三溴偶氮胂—锇—溴酸钾催化光度法测定微量锇

在酸性介质中Ｏｓ（Ⅳ）对ＫＢｒＯ３氧化三溴偶氮胂的褪色反应有明显的催化作用,借此反应可在水相中直接测定微量锇。方法灵敏度高,锇的质量浓度为１０～２００μｇ／Ｌ时符合比尔定律,表观摩尔吸光系数为９１８×１０５Ｌ·ｍｏｌ－１·ｃｍ－１。方法已用于贵金属精矿中锇的测定     

工作面顶板动态离层水治理研究

2005年5月21日淮北矿业集团海孜煤矿745工作面发生了瞬时水量达3887m^3/h的特大溃水事故.经分析发现,此次溃水事故的水源来自7煤层顶板砂岩离层积水,是在复杂水文工程地质条件下,采煤工作面顶板产生的一种动态突水水源.针对离层突水的动力特点,在工作面回采影响以外的下山方向布置钻孔,并采取在工作面采前、采中和采后持续放水的措施,有效地阻止了离层水源的产生,保证了工作面安全生产.     

地理信息系统(GIS)在新发H7N9禽流感防控中的应用

通过对H7N9禽流感防控研究的归纳,总结了目前GIS技术在新发H7N9禽流感疫情的时空分布、流行规律、影响因素和风险评估等方面的应用研究,揭示了GIS技术在疫情防控中发挥的重要作用,为其他传染病特别是新发传染病的防控研究提供了借鉴。     

Late middle pleistocene interglacial deposits at upper strensham,worcestershire, england

Pleistocene deposits containing the disarticulated skeleton of a mammoth, and associated faunal and floral remains, were discovered in July 1990 at Upper Strensham, Worcestershire. The environmental evidence from the fauna and flora together with limited geological evidence, indicates that the deposits accumulated within a low energy fluvial environment with a surrounding marsh and restricted tree cover on, or close to, the floodplain. The patchy occurrence of trees in a species-rich grassland is discussed, and the climatic significance of the fauna and flora is considered. The Strensham site lies within the valley of the River Avon, which is known to contain at least five altitudinally distinct river terraces. The deposits at Strensham lie beneath a terraced surface that cannot be accommodated within the existing framework of terrace development in the valley, and evidence is presented which may suggest that these deposits form a previously unrecognised fluvial unit, the Strensham Member of the Avon Valley Formation. Amino-acid age estimates from shells taken from the fossiliferous sediments of the Strensham Member suggest a correlation with Oxygen Isotope Stage 7. This correlation suggests that the temperate deposits at this site should be correlated with the temperate phase recorded at Marsworth, Buckinghamshire and Stoke Goldington in the valley of the Great Ouse.     

2010年青海玉树7.1级地震发生的构造背景及其动力学分析

为了解2010年4月14日青海玉树7.1级地震活动背景和构造背景,探讨其发震的动力学过程,综合历史和现代地震资料,通过对玉树地震发震前的青藏高原东部地震活动特征分析,探讨了地震活动的大尺度时-空图像与玉树地震孕育发生的关系,研究其发震构造、震源机制解、余震分布和余震序列特征,从而综合探讨玉树地震发生的动力学背景和过程.结果表明,玉树地震的发生不是一个偶然事件,而是地震活动和构造运动的必然结果,是地震孕育和地球动力学过程的必然表现.     

鄂尔多斯盆地上三叠统延长组长7富有机质页岩中藻类化石的发现及地质意义

鄂尔多斯盆地上三叠统延长组长7段富有机质页岩是该盆地中生界含油系统的主力烃源岩,其有机质丰度高,类型好,具有巨大的生烃潜力。该套烃源岩中有机质的富集很大程度上取决于长7期的高古生产力及其提供的充足的有机质。长7期藻类勃发的存在已被多数学者所接受,但是目前还缺乏直观、有力的证据。笔者等通过薄片和扫描电镜观察、能谱分析,在长7段的脉状黄铁矿附近和碳酸盐结核中发现了属种单一、分布丰度高的藻类化石,它们呈现出近似球状的轮廓,在中部分布着一条裂缝。这些藻类化石的发现具有重要的地质意义,它为长7期的藻类勃发提供了很好的证据,也为该时期热液活动的重要作用提供了有力的支撑。     

鄂尔多斯盆地南部长7暗色泥岩与黑色页岩生烃动力学特征对比分析

以往对鄂尔多斯盆地南部地区长7油层组(简称长7)中烃源岩生烃潜力的研究主要是采用静态地球化学指标进行的,目前尚无对生烃动态特征的系统评价,因而制约了对长7烃源岩生烃潜力和页岩油资源分布有利岩性的客观认识。为此,选取长7不同类型的烃源岩样品,通过开放和封闭热模拟实验,对比分析了不同类型烃源岩的动力学参数、生烃产物、产率特征及生烃演化规律。结果表明:(1)黑色页岩活化能分布范围比暗色泥岩更为集中,且主频活化能和频率因子均低于暗色泥岩,体现了快速生烃的特性;(2)在外推到地质条件下,黑色页岩主要生烃期对应的R_o值(0.70%~0.87%)低于暗色泥岩(1.06%~1.72%),且以生油为主;(3)R_o在0.9%~1.3%范围内,黑色页岩的总烃产率高于暗色泥岩,生油量高于暗色泥岩。结合研究区两类烃源岩的地球化学资料综合分析表明,黑色页岩是研究区页岩油资源形成与分布的有利烃源岩。     

Characteristics and evolution of lacustrine turbidite of Chang-7Member of Yanchang Formation in northern Shaanxi

Lacustrine turbidite of Chang-7 Member in the studied area consists of siltstone and fine sandstone with respect to grain size, which is feldspathic lithic sandstone, syrosem arkose and arkose with respect to mineral constitution affected by provenance. There are such apparent signatures as lithology, sedimentary structure, sedimentary sequence and well logs, to recognize turbidite. During the paleogeographic evolution of Chang-7 Member, lake basin and deep lake are both at their maximum extent during Chang-73 stage, resulting in the deposition of Zhangjiatan shale with widespread extent and of turbidite with fragmental-like. Deep lake line is gradually moving toward lake center and turbidite sand bodies are gradually turning better with better lateral continuity, connectivity and more thickness, from stages of Chang-73, Chang-72 and Chang-71 , which can be favorable reservoir in deep-water.     

Using cosmogenic beryllium–7 as a tracer in sediment budget investigations

Recent advances in the use of the environmental radionuclides caesium–137 and unsupported lead–210 to quantify medium– and longer–term rates of erosion and sediment accumulation have proved of considerable value in catchment sediment budget investigations. However, there remains a need to explore the potential for using other shorter–lived radionuclides to provide evidence of sediment mobilisation, transport and storage over shorter timescales and particularly for individual events. This contribution reports the results of a study aimed at exploring the potential for using beryllium–7 (⁷Be, t _½= 53.3 days) to meet this requirement. The study investigated the use of ⁷Be as a sediment tracer in three key components of the sediment budget, namely, soil erosion and sediment mobilisation from slopes, the transport, storage and remobilisation of fine sediment in river channels and overbank deposition on river floodplains. The results presented clearly demonstrate the potential for using ⁷Be to obtain information on short–term and event–based sediment redistribution rates for use in catchment sediment budget investigations.     

基于7色高保真彩色印刷的颜色分色模型

CMYK 4色分色技术已经延用了很长时间,但是,随着印刷技术的提高以及人们对精品印刷物需求的日益迫切,在20世纪未开始了超过4色的多色高保真印刷技术研究,该研究的关键技术是如何将原稿颜色分解成所使用的分色版的印刷墨量值(网点面积率)。本文提出了一种新的三色表色原理及基于该原理对给定颜色进行色域空间位置划分的思想,给出了一种基于传统纽介堡方程算法原理的7色印刷颜色分色模型,在求解纽介堡方程的基础上,给合灰成分替代以及RGB色替代,实现了完善的分色。