Ordovician Carbonate Reservoir Bed Characteristics and ReservoirForming Conditions in the Lungudong Region of the Tarim Basin

<正>Basic characteristics of Ordovician carbonate reservoir beds in the Lungudong region of northeastern part of the Tarim Basin are described in detail and the reservoir-forming conditions of oil and gas are preliminarily discussed in this paper by collecting and sorting out a large amount of data.The carbonate reservoir beds are mainly developed in open-platform and platform marginal facies;the reservoir beds have large changes in and low average values of physical property;the main type is fractured reservoir beds with the fracture-porous type second.The reservoir bed development is chiefly controlled by the distribution of sedimentary facies,tectonic activity and karstification. Whereas the accumulation and distribution of hydrocarbons in the region are controlled by an advantageous structural location,a good reservoir-caprock combination and a favorable transporting system,with the distribution characterized by zones horizontally and belts vertically,the oil and gas are mainly concentrated in areas with structural uplift,densely developed fractures,and surface karst,a vertical vadose zone,and a horizontal undercurrent belt of palaeokarst.     

汾河二库蓄水对兰村水源地影响的数值模拟研究

首先建立了汾河二库及其下游地区水文地质概念模型,然后根据地下水水头长观资料识别模型的水文地质参数,运用可视化标准软件Visual Modflow,建立了地下水三维不稳定流模型来刻画汾河二库地下水下游区域流动的基本规律。运用识别后的模型预测了未来2010年和2015年水库不同蓄水位条件下的地下水动态变化。模拟结果表明,汾河二库的建成使周围地下水流动发生了变化,水库蓄水造成流域地下水位的上升,但对兰村水源地的影响有限。     

新疆伊热达坂铅锌矿矿床地质特征及找矿标志

伊热达坂铅锌矿区位于塔里木微板块的塔里木北缘古生代被动陆缘带,阿尔彼什麦晚古生代前陆盆地,矿体主要赋存于上泥盆统哈孜尔布拉克组下段（D3h1）。本文主要对伊热达坂铅锌矿床地质特征进行分析和总结,初步揭示矿床的找矿标志。     

北京延庆高于庄组凝灰岩的锆石U-Pb定年研究及其对华北北部中元古界划分新方案的进一步约束

作者最近在北京延庆高于庄组张家峪亚组上部发现了凝灰岩,并测得了该凝灰岩中锆石1559±12Ma的SHRIMPU-Pb年龄和1560±5Ma的LA-MC-ICPMS U-Pb年龄。这一新的高精度定年结果表明,华北北部高于庄组形成于中元古代初期的盖层纪(Calymmian Period,1600~1400Ma)早期。结合早先大红峪组火山岩的锆石U-Pb年龄(1622~1625Ma),现在可以确切地将高于庄组的底界年龄限定在1600Ma左右。结合最近在铁岭组斑脱岩获得的锆石U-Pb年龄(~1440Ma),本文再次建议,应将华北中元古界蓟县系的底界下拉到高于庄组底界,自该组底部(1600Ma)到铁岭组顶部(1400Ma)的巨厚碳酸盐岩序列都属于新定义的蓟县系,并对应于国际中元古界的盖层系,高于庄组与大红峪组之间的界线则可作为蓟县系与长城系的分界标志。高于庄组凝灰岩锆石的精确定年,为华北北部中元古界年代地层划分等研究,提供了直接的年代学约束。     

Impacts of hydrological conditions on enzyme activities and phenolic concentrations in peatland soil: An experimental simulation

Impacts of hydrological conditions on peatland soil enzyme activities and phenolic concentrations were investigated using peat cores from two typical peatlands, the forest swamp and the marsh in North-east China, under water level manipulation in the laboratory. The results indicated varied impacts of dry and waterlogged conditions on soil enzyme activities, depending on the confounding factors including the peatland types and the variation frequency of hydrological conditions. Carbon-related enzyme activities, phenol oxidase and β-glucosidase, were much higher in the marsh than in the forest swamp. On the contrary, phenolic concentration was measured to be much higher in the latter. Soil enzyme activities and phenolic concentrations were found to vary between the two peatlands, much more remarkably than within the individual peatlands caused by the changes in the water level. The negative relationship or inconspicuous correlation between phenolics and phenol oxidase was found to vary with specific soil conditions. These results implied that the enzyme activities and phenolic concentrations might be related to the developmental stages or the types of wetlands more than to hydrological conditions.     

香港牡蛎(Crassostrea hongkongensis)新型凝集素ChPerlucin的基因克隆与功能研究

C-型凝集素(C-type lectin)是一类能识别并结合多糖的免疫蛋白质超家族, 本文首次克隆了一种新型香港牡蛎C-型凝集素基因——甘露聚糖结合凝集素, 并获得了该基因的全长序列, 命名为ChPerlucin。结果显示, ChPerlucin基因cDNA全长577bp, 包括21bp的5′末端非翻译区(untranslated region, UTR)、73bp的 3′UTR, 以及483bp的开放阅读框(open reading frame, ORF), 编码160个氨基酸, ChPerlucin蛋白理论分子量为18kD, 等电点为5.95。ChPerlucin蛋白含有保守的C-型凝集素样结构域(C-type lectin or carbohydrate-recognition domain, CLECT); 邻接法(Neighbor-Joining, NJ)进化树分析表明, ChPerlucin与其他贝类的Perlucin聚为一支, 说明该基因是软体动物Perlucin家族的新成员。qRT-PCR结果显示, ChPerlucin在香港牡蛎所检测组织和各个胚胎发育时期中均有表达; 病原菌刺激后, ChPerlucin表达量显著升高; 利用毕赤酵母真核成功表达了ChPerlucin重组蛋白, 发现ChPerlucin重组蛋白具有抑菌效果。以上结果表明ChPerlucin在香港牡蛎的先天性免疫过程中发挥了重要的作用。     

深度学习支持下的宅基地复垦项目真实性智能审查技术研究与应用

全域综合整治背景下的宅基地复垦项目审查是保证复垦项目合法性合规性的有效手段,针对当前宅基地复垦项目审查效率低的问题,本文提出了基于遥感影像的农村宅基地复垦项目立项真实性审查方法。首先以重庆市农村宅基地复垦项目为例,建立宅基地复垦项目立项真实性审查模型,利用改进的U-Net模型准确提取建筑物,然后与复垦红线叠加实现复垦项目真实性的智能审查。试验结果表明,该方法能够快速准确地审查复垦项目真实性,对优化土地结构、促进土地流转、实现乡村振兴具有重要意义,可为全域综合整治背景下宅基地复垦项目真实性审查提供技术参考。     

Precipitation type estimation and validation in China

The results from three methods aimed at improving precipitation type(e.g., rain, sleet, and snow) estimation are presented and compared in this paper. The methods include the threshold air temperature(AT), threshold wet bulb temperature(WBT) and Koistinen and Saltikoff(KSS) methods.Dot graphs are plotted to acquire the threshold air temperature or the threshold wet bulb temperature using daily averaged air temperature, wet bulb temperature and precipitation data at 643 stations from 1961 to 1979(precipitation types are not labeled in the database from 1980 to present) in China. The results indicate that the threshold AT or WBT methods are not able to differentiate rain, sleet and snow in the most regions in China; sleet is difficult to differentiate from other precipitation types based on the two threshold methods. Therefore, one threshold AT and WBT method was used in this study to differentiate rain and snow. Based on GaussianKriging interpolation of threshold air temperature(T0and wet bulb temperature(Tw), the T0 and Tw contour lines and contour surfaces are calculated for China.Finally, a comparison between the KSS, AT and WBT methods are provided in which the KSS method is calculated based on air temperature and relative humidity. The results suggest that the KSS method is more appropriate for water phase estimation than are the other methods; the maximum precision for rain and snow is 99% and 94%, respectively. The AT method performs better than the WBT method when the critical air temperature is 2°C.     

QuikSCAT卫星散射计矢量风检验及南海月平均风场特征分析

采用中国科学院南海海洋研究所2008年建设的,西沙海洋观测研究站上的自动气象站实测数据,对亚太数据研究中心提供的近实时QuikSCAT卫星遥感风场资料(2008年4月6日—12月31日)进行了检验和统计特征分析,得出:这两者风速的相关系数为0.86,平均偏差为-1.50 m/s,均方根误差为1.71 m/s,表明QuikSCAT卫星遥感风场资料在南海具有很高的适用性。在此基础上,利用QuikSCAT卫星遥感的月平均风场资料分析了南海月平均风场特征。结果表明:(1)南海季风10月到次年3月盛行东北风,6—8月盛行西南风,4、5、9月为季风转换季节;(2)存在两个平均风速大值中心,一个位于南海南部(10°N,108°E)附近,另一个位于台湾海峡附近,其位置和强度会随着季节变化而变动。     

采用非线性决策树的学生课堂教学满意度研究

学生反馈是评估高等院校课堂教学质量的重要指标。目前,对学生反馈的问卷仅进行主观理解和简单统计,无法提供准确定量的分析和支持依据。使用非线性决策树,对近3年本科必修双语课程《数字图像处理》的学生评教问卷进行数据挖掘,首先将其分成3类和10个不同输入,然后通过数据预处理、模型选择和建模,最后构建树状模型对其进行分析。分析结果符合对于该课程学生反应和争议较大的问题预期,为课程设计提供定量有效的教学分析工具。