CO为探针分子的原位FT—IR技术研究Pd／HM表面金属的分散态

以ＣＯ探针分子的ＩＲ研究表明,在Ｐｄ／ＨＭ上,钯还原前后具有不同对ＣＯ的线式吸附态。还原前分别在２１５６ｃｍ＾－１和２０４５ｃｍ＾－１处有两个ＩＲ吸收峰;而还原后在２０００ｃｍ＾－１附近出现几个重叠在一起的ＩＲ吸收峰,２１５６ｃｍ＾－１处小峰几乎消失,这是因为Ｐｄ＾２＋ＰＵＨＣＧＩＰ ＤＲ ＸＨ ＦＨＮ Ｒ     

分形理论在粗糙面电磁散射上的应用

介绍了分形的基本概念后,说明了用数盒子法提取分维数的方法,最后利用分形讨论了粗糙面的电磁散射问题。     

古植物组合与煤岩类型关系的研究

本文研究了成煤物质－植物与成煤结果－煤（煤岩类型）两者之间的关系，认为煤岩类型与植物组合有关．     

（NH_4）_2SO_4－ZrO_2体系的热分散性质

用红外光谱和Ｘ射线光电子能谱对研磨法制得的（ＮＨ＿４）＿２ＳＯ＿４－ＺｒＯ＿２样品进行了表征，并将表征结果与其催化性能关联。结果表明，热处理时存在着（ＮＨ＿４）＿２ＳＯ＿４在ＺｒＯ＿２表面的自发分散过程，同时形成Ｓ─Ｚｒ配合物，且随着处理温度的升高，配合物含量逐步增大，５７３Ｋ时达极大值，催化反应活性最大；超过５７３Ｋ时，表面Ｓ─Ｚｒ配合物逐渐分解，催化反应活性也相应地降低．     

搅拌釜内液滴直径的新关联式

基于搅拌釜内非各向同性湍流的现象,本文提出了可用于预测粘性分散相液-液系的液滴平均直径的新半理论性关联式: d_(32)/L=A(L/T)~nWe~(-1)(1+BVi) 其中,A、B、n均为经验常数。     

萘系磺酸甲醛缩合物的性质

本文讨论了分散剂的性质及其作用机理。分离了用作分散剂的萘磺酸甲醛缩合 物（ＮＡＮＳＦ），甲基萘磺酸甲醛缩合物（ＮＡＭＮＳＦ）的单一组分，测定了各组分水 溶液的表面张力，其降低表面张力的能力随分子量的增加而递减；ＮＡＮＳＦ和ＡＢＳ或 ＯＰ配，可使表面张力从６９ｍＮ／ｍ左右下降到４０ｍＮ／ｍ左右；也显著改善了对染料 的润湿能力，可使接触角从５８°下降到１２°左右；测定了ＮＡＮＳＦ各组分在活性炭和 ＴｉＯ２上的吸附，均属朗格缪吸附，推测ＮＡＮＳＦ分子在ＴｉＯ２上的吸附形态为平躺的 单分子吸附层；在活性炭上的吸附量随ＮＡＮＳＦ组分的分子量增加而递减，在ＴｉＯ２上则 随分子量的增加而递增。     

互联系统分散补偿鲁棒稳定的充要条件

本文讨论了由线性多变量子系统组成的互联系统的分散补偿控制;研究了H稳定的系统S_O中第k个子系统受到干扰从G_k=D_k~(-1)N_(lk)变为(?)_k=(D_k+ΔD_k)~(-1)(N_(lk)+ΔN_(lk))、S_O变为S(ΔN_(lk),ΔD_k)后系统H稳定的充要条件。文中还分析了两个或多个子系统同时受干扰时的情况。     

供应链管理在建筑业中的适用性探讨

目前，我国建筑业普遍存在着“大而不强，小而不专”及重复建设等弊病，本文将供应链管理思想引入建筑行业，分析了在建筑业实施供应链管理的必要性与可行性，为建筑业的变革提出一个新的思路。     

EP-based Optimization of Strategic Safety Stocks in Reverse Logistics Systems

A new heuristic strategic safety stock optimization is proposed based on evolutionary programming(EP) algorithm for reverse logistics supply chain systems. The supply chain is described with a network and the modeling complexity of external as well as internal product returns and reuses of supply chains is considered with. It is assumed that customer demands for final products are uncertain. Products are randomly returned from external customers to stock points. The optimization model is established and three different cases with different structures are used to show the strength of the algorithm.     

Selection of Dispersivity in Groundwater Risk Assessment

The Domenico model is used in combination with ASTM E 1739 in a Tier 2 risk assessment of chlorinated organic solvents contaminated groundwater sites to predict potential contaminant concentration in groundwater down-gradient from the point of exposure (POE). A knowledge of the dispersivity parameters is necessary for carrying out this calculation. A constant longitudinal dispersivity of 10 m is often used in analytical and numerical calculation. However, because of the scale effect of dispersion, two other main approaches are currently often used. From the viewpoint of conservative principle in risk assessment, it is necessary to determine which dispersivity data will give a higher predicted concentration, corresponding to a more conservative risk calculation. Generally, it is considered that a smaller dispersivity leads to a higher predicted concentration. This assumption is correct when dispersion is the only natural attenuation factor.However, degradation of commonly encountered chlorinated organic solvents in environment under natural condition has been widely reported. Calculations given in this paper of several representative cases show that a general consideration of the influence of dispersivity on concentration prediction is not always correct when a degradation term is included in the calculation. To give a conservative risk calculation, the scale effect of dispersion is considered. Calculations also show that the dispersivity parameters need to be determined by considering the POE distance from the source, the groundwater velocity, and the degradation rate of the contaminant.