Case Retrieval Method of Multi-parameter for Customized Product

The CBR (Case-Based Reasoning) usually is been used to accomplish customized products by variant design or reusable design.In the CBR,retrieve is very important.A simple case retrieval method is been brought forward to retrieve a opti- mal prototype based on using inputted multi-parameters,it can be programmed easily.An example has been proved this method can find optimal prototype for new design task efficiently.     

MATLAB PSB在电力系统暂态稳定中的仿真应用

运用MATLAB电力系统仿真程序SimPowerSystems构建了一个单机—无穷大系统模型,并在此基础上对电力系统稳定器、快速切除故障、故障限流器、单相自动重合闸等提高电力暂态稳定性措施的运行效果进行了仿真分析,可供师生在电力系统暂态分析课程教学过程中参考。     

二维Hilbert-Huang变换的分解方法研究

该文根据Hilbert-Huang变换的原理，给出了二维内蕴模式函数分量的递推形式，实现了二维Hilbert—Huang变换的分解方法，并在图像分解应用中取得了满意的效果，从而拓展了Hilbert—Huang变换的应用范围。通过把原始图像自适应分解成有限数量的子图像，图像的细节能清晰地被分解出来，这在数字图像处理中有很重要的意义。     

宁夏大学综合楼大体积混凝土施工

宁夏大学综合楼基础底板大体积混凝土施工过程中，通过采用掺入混合材料、缓凝型减水剂等外加剂优化混凝土配合比设计，调整混凝土浇筑顺序，进行表面处理，监控混凝土内部温度，加强混凝土保温养护；并利用冷却水吸收并带走内部水化热达到降低混凝土内部温度的原理，在基础混凝土中采取预埋冷却水管的措施，有效降低了混凝土的水化热，减少了混凝土的收缩变形，避免混凝土产生裂缝，保证了该工程大体积混凝土的施工质量。     

高速USB通信技术的研究与应用

提出了一种实现PC机与现场DSP控制器之间信息通信的设计方案。讨论了利用PDIUSBDl2接口器件实现串并转换和高速USB通信的原理，探讨了通信子系统软、硬件设计方案。在笔者开发的汽车发动机集中控制系统中使用效果良好。     

Plasma Induced Degradation of Benzidine in Aqueous Solution

The degradation of benzidine in aqueous solution by the low temperature plasma was examined. The results showed that the concentration of medium and the value of pH have an appreciable effect on the degradation of benzidine. What is more important is that iron ions acting as a catalyst play an important role in this reaction. For exploring the degradation mechanism of benzidine, some of the intermediate products were recorded by HPLC (high performance liquid chromatography).     

OSOD:一个油田开发规划优化决策系统

油田开发规划是一项复杂的系统工程,在一定投资下,要使得利润最大、产量最大,并且尽量降低成本,需要通过数学规划的方法进行科学合理的决策。为此,该文开发了油田开发规划优化决策系统,可以作为长期或短期油田开发规划的决策工具。     

基于Pocket PC的分布式程序设计

本文介绍了实现Pocket PC与PC之间的分布式程序设计的原理．并用实例详细介绍了进行分布式程序设计的主要方法。     

化学转化柱法测定气体中的微痕量水分的气敏分析仪的研究

采用特制LiAlH4催化反应柱,在(40～60)0C下,将气体中的微、痕量水转化成氢气.以气体中的微、痕量氢标准样品为标准,利用N型二氧化锡气敏半导体传感器作为检测器的气敏色谱方法,通过对转化的氢气进行准确测定,从而间接得出气体中微、痕量水的含量.研究表明,本文设计的催化反应装置选择性好,常温下反应快速、完全且稳定,一年来进行了近3000次试验考察表明,转化效率基本保持稳定,数据重复性很好.同时,气敏色谱法测水干扰因素少,进样量少,仅(1～2)ml,样品消耗少,仅(2～5)升,几分钟即可完成分析.该方法由于有微量氢标准气体作为相对标准,测水准确度高,不确定度为1%～10%.     

Tribological performance of filled PTFE‐based friction material for ultrasonic motor under different temperature and vacuum degrees

In this work, a glass fiber reinforced polytetrafluoroethylene (PTFE)‐based friction material with good properties for ultrasonic motor was fabricated. The effects of temperature and vacuum degree on the tribological behavior of the PTFE‐based friction material were investigated; the evolutions of friction‐wear modes and mechanisms were also discussed as function of temperature and vacuum degree. The results show that the delamination and fatigue wear are predominant under the effects of repeated shearing and dynamic contact under atmospheric environment. While wear mechanisms change from adhesive to abrasive and fatigue wear as it is cooled from 30 to ?60 °C at vacuum environment. Under high vacuum, adhesive wear was prone to taking place at room temperature for high frictional heat which increased the wear rate and extended the running‐in period. Experiment shows that the highest no‐load speed, output power, and holding torque of ultrasonic motor at room temperature under atmospheric environment are 220 rpm, 9.9 W, and 1.21 N m, respectively. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45358.