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有限元-优化-GAD集成一体的微机软件系统MCADS 被引量:11
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作者 顾元宪 程耿东 《计算结构力学及其应用》 CSCD 1990年第1期71-81,共11页
本文根据有限元分析方法、工程优化设计、计算机辅助设计(CAD)技术三者集成一体,发展适合CAD环境的高效实用的计算力学软件以及集成系统这一构想,提出并研究了实现这种集成化所必需的有限元-CAp接口,有限元-优化接口和优化-CAD接口中的... 本文根据有限元分析方法、工程优化设计、计算机辅助设计(CAD)技术三者集成一体,发展适合CAD环境的高效实用的计算力学软件以及集成系统这一构想,提出并研究了实现这种集成化所必需的有限元-CAp接口,有限元-优化接口和优化-CAD接口中的若干问题,介绍了所研制的面向工程的微型计算机辅助结构优化设计集成化软件系统MCADS。 展开更多
关键词 Mcads 软件系统 CAD
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阀门CAD系统VCADS
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作者 李春波 白作霖 赵汝嘉 《计算机辅助设计与制造》 1996年第7期19-21,共3页
阀门CAD系统VCADS西安交通大学李春波,白作霖,赵汝嘉阀门是石油、化工、电站、冶金、核电、航空、国防、城建等国民经济各部门不可缺少的流体控制设备,是一种涉及门类多、品种繁杂、量大面广的产品。其技术水平高低,品种规... 阀门CAD系统VCADS西安交通大学李春波,白作霖,赵汝嘉阀门是石油、化工、电站、冶金、核电、航空、国防、城建等国民经济各部门不可缺少的流体控制设备,是一种涉及门类多、品种繁杂、量大面广的产品。其技术水平高低,品种规格是否齐全,直接、间接地影响到国民... 展开更多
关键词 阀门 CAD Vcads
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计算机辅助结构优化设计软件MCADS的开发与应用 被引量:8
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作者 顾元宪 程耿东 《计算结构力学及其应用》 CSCD 1995年第3期304-307,共4页
工程结构优化设计,是将有限元等数值分析方法和数学规划等最优化方法结合起来、优选改进结构设计方案的一种先进技术,它使得工程师不再局限于凭经验和试凑的方法去设计,而是可以科学地高效率地选择最佳设计方案,因而也是结构分析和... 工程结构优化设计,是将有限元等数值分析方法和数学规划等最优化方法结合起来、优选改进结构设计方案的一种先进技术,它使得工程师不再局限于凭经验和试凑的方法去设计,而是可以科学地高效率地选择最佳设计方案,因而也是结构分析和CAD技术向更高层次的发展。本文介绍的MCADS是一个通用性的计算机辅助结构优化设计软件,它吸收了结构优化理论研究的成果并采用了面向工程结构设计的实用化技术,具备较强的功能和适用性,已作为商品化软件转让并在许多工业部门得到成功的应用. 展开更多
关键词 CAD 工程设计 软件 最优设计
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GMCADS系统的研究及应用
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作者 洪立民 袁清珂 周一鸣 《计算机辅助设计与图形学学报》 EI CSCD 1993年第3期204-210,共7页
当今,机械CAD向CAD/CAM/CAE集成化方向发展,机械系统运动学/动力学分析软件是集成化CAD/CAM/CAE不可缺少的支撑软件之一。我们以多刚体系统动力学为基本理论,研制了面向问题的、交互式的通用机械计算机辅助设计系统GMCADS。本文介绍了GM... 当今,机械CAD向CAD/CAM/CAE集成化方向发展,机械系统运动学/动力学分析软件是集成化CAD/CAM/CAE不可缺少的支撑软件之一。我们以多刚体系统动力学为基本理论,研制了面向问题的、交互式的通用机械计算机辅助设计系统GMCADS。本文介绍了GMCADS系统的分析原理、图形输出技术,并给出了应用实例。 展开更多
关键词 CAD GMcads 研究 应用
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Alignment of beam position monitors in cryomodule of CADS injector Ⅱ 被引量:2
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作者 Jian-Dong Yuan Yuan He +7 位作者 Bin Zhang Jun-Hui Zhang Jun-Xia Wu Yong Zhang Feng-Feng Wang Jun-Jie Yao Guo-Zhen Sun Yu-Qin Wan 《Nuclear Science and Techniques》 SCIE CAS CSCD 2017年第6期95-100,共6页
Significant temperature difference(300-77 K or even 4 K) can cause large deformations and displacements of the beam position monitors(BPMs),which affect BPMs measurement resolution or even cause their malfunction in c... Significant temperature difference(300-77 K or even 4 K) can cause large deformations and displacements of the beam position monitors(BPMs),which affect BPMs measurement resolution or even cause their malfunction in cryogenic situations.In this paper,to check the offset from the mechanical to electrical center in low temperature(77 K),Fourier's law and finite element method are used to simulate cryo-deformation.Laser tracker and micro-alignment telescope are employed in combined BPM calibration,installation and monitoring.The calibration error is<0.02 mm,and the installation and monitoring precision are 0.06 mm and 0.01 mm,respectively.The monitored cryo-deformation agrees well with the simulation results.These indicate that the combined alignment can improve performance of the BPM system.All these guaranteed the success of running the 9.55 MeV@2.14 mA cw protons. 展开更多
关键词 BEAM POSITION MONITORS ALIGNMENT Fourier’s LAW Cryomodule cads ANSYS
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“电机设计”课程CAD辅助教学软件——EMCADS的研制与应用 被引量:2
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作者 钱巍 《电气电子教学学报》 1994年第4期60-63,共4页
《电机设计》课程是强电类专业高年级本科生及研究生的必选课程,具有学时少、内容多、工程性强的特点.传统的教学方法主要基于电机设计的基本理论与经典设计方法.但由于它不能很好地与现代设计方法接轨,并且缺乏必要的教学实践环节和辅... 《电机设计》课程是强电类专业高年级本科生及研究生的必选课程,具有学时少、内容多、工程性强的特点.传统的教学方法主要基于电机设计的基本理论与经典设计方法.但由于它不能很好地与现代设计方法接轨,并且缺乏必要的教学实践环节和辅助教学手段,教学效果不甚理想.作者经过几年的摸索与实践,结合近年来的科研成果研制出一套具有模块化结构的电机CAD辅助教学软件——EMCADS.本文就此作一简介,供有关同仁参考并期指教. 展开更多
关键词 电机设计 辅助教学软件 优化设计 目标函数 CAD系统 现代设计方法 电机CAD 三相异步电动机 子模块 设计方案
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马拉格锡矿地测采综合CAD应用系统(GMCADS) 被引量:2
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作者 童祥 《矿产与地质》 2000年第3期199-201,共3页
研究一整套适合于矿山地质、测量和开采设计的应用软件 (GMCADS) ,可解决矿山地质、测量、采矿中的设计、图件、计算问题 。
关键词 CAD软件 GMcads 设计 绘图 马拉格锡矿 锡矿
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工程产品CAD软件开发环境NDCADSAS
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作者 王命延 钟伯刚 《计算机研究与发展》 EI CSCD 北大核心 1997年第4期307-311,共5页
本文介绍了产品CAD软件开发环境NDCADSAS,利用这个环境,工程设计人员可以方便地开发产品CAD系统.同时,该文也讨论了产品设计模型、产品CAD系统模型以及NDCADSAS总体模型.最后。
关键词 产品CAD 软件自动化 开发环境 程序生成 CAD
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大型火电机组厂用电CAD系统ASCADS的设计与实现 被引量:1
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作者 李国庆 郭金来 王云刚 《电工技术杂志》 1993年第2期31-34,共4页
本文介绍了一个大型火电机组电厂厂用电一体化CAD系统。该系统适用于300MW、600MW等大型火电机组厂用电系统的工程设计与主要厂用电设备性能参数成套优化,综合数据库、工程分析计算以及绘图于一体,在计算机上实现了厂用电系统CAD。
关键词 发电厂 CAD 数据库
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5-11 Conceptual Design of Sub-critical Reactor of CADS Project
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作者 Gu Long Li Jinyang +6 位作者 Wang Dawei Fan Qing Qin Changping Liu Lu Zhu Yanlei Yu Rui Chai Yilin 《IMP & HIRFL Annual Report》 2015年第1期233-234,共2页
China Initiative Accelerator Driven System (CIADS) proposed by the Chinese Academy of Sciences which is one of the twelve Major National Scientific and Technological Infrastructures has been approved by National Devel... China Initiative Accelerator Driven System (CIADS) proposed by the Chinese Academy of Sciences which is one of the twelve Major National Scientific and Technological Infrastructures has been approved by National Development and Reform Commission of China, and supposed to be the first principle prototype ADS experimental facility in the world. 展开更多
关键词 REACTOR cads PROJECT
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6-10 Beam Commissioning Activities of CADS Superconducting Demo Facility
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作者 Wang Zhijun He Yuan +7 位作者 Jia Huan Dou Weiping Liu Shuhui Chen Weilong Tao Yue Wu Jianqiang Zhang Shenghu Zhao Hongwei 《IMP & HIRFL Annual Report》 2015年第1期271-271,共1页
The demo facility of china ADS injector II was installed in the tunnel in 2014. The on-site layout of demo facility is shown in the Fig. 1. The demo faclity mainly includes ECRIS, LEBT, RFQ acclerator, MEBT and TCM6. ... The demo facility of china ADS injector II was installed in the tunnel in 2014. The on-site layout of demo facility is shown in the Fig. 1. The demo faclity mainly includes ECRIS, LEBT, RFQ acclerator, MEBT and TCM6. The TCM6 is composed by six SC HWR cavity,six SC soleniods and five BPMs. The TCM6 will be the prototype for the future 2025 MeV CADS superconducting linac. The beam commissioning of CADS Injector II started in June 2015. It mainly consists of three steps. 展开更多
关键词 cads SUPERCONDUCTING DEMO
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HHCADS V.1.0版软件包的研制开发
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作者 何伯良 《河海大学机械学院学报》 1995年第2期12-16,共5页
本文介绍了HHCADCSV.1.0版软件包的研制和总体设计思想及主要功能,并进一步提出了开发完善的主要设想.
关键词 应用程序 CAD 自动控制 控制系统
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CADSE图形系统用户接口的设计特点
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作者 庄建成 《福建电脑》 1993年第2期20-23,共4页
关键词 用户接口 设计 特点 图形 cadsE
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RailwayLocationAutomatedOptimizationCADSystem
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作者 Yi Sirong Department of Railway and Road Engineering, Southwest Jiaotong University, Chengdu 610031, China 《Journal of Modern Transportation》 1996年第1期32-43,共12页
By combining interactive graphic CAD and optimizing methods we have developed an automated optimum CAD system for railway location AORLCAD. Using the AORLCAD, the optimization of both horizontal and vertical alignm... By combining interactive graphic CAD and optimizing methods we have developed an automated optimum CAD system for railway location AORLCAD. Using the AORLCAD, the optimization of both horizontal and vertical alignment of railway can be realized by using automated optimization interactive graphic design alternatively. The result makes automated optimum technique for railway location more completed. The methods of interactive graphic design and optimum techniques used by AORLCAD are introduced in detail. 展开更多
关键词 railway location OPTIMIZATION CAD
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PG—MECADS的开发和图形库的建立
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作者 鲍秀蓉 《交通与计算机》 1989年第3期88-90,共3页
本文主要介绍地质矿产部引进、消化和开发微机机械 CAD/CAM 系统取得的成果,并对建立地质设备产品图形库的打算作了具体的建议、规划和安排。
关键词 图形库 PC机 机械工程 CAD
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总图专业计算机辅助设计系统GLCADS
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作者 王少平 《电器工厂设计》 1992年第72期14-19,共6页
关键词 CAD 总图设计 工厂布局
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农业拖拉机尾灯多色注塑模具设计
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作者 尹小定 赵会娟 《农机化研究》 北大核心 2025年第1期239-242,247,共5页
以农业拖拉机尾灯为研究对象,分析了尾灯的内部结构和工艺性,并针对双色模具的特殊性,分析了模具成型方案和设计流程,基于AutoCAD和CAE软件完成了尾灯双色塑件模具的设计。开模试验表明:该产品符合设计需求,整个产品结构稳定,透明度好,... 以农业拖拉机尾灯为研究对象,分析了尾灯的内部结构和工艺性,并针对双色模具的特殊性,分析了模具成型方案和设计流程,基于AutoCAD和CAE软件完成了尾灯双色塑件模具的设计。开模试验表明:该产品符合设计需求,整个产品结构稳定,透明度好,设计的模具结构合理、工艺流程可靠,能够满足实际的生产应用,工程应用价值较高。 展开更多
关键词 农业拖拉机 尾灯 CAD CAE 双色塑件 模具
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Multi-Scale Dilated Convolution Network for SPECT-MPI Cardiovascular Disease Classification with Adaptive Denoising and Attenuation Correction
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作者 A.Robert Singh Suganya Athisayamani +1 位作者 Gyanendra Prasad Joshi Bhanu Shrestha 《Computer Modeling in Engineering & Sciences》 SCIE EI 2025年第1期299-327,共29页
Myocardial perfusion imaging(MPI),which uses single-photon emission computed tomography(SPECT),is a well-known estimating tool for medical diagnosis,employing the classification of images to show situations in coronar... Myocardial perfusion imaging(MPI),which uses single-photon emission computed tomography(SPECT),is a well-known estimating tool for medical diagnosis,employing the classification of images to show situations in coronary artery disease(CAD).The automatic classification of SPECT images for different techniques has achieved near-optimal accuracy when using convolutional neural networks(CNNs).This paper uses a SPECT classification framework with three steps:1)Image denoising,2)Attenuation correction,and 3)Image classification.Image denoising is done by a U-Net architecture that ensures effective image denoising.Attenuation correction is implemented by a convolution neural network model that can remove the attenuation that affects the feature extraction process of classification.Finally,a novel multi-scale diluted convolution(MSDC)network is proposed.It merges the features extracted in different scales and makes the model learn the features more efficiently.Three scales of filters with size 3×3 are used to extract features.All three steps are compared with state-of-the-art methods.The proposed denoising architecture ensures a high-quality image with the highest peak signal-to-noise ratio(PSNR)value of 39.7.The proposed classification method is compared with the five different CNN models,and the proposed method ensures better classification with an accuracy of 96%,precision of 87%,sensitivity of 87%,specificity of 89%,and F1-score of 87%.To demonstrate the importance of preprocessing,the classification model was analyzed without denoising and attenuation correction. 展开更多
关键词 SPECT-MPI CAD MSDC DENOISING attenuation correction classification
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Semantic Segmentation of Lumbar Vertebrae Using Meijering U-Net(MU-Net)on Spine Magnetic Resonance Images
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作者 Lakshmi S V V Shiloah Elizabeth Darmanayagam Sunil Retmin Raj Cyril 《Computer Modeling in Engineering & Sciences》 SCIE EI 2025年第1期733-757,共25页
Lower back pain is one of the most common medical problems in the world and it is experienced by a huge percentage of people everywhere.Due to its ability to produce a detailed view of the soft tissues,including the s... Lower back pain is one of the most common medical problems in the world and it is experienced by a huge percentage of people everywhere.Due to its ability to produce a detailed view of the soft tissues,including the spinal cord,nerves,intervertebral discs,and vertebrae,Magnetic Resonance Imaging is thought to be the most effective method for imaging the spine.The semantic segmentation of vertebrae plays a major role in the diagnostic process of lumbar diseases.It is difficult to semantically partition the vertebrae in Magnetic Resonance Images from the surrounding variety of tissues,including muscles,ligaments,and intervertebral discs.U-Net is a powerful deep-learning architecture to handle the challenges of medical image analysis tasks and achieves high segmentation accuracy.This work proposes a modified U-Net architecture namely MU-Net,consisting of the Meijering convolutional layer that incorporates the Meijering filter to perform the semantic segmentation of lumbar vertebrae L1 to L5 and sacral vertebra S1.Pseudo-colour mask images were generated and used as ground truth for training the model.The work has been carried out on 1312 images expanded from T1-weighted mid-sagittal MRI images of 515 patients in the Lumbar Spine MRI Dataset publicly available from Mendeley Data.The proposed MU-Net model for the semantic segmentation of the lumbar vertebrae gives better performance with 98.79%of pixel accuracy(PA),98.66%of dice similarity coefficient(DSC),97.36%of Jaccard coefficient,and 92.55%mean Intersection over Union(mean IoU)metrics using the mentioned dataset. 展开更多
关键词 Computer aided diagnosis(CAD) magnetic resonance imaging(MRI) semantic segmentation lumbar vertebrae deep learning U-Net model
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Design and construction of the MEBT1 for CADS injector scheme Ⅱ
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作者 贾欢 何源 +10 位作者 原有进 宋明涛 皇世春 张翔 袁辰彰 牛海华 张鹏 武军霞 张雍 康新才 罗成 《Chinese Physics C》 SCIE CAS CSCD 2015年第10期121-126,共6页
A Medium Energy Beam Transport line 1 (MEBT1) has been designed for Injector Scheme II of the China, ADS project. To match the beam from RFQ to Superconducting (SC) Half Wave Resonator (HWR) sections with emitta... A Medium Energy Beam Transport line 1 (MEBT1) has been designed for Injector Scheme II of the China, ADS project. To match the beam from RFQ to Superconducting (SC) Half Wave Resonator (HWR) sections with emittance preservation, the MEBT1 has been designed to be mechanically compact. Working at 162.5 MHz, the MEBT1 transports a 10 mA, 2.1 MeV proton beam using seven quadrupoles and two bunching cavities within 2.7 meters. Three collimators are placed between every two adjacent quadrupoles to collimate the beam halo. Design and construction of the MEBT1 are presented in this paper. 展开更多
关键词 MEBT cads MATCH COLLIMATION QWR
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