4 resultados para NORDSIECK NOTATION

em Chinese Academy of Sciences Institutional Repositories Grid Portal


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自然交互是指用户可以用自己熟悉的日常技能与计算机进行交互。中国有大量的音乐爱好者使用简谱,但是针对简谱编辑的编辑软件却相对较少,并且现有软件的交互方式不够自然,降低了用户对软件的使用效率。他们需要一种更自然、更方便使用的简谱编辑软件。该文介绍了一个基于笔式输入的简谱编辑器原型系统的设计和实现。基于对现有软件、简谱特性和可利用的新技术的综合分析,设计并实现了这个原型系统。对此原型系统进行了非正式的用户实验之后,对结果进行了分析,并提出了修改的方案。

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The flow behaviors of CH3CCl2F hydrate slurry with volume concentration of 10-70% were studied in a new built flow loop with a diameter of 42.0 mm and length of 30.0 m. Morphologies of the fluids from slurrylike hydrates to slushlike hydrates with increasing of hydrate volume concentration in pipeline were observed. Pressure drops in pipeline also were studied and an exceptional pressure transition zone with hydrate volume concentration between 30% and 40% was found for the first time, which can be used as a notation to judge if the pipeline runs safely or not. Fanning friction factors of the hydrate slurries with all hydrate contents tend to constants between 0.38 and 0.5, which depend on the volume concentration in slurries, when the velocity reaches 1.5 m/s. A simple relation to estimate the pressure drop of hydrate slurry in pipeline was presented and verified. Experimental results were compared to the estimated results, which showed a good agreement. 

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探讨了自动化与制造业的产生和互促发展过程 ,论述了自动化制造系统的形成和不同发展阶段的内涵及重大作用 ,指出自动化技术与制造技术是驱动自动化制造系统发展的两个轮子 ,不能忽视任何一个侧面 ,自动化研究与制造技术研究相结合是发展先进制造技术的必由之路

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本文针对我国计算机绘制机械图领域内的现状,提出了一种易于掌握的机械图描述语言,以及一个相应的功能较强的绘图系统。该系统便于图形输入,并具有图形的平移、旋转、映射等功能,和较强的剖面域的处理能力。系统带有一个标注专用的笔写式字符库(包括汉字和专用符号)。该系统用 FORTRAN 语言写成,便于向大、中型计算机和存储容量较大的微型机移植。