大洋玄武质岩石元素间的线性关系及其应用

批式熔融是大洋玄武质岩石形成的主要机制之一。本文建立了批式熔融作用中元素间的线性关系模型,并应用于北秦岭宽坪群变玄武质岩石化学分析资料的研究,对变异图解、相关矩阵、源区成分计算和估计等问题作了讨论。给出了一些具体应用的方法。     

Batch and Column Experiments on Fluoride Removal from Waters Using Modified Zeolite

INTRODUCTIONNatural and m odified zeolites have been widely used inboth catalytic conversion processes and adsorption separationprocesses. Recently,because of their unique properties,growing interest has been focused on the zeolites for use in ionexchange separation in water softening,pollution abatem ent,energy production,agriculture,metal processing and biomedi-cal areas. Most of the previous work was concentrated on thecation exchange property of zeolites. Several zeolites werefound to…     

两种ArcGIS地理处理工具研究与应用

ArcGIS系列软件提供了多种形式的地理处理工具,模型构建器和Python脚本是其中的典型代表。本文以地形图数据库批量图幅裁切问题为例,按照数据准备、单图框裁切、重复单图框裁切的思路将这一地理处理过程分解,用模型构建器和Python脚本两种工具分别实现了矢量数据批量裁切的功能,详细地介绍了两种方法的技术要点及细节,获得了预期的结果数据,并比较分析了两者的优劣势及相互联系。     

一种订货带有折扣的库存-生产模型的优化分析

建立了由一个仓库和一个加工车间组成的库存-加工系统模型,该模型具有随机的需求过程和随机的供货时间.在假设允许缺货,订货带有批量折扣,并采用(s,S)库存策略的条件下,用排队论得到了该系统的无穷小生成元,给出了系统的费用函数,并对库存策略进行了优化分析.     

微生物絮凝剂投加方式对好氧颗粒污泥性能的影响

为提高好氧污泥颗粒化速度, 采用微生物絮凝剂, 探讨在好氧颗粒污泥培养过程中微生物絮凝剂的投加方式对颗粒污泥理化性能及生物降解效能的影响。结果表明:微生物絮凝剂每隔2、3、5、7 d投加一次时, 均可培养出成熟的好氧颗粒污泥, 微生物絮凝剂的投加方式对好氧污泥颗粒化的影响较显著;微生物絮凝剂最佳投加方式为每5天投加一次, 此时颗粒化速度快, 颗粒形成时间由未投加的60 d缩短为42 d, 好氧颗粒污泥疏水性好, 污泥体积指数稳定在40 mL/g左右, 沉降速度达35.06 m/h, COD、氨氮和总磷的去除率分别为96.55%、93.29%和87.29%。     

基于Python的ArcGIS空间数据格式批处理转换工具开发

ArcGIS仅提供了单个文件的空间数据格式转换工具。本文首先研究基于Python的ArcGIS空间分析工具开发方式,进而以栅格数据转ASCII工具为例,给出其批处理工具的具体实现过程。     

基于ArcMap与Erdas的影像批量裁切研究——以第一次全国水利普查遥感数字正射影像标准分幅裁切为例

数字正射影像生产实践中,需要按照要求进行大量的裁切分幅操作,本文以全国水利普查遥感数字正射影像分幅裁切为例,分别利用ArcMap与Erdas软件,通过编写相应的命令集,实现了影像的快速批量裁切,并对裁切成果进行了分析总结。     

雷达个例资料整编批处理技术与业务应用

在新一代天气雷达业务观测中,采用降水观测模式2,一天有近240个基数据和约有7200个数据产品。由于基数据和数据产品文件名与资料整编文件名格式上的差异很大,如果仅依靠人工进行整编,不仅文件多、信息量大,而且文件的重命名、校对审核尤为困难。系统地介绍了雷达个例资料整编的关键技术和解决方案,通过计算机实现了文件命名的自动批处理,采用向导式任务处理技术实现了雷达个例资料整编的自动化、批量化、流程化和标准化。     

Influence of plant on the extractability of estrogen in the rhizospheric soil

Livestock wastes applied to agricultural land are potential sources of steroidal hormones （estradiol （E2）, estrone （E1）, and estriol （E3）） that can adversely affect the aquatic ecosystem as endocrine disruptors. But the effects of plants on the fate of estrogen in the environment are not clearly known. In the present report, the behavior of E1, E2 and E3 added to the rhizospheric soil in various concentrations and its effect on plant growth were examined by estrogen batch sorption test, plant pot test and estrogen extraction test. Trifolium repens was grown on the soil spiked with E2 or a mixture of E1, E2 and E3. Pots without plant were prepared as controls. All pots were watered in 50 ml dose almost every day, and the rhizosheric soil and plant body were collected 7, 19, 26, 33 days after planting. The soil was sequentially extracted with Milli-Q water, and methanol / 1M acetic acid solvent followed by methanol wash at the solid to liquid ratio of 1 ： 4 （g/mL）. Extracts were analyzed for El, E2 and E3 using a Shimadzu GCMS-QP5050. Plant dry weight （4 hours, 105 ℃） was measured as an indicator of plant growth. In batch sorption tests, E1 and E2 concentrations in the liquid phase significantly decreased within 24 hours after the addition of estrogen. The sum of methanol / 1M acetic acid extractable E 1 and E2 in the soil decreased to half of the initial added amount within 7 days. Reduction in total estrogenic activity of the soil extracts （estimated as 0.01CE1＋CE2＋0.1CE3 where CE1, CE2 and CE3 are respective El, E2 and E3 concentrations per unit soil weight） continued for 1 month due to slow oxidation of E2 to E1. Desorption of E2 from soil during the pot experiment was higher than expected from the sorption experiment.     

Swarm系列卫星非差运动学厘米级精密定轨

采用2015年5月24日—30日的Swarm星载GPS双频观测数据,基于Melbourne-Wübbena(MW)和消电离层线性组合,在精密单点定位技术的基础上,采用批处理最小二乘估计法对不同轨道高度的Swarm系列卫星进行非差运动学精密定轨。利用星载GPS相位观测值残差、与欧空局发布的简化动力学轨道对比,以及SLR检核3种方法对Swarm系列卫星非差运动学定轨结果进行精度评估。结果表明:①Swarm系列卫星星载GPS相位观测值残差RMS为6~7 mm;②与欧空局发布的简化动力学轨道进行求差,径向、切向及法向轨道差值RMS为2~4 cm;③与欧空局发布的运动学轨道进行求差,径向、切向及法向轨道差值RMS为1~2 cm;④SLR检核结果表明Swarm-A/B/C卫星轨道精度为3~4 cm。因此,采用非差运动学定轨方法与本文提供的定轨策略进行Swarm系列卫星精密定轨是切实可行的,定轨精度为厘米级。