中国科学院机构知识库网格系统: 检索

3D DEM Simulation on the Reliquefaction Behavior of Sand Considering the Effect of Reconsolidation Degree 期刊论文 OAI收割
JOURNAL OF EARTHQUAKE ENGINEERING, 2023, 卷号: 27, 期号: 11, 页码: 2919
作者: Zhao, Teng; Ye, Jianhong

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收藏 | 浏览/下载：12/0 | 提交时间：2023/08/02

Liquefaction reliquefaction reconsolidation degree mainshock-aftershock seismic sequence fabric anisotropy Discrete Element Method (DEM)

Solution to a Forcible Version of a Graphic Sequence Problem 期刊论文 OAI收割
GRAPHS AND COMBINATORICS, 2022, 卷号: 38, 期号: 3, 页码: 9
作者: Cai, Mao-cheng; Kang, Liying

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收藏 | 浏览/下载：10/0 | 提交时间：2023/02/07

Graph Degree sequence Niessen's problem Forcible version

Phase transition on the degree sequence of a random graph process with vertex copying and deletion 期刊论文 OAI收割
STOCHASTIC PROCESSES AND THEIR APPLICATIONS, 2011, 卷号: 121, 期号: 4, 页码: 885-895
作者: Cai, Kai-Yuan; Dong, Zhao; Liu, Ke; Wu, Xian-Yuan

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收藏 | 浏览/下载：11/0 | 提交时间：2018/07/30

Degree sequence Power law Phase transition Difference equation

An improved algorithm to generate high quality progressive animation models (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Biomedical Engineering and Computer Science, ICBECS 2010, April 23, 2010 - April 25, 2010, Wuhan, China
作者: Zhao J.; Zhang S.

收藏 | 浏览/下载：24/0 | 提交时间：2013/03/25

In computer graphics investigation has been made in many years in progressive models generation to alleviate the workload of visualization processing. However most of the existing algorithms only focus on static meshes and very little works are to deal with animation models. In this paper we propose an improved method for generating progressive multiresolution animation models. By the method we first use a normal deviation parameter to improve the famous QEM method as our basic edge contraction metric to generate a base hierarchy. The sequence of the simplified models is generated progressively from the first frame to the last one. Based on the edge contraction sequence in the previous frame the contraction order in the current frame is adjusted according to the deformation degree. We demonstrate that our method works efficiently and can generate better approximations with well-preserved features than previous methods. 2010 IEEE.

A local feature based simplification method for animated mesh sequence (EI CONFERENCE) 会议论文 OAI收割
2010 2nd International Conference on Computer Engineering and Technology, ICCET 2010, April 16, 2010 - April 18, 2010, Chengdu, China
作者: Wang B.; Wang B.; Zhao J.; Zhang S.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

Although animated meshes are frequently used in numerous domains only few works have been proposed until now for simplifying such data. In this paper we propose a new method for generating progressive animated models based on local feature analysis and deformation area preservation. We propose the use of solid angle and height value for a non-hyperbolic vertex to define the local feature parameter. This local factor is embedded to the vertex quadric error matrix when calculating the edge collapse cost. In order to preserve the areas with large deformation we add deformation degree weight to the aggregated quadric errors when computing the unified edge contraction sequence. Finally a mesh optimization process is proposed to further reduce the geometric distortion for each frame. Our approach is fast easy to implement and as a result good quality dynamic approximations with well-preserved fine details can be generated at any given frame. 2010 IEEE.

A new algorithm to approximate deforming models based on torsion detection (EI CONFERENCE) 会议论文 OAI收割
2010 6th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2010, September 23, 2010 - September 25, 2010, Chengdu, China
作者: Zhang S.; Wang G.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

In this paper we propose a new method to approximate deforming models based on torsion detection. We propose the use of surface torsion to represent local features on the original model and consider it as an additional weight factor when calculating the edge contraction cost during the simplification process. The approximations of the original deforming models are generated progressively from the first frame to the last one. Based on the edge contraction sequence in the previous frame the contraction order in the current frame is adjusted according to the deformation degree. Our approach is fast easy to implement and as a result good quality approximations with well-preserved fine details can be generated at any given frame. 2010 IEEE.

On potentially Kr+1 - U-graphical Sequences 期刊论文 OAI收割
UTILITAS MATHEMATICA, 2009, 卷号: 80, 页码: 233-244
作者: Lai, Chunhui; Yan, Guiying

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收藏 | 浏览/下载：19/0 | 提交时间：2018/07/30

graph degree sequence potentially Kr+1 - U-graphic sequence potentially Kr+1 - K-3 boolean OR P-3-graphic sequence

Multiresolution animated models generation based on deformation distance analysis (EI CONFERENCE) 会议论文 OAI收割
2009 International Conference on Computer Modeling and Simulation, ICCMS 2009, February 20, 2009 - February 22, 2009, Macau, China
Shixue Z.; Enhua W.

收藏 | 浏览/下载：60/0 | 提交时间：2013/03/25

In computer graphics animated models have been widely used to represent time-varying data. Reducing the models complexly is a common way to overcome the rendering limitations. In this paper 2009 IEEE. we propose an efficient method for generating multiresolution animated models based on deformation distance analysis. Our method obtains different LOD models by performing iterative edge contraction operations. We use deformation distance to analysis the deformation degree of the triangle planes during the whole animation and define a deformation weight to be added to the aggregated edge contraction cost. Thus features in areas with large deformation can be preserved well. Besides we propose a mesh optimization method for dynamic model sequence which can efficiently improve the temporal coherence and reduce visual artifacts between adjacent frames. The results show our approach is efficient easy to implement and good quality animated approximations with well-preserved fine details can be generated at any given frame. copy

Study on navigation control method for CyberCar based on machine vision (EI CONFERENCE) 会议论文 OAI收割
2007 IEEE International Conference on Robotics and Biomimetics, ROBIO, December 15, 2007 - December 18, 2007, Yalong Bay, Sanya, China
Zhang R.-H.; Wang R.-B.; You F.; Jia H.-G.; Chen T.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

The guiding principle and composition of CyberCar based on machine vision was introduced. Applying IM sequence signals as input response signals and least squares method to establish the dynamic equation for CyberCar steering system by system identification experiments firstly and then combined with the preview kinematics model and two-degree steering dynamic model of vehicle. Therefore it can trace the path steadily and reliably. 2008 IEEE. the steering control mathematics model based on preview kinematics for CyberCar was established. And then the switching hyper plane is designed by applying the optimal control theory during the change of the curve curvature radius is little the curve tracking of the intelligent vehicle is carried out by adopting sliding variable structure controller. Aim at the parameter uncertainty of tire a vehicle steering system uncertain model was founded and analyzed. A H optimal controller is designed with the method of H control theory to solve the problem about model uncertainty. The simulation and experiment results show that the controller designed by the proposed method has good robustness and adaptability

Local asymptotic properties of complex networks and their applications to infectious diseases 期刊论文 OAI收割
DYNAMICS OF CONTINUOUS DISCRETE AND IMPULSIVE SYSTEMS-SERIES B-APPLICATIONS & ALGORITHMS, 2006, 卷号: 13, 期号: 3-4, 页码: 451-461
作者: Lan, GL; Sun, SQ

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收藏 | 浏览/下载：19/0 | 提交时间：2018/07/30

complex network degree sequence branching process epidemic spreading SIR model