液化石油气储罐火灾模拟试验——池火灾环境下

液化石油气储罐在火灾作用下，其内部的温度和压力会迅速上升，从而可能引起储罐爆炸，进而酿成危害性更大的二次灾害。为此，对液化石油气储罐在池火灾环境下的热响应情况进行了大量的模拟试验研究。研究发现，储罐在池火灾作用下存在着明显的热分层，热分层加速了储罐内部压力升高的速度；储罐内部温度分布和压力响应受到储罐类型、充装水平等因素的影响，压力随时间的变化关系可以用三次多项式加以拟合。     

Integrating integer programming and probabilistic deduction graphs for probabilistic reasoning

Optimal solutions of several variants of the probabilistic reasoning problem were found by a new technique that integrates integer programming and probabilistic deduction graphs (PDG). PDGs are extended from deduction graphs of the and-type via normal deduction graphs. The foregoing variants to be solved can involve multiple hypotheses and multiple evidences where the former is given and the latter is unknown and being found or vice versa. The relationship among these hypotheses and evidences with possible intermediaries is represented by a causal graph. The proposed method can handle a large causal graph of any type and find an optimal solution by invoking a linear integer programming package. In addition, formulating the reasoning problem to fit integer programming takes a polynomial time. H.-L. Li was visiting the Department of Computer Sciences, University of North Texas in 1988–1989. He is with the Institute of Information Management, National Chiao Tung University, Hsinchu, Taiwan, R.O.C.     

同步辐射光刻技术

同步辐射光刻有希望代替传统光刻技术,用于0.25μm以下图形的超精细加工。本文叙述了它的原理、相关技术的开发现状和工艺应用。     

Direct atomic scale analysis of the distribution of Cu valence states in Cu/γ-Al2O3 catalysts

In this paper, the microstructure of a 1 wt.% Cu/γ-Al₂O₃ catalyst that was reduced in a 4% hydrogen/argon atmosphere at temperatures of 523, 773 and 1073 K, is studied by Z-contrast imaging and electron energy-loss spectroscopy (EELS) in a scanning transmission electron microscope (STEM). Results show that the copper species are well dispersed when the catalyst is reduced below 523 K. At 773 K, separated Cu(I) and Cu(0) species are found existing as ring-like and bulk-like particles. This appears to indicate that the copper has not been reduced to its metallic form due to the interaction between the copper oxide and the support. Large spherical particles having core-shell structures with Cu(I) in the shells and Cu(0) in the cores are generated when the catalyst is reduced at 1073 K. The formation of partially oxidized copper species upon reduction at 1073 K is attributed to the metallic copper interaction with the alumina support. This study also demonstrates that high-spatial resolution Z-contrast imaging and EELS performed simultaneously can provide unique information on the morphology and chemistry of metal species in supported metal catalysts.     

Enthalpic relaxation in semi-crystalline PEEK

The effect of crystallisation on the glass transition temperature and enthalpic relaxation in poly(ether ether ketone) (PEEK) has been investigated. The increase in glass transition temperature and the activation enthalpy of ageing is explained in terms of the amorphous phase being constrained by the crystallites. The extent of enthalpic relaxation with time has been analysed in terms of the Cowie-Ferguson model and the β value was found to be dependent on both temperature and the crystalline morphology, changes in the co-operativity of the relaxations are used to explain this observation.     

用分步沉积法去除Nb(OH)5/Ta(OH)5中Ti,Sb等金属杂质的工艺研究

从理论和实践应用方面，研究了在不同活性金属离子存在的条件下控制pH值，应用分步沉积的方法去除Nb(OH)5/Ta(OH)5中某些金属杂质。在一定温度下，可在不影响Nb(OH)5/Ta(OH)5沉积的条件下，达到有效去除Ti，Sb，Sn，Al，Fe等杂质元素的目的。     

MLS结构的电容-电压特性

本文报导在 Si 衬底上拉制聚酰胺 LB 膜的电容-电压特性,结果表明:它具有与其它绝缘膜相似的特性,为聚酰胺 LB 膜应用于场效应器件奠定了基础。     

分布系统中多米诺效应的分析与消除

分布系统中发生故障后,错误信息在进程间的传播,以及由此引起的系统恢复过程中的多米诺效应是分布系统容错恢复技术所面临的最重要与最困难的问题.目前各种研究工作偏重于具体的系统动态恢复技术.本文的研究重点在于首次揭示多米诺效应本身固有的数量特征及其与分布系统技术参数间的联系,给出多米诺效应动态消除技术,引入系统额外开销的下限,并针对动态技术的缺点,探讨多米诺效应的静态消除技术,为解决困难开辟新途径.     

Au（Ⅲ）—PAR络合吸附波的研究

金与PAR(4-(2-吡啶偶氮)间苯二酚)的络合物在HAc-NaAc底液中于-0.43V处有一灵敏的络合吸附导数波,波高与金浓度在0.1～1.8μg/ml范围内呈线性关系,可用于分析测定。研究了该波的性质及电极过程,测定了该络合物的组成及表观稳定常数。