Sol-Gel Synthesis of Palladium-Doped Silica Nanocomposite Fiber Using Triton X-100 Micelle Template and the Application for Hydrogen Gas Sensing

Palladium-doped silica nanocomposites were synthesized via a sol-gel technique combined with a template of Triton X-100 micelle. The freshly prepared sol sample of Pd-doped silica nanocomposites was investigated by TEM. Determined from the TEM image, the sizes of the Pd nanoparticles are narrowly distributed, which are around 30 nm in diameter. The prepared sol solution of the sample was injected into a Tygon Microbore Autoanalysis tubing. After 14 days gelatinization, a transparent porous optical fiber was obtained. The response of the fiber to hydrogen gas was tested by using a fiber-optic spectrometric method. The palladium-doped silica nanocomposite fiber is sensitive upon exposure to hydrogen gas and the response is reversible. This palladium-doped silica nanocomposite fiber can be applied as a new kind of hydrogen gas sensor     

安钢集团信息化实施策略探讨

近年来，为了更好地应对新的市场挑战，钢铁企业都在积极推进信息化建设，以实现管理提升、效益提升的目标。本文结合安钢集团的实际情况，对信息化实施策略进行初步的探讨，希望能对企业信息化建设有所借鉴。     

酚醛树脂复合板在热连轧机中的应用

重点分析了现有F7机架出口导卫装置的情况。原导卫材料是由铸钢制造 ,由于摩擦和高温常常引起热连轧带钢表面划伤 ,根据现场实际情况用酚醛树脂复合板替代铸钢导卫装置。实践表明 ,这种改造即可行又可靠 ,并取得了好的效果     

管道完整性管理标准及其支持体系

通过对美国管道完整性管理标准ASME B31.8S和API 1160内容的论述，总结了管道完整性管理标准的3个特点：①管道完整性管理标准是一种过程标准；②管道完整性管理标准提供了一种管道运行管理的模式和理念，反映了当前管道安全管理从单一安全目标发展到优化、增效、提高综合经济效益的多目标趋向；③完整性管理是以管道安全为目标的系统管理体系,管道完整性管理标准是一种体系规范。从管道完整性管理系统的角度，列举了美国管道完整性管理的主要支持性标准、规范和法律文件。最后对国内管道完整性管理研究提出了建议。     

具有迭代结构的时频分布计算方法

本文讨论了时频分布中的迭代算法的问题.通过选择特殊的计算窗口,时频分布的迭代运算形式能够有效地利用前面数据段的分析结果,从而避免了重复性的运算,使得计算效率得到提高.本文对原有的利用单边窗口的时频分布迭代算法的性能进行了分析,提出了采用对称型窗口的迭代计算形式.与单边窗口相比,双边形式的计算窗口不但可以有效地提高时频表示精度,同时还能够更为准确的表示信号的瞬时频率.文章对各项理论分析结果提供了相应的仿真实验结果.     

Design of Millimeter Wave TFMS Bandpass Filter

In this paper, a Ka-band thin film microstrip line(TFMS) filter with multi-layer structure on silicon substrate is introduced. The simulated results show that it is possible to design compact millimeter-wave filter on silicon substrate with process compatible to current VLSI technology.     

基于16位单片机的电磁平板硫化机控制系统

介绍一种基于 16位单片机的电磁平板硫化机控制系统,该系统能有效地提高现场控制的实时性和程序运行的稳定性     

A generalized equation for the prediction of melting temperatures of homopolymers and copolymers

A generalized equation was derived to calculate the melting temperatures of homopolymers and copolymers. The Gibbs‐Thomson equation for homopolymers and a modified application to copolymers were derived using the proposed equation. The melting temperature T_m⁰ in the Flory equation corresponds to the melting temperature T_m^C,∞ of copolymer crystals with stems of infinite length. Also, T_m^C,n*, the melting temperature for copolymer crystals with stems containing the maximum possible number of structural units, n*, should be used instead of T_m⁰ as the basis of supercooling in crystallization. The proposed equation shows good agreement with experimental data for α‐alkene‐ethylene homogeneous copolymers.     

基于网络的家电产品故障诊断系统研究

介绍了基于网络的家电产品故障诊断系统的硬件拓扑结构、软件平台及系统开发。系统在硬件上采用了多种网络平台搭建方式及综合连接技术，软件上采用了IDRS诊断模型和基于事例的最新诊断技术。这也是诊断研究和应用的新领域。