检索结果-南通市图书馆

A NEW DITERPENOID ALKALOID FROM DELPHININUM CAERULEUM

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1996年第2期7卷 139-140页

作者： YaN,WANG Yuan Jiang PAN Shao Nong CHEN Yao Zu CHEN(state key laboratory of Applied Organic Chemistry and Department of Chemistry. Lanzhou university, Lanzhou 730000)(Departwent of Chemistry, zhejiang university,hangzhou 31002.) LANZHOU UNIV STATE KEY LAB APPL ORGAN CHEMLANZHOU 730000PEOPLES R CHINA LANZHOU UNIV DEPT CHEMLANZHOU 730000PEOPLES R CHINA zhejiang UNIV DEPT CHEMHANGZHOU 310027PEOPLES R CHINA

A new minor diterpenoid alkaloid containing a C(19)=N-azomethine group, caerunine (1) was isolated from Delphinium caeruleum ***, its structure was determined by spectral data.

关键词：

RESEARCH ON NC PROGRAM DESIDN FOR MASS CUSTOMIZATION

在线全文

学校读者我要写书评

暂无评论

RESEARCH ON NC PROGRAM DESIDN FOR MASS CUSTOMIZATION

2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： CUI Jian, QI Guoning state key laboratory of cad&CAG, zhejiang university hangzhou 31002., china

To meet the NC program design of mechanical parts for Mass Customization, this paper puts forward the systematic structure and information model of NC program design. On the basis of the NC program in

关键词： Mass customization (MC) SML (Tabular layouts of article characteristics) variant design main NC meta-model program.

A CASE STUDY IN TOP-DOWN COLlabORATIVE ASSEMBLY DESIGN

在线全文

cnki会议

学校读者我要写书评

暂无评论

A CASE STUDY IN TOP-DOWN COLLABORATIVE ASSEMBLY DESIGN

2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： YANG Youdong, , LI Zhihua, GAO Shuming, ZHANG Shuting state key laboratory of cad&cg, zhejiang university, zhejiang hangzhou 31002., china Zhijing College, zhejiang university of Technology, zhejiang hangzhou 31002., china

The top-down collaborative assembly design can greatly facilitate concurrency of the product design while improve product development efficiency and decrease its cost, but the study on it can’t be fou

关键词： Top-down Collaborative assembly design Cooperation activity diagram Case study

在线全文

cnki会议

学校读者我要写书评

暂无评论

基于计算机图形处理器加速的体绘制

系统仿真学报 2009年第8期21卷 2285-2287,2291页

作者：姜琼孔明明林海浙江大学附属第二医院杭州310009 浙江大学cad&cg国家重点实验室杭州310027

可编程顶点渲染器和片元渲染器已成为新一代图形处理器(GPU)的标志。应用可编程渲染器带来了许多过去由固定渲染器无法得到的复杂图像效果和三维环境的真实感。图形硬件的可编程能力也扩展了硬件加速的直接体绘制算法,提高了它的交互性... 详细信息

可编程顶点渲染器和片元渲染器已成为新一代图形处理器(GPU)的标志。应用可编程渲染器带来了许多过去由固定渲染器无法得到的复杂图像效果和三维环境的真实感。图形硬件的可编程能力也扩展了硬件加速的直接体绘制算法,提高了它的交互性能和图像质量。我们充分利用硬件加速支持的三维纹理、片元渲染器,实现了硬件加速的体绘制。

关键词：直接体绘制三维纹理多维传输函数图形处理器

在线全文

学校读者我要写书评

暂无评论

支持大批量定制的产品配置设计系统的研究

计算机辅助设计与图形学学报 2003年第8期15卷 931-937页

作者：谭建荣李涛戴若夷浙江大学cad&cg国家重点实验室杭州310027

针对大批量定制生产的特点 ,提出基于产品功能结构单元的产品配置模板来完成对客户配置需求的快速响应 ,给出了产品配置模板的信息模型和配置求解策略由于机械产品结构的复杂性 ,引入配置设计知识的混合表达方法以适应不同产品设计类... 详细信息

针对大批量定制生产的特点 ,提出基于产品功能结构单元的产品配置模板来完成对客户配置需求的快速响应 ,给出了产品配置模板的信息模型和配置求解策略由于机械产品结构的复杂性 ,引入配置设计知识的混合表达方法以适应不同产品设计类型的要求

关键词：产品配置设计系统机械产品结构产品功能结构单元知识表达智能工程设计系统

PARAMETRIC 3D SLEEVE MODELLING BASED ON HYBRID DIMENSION

在线全文

学校读者我要写书评

暂无评论

PARAMETRIC 3D SLEEVE MODELLING BASED ON HYBRID DIMENSION

2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： CHEN Long *, LU Guodong*, WANG Jin*, ZHANG Dongliang *state key lab. of cad&cg, zhejiang university, hangzhou, 31002. ,china) Digital Fashion Ltd, Osaka, Japan

Sleeve is one of important components of garment. This paper presents a 3D sleeve modelling method. It is a parametric design based on hybrid dimension. There are two ways to provide parameters for sl

关键词： Sleeve design parametric modelling curve network hybrid dimension surface developability.

3D GARMENT SURFACE DESIGN USING SKETCH-BASED MODELLING METHOD

在线全文

cnki会议

学校读者我要写书评

暂无评论

3D GARMENT SURFACE DESIGN USING SKETCH-BASED MODELLING METHO...

2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： WANG Jin*,LU Guodong*, CHEN Long*, Zhang Dongliang *state key lab. of cad&cg, zhejiang university, hangzhou 31002., china Digital Fashion Ltd, Osaka, Japan

This paper focuses on 3D garment surface generation, modelling and design-reuse method in Gcad system. Firstly, the garment mesh is generated by piecewise technique, and a method is presented to enhan

关键词： 3D garment surface sketch-based modelling encoding/decoding design-reuse.

在线全文

cnki会议

学校读者我要写书评

暂无评论

结合区间算术和退火遗传算法的曲面求交

数值计算与计算机应用 2004年第4期25卷 241-251页

作者：王华董金祥浙江大学人工智能研究所杭州310027 浙江大学cad&cg国家重点实验室

In this paper, a robust surface intersection algorithm is constructed using interval arithmetic and annealing genetic algorithm. By using interval arithmetic to analyse error boundary, to divide three ill-conditioned cases in surface intersection, and improve the robustness of the algorithm. By utilizing the global searching ability and instinct attribute for parallel computation of annealing genetic algorithm, to realize stable and efficient surface intersection. The algorithm is descripted in detail and has been implemented in C++ based on Windows NT platform. Instances and test datum are given also.

关键词：曲面求交 C++ NT 退火遗传算法区间算术

Multi-mode Solid Model Retrieval Based on Partial Matching

在线全文

学校读者我要写书评

暂无评论

Multi-mode Solid Model Retrieval Based on Partial Matching

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

作者： Jing Bai,YuSheng Liu,ShuMing Gao state key lab.of cad&cg,zhejiang Univ.hangzhou,P.R.china,31002.

In this paper,a multi-mode retrieval approach of solid models is ***,a local feature determination method based on wavelet transform is given,which makes the local feature agree with the human perception of resemblance;then a uniform and efficient DBMS (Dilation based multiresolutional skeleton) generation method for global model and local feature using adaptive voxelization and local dilation is proposed;finally a flexible similarity assessment is proposed which supports both global matching and partial matching effectively and further supports different retrieval *** experiment results show that a multi-mode retrieval approach can describe user's retrieval intent more precisely and return retrieval results more properly.

关键词： Multi-mode Solid Model Retrieval Based on Partial Matching Model