基于置信度的地址匹配方法初探     

魏金明  仲伟政 《测绘科学》2015,40(1):122-125

针对市域地址数据特点,文章在地址编码和地址匹配现有研究成果的基础上,参照济南市地址使用习惯,提出了一种基于置信度的地址匹配方法。该方法以地址数据库为基础,依托规范化地址编码,利用分词算法和置信度筛选的方法匹配数据,通过人机交互的方式扩充地址库,实现了地址的自动匹配定位,提高了匹配的正确性。  相似文献   

耕地质量与三农发展水平耦合研究——以四川省为例     

詹长根  涂李蕾  吴艺  严盼 《测绘与空间地理信息》2015,(12):13-17

耕地质量与三农发展水平密切相关,耕地质量与三农的耦合协调发展是和谐社会可持续发展的重要基础。本文采用系统分析的思路,以四川省为实例,在建立耕地质量及三农发展水平评价指标体系的基础上,运用耦合协调度模型、相对发展度模型等探讨耕地质量与三农发展水平的交互耦合关系并分析其空间分异特征。分析得出:四川省21个地级市的耕地质量与三农发展的协调耦合属于中偏上水平,大多数地区处于高度协调耦合阶段;空间格局上呈现西低东高、南北方向有微弱的倒U形趋势。两系统相对发展不均衡,各地市应因地制宜,采取措施优先发展相对滞后的系统,促进耕地质量与三农的协调发展。  相似文献   

秒级探空数据随机误差评估   总被引：3，自引：2，他引：1       下载免费PDF全文

姚雯  马颖 《应用气象学报》2015,26(5):600-609

利用2007年6月和2008年6—7月国内GPS探空仪同步比对试验数据及2010年中国阳江国际探空系统比对试验数据,基于现有的探空仪随机误差的间接计算方法,深入分析不同的探空原始数据平滑处理程度对随机误差评估的影响。分析表明:现有的探空仪随机误差评估方法不能完全适用于秒级探空数据,特别是对风、平流层温度和对流层相对湿度这3个要素的随机误差的评估。在同步比对施放中,如果对探空原始数据的平滑处理程度一致,可以利用现有的随机误差评估方法,不会产生明显偏差;反之,如果平滑处理程度差异较大,则间接计算得出的随机误差会明显偏大。在比对施放方案中,为了更好地获取某种型号探空仪的随机误差,建议将多个同型号探空仪同球施放进行比对观测,避免作为参考仪器的其他型号探空仪自身的误差参与计算,影响待测探空仪随机误差的评估。同型号探空仪同球施放的探空仪越多,获取的有效统计数据越多,随机误差的分析越准确。  相似文献   

江苏省公众气象服务满意度影响因素研究   总被引：1，自引：0，他引：1  

李长顺  赵飞  唐德才 《气象科学》2015,35(2):230-236

通过江苏省气象局设计的《江苏省公众气象服务需求调查表》对江苏省13个市及各县区进行整群抽样调查,获取较大数量的公众气象服务满意度样本和数据,选取性别、年龄、属性、行业、本地居住时间、收入6个影响因素。运用单因素方差分析、多因素方差分析和多元线性回归模型,对江苏省公众气象服务满意度进行分析。结果显示在单因素方差分析中,除性别外,其余5个影响因素的差异均为显著。在多因素方差分析中双因素、3因素和4因素交互均不显著。通过多元线性回归进一步分析得出居住时间是影响满意度的最主要因素,而性别是影响最小的因素。  相似文献   

An Investigation into the Ionic Chemical Composition and Mixing State of Biomass Burning Particles Recorded During TRACE-P P3B Flight#10     

C.?H.?SongEmail author  Y.?Ma  D.?Orsini  Y.?P.?Kim  R.?J.?Weber 《Journal of Atmospheric Chemistry》2005,51(1):43-64

In this study bulk airborne aerosol composition measured by the PILS-IC (integration time of 3 min 24 s) during TRACE-P P3B Flight 10 are used to investigate the ionic chemical composition and mixing state of biomass burning particles. A biomass burning plume, roughly 3–4 days old, moderately influenced by urban pollution aerosols recorded in the Philippine Sea is investigated. Focusing on the fine particle NO₃⁻, SO₄²⁻, K⁺, NH₄⁺, and water-soluble organics, the observed correlations and nearly 1-to-1 molar ratios between K⁺ and NO₃⁻ and between NH₄⁺ and (SO₄²⁻+ inferred Organics) suggest the presence of fine-mode KNO₃, (NH₄)₂SO₄, and NH₄(Organics) aerosols. Under the assumption that these ion pairs existed, and because KNO₃ is thermodynamically less favored than K₂SO₄ in a mixture of NO₃⁻, SO₄²⁻, K⁺, NH₄⁺, and Organic anions, the measurements suggest that aerosols could be composed of biomass burning particles (KNO₃) mixed to a large degree externally with the (NH₄)₂SO₄ aerosols. A “closed-mode” thermodynamic aerosol simulation predicts that a degree of external mixing (by SO₄²⁻ mass) of 60 to 100% is necessary to achieve the observed ionic associations in terms of the existence of KNO₃. However, the degree of external mixing is most likely larger than 90%, based on both the presence of KNO₃ and the amounts of NH₄NO₃. Calculations are also shown that the aerosol mixing state significantly impacts particle growth by water condensation/evaporation. In the case of P3B Flight #10, the internal mixture is generally more hygroscopic than the external mixture. This method for estimating particle mixing state from bulk aerosol data is less definitive than single particle analysis, but because the data are quantitative, it may provide a complementary method to single particle chemical analysis.  相似文献   

物元理论在危岩滑坡灾害社会经济易损性评价中的应用     

曾群华  郭跃  赵纯勇 《中国地质灾害与防治学报》2004,15(3):111-115,148

文章分析了物元概念的可拓性。以万州为例,应用物元理论分析说明危岩、滑坡灾害的社会经济易损性具有发散性、可扩性、相关性和共扼性特点。进行区域易损性评价的基本目标是获取各种易损性参数,为滑坡灾害破坏损失评价提供基本资料。根据万州50a来的灾害统计资料,选取了灾害密度、灾害频数、经济(GDP)损失模数、生命损失模数等易损性评价指标,对该区的脆弱性和易损强度进行了综合评估,计算出其易损度。根据这些数据．提出用物元可拓集理论构造各易损程度指标等级标准的物元矩阵和待识别对象与各指标的关联度,根据关联度大小判断综合易损度(CVD)与计算结果相符合。最后提出减灾工作应在传统理论研究的基础上,应用物元理论采用可拓学方法,提出区域易损性分析、评估的简单思路,以期为滑坡区域防灾、减灾规划提供新的理论和方法依据。  相似文献   

Grey degree and grey prediction of groundwater head   总被引：2，自引：0，他引：2  

Y.-L.?YehEmail author  T.-C.?Chen 《Stochastic Environmental Research and Risk Assessment (SERRA)》2004,18(5):351-363

Boundary types and geologic conditions, which possess random and obscure characteristics, produce variations in groundwater heads. In this study, a groundwater flow system was regarded as a grey system and a grey degree defined and quantified those characteristics. Data were obtained from field records in Gao-Shu and De-Xie Stations, which are located in the upper and middle sites of Pingtung Plain, Taiwan, respectively. An estimated interval was used to represent the upper and lower groundwater head limits. The analyses showed that the grey degree in the wet season was smaller than in the dry season. This was due to the greater uncertainty in groundwater pumping and rainfall recharge in the dry season. With high confidence levels, the grey degree of the groundwater heads decreased. Under spatial distribution, the uncertainty of the groundwater pumping and rainfall recharge in the middle zone was greater than in the upper zone because the middle zone included residential districts and agricultural regions. Thus, the grey degree in the upper zone was less than the middle zone. The grey model can be used to predict a groundwater head based on the observed groundwater head data and the random degree in the groundwater head each month can be judged by the grey interval.  相似文献   

成矿预测的模糊综合评判法     

姜效典 《中国海洋大学学报(自然科学版)》1992,(4)

用模糊聚类方法,得出每种矿产的聚类中心,由此定义一个新的从属度,对预测单元进行模糊综合评判。该方法基本解决了预测单元多,已知条件少的成矿预测问题。  相似文献   

深Ⅱ°烧伤创面应用CHIMEHERB人工皮与酒精冷藏猪皮的比较     

刘久春  祁锋 《中国海洋大学学报(自然科学版)》1989,(Z3)

通过CHIMEHERB人工皮与酒精冷藏猪皮在深Ⅱ°及混合度烧伤创面上的应用比较,表明两者的粘附,透水等性能以及止痛效果一致.且前者比后者的优点是:不占位、平均提早创面愈合时间2～3.5d(天),并减少换药次数.  相似文献   

Analysis of stomach contents of the porbeagle shark (Lamna nasus Bonnaterre) in the northwest Atlantic   总被引：1，自引：0，他引：1  

Joyce  W. N.; Campana  S. E.; Natanson  L. J.; Kohler  N. E.; Pratt  H. L.  Jr; Jensen  C. F. 《ICES Journal of Marine Science》2002,59(6):1263-1269

  相似文献