|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Hermite variational implicit surface reconstruction显示文摘We propose a new technique for reconstructing surfaces from a large set of unorganized 3D data points and their associated normal vectors. The surface is represented as the zero level set of an implicit vol-ume model which fits the data points and normal constraints. Compared with variational implicit sur-faces,we make use of surface normal vectors at data points directly in the implicit model and avoid of introducing manufactured off-surface points. Given n surface point/normal pairs,the proposed method only needs to solve an n×n positive definite linear system. It allows fitting large datasets effectively and robustly. We demonstrate the performance of the proposed method with both globally supported and compactly supported radial basis functions on several datasets. | PAN RongJiang MENG XiangXu WHANGBO TaegKeun | 2009 | Science in China(Series F)2009，52，2： | 5 |
| 2 | Expressive line drawings of human faces from range images显示文摘We propose a novel technique to extract features from a range image and use them to produce a 3D pen-and-ink style portrait similar to a traditional artistic drawing. Unlike most previous template-based,component-based or example-based face sketching methods,which work from a frontal photograph as input,our system uses a range image as input. Our method runs in real-time for models of moderate complexity,allowing the pose and drawing style to be modified interactively. Portrait drawing in our system makes use of occluding contours and suggestive contours as the most important shape cues. However,current 3D feature line detection methods require a smooth mesh and cannot be reliably applied directly to noisy range images. We thus present an improved silhouette line detection algorithm. Feature edges related to the significant parts of a face are extracted from the range image,connected,and smoothed,allowing us to construct chains of line paths which can then be rendered as desired. We also incorporate various portrait-drawing principles to provide several simple yet effective non-photorealistic portrait renderers such as a pen-and-ink shader,a hatch shader and a sketch shader. These are able to generate various life-like impressions in different styles from a user-chosen viewpoint. To obtain satisfactory results,we refine rendered output by smoothing changes in line thickness and opacity. We are careful to provide appropriate visual cues to enhance the viewer’s comprehension of the human face. Our experimental results demonstrate the robustness and effectiveness of our approach,and further suggest that our approach can be extended to other 3D geometric objects. | HUANG YueZhu MARTIN Ralph R. ROSIN Paul L. MENG XiangXu YANG ChengLei | 2009 | Science in China(Series F)2009，52，2： | 2 |
| 3 | Advances in research of mammalian vomeronasal pheromone perception and genetic components unique to vomeronasal signal transduction pathway显示文摘The recognition and perception of chemical signals from environments are very important for the survival of organisms.In mammals,general chemical signals are mainly detected by the main olfactory system (MOS),while pheromones are primarily perceived by the vomeronasal system (VNS).Pheromones are chemicals released and recognized by individuals within the same species,which then induce physiological and behavioral changes in social and sexual activities.In this review,we focus on the recent advances on research in mammalian vomeronasal pheromone perception and those genetic components unique to vomeronasal signal transduction pathway,including vomeronasal receptor V1R and V2R gene families as well as transient receptor potential channel 2 gene (TRPC2),trying to shed light on further study of the molecular mechanisms of mammalian pheromone perception. | YANG Hui MENG XiangXue YU Li JIN Wei ZHANG Xin ZHANG YaPing | 2010 | Chinese Science Bulletin2010，55，23： | 2 |
| 4 | ASaaSI: an approved architecture for SaaS service composition显示文摘 | Jiao YuChang Liu Shijun Meng Xiangxu | 2010 | In- ternational Journal of Computer Applications in Technolo- gy2010，38，123： | 1 |
| 5 | Parametric design method based ona directed acyclic hyper graph and object oriented technology显示文摘 | Ma Cuixia Meng Xiangxu | 2000 | Proceedings of the World Congress on Intelligent Controland Automation(WCICA)2000，4，7： | 1 |
| 6 | Anisotropic resizing and deformation preserving geometric textures显示文摘Model resizing is a useful technique for model reuse. Non-homogeneous model resizing introduced by Kraevoy et al. is able to preserve important geometric features during anisotropic scaling. However, many practical objects contain various geometric textures. Different from similar objects without geometric textures, such objects seem to be extremely difficult for resizing even if the underlying surfaces are relatively simple. In this paper, we present an automatic model resizing method based on geometric texture transfer. Geometric textures are separated from the underlying surfaces and reconstructed on the non-homogenously scaled surfaces using geometric texture synthesis. By utilizing the natural correspondence between the surfaces before and after resizing, surfaces with multiple geometric textures can be resized and geometric texture recovered automatically. Experimental results show that our method effectively and automatically preserves geometric textures during the model resizing process. Our method can also easily be used in general deformation process. | CHEN Lin & MENG XiangXu School of Computer Science and Technology, Shandong University, Jinan 250101, China | 2010 | Science China(Information Sciences)2010，53，12： | 1 |
| 7 | Designing and deploying a mixed-reality aquarium for cognitive training of young children with autism spectrum disorder显示文摘Autism spectrum disorder(ASD),a developmental disorder severely affecting cognition and social behavior,is increasing in prevalence[1].This increasing trend is especially severe in children,making the early intervention crucial to ASD treatment.Children with ASD have been found impairments in several aspects of cognition functions. | Juan LIU Yulong BIAN Yanran YUAN Yuting XI Wenxiu GENG Xinpei JIN Wei GAI Xiangmin FAN Feng TIAN Xiangxu MENG Chenglei YANG | 2021 | Science China(Information Sciences)2021，64，5： | 1 |
| 8 | A Real-Time Pedestrian Social Distancing Risk Alert System for COVID-19显示文摘The COVID-19 virus is usually spread by small droplets when talking,coughing and sneezing,so maintaining physical distance between people is necessary to slow the spread of the virus.The World Health Organization(WHO)recommends maintaining a social distance of at least six feet.In this paper,we developed a real-time pedestrian social distance risk alert system for COVID-19,whichmonitors the distance between people in real-time via video streaming and provides risk alerts to the person in charge,thus avoiding the problem of too close social distance between pedestrians in public places.We design a lightweight convolutional neural network architecture to detect the distance between people more accurately.In addition,due to the limitation of camera placement,the previous algorithm based on flat view is not applicable to the social distance calculation for cameras,so we designed and developed a perspective conversion module to reduce the image in the video to a bird’s eye view,which can avoid the error caused by the elevation view and thus provide accurate risk indication to the user.We selected images containing only person labels in theCOCO2017 dataset to train our networkmodel.The experimental results show that our network model achieves 82.3%detection accuracy and performs significantly better than other mainstream network architectures in the three metrics of Recall,Precision and mAP,proving the effectiveness of our system and the efficiency of our technology. | Zhihan Liu Xiang Li Siqi Liu Wei Li Xiangxu Meng Jing Jia | 2023 | Computer Systems Science & Engineering2023，47，10： | 0 |
| 9 | Artemin对胰腺癌细胞系MIA PaCa-2浸润能力的研究(英文)显示文摘Objective:The aim of this study was to analyze the capacity of Artemin promoting the motility and invasiveness of MIA PaCa-2 pancreatic cancer (PAC) cells.Methods:The PAC cell line MIA PaCa-2 was cultured in vitro and studied using Transwell chamber analysis.The motility and invasiveness ability affected by different concentrations of Artemin and its receptor GFRα3 were determined.Expression level of matrix metalloproteinase-2 (MMP-2),epithelial cadherin (E-cadherin) were quantitative analysis using RT-PCR and Western blot in MIA PaCa-2 cells stimulated with Artemin and receptor GFRα3.Results:MIA PaCa-2 PAC cell motility and invasiveness was significantly increased with Artemin and its receptor GFRα3 increasing concentrations than control (P<0.01).150 ng/mL was the best of both the role of concentration.MMP-2 was increased significantly (t=6.35,t=7.32),while E-cadherin was significantly lower (t=4.27,t=5.61),after affected by the 150 ng/mL Artemin and GFRα3,respectively.The difference was statistically significant compared with the control group (P<0.01).Conclusion:Artemin and its receptor GFRα3 can promote PAC cell motility and invasiveness ability and contribute to the aggressive behavior.The mechanism may be related to increased expression of MMP-2 molecule and E-cadherin down-regulation expression. | Lingxin Meng Yuhua Chi Xiangxu Wang Zhaojun Ding Ling Mou Wen Cui Yingjie Xue | 2012 | The Chinese-German Journal of Clinical Oncology2012，11，4： | 0 |
| 10 | A NEW GENERATOR FOR PARAMETRIC DRAFTING PROGRAM显示文摘In this paper a new generator for parametric drafting program is presented.The func-tions and the syntax of the parametric drafting program are described.This software has been suc-cessfully used to generate a parametric drafting program for designs of motors. | MENG Xiangxu WANG Jiaye YANG Xingqiang Department of Computer Science Shandong University Jinan,Shandong,P.R.China | 1992 | Computer Aided Drafting,Design and Manufacturing1992，3，1： | 0 |
| 11 | Stylized strokes for coherent line drawings显示文摘Temporal coherence is one of the central challenges for rendering a stylized line. It is especially difficult for stylized contours of coarse meshes or nonuniformly sampled models, because those contours are polygonal feature edges on the models with no continuous correspondences between frames. We describe a novel and simple technique for constructing a 2D brush path along a 3D contour. We also introduce a 3D parameter propagation and re-parameterization procedure to construct stroke paths along the 2D brush path to draw coherently stylized feature lines with a wide range of styles. Our method runs in real-time for coarse or non-uniformly sampled models, making it suitable for interactive applications needing temporal coherence. | Liming Lou Lu Wang Xiangxu Meng | 2015 | Computational Visual Media2015，1，1： | 0 |
| 12 | A New Image Segmentation for Virtual Background Reconstruction显示文摘 | CAI Xun MENG Xiangxu CAI Fei JIANG Long | 2008 | Chinese Journal of Electronics2008，17，2： | 0 |
| 13 | Research on Linux Kernel Version Diversity for Precise Memory Analysis显示文摘The diversity of Linux versions brings challenges to Linux memory analysis,which is an established technique in security and forensic investigations.During memory forensics,kernel data structures are essential information.Existing solutions obtain this information by analyzing debugging information or by decompiling kernel functions to handle a certain range of versions.In this paper,by collecting and analyzing a number of Linux versions,we characterize the properties of different Linux kernel versions and how struct offsets change between versions.Furthermore,the Linux kernel provides over 10,000 configurable features,which leads to different kernel structure layouts for the same kernel version.To deal with this problem,we propose a method of identifying kernel struct layout based on brute-force matching.By examining the relationships between kernel structures,common features are extracted and exploited for brute-force matching.The experimental results show that the proposed technology can deduce structure member offsets accurately and efficiently. | Shuhui Zhang Xiangxu Meng Lianhai Wang Guangqi Liu | 2017 | 国际计算机前沿大会会议论文集2017，，1： | 0 |
| 14 | EZCalm:A User Emotion Regulation System by Immersive Music Based on Plutchik's Wheel of Emotions显示文摘Nowadays,many companies hire professional trainers to keep their employees emotionally positive.In addition,more and more people are visiting psychological doctors to adjust their emotion,in order to treat mental illness or gain sense of happiness.All kinds of people mentioned above want to adjust emotions in an effective way.Therefore,a simple and effective household pattern of emotion adjustment is particularly important for people to use in common days.For such a pattern,an emotion regulation pattern combined with Plutchiks' wheel of emotions is proposed for emotion adjustment.In order to enhance the effectiveness of emotion adjustment from both the vision channel and the hearing channel,we adjust the user's emotion by visualizing music on a Helmet mounted display(HMD)device.Findings demonstrate that the proposed system can calm down participants e'motions effectively. | Yajie Xu Lu Wang Yulin Wang Jiyue Hu Peng Shao Yijia Ma Xiangxu Meng | 2019 | Journal of Beijing Institute of Technology2019，28，1： | 0 |
| 15 | Recent advances in glinty appearance rendering显示文摘The interaction between light and materials is key to physically-based realistic rendering.However,it is also complex to analyze,especially when the materials contain a large number of details and thus exhibit'glinty'visual effects.Recent methods of producing glinty appearance are expected to be important in next-generation computer graphics.We provide here a comprehensive survey on recent glinty appearance rendering.We start with a definition of glinty appearance based on microfacet theory,and then summarize research works in terms of representation and practical rendering.We have implemented typical methods using our unified platform and compare them in terms of visual effects,rendering speed,and memory consumption.Finally,we briefly discuss limitations and future research directions.We hope our analysis,implementations,and comparisons will provide insight for readers hoping to choose suitable methods for applications,or carry out research. | Junqiu Zhu Sizhe Zhao Yanning Xu Xiangxu Meng Lu Wang Ling-Qi Yan | 2022 | Computational Visual Media2022，8，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员