共查询到20条相似文献，搜索用时 31 毫秒
1.
在MasterCAM三维模型生成的工程图中没有提供形位公差代号和表面结构符号的标注方法,工程图图框和标题栏也不符合要求。为了解决这一问题,开发了形位公差图形库、表面结构符号库与标准图框和标题栏,这对于将三维模型快速地生成符合国家标准的工程图样具有重要的意义。 相似文献
2.
Wieslaw L. Nowinski Arumugam Thirunavuukarasuu Anand Ananthasubramaniam Beng Choon Chua Guoyu Qian Natalia G. Nowinska Yevgen Marchenko Ihar Volkau 《Anatomical sciences education》2009,2(5):244-252
Preparation of tests and student's assessment by the instructor are time consuming. We address these two tasks in neuroanatomy education by employing a digital media application with a three‐dimensional (3D), interactive, fully segmented, and labeled brain atlas. The anatomical and vascular models in the atlas are linked to Terminologia Anatomica. Because the cerebral models are fully segmented and labeled, our approach enables automatic and random atlas‐derived generation of questions to test location and naming of cerebral structures. This is done in four steps: test individualization by the instructor, test taking by the students at their convenience, automatic student assessment by the application, and communication of the individual assessment to the instructor. A computer‐based application with an interactive 3D atlas and a preliminary mobile‐based application were developed to realize this approach. The application works in two test modes: instructor and student. In the instructor mode, the instructor customizes the test by setting the scope of testing and student performance criteria, which takes a few seconds. In the student mode, the student is tested and automatically assessed. Self‐testing is also feasible at any time and pace. Our approach is automatic both with respect to test generation and student assessment. It is also objective, rapid, and customizable. We believe that this approach is novel from computer‐based, mobile‐based, and atlas‐assisted standpoints. Anat Sci Educ 2:244–252, 2009. © 2009 American Association of Anatomists. 相似文献
3.
Prediction of channel dredging volume is critical for project cost estimation. However, many proposed approximate methods are not accurate. This paper presents a novel numerical method to accurately calculate the dredg- ing volume using a 3D stratum model (DSM) and a channel surface model. First, the 3D DSM is constructed rapidly yet accurately from non-uniform rational B-splines (NURBS) surfaces through Boolean operation between a physical terrain model and a stratum surfaces model. Then, a parametric channel surface model is built from cross-section data and a channel center line using code implemented in the VC++ programming language. Finally, the volumes of different types of physical stratums can be calculated automatically and hierarchically to determine the dredging volume. Practical application shows that the DSM method is more precise and faster compared to the section method, and that the implementation of the developed software provides an interactive graphical user interface and visual presentation. 相似文献
4.
目前市面上的划线设备仍需依赖人的视觉观测、手动操纵,沿基准线喷涂标线。为了提高划线效率,降低人工成本,提出一种基于STM32的自动划线小车系统。该系统由遥控器及行进控制两大部分构成。首先将拟划线路径按比例缩放,依据遥控器模块上液晶屏分度值,通过遥控器按键将路径输入至液晶屏,也可直接调出标准路径;然后将数据打包成数组形式,通过无线传输模块NRF发送至小车控制器;最后启动小车,小车按照预定轨迹实现划线任务。多次实验验证表明,该系统可实现自动划线任务,具有划线稳定、作业高效等优点。 相似文献
5.
Due to the complex nature of multi-source geological data, it is difficult to rebuild every geological struc-ture through a single 3D modeling method. The multi-source data interpretation method put forward in this analysis is based on a database-driven pattern and focuses on the discrete and irregular features of geological data. The geological data from a variety of sources covering a range of accuracy, resolution, quantity and quality are classified and inte-grated according to their reliability and consistency for 3D modeling. The new interpolation-approximation fitting construction algorithm of geological surfaces with the non-uniform rational B-spline （NURBS） technique is then pre-sented. The NURBS technique can retain the balance among the requirements for accuracy, surface continuity and data storage of geological structures. Finally, four alternative 3D modeling approaches are demonstrated with reference to some examples, which are selected according to the data quantity and accuracy specification. The proposed approaches offer flexible modeling patterns for different practical engineering demands. 相似文献
6.
Parametric design of a part with free-form surfaces 总被引：1，自引：0，他引：1
KIM Yeoung-il KIM Li-ra JUN Cha-soo 《浙江大学学报(A卷英文版)》2006,7(9):1530-1534
INTRODUCTION A 3D solid model is used in various processes such as design, engineering evaluation, drafting, manufacturing, and so on. It is a time-consuming and skill-required job to create a complicated 3D solid model. Most commercial CAD tools support func- tions to generate engineering drawings from solid models automatically. However, adjusting layouts, dimensioning, and inserting annotations are required and they are tedious and time-consuming work. Most current CAD/CAM/CAE so… 相似文献
7.
随着网络技术的发展,英语在线测试系统逐渐普及。本文介绍了一个基于流媒体技术的英语在线测试系统的设计与开发,用于实现英语在线听力、选择、判断等多题型测试,并实现自动组卷、自动评卷及统计分数等功能。 相似文献
8.
阐述了ArcGIS作为一种综合性处理工具在三维石油数据集中的应用。同时,在石油工业中三维可视化和分析工具的应用非常广泛,通过这些工具得到的综合数据和某个组织所拥有的其他空间数据是很难直接应用的。利用地理数据库的叠置单元块特性,复杂的三维特性能够存储在地理数据库中,并且可以通过三维立体方式在ArcGIS环境下达到可视化的效果。这就实现了通过传统通用仪器资源获得来自于地质、工程或者勘测源的标准空间数据的复杂三维对象的综合化。 相似文献
9.
WU Geng feng DONG Jian quan CHEN Yi min CAO Min ZHANG Yue 《上海大学学报(英文版)》1999,3(4):282-286
１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ａｆｕｚｚｙｎｅｕｒａｌｎｅｔｗｏｒｋｃｏｎｔｒｏｌｌｅｒｂａｓｅｄｏｎｔｈｅｃｏｍｂｉｎａｔｉｏｎｏｆｆｕｚｚｙｌｏｇｉｃｓｙｓｔｅｍａｎｄｎｅｕｒａｌｎｅｔｗｏｒｋｈａｓｕｎｉｑｕｅｃｈａｒａｃｔｅｒｉｓｔｉｃｓ．Ｉｔｎｏｔｏｎｌｙｈａｓｔｈｅｆｕｎｃｔｉｏｎｏｆｌｅａｒｎｉｎｇａｎｄａｓｓｏｃｉａｔｉｖｅｍｅｍｏｒｙｂｕｔａｌｓｏｃｌｅａｒｌｙｒｅｐｒｅｓｅｎｔｓａｋｉｎｄｏｆｓｔｒｕｃｔｕｒｅｄｋｎｏｗｌｅｄｇｅａｎｄｄｏｅｓｆｕｚｚｙｉｎｆｅｒｅｎ… 相似文献
10.
To describe the spatial tendency and complex relationship of geological structures, a digital modeling based on geographic information system and the visualization of hydroelectric engineering geology information are presented. The functions of information visual query, spatial cutting, section drawing, and coupled analysis with hydraulic structures are realized. The geologic model can match the attribute data with the shape data of geological structures, and organize the information for spatial query and analysis of the 3D model. With an application in Laxiwa hydroelectric project on the upriver of Huanghe River, the method provides a 3D parallel section view and query results of geoinformation, and 3D section views of geoinformation along axis of spillway tunnel,and along the 5th axis with underground structures, respectively. 相似文献
11.
A reinforcemen-based fuzzy neural network control with automatic rule generation RBFNNC) is pro-posed. A set of optimized fuzzy control rules can be automatically generated through reinforcement learning based onthe state variables of object system. RBFNNC was applied to a cart-pole balancing system and simulation resultshows significant improvements on the rule generation. 相似文献
12.
针对使用AutoCAD绘制机械图样时,表面粗糙度符号不能自动标注的问题,在Auto CAD2008中利用VBA二次开发环境,对AutoCAD2008平台上表面粗糙度标注进行了开发,创建了表面粗糙度的模块和属性。用户只需在标注系统界面上选择各项参数就能完成表面粗糙度的标注,其使用简便且界面友好。 相似文献
13.
谢艳芳 《天津职业院校联合学报》2013,(7):103-106
本文主要讲述了使用javadoc自动生成标准API文档的方法,其中包括为java源程序添加特定注释信息、标记的方法以及运行javadoc命令的常用方法,最后介绍了为HTML文档添加图像信息的方法。 相似文献
14.
贲黎明 《常熟理工学院学报》2011,25(8):115-120
介绍了用学生提交的文档与样卷比对进行自动阅卷的设计思路及方法,详细说明了题库设置和自动阅卷的实现方法,给出了其中的关键代码,并对系统的效果进行了测试及评估． 相似文献
15.
自动组卷策略是利用计算机自动完成试卷生成的一种方案,整个过程的人工投入少,在很大程度上解放了教师,提高了工作效率。能否自动组出满足用户要求的试卷,与组卷使用的算法紧密相关。采用遗传算法,按照选择编码方式、产生初始种群、计算自适应函数、进行遗传操作、试卷生成的过程,可完成自动组卷操作。 相似文献
16.
重视实践教学培养地质工程创新人才 总被引：7，自引：5，他引：2
本文从地质工程学科专业属性和社会需求出发,强调重视地质基础知识教育,重视学生工程素养和设计能力的训练,重视实践动手能力和创新能力的培养是十分重要的教育环节。特别针对我国西部地区人才需求和地质环境的特点,构建了“一中心、三层次、五训练”的新型实践教学体系;在实验教学内容上倡导以科研成果为基础开设新型实验项目,较好地实现了基础与前沿、经典与现代的有机结合,建立了一套适应学生能力培养、鼓励探索创新的实验考核方法和实验教学模式,为培养地质工程创新人才打下了坚实的基础。 相似文献
17.
高精度、高分辨率三维地震技术在我国多数矿区,不仅可以控制落差大于等于5m的断层,而且对大于1/2波长的地质异常体也具有较高精度的识别能力。以淮北矿区某煤矿为例,应用叠前时间偏移二次处理技术、地震属性技术及多属性聚类分析等方法,获得了研究区令人鼓舞的从未有过的对开采有重要工程价值的地质成果,证实了所用技术的先进性以及三维地震资料二次处理解释的必要性。 相似文献
18.
基于地震反射波法超前预测系统的原理及主要技术手段,以栋梁坡隧道工程为实例,针对隧道复杂的地质条件,施工过程中将超前地质预报和地质素描调查相结合,先对隧道全段范围内地形、地层岩性等进行全面核查,然后结合核查结果运用地震反射波法预报掌子面前方的节理裂隙发育情况,围岩完整性等地质信息。开挖后验证情况与预测结果基本一致,为后续预防突水塌方等隧道地质灾害事故的发生提供数据支撑,有效保证栋梁坡隧道的施工安全。 相似文献
19.
何剑 《温州职业技术学院学报》2014,14(3):56-60
为帮助教师快速、准确批改PowerPoint操作题,提出基于AutoIt3和VBA的PowerPoint操作题自动批量批改程序.通过对PowerPoint操作题划分评分点和对应分值,采用VBA编写自动批改代码,运用AutoIt3编写自动批量批改代码,实现PowerPoint操作题自动批量批改.通过比较表明,相较于教师人工批量批改,机器自动批量批改大大提高了批改效率和批改质量. 相似文献
20.
Cheng Tiexin Qi Xin Guo Tao 《东南大学学报》2008,(Z1)
The marking scheme method removes the low scores of the contractor‘s attributes given by experts when the overall score is calculated, which may result in that a contractor with some latent risks will win the project. In order to remedy the above defect of the marking scheme method, an outlier detection model, which is one mission of knowledge discovery in data, is established on the basis of the sum of similar coefficients. Then, the model is applied to the historical score data of tender evaluation for ci... 相似文献