Google地图应用之广东省地区JOPENS地震速报系统   总被引：1，自引：0，他引：1  

刘军  陈贵美 《华南地震》2011,31(3):41-49

利用Google公司提供的电子地图服务,以B/S结构(即浏览器和服务器结构)作为系统设计架构,监听JOPENS实时系统发送的地震触发消息,访问JOPENS数据库,根据广东省地区的监测要求,制定检索、筛选策略,获取地震详细信息,显示在浏览器网页上.采用Google地图的JOPENS地震速报系统可以使地震信息发布的显示内容...  相似文献   

城市小区居民地震灾害认知与响应的初步研究——以宝鸡市宝钛小区为例     

文彦君 《中国地震》2011,27(2):173-181

城市小区居民地震灾害认知与响应的研究,可为制定防震减灾相关政策提供实证依据.通过问卷调查方式,采用比较分析法,对宝鸡市宝钛小区居民的地震灾害认知与响应状况进行研究.结果表明,居民地震灾害认知与响应的总体水平不够理想,其中在自救互救方面最差,在地震灾害知识方面较好;居民对地震灾害知识了解的准确性欠缺、深度不够,防震减灾技能掌握不足,但有迫切的学习需求;居民自救互救的主动性和组织性较差,互救意识淡薄,地震谣言辨别能力不强,易于传播谣言.因此,充分发挥小区基层机构的宣传、引导、组织和管理作用,提升小区居民对地震灾害的认知与响应水平,是增强城市小区防震减灾综合能力的有效途径之一.  相似文献   

阿尔金断裂西段首期GPS观测资料处理及初步结果     

库稳飞  何建坤  王卫民  卢双疆  夏文海  Philippe Vernant 《地球物理学进展》2011,26(2):511-518

本文介绍了中国科学院青藏高原研究所在阿尔金断裂西段进行GPS观测的剖面布设和首期观测情况.利用GAMIT/GLOBK软件对首期观测数据进行了处理,并将结果归算到区域参考框架下.GAMIT计算得到的"准观测值"均满足所须精度,其中单天解标准化均方差小于0.3,基线的平均相对精度为1.8×10-9.GLOBK在区域参考框架...  相似文献   

基于OpenSees的钢筋混凝土桥墩拟静力试验数值分析   总被引：3，自引：1，他引：2  

李贵乾  郑罡  高波 《世界地震工程》2011,27(1)

以4个呈弯曲破坏形态的圆形钢筋混凝土桥墩的拟静力试验结果为依据,基于OpenSees中的Beamwith Hinges Element单元,建立了相应的桥墩滞回分析纤维单元模型。由模拟结果与试验结果对比可知,所建立的纤维单元模型对桥墩的骨架曲线及滞回曲线都有良好的模拟效果,且能体现桥墩在反复加载过程中刚度、强度退化现象,表明了模型的有效性。  相似文献   

Atmospheric Concentrations and Phase Partitioning of Polycyclic Aromatic Hydrocarbons in Izmir,Turkey   总被引：1，自引：0，他引：1  

Eylem Demircioglu  Aysun Sofuoglu  Mustafa Odabasi 《洁净——土壤、空气、水》2011,39(4):319-327

Ambient air polycyclic aromatic hydrocarbon (PAH) samples were collected at a suburban (n = 63) and at an urban site (n = 14) in Izmir, Turkey. Average gas‐phase total PAH (∑₁₄PAH) concentrations were 23.5 ng m^?3 for suburban and 109.7 ng m^?3 for urban sites while average particle‐phase total PAH concentrations were 12.3 and 34.5 ng m^?3 for suburban and urban sites, respectively. Higher ambient PAH concentrations were measured in the gas‐phase and ∑₁₄PAH concentrations were dominated by lower molecular weight PAHs. Multiple linear regression analysis indicated that the meteorological parameters were effective on ambient PAH concentrations. Emission sources of particle‐phase PAHs were investigated using a diagnostic plot of fluorene (FLN)/(fluorine + pyrene; PY) versus indeno[1,2,3‐cd]PY/(indeno[1,2,3‐cd]PY + benzo[g,h,i]perylene) and several diagnostic ratios. These approaches have indicated that traffic emissions (petroleum combustion) were the dominant PAH sources at both sites for summer and winter seasons. Experimental gas–particle partition coefficients (K_P) were compared to the predictions of octanol–air (K_OA) and soot–air (K_SA) partition coefficient models. The correlations between experimental and modeled K_P values were significant (r² = 0.79 and 0.94 for suburban and urban sites, respectively, p < 0.01). Octanol‐based absorptive partitioning model predicted lower partition coefficients especially for relatively volatile PAHs. However, overall there was a relatively good agreement between the measured K_P and soot‐based model predictions.  相似文献   

Optimization and Characterization of Tl(I) Adsorption onto Modified Ulmus carpinifolia Tree Leaves     

Javad Zolgharnein  Neda Asanjarani  S. Norollah Mousavi 《洁净——土壤、空气、水》2011,39(3):250-258

Ulmus carpinifolia tree leaves were successfully used to remove Tl(I) from aqueous solution in a batch system. In order to improve the uptake capacity of sorbent, it was modified by various chemical agents such as NaOH, HNO₃, NH₃, NaCl, NaHCO₃, and CaCl₂. Among the modifiers, NaCl was the best. Equilibrium behavior of sorbent with Tl(I) was examined by the several isotherms. Considering modified U. carpinifolia equilibrium data fitted well to the Langmuir model with maximum capacity of 54.6 mg/g. The other isotherms such as: Freundlich and Dubinin‐Redushkevich (D‐R) models were also examined. The central composite design (CCD) was successfully employed for optimization of biosorption process. An empirical model was given through using response surface methodology. Also its validation was recognized by using relevant statistical tests such as ANOVA. The optimum conditions of biosorption: pH, m (amount of sorbent) and C (initial concentration) were found to be 7.9, 11.4 g/L, and 8.8 mg/L, respectively. On the other hand thermodynamic parameters: ΔG, ΔH, and ΔS were evaluated: the obtained results show that biosorption process was spontaneous and exothermic. Eventually, FT‐IR analysis confirmed that the main functional groups of sorbent have been involved through the biosorption process.  相似文献   

Photocatalytic Activity of Combustion Synthesized Nanocrystalline CeAlO3     

Parag A. Deshpande  S. T. Aruna  Giridhar Madras 《洁净——土壤、空气、水》2011,39(3):259-264

The photocatalytic activity of combustion synthesized nanocrystalline CeAlO₃ was determined for the degradation of four anionic and four cationic dyes. The perovskite oxide showed high‐photocatalytic activity and a complete degradation of all the dyes was possible within 2 h. The photocatalytic activity of the compound was comparable with the activity of the commercial Degussa P‐25 TiO₂ catalyst. The degradation of dyes was found to follow first order kinetics and the first order degradation rate constants were determined.  相似文献   

基于方差分量估计的GPS/GLONASS组合点定位   总被引：2，自引：0，他引：2  

段举举  沈云中 《测绘通报》2011,(4):4-6

介绍GPS/GLONASS组合定位模型,采用Helmert方差分量估计确定GPS与GLONASS两类观测值的精度,合理确定两类观测值的权。通过GPS/GLONASS的方差分量估计实测,GPS与GLONASS伪距观测值的精度分别为±4.560 7 m与±9.928 9 m,相应的权比约为5∶1,采用此权比进行定权,能够提高定位精度。  相似文献   

GPS/Doppler导航随机模型的移动窗口实时估计算法     

周泽波  沈云中  李博峰 《测绘学报》2011,40(2):220-225

引进时间遗忘因子和观测冗余度因子,有效地平衡移动窗口内不同时刻的观测数据及其冗余情况对单位权方差估值的贡献,改进单位权方差的移动开窗实时估计算法.采用载噪比模型确定观测权阵,等价权抗差估计方法处理粗差.实测车载GPS/Doppler数据的处理结果表明:采用本文算法显著提高GPS/Doppler的导航精度与可靠性.  相似文献   

基于BJ -1小卫星遥感数据的矿区土地覆盖变化检测   总被引：3，自引：1，他引：2  

陈宇  杜培军  唐伟成  柳思聪 《国土资源遥感》2011,(3):146-150

为了评价利用北京一号小卫星(BJ-I)遥感数据监测煤矿区土地利用/地表覆盖变化的效果,针对其数据特点,选择基于图像信息运算和图像信息变换的直接变化检洲法以及分类后比较法,对徐州东矿区2007～2008年土地利用/地表覆盖变化情况进行检测,以对比、评价各种方法在土地利用/地表覆盖变化检测中的应用效果和BJ -1数据的适用...  相似文献