共查询到19条相似文献，搜索用时 109 毫秒
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王伟 《天津成人高等学校联合学报》2004,6(5):67-68,71
计算机集成制造系统CIMS和并行工程CE技术的发展和应用，对装配设计提出了更高的要求。实现产品设计与产品装配规划信息集成是实现产品计算机辅助自动装配的重要基础。装配顺序是一个重要而复杂的问题。通过研究，在介绍课题研究的背景及意义的基础上，可以分析出国内外装配设计及规划研究中常见的装配模型的建立方法。 相似文献
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王伟 《河北工业大学成人教育学院学报》2006,21(2):56-59
计算机集成制造系统CIMS和并行工程CE技术的发展和应用,对装配设计提出了更高的要求。实现产品设计与产品装配规划信息集成是实现产品计算机辅助自动装配的重要基础。装配设计是一个重要而复杂的问题。本文在介绍课题研究的背景及意义的基础上,分析了装配系统包括的各大功能子系统结构模块。 相似文献
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计小辈 《邢台职业技术学院学报》2011,28(5):85-87,97
装配是制造过程的最后环节,在产品的设计和装配阶段进行产品的预装配和装配分析,对提高产品质量,降低生产成本具有十分重要的意义。装配建模是装配设计的基础,本文介绍了几种装配模型的建立方法,从而为实际的装配过程提供重要依据。 相似文献
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计算机辅助装配工艺设计能够大大提高现代工业生产的效率和质量,对其进行探究有着非常重要的实践意义。从装配模型、装配顺序的设计以及对装配顺序的检验和优化着手,对其中的几点关键技术了进行了分析,希望对计算机辅助装配工艺设计的发展提供帮助。 相似文献
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本文设计并实现了“SGI图形工作站”虚拟装配系统。虚拟装配是虚拟现实技术的重要应用,EONStudio是模块化多用途的三维交互式仿真软件开发工具。我们提出了实现“SGI图形工作站”虚拟装配系统的具体方案及技术路线,运用三维建模技术和交互式虚拟现实设计软件——EONStudio,构建了虚拟装配系统的结构和组成模块,完成了“SGI图形工作站”虚拟装配系统的各构件的交互和整体的集成。 相似文献
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三维设计系统中零部件虚拟装配及运动仿真 总被引：2，自引：0，他引：2
借助虚拟装配技术及运动仿真技术，在产品的设计阶段就可以清楚地了解设计结果的装配性能及其运动状况。本文主要讨论了建立在零部件分层装配技术基础之上的虚拟装配技术，以及建立在参数化技术之上的运动仿真，同时以起重机为例介绍了在三维系统中的分层装配和运动仿真的实现过程。 相似文献
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The design of balanced assembly lines, especially when considering workforce, material, and cycle time factors, is an important managerial decision‐making activity in manufacturing firms. Numerous active learning activities are available to assist instructors in teaching assembly line balancing to students. While effective in improving student engagement, they require considerable planning and expense on the part of instructors, and they may be difficult to implement in inflexible teaching spaces and lecture‐oriented curricula. We present a new approach to teaching line balancing using online videos depicting an assembly process. Students design an assembly line by determining themselves how to separate and time tasks, rather than by modifying an existing configuration. To save valuable classroom time, students complete a portion of the activity outside of class. This blended learning approach allows for all students to be engaged in the activity, both in and out of class. Furthermore, a controlled study showed that compared to the traditional lecture format, it better equips students to address less tangible aspects of line balancing, such as ergonomic and workforce factors, material handling considerations, and changing cycle time. With the online content for this activity completely developed and available, other instructors can easily implement this approach within their courses. 相似文献
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微机原理实验课程内容的层次化设计 总被引：1，自引：0，他引：1
"微机原理"课程具有实践性强的特点,实验教学环节占有重要的地位。文章就实验课程内容的设计给出了3个层次化的方案,即汇编语言编程实验、接口技术实验和系统综合设计实验。 相似文献
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V. J. Kalungwizi S. M. Gjøtterud E. Krogh A. Mattee A. K. Ahmad 《Educational Action Research》2018,26(3):403-419
Engaging local actors in Environmental Education activities seems to be an important condition for environmental sustainability. Lack of common purpose among local and external researchers constrains the engagement. Following these insights, we implemented a participatory action research project related to tree planting as part of creating an Environmental Education programme at Ilonga Teacher Training College, surrounding primary schools and villages. The purpose of the initial phase of the project was to contextualize an action plan as a strategy to engage local actors in the change process from the beginning of the project. The research questions were: How can we engage local actors in participatory action research addressing resource constraints for EE; and what are the results of the participatory planning process? To answer these questions, we mapped environmental resources and challenges in the chosen area. Thereafter, we organized an empowerment process through Focus Group Discussions and a workshop discussing the challenges and opportunities available for successful implementation of the project. These discussions formed the foundation for creating a plan for implementing the EE project. In this paper, we present the results of the planning strategies, and discuss factors contributing to the success of the initial phase of the project. We found that stakeholders’ trust and sense of project coherence were key motivating factors for the development of a collaborative planning process and learning through initial actions. 相似文献
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本文对VRML中交互行为的机理进行了研究,详细阐述了如何通过EAI(外部编程接口)、Script节点来实现基于VRML的虚拟装配中场景与外部世界的交互技术,包括如何实现装配过程中零件碰撞检测、装配顺序判断以及零件实时编辑等功能,并设计了一个二级圆柱齿轮减速器虚拟装配系统进行验证,取得了良好的效果. 相似文献
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WU Xue-dong SONG Zhi-huan 《浙江大学学报(A卷英文版)》2007,8(10):1604-1613
Determination of relative three-dimensional (3D) position, orientation, and relative motion between two reference frames is an important problem in robotic guidance, manipulation, and assembly as well as in other fields such as photogrammetry. A solution to pose and motion estimation problem that uses two-dimensional (2D) intensity images from a single camera is de- sirable for real-time applications. The difficulty in performing this measurement is that the process of projecting 3D object features to 2D images is a nonlinear transformation. In this paper, the 3D transformation is modeled as a nonlinear stochastic system with the state estimation providing six degrees-of-freedom motion and position values, using line features in image plane as measuring inputs and dual quaternion to represent both rotation and translation in a unified notation. A filtering method called the Gaussian particle filter (GPF) based on the particle filtering concept is presented for 3D pose and motion estimation of a moving target from monocular image sequences. The method has been implemented with simulated data, and simulation results are provided along with comparisons to the extended Kalman filter (EKF) and the unscented Kalman filter (UKF) to show the relative advantages of the GPF. Simulation results showed that GPF is a superior alternative to EKF and UKF. 相似文献
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沈晓敏 《中山大学学报论丛》2000,20(3):48-59
浙江省议会成立于1913年2月,国民党议员约占四分之三,但其内部不能团结一致,大多数人与革命党并很深的渊源。在二次革命前,浙议会与国民党的政治立场基本一致,积极参与反对袁世凯政府加强中央集权和进行专制独裁活动的各项斗争,是全国反袁队伍中的一支生力军。二次革命发生后,都督朱瑞以保境安民、局外中立为既定方针。浙议会大多数议员在关键时刻不敢挺身而出,没能通过一个以省议会的名义宣布浙江反袁独立的议案,仅仅“制造“了一个有16位议员具名的要求朱瑞宣布独立的“公函”。国民党在占有绝对优势的浙议会内没能取得强有力的支持,议会内还存在着一种普遍的自保求安心理,正预示着二次革命的结局。 相似文献
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编写和调试汇编语言程序要比编写和调试高级语言程序复杂的多,因此目前汇编语言的应用不如高级语言广泛。但是由于汇编语言有占用存储空间小,运行速度快,可直接控制硬件等独特的优点,使得在应用中又不可缺少,因此产生了如何在高级语言程序中嵌套汇编语言的问题。作者设计了一些常用的几种高级语言与汇编语言嵌套的方法。 相似文献
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The purpose of this study was to address this problem by applying a new hybrid fuzzy multiple criteria decision-making model including (a) using the fuzzy decision-making trial and evaluation laboratory (DEMATEL) technique to construct the fuzzy scope influential network relationship map (FSINRM) and determine the fuzzy influential weights of the fuzzy DEMATEL-based analytic network process (DANP) as well as (b) the modified VIKOR method combining fuzzy influential weights of fuzzy DANP to integrate each criterion of fuzzy performance gaps into dimensions and, overall, to examine the interdependent and feedback problems among various dimensions/criteria of cloud e-learning services for creating the excellent improvement plan based on the FSINRM to implement the strategic orientations. An empirical case of the network communication service industry was used as an example to show the proposed methods and ultimately present the most effective improvement plan for decision-makers to achieve the aspiration level. 相似文献
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孙博 《连云港师范高等专科学校学报》2003,(1):45-48
CMM认征是软件企业走向标准化，提高竞争力的行之有效的途径。但仅有CMM是不够的，必须与PSP相结合。PSP是一种可用于控制、管理和改进个人工作方式的持续自我改善过程，是一个包括软件开发表格、指南和规程的结构化框架。推广PSP需要以认真的实践为基础，井努力总结亲身经历的经验和教训。 相似文献