scholarly journals Application of Tessellation in Architectural Geometry Design

2018 ◽  
Vol 38 ◽  
pp. 03015 ◽  
Author(s):  
Wei Chang
Keyword(s):  
Computer Technology ◽  
Architectural Design ◽  
Voronoi Tessellation ◽  
Surface Display ◽  
Three Dimensional ◽  
Structure Design ◽  
Control Surface ◽  
Architectural Geometry ◽  
Geometry Design ◽  
Delaunay Triangles

Tessellation plays a significant role in architectural geometry design, which is widely used both through history of architecture and in modern architectural design with the help of computer technology. Tessellation has been found since the birth of civilization. In terms of dimensions, there are two- dimensional tessellations and three-dimensional tessellations; in terms of symmetry, there are periodic tessellations and aperiodic tessellations. Besides, some special types of tessellations such as Voronoi Tessellation and Delaunay Triangles are also included. Both Geometry and Crystallography, the latter of which is the basic theory of three-dimensional tessellations, need to be studied. In history, tessellation was applied into skins or decorations in architecture. The development of Computer technology enables tessellation to be more powerful, as seen in surface control, surface display and structure design, etc. Therefore, research on the application of tessellation in architectural geometry design is of great necessity in architecture studies.

VESTA 3for three-dimensional visualization of crystal, volumetric and morphology data

2011 ◽  
Vol 44 (6) ◽  
pp. 1272-1276 ◽  
Author(s):  
Koichi Momma ◽  
Fujio Izumi
Keyword(s):  
Search Algorithm ◽  
Voronoi Tessellation ◽  
Three Dimensional ◽  
Structure Parameters ◽  
Volumetric Data ◽  
Complex Molecules ◽  
Visualization System ◽  
Performance Improvements ◽  
Significant Performance

VESTAis a three-dimensional visualization system for crystallographic studies and electronic state calculations. It has been upgraded to the latest version,VESTA 3, implementing new features including drawing the external morphology of crystals; superimposing multiple structural models, volumetric data and crystal faces; calculation of electron and nuclear densities from structure parameters; calculation of Patterson functions from structure parameters or volumetric data; integration of electron and nuclear densities by Voronoi tessellation; visualization of isosurfaces with multiple levels; determination of the best plane for selected atoms; an extended bond-search algorithm to enable more sophisticated searches in complex molecules and cage-like structures; undo and redo in graphical user interface operations; and significant performance improvements in rendering isosurfaces and calculating slices.

Hierarchical Nano/Micro-structured Surfaces with High Surface Area/Volume Ratios

2021 ◽  
pp. 1-36
Author(s):  
Ketki Lichade ◽  
Yizhou Jiang ◽  
Yayue Pan
Keyword(s):  
Surface Structure ◽  
Surface Area ◽  
Light Trapping ◽  
High Surface ◽  
High Surface Area ◽  
Three Dimensional ◽  
Structure Design ◽  
Surface Structures ◽  
Structured Surfaces ◽  
Design And Manufacture

Abstract Recently, many studies have investigated additive manufacturing of hierarchical surfaces with high surface area/volume (SA/V) ratios, and their performance has been characterized for applications in next-generation functional devices. Despite recent advances, it remains challenging to design and manufacture high SA/V ratio structures with desired functionalities. In this study, we established the complex correlations among the SA/V ratio, surface structure geometry, functionality, and manufacturability in the Two-Photon Polymerization (TPP) process. Inspired by numerous natural structures, we proposed a 3-level hierarchical structure design along with the mathematical modeling of the SA/V ratio. Geometric and manufacturing constraints were modeled to create well-defined three-dimensional hierarchically structured surfaces with a high accuracy. A process flowchart was developed to design the proposed surface structures to achieve the target functionality, SA/V ratio, and geometric accuracy. Surfaces with varied SA/V ratios and hierarchy levels were designed and printed. The wettability and antireflection properties of the fabricated surfaces were characterized. It was observed that the wetting and antireflection properties of the 3-level design could be easily tailored by adjusting the design parameter settings and hierarchy levels. Furthermore, the proposed surface structure could change a naturally-hydrophilic surface to near-superhydrophobic. Geometrical light trapping effects were enabled and the antireflection property could be significantly enhanced (>80% less reflection) by the proposed hierarchical surface structures. Experimental results implied the great potential of the proposed surface structures for various applications such as microfluidics, optics, energy, and interfaces.

Building pose estimation from the perspective of UAVs based on CNNs

2021 ◽  
pp. 2150003
Author(s):  
Zhenni Wu ◽  
Hengxin Chen ◽  
Bin Fang ◽  
Zihao Li ◽  
Xinrun Chen
Keyword(s):  
Neural Network ◽  
Pose Estimation ◽  
Computer Technology ◽  
Architectural Design ◽  
Rapid Development ◽  
Angle Error ◽  
Building Model ◽  
Building Models ◽  
World Coordinate System ◽  
Aerial Vehicle

With the rapid development of computer technology, building pose estimation combined with Augmented Reality (AR) can play a crucial role in the field of urban planning and architectural design. For example, a virtual building model can be placed into a realistic scenario acquired by a Unmanned Aerial Vehicle (UAV) to visually observe whether the building can integrate well with its surroundings, thus optimizing the design of the building. In the work, we contribute a building dataset for pose estimation named BD3D. To obtain accurate building pose, we use a physical camera which can simulate realistic cameras in Unity3D to simulate UAVs perspective and use virtual building models as objects. We propose a novel neural network that combines MultiBin module with PoseNet architecture to estimate the building pose. Sometimes, the building is symmetry and ambiguity causes its different surfaces to have similar features, making it difficult for CNNs to learn the differential features between the different surfaces. We propose a generalized world coordinate system repositioning strategy to deal with it. We evaluate our network with the strategy on BD3D, and the angle error is reduced to [Formula: see text] from [Formula: see text]. Code and dataset have been made available at: https://github.com/JellyFive/Building-pose-estimation-from-the-perspective-of-UAVs-based-on-CNNs .

scholarly journals A Three-Dimensional Simulation of Particle Distribution in a Separator and Structure Optimization with the Statistical Approach of Taguchi Method

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Jinjin Liu ◽  
Kai Liu ◽  
Tong Zhao ◽  
Zhuofei Xu
Keyword(s):  
Taguchi Method ◽  
Three Dimensional ◽  
Optimal Solution ◽  
Structure Design ◽  
Dust Particles ◽  
Surface Element ◽  
Phase Method ◽  
Discrete Phase ◽  
Distribution Uniformity ◽  
Dimensional Simulation

A three-dimensional numerical simulation combining discrete phase method (DPM) and porous media based on the theory of Euler-Lagrange has been employed to investigate particles distribution in a separator. The DPM model is applied to monitor the movement of individual particles and calculate the contact force between them in the separator. The simulation results display the migration feature of dust particles over time and the distribution of particles on the surface element in porous region and reveal that the flow field influences the distribution uniformity of the particles in porous area directly. Based on the analysis, the structure of separator is optimized by the Taguchi method. An orthogonal relation motion has been established. The optimal solution is achieved by the calculation of the weight relationship. The calculated optimal structure is evaluated by the signal to noise (SNR). The result reveals that the values of SNR in case are eligible. As a result, the research of the separator points out a useful and improvable method for the parameter optimization of structure design.

scholarly journals Virtual Reality As A Spatial Experience For Architecture Design: A Study of Effectiveness for Architecture Students

2018 ◽  
Vol 41 ◽  
pp. 05005
Author(s):  
Luhur Sapto Pamungkas ◽  
Cinthyaningtyas Meytasari ◽  
Hendro Trieddiantoro
Keyword(s):  
Virtual Reality ◽  
Experimental Method ◽  
Architectural Design ◽  
Design Thinking ◽  
Three Dimensional ◽  
Visual Design ◽  
Primary Data ◽  
Design Studio ◽  
Spatial Experience ◽  
Architectural Design Studio

Studios. This ability gained through visual design thinking. The spatial experience honed by three dimensional thinking from the medium diversity. The spatial experience learned through a room layout, proportion, and composition. This research used an experimental method and the primary data obtained by a “Likert” scale questionnaire. The Respondents are 50 students of the Architectural Design Studio. Moreover, the analysis focuses on the VR for spatial experience. The result was a descriptive explanation of the effectiveness of Virtual Reality for a spatial experience of architecture students at Technology University of Yogyakarta.

scholarly journals 宋人詠寫王荊公之主題形象與修辭探論

2019 ◽  
Vol 34 (34) ◽  
pp. 065-098
Author(s):  
鍾志偉 鍾志偉
Keyword(s):  
Song Dynasty ◽  
Three Dimensional ◽  
Structure Design ◽  
The Song Dynasty ◽  
Time Space ◽  
New Meanings ◽  
New Learning ◽  
Negative Comments ◽  
The Common ◽  
One And Many

<p>歷代評價王荊公，兼有毀譽，尤以史傳、筆記、小說最多，建構起荊公立體形象。然而，詩歌亦屬王荊公故事詠寫系統主要體裁之一，至今無專文探討。本文借用詠史懷古詩之研究方法，觀察詩人對荊公之人物論定，回到形象聚訟之始，勾勒宋詩中之荊公形象與主體。可以發現詩中呈現宰相忠業及宋亡罪人之迥異面向。其次，歸納分析詠寫荊公之慣用素材與主題思想，如營造挽歌氛圍與世態炎涼之感慨；速寫讀書堂與嘲弄新學；關注書畫題詠與追慕風神等，最後探討宋人詠寫荊公之詩學設計，一則見詩人慣以一多對立及時空伸縮為篇章構思，有助興發感慨；二則融入荊公詩字句，翻新原典，借彼抒己。總此，讓荊公形象顯影在宋詩上，為荊公之歷史評騭提供初始依據。</p> <p>&nbsp;</p><p>The evaluations of past generations on Sir Wang Jing, mostly in historical biographies, jottings, and short stories, lead to both positive and negative comments and have established a three-dimensional image of Sir Jing. However, there is yet no monograph on poetry, which is also one of the important genres in the writing system of stories about Sir Wang Jing. This article attempts to explore the discussions of figures in history-themed poems and to return to the beginning of the arguments on Sir Jing&rsquo;s image and depict the image of him portrayed in Song poems. First, it discovers the polarized identity, as a prime minister with loyalty or a guilty person causing the ruin of the Song dynasty. Second, it organizes and analyzes the common materials and theme thoughts in writings about Sir Jing, such as creating atmosphere of elegies around tombs and shrines and fickleness of the world, sketching the reading hall and mocking new learning, and paying attention to inscriptions of calligraphic works and paintings and admiration for the past manner. Finally, it probes into the rhetoric of Song people&rsquo;s writings about Sir Jing. For example, the structure design of opposition between one and many and expansion and contraction of time-space helps to highlight the effect of sighs with emotions. To give another example, the adjusted use of the words of Sir Jing&rsquo;s poems adds new meanings to their original meanings. To sum up, this article exhibits vividly on paper the Sir Jing in Song poems and provides a reference for studies on the image of Sir Wang Jing shaped by history.</p> <p>&nbsp;</p>

Non-Linear Dynamic Magneto Electric Effects in Ferromagnetic-Ferroelectric Layered Composites

2013 ◽  
Author(s):  
Satenik Harutyunyan ◽  
Davresh Hasanyan
Keyword(s):  
Vibration Frequency ◽  
Strain Distribution ◽  
Longitudinal Vibration ◽  
Three Dimensional ◽  
Low Frequency ◽  
Structure Design ◽  
Experimental Results ◽  
Physical Parameters ◽  
Wide Range ◽  
Non Linear

A non-linear theoretical model including bending and longitudinal vibration effects was developed for predicting the magneto electric (ME) effects in a laminate bar composite structure consisting of magnetostrictive and piezoelectric multi-layers. If the magnitude of the applied field increases, the deflection rapidly increases and the difference between experimental results and linear predictions becomes large. However, the nonlinear predictions based on the present model well agree with the experimental results within a wide range of applied electric field. The results of the analysis are believed to be useful for materials selection and actuator structure design of actuator in actuator fabrication. It is shown that the problem for bars of symmetrical structure is not divided into a plane problem and a bending problem. A way of simplifying the solution of the problem is found by an asymptotic method. After solving the problem for a laminated bar, formula that enable one to change from one-dimensional required quantities to three dimensional quantities are obtained. The derived analytical expression for ME coefficients depend on vibration frequency and other geometrical and physical parameters of laminated composites. Parametric studies are presented to evaluate the influences of material properties and geometries on strain distribution and the ME coefficient. Analytical expressions indicate that the vibration frequency strongly influences the strain distribution in the laminates, and that these effects strongly influence the ME coefficients. It is shown that for certain values of vibration frequency (resonance frequency), the ME coefficient becomes infinity; as a particular case, low frequency ME coefficient were derived as well.

Research of Technology of Virtual Building and Scene Roaming by Visual Basic

2012 ◽  
Vol 490-495 ◽  
pp. 2333-2336
Author(s):  
Man Yu Zhang ◽  
Wei Min Zhao
Keyword(s):  
Virtual Reality ◽  
Computer Graphics ◽  
Computer Technology ◽  
Three Dimensional ◽  
Visual Basic ◽  
Virtual Reality Technology ◽  
Virtual Scene ◽  
Dimensional Simulation

Recently, the computer technology, especially computer graphics, networks, multimedia, three dimensional simulation developments, injected virtual reality technology with new vitality, which also give 3D virtual scene a direction. The article mainly discusses technology of virtual building scenery, application in today's independent virtual building scene’s deficiency, and the integration of 3D virtual reality, locality and perspective advantages.

Sign in / Sign up

Export Citation Format

Share Document