电喷发动机进气歧管设计开发新方法

本文利用GT-POWER模拟软件建立发动机工作过程计算模型,对发动机进气系统进行优化计算,获取进气歧管关键结构数据,然后利用Pro/E软件进行三维造型设计,并将三维数据模型转化为STL数据格式,传至快速原型制造中心,制作快速原型样件,再在发动机台架上进行实机测试,考核设计指标。开发过程中采用了当前汽车制造行业最先进的计算、设计和制造工具,既促进了新技术在开发工作中的应用,同时也提高了开发工作的质量和效率。     

漫湾电站溢流表孔掺气减蚀的试验研究

漫湾水电站溢流表孔的掺气减蚀设施，通过不同比尺的模型试验研究，优化出以坎、槽组合型较好。根据试验成果分析，并结合施工现场实况，为设计推荐掺气设施的布置型式、位置、体型尺寸均为工程采用井已建成。从１９９４年汛期原型观测的成果表明：掺气浓度沿程分布、通气孔风速、进气量、空胶负压及气水比等项成果与模型试验规律基本一致，均满足规范要求。说明设计的掺气设施的体型、尺寸是合理的、有效的。     

AJAX技术在WebGame中的应用

介绍如何在WebGame中使用AJAX技术。WebGame是一种基于互联网技术并以在线方式运行的游戏系统。AJAX使客户端能在詹台访问服务器并可按需求取回数据．从而避免了整个页面的刷新。这为交互较多、频繁读取数据的WebGame提供了一个很好的解决方案。     

Lexical misunderstandings and prototype theory

This paper uses examples of conversational understandings, misunderstandings and non-understandings to explore the role of prototypes and schemata in conversational understanding. An investigation of the procedures by which we make sense of lexical items in utterances by fitting prototypes into schemata is followed by an examination of how schemata are instantiated across conversational sequences by means of topics. In interaction, conflicts over meaning illuminate the decisive role of social and cultural factors in understanding. Overall, understanding is seen to be critically dependent on principles of categorisation and contrast, which form the basis of both cognitive and sociocultural means of organisation.     

西方建筑理论中的原型思想

“原型”是西方建筑理论文献中的经常出现的概念。该文回顾了西方建筑理论中的原型思想,批判的阐释了其对建筑理论和建筑创作的意义。     

交会对接仿真系统的原型技术研究

研究了在交会对接仿真系统中应用原型技术的方法,分析了交会对接仿真系统的系统需求,概述了原型法的一些基本概念,研究了面向对象技术和原型技术的融合问题,分析了基于面向对象的原型法在交会对接仿真系统中的应用问题,并在最后建立了一个交会对接仿真系统的进化型原型框架.对此原型框架的仿真表明,原型法在交会对接仿真系统中的应用是成功的.     

An operational high temperature thermal energy storage system using magnesium iron hydride

Metal hydrides have been demonstrated as energy storage materials for thermal battery applications. This is due to the high energy density associated with the reversible thermochemical reaction between metals and hydrogen. Magnesium iron hydride (Mg₂FeH₆) is one such material that has been identified as a thermal energy storage material due to its reversible hydrogenation reaction at temperatures between 400 and 600 °C. This study demonstates an automated thermal battery prototype containing 900 g of Mg₂FeH₆ as the thermal energy storage material with pressurised water acting as the heat transfer fluid to charge and discharge the battery. The operating conditions of the system were optimised by assessing the ideal operating temperature, flow rate of the heat transfer fluid, and hydrogen pressures. Overall, excellent cyclic energy storage reversibility was demonstrated between 410 and 450 °C with a maximum energy capacity of 1650 kJ which is 87% of the theoretical value (1890 kJ).     

快速原型技术现状与发展趋势研究

该文简要介绍了快速原型技术的原理、快速原型技术的特点,阐述了国内外现状及发展趋势。     

虚拟样机技术在XK714研制中的应用

介绍了XK714的主要技术参数及设计特点，对关键零部件进行了有限元分析。基于虚拟样机技术，进行了零件的实体建模、样机的虚拟装配、运动学和动力学仿真。     

逆向工程及其关键技术

在对逆向工程技术所包含内容进行分析的基础上，分析了逆向工程技术的运用领域，并阐述了在实际工程运用中涉及的关键技术。