Short-term Climate Characteristics at Ny-(A)lesund over the Arctic Tundra Area

Based on the Germany Koldwey Station's 1994-2003 conventional observation hourly data, this paper conducts a statistical analysis on the short-term climate characteristics for an arctic tundra region (Ny-(A)lesund island) where our first arctic expedition station (Huanghe Station) was located. Affected by the North Atlantic warming current, this area has a humid temperate climate, and the air temperature at Ny-(A)lesund rose above 0 ℃ even during deep winter season during our research period. The wind speed in this area was low and appeared most at southeast direction. We find that the temperature at Ny-(A)lesund rose in the faster rate (0.68 ℃/10 a) than those at the whole Arctic area. Compared with the floating ices where our expedition conducted in the Arctic, Ny-(A)lesund was warmer and more humid and had lower wind speed. Comparison of the near surface air temperature derived by NCEP/NCAR reanalysis to the conventional measurements conducted at the Koldwey site in Ny-(A)lesund area shows a good agreement for winter season and a significant difference for summer season.     

基于MAPGIS的县级土地利用数据库建设及探讨——以大同市新荣区为例

本文体现了3S技术在县级土地更新调查中的重要性。重点介绍了在MAPGIS土地利用数据库系统中通过专题数据建立土地利用现状数据库,从内业判读,到外业调查,然后进行数据入库前的检查,分析数据的精度,入库后的相关处理和检查,最后建立新荣区1:1万土地利用数据库。通过建立的数据库,进行统计和汇总,输出各种专题图表,供土地部门进行合理规划和决策。     

基于GIS/MIS/OA的短周期工业原料林经营模式研究

提出了短周期工业原料林经营模式的概念,探讨了短周期工业原料林经营模式的体系结构、子系统功能和主要林业数表类型,说明其与GIS/MIS/OA系统集成的必然趋势,并以岳阳纸业股份公司的纸浆原料林为例进行了实例分析。     

甜水海微陆块上二叠系地层的厘定及其特征

笔者在《岔路口》等四幅1：25万区域地质调查工作中，在红山湖一带从前人所划的石炭系地层中解体出一套二叠系地层，并对其进行了详细的岩石地层、生物地层和层序地层研究，拟新命名为红山湖组，时代为中二叠世。该地层为甜水海微陆块上稳定型的碳酸盐岩建造，与陆块南北两侧二叠系特征截然不同。该套地层的发现填补了微陆块上二叠系地层的空白，对古特提斯多岛洋研究具有重要意义。     

The temporal and spatial characteristics of the surface air temperature variations over the Antarctic and its surrounding area

The characteristics of the spatial distribution, temporal variations trend and oscillation for the surface air temperature variations during 1957—1993 in the Antarctic and its surrounding area were analyzed. The results show that the short-time climate change in the Antarctic is complex both temporally and spatially. The Antarctic is by no means the strongest responding region to the global greenhouse effect. There is a distinguished difference in the trends of the temperature changes for the Antarctic and global mean, which could not be explained simply by the global greenhouse effect. Project supported by the National Antarctic Key Project of China (85-905).     

SMA-MR复合型阻尼器

利用形状记忆合金超弹性、形状记忆特性和MR液的材料特性，提出了SMA-MR复合阻尼器，建立了阻尼器的理论模型。通过输入正弦波得到小震、大震时相应的滞回曲线，并对一单层框架进行输入El Centro地震波下的减震效果分析，比较了SMA-MR阻尼器、仅有SMA和仅有MR作用下的减震效果。结果表明，所设计的SMA-MR阻尼器具有卓越的阻尼性能，对大震、小震的控制实现了自适应的智能性。     

由一组显著地震活动看地震应力场的"聚""散"过程

2002年8月21日至10月20日，华北地区发生了一组显著地震活动。通过该组显著地震活动的时空分布特点，分析了华北地区这一轮地震应力场的“聚”“散”过程，讨论了华北块体北缘地震带及与之紧邻的内蒙古西乌珠穆沁旗地震区未来的活动趋势，所得认识对今后该区的震情动态跟踪监视、趋势估计乃至地震短期预测判断具有一定的现实意义。     

Changes in the spatial scale of Beijing UHI and urban development

The seasonal and interannual variations of Beijing urban heat island (UHI) are investigated in this paper using the temperature data from 1960 to 2000 at 20 meteorological stations in the Beijing region, and then the relationship between the intensity and spatial scale of UHI and Beijing urbanization indices is analyzed and discussed. Main conclusions are the followings. First, Beijing UHI shows obvious seasonal variations, and it is strongest in winter, next in spring and autumn, and least in summer. The seasonal variation of the UHI mainly occurs in the urban area. The UHI intensity at the center of Beijing is more than 0.8℃ in winter, and only 0.5℃ in summer. Second, the intensity of Beijing HUI exhibits a clear interannual warming trend with its mean growth rate (MGR) being 0.3088℃/10 a. The MGR of HUI is largest in winter, next in spring and autumn, and least in summer, and the urban temperature increase makes a major contribution to the growth of HUI intensity. Third, since the Reform and Opening, the urbanization indices have grown several ten times or even one hundred times, the intensity of HUI has increased dramatically, and its spatial scale also expanded distinctively along with the expansion of urban architectural complexes. Fourth, the interannual variation of urbanization indices is very similar with that of HUI intensity, and their linear correlation coefficients are significant at a more than 0.001 confidence level.     

Summer weather characteristics on the Grove Mountain of East Antarctica

The summer weather characteristics of the Grove Mountain, East Antarctica, are presented based on the data obtained by Chinese National Antarctic Expedition (CHINARE) in January 1999. The result shows that the pattern of daily variation of temperature and the prevailing wind direction in Grove is similar to that of Zhongshan Station. However, the daily range of temperature and strong wind frequency are much higher than those of Zhongshan Station. The change of wind direction is close to the weather system that impacted the Grove Mountain. The warm and wet air from northern parts often causes the precipitation. The clear weather appears when controlled by eastern winds in January.     

基于街景图像的厦门本岛环境特征对住宅价格的影响研究

住宅价格的空间分异是城市空间资源配置不均衡的外在表现,理解住宅价格的主导影响因素及其空间分异特征对于住区规划及房价调控政策的制定具有重要意义。既有研究较少考虑环境品质对住宅价格的影响和影响因素的作用尺度差异,针对以上问题,本文引入街景图像,在特征价格模型的基础上拓展环境特征,构建多尺度地理加权回归（MGWR）模型,研究环境特征对住宅价格的影响效用,并通过分析其他控制变量的系数空间格局,总结各变量的空间分异特征规律。主要结论为：(1)街景图像测度的环境特征更符合人们对居住环境的真实感知,研究结论可为居住环境品质提升提供更加精细化的设计策略;MGWR模型对变量的空间分异现象具有更接近于真实值的拟合效果,可描述不同变量的作用尺度差异,这有助于为特定地区制定针对性规划策略。(2)厦门本岛住宅价格呈现显著的聚类特征,并沿城市核心发展轴呈“带状”结构分布。(3) 3个环境特征变量对于住宅价格均为显著的正向影响,且作用接近全局尺度,街景绿视率的影响最强,其次是天空开敞度和相对步行指数。(4)总结各变量的系数空间分异规律,发现不同特征地区住宅价格的主导影响因素不同,核心地区主要受交通、教育因素的影响;...