曲轴智能设计专家系统的灰色映射射靶理论和光弹性验靶方法

本文依据基于知识的设计理论和灰色模糊方法建立了曲轴设计的专家系统。视该系统为两多维空间灰色映射靶的射靶问题，从而提出了该系统构成及其相应的搜索策略，并以船用６１６０Ａ型柴油机曲轴设计为实例，建立了６１６０Ａ曲轴的改型设计６１６０Ｂ曲轴的专家系统，采用了光弹性试验验靶，验证了它的正确性和有效性，为曲轴设计提供了一种智能型方法。     

汽轮机滑动轴承设计专家系统的开发

采用面向对象的设计方法和专家系统理论，以《汽轮机径向滑动轴承性能计算》（ＪＢ／２２０９－８４）为知识集，用Ｃ＋＋语言开发了一个基于Ｗｉｎｄｏｗｓ的面向对象的滑动轴承设计专家系统ＪＢＥＳＦＷＩＤ。该系统完成了从轴承结构型式选取、经验参数选择、性能计算、结果分析评价和输出的全过程。面向对象的方法和Ｗｉｎｄｏｗｓ的应用，使该系统具有良好的基于图形的人机界面，操作简单，便于维护和使用。     

内燃机企业知识工程的开发和应用

本文介绍了银轮技术信息系统中知识工程(专家系统加知识库)的开发与应用。知识工程是在计算机辅助工程，企业内部网，工作流等技术环境上建立起来的，已开发的机油冷却器设计专家系统分为三个子系统，根据客户(指主机厂)输入要求进行设计和验算，并按一定的工作流工作。开发中应用了国外近十年工作流程管理、协同工作技术、企业内外的电子商务、知识库、人工智能和专家系统等技术。开发完成的正向和逆向推理机还可用于多种行业的不同领域，作为建立各自专家系统的开发工具。     

机械工程专家系统技术的研究进展

从知识表示，知识库构建，知识获取和推理模式等四个方面介绍了机械工程专家系统技术的研究进展，并讨论了基于Internet的专家系统以及专家系统与先进制造技术的集成的特点、功能和应用。     

珩磨工艺设计优化及智能诊控专家系统

本文研究运用专家系统实现对珩磨进行系统的工艺设计、工艺诊断以及工艺控制，解决发动机、工程机械中精密偶件孔珩磨技术难点、弱点，通过专家系统丰富的知识积累、科学的推理、准确的判断，引导人们采用先进科学的珩磨工艺、排除人工操作影响因素，获得理想的珩磨网纹结构，最终实现珩磨加工业的技术飞跃。     

基于专家系统的气缸套CAPP系统的设计

计算机辅助工艺规程设计作为设计和制造之间的桥梁在计算机集成制造系统(CIMS)中起着关键的作用。本文着重介绍了气缸套的计算机辅助工艺规程设计系统的设计思想，说明了以专家系统技术为基本方法开发的气缸套计算机辅助工艺规程的设计系统结构和设计方法，同时说明了基于专家系统的CAPP是今后的一个发展方向。     

基于铁谱信息的发动机故障诊断专家系统研究

简要介绍了铁谱分析技术，并对铁谱分析技术和图像识别技术在发动机故障监测中的应用进行了研究，构建了发动机的故障诊断专家系统，介绍了在Delphi6平台下开发专家系统的总体结构、设计思路及实现方法，详细阐述了各模块功能、知识的表示方法和推理策略，实现了对发动机运行状态及零部件失效的智能监测与诊断。     

汽轮机故障诊断知识的人工获取

介绍了汽轮机故障诊断专家系统中的知识的类型和知识取的方法，论述了人获取诊断知识的过程，讨论了知识获取时应注意的问题，为专家系统诊断规则的形成提供了基础。     

基于模糊关系矩阵推理的发动机故障诊断专家系统

描述了一个在ＷＩＮＤＯＷＳ环境下开发的故障诊断专家系统的设计与实现,并介绍了有关模糊知识表示与推理的研究工作,详细介绍了该系统结构,知识表示与获取,推理机制的设计实现方法。     

300MW汽轮发电机组状态监测与故障诊断专家系统：知识获取与机器学…

针对大型旋转机械设备的故障诊断专家系统的知识获取与机器学习问题进行了研究，系统地介绍了知识获取与机器学习系统的构成，性能及功能，并对该系统的事例学习模块，示例学习模块，神经网络学习模块及规则的学习与修正模块等主要模块设计与实现的思想作了简要的介绍。     

新型消能工的计算机辅助几何设计

宽尾墩、异型挑坎、窄缝挑坎是70年代末以来我国水电建设中涌现出的三种新型消能工,计算机辅助几何设计(CAGD)是高技术领域最有活力、最有生气的新技术之一,本文介绍用CAGD技术进行这三种消能工的体型设计,供科研与设计人员参考.     

Design and performance of roofs

The factors influencing roof design with respect to energy conservation are surveyed. In particular low-pitched (～15° inclination) roofs have been shown to possess thermal insulation advantages. Thus relatively low-pitched, northerly facing roofs, together with 61° pitch (i.e. the optimal inclination of plane, solar-energy collectors for maximum winter gain in UK latitudes) southerly facing roofs will probably become more commonplace.     

Design of a hydrogen community

This paper discusses the conceptual design of a scalable and reproducible hydrogen fueling station at Santa Monica, California. Hydrogen production using renewable energy sources such as biogas, which accounts for 100% of the total production, has been discussed. The fueling station consists of a direct fuel cell (DFC) 300 fuel cell for on-site generation of 136 kg/day of hydrogen and 300 kW of electric power, five hydrogen storage tanks (storage capacity of 198 kg of H₂ at 350 and 700 bar), four compressors which assist in dispensing 400 kg of hydrogen in 14 h, two hydrogen dispensers operating at 350 bar and 700 bar independently and a SAE J2600 compliant hydrogen nozzle. Potential early market customers for hydrogen fuel cells and their daily fuel requirements have been computed. The safety codes, potential failure modes and the methods to mitigate risks have been explained. A well-to-wheel analysis is performed to compare the emissions and the total energy requirements of conventional gasoline and fuel cell vehicles.     

增压压气机的最优设计研究

本文将离心增压压气机的设计问题表述为其空气动力学损失极小化,比面积(质量流率/动叶进口面积)最大化的多目标非线性数学规划问题.求优中考虑了多种气动与机械约束条件.文中介绍了压气机性能估算模型,给出了最大效率、最大比面积以及效率、比面积权衡最优条件下的算例.结果表明,本方法是有效且实用的.     

一种废气再循环系统的设计

介绍了一种用于化油器式汽油机的废气再循环装置的设计思路和方法、结构和功能特征,并详细讨论了膜片参数、弹簧参数对废气再循环率的影响。对装置的控制方式进行改动后也可用于汽油喷射式发动机或柴油机中。     

挠性膜片联轴器优化设计

本文改进了Ｐｏｗｅｌｌ的无约束优化方法,提出了有效的约束函数法。用此法研究了膜片联轴器在满足强度、刚度、振动等条件下,以重量轻,刚度最小为目标的优化设计计算。基于膜片的强度、刚度是在有限元分析基础上进行,必须要解决有限元前置处理（自动分单元、自动分载荷）和后置处理（绘等值线）等一系列的问题,开发了一套比较完善的膜片外形优化设计的软件系统（简称ＯＤＦＣ系统）。     

Design of miniature loop heat pipe

In the present study, the loop heat pipe (LHP) was miniaturized for application to electronic cooling. According to the capillary limitation, the wick structure parameters that would affect the heat transfer capacity were analyzed theoretically. Among the various wick parameters, this study especially investigated the effect of wick thickness, which has rarely been mentioned in the literature. Here, various thicknesses were analyzed theoretically and then tested experimentally. The results showed that the temperature on the evaporator wall dropped with decreasing wick thickness. This effect would lead to the raising of heat transfer capacity and the descending of thermal resistance. According to the analysis and the practical demand for electronic cooling, a miniature LHP was fabricated with the evaporator outer diameter of 13 mm and the evaporator length of 50 mm. The testing results showed that, at the allowable working temperature of 80 °C, the maximum heat transfer capacity was up to 200 W and the thermal resistance was 0.17 °C/W. © 2003 Wiley Periodicals, Inc. Heat Trans Asian Res, 33(1): 42–52, 2004; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/htj.10133     

Design of composite tidal turbine blades

Tidal turbine blades are subjected to significant thrust and torsional loadings due to the high density of the seawater in which they operate. These thrust loadings lead to high bending moments at the blade root, which can prove to be a serious design constraint for these devices and can have implications with respect to cost-effectiveness and scalability. This work presents a combined hydrodynamic-structural design methodology for a commercial scale (1.5 MW) tidal turbine. A hydrodynamic analysis of the blade is carried out to determine force distributions along the blade span under normal and extreme operating conditions. Using output from the hydrodynamic model, a pre-processor for computing blade structural properties is used to determine the strain distribution along the blade spar caps. The strain distributions from this analysis are then compared with a finite element model of the blade which is then used to compare the structural performance of glass fibre reinforced polymer (GFRP) and carbon fibre reinforced polymer (CFRP) as spar cap materials.     

中美建筑结构可靠度体系的对比研究

通过比对美国国家标准局《为美国国家标准A58拟定的基于概率的荷载准则》与我国现行可靠度设计标准(GB 50068—2001和GB 50153—2008)的有关规定,分别从可靠度水平的度量指标、可靠度水平的设置原则、影响结构可靠度的不定因素、可靠指标的量值、保证工程可靠度水平的举措等方面对比分析中美两国可靠度体系的异同,为工程概率安全分析以及国内规范的修订提供参考依据。     

Design optimization of solar cooker

Various designs of solar cookers have been theoretically investigated with a view to optimize their performance. Starting from a conventional box type cooker, various combinations of booster mirrors have been studied to arrive at a final design, aimed at providing a cooker, which can be fixed on a south facing window (for countries of northern hemisphere, mainly situated near the tropic of Cancer). This cooker, with a rear window opening, may provide higher cooking temperature for a fairly large duration of the day. Two or three changes in positions of the side booster mirrors, without moving the cooker as a whole has been proposed. The new design has been experimentally implemented and compared with a conventional box type solar cooker. Besides the convenience of a rear window opening, the cooker provides temperatures sufficiently high to enable cooking two meals a day.