西安市临潼区骊山街道办地质环境承载力动态评价

地质环境承载力是衡量人类活动与地质环境是否协调的标准之一。开展地质环境承载力评价,调节人类活动强度,是实现区域经济可持续发展的关键。基于地理信息系统技术,量化综合评价模型,分析评价西安市临潼区骊山镇1980年、1990年、2000年、2010年和2015年地质环境承载力,并利用相等间隔法将承载力等级划分为好、较好、中、较差、差五个等级,进而获得各评价时间地质环境承载力分区图。经对比分析,在评价时间内研究区中北部冲洪积平原承载力指数平均下降率为5.63%;南部基岩山区承载力指数平均下降率为5.19%。研究成果可为研究区发展规划提供参考依据,以达到充分利用土地资源、调控地质环境变化趋势、减小危害的目的。     

南疆三地州双语师资现状调查研究

南疆是新疆推行双语教育最关键的地区,也是制约新疆双语教育发展的"短板"。少数民族双语师资短缺、双语教师质量不高一直是制约双语教育的"瓶颈",再加上新疆各地区双语教育的教学起点不尽相同,教学模式差异较大,造成了南疆少数民族小学整体教育教学水平的不高,进而无法完成提高少数民族整体素质的艰巨任务。     

早期美国来华传教士笔下的“中国形象”

美国对华传教工作始于1829年。美国来华传教士雅裨理和卫三畏分别于1830年与1833年来华。鸦片战争之前,由于清政府严格限制对外交往,来华传教士的活动范围受到限制,因此他们对中国的理解是比较肤浅的。在他们眼中,中国是个奇风异俗盛行的异教国度,是个等待西方“先进”文明与宗教拯救的民族。他们用文字记录了来华美国人对中国的最初印象,这些印象也成为此后美国人中国观的最初依据。     

GIS-based highway geological hazard information management and decision support system

Based on the practical application of Geology Information System(GIS) throughout the world, combined with the characters of road’s geological hazard and it’s supervision, the paper introduces on the importance of the research on road’s geological hazards information management and decision-making support system. The paper also analyzes the system’s target, the principles and key techniques in developing the system. In the research, we developed the GIS-based road’s geological hazard information management and decision-making support system and applied it to one speedway in the west of China where contains typical geological hazards. The system based on the database of road’s geological hazard on the grounds of spatial graphic information and attribute information. By virtue of the scientific assessment and prediction mathematical model, integrating the GIS’s strongpoint on spatial analyzing, the system is capable of visualizing the regionalization of road according to the geological hazards it contains, and accurately assessing and predicting geological hazards, thus efficiently assists the road construction and management units in the decision making on controlling the geological hazards and reducing the related loss. Biography: WANG Weidong (1971–), male, Associate professor, Ph.D. candidate, research direction: road and railway engineering, management science and engineering.     

关于提高《建筑工程测量》实践教学质量的探索

实践教学是建筑工程测量课程的一个重要组成部分,并且对提高该课程的教学效果乃至教学目标的实现具有重要的意义。根据该课程的实践教学存在的实际问题,教师应从实训项目设置、教学方法、考核方法、职业素质的培养等方面,对实践教学质量的提高进行探索。     

寻找失落的城市名片——泰安城区清末民国时期建筑物探访考证

泰安市是历史文化名城,有着悠久的历史和灿烂的文化,各种名胜古迹,灿若星辰。但是随着城市现代化和工业化的进程,一些尚未列入省级重点文物保护单位的清末民国古建筑,没有得到很好的保护．不少遭到严重破坏。本文对泰城清末民国的著名建筑一一探访,并进行初步考证,以引起人们对古建筑保护的热情。     

高斯—克吕格投影坐标换算在地质图叠合中的应用

本文主要从高斯—克吕格投影的基本原理入手,着重分析该投影系统两种相互联系的坐标系——地理坐标系和直角坐标系之间的换算关系,以坐标系的正算、反解,高斯—克吕格投影与UTM投影的变换为基础,解决不同坐标系地质图叠合问题。     

The preparation and application of microbubble contrast agent combining ultrasound imaging and magnetic resonance imaging

Encapsulated gas microbubbles are well known as ultrasound contrast agents （UCAs） for medical ultrasound （US） imaging. With the development of shell materials and preparation technologies, the application of microbubbles has been enormously popular in molecular imaging, drug delivery and targeted therapy, etc. The objective of this study is to develop Fe3O4 nanoparticle-inclusion microbubble construct. The in vitro US imaging experiment indicates that the Fe3O4 nanoparticle-inclusion microbubbles have higher US enhancement than those without Fe3O4 nanoparticle-inclusion. According to the microbubble dynamic theory, the acoustic scattering properties can be quantified by scattering cross-section of the shell. The scattering study on Fe3O4 nanoparticle-inclusion microbubbles of different concentration shows that within a certain range of concentration, the scattering cross-section of microbubble increases with the addition of Fe3O4 nanoparticles. When exceeding the concentration range, the ultrasonic characteristic of microbubbles is damped. On the other hand, since Fe3O4 nanoparticles can also serve as the Magnetic Resonance Imaging （MRI） contrast agent, they can be potentially used as contrast agents for the double-modality （MRI and US） clinical studies. However, it is important to control the concentration of Fe3O4 nanoparticles in the shell in order to realize the combined functions of US and MRI.     

某市医疗机构法定报告传染病报告质量调查分析

目的：了解某市法定报告传染病工作总体质量,为进一步改善工作质量提供依据。方法：按照《全国医疗机构传染病漏报调查方案》要求,于2008年采用多级抽样方法抽取某市市级医疗机构1所,宁陕县、石泉县、汉阴县的县、乡、村及个体诊所4级医疗机构各1所,共13所医疗机构。核查2008年1-9月的法定传染病报告资料。结果：2008年共报告269例,漏报27例,漏报率为9．12％,与2007年比较明显下降。结论：2008年传染病漏报情况有所改善,还需提高各基层医疗单位诊断报告传染病病例的积极性、准确性,减少漏报误报。     

系统仿真的发展沿革与展望

本文对系统仿真技术的发展作了扼要的历史回顾，着重介绍了仿真技术近期发展的基础、社会需求和今后发展趋势