Development of a building information model-guided post-earthquake building inspection framework using 3D synthetic environments

Computer vision-based inspection methods show promise for automating post-earthquake building inspections.These methods survey a building with unmanned aerial vehicles and automatically detect damage in the collected images.Nevertheless,assessing the damage′s impact on structural safety requires localizing damage to specific building components with known design and function.This paper proposes a BIM-based automated inspection framework to provide context for visual surveys.A deep learning-based semantic segmentation algorithm is trained to automatically identify damage in images.The BIM automatically associates any identified damage with specific building components.Then,components are classified into damage states consistent with component fragility models for integration with a structural analysis.To demonstrate the framework,methods are developed to photorealistically simulate severe structural damage in a synthetic computer graphics environment.A graphics model of a real building in Urbana,Illinois,is generated to test the framework;the model is integrated with a structural analysis to apply earthquake damage in a physically realistic manner.A simulated UAV survey is flown of the graphics model and the framework is applied.The method achieves high accuracy in assigning damage states to visible structural components.This assignment enables integration with a performance-based earthquake assessment to classify building safety.

Graphic Processing Unit-Accelerated Mutual Information-Based 3D Image Rigid Registration

Mutual information （MI）-based image registration is effective in registering medical images, but it is computationally expensive. This paper accelerates MI-based image registration by dividing computation of mutual information into spatial transformation and histogram-based calculation, and performing 3D spatial transformation and trilinear interpolation on graphic processing unit （GPU）. The 3D floating image is downloaded to GPU as flat 3D texture, and then fetched and interpolated for each new voxel location in fragment shader. The transformed resuits are rendered to textures by using frame buffer object （FBO） extension, and then read to the main memory used for the remaining computation on CPU. Experimental results show that GPU-accelerated method can achieve speedup about an order of magnitude with better registration result compared with the software implementation on a single-core CPU.

Research on Dynamic Graphic Features in Digital Media Interfaces

In digital media interfaces,dynamic graphics integrate elements of animation design,graphic design,and cinematic language,presenting in various forms and demonstrating significant inclusivity.From the perspective of visual cognition,by capturing dynamic graphics within the interface,three-dimensional information such as time and space is acquired,and the cognition process exhibits characteristics of spatial and temporal correlation.In terms of information cognition,dynamic representation fragments information,resulting in a sense of discontinuity and intermittent memory.The efficiency of information cognition and transmission is enhanced through the coordination of audio,video,and other elements.In aesthetic perception,with the rise of Internet culture,people’s aesthetic perceptions towards dynamic graphic design have evolved,showcasing a generalization of form and the instantaneous nature of content.Technically,the complexity of design and the diversity of applications have established dynamic graphics as a typical design style label in digital media interfaces.

Eco－environmental information system of Tianjin City─Design，implementation and applications

This paper describes the design, implementation and applications of theeco-environmental information system in Tianjin City, which is the kernel of the decision support sys-tem for urban eco-environmental regulation (DSSUER) The design of this information system isbased on the analysis of the requirements of users. The system features that it has expendability,maintainability and universality, makes data be shared between different components of DSSUERand provides help facilities and protection. The system is built by using database and graphic basetechnologies it consists of the main control module, data-management module and data-proassingniodule. The applications of this system is demonstrated by an example which is the case ofsuitability analysis of land use for residential areas in Tianjin.

PS-G-GERT Effectiveness Evaluation Model of Link-Based GEO Satellite Communication Constellation under Poor Information Background

The effectiveness evaluation of GEO satellite communication constellation not only characterizes the communication capability of the constellation but also provides a basis for optimizing the constellation structure.Whether due to information poverty or the complexity of the system,the impact of uncertain information on the effectiveness evaluation needs to be considered to ensure the accuracy of the evaluation results.To address this issue,this paper develops a model for evaluating the GEO satellite communication constellation’s effectiveness in the context of poor information.Firstly,it analyses the GEO satellite communication constellation plus system based on communication links with an in-depth analysis of the constellation structure.Secondly,an equivalent transfer function algorithm based on the characteristic function and transfer probability is proposed with the help of graphical evaluation and review technique.Then,by analyzing the communication link importance connotation,the algorithm formula of communication link effectiveness and its importance is derived,and the constellation effectiveness and variance are found.Finally,the model constructed in this paper is used to evaluate the effectiveness of a GEO satellite communication constellation,further verifying the accuracy and validity of the model.Through comparative analysis,it is shown that the model can not only solving the effectiveness of the constellation but also analyzing the variation of its effectiveness.It lays a theoretical foundation for the analysis and optimization of the GEO satellite communication constellation effectiveness.

社区垃圾分类的科普信息可视化设计策略研究

以可持续发展城市文化建设为视野,探索社区垃圾分类信息可视化的价值和设计原则与策略。通过对社区垃圾分类科普信息可视化的优势分析提出社区垃圾分类科普信息可视化设计优化策略;从文字、图形、色彩、版式设计4个方面,建立基本设计原则,通过情景化设计语言提升获取信息的效率。使垃圾分类科普知识更加直观、清晰地通过视觉化的方式展现,提升公众垃圾分类的知识完整度。清晰易懂的可视化系统更好地指导了大众进行垃圾分类,增强环保意识,为城市社区垃圾分类的科普宣传提供新方法。

基于九屏幕法的计算机绘图相似辨识方法研究

为了制止学生使用AutoCAD绘图在各类教学中的诸多图形相似行为,在TRIZ的九屏幕法启发下,提出基于AutoCAD绘图过程的相似辨识方法。利用ObjectARX开发了学生端记录辨识图形相似的特征信息插件,基于Python、Django、MySQL等开发了B/S模式的教师端图形相似辨识系统。先通过九屏幕法对问题进行分析,得到解决问题的资源;其次,分析学生绘图过程的产生相似图形的绘图方式;再次,分析这些绘图方式所引起的特征信息变化;然后,利用开发的插件将特征信息存入数据库;最后,使用这些特征信息来进行相似图档的辨识。通过教学实践表明这套方法可以有效制止学生图形相似,显著提高计算机绘图的教学效果。

论动态图形对朱子文化信息传达的研究

动态图形是集文字、图片、动画与声音为一体的数字载体和数字媒介。通过对动态图形的概述,分析在数字时代背景下朱子文化研究的现状,提出利用动态图形对朱子文化信息进行传达,分别从传达主体、传达符码、传达媒介、传达意义几个方面分别进行论述,构建朱子文化信息传达的新范式。

融合GPU的拟单层覆盖近似集计算方法

拟单层覆盖粗糙集是一种匹配集值信息系统且有高质量和高效率的粗糙集模型。拟单层覆盖近似集的计算过程中存在大量计算密集且逻辑简单的运算,为此,提出拟单层覆盖近似集的矩阵化表示方法,以利用图形处理器(GPU)强大的计算性能加速计算过程。为了实现这一目标,使用布尔矩阵表示拟单层覆盖近似空间中的元素,引入与集合运算对应的布尔矩阵算子,提出拟单层覆盖粗糙近似集(DE、DA、DE0与DA0)的矩阵表示,并设计矩阵化拟单层覆盖近似集算法(M_SMC)。同时,相应的定理证明了拟单层覆盖近似集的矩阵表示形式与原始定义的等价性。然而,M_SMC运行过程中出现了矩阵存储和计算步骤的内存消耗过多问题。为了将算法部署到显存有限的GPU上,优化矩阵存储和计算步骤,提出分批处理的矩阵化拟单层覆盖近似集算法(BM_SMC)。在10个数据集上的实验结果表明,融合GPU的BM_SMC算法与单纯使用中央处理器(CPU)的BM_SMC算法相比计算效率提高2.16~11.3倍,BM_SMC算法可以在有限的存储空间条件下充分利用GPU,能够有效地提高拟单层覆盖近似集的计算效率。

面向新工科的产品几何信息表达课程教学改革与实践

针对现代设计及加工方法对工程制图类课程提出的新要求,在机械创新班试点开设产品几何信息表达课程,以工程制图为基础,融合三维构形表达和基于模型定义技术,构建出一整套面向新工科的课程教学体系、教学模式及考核方式,满足学生自主学习、全面发展的需求。

浅析信息图形设计在数字化媒体中的应用

社会在不断的发展,时代在不停地进步,我们越来越感受到媒体的传播速度趋向于简短化和动态化,人们开始更喜欢短视频的信息呈现模式,喜欢看到更加个性和特别的信息传输方式,如今的信息传递也开始从静态化传播向动态化传播转变。这种改革是顺应数字媒体的发展趋势,符合更多人的要求,设计者必须详细了解信息图形,找到更加科学的设计途径和方式,使数字经济化的发展前景更加开阔。

以图查房时空数据模型研究与应用

目前不动产登记信息查询应用主要是面向权利人和利害关系人且是有条件的查询,其他广大群众还难以快速获取不动产登记基本信息,导致在房屋交易中存在信息不对称风险,有必要从技术层面研究加强不动产登记信息公开查询的办法。本文在分析省级不动产登记数据现状、顾及信息安全的基础上,研究设计了以图查房时空数据模型。基于此模型,开发了面向自然人的图查房服务,在广东省域范围进行了应用,验证了本文设计的以图查房时空数据模型有效可行。

新媒体背景下视觉传达设计的跨媒介表现探析

在新媒体背景下,跨媒介表现是评估视觉传达设计质量的关键指标。传统媒介与基于数字化或互联网的新媒介在承载视觉传达设计要素、展现表现力方面具有不同的特点。相较于传统媒介,新媒介能够承载更多视觉设计元素,具有更多的表现形式及更强的表现力。其中,基于跨媒介信息传播的视觉传达设计本质上是一种多媒介融合设计,其跨媒介表现对设计表达具有至关重要的意义。

城市地名文化地图表达设计

针对当前城市地名文化地图设计与研究的不足,本文以地图与地名文化的创新性融合表达为研究目标,以《寻迹汉阳地名之美——汉阳区划地名文化手绘图》的设计与实现为案例,将确定文化主题、提炼城市地名文化、文化信息图形化等融入传统制图的技术框架,构建了手绘地图与传统地图编制相结合的文化地图编绘工艺,从确定主题内容、地图表达设计、地图装帧三个方面详细阐述城市地名文化地图编绘的具体步骤,以期为城市地名文化地图的设计提供参考。

基于GPU和角正交投影视图的多视角投影全息图

针对多视角投影全息图生成速度慢的问题,提出一种基于计算机图形处理单元(graphics processing unit,GPU)的多视角投影计算全息图合成方法.获取多个角正交投影视图,充分利用GPU强大的并行计算能力,同时计算多幅投影视图对全息图的作用,即在计算过程中同时将沿着投影方向移位后的一系列角正交投影视图乘以其相应的常数相位因子.其中,每个投影图像的投影角决定了其移位的距离和常数相位因子.将所有并行计算结果累加,可以得到一个包含物体三维信息的二维复矩阵,即菲涅尔全息图.相较于使用计算机中央处理器(central processing unit,CPU)进行计算,本方法显著提升了计算速度,将计算效率提高了30~40倍,为多视角投影全息图的高效生成提供一种可行途径.

基于故宫博物院数字文物库的信息可视化研究——以“故宫文物医院”为例

当前社会处于数字技术的大背景下,文物的展示方式日趋多元化。文章根据信息可视化的呈现规律和方式,对“故宫文物医院”信息设计进行案例分析。该作品制作了简单易懂的图表,将庞大和繁复的文物信息进行了缕析,以信息图解的方式呈现给受众。设计采用了插图、统计表、图表相结合并手绘还原了整个文物修复过程,方便读者快速理解文物修复相关知识,使人充分感受文物修复在传统文化中所具有的审美、文化和社会价值,有效地促进了人们对传统文化的认同感和归属感,激发受众对文物的关注和喜爱。

图形创意在老北京布鞋包装设计中的运用研究

为提升老北京布鞋在市场中的品牌认知度和影响力,探究图形创意在老北京布鞋包装设计中的运用,提出了基于图形创意的老北京布鞋包装设计。针对老北京布鞋包装设计的现状进行分析,提出引入图形创意的概念和手法以提升老北京布鞋包装设计的效能。深入探讨图形创意在包装设计中的重要性,提升品牌形象,突出产品特性,直观传递信息,以及体现时代特征。经过实践验证,图形创意的运用使得老北京布鞋包装设计更具创新性和吸引力。通过巧妙地运用图案、花纹等元素,包装设计呈现出丰富的层次感和视觉效果,使产品更加引人注目。这些策略增强了老北京布鞋的品牌识别性,进一步满足不同群体的需求,为其提高竞争力提供了新的思路。

基于GIS的煤矿地质测量信息数据模型研究

该文从煤矿地质测量的基础工作入手,探究面向GIS的煤矿地质测量信息数据模型构建方法。通过煤矿地质基础工作、煤矿测量基础工作和水文地质基础工作收集海量的测量信息,构建煤矿地质测量信息的概念数据模型和逻辑数据模型。以数据模型为基础,融合信息分类与编码技术,设计煤矿地质测量空间信息系统(MSGIS),用点、线、面这些基本图素直观简洁地表示测量信息,准确形象地描述矿区地质模型,进一步提高系统的易用性和实用性。