大洪山地区钾镁煌斑岩岩石特征

大洪山区钾镁煌斑岩类分为两个亚类:即金云白榴橄榄透辉钾镁煌斑岩和橄榄钾镁煌斑岩,文章着重介绍前者。金云白榴橄榄透辉钾镁煌斑岩具斑状结构,块状构造。由含钛金云母、假白榴石、假象橄榄石、透辉石、透长石、碱镁闪石组成,以前四种矿物为主,它们既构成斑晶,也分布基质中。副矿物有铬铁矿、镁铝榴石、钙钛矿、钛铁矿、磷灰石、α—碳硅石、金红石,次生矿物有绿泥石、蛇纹石、滑石、方解石、含镁钠铁闪石、石英、蒙脱石、高岭石、褐铁矿等。该岩石MgO、K_2O、TiO_2三组份较高,K_2O/Na_2O>5为富钾富镁岩石。Ba、Sr、Nb、Zr丰度高。根据湖北的大地构造地质环境,提出了今后金刚石找矿工作的设想,建议在扬子地台北部边缘用重砂追索法根据铬铁矿、镁铝榴石、锆石等指示矿物寻找钾镁煌斑岩;在扬子地台中部,川中—鄂西古陆上的黄陵背斜—带,用重砂法将镁铝榴石、铬铁矿、铬透辉石、镁钛铁矿等指示矿物圈定异常寻找金伯利岩。     

Vapour/liquid fractionation of rare earths,Y, Na,K, NH4, Cl,HCO3, SO4 and borate in fluids from the Piancastagnaio geothermal field,Italy

Vapour/liquid fractionation of rare earth elements and yttrium (REY), Na⁺, K⁺, NH₄⁺, HCO₃⁻, SO₄²⁻, Cl⁻ and borate in geothermal fluids from the Piancastagnaio geothermal field (Mt. Amiata geothermal area, Tuscany, central Italy) were evaluated based on the chemistry of collected liquids and condensed vapours. Apparent vapour–liquid partitioning factors (^appD^V/L) of REY vary from 0.3 to 0.01. These factors are much higher than those of Na (<0.001) and K (∼0.001). Volatile components are ion pairings such as NH₄HCO₃^o, NH₄Cl^o, NaHCO₃^o, CaSO₄^o and REYO(HCO)₃^o ⇔ REY(OH)CO₃^o. In vapour, REY and NH₄⁺ are negatively correlated. High and low ^appD^V/L(REY) indicate variations of NH₄⁺ concentrations in liquids. The results of this study are relevant to the understanding of element migration and deposition under hydrothermal boiling conditions.     

Propagator approach for time evolving wave packets in the quantum kicked rotator

We outline a method for time evolving narrow wave packets in the quantum-mechanical kicked rotator, an archetype of quantum chaos. We employ the approximation that the boundary conditions may be neglected. The evolution between kicks may then be carried out using the one-dimensional free-particle propagator.     

河南熊耳山地区中生代花岗岩成因及构造环境与成矿关系

笔者通过对熊耳山地区中生代花岗岩的野外地质特征、岩石学、微量及稀土元素特征的研究，提出岩体成因为下部地壳物质部分熔融而成，并利用稀土元素的数学模型加以论证；岩体依构造环境划分应为造山期后型花岗岩类（ＰＯＧ）；在空间、时间、同位素组成及岩体内部矿化信息等几个方面都表明了花岗岩不仅为矿床提供了热能，而且也提供了部分成矿物质。     

防冻泥浆在鄂拉山多金属矿钻进中的试验应用

通过位于高寒地区的青海鄂拉山多金属矿的钻孔施工实践,进行泥浆的配制及维护、采用配置方法,摸索出使用防冻泥浆克服冰冻钻具的施工技术.     

Traffic modeling in a reconfigurable broadband nomadic computing environment

Reconfiguring a network to counter variations in traffic is expected to greatly enhance optimal usage of network resources. But an important input to this method is the traffic fluctuations themselves. We have developed two models for this purpose to describe the time-dependent variations in traffic at a base station in a nomadic computing, wireless environment. The first model is rather simple and does not take into account details of human behavior. It takes into account the probabilities of choosing different applications. The model is also analyzed and experimented with to identify the important input parameters. The second model, a refined version of the first model, takes into account details of relevant human behavior (in the context of a wireless nomadic computing environment). Finally, we have compared the two models on the basis of their complexity and validity in different situations.     

Internalisation of external cost in the power generation sector: Analysis with Global Multi-regional MARKAL model

The Global MARKAL-Model (GMM), a multi-regional “bottom-up” partial equilibrium model of the global energy system with endogenous technological learning, is used to address impacts of internalisation of external costs from power production. This modelling approach imposes additional charges on electricity generation, which reflect the costs of environmental and health damages from local pollutants (SO₂, NO_x) and climate change, wastes, occupational health, risk of accidents, noise and other burdens. Technologies allowing abatement of pollutants emitted from power plants are rapidly introduced into the energy system, for example, desulphurisation, NO_x removal, and CO₂ scrubbers. The modelling results indicate substantial changes in the electricity production system in favour of natural gas combined cycle, nuclear power and renewables induced by internalisation of external costs and also efficiency loss due to the use of scrubbers. Structural changes and fuel switching in the electricity sector result in significant reduction of emissions of both local pollution and CO₂ over the modelled time period. Strong decarbonisation impact of internalising local externalities suggests that ancillary benefits can be expected from policies directly addressing other issues then CO₂ mitigation. Finally, the detailed analysis of the total generation cost of different technologies points out that inclusion of external cost in the price of electricity increases competitiveness of non-fossil generation sources and fossil power plants with emission control.     

Emissions targeting and planning: An application of CO2 emissions pinch analysis (CEPA) to the Irish electricity generation sector

This paper outlines the past analysis and projected planning of the Irish electricity generation sector using an extension of a novel methodology based on a graphical optimisation concept. The main two adaptations/extensions to the current form of the methodology are proposed as both the forecasting adaptation and the extension that accounts for the dynamic nature of electricity supply–demand. The determination of an optimal energy resource (OER) mix (or optimal fuel mix) for the sector will look to give guidelines towards fulfilling the sector's Kyoto targets, as well as yielding a possible approach for other sectors to follow in the future. Data pertaining to the sector for the year 2005 was taken in order to illustrate the analysis and forecasting procedures.