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Two New Sesquiterpenes from Celastrus ***

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Chinese Chemical Letters 1997年第11期8卷 961-964页

作者： Kun ZHANG Yan Hong WANG Yao Zu CHEN (The state key laboratory of Applied Organic Chemistry, Lanzhou university,Lanzhou. 730000)(Institute of Organic Chemistry, zhejiang university, hangzhou,31002.)(Guangdong university of Technology,Guangzhau,510090) Lanzhou Univ State Key Lab Appl Organ Chem Lanzhou 730000 Peoples R China zhejiang Univ Inst Organ Chem Hangzhou 310027 Peoples R China Guangdong Univ Technol Guangzhau 510090 Peoples R China

Two new beta-dihydroagarofuran sesquiterpene polyol esters were isolated from Celastrus ***. Their Structures were deduced on the basis of spectral analyses including 2D NMR. CO2 supercritical fluid was used in separa... 详细信息

关键词： CDC Two New Sesquiterpenes from Celastrus Paniculatus.Subsp.Paniculatus

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提花织物外观的计算机模拟生成

系统仿真学报 2001年第3期13卷 400-403页

作者：顾尔丹马凌洲许端清陈纯 cad&cg国家重点实验室浙江大学计算机科学与工程系杭州310027

近年来，纺织cad/CAM技术在国内外发展十分迅速。作为纺织工业cad技术的具体应用，提花织物外观的计算机模拟生成是织物设计检验的一种重要手段。通过对织物织造时的纱线属性、排列以及组织模式的分析，本文着重探讨如何结合图形学的光... 详细信息

近年来，纺织cad/CAM技术在国内外发展十分迅速。作为纺织工业cad技术的具体应用，提花织物外观的计算机模拟生成是织物设计检验的一种重要手段。通过对织物织造时的纱线属性、排列以及组织模式的分析，本文着重探讨如何结合图形学的光照模型技术来实现提花织物真实感外观的模拟生成，并提出了该技术路线的具体实现方法。文章的最后部分给出了模拟生成的部分效果图样，并对当前方法中存在的问题和可改进之处进行了总结和展望。

关键词：提花枳物组织模式光照模型 cad CAM 计算机模拟

A fusion algorithm for remote sensing images based on nonsubsampled pyramids and bidimensional empirical decomposition

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Science china(Technological Sciences) 2010年第S1期53卷 196-204页

作者： ZHANG XiaoDong 1,WANG WenBo 2,WANG DiFeng 3 & ZHANG Yu 4 1 state key laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan university,Wuhan 430079,china 2 College of Sciences,Wuhan university of Science and Technology,Wuhan 430065,china 3state key laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,state Oceanic Administration,hangzhou 310012,china 4 Spatial Information Technology Application Research Institute,Changjiang River Scientific Research Institute,Wuhan 430010,china Wuhan Univ State Key Lab Informat Engn Surveying Mapping & R Wuhan 430079 Peoples R China Wuhan Univ Sci & Technol Coll Sci Wuhan 430065 Peoples R China state Ocean Adm Inst Oceanog 2 State Key Lab Satellite Ocean Environm Dynam Hangzhou 310012 Zhejiang Peoples R China Changjiang River Sci Res Inst Spatial Informat Technol Applicat Res Inst Wuhan 430010 Peoples R China

In order to improve the quality of remote sensing image fusion,a new method combining nonsubsampled Laplacian pyramid (NLP)and bidimensional empirical mode decomposition(BEMD)is ***,the high resolution panchromatic image (PAN)is decomposed using NLP until the approximate component and the low resolution multispectral image(MS)contain features with a similar ***,the approximation component and the MS are decomposed by BEMD,resulting in a number of bidimensional intrinsic mode functions(BIMF)and a residue *** instantaneous frequency is computed in 4 directions of the *** the positive or negative coefficients in the corresponding position,a weighted algorithm is designed for fusing the high frequency details using the instantaneous frequency and the coefficient absolute value of the BIMFs as fusion *** fused image is then obtained through inverse BEMD and *** results have illustrated the advantage of this method over the IHS,DWT andà-Trous wavelet in both spectral and spatial detail qualities.

关键词： bidimensional empirical mode decomposition nonsubsampled pyramid instantaneous frequency remote sensing image fusion

The Feature Extraction of Macromolecular Field Based on Level Set Method

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The Feature Extraction of Macromolecular Field Based on Leve...

Inpainting algorithm for Jacquared Image Based on Phase-Field Model

2007 10th IEEE International Conferences on Computer Aided Design and Computer Graphics(cad/Graphics 2007)

作者： Wei Han,Zhidong Jin,Li Wang,Min Hu,Zhangye Wang,Qunsheng Peng state key laboratory of cad&cg,zhejiang university hangzhou 31002.,china

In this paper,we exploit the level set methods to extract and analyze the feature of macromolecular *** the 3D volume data of the field,we propose a novel variational formulation of the geometric active contour,which is composed of an external energy to drive the active contours' motion,and an internal energy which penalizes the level set function adaptively to avoid periodically *** adjust the parameters of each component and examine their influences in the whole *** approach provides an intuitive way to study spatial relationships of the segmented *** it is shown to be more accurate and efficient on the feature extraction regarding the HIV-1 protease molecular field and the DPS protein molecular *** the exploration,we successfully found the escape route of water molecules hidden in the HIV-1 protease and the internal cavity of the DPS protein for the iron atom's entry and deposition,which are both in accordance with the experimental results.

关键词： DPS HIV The Feature Extraction of Macromolecular Field Based on Level Set Method

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Inpainting algorithm for Jacquared Image Based on Phase-Fiel...

Surface Modeling from 3D Unorganized Points

2008 3rd International Conference on Intelligent System and Knowledge Engineering(ISKE 2008)

作者： Zhilin Feng 1 Jianwei Yin 2 Jianan Zhou 3 1.College of Zhijiang zhejiang university of Technology hangzhou 31002. china 2.state key laboratory of cad & cg zhejiang university hangzhou 31002. china 3.Department of Information and Technology zhejiang Vocational College of Commerce hangzhou 310053 china

Jacquard image inpainting is an interesting new research topic in pattern preprocessing for jacquard *** field model has been well acknowledged as an important method for image *** paper discussed the problem of jacquard image inpainting by approaching the phase field paradigm from a numerical approximation *** basic idea is to represent the damaged pattern of interest in implicit form,and fill-in the damaged parts with a system of geometric partial differential equations derived from phase-field *** novelty of our approach lies primarily in exploiting explicitly the constraint enforced by the numerical solving of the sequential evolving of phase-field *** experiments are carried out in order to validate and compare the algorithm both quantitatively and *** show the advantages of our algorithm and its readily application to jacquard texture.

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Surface Modeling from 3D Unorganized Points

2002年IEEE十区计算机、通信、控制和电机工程会议

作者： LIANG Ronghua CHEN Chun PAN Zhigeng JIN Cheng Department of Compute Science and Engineering, zhejiang university hangzhou china 31002. Department of Computer Science and Engineering, hangzhou Institute of Electronics Engineering, hangzhou china 31002. state key lab of cad&cg, zhejiang university hangzhou china 31002.

Surface modeling from 3D unorganized points is ofgreat importance in variable fields such as computer vision,images based modeling, scientific computing visualization, etc..In this paper we present a new algorithm based on HuguesHoppe algorithm. First these points are divided into logicalcubes whose size is decided automatically from theunorganized points. Then the tangent planes and normal vectorsat each point are calculated and the normal vectors areorientated to the outside of surface based on WFS. Finally thesurface model of triangular meshes can be obtained by theoutput of Marching Cubes. Experimental results show the highefficiency of the algorithm.

关键词： 3D triangulation WFS Marching Cubes iso-surface

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Poisson曲线的递推求值

计算机工程与应用 2003年第24期39卷 74-76页

作者：缪永伟金建国浙江大学cad&cg国家重点实验室杭州310027 浙江工业大学理学院杭州310032

计算Bézier曲线上一点的DeCasteljau递推算法和计算B样条曲线上一点的DeBoor递推算法是计算机辅助几何设计(CAGD)领域里的两个经典算法。它们使得计算曲线上一点变得直观和快捷,非常适合用计算机编程实现。文章对Poisson曲线进行了研究... 详细信息

计算Bézier曲线上一点的DeCasteljau递推算法和计算B样条曲线上一点的DeBoor递推算法是计算机辅助几何设计(CAGD)领域里的两个经典算法。它们使得计算曲线上一点变得直观和快捷,非常适合用计算机编程实现。文章对Poisson曲线进行了研究,在上述算法的基础上,提出了计算Poisson曲线上一点的递推算法,并将其推广到有理Poisson曲线的情形,提出了有理Poisson曲线的递推算法。

关键词： De-Casteljau算法 De-Boor算法 Poisson曲线有理Poisson曲线递推求值

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电视浏览器系统设计

计算机工程与应用 2001年第2期37卷 58-60页

作者：卢文成陈文智石教英浙江大学cad&cg国家重点实验室杭州310027 浙江大学计算机科学与工程系杭州310027

电视浏览器（TV－BROWSER）是用于有线电视网（CATV）中客户端机顶盒（SET－TOP BOX）上的浏览器。该文分别对其主要组成部分——资源获取、输入处理模块、HTML解析器、显示模块和服务主程序进行了详细解说，最后阐述了在具体的分析设... 详细信息

电视浏览器（TV－BROWSER）是用于有线电视网（CATV）中客户端机顶盒（SET－TOP BOX）上的浏览器。该文分别对其主要组成部分——资源获取、输入处理模块、HTML解析器、显示模块和服务主程序进行了详细解说，最后阐述了在具体的分析设计过程中遇到的关键技术及其实现方法。

关键词：电视浏览器系统机顶盒有线电视网 WWW

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基于粒子系统的实时瀑布模拟

系统仿真学报 2004年第11期16卷 2471-2474,2478页

作者：管宇邹林灿陈为彭群生浙江大学cad&cg国家重点实验室杭州310027

提出以线元为基本造型单位并基于动力学原理模拟瀑布的运动轨迹,结合层次包围盒和聚类树技术加速粒子的碰撞检测,并采用逐渐淡化融合的方法模拟水花的消失过程。实验证明该算法模拟瀑布的运动和外观效果真实, 在普通的PC 平台上利用标... 详细信息

提出以线元为基本造型单位并基于动力学原理模拟瀑布的运动轨迹,结合层次包围盒和聚类树技术加速粒子的碰撞检测,并采用逐渐淡化融合的方法模拟水花的消失过程。实验证明该算法模拟瀑布的运动和外观效果真实, 在普通的PC 平台上利用标准图形系统即可获得实时的绘制速度。

关键词：粒子系统层次包围盒聚类树碰撞检测实时绘制