关于新疆煤炭工业可持续发展的思考

阐述了新疆煤炭工业发展中存在的主要问题,分析了新疆煤田地质工作的发展方向及当前工作重点,并对新疆煤炭工业的可持续发展战略提出了政策性建议。     

地表剥蚀作用对地应力场反演的影响

岩体自重和剥蚀作用都是形成岩体初始应力场的重要因素。在地应力回归分析中，反演所得岩体重度往往大于实测重度。通过算例说明，地表剥蚀作用因素是导致该结果的主要原因，并分析了由此产生的一些工程应用问题。     

Evolution and inheritance of a rock coast: western Galicia,northwestern Spain

There is increasing evidence that shore platforms and other elements of rock coasts may be inherited, at least in part, from interglacial stages when sea level was similar to today's. Most of this evidence, which includes ancient beaches and datable terrestrial deposits, has been obtained from areas of resistant, slowly eroding rock, where the platforms often appear to be much too wide to have developed since the sea reached its present level. It is much more dif?cult to demonstrate that inheritance has occurred in areas of weaker rock, which generally lack any datable material. The coast of western Galicia in northwestern Spain has shore platforms in igneous and metamorphic rocks that were deeply weathered during the Tertiary. These platforms are closely associated with ancient beaches from the last interglacial stage, and associated periglacial and ?uvio‐nival deposits that covered and fossilized most of the Eemian platforms and cliffs during the late middle and late Weichselian glacial stage. The sedimentary processes and the thickness and facies of the sediments were determined by the height, aspect and gradient of the coastal mountains, and their distance from the coast. Radiocarbon dating, sedimentary analysis and platform morphology indicate that the shore platforms of Galicia have been inherited from at least the last interglacial stage. They were fossilized in places beneath thick Weichselian deposits and then exhumed during the Holocene transgression. The abundant evidence for inheritance in Galicia has important implications for other coasts in fairly weak rocks where such evidence is generally lacking. Copyright © 2003 John Wiley & Sons, Ltd.     

计算机网络的分布式计算环境及分布式处理

本文对网络计算模式、分布式计算环境以及分布式处理机能作了分析和探讨。     

火焰原子吸收法间接测定磷矿中氯

火焰原子吸收法间接测定磷矿中氯达刘生１云南个旧市化肥厂中心化验室个旧６６１４１１目前磷矿中Ｃｌ－含量的测定多采用浊度法、氯离子选择电极法及离子色谱法。本文采用火焰原子吸收法来间接测定磷矿中Ｃｌ－，即在试样溶液中加入定量的Ａｇ＋，试样中Ｃｌ－与Ａｇ＋生...     

On the Incorporation of the Effect of Crustal Structure into Empirical Strong Ground Motion Estimation

This article has two purposes. Firstly, a validation exercise of the modal summation technique for the computation of synthetic strong-motion records is performed for two regions of Europe (Umbria-Marche and south Iceland), using a variety of region specific crustal structure models, by comparing the predicted ground motion amplitudes with observed motions. It is found that the rate of decay of ground motions is well predicted by the theoretical decay curves but that the absolute size of the ground motions is underpredicted by the synthetic time-histories. This is thought to be due to the presence of low-velocity surface layers that amplify the ground motions but are not included in the crustal structure models used to compute the synthetic time-histories. Secondly, a new distance metric based on the computed theoretical decay curves is introduced which should have the ability to model the complex decay of strong ground motions. The ability of this new distance metric to reduce the associated scatter in empirically derived equations for the estimation of strong ground motions is tested. It is found that it does not lead to a reduction in the scatter but this is thought to be due to the use of crustal structure models that are not accurate or detailed enough for the regions studied. This revised version was published online in July 2006 with corrections to the Cover Date.     

阿勒泰冬季西部区域性偏东大风的成因分析

通过对阿勒泰地区1991～2000年西部区域性偏东大风天气的气候特征、环流形势及地形进行分析，归结出产生西部区域性偏东大风天气的成因及预报指标。     

人工神经网络在岩体初始应力场反演中的应用

岩土工程问题的有限元分析一般需要考虑初始地应力场，而可供工程应用的初始应力值，主要靠少数实测资料。根据少数测点值，采用人工神经网络与有限元相结合的方法求解岩体初始应力场。通过算例说明：文中所提方法是合理的。     

基坑防渗体局部失效渗流场变化特征

采用三维有限元方法分析了基坑开挖工程在防渗体出现局部失效情况下，引起渗流在失效部位的集中及渗流场空间状况。提出了以一维通道嵌入三维块体的方法模拟管涌发展过程及渗流场变化特征。讨论了管涌通道渗透性对基坑管涌发展规律的影响。