WATCHDOG在汽轮发电机组状态监测系统中的应用

本文介绍一种适合于汽轮发电机组状态监测系统的“看门狗”功能,它可以在很短时间内发现由于外界干扰而导致的计算机的锁死,并马上自动使计算机恢复正常运行。从而提高在线状态监测系统的可靠性。     

卷轴式贴标签机剥离机构的优化设计

探讨了用解析的方法解决压敏标签贴标签机的剥离刀口的优化设计问题，分别提出了剥离刀口处的张力功、摩擦功、弹塑性变形功和剥离功的计算模型，并对结果进行了讨论，结果表明，剥离刀口的曲率半径存在一个最优值，此值分别与纸带预张力、压敏胶的特性、标签的瞬时剥离宽度、底纸带特性等有关。     

Carnot comparison of multi-temperature level absorption heat cycles

Comparison of different absorption heat cycles is not always made on the correct manner. This also includes comparison of an ideal absorption cycle with a mechanical analogy. A new Carnot model operating with two heat engines and two mechanical heat pumps is defined to be the correct and logical way to describe the mechanical analogy for an absorption heat pump and an absorption heat transformer. General equations for the Carnot coefficient of performance, COP_r, are exemplified and simulated for an absorption heat pump and an absorption heat transformer, and an entropy flow fraction diagram is introduced. The important fact that the absorption heat cycles must operate under the same conditions when they are compared is discussed.     

半导体元件清洗技术浅谈

随着社会的进步和科学技术的迅猛发展,对洗净技术的要求也越来越高。清洗方式多种多样,但最主要的是突出在喷射清洗和超声波清洗两大方面,应用于全国各行各业,并且也得到了明显进步。     

BKX-Ⅰ型并联机床的谐响应分析

应用有限元分析软件(ANSYS),对BKXⅠ型并联机床进行谐响应分析,分别得到了机床各节点沿机床的虚拟轴X、Y和Z向的位移谐响应曲线。在此基础上,还分析了该机床的谐响应规律,并明确了谐响应的特点,为改善此类机床的动态特性提供了一定的参考依据。     

变频器在龙门铣床上的应用

介绍龙门铣床的直流调速控制系统的改造方案，根据龙门铣床工作台运动过程及原直流电机的容量来选择交流电机和变频器并对变频器的功能进行设定。     

台达变频器在纺织织带盘带机上的应用

盘带机是纺织织带成品分卷设备，需要使用到收放卷控制。本文基于台达变频器在盘带机上的应用案例，论述盘带机自动化系统设计调试过程以及遇到的问题分析。     

Enhancing cognitive radio systems with robust reasoning

Cognitive radio systems dynamically reconfigure the algorithms and parameters they use, in order to adapt to the changing environment conditions. However, reaching proper reconfiguration decisions presupposes a way of knowing, with high enough assurance, the capabilities of the alternate configurations, especially in terms of achievable transmission capacity and coverage. The present paper addresses this problem, firstly, by specifying a complete process for extracting estimations of the capabilities of candidate configurations, in terms of transmission capacity and coverage, and, secondly, by enhancing these estimations with the employment of a machine learning technique. The technique is based on the use of Bayesian Networks, in conjunction with an effective learning and adaptation strategy, and aims at extracting and exploiting knowledge and experience, in order to reach robust (i.e. stable and reliable) estimations of the configurations' capabilities. Comprehensive results of the proposed method are presented, in order to validate its functionality. Copyright © 2007 John Wiley & Sons, Ltd.     

含有复合阻尼结构的压力波制冷机振荡管内流动分析

通过对含有复合阻尼结构的压力波制冷机振荡管内的流场分析，详细讨论了激波在接受管内的行为，数值计算同时表明：含有两道复合阻尼结构加上激波吸收腔完全可以将激波降低到工程上可以接受的程度。     

板坯连铸机二切短流程生产线的开发和应用

3^#板坯连铸机二切工序一直不能正常工作，采用了在线切割工艺，根据切割条件和切割周期等参数，结合板坯连铸出坯线短、车间小的特点，确定二切机的位置在距一切终止点15m处。改进了清渣系统，采取了升降挡板和定尺板相结合的定尺方式，设定不同的辊道运输速度等措施，保证了二切设备的正常运行，实现了板坯的热送热装．