction Surface Normal Point cloud Mesh model
2018/6/4
The point cloud generated by multiple image matching is classified as an unstructured point cloud because it is not regularly point spaced and has multiple viewpoints. The surface reconstruction techn...
3D RECONSTRUCTION-REVERSE ENGINEERING – DIGITAL FABRICATION OF THE EGYPTIAN PALERMO STONE USING BY SMARTPHONE AND LIGHT STRUCTURED SCANNER
Cultural Heritage Structured Light Scanning Smartphone 3D modeling 3D sculpting Digital Fabrication
2018/6/4
This paper presents a pipeline that has been developed to acquire a shape with particular features both under the geometric and radiometric aspects. In fact, the challenge was to build a 3D model of t...
“TORINO 1911” PROJECT: A CONTRIBUTION OF A SLAM-BASED SURVEY TO EXTENSIVE 3D HERITAGE MODELING
SLAM photogrammetry LiDAR Zeb Revo RT Mobile Mapping Systems landscape Cultural Heritage
2018/6/4
In the framework of the digital documentation of complex environments the advanced Geomatics researches offers integrated solution and multi-sensor strategies for the 3D accurate reconstruction of str...
SPECTRAL AND 3D CULTURAL HERITAGE DOCUMENTATION USING A MODIFIED CAMERA
Spectral imaging image-based 3D reconstruction cultural heritage camera characterisation image quality
2018/6/5
Spectral and 3D imaging techniques are used for museum imaging and cultural heritage documentation providing complementary information to aid in documenting the condition, informing the care, and incr...