钢管混凝土柱临界长细比的比较分析

根据目前有代表性的三种钢管混凝土结构设计规范，计算分析了三种规范中关于短柱破坏与长柱破坏之间临界．长细比的大小，并做了进一步的比较分析，给出了一些对工程有意义的结论。     

Autoignition Parameters and Detonation Critical Diameter of Hexanitromannite

The dependence of the ignition delay of hexanitromannite on the initial temperature was determined experimentally. The detonation critical diameter of cast hexanitromannite and its solutions in nitroglycol and nitroglycerine were measured.     

矿井瓦斯传爆温熵图与防爆的负熵机理

为了探讨瓦斯防爆的综合指标，依据现代系统的理论的能量观点，建立了瓦斯传爆的比熵界限及温熵图，该图是瓦斯传爆的能流界限图，它比现用的瓦斯浓度三角形更加全面准确，借助耗散结构理论，分析了瓦斯防爆的负熵机理，并对惰性气体的抑爆浓度等实验数据作出了理论解释。     

Oxygen limitation in static respiration activity index test

The static respiration activity index test was designed to assess the biodegradability (or biostability) of compost samples by monitoring their oxygen consumption rate under cultivation conditions. However, as revealed in this study, the measured activity index correlated not only with the biochemical characteristics of the tested sample but also with the operational conditions, including sample quantity, sample moisture content and cultivation temperature. It was speculated that this observation could be attributed to the limited oxygen transport to the sample. Hence the oxygen transport and consumption in the tested sample were modelled using a one‐dimensional, pseudo‐steady state model to estimate the relative significance of mass transfer resistance to the bioreaction rate. A so‐called critical thickness of the sample, above which mass transfer resistance became significant, was identified and assessed under various experimental conditions. The possible oxygen limitation for the static respiration test to estimate the activity index of compost samples was critically assessed. Copyright © 2006 Society of Chemical Industry     

Influence of Irradiation-Induced Correlated and Random Disorder on Flux Pinning in Bulk YBCO Melt-Textured Samples

YBCO melt textured samples were studied after Au ion irradiation of two opposite surface layers of the samples and after proton irradiation. The scaling behavior of the pinning force was studied in order to get information about mechanisms responsible for pinning in the studied samples. Correlated disorder introduced bysurface ion irradiation is effective at high reduced temperatures and leads to the occurrence of a kink in the irreversibility line and to the shift of this line toward higher fields and temperatures. Enhancement of critical current density,increasing with temperature and field, was observed. Random disorder due to proton irradiation does not change the irreversibility line and only provides critical current enhancementdecreasing with temperature and field.     

中国铝电解工业加入WTO后面临的风险及其风险电价

对我国铝电解工业的现状、发展趋势，以及加入WTO后所面临的风险和挑战进行了分析提出了风险电价的概念。     

钢结构构件在高应力集中区脆性破坏倾向性

含高应力集中钢结构构件的厚度是影响其发生脆性破坏的一个重要因素，它的影响是和其应力集中区的复杂应力状态相联系的。本文介绍含缺口的受拉钢构件应力应变关系在不同厚度和缺口曲率半径情况下的变化及其对构件发生脆性破坏可能性的影响。     

New effects in highT c superconductors

We show that a proper interpretation of the critical field measurements can distinguish spin fluctuation mechanism from others in the context of the pairing hypothesis. We can predict the existence of a new mode in the mixed state of a superconductor.     

Investigation of pH sensitivity of poly(acrylic acid‐co‐acrylamide) hydrogel

It was found that the upper critical solution temperature (UCST) of poly(acrylic acid‐co‐acrylamide) hydrogel decreases with increase in pH. The UCST of samples equilibrated in a buffer at pH 2.5 was 33.7 °C, whereas it shifted to below 0 °C when swollen in buffers above pH 10. FT‐IR showed that COOH group of acrylic acid ionized gradually in alkaline media. The morphology change of the hydrogel swollen in different buffers was studied by environmental scanning electron microscopy (ESEM). ESEM images showed that the pore size of the sample increased with increase in pH, and in strongly basic media the three‐dimensional network was replaced by a ‘sausage‐like’ or ‘desert‐like’ structure. A study of the pH‐dependent release of cefazolin sodium was also carried out. Copyright © 2003 Society of Chemical Industry     

Multiple-site and widespread fatigue damage in aging aircraft

Transport is a vital cog in the world economy. However, the cost of new aircraft has meant that there are now aging fleets whose continued airworthiness requires special analysis and improved crack detection techniques. This paper highlights the need for research into the field of structures containing both multi-site and widespread fatigue damage, topics which have recently received worldwide attention. To adequately explain the work that has been completed in these fields, a brief introduction to some of the more common terminology will also be given.