柴达木盆地北缘的右行走滑冲断系统及其动力学

通过对于断裂系统分析和地球物理资料的解释,证实了柴达木盆地北缘西段的主要构造形成时间为上新世以后,变形样式为一系列右行走滑冲断构造。走滑冲断构造带内部的断层在平面上呈分支复合,剖面上表现为正花状构造,断层上、下盘地层层序无法直接对比。右行走滑冲断构造形成于南祁连由北向南的斜向推覆作用,而主要应力来源于柴达木地块北缘由南向北的陆内俯冲作用。用一个运动学模型解释了柴北缘的右行走滑冲断作用机制。     

Preparation of nanosized titania powder via the controlled hydrolysis of titanium alkoxide

By controlling the hydrolysis of titanium butoxide, followed with or without an ethanol washing process, the preparation of nanoscale titania powder was studied in detail. The characteristics of different powders produced by the direct precipitation (without an ethanol wash) and ethanol wash processes were studied by X-ray diffraction, transmission electron microscopy, BET, thermogravimetry and differential thermal analysis techniques. By comparison, it was found that both the direct precipitation and ethanol wash methods can obtain slightly agglomerated nanoscale titania powders of less than 15 nm, but the ethanol wash can further reduce the agglomeration. The particle sizes of titania powders can be modified while still retaining the anatase structure.     

Effect of processing history on the properties of Ag-based tapes

The Bi-system tapes and coils were prepared by the powder-in-tube method. The effect of processing and heat treatment on the properties of the tapes and coils was studied. It is found that the shearing stress produced by the rolling process may destroy the 2223 phase, and the destroyed 2223 phase cannot be recovered by heat treatment, whereas the pressing stress produced by the uniaxial pressing process only makes the 2223 phase grains break, and the broken 2223 phase can be closed by the heat treatment. TheJ _c values of the rolling samples, pressing sample, and the coil with a diameter of 35 mm are over 1.3×10⁴, 2.5×10⁴, and 4×10³ A/cm² (77 K, 0 T), respectively.     

造纸机集散控制系统

本文介绍了造纸机集散控制系统．讨论了其硬件的组成和软件结构．研究了ＤＤＳ过程级控制器的功能及对造纸机各分部速度的优化控制．系统投人运行后，取得较好的经济效益．     

一种制备插层和无定形高岭土的新方法

利用甲醇钠强烈的夺氢作用 ,介绍了一种制备插层和无定形高岭土的方法。利用XRD为主要检测手段研究了甲醇钠的质量分数、反应温度等因素对反应的影响。结果表明 :在反应温度较低、质量分数较低的甲醇钠溶液中 ,高岭土容易被插层而膨胀 ,反之高岭土的层状结构被破坏而无定形化。红外光谱分析进一步证明了插层和无定形高岭土结构的变化     

IC的卫士,静电的克星 近观安森美半导体ESD解决方案

<正>当今时代,无处不在的静电与人们日常生活所依赖的各种电子设备已成为一对难以解决的矛盾,尤其是当手持电子设备体积缩小而产品特性及功能不断增加时,它们的输入/输出端口也随之增多,导致静     

单片机在监控同步电动机运行功率因数中的应用

介绍如何利用单片机自动控制同步电动机运行时的功率因数。     

电脱盐工艺技术改造运行总结

中国石化股份有限公司济南分公司南常减压装置 2 0 0 1年防腐改造中首次采用了国产高速电脱盐设备 ,对电脱盐工艺进行了改造 ,通过近 1年的生产运行 ,不断进行摸索调整 ,适应了加工多品种原油的需要 ,取得了较好的脱盐效果 ,脱后原油含盐降到 0 .62mg/L ,脱盐污水油含量降至 5 0 μg/g ,为后续加工装置降低能耗、减轻设备腐蚀、安全平稳生产创造了条件     

塑料布"V"形铺设法在水库引冰爬坡中的应用

通过塑料布“Ｖ”形铺设法在胜利水库引冰爬坡的应用与实践，证明了此法与传统贴坡式塑料布铺设法相 比，大大削减了冰推力对坝坡的破坏，减少了坝坡的修复费用，起到了良好的效果。