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A visual analysis approach for data imputation via multi-party tabular data correlation strategies

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Frontiers of Information Technology & Electronic Engineering 2024年第3期25卷 398-414页

作者： Haiyang ZHU Dongming HAN Jiacheng PAN Yating WEI Yingchaojie FENG Luoxuan WENG Ketian MAO Yuankai XING Jianshu LV Qiucheng WAN Wei CHEN The state key lab.of cad&cg Zhejiang UniversityHangzhou 310058China Wuchan Zhongda Digital Technology Co. Ltd.Hangzhou 310020China Zhejiang Metals and Materials Co. Ltd.Hangzhou 310005China

Data imputation is an essential pre-processing task for data governance,aimed at filling in incomplete ***,conventional data imputation methods can only partly alleviate data incompleteness using isolated tabular data,and they fail to achieve the best balance between accuracy and *** this paper,we present a novel visual analysis approach for data *** develop a multi-party tabular data association strategy that uses intelligent algorithms to identify similar columns and establish column correlations across multiple ***,we perform the initial imputation of incomplete data using correlated data entries from other ***,we develop a visual analysis system to refine data imputation *** interactive system combines the multi-party data imputation approach with expert knowledge,allowing for a better understanding of the relational structure of the *** significantly enhances the accuracy and eficiency of data imputation,thereby enhancing the quality of data governance and the intrinsic value of data *** validation and user surveys demonstrate that this method supports users in verifying and judging the associated columns and similar rows using theirdomain knowledge.

关键词： Data governance Data incompleteness Data imputation Data visualization Interactive visual analysis

Empowering smart city situational awareness via big mobile data

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Frontiers of Information Technology & Electronic Engineering 2024年第2期25卷 286-307页

作者： Zhiguang SHAN Lei SHI Bo LI Yanqiang ZHANG Xiatian ZHANG Wei CHEN state Information Center Beijing100045China School of Computer Science and Engineering Beihang UniversityBeijing100191China Zhongguancun lab.ratory Beijing100094China Beijing Tendcloud Tianxia Technology Co. Ltd.Beijing100027China The state key lab.of cad&cg Zhejiang UniversityHangzhou310027China

Smart city situational awareness has recently emerged as a hot topic in research societies,industries,and governments because of its potential to integrate cutting-edge information technology and solve urgent challenges that modern cities *** example,in the latest five-year plan,the Chinese government has highlighted the demand to empower smart city management with new technologies such as big data and Internet of Things,for which situational awareness is normally the crucial first *** traditional static surveillance data on cities have been availab.e for decades,this review reports a type of relatively new yet highly important urban data source,i.e.,the big mobile data collected by devices with various levels of mobility representing the movement and distribution of public and private agents in the *** especially focus on smart city situational awareness enabled by synthesizing the localization of hundreds of thousands of mobile software Apps using the Global Positioning System(GPS).This technique enjoys advantages such as a large penetration rate(∼50%urban population covered),uniform spatiotemporal coverage,and high localization *** first discuss the pragmatic requirements for smart city situational awareness and the challenges *** we introduce two suites of empowering technologies that help fulfill the requirements of(1)cybersecurity insurance for smart cities and(2)spatiotemporal modeling and visualization for situational awareness,both via big mobile *** main contributions of this review lie in the description of a comprehensive technological framework for smart city situational awareness and the demonstration of its feasibility via real-world applications.

关键词： Smart city Mobile data Situational awareness

Computational Approaches for Traditional Chinese Painting: From the “Six Principles of Painting” Perspective

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Journal of Computer Science & Technology 2024年第2期39卷 269-285页

作者：张玮张建伟黄锦畦王懿芳封颖超杰王璐玮陈为 state key lab.ratory of cad&cg Zhejiang UniversityHangzhou 310058China Department of Computer Science and Engineering The Hong Kong University of Science and Technology Hong Kong 999077China Kellogg School of Management Northwestern UniversityEvanston 60208U.S.A lab.ratory of Art and Archaeology Image Zhejiang UniversityHangzhou 310058China

Traditional Chinese painting(TCP)is an invaluable cultural heritage resource and a unique visual art *** recent years,there has been a growing emphasis on the digitalization of TCP for cultural preservation and *** resulting digital copies have enabled the advancement of computational methods for a structured and systematic understanding of *** explore this topic,we conduct an in-depth analysis of 94 pieces of *** examine the current use of computer technologies on TCP from three perspectives,based on numerous conversations with ***,in light of the“Six Principles of Painting”theory,we categorize the articles according to their research focus on artistic ***,we create a four-stage framework to illustrate the purposes of TCP ***,we summarize the popular computational techniques applied to *** work also provides insights into potential applications and prospects,with professional opinion.

关键词： traditional Chinese painting(TCP) digital humanities cultural heritage computer vision deep learning

Automatic location and semantic lab.ling of landmarks on 3D human body models

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Computational Visual Media 2022年第4期8卷 553-570页

作者： Shan Luo Qitong Zhang Jieqing Feng state key lab.of cad&cg Zhejiang UniversityHangzhou 310058China

Landmarks on human body models are of great significance for applications such as digital anthropometry and clothing *** diversity of pose and shape of human body models and the semantic gap make landmarking a challenging *** paper,a learning-based method is proposed to locate landmarks on human body models by analyzing the relationship between geometric descriptors and semantic lab.ls of landmarks.A shape alignmentalgorithm is proposed to align human body models to break symmetric ambiguity.A symmetry-awaredescriptor is proposed based on the structure of the human body models,which is robust to both pose and shape variations in human body *** regression algorithm is adopted to establish the correspondence between several descriptors and semantic lab.ls of the *** and qualitative analyses and comparisons show that the proposed method can obtain more accurate landmarks and distinguish symmetrical landmarks ***,a dataset of landmarked human body models is also provided,containing 271 human body models collected from current human body datasets;each model has 17 landmarks lab.led manually.

关键词： 3D human body model descriptor land-marking shape alignment

Hybrid3D: learning 3D hybrid features with point clouds and multi-view images for point cloud registration

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Science China(Information Sciences) 2023年第7期66卷 77-93页

作者： Bangbang YANG Zhaoyang HUANG Yijin LI Han ZHOU Hongsheng LI Guofeng ZHANG Hujun BAO state key lab.of cad&cg Zhejiang University The Chinese University of Hong Kong

In recent years, point cloud registration has achieved great success by learning geometric features with deep learning techniques. However, existing approaches that rely on pure geometric context still suffer from sensor noise and geometric ambiguities(e.g., flat or symmetric structure), which limit their robustness to real-world scenes. When 3D point clouds are constructed by RGB-D cameras, we can enhance the learned features with complementary texture information from RGB images. To this end, we propose to learn a 3D hybrid feature that fully exploits the multi-view colored images and point clouds from indoor RGB-D scene scans. Specifically, to address the discrepancy of 2D-3D observations, we design to extract informative 2D features from image planes and take only these features for fusion. Then, we utilize a novel soft-fusion module to associate and fuse hybrid features in a unified space while alleviating the ambiguities of 2D-3D feature binding. Finally, we develop a self-supervised feature scoring module customized for our multi-modal hybrid features, which significantly improves the keypoint selection quality in noisy indoor scene scans. Our method shows competitive registration performance with previous methods on two real-world datasets.

关键词： point cloud registration cross-modal feature fusion multi-view feature fusion computer vision deep learning

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基于叙事结构抽象的可视分析方法综述

计算机辅助设计与图形学学报 2024年第4期36卷 503-515页

作者：叶力王磊周志光王毅刚杭州电子科技大学人文艺术与数字媒体学院杭州310018 浙江大学cad&cg国家重点实验室杭州310058

基于叙事结构抽象的可视分析方法是通过挖掘数据背后存在的叙事逻辑,提供富有洞察力和沟通力的方法.首先介绍叙事结构数据的来源,包括文本数据、图表图像数据、音视频数据、地理空间数据和多模态融合数据;然后讨论叙事结构抽象方法,包... 详细信息

基于叙事结构抽象的可视分析方法是通过挖掘数据背后存在的叙事逻辑,提供富有洞察力和沟通力的方法.首先介绍叙事结构数据的来源,包括文本数据、图表图像数据、音视频数据、地理空间数据和多模态融合数据;然后讨论叙事结构抽象方法,包括连续性、单元式和离散化3种表示;再探讨叙事结构可视化设计,包括基于视觉通道与表达形式的设计,同时介绍叙事结构交互生成方法,包括基于设计空间和注释的手动生成、AI辅助交互生成和AI自动生成;最后讨论叙事结构可视分析的创作工具以及在文化传媒、医疗健康和体育娱乐等领域的应用,并对该领域现阶段工作的不足进行总结,指出多模态融合数据可视分析、跨平台与多设备的叙事结构展示以及加强情感在叙事结构可视分析中的作用等是未来工作的研究方向.

关键词：叙事结构叙事可视化可视分析可视化创作工具

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Erratum to: A visual analysis approach for data imputation via multi-party tabular data correlation strategies

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Frontiers of Information Technology & Electronic Engineering 2024年第3期25卷 484-484页

Isogeometric Analysis-Based Topological Optimization for Heterogeneous Parametric Porous Structures

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Journal of Systems Science & Complexity 2023年第1期36卷 29-52页

作者： HU Chuanfeng HU Hui LIN Hongwei YAN Jiacong School of Mathematical Sciences State Key Lab.of CAD&CGZhejiang UniversityHangzhou 310027China

Porous structures widely exist in nature and artifacts,which can be exploited to reduce structural weight and material usage or improve damage tolerance and energy *** this study,the authors develop an approach to design optimized porous structures with Triply Periodic Minimal Surfaces(TPMSs)in the framework of isogeometric analysis(IGA)-based topological *** the developed method,by controlling the density distribution,the designed porous structures can achieve the optimal mechanical performance without increasing the usage of ***,the implicit functions of the TPMSs are adopted to design several types of porous elements ***,to reduce the cost of computation,the authors propose an equivalent method to forecast the elastic modulus of these porous elements with different ***,the relationships of different porous elements between the elastic modulus and the relative density are ***,the IGA-based porous topological optimization is developed to obtain an optimal density distribution,which solves a volume constrained compliance minimization problem based on ***,an optimum heterogeneous porous structure is generated based on the optimized density *** results demonstrate the effectiveness and efficiency of the proposed method.

关键词： B-spline solid heterogeneous porous structure isogeometric analysis topological optimization triply periodic minimal surface

Design Theory and Method of Complex Products:A Review

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Chinese Journal of Mechanical Engineering 2022年第5期35卷 1-16页

作者： Chan Qiu Jianrong Tan Zhenyu Liu Haoyang Mao Weifei Hu state key lab.ratory of cad&cg Zhejiang UniversityHangzhou 310027China

Design is a high-level and complex thinking activity of human beings,using existing knowledge and technology to solve problems and create new *** the rise and development of intelligent manufacturing,design has increasingly reflected its importance in the product life ***,the concept and connotation of complex product design is expounded systematically,and the different types of design are *** four schools of design theory are introduced,including universal design,axiomatic design,TRIZ and general *** the research status of complex product design is analyzed,such as innovative design,digital design,modular design,reliability optimization design,***,three key scientific issues worthy of research in the future are indicated,and five research trends of“newer,better,smarter,faster,and greener”are summarized,aiming to provide references for the equipment design and manufacturing industry.

关键词： Product design Design theory and method Innovative design Digital design