鄂东南铁山岩体内部大理岩捕虏体分布规律及找矿探讨

在系统收集整理、综合分析前人工作及资料的基础上,归纳总结了鄂东南铁山岩体内部大理岩捕虏体分布规律及成矿地质条件.笔者以地质异常理论为指导思想,通过分析与大理岩捕虏体相关的已知矿床(点)地质特征,围绕铁山岩体内部大理岩捕虏体,探讨了找矿方法及今后找矿方向.     

Stakeholders’ perceptions on forest biomass-based bioenergy development in the southern US

This study analyzes perceptions of four stakeholder groups (non-governmental organizations [NGOs], government, industry, and academia) regarding forest biomass-based bioenergy development in the southern US (United States) by combining SWOT (Strength, Weakness, Opportunities, and Threats) framework with AHP (Analytical Hierarchy Process). Results suggest that NGO representatives perceived rural development as an important opportunity. Government stakeholder group noted that less or no competition with food production and promotes energy security were major strength factors. Conversion technologies are still under trial was identified as a major weakness by industry representatives. Representatives of academia felt that the competition from other renewable energy sources could be a major threat. Overall, all stakeholder groups were in favor of forest biomass-based bioenergy development in the southern US.     

Provenance studies of obsidians from Neolithic contexts in Southern Italy by IBA (Ion Beam Analysis) methods

Obsidian samples recovered in archaeological contexts in Southern Italy were analysed by PIXE (Particle Induced X-ray Emission) and PIGE (Particle Induced Gamma Ray Emission) for the quantitative determination of both major and trace elements composition. The archaeological contexts were absolutely dated to the 5th millennium BC by mean of AMS (Accelerator Mass Spectrometry) radiocarbon dating analyses carried out on associated organic materials such as charcoal and human bones. The comparison of the compositional results obtained for the analysed samples with published data available for the known obsidian sources in the Mediterranean allowed to identify the sources of the raw material, giving an important contribution to the reconstruction of the ancient trade and exchange routes in Southern Italy prehistory.     

南黄海周缘地区的地质构造联系

本文在前人研究基础上对南黄海周缘地区的地质构造作了综合.这个由块体及结合带组成的区域,经历了漫长复杂发展史。块体拼贴格架主要奠定于震旦纪前,三叠纪中期又经历一次重大构造变动,至于南黄海东、西两面间地质构造联系,看来并不如想像的那样简单。北西向的南黄海—东海断裂岩浆岩带可能是一条重要的构造界线。     

湖北广济早三叠世遗迹化石及其古环境意义

本文首次报导了产于鄂东广济地区关山、盘塘、田镇等地下三叠统大冶组和嘉陵江组地层中的遗迹化石,计12属,14种。大冶组上段为灰岩、泥灰岩夹黑色页岩。以Thalassinoides sp.;Teichichnus sp.;Phycodes sp.为代表的遗迹化石组合显示为局限海盆环境。嘉陵江组中段为页片状白云质灰岩,以PTotopaleodictyon sp.;Paladophysus sp.;chondrites sp.为代表的组合为咸化浅海相。嘉陵江组上段为中层状白云岩夹蠕虫状灰岩,遗迹化石丰富。以Phycodes sp.;Palanolites sp.HelminthopsisSP.;Asteriacites sp.;Rhizocorallium sp.;Chondrues sp.为代表,为潮坪环境。遗迹化石的发现,对下三叠统地层划分有重要参考价值。     

Analyzing structural and functional changes of traditional landscapes—two examples from Southern France

Traditional landscapes are changing with increasing speed and an important cultural heritage is becoming lost. New landscapes replace the traditional ones gradually or sometimes abruptly. This article analyzes the characteristics and mechanisms of landscape changes at a settlement level, by using case studies in the countryside of southern France where landscapes are in transition between new residential urbanization and land abandonment. Structural changes in land use, building and field patterns between two time periods are studied using aerial photographs covering a period from 1960 to 1999. The photographs were scanned to allow on screen digitalization and interpretation of selected features and details, which were consecutively mapped and analyzed in a GIS. Changes observed on the aerial photographs were compared with the population statistic and the accessibility of the place. All cases show very different and unique trajectories of change with complex interactions between different driving forces. Agricultural intensification and land abandonment act simultaneously with different forms of urbanization in the countryside. Although easily recognizable on the aerial photographs, a quantitative assessment of the changes in the different structural components remains difficult and the results can hardly be related to changes in population characteristics and accessibility. Consequently, structural and morphological changes observed on the aerial photographs lead to other interpretations of the underlying functional processes than the statistical data do.     

柿庄南煤层气富集主控因素及开发潜力分析

基于煤层气富集主控因素及开发潜力,对柿庄南区块进行详细解剖。从沉积环境、水文地质条件、地质构造等3个方面对柿庄南区块煤层气富集的主控因素进行分析,此外,还通过研究柿庄南煤储层参数,分析了煤层气的开发潜力。结果表明,3号煤层顶底板以厚层泥岩为主,15号煤层顶板为大套灰岩沉积,封闭性较好,均有利于煤层气的保存;区内地下水由高势能的东南部向低势能的西北方向顺层流动,煤层气在水力运移作用下发生解吸、扩散,并形成一定程度的富集;封闭性较好的寺头断层可以作为煤层气富集的侧向边界,使得断层东部气体含量升高。3号和15号煤层厚度较大,煤级较高,埋深适中,含气量、含气饱和度较高,均有利于煤层气的开发;而煤储层渗透率较低,且受最小主应力影响较大,采取压裂措施时应当避开应力异常高值区。     

南方交直流混合电网调度运行控制

南方电网是我国第一个交直流混合运行的大电网,直流落点集中,西电东送通道长期压极限运行,电网稳定问题较突出。同时,南方电网地理气象条件复杂,雷害、污闪、台风、覆冰等问题严重威胁电网安全。因此南方电网必然是一个结构复杂、科技含量高、运行驾驭难度大的电网。文中系统地阐述了南方电网的技术特点,总结了中国南方电网公司为保证南方交直流混合电网的安全稳定运行在调度运行控制方面所做的工作及安全措施,如注重电网稳定特性分析、加强安全稳定控制系统的建设和管理、强化PSS运行管理、合理调控交直流功率分配等问题。     

南方电网继电保护一体化监控系统建设

建设继电保护一体化监控系统可以提高继电保护专业管理水平,满足新形势下电网的精细化管理需求。通过对现状及需求的对比分析,提出了以现有整定计算、保护及故障信息系统、在线校核系统、设备管理系统为基础,通过加强这四大核心模块之间,以及其与雷电定位系统等的信息交互,建设一个管理内涵更为丰富的一体化监控系统。根据系统的建设需求,提出了系统的设计架构,并分析了建模、数据接口、模型拼接、在线校核及辅助决策等关键技术。从综合建模、横向融合、纵向贯通、远方控制等方面介绍了目前南方电网局部试点的应用情况。     

SCS-500E装置在陕南电网安全稳定控制系统中的应用

结合陕南电网地理接线图,分析了陕南电网突出的安全稳定问题,建立了陕南电网安全稳定控制系统,介绍了基于SCS-500E分布式稳定控制装置的系统组成及各站功能,并阐述了系统特点。经成功投运后,该系统提高了陕南电网的安全稳定运行水平,对预防系统严重事故的发生起到了重要作用。