用热失重法确定水合粘土水分含量及存在形式

文章以蒙脱土为例，采用热失重法定性定量确定了水合粘土中结合水类型、界限及其相对含量，并与等温吸附法结果进行了对比。结果表明，用该方法得到的水合蒙脱土中各种水分的相对含量及总含水量与等温吸附实验结果相一致。热失重（25~250 ℃）分析结果表明，水合蒙脱土中水分子主要存在自由水、松散吸附结合水、紧密吸附水（强吸附结合水）3种状态，分别对应于25~75 ℃、75~120 ℃、120~230 ℃区间里的失水。从热失重（25~250 ℃）规律来看，仍存在两个明显的转折点p/ps=0.9、0.98，它们为粘土-水体系的两个特征湿度，前者为粘土表面强结合水与松散结合水（渗透结合水）之间的界限，后者为松散结合水与自由水之间的界限，这验证了等温吸附法确定的两个特征湿度及对粘土表面结合水界限划分的正确性。     

New nanocomposite materials based on polymerization of [oligo(oxyethylene) methacrylates] in the presence of montmorillonite clay

Intercalation of poly[oligo(oxyethylene) methacrylates] onto sodium montmorillonite (MMT) clay has been investigated. A polymer–clay hybrid has been synthesized through intercalation of the monomer followed by its solution free‐radical polymerization. Eight polymer–clay hybrids were prepared using different weight ratios of clay, different oligo(oxyethylene) lengths and different proportions of crosslinker. Evidence of the development of nanostructures is obtained from scanning electron microscopy, and wide‐angle X‐ray diffraction studies support these results which show disappearance of the peak characteristic to d₀₀₁ spacing. In this hybrid MMT is dispersed homogeneously in the polymer matrix. © 2003 Society of Chemical Industry     

PTC预应力管桩在软土地基处理中的施工工艺

结合PTC预应力管桩在沪宁高速公路扩建工程中的应用，从路基底板的施工、PTC预应力管桩的施工方面对其施工工艺进行了介绍，总结了PTC预应力管桩在软土地基处理中的应用优点。     

一种高效的机房软件安装方法

在机房管理实践的基础上，提出了综合注册表管理、系统设置、网络克隆等技术的一种高效的机房软件安装方法，这种方法具有安装效率高，易于恢复等特点，是机房管理的有效方法。     

鹰嘴岩隧道软弱破碎岩体的开挖与施工

渫水皂市水利枢纽左岸上坝公路鹰嘴岩隧道围岩主要为Ⅱ、Ⅲ、Ⅳ、Ⅴ类围岩，地质条件复杂，成洞条件差。在隧道施工中，遵循“短进尺，弱爆破、少扰动、早支护”的原则，及时进行监控量测，采取有效的加固措施，取得了良好效果，确保了工程进度与安全。     

错金工艺及对其运用的探讨

为了继承和发扬错金工艺，从其定义出发，探讨了该工艺在中国古代及国外的发展与应用以及笔者对该工艺的实验研究。针对在错金工艺实践过程中出现的问题，在查阅了相关的资料后，对传统错金工艺的实现方法提出了质疑。     

连铸转炉钢包电力牵引车的研制

论述研制连铸转炉钢包牵引车的目的、意义、方案的选择及设计计算校核,对技术要点作出了明确阐述.     

Techniques and Apparatus for Measuring Rotational Core Losses of Soft Magnetic Materials

In many situations such as the cores of a rotating electrical machine and the T joints of a multiphase transformer, the local flux density varies with time in terms of both magnitude and direction, i.e. the flux density vector is rotating. Therefore, the magnetic properties of the core materials under the rotating flux density vector excitation should be properly measured, modeled and applied in the design and analysis of these electromagnetic devices. This paper presents an extensive review on the development of techniques and apparatus for measuring the rotational core losses of soft magnetic materials based on the experiences of various researchers in the last hundred years.     

阿曼Daleel油田分支井钻井液技术研究

对Daleel油田作业5区三分支水平井DL-59井井下复杂情况分析,室内测定了引起复杂情况的Nahr Umr泥页岩地层的矿物组分和粘土矿物含量,优选了适应在该泥页岩地层215.9 mm造斜井段的钻井液配方中的各种处理剂,最后研制出钻井液配方,通过DL-73井应用后,取得了良好的防塌效果.     

Quantification of the layer dispersion degree in polymer layered silicate nanocomposites by transmission electron microscopy

As the performance of polymer layered silicate nanocomposites strongly depends on their interior layer dispersion, quantification of the layer dispersion degree is needed. In this work, a new methodology was developed to determine the dispersion parameter D_0.1, based on the measurement of the free-path spacing distance between the single clay sheets from the transmission electron microscopy (TEM) images. Several examples of exfoliated, intercalated, and immiscible composites were studied. It was found that the exfoliated composites had D_0.1 over 8%, while that of intercalated composites were between 4 and 8%. In the case of intercalation, a high frequency peak appeared at a short spacing distance in the histogram, which was a characteristic of the intercalation, distinct from the exfoliation. The main utility of this TEM methodology is for the quantification of exfoliated or intercalated samples with small number of layers with stacks. The dispersion parameter D_0.1 below 4% was suggested to classify as immiscible. A unique advantage of the TEM measurement is that the dispersion degree of different fillers can be counted individually.