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Most electronics products use PCB to carry electronic circuits. This paper classifies information contained in PCB-based electronic circuits into several models: geometry model, physics model, performance model and function model. Based on this classification, a multi-information model of product is established. A composite model of product is also created based on object-orientation and characteristics of the product. The model includes a 3D geometry model, a physics model with integrated information that can be divided into microscopic and macroscopic information, a generalized performance model and a function model that are from top to bottom. Finally, a multi-unit analysis is briefly discussed. 相似文献
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Based on the modal analysis theory and by using the dynamics finite element analysis model of a three-dimensional assembly circuit module, dynamic characteristics of circuit module have been studied, including both natural characteristics analysis and dynamic responses analysis. Using a subspace method, modal analysis is first carried out. The first 6 orders of natural frequencies and vibration modes are obtained. Influence of the number of the Z-shaped metal slices on dynamic characteristics of the entire structure is also studied.Harmonic response analysis is then conducted. The steady-state response when the circuit module is subjected to harmonic excitation is determined. A curve of the response values against frequencies is obtained. As a result, the optimal number of Z-shaped metal slices can be determined, and it can be assured that the three-dimensional assembly circuit module has good performance in terms of the dynamic characteristics. 相似文献
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地方普通高校应用型人才培养方案改革应注意的问题 总被引:5,自引:0,他引:5
高校人才培养方案改革必须是根据社会经济和科技发展对人才培养的实际需要,遵循高等教育发展的规律,符合学校自身发展实际和对学校发展及其提高人才培养质量有利的、科学的和可持续的改革。对于地方普通高校面向应用型人才培养的方案改革而言,更是如此。为此,在探索人才培养方案改革时,应该首先在思想和观念上明确学校追求的是什么样的高等教育和人才培养目标,明确人才培养的价值观、质量观和发展观导向,明确人才培养方案改革涉及的因素及其如何科学处理它们之间的关系,从而把握好改革的方向和尺度。 相似文献
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机械类专业教学改革的思考 总被引:7,自引:1,他引:6
针对机构类专业的教学改革具有改革面宽、改革内容多、改革难度大等特点,结合教改的理论研究与实践体会,提出对改革中若干问题的思考。 相似文献
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结合高等职业技术教育的实践,对高等职业技术教育的办学模式、管理模式等问题进行了总结和分析,着重介绍并探讨了“统一核算型、二级办学实体型、联合办学规范约束型”三种管理模式。 相似文献
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深化特色上水平 服务地方新发展 总被引:1,自引:0,他引:1
优化结构办出特色和增强社会服务能力是《国家中长期教育改革和发展规划纲要》对高等教育提出的重要目标。近年来为提高办学质量和学校竞争力,我国地方高校在国家政策的指导下努力寻求自身变革,强调特色立校、特色兴校和特色强校。经过了几十年的发展与建设,经过了合格评价到水平评估 相似文献