鄂尔多斯盆地镇北地区延长组长7沉积期物源分析

收集前人研究成果,结合薄片鉴定、重矿物分析、稀土元素及地震等资料,对鄂尔多斯盆地延长组长7沉积期物源进行分析.结果表明：镇北地区延长组长7物源来自盆地西部和西南方向,其中西南物源为主要物源区,主要岩性为变质岩、中酸性岩浆岩;西部方向仅为沉积区提供白云岩等碳酸盐岩碎屑.     

Re-Discovering a Roman Wall Painting at Harvard: New Research on a Fragment from the Villa at Boscotrecase

ABSTRACT

This article presents historical and scientific analysis, as well as the conservation treatment of a newly rediscovered Roman wall painting fragment, now in the collection of the Harvard Art Museums. Although the piece has not previously been published, it was among a group of fragments removed from a Roman villa near Boscotrecase in southern Italy, an area that has been key to the study of Roman wall painting and other decoration. Technical imaging confirms the use of painting techniques consistent with other high-quality paintings in the area. Materials analysis revealed a palette consistent with published findings of Roman wall paintings, including abundant use of Egyptian blue and green earth. Of interest was the use of Egyptian blue as an optical brightener in select white passages. Despite the high quality of the painting, no cinnabar was present, and all red passages were achieved using hematite. Multiple different white minerals were identified including calcite, aragonite, and gypsum. The widespread presence of gypsum is unusual and may point to alteration.     

古籍保护学科建设核心议题述评

文章识读并遴选重要文献,围绕古籍保护学科建设和理论体系构建进行内容梳理和阐释。首先从古籍保护学科名称、学科属性、现有理论体系、学科建设方式、准备工作等方面呈现古籍保护研究基本问题,再从课程设置、培养方式及方案、培养层次、职业资格制度方面展现人才培养研究现状。研究发现:古籍保护学科建设迫切性已被学界认同,但学科定位存在争议;现有知识体系有待细化充实、核心内容有待厘清;学科建设应以人才培养为突破,宜依托图书情报领域进行建设。     

Google Earth在《遥感原理与方法》教学中的应用

Google Earth作为一门新技术,在多种领域中得到广泛应用.介绍了在《遥感原理与方法》课程教学过程中,Google Earth在影像的直观性、遥感影像的大气校正、遥感影像的几何校正、遥感影像的像点位移以及遥感应用等方面的作用.教学结果表明,Google Earth能够激发学生的学习兴趣,提高教学效果.     

Single-phase earth fault current distribution between optical fiber composite overhead ground wire and ordinary ground wire in transmission system

It is important for the safety of transmission system to accurately calculate single-phase earth fault current distribution. Features of double sided elimination method were illustrated. Quantitative calculation of single-phase earth fault current distribution and case verification were accomplished by using the loop method. Influences of some factors, such as single-phase earth fault location and ground resistance of poles, on short-circuit current distribution were discussed. Results show that: 1) results of the loop method conform to those of double sided elimination method; 2) the fault location hardly influences macro-distribution of short-circuit current. However, current near fault location is evidently influenced; and 3) the short-circuit current distribution is not so sensitive to the ground resistance of poles.     

论李宗仁“焦土抗战”新哲理及其作用

通过李宗仁在“焦土抗战论”中对时局的特点、对日和抗日国策、总体战略战术原则的分析和论述,认为李宗仁具有朴素的唯物主义世界观和辩证法军事思想,其哲理性具有新世界观萌芽的性质。这些新哲理为世界反法西斯战争的中国战场提供先进思想武器,并发挥着积极的能动作用。     

冶炼厂烟气排放与土壤重金属污染

通过对某冶炼厂烟源对应的监测点土壤中铜、镉、铅1979年和1989—2004年监测数据的对比研究,证明了被测烟源1989年后对土壤中镉和铅无明显影响,对个别监测点1989—1997年铜的含量有明显的影响。1999年后,对铜的影响也基本消除。这说明1989年后,该厂加大了对烟源的治理力度,逐步消除了对监测区域土壤重金属的污染。经秩相关系数分析,排除烟源影响,部分被测点位土壤中铜和铅的上升趋势具有显著性意义。可以认为,还存在着新的污染因素。     

关于漏电火灾报警系统的探讨

《高层民用建筑设计防火规范》（GB50045—95）（2005年版）中“9．5漏电火灾报警系统”,其具体条款及相应务文说明对设计的指导性均不明确,具体操作有一定难度,就此作相应探讨。     

上海图书馆藏《天后圣像》的版本与价值

上海图书馆的馆藏善本《天后圣像》是一部新发现的妈祖典籍。该书图文并茂,排版精致,故事标题典雅,图案画工精美,富有文化意蕴。书中记载了妈祖身世及其生前灵异事迹,没有历朝敕封的记录以及与国家政治相关的灵验事迹,和同类的妈祖文献相比,更富民间性,具有独特的研究价值和历史价值。     

掺杂表面活性剂和Bi^3＋离子对ZnO：Eu^3＋纳米颗粒的发光性能的影响

利用两步共沉淀法,通过填加金属离子Bi^3＋和表面活性剂十六烷基三甲基溴化铵（CTAB）,聚乙二醇-400（PEG-400）,聚乙二醇-4000（PEG-4000）,十二烷基硫酸钠（SDS）制备出稀土发光材料ZnO：Eu^3＋.结果表明：加入表面活性剂和金属离子对发光材料ZnO：Eu^3＋的发光性能有较大的影响,其中以同时加入SDS和Bi^3＋离子能够有效地增强ZnO：Eu^3＋粉体的红光发射,对其发光性能影响最大.