因子分析法在密鲴生殖力研究中的应用

应用因子分析法研究密鲴繁殖力与诸因素的关系。六个变量是体长、体重、成熟系数、绝对怀卵量和相对怀卵量。29个样本、经正交变换得到3个因子:绝对繁殖因子、相对繁殖因子和成熟因子。     

水质富营养化指标的GM(1,2)预测模型

本文应用灰色GM(1,2)建模方法,提出了水质富营养化单项指标的一种新的预测模型。该模型用于湖水总磷度的预测实例表明预测值与实际值拟合较好。本文还将GM(1,2)预测模型与 Vollenweider预测模型进行了比较。     

融合多特征的遥感影像变化检测方法

本文提出了一种面向对象的多特征融合的变化检测方法。首先通过影像分割获取像斑,然后统计各像斑的光谱直方图和LBP(local binary patterns)纹理直方图,利用G统计量计算不同时期像斑之间的光谱距离和纹理距离,采用自适应的方法将光谱距离和纹理距离加权构建像斑的异质性,最后结合EM(expectation maximization)算法和贝叶斯最小错误率理论获取像斑的变化类别。在QuickBird影像上的实验表明该方法能够充分融合光谱特征和纹理特征,从而提高变化检测的精度。     

An oracle-based data management method for large database in CyberCity GIS

An Oracle8i-based approach is proposed to manage the integrated databases of large CyberCity. This approach consists of threeschemes: ① a special R -tree index is designed to accelerate spatial retrieving, in which the bounding boxes of local regions have no intersection and all leaf nodes of the R -tree (geometry records ) have no repetitiont;② different data compression algorithms are adopted to compress the digital elevation models, 3D vector models and images, such as LZ77 lossless compression algorithm for compression of vector data and JPEG compression algorithms for texture images;③ in order to communicate with Oracle8i database, a CyberCity GIS spatial database engine (SDE) is designed. On the basis of this SDE prototype a case study is done.     

基于ArcSDE+Oracle 9i的防洪减灾综合数据库的构建及应用

以长江荆江河段防洪预警公共信息平台的防洪减灾综合数据库为例，分析了防洪减灾综合数据库的一般要求及应用特点，介绍了基于ArcSDE＋Oracle 9i技术的防洪综合数据库的框架体系和技术思路．并就水利防洪减灾综合数据库的分类、数据库的逻辑设计和存储设计方面的一些细节问题进行了阐述。     

石家庄市主要大气污染物的数值预报

应用CAPPS城市大气污染潜势和污染指数预报系统，对石家庄市主要大气污染物（SO2，NOX，TSP）的污染指数（API）进行模拟分析，结果表明，用CAPPS作城市大气污染预报时，应加入污染物排放的时间系数（Ti)订正和经验系数（Ki)订正，对北方城市而言，还须加入扬尘百分率（F）订正，用加入Ti,Ki和F订正后的CAPPS预报系统，对石家庄市大气污染物（SO2，NOx,TSP)进行模拟，结果SO2，NOx,TSP三种污染物的预报值与其监测值的相关系数分别提高到0．951，0．854和0．880。     

Oracle 8i数据库可视化检索技术及其在遥感图像信息系统中的应用

介绍了遥感图像信息系统对影像数据库的要求，提出了Oracle8i作为影像数据库管理的DBMS的技术方案，进一步说明了可视化检索技术在遥感图像信息系统中的重要性，最后，详细阐明了可视化检索技术的有关概念和工作原理。     

胶东晚中生代金矿成矿的硫同位素组成及热动力源

胶东地区晚中生代金矿床均有一个与岛弧玄武质、安山质岩浆相一致的δ^34(6．5‰-7.0‰)硫源，而全铜矿床的δ^34为4．5‰-5．0‰，与岛弧玄武质岩浆的δ^34接近。可初步认为该区全(铜)成矿流体的热源来自地慢或俯冲地慢楔产生的玄武岩浆。成矿流体的产生与岛弧玄武质岩浆底侵／内侵作用密切相关，形成于被加热的地壳。     

不同尿液标本采集方法对尿沉渣分析仪诊断尿路感染的价值

目的 探索Sysmex UF-1000i尿沉渣分析仪定量检测结果中细菌和白细胞计数在诊断尿路感染中的价值,阐明标本采集送检的不同对UF-1000i诊断尿路感染的影响。方法 选取笔者医院2015年7月~2015年8月466例怀疑尿路感染的入院患者同时做细菌培养及尿常规的检验结果（A组标本）,收集2016年3月下旬~4月上旬148例尿细菌培养清洁中段尿标本,接种之后立即送检尿常规检查（B组标本）。取两组标本的细菌及白细胞计数结果,以细菌培养为金标准用SPSS 18.0统计软件分别绘制ROC曲线,求出尿沉渣细菌和白细胞计数诊断尿路感染的阈值,并计算其敏感度、特异性、阳/阴性预测值、假阳性/假阴性率和准确性,比较两组标本的各项指标。结果 尿沉渣细菌与白细胞定量检测最佳阈值,A组标本分别为101.7/μl与18.8/μl,B组标本分别为98.7/μl与11.1/μl。尿沉渣细菌与白细胞ROC曲线下面积,A组标本分别为0.604与0.661,B组标本分别为0.941与0.848。对B组标本而言,细菌与白细胞联合诊断尿路感染最佳敏感度为82.4%,特异性为92.1%,阳性预测值为77.8%,阴性预测值为93.8%,假阳性率为7.9%,假阴性率为17.6%,准确度为89.9%,并可将细菌培养降低70.9%。结论 UF-1000i尿液沉渣分析仪在诊断尿路感染中有早期筛选,辅助诊断的价值。标本达到无菌采集、中段尿并在2h内送检的要求才能使UF-1000i发挥最大价值。     

Numerical study of the spatial distribution of the M internal tides in the Strait of Sicily

The present study investigates the spatial distribution of the Mipt><img src="/na101/home/literatum/publisher/tandf/journals/content/ggaf20/2016/ggaf20.v110.i02/03091929.2015.1135915/20160321/images/ggaf_a_1135915_ilm0003.gif" alt=" />ipt><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" alt=" class="mml-formula" data-formula-source="{"type" : "image", "src" : "/na101/home/literatum/publisher/tandf/journals/content/ggaf20/2016/ggaf20.v110.i02/03091929.2015.1135915/20160321/images/ggaf_a_1135915_ilm0003.gif"}" /><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" alt=" data-formula-source="{"type" : "mathjax"}" />if">2 internal tide in the Strait of Sicily using a three-dimensional sigma coordinate model, the Regional Ocean Modeling System. Realistic topography and stratification from existing observational data were used. The numerical simulations show that there are three distinct sites of strong Mipt><img src="/na101/home/literatum/publisher/tandf/journals/content/ggaf20/2016/ggaf20.v110.i02/03091929.2015.1135915/20160321/images/ggaf_a_1135915_ilm0004.gif" alt=" />ipt><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" alt=" class="mml-formula" data-formula-source="{"type" : "image", "src" : "/na101/home/literatum/publisher/tandf/journals/content/ggaf20/2016/ggaf20.v110.i02/03091929.2015.1135915/20160321/images/ggaf_a_1135915_ilm0004.gif"}" /><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" alt=" data-formula-source="{"type" : "mathjax"}" />if">2 internal tide generation, namely the western sill of the Adventure Bank, northwest of Sicily and north of Pantelleria isle. The conversion rate of energy from the Mipt><img src="/na101/home/literatum/publisher/tandf/journals/content/ggaf20/2016/ggaf20.v110.i02/03091929.2015.1135915/20160321/images/ggaf_a_1135915_ilm0005.gif" alt=" />ipt><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" alt=" class="mml-formula" data-formula-source="{"type" : "image", "src" : "/na101/home/literatum/publisher/tandf/journals/content/ggaf20/2016/ggaf20.v110.i02/03091929.2015.1135915/20160321/images/ggaf_a_1135915_ilm0005.gif"}" /><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" alt=" data-formula-source="{"type" : "mathjax"}" />if">2 surface to internal tide integrated over the whole model domain amounts to 47.5 MW, 75% of which are found to be generated over the three prominent topographic features mentioned above. The depth- integrated baroclinic energy flux depicts the propagation away from these sites, particularly toward the north and southwest. The maximum flux amplitudes are found in the three main generation sites identified, with the largest value occurring at the narrowest passage through the western sill. A comparison between the model and current-meter measurements at two stations shows reasonable agreement for different depths. The similarities in the spatial distribution of the baroclinic energy flux divergence and the barotropic forcing suggest that the generation of the Mipt><img src="/na101/home/literatum/publisher/tandf/journals/content/ggaf20/2016/ggaf20.v110.i02/03091929.2015.1135915/20160321/images/ggaf_a_1135915_ilm0006.gif" alt=" />ipt><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" alt=" class="mml-formula" data-formula-source="{"type" : "image", "src" : "/na101/home/literatum/publisher/tandf/journals/content/ggaf20/2016/ggaf20.v110.i02/03091929.2015.1135915/20160321/images/ggaf_a_1135915_ilm0006.gif"}" /><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" alt=" data-formula-source="{"type" : "mathjax"}" />if">2 internal tide in the Strait of Sicily results primarily from barotropic tidal flow over sloping topography.